Skocz do pozycji: 1.

Tytuł:

Various ionic substitutions in hydroxyapatites - physicochemical studies

Autorzy:

Kolmas, J.
Laskus, A.
Szurkowska, K.
Pajor, K.
Pajchel, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/285828.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

hydroxyapatite
ions
physicochemical analysis

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 45
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 2.

Tytuł:

The effect of plasma treatment on surface physicochemical properties of chitosan/glucan/HA biomaterial

Autorzy:

Przekora, A.
Pawłat, J.
Terebun, P.
Kwiatkowski, M.
Ginalska, G.

Powiązania:

https://bibliotekanauki.pl/articles/283980.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

plasma
biomaterials
physicochemical properties

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 9
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 3.

Tytuł:

Physico-chemical properties of Rhododendron honey produced in Turkey
Właściwości fizykochemiczne miodu rododendronowego produkowanego w Turcji

Autorzy:

Rasgele, P.G.
Kekecoglu, M.

Powiązania:

https://bibliotekanauki.pl/articles/71672.pdf

Data publikacji:

2013

Wydawca:

Instytut Włókien Naturalnych i Roślin Zielarskich

Tematy:

physicochemical property
Rhododendron
honey
physicochemical analysis
chestnut
flower
Turkey [geogr.]

Opis:

Rhododendron honey is a monofloral honey and it is collected from the flowers of Rhododendron species widely spreading over many countries, mainly in America, Turkey, Indonesia, Australia. It is belived that Rhododendron honey treats several disorders and is used traditionally as an alternative medicine. The determination of the chemical characteristics of the Rhododendron honey is essential for public health. In this research, the physicochemical characteristics of Rhododendron, chestnut and flower honey samples collected from beekeepers in Turkey were determined and compared. Physico-chemical parameters such as moisture, acidity, sucrose, invert sugar, fructose/glucose, conductivity, diastase and hydroxymethylfurfural were analysed in each honey sample. According to the results obtained, no differences were found in physico-chemical properties of Rhododendron, honey samples, except from moisture and acidity compared with those of chestnut and flower honeys. In order to differentiate Rhododendron honeys, new methods should be developed. This honey should be reintroduced to medicine and used in pharmaceutical industry.
Miód rododendronowy jest miodem jednokwiatowym zbieranym z kwiatów roślin z rodzaju Rhododendron. Jest rozpowszechniony w wielu krajach Ameryki, a także w Turcji, Indonezji i Australii. Uważa się, że miód rododendronowy leczy niektóre zaburzenia i jest używany w medycynie alternatywnej, zatem określenie składu chemicznego miodu rododendronowego jest ważne dla zdrowia społeczeństwa. W pracy określono i porównano cechy fizykochemiczne próbek miodu rododendronowego, kasztanowego i kwiatowego otrzymanego z pasiek w Turcji. W każdej próbce oznaczano cechy fizykochemiczne takie jak wilgotność, kwasowość, poziom sacharozy i cukru inwertowanego, stosunek fruktozy/glukozy, przewodność elektryczna, diastaza i hydroksymetylofurfural. Zgodnie z otrzymanymi wynikami, nie znaleziono różnic w cechach fizykochemicznych próbek miodu z rododendronu, za wyjątkiem wilgotności i kwasowości w porównaniu z miodem z kasztanowca i kwiatowym. W celu wychwycenia cech charakteryzujących tylko miód rododendronowy potrzeba zastosowania nowych metod. Miód ten powinien zostać ponownie wprowadzony do użycia w medycynie i przemyśle farmaceutycznym.

Źródło:

Herba Polonica; 2013, 59, 3
0018-0599

Pojawia się w:

Herba Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 4.

Tytuł:

Physicochemical characteristics of land waters in the Bellsund region (Spitsbergen)

Autorzy:

Chmiel, S.
Bartoszewski, S.
Gluza, A.
Siwek, K.
Zagórski, P.

Powiązania:

https://bibliotekanauki.pl/articles/294579.pdf

Data publikacji:

2007

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

physicochemical characteristics
Spitsbergen
land waters

Źródło:

Landform Analysis; 2007, 5; 13-15
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 5.

Tytuł:

Collagen - structure, properties and application

Autorzy:

Owczarzy, Aleksandra
Kurasiński, Robert
Kulig, Karolina
Rogóż, Wojciech
Szkudlarek, Agnieszka
Maciążek-Jurczyk, Małgorzata

Powiązania:

https://bibliotekanauki.pl/articles/1844977.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

collagen
collagen structure
physicochemical properties
biological properties
DDS
physicochemical techniques
atelocollagen

Opis:

Collagen is the dominant component of the extracellular matrix of mammals. It occurs almost in all animal tissues. Collagen is a highly heterogeneous protein. The collagen protein family is characterized by great diversity in terms of structure, occurrence, and function. Up till now, 29 types of collagens proteins have been classified. The representation of individual types of collagen has certain common features. The most important property is the above-average mechanical strength that results directly from the spatial structure. Collagen is a building material for most tissues and organs. It also plays an important role in the process of cell growth and differentiation, which results from the specific structure of collagen fibers as well as their ability to adhere. The development of research techniques allowed to study in detail the molecular structure and properties of collagen. Therefore, collagen has become a subject of interest in many branches of science. Synthetic recombinant collagen fibers were developed as the basis of collagen biomaterials for medical applications, including implantology or gynecology. The specific structure of collagen also makes it applicable as a protein carrier in drug delivery systems (DDS), particularly in the treatment of cancer and genetic diseases. The use of tissue regenerative abilities and an interdisciplinary look at the properties of collagen and collagen-based biomaterials may constitute the future of medical development.

Źródło:

Engineering of Biomaterials; 2020, 23, 156; 17-23
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 6.

Tytuł:

Study of some physicochemical and rheological properties of irradiated honey

Autorzy:

Bera, A
Almeida-Muradian, L. G.
Sabato, S. F.

Powiązania:

https://bibliotekanauki.pl/articles/147025.pdf

Data publikacji:

2008

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

gamma radiation
honey
rheology
physicochemical properties

Opis:

Honey is a sweet substance produced by bees, well appreciated in many places and its consumption has been increased either as raw material or as a food ingredient. Its use as food by the consumer, or even for exportation, implies safety inherent in its quality and processing control. Gamma radiation can be applied in food or ingredients for many objectives like pathogens microorganisms’ reduction, disinfestations, and sterilization. The aim of this work was to verify some physicochemical modifications, as well as rheological evaluation of honey submitted to irradiation at 10 kGy. The physicochemical parameters analyzed were: moisture, HMF, free acidity, pH, sugars and ash. The rheological behavior was measured at different temperatures. The results indicated that few changes occurred; the rheological behavior was not impaired and did not present any significant physicochemical alteration.

Źródło:

Nukleonika; 2008, 53, suppl. 2; 85-87
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 7.

Tytuł:

Physicochemical Properties of Soils derived from Sandstone Parent Materials under Selected Land use types at Agoi-Ibami in Central Cross River State, Nigeria

Autorzy:

Eyong, M. O.
Akpa, E. A.

Powiązania:

https://bibliotekanauki.pl/articles/1076791.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Physicochemical properties
Sandstone
land use types

Opis:

Three profiles were sited on the major landscape elements of crest, middle slope and lower slope on three land uses; Forest (FS), Rubber (RS) and arable cropping (AS) at Agoi-Ibami in Central Cross River State, Nigeria. For study purposes, soil samples were collected from the morphogenetic horizons for the analysis of physical and chemical properties. Results showed that the surface horizon textures were mostly sandy loams with little sandy clay loam, while subsurface textures were mostly sandy clay loams with few silt clay loams and clays. The bulk densities were below the ranges of 1.46 to 1.63 g cm-3 for silts and clays and 1.75 g cm-3 for sands. This imposes stresses such as mechanical resistance to root penetration, decrease in cultivation and organic matter. The surface and subsurface pH values vary from 4.9–4.5 in FS, 4.9-4.6 in RS and 4.9 in AS, indicating that the soils are very strongly acidic. The Organic carbon contents was low with mean values of 4.33 and 0.6 % in surface and subsurface for FS, 2.10 and 0.50 % for surface and subsurface for RS, while surface and subsurface values proved to be 0.57 and 0.31 % for AS. The nitrogen contents was also low, mean values of 0.16 and 0.06 % for surface and subsurface for FS, 0.23 and 0.08 % for surface and subsurface for RS, and 0.19 and 0.10 % for surface and subsurface for AS. The content and available phosphorus are equally low, except for AS, with surface mean values ranging from 11.52 mg kg-1 to 13.87 mg kg-1. The exchangeable cations, Ca, Mg, K, and Na were very low, while exchangeable H+ and Al3+ were high. Base saturation was also low in FS and AS (< 50%) in surface soils, but higher in AS in the surface and in RS in the subsurface soils. The mean values of organic matter were 4.33 and 0.16 %. The land use should, therefore, be adjusted by application of recommended inorganic fertilizers and organic matter so as to support growth of crops such as maize, yams, cassava etc.

Źródło:

World News of Natural Sciences; 2019, 23; 1-12
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 8.

Tytuł:

Suitability Assessment of Groundwater for Irrigation Purpose in Veppanthattai Block, Perambalur District, Tamil Nadu

Autorzy:

Ibraheem, A. Mohamed
Mazhar Nazeeb Khan, S. M.

Powiązania:

https://bibliotekanauki.pl/articles/1178314.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Groundwater
Irrigation
Physicochemical parameters
Season
Veppanthattai

Opis:

Groundwater is a major water source for agricultural irrigation in Veppanthattai block. Forty-five groundwater samples were collected at various standard locations from the study area in the year of 2015 at pre-monsoon, post monsoon and monsoon seasons periodically. The concentrations of physicochemical parameters like pH, Electrical Conductivity (EC), total dissolved solid (TDS), Total Hardness (TH), Ca2+, Mg2+, Na+, K+, HCO3ˉ, SO42-, Clˉ, NO3ˉ and PO43- were analyzed. The results of the concentrations were interpreted and compared with different irrigation standards namely EC, Percent Sodium (%Na), Sodium Adsorption Ratio (SAR), Residual Sodium Carbonate (RSC), Permeability Index (PI), Kelly’s Ratio (KR), Ion Exchange as chloro-alkaline indices (CAI-I and CAI-II), Chloride classification and Magnesium ratio.

Źródło:

World Scientific News; 2017, 81, 2; 81-93
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 9.

Tytuł:

Hydroxyapatite as a support in protease immobilization process

Autorzy:

Zdarta, J.
Budzinska, K.
Kolodziejczak-Radzimska, A.
Klapiszewski, Ł.
Siwinska-Stefanska, K.
Bartczak, P.
Piasecki, A.
Maciejewski, H.
Jesionowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/110452.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

hydroxyapatite
enzyme immobilization
protease
physicochemical characteristic

Opis:

Hydroxyapatite is used as a matrix for immobilization of protease from Aspergillus oryzae by a process of adsorption. The matrix obtained has the surface area of 26 m2/g and particles in the shape of flakes of diameters no greater than 650 nm. The efficiency of the proposed method was confirmed by the Fourier transform infrared spectroscopy, elemental analysis and by analysis of parameters of the pore structure of matrix and products after immobilization. On the basis of the Bradford method it was found that the greatest amount of enzyme (132 mg/g) was immobilized from a solution of initial enzyme concentration of 7 mg/cm3 after 24 h of the process.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 2; 633-646
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 10.

Tytuł:

Leachate Monitoring and an Assessment of Groundwater Pollution from the Tangier Landfill

Autorzy:

Elmaghnougi, Ikram
Tribak, Abdelghani Afailal
Maatouk, Mustapha

Powiązania:

https://bibliotekanauki.pl/articles/2105516.pdf

Data publikacji:

2022

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

leachate
pollution
groundwater
physicochemical
heavy metals

Opis:

Leachate from public landfill in the city of Tangier, which is neither collected nor treated, could constitute a probable source of pollution of the groundwater table and of those of the Mlalah and Khandak Bou Hajjar wadis in the east, and the Mghogha and Ghir Boudra wadis to the south. This work aims to analyze the level of contamination at Tangier’s municipal waste disposal. The leachate samples were collected and analyzed during the period from 2016 to 2019 and the physicochemical parameters (humidity, pH, organic matter, etc.) were determined on these samples as well as the contents of five heavy metals (lead, cadmium, iron, chrome and zinc). Analysis of the well water shows the presence of polluting elements in the leachate water and a high concentration of metals (especially iron) that exceeds standards. This makes the effluent extremely toxic and thus presents a permanent threat to the health of the local population and the surrounding environment.

Źródło:

Geomatics and Environmental Engineering; 2022, 16, 3; 111--130
1898-1135

Pojawia się w:

Geomatics and Environmental Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 11.

Tytuł:

Evaluation of the differentiation of structural and physicochemical properties of orthodontic wires of AlSl 304 stainless steel

Autorzy:

Grygier, D.
Hoppe, V.
Zięty, A.
Rutkowska-Gorczyca, M.

Powiązania:

https://bibliotekanauki.pl/articles/284388.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

wires
orthodontic arches
physicochemical properties

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 14
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 12.

Tytuł:

Quality assessment of vegetable oil industry effluents in Port Harcourt, Rivers State, Nigeria

Autorzy:

Verla, A. W.
Verla, E. N.
Adowei, P.
Briggs, A.
Horsfall Jnr, M.

Powiązania:

https://bibliotekanauki.pl/articles/412234.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

physicochemical
wastewater
biodegradability
pollutants
indices

Opis:

Five composite samples of waste water were collected from waste water tank of a vegetable oil refining company and were analyzed for physiochemical characteristics, heavy metal and organic pollutants. Physicochemical determinations were done according to standard methods; heavy metals were determined by use of Atomic Absorption Spectrophotometer method while organic pollutants were determined by Gas chromatography system HP 6890 series. Sulphate was determined by vanadomolybdophosphoric acid method while phosphates and chlorides were determined by argentometric method. Results reveal that effluent pH (4.67 ±0.015), salinity (125 ±4.50 %) and BOD5 (17.83 ±1.70 mg/l) were bellow WHO standard whereas TDS (127.7 ±5.77 mg/l), TSS (563.6 ±3.15 mg/l) and COD (3959 ±3.8 mg/l) were above WHO standards. Heavy metal pollution index (0.31) showed no multi-element contamination arising from effluent. The degree of contamination (1.84) showed that the effluent has a moderate polluting potential. Lower molecular weight PAHs showed a significant difference even though most of the organic compounds in vegetable oil refinery wastewater showed good biodegradability that varied weekly. Therefore there is either no treatment or an in effective treatment of the effluents. This could result to serious environmental problems in the near future.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 14, 2; 179-189
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 13.

Tytuł:

Contribution to the Treatment of Urban Wastewater in the City of Fez by Coagulation and Flocculation Using a Biodegradable Reagent

Autorzy:

Elmansouri, Ibtissame
Lahkimi, Amal
Benaabou, Mohamed
Chaouch, Mehdi
Eloutassi, Noureddine
Bekkari, Hicham

Powiązania:

https://bibliotekanauki.pl/articles/2027813.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

treatment
physicochemical
microbiological
urban water

Opis:

This study includes two parts; the first one, concerns evaluation of the physicochemical and microbiological quality of the urban wastewater of the city of Fez, through a space-time dynamics. In turn, the second part deals with the contribution to the treatment of these effluents, by a new biodegradable reagent in the process of physicochemical treatment (coagulation flocculation). For this purpose, the sampling of urban wastewater was carried out 4 months (September, December, February and June 2019), at a rate of two samplings per period on 4 specific sites along the river Fez, the degree of contamination of which differs from one site to another, according to space and time. The diagnostic of these stations showed a high level of pollution that is difficult to biodegrade. Indeed, this pollution can cause negative effects not only on the environment but also on human’s health. In order to take long-term action against the low quality of water and to replace certain inorganic coagulants, alternative processes for water treatment using cactus powder were set up. The characterization of results showed that the urban effluent has a high load in terms of electrical conductivity (EC), dissolved oxygen, chemical oxygen demand (COD), as well as concentrations of faecal coliforms, streptococci and staphylococci. In addition, the purifying power revealed that the removal rate of COD reaches maximum values of 38% and 58% forlimeand the mixture of lime with cactus powder, respectively.

Źródło:

Journal of Ecological Engineering; 2022, 23, 2; 77-85
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 14.

Tytuł:

Influence of chitosan nonwoven fabric modification on its physicochemical and biological properties

Autorzy:

Dzierzkowska, Ewa
Ścisłowska-Czarnecka, Anna
Kolesińska, Beata
Boguń, Maciej
Stodolak-Zych, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/284448.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nonwoven fabric
modification
physicochemical properties
biological properties

Źródło:

Engineering of Biomaterials; 2019, 22, no.153; 108
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 15.

Tytuł:

Coupling mineralogy with physicochemical parameters in view copper flotation efficiency improvement

Autorzy:

Naumov, Dejan
Stamenov, Lachezar
Gaydardzhiev, Stoyan
Bouzahzah, Hassan

Powiązania:

https://bibliotekanauki.pl/articles/109556.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

copper ore
flotation
quantitative mineralogy
physicochemical factors

Opis:

The Chelopech epithermal arsenic bearing high-sulphidation, copper-gold deposit located in Bulgaria is often considered as the richest European gold deposit. Selected physicochemical parameters have been measured at key flotation streams inside the processing plant. Sampling campaign has followed with samples being submitted to chemical and mineral liberation analyses. A quantitative analysis has enabled to link copper flotation response to the type of copper bearing minerals and physiochemical parameters such as redox potential (Eh), dissolved oxygen (DO), EDTA extractable Cu and Fe. Data from the mineral liberation analysis (MLA) have highlighted an important process- relevant information explaining the variable floatability in different particle size ranges. A low chalcopyrite recovery can be linked to the non-sufficient amount of dissolved oxygen inside the copper selective flotation. Given the finely-disseminated copper bearing minerals, copper losses due to particle locking could be suggested as well.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 3; 701-710
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 16.

Tytuł:

Synthesis and characterization of polymer biocomposites with lignin

Autorzy:

Goliszek, Marta
Podkościelna, Beata

Powiązania:

https://bibliotekanauki.pl/articles/110212.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

lignin
biocomposites
physicochemical properties
eco-filler
photopolymerization

Opis:

A new method of synthesis of polymer biocomposites with lignin using the photopolymerization method has been proposed. Bisphenol A glycerolate (1 glycerol/phenol) diacrylate (BAGDA) was used as a main monomer and 2-ethylhexyl acrylate (EHA) as a reactive diluent. Lignin (L) was applied as an eco-filler. The influence of the increasing lignin content (0; 2.5; 5; 10; 20% w/w) on the properties of the obtained biocomposites was investigated. The chemical structure of biomaterials was investigated by the attenuated total reflectance Fourier transform infrared spectroscopy (ATR/FT-IR) method while the thermal properties were studied by the differential scanning calorimetry (DSC) and thermogravimetric analysis (TG/DTG). Their hardness was measured by the Shore D method. Incorporation of the biopolymer into the structure of polymer composites could be a promising alternative to synthetic materials and would contribute to better lignin utilization. The results of the study are of practical importance in prospective applications of biocomposites with lignin.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1375-1381
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 17.

Tytuł:

Content of the Label Paper and the Variation of Physico-Chemical Parameters in Bottled Water in Kosovo

Autorzy:

Çadraku, Hazir

Powiązania:

https://bibliotekanauki.pl/articles/2202226.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

water quality
bottled water
physicochemical parameter
Kosovo

Opis:

Water is a vital resource for the existence of mankind and all ecosystems on Earth. Before using it, it must be ensured that water is of good quality, within the hygienic-sanitary norms for human consumption. In recent decades, the supply of drinking water has been supplemented with the water bottled in glass and plastic bottles, which is found everywhere in the market of the Republic of Kosovo. This paper deals with the content of the label paper and the variation of physico-chemical parameters of bottled water which is extracted, analyzed, processed, filled, packaged and distributed on the market of the Republic of Kosovo and beyond as a product for consumption. i.e. In this paper 20 brands of groundwater (types of water) produced and packaged in the territory of Kosovo.

Źródło:

Journal of Ecological Engineering; 2022, 23, 11; 122--131
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 18.

Tytuł:

Concentration of heavy metals in the soil and translocation with phytoremediation potential by plant species in military shooting range

Autorzy:

Magaji, Y.
Ajibade, G. A.
Yilwa, V. M. Y.
Appah, J.
Haroun, A. A.
Alhaji, I.
Namadi, M. M.
Sodimu, A. I.

Powiązania:

https://bibliotekanauki.pl/articles/1157708.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Heavy metals
Physicochemical parameters
Phytoremediation
Translocation

Opis:

Concentration of seven (7) metals (Pb, Cu, Zn, Mu, Ni, Cr, and Cd) in the samples of soil and some plant species collected from Kachia military shooting range were determined. The mineral ions were assayed using the acid digestion method and atomic absorption spectrophotometry (AAS). Physicochemical parameters (pH, EC, Bulk density, water holding capacity and Total Nitrogen) of the soil samples were also determined. Of the 7 metals determined in the soils samples, the concentration of Pb (14.85 ± 6.78 mg/kg-1) was the highest compared to the concentrations of other metals. Physicochemical parameters were within the range that allows effective phytoremediation. Cu showed the lowest concentration (0.55 ± 1.68 mg/kg-1). Ni was below the detectable limit in most of the samples. Similarly, concentrations of Pb (12.30 mg/kg-1) in the shoot of Albizia zygia among other metals were higher than those of the other metals in the plant tissues. Concentration of Cd (0.07 mg/kg-1) in the root of Eragotis tremula was the lowest. Generally, metal ion concentration in the soil and plant samples of the shooting range (polluted site) significantly) differed from those of the non-polluted site (P<0.05). Combretum hispidium among the plant species had the highest translocation factor (TF = 2.91). Although the TF was higher in the plant of the polluted site TF >1), reasonable amount of them were retained within the underground tissues (roots).

Źródło:

World Scientific News; 2018, 92, 2; 260-271
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 19.

Tytuł:

Effect of physicochemical properties of triticale starch on selected indices of bread quality
Wpływ fizykochemicznych właściwości skrobi z pszenżyta na wybrane wskaźniki jakości chleba

Autorzy:

Gambus, H.
Lewczuk, J.
Nowotna, A.
Fortuna, T.

Powiązania:

https://bibliotekanauki.pl/articles/1399134.pdf

Data publikacji:

1988

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

triticale starch
physicochemical characteristics
bread volume

Opis:

Starches were isolated from 28 Polish triticale lines by the laboratory method, and their fundamental physicochemical properties determined. Next, pup loaves were baced in the starch - gluten system (by the direct method) and the volume of the loaves was measured. The results were subjected to statistical analysis which showed a positive correlation between bread volume and viscosity of starch pastes.
Skrobie wyizolowane metodą laboratoryjną z 28 polskich rodów pszenżyta przebadano pod względem ich właściwości fizykochemicznych. Używając tego samego glutenu i różnych próbek skrobi z pszenżyta wypiekano chlebki metodą bezpośrednią w systemie skrobia-gluten. Oznaczano: upiek, stratę wypiekową całkowitą, wydajność oraz barwę skórki i elastyczność miękiszu chlebków. Fizykochemiczne właściwości skrobi oraz objętość otrzymanych chlebków poddano analizie statystycznej. Wykazała ona korelacje pomiędzy objętością otrzymanych chlebków a: lepkością kleików w temp. 50°C (r = + 0,45), wielkością ziarenek skrobiowych (% ziarenek o wielkości 21,9-30,9 um: r = + 0,44 ), temperatura kleikowania (r = - 0,66) oraz zawartością białka (r = - 0,54 ). Wydaje się więc, że te właściwości fizykochemiczne skrobi w sposób istotny wpływały na objętość chlebków. Nie wykazano istotnej zależności pomiędzy objętością chlebków a: stopniem wiązania wody i rozpuszczalności skrobi pszenżytnej w wodzie, zawartością amylozy oraz zawartością tłuszczu i fosforu w skrobi z pszenżyta.

Źródło:

Acta Alimentaria Polonica; 1988, 14(38), 3-4; 131-138
0137-1495

Pojawia się w:

Acta Alimentaria Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 20.

Tytuł:

Water Quality Index and Human Health Risk Assessment of Class B Swimming Pools in Owerri Municipal, Nigeria

Autorzy:

Ngozi, Verla Evelyn
Nwachukwu, Joseph Ikechukwu
Lydia, Ugwoke Chidera
Wirnkor, Verla Andrew

Powiązania:

https://bibliotekanauki.pl/articles/1839872.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Contaminants
Model
Index
Permissible limit
Physicochemical

Opis:

Assessments of public swimming pools in Owerri municipal, Imo state, Nigeria was carried out for the purpose of determining the suitability of water for swimming in this fun loving town of Nigeria. Five public pools were selected by purposive sampling from more than 30 pools in the area. Water samples were collected in the morning and evening from pools and analyzed in triplicates for physicochemical properties and heavy metals content by using standard method for water analysis and Atomic Absorption Spectrometer. Data obtained were compared with WHO and EPA standards for drinking and recreational water and modeled on the Water Quality Index (WQI). Results revealed that pH ranged from 7.10±0.02 to 8.1±1.27 pH units, EC ranged from 40 ±3.11 µS/cm to 80±3.44 µS/cm, COD value ranged from 0.08±0.07 to 1.02 ±0.91, BOD value ranged from 0.03±0.02 to 3.14±0.13, dissolved oxygen (DO) ranged 3.9±1.77 mg/kg to 9.3±2.41 mg/kg, suspended solids ranged from 6.43±8.21 mg/l to 42.44±7.00 mg/l, total dissolved solids (TDS) ranged from 22±2.90 mg/l to 97.98±8.79 mg/l. The major cations were below the standard. Nitrate ranged from 0.91±0.02 mg/l to 0.96 mg/l, sulphate ranged from 2.34±0.10 mg/l to 2.81±0.11mg/l, phosphate ranged from 0.34±0.02 mg/l to 0.65±0.02 mg/l while chloride ranged from 12.75±1.89 mg/l to 31.89±2.04 mg/l with mean 24.23 mg/l. Except for chloride, all other studied anions were lower than the permissible limit set by WHO/EPA. Concentration of lead (Pb), iron (Fe), Copper (Cu) were also below the permissible limit. The individual WQ indexes showed A (3.32), B (5.44), C (10.08), D (12.40) and E (9.77) with average WQI of 8.20 suggesting that the swimming pools are of “Excellent water quality”, thereby suggesting safe swimming pools for recreational activities in the study area. Values of exposure pathways for all metals at all swimming pools were less than one. Therefore there were no risks of heavy metals from the swimming pools.

Źródło:

World News of Natural Sciences; 2021, 38; 60-82
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 21.

Tytuł:

Characteristics of selected physicochemical indices of upland carbonate stream water with coarse-grained substrate

Autorzy:

Policht-Latawiec, A.
Kanownik, W
Grubka, K

Powiązania:

https://bibliotekanauki.pl/articles/124481.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Sztoła river
water quality
physicochemical indices

Opis:

Hydrochemical research was conducted in 2011 at three measurement-control points on the Sztoła river, a left-bank tributary to the Biała Przemsza river. Water temperature and pH, dissolved oxygen concentration, oxygen saturation and electrolytic conductivity were measured directly in the field. 11 selected physicochemical indices of the Sztoła surface water were assessed in the laboratory. The analysis of the research results revealed that the water of the Sztoła along the analyzed river reach was first class quality. The analysis of water usable qualities proved that at point 1 it can be used for water supply after high-performance physical and chemical treatment, whereas at other points after a typical physical and chemical treatment, due to high manganese concentrations. Water does not meet the requirements of natural habitat for the Salmonoid fish only at point 1 because of exceeded standard values for nitrites. The Cyprinid fish have the proper habitat conditions along the examined river reach. Among 15 analysed physiochemical indices of water, 7 were statistically higher in the lower course, but they did not affect worsening of the Sztoła river water quality. Greater water pollution in the central and lower river reach is caused by the anthropogenic pressure connected mainly with the operations of extraction industry in the catchment.

Źródło:

Journal of Ecological Engineering; 2014, 15, 4; 23-28
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 22.

Tytuł:

Quality traits and physicochemical characteristics of pork from crossbreds depending on age
Cechy jakościowe tusz i właściwości fizykochemiczne mięsa mieszańców świń w zależności od wieku

Autorzy:

Rudy, M.
Zin, J.

Powiązania:

https://bibliotekanauki.pl/articles/2197636.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

pig
crossbred pig
pork quality
pig meat
physicochemical characteristics
animal age
carcass
fattener
chemical composition
physicochemical property
sensory property

Źródło:

Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2007, 25, 1; 101-107
0239-4243
2083-7399

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 23.

Tytuł:

Cyanobacterial species Biodiversity in Mahasamund district of Chhattisgarh region, India

Autorzy:

Sharma, Sangita Devi
Sahu, Kaushilya
Jain, Pankaj Kumar

Powiązania:

https://bibliotekanauki.pl/articles/1118876.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Cyanobacterial screening
Rice fields
physicochemical properties of soil

Opis:

Rice is the principal crop of the Chhattisgarh State. It covers 66% of all cultivable land and is mostly grown within the kharif cropping season. To increase sustained productivity without decreasing soil quality, algal bio fertilizers are widely used in the State. Hence, the culture of cyanobacterial bio fertilizers has been started on a regional basis. This includes survey, isolation and screening of stress-tolerant cyanobacteria. Thus, this study concerns the characterization of physical and chemical properties of soil collected from Mahasamund districts of Chhattisgarh state with respect to the biodiversity of cyanobacteria.

Źródło:

World News of Natural Sciences; 2017, 7; 1-15
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 24.

Tytuł:

Recent studies of irradiated mangoes in Brazil : a trend towards commercial approach

Autorzy:

Sabato, S. F.
Silva, J. M.
Cruz, J. N.
Broisler, P. O.
Rela, P. R.
Salmieri, S.
Lacroix, M.

Powiązania:

https://bibliotekanauki.pl/articles/148822.pdf

Data publikacji:

2008

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

gamma radiation
mangoes
physicochemical properties
sensory evaluation

Opis:

Mango is an important commodity to our country as Brazil is a great producer and exporter of tropical fruits. Nowadays, Mexico and India are the main exporters of mango in the world and Brazil occupies the third position in this ranking. As these countries have adopted gamma radiation as a phytosanitary treatment and signed a bilateral agreement with the United States for exporting mango to this country, Brazil has to be up-to-dated with this trend. The Institute of Nuclear and Energy Researches together with field producers in the northeastern region and partners like the International Atomic Energy Agency, the Canadian Irradiation Center and Empresa Brasileira de Agropecuária joined to demonstrate this technology, its application and its commercial feasibility. The whole project was structured in two parts that involved around 1300 mangoes. The first step consisted mainly in studying the quality of irradiated mangoes within our territory, using a multipurpose semi-commercial cobalt facility, and comparing two harvesting points of the fruits. The second one was an international consignment of irradiated fruits from Brazil to Canada, where the control sample consisted of fruits treated with a hot water dip. The financial part of the feasibility study covers the scope of the investment, including the net working capital and production costs. In a summarized way to express, the results from physicochemical analysis and sensory evaluation were favorable, indicating that gamma radiation is a potential quarantine treatment.

Źródło:

Nukleonika; 2008, 53, suppl. 2; 77-79
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 25.

Tytuł:

Advanced biocomposites based on silica and lignin precursors

Autorzy:

Klapiszewski, Ł.
Nowacka, M.
Szwarc-Rzepka, K.
Jesionowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/110719.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

biocomposites
silica
lignin
physicochemical and structural properties

Opis:

A new method is proposed for obtaining biocomposites based on a combination of silica and lignin precursors. Amorphous silica was produced by two methods: one based on hydrolysis and condensation of tetraethoxysilane (sol–gel method) and the other involving precipitation in a polar medium. Additionally, the commercial silica known under the name of Syloid®244 was used. The silica surface was modified to ensure better affinity of the support to activated lignin. The biocomposites obtained were carefully characterised by determination of their physicochemical and dispersive–morphological properties. Electrokinetic stability of the biocomposites was evaluated on the basis of zeta potential dependence on pH. Thermal stability of the biocomposites and their porous structure parameters (surface area, pore diameter and pore volume) were established. The results indicate that silica/lignin biocomposites are much promising for application in many areas of science and industry.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 497-509
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 26.

Tytuł:

Some applications of barium titanate prepared by different methods

Autorzy:

Sydorchuk, Volodymyr
Khalameida, Svitlana
Skwarek, Ewa
Biedrzycka, Adrianna

Powiązania:

https://bibliotekanauki.pl/articles/2146894.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

barium titanate
synthesis
physicochemical properties
photocatalytic properties

Opis:

The paper presents some application of barium titanate synthesized by different methods. Barium titanate samples were prepared by four procedures: solid state, mechanochemical as direct synthesis and modification as well as hydrothermal and microwave. The obtained samples were systematically studied using X-ray diffraction, nitrogen adsorption, Fourier transform infrared spectroscopy (FTIR), potentiometric titration, and quasi-elastic light scattering and zeta potential measurements. The values of pHpzc (point of zero charge) and pHIEP (isoelectric point) characteristic of the electrical double layer were determined. The prepared samples were tested as photocatalysts under visible light. As a result, relationship between the conditions of barium titanate synthesis, its physicochemical and electrokinetic parameters, as well as photocatalytic activity under visible light was first established.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 2 (Special issue - selected papers conference: Physicochemistry of interfaces - instrumental methods); art. no. 147192
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 27.

Tytuł:

Effect of different methods of treatment of municipal sewage sludge on their physicochemical properties and their agricultural utilization

Autorzy:

Malinowska, E.
Jankowski, K.
Wiśniewska-Kadżajan, B.
Sosnowski, J.
Kolczarek, R.

Powiązania:

https://bibliotekanauki.pl/articles/123934.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

municipal sewage sludge
physicochemical properties
agricultural utilization

Opis:

In the study the physicochemical properties of selected municipal sewage sludge were compared using the reports on waste generation from the years 2007–2012 in the Mazovia voivodship. The selection was done on the basis of different methods of sludge processing and the number of equivalent inhabitants (NEJ) supported by sewage. Physical and chemical properties of municipal sewage sludge were significantly dependent on the method of purification and treatment methods. These sludges were characterized by a high content of organic matter and macronutrients. The amount of heavy metals (Pb, Cd, Cr, Cu, Ni, Hg and Zn) were within acceptable standards for municipal sewage sludge used in agriculture. Municipal sewage sludge treated by biological method with higher nutrients removal did not create bacteriological danger and were used in agriculture, generally to the cultivation of all agricultural products. Sewage sludge sanitized with lime and subjected to anaerobic digestion did not meet bacteriological standards, which eliminated their use in agriculture.

Źródło:

Journal of Ecological Engineering; 2015, 16, 2; 76-81
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 28.

Tytuł:

Seasonal Variability of Physicochemical Parameters of Water Quality on Length of Uszwica River

Autorzy:

Bogdał, A.
Kowalik, T.
Ostrowski, K.
Skowron, P.

Powiązania:

https://bibliotekanauki.pl/articles/124285.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

ecological potential
water pollution
physicochemical indices
eutrophication

Opis:

The Uszwica river catchment is located in the central part of Lesser Poland province, within Brzeski and Bocheński districts. The river is 61.2 km long, and its catchment area is 322.5 km². It is characterized by forest-agricultural land use and high share of residential areas of both compact (the city of Brzesko) and dispersed nature. In the abiotic terms, the Uszwica in its upper course may be classified as a flysch stream (type 12). From the moment of joining the Niedźwiedź, stream until its discharge into the Vistula at km 151+700 it is a sand and clay lowland river (type 19). Hydrochemical research were conducted in the years 2011 and 2012 at two measurement-control points – one located near the mouth of the river (point 1) and one located about 7.5 km downstream from the city of Brzesko (point 2). Each month 18 water quality parameters were determined and they underwent comparative and statistical analyses. Basic descriptive statistics were calculated for both measurement-control points. Then, they were used to determine the ecological potential of the river and to evaluate water quality parameters with respect to its suitability as fish habitat and eutrophication risk. Significance of differences between the values of individual parameters recorded at different measurement-control points was estimated using non-parametric Mann-Whitney U test for α = 0.05. The same test was used to determine the significance of differences between individual parameters for the winter and summer season at each point. Analysis of the results revealed that water flowing via developed areas (point 2) was significantly less saturated with oxygen and contained higher amounts of suspended solids, organic matter and nutrients, as compared to the section of the river flowing mainly through extensively used agricultural areas. Therefore, the ecological potential of the river was considered good in its lower course and poor upstream from point 2. Disturbances in seasonal concentrations of some biogenic factors indicated high degree of water pollution in the middle course of the Uszwica. However, due to intense self-purification, water quality in the lower course was similar to that in natural conditions. On the entire investigated section of the Uszwica does not meet water quality requirements for salmonids and cyprinids, but the habitats are more favorable near the mouth of the river. Waterassessed at point 2 may be classified as eutrophic due to high concentration of total phosphorus.

Źródło:

Journal of Ecological Engineering; 2016, 17, 1; 161-170
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 29.

Tytuł:

Optimization of the Operation of a Municipal Wastewater Treatment Plant with Hydrocotyle ranunculoides

Autorzy:

Quispe, Rebeca
Soto, Mishel
Ingaruca, Ever
Bulege, Wilfredo
Custodio, María

Powiązania:

https://bibliotekanauki.pl/articles/124846.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

treatment plant
macrophyte
physicochemical parameters
thermotolerant coliforms

Opis:

The objective of the study was to optimize the operation of the municipal wastewater treatment plant (WWTP) of the Sicaya district with Hydrocotyle ranunculoides. The relative growth rate of the macrophyte was determined, in addition to the relationship between the population growth area and the final weight according to the number of days elapsed. Medium fences were implemented and the tributary and effluent of the WWTP were characterized physicochemically and microbiologically. The results of the characterization corresponding to the tributary were as follows: 616 mg of TSS/L, 109.2 mg of BOD₅/L, 305.4 mg of COD/L, 30.3 mg of oils and fats/L and 3 500 000 NMP of thermotolerant coliforms/100 ml. Owing to the implementation of two medium grids, large suspended solids were retained. The highest efficiency of COD removal with respect to the growth area of H. ranunculoides (2 226.96 m²) was 81.53%. While the efficiency of removal of thermotolerant coliforms was 79.2% at a water temperature of 12.32°C . Using the operational optimization model in the WWTP with H. ranunculoides, an area of 3 291.67 m² of macrophyte population growth was achieved with a removal efficiency of 93.71% COD and an area of 3 591.67m² to remove 79.95% of the thermotolerant coliforms at a temperature of 13°C.

Źródło:

Journal of Ecological Engineering; 2019, 20, 9; 228-236
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 30.

Tytuł:

The effect of variety and environment factors on physico-chemical properties of potato starch

Autorzy:

Kolodziej, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1371711.pdf

Data publikacji:

1993

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

physicochemical property
starch
environmental factor
potato starch

Źródło:

Polish Journal of Food and Nutrition Sciences; 1993, 02, 2; 43-49
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 31.

Tytuł:

Monitoring właściwości fizykochemicznych odpadów wydobywczych pochodzących z Kopalni Węgla Kamiennego LW „Bogdanka”
Monitoring of the physicochemical composition of the mine wastes from the LW “Bogdanka” Hard Coal Mine

Autorzy:

Bzowski, Z.
Dawidowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/372332.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

odpady wydobywcze
monitoring
skład fizykochemiczny
mine wastes
physicochemical composition

Opis:

W pracy przedstawiono charakterystykę fizykochemiczną odpadów wydobywczych z kopalni węgla kamiennego LW „Bogdanka”. Zaprezentowano wyniki prowadzonego od 1996 roku monitoringu składu chemicznego, zawartości zanieczyszczeń metalami oraz stężeń naturalnych radionuklidów. Stwierdzono, że monitorowane właściwości fizykochemiczne tych odpadów pozwalają na ich wykorzystanie jako materiału mineralnego na powierzchni ziemi w szeroko rozumianych pracach niwelacyjnych, także do prewencyjnej na terenach osiadań.
In the paper the physicochemical characterization of the mine wastes from the LW “Bogdanka” hard coal mine is presented. Results of the monitoring, carried out since 1996, cover the chemical composition, abundances of contaminations by metals as well as the concentration of natural radionuclides. It was determined that the monitored physicochemical parameters of the wastes allow their utilization as a mineral material for a vast majority of leveling works, including the prevention against mining subsidence.

Źródło:

Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2013, 149 (29); 87-96
1895-7323

Pojawia się w:

Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 32.

Tytuł:

Effect of electron radiation on sugar content in inverted liquid sugar

Autorzy:

Podadera, P.
Sabato, S. F.

Powiązania:

https://bibliotekanauki.pl/articles/148037.pdf

Data publikacji:

2009

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

electron beam
ionizing radiation
inverted liquid sugar
physicochemical properties

Opis:

Inverted liquid sugar is a mixture of sucrose, glucose and fructose, which shows its relevant characteristic on high sweetness power. Ionizing radiation has been applied to different kind of food and ingredients for different reasons, such as pathogens reduction, disinfestations, quarantine purposes, ripening delay among others. Radiation from an electron beam can be utilized as a technique to treat this ingredient because it can process a great volume of material per unit of time. The main goal of this paper was to verify the effect of radiation on the properties of inverted liquid sugar. This ingredient was irradiated in an electron accelerator (Radiation Dynamics) at a dose ranging from 5 to 50 kGy. Sucrose content measurements were reduced by 23% at 30 kGy when compared to control and the reduced sugar content increased around 11%. Density and moisture values were not affected by radiation. The total soluble solids (Brix degrees) rose in function of the absorbed dose.

Źródło:

Nukleonika; 2009, 54, 2; 85-87
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 33.

Tytuł:

Analysis of some heavy metals and physicochemical parameters of textile sludge sample in the Bahir Dar textile industry, Northern Amhara, Ethiopia

Autorzy:

Talema, Alemu
Abebaw, Alemayehu
Getahun, Addisu

Powiązania:

https://bibliotekanauki.pl/articles/1046523.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

FAAS
Textile sludge
contaminated soil
heavy metals
physicochemical parameters

Opis:

The present study was conducted to characterize the solid sludge from the Bahir Dar textile industry.The concentration of heavy metals (Cr, Cd, Zn, Fe, Pb, Cu and Mn) in the samples were found to be 37.433-50.967, ND, 244.8-279.9, 2868.633-2886.667, 4.567-7.83, 242.767-282.133 and 160.9-212.8 (mg/Kg) respectively. The range of the pH, EC (%), OM (%), OC (%), MC (%), VS (%) and FS (%) in the sludge samples were found to be in the ranges of 7.317-7.771, 1.466-1.872, 12.302-12.778, 7.136-7.412, 9.211-11.576, 44.598-47.778 and 52.222-55.402 respectively. The results of the heavy metals in the textile sludge sample showed that the concentration levels of Cu metal was above the standard guide lines for maximum limit proposed for agricultural soil set by FAO /WHO and in the case of other metals (Pb, Zn, Mn, Fe, Cr), their concentration levels were found below the standard guide lines for maximum limit proposed for agriculture soil set by this organization, but the concentration levels of Cd was not detected in this present study. Finally, the study concluded that pre-treatment process for reducing the amount of some heavy metal is mandatory before the sludge can be used as a soil conditioner / fertilizer in the agricultural soil.

Źródło:

World Scientific News; 2019, 136; 33-51
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 34.

Tytuł:

Perspectives from literature on the influence of inorganic electrolytes present in plant water on flotation performance

Autorzy:

Manono, M. S.
Corin, K.
Wiese, J.

Powiązania:

https://bibliotekanauki.pl/articles/110721.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

electrolytes
flotation reagents
froth stability
physicochemical interaction
water quality

Opis:

The interaction of inorganic electrolytes with reagents in the flotation of sulphidic PGM bearing ores is not well explored. It has been shown that specific inorganic electrolytes such as Ca2+ and SO42- can affect the wettability of gangue minerals. These could also hinder the adsorption of collectors onto valuable minerals and concurrently enhance or retard froth stability. This presents a challenge as regards understanding what the overarching or controlling mechanisms of interaction between electrolytes, reagents and minerals are as well as predicting how flotation performance will be affected. This review shows that studies in literature have simplified the question of electrolyte-reagent-mineral interactions and that current approaches have not provided fundamental solutions to the challenge of water quality. It is proposed that the complexity of the flotation system requires an in-depth knowledge of the individual electrolyte-reagent-mineral interactions so as to establish whether there are any dominant or synergistic interactions. Such in-depth knowledge should enable the development of pulp chemistry control measures against water quality variations in flotation.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1191-1214
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 35.

Tytuł:

Drying Kinetics, Physicochemical Properties and Sensory Quality of the Instant Foxtail Millet as Affected by Drying Methods

Autorzy:

Wang, Yingqiang
Zhao, Hongxia
Song, Xi
Zhang, Wenjie
Yang, Feng

Powiązania:

https://bibliotekanauki.pl/articles/2019405.pdf

Data publikacji:

2022-03-01

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

instant foxtail millet
drying kinetics
physicochemical properties
sensory quality

Opis:

The instant foxtail millet was prepared using microwave vacuum drying (MVD), microwave-hot air drying (MHAD), hot air drying (HAD) and traditional roasting (TR). Their effects on drying kinetics, physicochemical properties as well as sensory quality were evaluated and compared. Results showed that the total drying time varied with the drying method used and was about 160, 100, 260, and 45 min for MVD, MHAD, HAD and TR, respectively. The effective moisture diffusion coefficients (Deff) were 6.57×10-9 m2/s, 9.80×10-9 m2/s, 4.14×10-9 m2/s and 6.20×10-9 m2/s for MVD, MHAD, HAD and TR, respectively. Drying resulted in a significant decrease in L* and an increase in a* and b* of the color of products. MVD, MHAD and HAD products had a comparable rehydration ratio and cooking time. Scanning electron microscopy and rehydration process revealed that MHAD and MVD samples had a similar structure with the HAD sample. Drying caused a loss of 6.5–54.9% in the total phenolic content and a loss of 38.4–62.2% in total yellow pigment content. MVD millet displayed the highest total phenolic content (142.56 mg GAE/100 g dry matter) and yellow pigment content (9.56 mg CE/kg dry matter). In sensory evaluation, MHAD, HAD and MVD samples had comparable scores and were all accepted by the panelists, either in dry or rehydrated form. MHAD and MVD can be used as an alternative to hot air drying or traditional roasting in the production of the instant millet due to shorter drying time and better product quality.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2022, 72, 1; 69-78
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 36.

Tytuł:

Physicochemical properties of chitin isolated from shell of industrial crabs of various species

Autorzy:

Sorokoumov, Ivan
Zagorskiy, Ivan
Zagorskaya, Darya
Uryash, Vladimir
Kokurina, Nadezhda
Larina, Vera
Nemtsev, Sergei

Powiązania:

https://bibliotekanauki.pl/articles/1035553.pdf

Data publikacji:

2010

Wydawca:

Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe

Tematy:

chitin
industrial crabs of various species
physicochemical properties
shell

Opis:

Differential thermal analysis was carried out over the range of –190 ÷ 400 °С on six samples of chitin from shells of industrial crabs of various species. All samples of the chitin have several relaxation transitions of endothermal character (g1-, g2-, β- and γ-).

Źródło:

Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 5-10
1896-5644

Pojawia się w:

Progress on Chemistry and Application of Chitin and its Derivatives

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 37.

Tytuł:

Determination of Water Quality Index of Selected Water Bodies in Warri, Delta State, Nigeria

Autorzy:

Ama, Ibiam Ntachiobi
Ebichime, Nwajei Godwin
Agbaire, Patience Odafe
Verla, Andrew Wirnkor

Powiązania:

https://bibliotekanauki.pl/articles/1112889.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

arithmetic index
physicochemical parameter
water quality index (WQI)

Opis:

Water Quality index indicating the water quality in terms of index number, offers a useful representation of overall quality of water for public or for any intended use, as well as in pollution abatement programmes and in water quality management. The present study was carried out to determine the Water Quality Index (WQI) of selected rivers in Warri, Delta State, using fourteen physicochemical parameters and on the basis of weighted Arithmetic Index in order to access the suitability of this water for consumption, recreation and other purposes. The parameters were measured monthly for one year at the six selected water bodies. In this study, WQI was determined by the analysis-on the basis of various physicochemical parameters such as pH, chlorides, electrical conductivity, dissolved oxygen, biochemical oxygen demand, total dissolved solid, total suspended solids, chlorides, sulphates, chemical oxygen demand, oil/grease. Result obtained for the different sampling sites were found to fall within the WQI classifications - poor water (100-200) to unsuitable water or unfit (>300). There is, therefore, the need to periodically assess these water bodies to ensure the quality is suitable for the intended purpose.

Źródło:

World News of Natural Sciences; 2018, 16; 42-52
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 38.

Tytuł:

Evaluation of Selected Physicochemical Indicators of the Waters of Rudnickie Wielkie Lake after Reclamation
Ocena wybranych wskaźników fizyko-chemicznych wód jeziora Rudnickiego Wielkiego po rekultywacji

Autorzy:

Berleć, Krzysztof
Budzińska, Katarzyna
Michalska, Magdalena

Powiązania:

https://bibliotekanauki.pl/articles/1811727.pdf

Data publikacji:

2020

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

reclamation
lake
physicochemical indicators
rekultywacja
jezioro
wskaźniki fizykochemiczne

Opis:

The research carried out was aimed at determining the effectiveness of reclamation of the Rudnickie Wielkie lake. Samples were taken 7-fold in 3 places during the period from October to April. In the tested water was determined by the colorimetric method PO4-3 ions, total P and N, nitrate(V), nitrite(III) and NH4 -N. Additionally, the pH and temperature. The temperature and pH of water analyzed in the course of the study were at the level characteristic for the seasons under study and did not have a significant impact on the content of the determined chemical indicators. The level of biogenic elements and their compounds, determined a few years after reclamation, is higher than the results obtained in 2001 (immediately after reclamation), which may indicate improper sewage and agricultural management in the lake's basin.
Przeprowadzone badania miały na celu określenie skuteczności rekultywacji jeziora Rudnickiego Wielkiego. Próbki pobierano 7-krotnie w 3 miejscach w okresie od października do kwietnia. W badanej wodzie oznaczono metodą kolorymetryczną PO4-3 ions, całkowitą P i N, azotan (V), azotyn (III) i NH4 -N. Dodatkowo pH i temperatura. Temperatura i pH wody analizowanej w trakcie badania były na poziomie charakterystycznym dla badanych sezonów i nie miały istotnego wpływu na zawartość określonych wskaźników chemicznych. Poziom pierwiastków biogennych i ich związków, określony kilka lat po rekultywacji, jest wyższy niż wyniki uzyskane w 2001 r. (Bezpośrednio po rekultywacji), co może wskazywać na niewłaściwe gospodarowanie ściekami i rolnictwem w dorzeczu jeziora.

Źródło:

Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 2; 984-997
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 39.

Tytuł:

Przestrzenna zmienność parametrów fizykochemicznych gruntów z terenów silnie zasolonych
Spatial Variability of Physicochemical Parameters of Soil in Highly Saline AreasKey words

Autorzy:

Gliniak, M.
Sobczyk, W.
Wielewska, I.

Powiązania:

https://bibliotekanauki.pl/articles/1817954.pdf

Data publikacji:

2016

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

KZS Solvay
zasolenie
parametry fizykochemiczne
salinity
physicochemical parameters

Opis:

Ważnym źródłem antropogenicznych zanieczyszczeń środowiska solami jest przemysł sodowy. Składowiska odpadów poprodukcyjnych, lokalizowane obok zakładów, negatywnie wpływają na otaczające środowisko, gdyż wody opadowe wymywają z nich szkodliwe substancje. Celem niniejszego artykułu jest ocena przestrzennego zróżnicowania wybranych parametrów fizykochemicznych osadów na terenie składowisk dawnych Krakowskich Zakładów Sodowych „Solvay”. Na podstawie analizy granulometrycznej stwierdzono występowanie naprzemianległych warstw o uziarnieniu ilastym i różnym stopniu konsolidacji odpadów. Badania laboratoryjne wskazują, iż analizowany osad charakteryzuje się odczynem silnie alkalicznym (średnie pH > 10), wysoką przewodnością elektryczną właściwą (średnio > 10 mS cm-1) i średnią wilgotnością aktualną na poziomie 60%. Stwierdzono obecność jonów o charakterze zasadowym, łatwo rozpuszczalnych w wodzie opadowej, które mają zdolność do akumulacji w głębszych warstwach składowisk. Występowanie tych jonów w próbkach gruntu stwarza warunki stresowe dla wzrostu i rozwoju roślin głęboko korzeniących się, toteż w projektach zieleni bardzo ważnym aspektem jest uwzględnienie gatunków roślin o płytkim systemie korzeniowym i wysokiej odporności na silne zasolenie podłoża. Charakterystyczne parametry fizykochemiczne podłoża i niejednorodność składowanego materiału stanowią podstawę do przeprowadzenia technicznej i biologicznej rekultywacji badanego obszaru i mają duże znaczenie w projektowaniu jego funkcji przestrzennych.
An important source of anthropogenic environment pollution with salts is the sodium industry. Post-production waste dumping grounds, located near the plants, have a negative impact on the surrounding environment because rain water scours harmful substances from them. The aim of this article is to assess the spatial variability of selected physicochemical parameters of soil on the premises of former Sodium Processing Plant “Solvay” in Kraków. The laboratory research showed that the analyzed material has a strong alkaline reaction (average pH > 10), high electric conductivity (average > 10 mS·cm-1) and medium humidity of 60%. There are also ions of alkaline reaction, easily soluble in rain water, which have the ability to accumulate in the deeper layers of the dumping grounds. The existence of those ions in the ground samples creates very stressful conditions for the growth and development of long-rooted plants, therefore it is important in greenery design to include such species of plants that have a shallow root system and are resistant to high salinity of the soil. The characteristic physicochemical parameters of the ground as well as the heterogeneity of the stored material constitute a basis for technological and biological reclamation of the studied area and have large significance in designing its spatial functions.

Źródło:

Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 1; 372-386
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 40.

Tytuł:

Fizykochemiczne właściwości miodów pszczelich jako kryteria ich autentyczności
Physicochemical properties of honey as criteria of their authenticity

Autorzy:

Majewska, E.
Delmanowicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/2070111.pdf

Data publikacji:

2009

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

miód
właściwości fizykochemiczne
autentyczność
honey
physicochemical properties
authenticity

Opis:

Sprawdzono możliwości określania autentyczności miodów nektarowych przy zastosowaniu parametrów fizykochemicznych. Do badań wybrano siedem odmian miodów. Uzyskane wyniki pozwoliły stwierdzić, iż określenie niektórych parametrów fizykochemicznych, tj. zawartości cukrów redukujących. HMF. proliny, popiołu oraz przewodności elektrycznej właściwej, może być pomocne przy wykrywaniu zafałszowali.
The aim of this paper was to check the possibility of flural honey authenticity verification using physical and chemical parameters. Seven different floral honey variations were selected for tests. The outcomes confirmed the assumption that determination of some parameters, such as content of glucose and fructose. HMF, proline. ash or electrical conductivity can he helpful in adulteration finding.

Źródło:

Inżynieria i Aparatura Chemiczna; 2009, 1; 36-37
0368-0827

Pojawia się w:

Inżynieria i Aparatura Chemiczna

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 41.

Tytuł:

Właściwości fizyko-chemiczne tkanki mięśniowej po sonifikacji
Physicochemical properties of muscular tissue after sonification

Autorzy:

Dolatowski, Z. J.
Twarda, J.

Powiązania:

https://bibliotekanauki.pl/articles/291312.pdf

Data publikacji:

2005

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

wołowina
właściwości fizykochemiczne
sonifikacja
beef
physicochemical properties
sonification

Opis:

Celem badań była ocena zjawisk o charakterze pierwotnym wywołanych sonifikacją wołowej tkanki mięśniowej bezpośrednio po uboju oraz po 24 godz. od uboju. Zakres badań obejmował oznaczenie wodochłonności, kwasowości mięsa i zdolności utrzymywania wody własnej. Otrzymane wyniki oznaczeń właściwości fizyko - chemicznych mięsa "ciepłego" przeprowadzonych bezpośrednio po zastosowaniu obróbki ultradźwiękowej wskazują na brak bezpośrednich efektów oddziaływania drgań na badane cechy. Aplikacja drgań w przypadku mięśni w stanie rigor mortis (tj. po 24 godz. od uboju) wpłynęła różnicująco na zdolność utrzymywania przez nie wody własnej.
It was the subject of this work to evaluate phenomena original in character generated by sonification of beef muscular tissue directly after slaughter and 24 hours after slaughter. The scope of investigation included the determination of water absorption, meat acidity, and moisture-holding capacity. It results from the determination of the physico-chemical properties of "warm" meat carried out directly after ultrasonic treatment that the features being tested were not directly affected by vibration. The application of the vibration in case of muscles in a state rigor mortis (i.e. 24 hours after slaughter) had a different effect on their moisture-holding capacity.

Źródło:

Inżynieria Rolnicza; 2005, R. 9, nr 9, 9; 77-83
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 42.

Tytuł:

Badanie wybranych własności żeli pod prysznic i płynów do kąpieli w zależności od zastosowanych surfaktantów
The study of the selected properties of shower gels and bubble baths depending on a kind of a used surfactants

Autorzy:

Kowalik, P.
Szyrej, M.

Powiązania:

https://bibliotekanauki.pl/articles/410339.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

kosmetyki
surfaktanty
właściwości fizykochemiczne
cosmetics
surfactants
physicochemical properties

Opis:

W pracy dokonano oceny jakości żeli pod prysznic i płynów do kąpieli o różnym składzie ZPC, na podstawie wybranych właściwości fizykochemicznych, samych kosmetyków lub ich roztworów, tj. pH, roztwarzalność, zdolność emulgowania tłuszczu, pianotwórczość, napięcie powierzchniowe. Wśród badanych żeli pod prysznic najskuteczniejsze okazały się trzy produkty tj. żel „Silver protect” (Nivea), „Magnolia mit Magnolien-Extrakt” (Dusch das) i żel „Senses Sensual Mystique” (Avon). Spośród wszystkich badanych płynów do kąpieli, najlepszymi własnościami myjącymi charakteryzuje się „Ziajka” (Ziaja), płyn przeznaczony do kąpieli dla dzieci po pierwszym roku życia. Preparaty te są bezpieczne dla skóry, bardzo dobrze roztwarzają się w wodzie, charakteryzują się bardzo dobrymi właściwościami pianotwórczymi, zdolnościami emulgacji tłuszczu i obniżania napięcia powierzchniowego.
Cosmetics are substances that have daily, direct contact with the human body, which is why it is extremely important to control their quality and safety. The group washing cosmetics includes shower gels and bubble baths, whose function is to clean the skin. Their main component, due to the utility properties, are surfactants. The quality of washing cosmetics is directly related to the type used surfactants, since some of them may cause skin dryness and skin irritation and even allergic reactions. The aim of study is estimation of the quality of shower gels and bubble baths of different surfactants composition, based on selected physicochemical properties as cosmetics or their solutions, i.e. pH, solubility, the ability to emulsify fat, foaming capacity, surface tension. Among the examined cosmetics, shower gels proved to be the most effective three products, i.e. gel “Silver protect” (Nivea), a gel “Magnolia myth Magnolien-Extrakt” (Dusch Das) and gel “Senses Sensual Mystique” (Avon). Of all the examined bubble baths, the best cleansing properties characterized by “Ziajka” (Ziaja), designed for children after the first year of life. These cosmetics are safe for the skin, very well soluble in water and has very good properties foaming, emulsification capacity of fat and lowering the surface tension.

Źródło:

Chemistry, Environment, Biotechnology; 2016, 19; 53-64
2083-7097

Pojawia się w:

Chemistry, Environment, Biotechnology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 43.

Tytuł:

Physico-Chemical Characterization of an Urban Wastewater Effluent and its Impact on the Receiving Environment: Oued Nfifikh (Morocco)

Autorzy:

Merbouh, Chaimaa
Namoussi, Soukaina
Kabriti, Mohamed
Naamane, Ayoub
Rihane, Abdeslam
Iounes, Nadia

Powiązania:

https://bibliotekanauki.pl/articles/2068481.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Oued Nfifikh
water stream
wastewater
physicochemical quality
pollution

Opis:

Oued Nfifikh is among the least studied Moroccan rivers. Thus, the primary aim of this study was to shed light on the quality of this undervalued stream. Its downstream part is affected by one of the most crucial environmental issues. It receives the discharges of wastewater evacuated precariously without prior treatment, which might lead to the degradation of the overall ecological status of this fluvial hydrosystem. This research work aimed to study the physicochemical water quality downstream the river Nfifikh through a monthly monitoring of the physicochemical parameters’ indicator of pollution, from August 2018 to July 2019. The results obtained show that the stream is exposed to high pollution which is mainly organic. Consequently, the wastewater represents a major cause of water quality degradation of this receiving environment: ecological and health impacts are therefore to be expected.

Źródło:

Journal of Ecological Engineering; 2022, 23, 3; 183--193
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 44.

Tytuł:

The Impact of Anthropopressure on Physicochemical State of the Korzkiewka Stream

Autorzy:

Policht-Latawiec, A.
Kanownik, W.

Powiązania:

https://bibliotekanauki.pl/articles/123589.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

water quality
anthropogenic factors
physicochemical indices
Korzkiewka stream

Opis:

The aim of the paper was the identification and assessment of the area of anthropogenic impacts on water quality in the catchment of the Korzkiewka stream flowing through the areas of the Malopolska region. Analyses of physicochemical indices revealed that waters along the whole length of the stream qualified for below good status due to the exceeded EC and nitrate nitrogen concentrations. It was found that among 21 analyzed physicochemical indices, statistically significant differences occurred for 5: total dissolved solids, SO₄^2-., Mg²⁺, K⁺ and water pH. In the headwaters section values of four salinity indices were significantly higher in relation to the other part of the stream. Assessment of anthropogenic factors affecting the catchment water resources conducted on the basis of unitary and percent indices revealed that the dominant category shaping the physicochemical status of the Korzkiewka stream water is municipal economy. The intensity of the influence of the factors from this category was from medium to very high, while in case of sewage discharged through the sewage network, even to outlier intensity. Forestry and agriculture exerted medium pressure, whereas the factors from the industry category had hardly any influence on water in the stream.

Źródło:

Journal of Ecological Engineering; 2017, 18, 5; 199-208
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 45.

Tytuł:

Physicochemical Analysis of the Water Wells in the Area of Kosovo Energetic Corporation (Obiliq, Kosovo)

Autorzy:

Demaku, Skender
Bajraktari, Naser

Powiązania:

https://bibliotekanauki.pl/articles/124197.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Kosovo Energetic Corporation
wells
physicochemical parameters
heavy metals

Opis:

The authors analyzed the physicochemical parameters and heavy metals characterizing the wells at three different sites (nearby villages) in the area of KEC (Kosovo Energetic Corporation). The KEC power plants are the only ones in Kosovo that use fossil-fueled energy (lignite) for the production of the electricity. This process may pollute the environment through the release of airborne aerosols (contaminated with metals), ash (a part of its content that leaches in the underground waters), etc. This pollutes air, surface water, groundwater and soil. In addition, the coal exploitation activity as raw material for power plants, excavating from mining basins, conveyor belt transport, separation before combustion and other processes involving the formation of dust sources and coal particles in the air also contribute to the pollution. Thus, it is of utmost importance to evaluate the water quality of the wells that are used as drinkable water sources by the people that live in this industrial area.

Źródło:

Journal of Ecological Engineering; 2019, 20, 7; 155-160
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 46.

Tytuł:

Variability of physicochemical properties of water of the transboundary Poprad river

Autorzy:

Policht-Latawiec, A.
Bogdał, A.
Kanownik, W.
Kowalik, T.
Ostrowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/124315.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Poprad river
physicochemical indices
ecological state
water pollution

Opis:

The results of five-year (2008–2012) hydrochemical research of the Poprad river, the right bank tributary to the Dunajec, were analyzed in the paper. The Poprad, 167 km long and with the catchment area of 2077.3 km², flows for over 100 km through the territory of Slovakia, along the length of 31.1 km is a transboundary river, whereas its 31.0 km long reach is situated in Poland. Concerning its abiotic character, it is an eastern upland river of type 15. The research was conducted in three measurement-control points: 1) located in Leluchów on the Polish-Slovak border at 61.1 kilometer of the river course, 2) in Piwniczna-Zdrój – 23.9 km and 3) in Stary Sącz – 2.9 km before the Poprad outlet to the Dunajec. 21 physicochemical indices and 2 microbiological indicators were assessed in the water samples once a month using referential methods. The paper assesses changes of water quality classes and its usable values along the analyzed Poprad river reach. Moreover, statistical differences between the values of individual indices assessed in various measurement-control points were estimated by means of Mann-Whitney U nonparametric test. On the basis of the conducted analyses of the empirical data it was stated that due to the physicochemical indices, water quality along the whole length of the analyzed river reach was good (class II) – in points 1 and 3 it was determined by mean concentration of total suspended solids, whereas in point 2 COD-Mn values.

Źródło:

Journal of Ecological Engineering; 2015, 16, 1; 100-109
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 47.

Tytuł:

Starches Modified by Combination of Phosphorylation and High-Voltage Electrical Discharge (HVED) Treatment

Autorzy:

Grgić, Ivanka
Grec, Marijana
Gryszkin, Artur
Zięba, Tomasz
Kopjar, Mirela
Ačkar, Đurđica
Jozinović, Antun
Miličević, Borislav
Zavadlav, Sandra
Babić, Jurislav

Powiązania:

https://bibliotekanauki.pl/articles/1363283.pdf

Data publikacji:

2021

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

cereal starch
tuber starch
HVED
phosphorylation
physicochemical properties

Opis:

Starch is extensively used in the food industry as a texture modifier, a fat substitute, and in other applications. To optimise starch functional properties for specific use, it is subjected to various modifications. High-voltage electrical discharge (HVED) treatment, as a non-thermal and rapid process, was applied in this research as a single method and in combination with phosphorylation in order to explore its potential for improving starch physicochemical properties. Maize, wheat, potato, and tapioca starches were modified, and Na5P3O10 and Na2HPO4 were used for phosphorylation. Starch gelatinisation parameters (by DSC); paste clarity; and contents of amylose, damaged starch, and resistant starch were determined; and FTIR-ATR spectra were recorded. All modifications reduced the enthalpy of gelatinisation and decreased contents of amylose, resistant starch, and damaged starch. The effect of the HVED treatment on starch properties depended on starch type and combinations with chemicals. HVED could act as an aid in the starch phosphorylation process since the properties analysed were more effectively improved when HVED was combined with phosphorylation than by phosphorylation alone.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2021, 71, 1; 79-88
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 48.

Tytuł:

Physicochemical properties of defatted Triticale starch

Autorzy:

Gambus, H
Nowotna, A.

Powiązania:

https://bibliotekanauki.pl/articles/1371364.pdf

Data publikacji:

1992

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

defatted starch
physicochemical property
starch
wheat industry
Triticale

Źródło:

Polish Journal of Food and Nutrition Sciences; 1992, 01, 2; 101-107
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 49.

Tytuł:

Performance of pozzolan in trickling filter for secondary treatment of urban wastewater in Tlemcen, Algeria

Autorzy:

Hamidi, Amina
Belarbi, Fadila
Bouchelkia, Hamid
Bouchenak Khelladi, Racha M.

Powiązania:

https://bibliotekanauki.pl/articles/2174349.pdf

Data publikacji:

2022

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

physicochemical parameters
pollution
pozzolan
trickling filter
wastewater treatment

Opis:

The research aims to study the purification performance of a local and natural material as an input or as a biological filter for treating urban domestic wastewater. For this purpose, pozzolan was used as the biofiltration support that was provided from Beni Saf located in the North-West of Algeria. Tests were carried out with a specially modified pilot unit (TE900) for wastewater treatment over a period of four months. To assess the efficiency of the treatment, two main parameters have been focused on - the height of the sprinkler filter (40 cm and 80 cm) and the flow rate (10, 16, and 25 dm3∙h-1). Physicochemical and bacteriological analyses were carried out on raw wastewater and treated water. The obtained results show that the Beni Saf pozzolan-filled trickling filter eliminates a large fraction of the studied pollutants. The purification yields obtained are fairly encouraging; 98% for turbidity, 88% for suspended solids (SS), 94% for chemical oxygen demand (COD), and 98% for biological oxygen demand (BOD5 ). As for bacterial indicators, the formation of biofilms has significantly reduced bacterial activity with a percentage of over 80%. It can be concluded that the reduction of pollutant parameters clearly indicates the effectiveness of the treatment by this ecological process. Therefore, the use of local and natural materials for wastewater treatment can be a promising alternative based on sustainable environmental technologies and development.

Źródło:

Journal of Water and Land Development; 2022, 55; 166--177
1429-7426
2083-4535

Pojawia się w:

Journal of Water and Land Development

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 50.

Tytuł:

Physicochemical properties determining the cooking time of pea (Pisum sativum L.) seeds.

Autorzy:

Prusiński, Janusz
Strychalska, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/2199100.pdf

Data publikacji:

2007-06-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

cooking time
pea cultivars
physicochemical properties of seeds

Opis:

Undamaged pea seeds of Agra, Wenus, Kwestor, Bursztyn, Rola, Turkus, Set, Kujawski and Ramrod cultivars divided into 3 size fractions were evaluated for physicochemical properties, the rate of fresh weight increments, leachate electroconductivity as well as cooking time. In Kujawski, Turkus, Bursztyn and Ramrod cultivars or in the case of small seeds, the mean fresh weight increments during seed incubation in water were greater, while in Set and in the case of large seeds, the increments were smaller.

Źródło:

Plant Breeding and Seed Science; 2007, 55; 19-30
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 51.

Tytuł:

Analiza właściwości fizykochemicznych depozytów mułów węglowych na Górnym Śląsku
Investigation of the physicochemical properties of coal slurries

Autorzy:

Lutyński, A.
Szpyrka, J.

Powiązania:

https://bibliotekanauki.pl/articles/283611.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Tematy:

właściwości fizykochemiczne
depozyty mułów węglowych
physicochemical properties
coal slurry impoundments

Opis:

W opracowaniu przedstawiono wyniki badań wybranych właściwości fizycznych, chemicznych i energetycznych mułów węgla energetycznego i koksowego z dwudziestu depozytowych stawów osadowych. Zaprezentowane wyniki to oznaczenia składu chemicznego oraz zawartości wilgoci, części lotnych, siarki i wartości opałowej w różnych stanach. Podano też wyniki badań właściwości mułów w klasie ziarnowej poniżej 0,1 mm. Uzyskane w badaniach wyniki oznaczeń wybranych podstawowych parametrów składu chemicznego wykazały, ze muły mają skład chemiczny typowy dla odpadów drobnoziarnistych tego rodzaju. Odstępstwem od znanych z literatury wartości jest bardzo niska zawartość Al2O3 i TiO2 . Średnia wartość opałowa w stanie analitycznym w mułach zdeponowanych w poszczególnych osadnikach waha się w granicach od 9265 do 23 293 kJ/kg. Średnia zawartość popiołu w stanie analitycznym waha się w granicach od 26,98 do 63,96%, Średnia zawartość siarki całkowitej w stanie analitycznym waha się w granicach od 0,57 do 2,98%, średnia zawartość wilgoci przemijającej w odpadach mieści się w granicach od 11,69 do 34,48%, a średnia zawartość części lotnych w stanie analitycznym w odpadach zawiera się w granicach od 14,29 do 28,50%. Analiza granulometryczna mułów węglowych wykazała, że średni wychód klasy ziarnowej poniżej 0,1 mm dla wszystkich osadników wynosi 62,27%. średnia wartość opałowa w stanie analitycznym w mułach zdeponowanych w poszczególnych osadnikach w klasie ziarnowej poniżej 0,1 mm jest dość wysoka i wynosi 12 078 kJ/kg. Klasa ta charakteryzuje się wyższą zawartością popiołu i siarki. Zaprezentowane wyniki wskazują na znaczne zróznicowanie jakości mułów zdeponowanych w poszczególnych osadnikach. Badania wykonano w ramach projektu rozwojowego Nr N R09 0006 06/2009 pt: „Identyfikacja potencja3u energetycznego depozytów mułów weglowych w bilansie paliwowym kraju oraz strategia rozwoju technologicznego w zakresie ich wykorzystania”. Projekt ten realizowany jest przez Instytut Mechanizacji Budownictwa i Górnictwa Skalnego we współpracy z Katedrą Przeróbki Kopalin i Utylizacji Odpadów Politechniki Śląskiej od sierpnia 2009 roku.
This paper presents the results of investigation into the physical, chemical, and energetic properties of steam and coking coal slurries deposited in twenty impoundments. The research includes a determination of chemical composition, moisture content, volatile matter, sulfur, and calorific value at various states. Additionally, the properties of coal slurry of a particle size below 0.1 mm are presented. The determination of the chemical composition revealed that it is typical for such coal tailings with the exception of very low Al2O3 and TiO2 content. The average calorific value in the analytical state of particular impoundments varies from 9,265 to 23,293 kJ/kg. The average ash content in the analytical state at impoundments varies from 26.98% to 63.96%, the average sulfur content in the analytical state varies from 0.57 to 2.98%, the average transient moisture content varies from 11.69 to 34.48%, whereas volatile matter in the analytical state ranges from 14.29 to 28.50%. The average content of the fraction below 0.1 mm for all impoundments is 62.27%. The average calorific value for the fraction below 0.1 mm is relatively high at 12,078 kJ/kg; nevertheless, this fraction has a higher ash and sulfur content. The results presented here indicate considerable variations in the quality of coal slurries deposited in different impoundments which is obvious when taking into account the differing geology of the mines’ coal deposits. At individual impoundments, these differences are smaller as demonstrated by the lower variation in the standard deviation. The research was performed under the development project Nr N R09 0006 06/2009 titled: “Identification of energetic potential of coal slurries in the national fuel balance and technological development strategy of their usage”. The project has been implemented by the Institute of Mechanized Construction & Rock Mining in Warsaw in cooperation with the Department of Mineral Processing and Waste Utilization of the Silesian University of Technology since 2009.

Źródło:

Polityka Energetyczna; 2012, 15, 3; 273-285
1429-6675

Pojawia się w:

Polityka Energetyczna

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 52.

Tytuł:

Procesy starzenia estrów metylowych kwasów tłuszczowych oleju rzepakowego
Ageing processes of rape-seed oil fatty acid methyl esters

Autorzy:

Jakóbiec, J.
Ambrozik, A.

Powiązania:

https://bibliotekanauki.pl/articles/291369.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

biopaliwo RME
właściwości fizykochemiczne
destrukcja
RME biofuel
physicochemical properties
decomposition

Opis:

W pracy zamieszczono informacje dotyczące wpływu czynników kształtujących proces starzenia estrów metylowych kwasów tłuszczowych oleju rzepakowego i ocenę zachodzących zmian podczas symulowanych warunków przechowywania. Istotnym zagadnieniem badawczym FAME to ocena właściwości użytkowych w tym podatność na rozkład mikrobiologiczny i właściwości niskotemperaturowe oraz działanie korodujące.
The paper contains information concerning the impact of factors determining ageing process of fatty acid methyl esters from rape-seed oil and the assessment of changes taking place during simulated storage conditions. The evaluation of functional properties including the susceptibility to microbiological decomposition and low-temperature properties and corrosive action are the key issues in the research of FAME.

Źródło:

Inżynieria Rolnicza; 2009, R. 13, nr 5, 5; 85-91
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 53.

Tytuł:

Physicochemical and thermophysical database (DAFIT) in the prospect of Java and data warehouse

Autorzy:

Bylicki, A.
Gorawski, M.

Powiązania:

https://bibliotekanauki.pl/articles/1941707.pdf

Data publikacji:

2000

Wydawca:

Politechnika Gdańska

Tematy:

physicochemical properties
thermophysical properties
database
data warenhouse
OLAP
data aggregation

Opis:

In this paper, we are discussing the meaning of DaFiT database for knowledge on physicochemical properties, methods of database access and graphical presentation. The paper presents the state of development of DaFiT database and concentrates on the application of the Java and DW technologies.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2000, 4, 1; 109-114
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 54.

Tytuł:

The role of biosurfactants in soil remediation
Rola biosurfaktantów w remediacji gleby

Autorzy:

Mańko-Jurkowska, D.
Ostrowska-Ligęza, E.
Górska, A.
Głowacka, R.

Powiązania:

https://bibliotekanauki.pl/articles/13925548.pdf

Data publikacji:

2019

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

biosurfactant
chemical structure
biodegradation
soil remediation
technological property
physicochemical property

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 2019, 596; 33-43
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 55.

Tytuł:

Assessing Water Quality of Kufranja Dam (Jordan) for Drinking and Irrigation: Application of the Water Quality Index

Autorzy:

Abualhaija, Mahmoud M.
Mohammad, Alsharifa-Hind

Powiązania:

https://bibliotekanauki.pl/articles/1955562.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Kufranja Dam
Jordan
physicochemical parameter
water quality index
drinking
irrigation

Opis:

The current study was undertaken to assess the physicochemical quality of the Kufranja dam (KD) surface water in northern Jordan during the summer and winter seasons [2019]. The samples were analyzed for temperature, pH, dissolved oxygen, conductivity, major cations, major anions, and heavy metals. Most of the physicochemical parameters exhibited a similar spatial distribution, where the maximum concentrations were observed at the dam’s entrance, while the minimum concentrations were recorded at the dam’s end. This indicates that the factors affecting their occurrence and distribution are the same, including natural discharges from the surrounding catchment areas, weathering products, agricultural activities, and wastewater effluents that enter the dam via Wadi Kufranja. All the physicochemical parameters and heavy metals in KD water lie below the maximum permissible levels of the Jordanian and international standards for drinking and irrigation, except for EC values that are above WHO standards for drinking. The application of the water quality index (WQI) depicts that the KD water is chemically unsuitable for use in drinking and needs proper treatment before use. The irrigation indices (SAR, Na%, and MH) indicate that the KD water is chemically suitable for irrigation, whereas EC results and USSL diagram showed that the dam’s water is suitable for irrigation and belongs to the categories of good to permissible for irrigation. Therefore, KD water is suitable for irrigation of most soils (except soils with low salt tolerance). Crops with good salt tolerance are recommended and a special treatment of salinity might be required.

Źródło:

Journal of Ecological Engineering; 2021, 22, 9; 159-175
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 56.

Tytuł:

Lignosulfonate and silica as precursors of advanced composites

Autorzy:

Klapiszewski, Ł.
Nowacka, M.
Siwińska-Stefańska, K.
Jesionowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/778432.pdf

Data publikacji:

2013

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

Magnesium lignosulfonate
silica
Silica/lignosulfonate composite
Physicochemical and structural properties

Opis:

Advanced silica/lignosulfonate composites were obtained using magnesium lignosulfonate and silica precipitated in a polar medium. For comparative purposes analogous synthesis was performed using commercial silica Aerosil®200. Lignosulfonates are waste products of paper industry and their application in new multifunctional materials is of great economic interest. The composites obtained were subjected to thorough characterization by determination of their physicochemical, dispersive-morphological and electrokinetic properties. Their particle size distribution was measured, SEM images were taken, FT-IR analysis and colorimetric study were made, thermal and electrokinetic stabilities and parameters of porous structure were also determined. The results can be of interest in further application studies.

Źródło:

Polish Journal of Chemical Technology; 2013, 15, 3; 103-109
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 57.

Tytuł:

Water Quality Assessment of the Morava e Binçës River Based on the Physicochemical Parameters and Water Quality Index

Autorzy:

Musliu, M.
Bilalli, A.
Durmishi, B.
Ismaili, M.
Ibrahimi, H.

Powiązania:

https://bibliotekanauki.pl/articles/124003.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

physicochemical parameter
river waters
Water Quality
WQI
Morava e Binçës

Opis:

The quality of surface waters is being impacted by the anthropogenic and natural pollution, thus limiting the usage of this water for drinking, industry, agriculture, recreation and other purposes. The water quality indices are intended to provide a single value for the water quality of a source or a stream that reduces the large amount of parameters in a simpler expression and enables an easy interpretation of the monitoring data. During 2017, seventeen physicochemical parameters were measured in spring, summer, autumn and winter, in five locations along the Morava e Binçës River in Kosovo. For the assessment we employed the Water Quality Index (WQI) which uses the physicochemical parameters for the evaluation of the water quality. The findings of this study ascertain that MB1 station had the best quality with a value of WQI 88 and is classified in the Good Category, whereas the lowest quality of water was found on in MB4 station with a value of WQI 65 and it is thus classified in the Fair Category. Finally, the average WQI was calculated for the entire measurement period and it resulted in a value of 77.60 indicating that the Morava e Binçës River waters belong to the Fair Category.

Źródło:

Journal of Ecological Engineering; 2018, 19, 6; 104-112
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 58.

Tytuł:

Effects of Stewing Modes on Physicochemical Quality and Formation of Flavour Compounds of Chinese Dagu Chicken Soup

Autorzy:

Guan, Haining
Xu, Xiaojun
Feng, Chunmei
Tian, Yanli
Liu, Dengyong
Diao, Xiaoqin

Powiązania:

https://bibliotekanauki.pl/articles/28408447.pdf

Data publikacji:

2024-02-08

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

chicken soup
stewing modes
physicochemical quality
taste components
volatile compounds

Opis:

This study aimed to evaluate the influences of stewing modes, including high fire short time (HFST, 100°C/1 h), medium-high fire mid-length time (MFMT, 98°C/2 h), medium fire long time (MFLT, 90°C/3 h), and low fire ultra-length time (LFUT, 83°C/4 h) processing, on physicochemical parameters and flavour compound profile of Chinese Dagu chicken soup. The chicken soup prepared under the stewing mode of MFMT had smaller particle size (d_3,2 of 2.56 μm and d_4,3 of 1.73 μm), higher zeta potential (8.66 mV), and viscosity than the soups stewed under the other conditions. The umami-taste compounds, such as inosine 5'-monophosphate, and umami free amino acid were the most abundant in the soup stewed by MFMT (53.47 and 59.91 mg/100 mL, respectively). GC-MS results showed that the volatile compounds were mainly hexanal, octanal, heptanal, (E,E)-2,4-decadienal, nonanal, and 1-octen-3-ol. Additionally, the results of measurements made with the electronic nose and electronic tongue indicated that the overall flavour of the four chicken soups varied significantly. In general, considering the stability and umami taste of chicken soup, as well as the time-saving need, it is recommended to use the MFMT mode to prepare the chicken soup.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2024, 74, 1; 26-40
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 59.

Tytuł:

Effect of acid whey as starter culture on selected physicochemical properties of fermented pork sausage

Autorzy:

Ferysiuk, Karolina
Wójciak, Karolina M.
Solska, Elżbieta

Powiązania:

https://bibliotekanauki.pl/articles/1178212.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

acid whey
fermented sausage
physicochemical properties
pork
starter culture

Opis:

The aim of the study was to evaluate the effect of acid whey as a starter culture on selected physicochemical properties of fermented pork sausage after ripening (21 days). Four variants of the product have been produced. The first variant (PKS) - cured sausage (2.8%) with starter cultures. Second variant (SSK) – salted sausage (2.8%) with acid whey (5%). Third variant (SKS) – salted sausage (2.8%) with starter cultures. In the fourth variant (PSK), sea salt (2.8%) and acid whey (5%) were used. The research included determination of pH value, water activity, TBARS indicator, analysis of total content of haem pigments and heme iron, determination of color parameters by CIE L * a * b * system and analysis of sausage texture parameters (TPA). The pH values of sausages with acid whey were significantly lower compared to fermented sausages with starter cultures. The highest TBARS index was observed in the SSK (0.612 mg MDA / kg), and the lowest in the PKS sample (0.118 mg MDA / kg). The highest overall content of heme dyes and heme iron was recorded in the PSK test. A higher share of redness was observed in the general tone of color in cured sausages (PKS, PSK) by about 1-2 units compared to salted samples (SSK, SKS). In case of texture, significantly higher values of the hardness parameter were observed in the PSK test as compared to the remaining test samples. Based on the tests, it has been found that it is possible to use acid whey as a starter culture in fermented pork sausage. However, the best results were obtained in the curing sample with acid whey (PSK).

Źródło:

World Scientific News; 2018, 93; 10-18
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 60.

Tytuł:

Physicochemical properties of spray dried honey preparations
Właściwości fizyko-chemiczne preparatów miodowych suszonych rozpyłowo

Autorzy:

Samborska, K.
Bienkowska, B.

Powiązania:

https://bibliotekanauki.pl/articles/798457.pdf

Data publikacji:

2013

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

honey preparation
physicochemical property
spray drying
bulk density
hygroscopicity

Opis:

The aim of work was to characterise the physical and chemical properties of spray dried honey preparations and the changes in these properties during storage. Spray drying was performed at inlet air temperature 160 and 200°C, atomising disk speed 32 000 and 38 000 rpm, with the use of two types of carriers: dextrin and maltodextrin. The resulting powders had the desirable physical properties: low water content and activity, complete solubility and low cohesiveness. The powders produced with the use of dextrin had higher hygroscopicity and poorer solubility, they were also characterised by the highest water absorption during storage. Powders obtained with the use of reduced atomisation speed were the most stable in terms of water absorption and the changes of hygroscopicity during storage. Solubility of all powders was stable during storage.
Celem pracy było określenie właściwości fizycznych i chemicznych preparatów miodowych suszonych rozpyłowo oraz zmiany tych właściwości w czasie przechowywania. Suszenie rozpyłowe przeprowadzono przy temperaturze powietrza wlotowego 160 do 200°C, szybkość obrotowa dysku rozpylającego wynosiła 32 000 i 38 000 obrotów na minutę, użyto dwóch rodzajów nośników: dekstrynę i maltodekstrynę. Otrzymane proszki miały pożądane właściwości fizyczne: niską zawartość i aktywność wody, całkowitą rozpuszczalność i niską spójność. Proszki wytworzone z wykorzystaniem dekstryny miały wyższą higroskopijność i gorszą rozpuszczalność, charakteryzowały się najwyższą ilością wchłoniętej wody w czasie przechowywania. Proszki otrzymane z wykorzystaniem zmniejszonej szybkości obrotowej dysku rozpylającego były bardziej stabilne pod względem absorpcji wody i zmiany higroskopijności podczas przechowywania. Rozpuszczalność wszystkich proszków była stabilna w czasie przechowywania.

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 2013, 575
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 61.

Tytuł:

Assessment of a sheltered euhaline area of the Southeastern Bay of Biscay to sustain bivalve production in terms of phytoplankton community composition

Autorzy:

Bilbao, J.
Muniz, O.
Rodriguez, J.G.
Revilla, M.
Laza-Matinez, A.
Seoane, S.

Powiązania:

https://bibliotekanauki.pl/articles/2078991.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

phytoplankton community
phytoplankton composition
biomass
physicochemical variation
aquaculture
mussel
Biscay Bay

Opis:

This study describes the phytoplankton community in sheltered euhaline waters of the Basque coast (southeastern Bay of Biscay). Phytoplankton composition, cell size, abundance, biomass and the presence of potentially toxic taxa, together with chlorophyll a, nutrients and hydrographic and optical conditions were measured, from August 2016 to August 2017, in the Mutriku port, with the main aim of assessing the suitability of the phytoplankton community as a food resource for bivalves. The water column in Mutriku showed the typical environmental conditions of Basque marine waters, with no significant nutrient enrichment caused by anthropogenic pressures. Haptophytes represented the greatest contribution to cell abundance (31—47%), and diatoms were the dominant group in terms of biomass (52—79%), which could favour mussel growth due to their high fatty acid content. In addition, the size structure of the phytoplankton community was suitable for mussel ingestion, since the predominant cell size was 2—20 μm. Regarding toxic phytoplankton, the genera that pose a risk for human health and those that affect negatively mussel physiology and survival were considered. Altogether, ten toxic phytoplankton taxa were identified, contributing in less than 5% to the total cell abundance of Mutriku. However, median chlorophyll a concentration was low (0.5 μg L−1), reflecting the oligotrophic conditions of the area. Therefore, even if the composition of the phytoplankton community could be favourable for bivalve aquaculture, biomass values are low compared to other zones of bivalve production.

Źródło:

Oceanologia; 2021, 63, 1; 12-26
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 62.

Tytuł:

Influence of environmental media on carbon nanotubes and graphene nanoplatelets towards bacterial toxicity

Autorzy:

Baysal, A.
Saygin, H.
Ustabasi, G. S.

Powiązania:

https://bibliotekanauki.pl/articles/204654.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

multi-walled carbon nanotubes
environmental media
bacterial toxicity
Graphene
physicochemical properties

Opis:

Functional carbon-based nanomaterials have become important due to their unique combinations of chemical and physical properties, and also because of the increasing research efforts in various fi elds. A signifi cant gap in nanotechnology is the disregarding of physicochemical transformation under real conditions for the examination and comparison on the effect of carbon based nanomaterials. In this study, the behavior of some carbon based nanomaterials (multi-walled carbon nanotubes and graphene nanoplatelets) in environmental media (sea water, soil, and airborne fi ne particulate) were evaluated by using the infl uence on nanomaterial physicochemical properties (size, zeta potential, surface chemistry, morphology and sedimentation) and on the toxicity of bacterium (gram positive and gram negative bacteria) to contribute to their environmental hazard and risk assessment on the environment. The bacteria were exposed to the carbon based nanomaterials, and cultivated on nutrient agar plates including each environmental media, and then counted for the colony forming units. The physicochemical properties of the carbon based nanomaterials dispersed in these environmental media were also investigated. Our results indicated that the toxicity depended on the type of environmental media and their concentration, and the physicochemical properties of the carbon based nanomaterials changed when compared to the results obtained in controlled conditions.

Źródło:

Archives of Environmental Protection; 2018, 44, 3; 85-98
2083-4772
2083-4810

Pojawia się w:

Archives of Environmental Protection

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 63.

Tytuł:

Monthly changes in physicochemical parameters of the groundwater in Nida valley, Poland (case study)

Autorzy:

Phan, Cong Ngoc
Strużyński, Andrzej
Kowalik, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/2203556.pdf

Data publikacji:

2023

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

groundwater
Nida valley
physicochemical water property
statistical method
water quality classification

Opis:

The groundwater of the Nida valley was investigated to assess the quality of water source and monthly variations of the physicochemical parameters. A total of 70 water samples were collected from 7 sampling sites during a 10 months period from June 2021 to March 2022. Sampling frequency was once per month. The parameters such as temperature (T), electrical conductivity (EC), dissolved oxygen (DO), pH, total dissolved solids (TDS) were measured in-situ by using handheld device. Meanwhile, total nitrogen (TN), total phosphorus (TP), chloride (Cl – ), sulphate (SO42– ), manganese (Mn), iron (Fe), zinc (Zn), cadmium (Cd), lead (Pb), copper (Cu), chemical oxygen demand (COD) were analysed in the laboratory. According to the classification of Ministry of Marine Economy and Inland Navigation in Poland (2019), some investigated parameters are classified as unsatisfactory quality waters (class 4) and poor-quality waters (class 5) for a few specific months. Such as, TP concentrations obtained in June and January are classified as class 4, SO42– concentrations corresponded to classes 4 and 5 in June, July and August, and Mn concentrations (except in January) are settled in class 5. The high values of Fe in November are arranged in class 5 and in June, July to September and March are classified in class 4. Statistical methods were used as: Shapiro-Wilk test (α = 0.05), ANOVA test and post-hoc Tukey test (α = 0.05), Kruskal-Wallis test and Wilcoxon (Mann-Whitney) rank sum test (α = 0.05) estimated the significant differences in sampling months. Pearson correlation analysis (α = 0.01 and 0.05), principal component analysis (PCA) and cluster analysis showed correlation between the parameters and sampling months.

Źródło:

Journal of Water and Land Development; 2023, 56; 220--234
1429-7426
2083-4535

Pojawia się w:

Journal of Water and Land Development

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 64.

Tytuł:

Study of Physicochemical and Bacteriological Quality of Treated Wastewater by the New Aourir Plant (Southwestern of Morocco) Using Activated Sludge Technology in a Semi-Arid Region

Autorzy:

Hajji, Sara
Ait Alla, Aicha
Noureddine, Slimani
Haddad, Mohamed Ben
Moukrim, Abdellatif

Powiązania:

https://bibliotekanauki.pl/articles/1838386.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

wastewater
Morocco
physicochemical parameter
activated sludge
Aourir
bacteriological parameter
treatment plant

Opis:

In order to use the purified wastewater for the irrigation of a golf course in the Taghazout area (Southwestern of Morocco), this study was conducted to evaluate the physicochemical and bacteriological quality of the treated wastewater in the new Aourir plant (Activated Sludge technology). In order to achieve these objectives, three types of water were analyzed: raw water (RW), biologically treated water (BTW) and water treated by ultraviolet radiation (UV-TW). The physicochemical parameters analyzed were Temperature, pH, Electrical Conductivity (EC), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), five-day Biological Oxygen Demand (BOD5), Total Suspended Solids (SS), Nitrate (NO3), and Orthophosphates (PO4). Otherwise, the analyzed biological parameters are Total Coliforms (TC), Fecal Coliforms (FC), Escherichia coli (E. coli), and Fecal Streptococci (FS). The physicochemical parameters showed that temperature is always lower than 30°C, the pH is close to neutrality and a strong fluctuation of the high electrical conductivity (2700 μS/cm) occurs in UV-TW. At all stages of wastewater treatment, COD, BOD5, SS, NO3 and PO4 were below the limit values recommended by Moroccan standards. The bacteriological results showed a high level of bacterial contamination in RW and BTW, but in UV-TW the loads did not exceed 3 log10. The average loads of TC, FC, E. coli and FC in UV-TW were 2.13, 1.67, 1.77, and 2 (log10 CFU/100ml) respectively. Activated sludge treatment combined with UV has demonstrated sufficient quality to reuse treated water in irrigation; however, the UV treatment requires control to avoid any effect on the microbiological and physicochemical quality of green spaces and groundwater.

Źródło:

Journal of Ecological Engineering; 2021, 22, 6; 83-98
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 65.

Tytuł:

Monitoring of Physicochemical and Microbiological Quality of Taghazout Seawater (Southwest of Morocco): Impact of the New Tourist Resort "Taghazout Bay"

Autorzy:

Lamine, Imane
Alla, Aicha Ait
Bourouache, Mohamed
Moukrim, Abdellatif

Powiązania:

https://bibliotekanauki.pl/articles/124689.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

seawater
faecal coliforms
fecal streptococci
physicochemical quality
Taghazout Bay
Agadir
Morocco

Opis:

The marine environment plays a major socio-economic role in the Agadir region (south-west Morocco). This area, which hosts important fishery resources, is currently not spared from the pollutants produced in the course of agricultural, domestic, industrial and tourist development. The aim of this study is to assess the impact of the Taghazout bay tourist resort on the bacteriological and physicochemical quality of the coastal waters of Taghazout. The seawater samples were collected between March 2016 and March 2018 at three sampling sites (S1, S2 and S3) in order to monitor the concentrations of fecal coliforms (FC), fecal streptococci (FS) and total germs (TG). The results of physicochemical parameters show seasonal fluctuations influenced by climatic factors. The spatio-temporal monitoring of the bacteriological parameters shows that the average total germ count is 127.05 CFU/100 ml, 39.61 CFU/100 ml for fecal coliforms and 15.21 CFU/100 ml for fecal streptococci. The values of FC80, FC95 and FS90 do not exceed the guide values of the Moroccan standards. This classifies the Taghazout beach in category A (good quality of bathing water). The monitoring analysis recorded by the Pearson correlation test between the environmental parameters and the level of fecal bacteria showed that there was a significant positive correlation between the FC concentrations and rainfall; the FS concentrations showed significant positive correlations with all the environmental parameters while the TG concentrations indicate no correlation with them. The fecal contamination parameters should be routinely monitored for improving the environmental conditions of coastal cities. This must be the case for the Taghazout coastline where a regular monitoring program must be established to evaluate the impact of the new tourist resort “Taghazout bay” on the environmental quality of this ecosystem.

Źródło:

Journal of Ecological Engineering; 2019, 20, 7; 79-89
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 66.

Tytuł:

Waste-to-energy technologies as the future of internal combustion engines

Autorzy:

Hamid, Mohamad
Wesołowski, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/24202463.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Naukowe Silników Spalinowych

Tematy:

syngas
gasification
physicochemical properties
applications
gaz syntezowy
zgazowanie
właściwości fizykochemiczne
zastosowania

Opis:

Syngas has a promising future as alternative to petroleum products and as a fuel for combustion engines. This study provides an overview on the feasibility of using syngas to power internal combustion engines. It presents technological process solutions for producing syngas toward minimizing the formation of tars as the most undesirable component for engine applications.. The combustion process characteristic of syngas composition has been tackled including critical criteria such as the flammability limit, ignition delay, laminar velocity, turbulent velocity, and the subsequent challenges in determining a numerical methods that best matches the experimental datas. The syngas usage as alternative resource, while tackling the uncertainty issue of its composition, for Compression Ignition (CI) and Spark Ignition (SI) with the emission and performance effectiveness has been studied as well. The results of the review showed that syngas can be a viable alternative for some stationary applications, such as advanced integrated systems (ICCG), but its application is, however, relatively limited, for example as a secondary fuel in engines (CI) for automotive applications. However, significant discrepancies between numerical (simulation) and experimental results have been noted. This suggests that there are many scientific and experimental challenges in the area of syngas combustion processes in internal combustion engines. However, given the potential of this group of fuels, especially in the face of the energy crisis, this research is highly desirable and has a significant application perspective.

Źródło:

Combustion Engines; 2023, 62, 2; 52--63
2300-9896
2658-1442

Pojawia się w:

Combustion Engines

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 67.

Tytuł:

Activated biocarbons obtained from lignocellulosic precursors as potential adsorbents of ammonia

Autorzy:

Jedynak, Katarzyna
Charmas, Barbara

Powiązania:

https://bibliotekanauki.pl/articles/24085696.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

activated biocarbon
various carbon precursors
physical activation
physicochemical properties
ammonia adsorption

Opis:

The investigated materials were new biocarbons: FC (Fir Cone), FS (Fir Sawdust), FB (Fir Bark), BS (Birch Sawdust), BB (Birch Bark), AS (Acacia Sawdust), AB (Acacia Bark), OS (Oak Sawdust), OB (Oak Bark), HS (Hornbeam Sawdust)) obtained via pyrolysis and CO2 activation of wood waste (lignocellulosic biomass). In order to study the influence of the carbon precursor on the physicochemical properties of biocarbons there were used the precursors: cones, sawdust, and bark of various tree species. The obtained adsorbents were characterized based on the results, of the N2 adsorption, scanning electron microscopy (SEM), elemental analysis (CHNS), thermogravimetry (TG), derivative thermogravimetry (DTG), and differential thermal analysis (DTA), Fourier Transform Infrared Spectroscopy FT-IR (ATR) and the Boehm’s titration method as well as pHpzc (the point of zero charge). The adsorption capacity and the temperature-programmed desorption (TPD) of ammonia were also studied. The obtained activated biocarbons were characterized by the large specific surface area (515 to 1286 m2/g) and the total pore volume (0.27 to 0.46 cm3/g) as well as the well-developed microporous structure (76 - 90%). The maximum NH3 adsorption capacity of the activated biocarbon was determined to be 2.93 mmol/g (FC (Fir Cone)). These results prove that the lignocellulosic precursors are appropriate for preparation of environmentally friendly and cost-effective biocarbons.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 169835
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 68.

Tytuł:

Wpływ odwadniania osmotycznego na właściwości fizykochemiczne dyni
Effect of osmotic dehydration on physicochemical properties of pumpking

Autorzy:

Pękosławska, A.
Lenart, A.

Powiązania:

https://bibliotekanauki.pl/articles/2070122.pdf

Data publikacji:

2009

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

odwadnianie osmotyczne
właściwości fizykochemiczne
dynia
osmotic dehydratation
physicochemical properties
pumpkin

Opis:

W pracy podjęto badania, nad określeniem wpływu stężenia (20— 66,3%) i temperatury (20-60"C) roztworu syropu skrobiowego na zmiany właściwości fizykochemicznych dyni wywołane odwadnianiem osmotycznym. Czas procesu mieścił się w zakresie 0—300 minut. Analiza właściwości fizykochemicznych obejmowała: aktywność wody, barwę, zawartość cukrów i karotenoidów. Największe zmiany odnotowano dla próbek odwadnianych w 66.3 % roztworze syropu skrobiowego i temperaturze- 60"C przez 300 minut.
The aim of investigations was to explain an influence of concentration j (20—66.3%) and temperature (20—60°C) of starch syrup solution on i physicochemical properties of pumpkin. Time of dehydration of the i process varied from 0 to 300 minutes. Water activity, colour, total su- f gar and carotenoids content were analyzed. The most significant changes took place during osmotic dehydration in 66.3% starch syrup at temperature of 60°C kept during 300 minutes.

Źródło:

Inżynieria i Aparatura Chemiczna; 2009, 1; 56-57
0368-0827

Pojawia się w:

Inżynieria i Aparatura Chemiczna

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 69.

Tytuł:

Influence of glycine and arginine ligands on some of physicochemical properties of magnesium aspartate
Wplyw ligandow glicyny i argininy na niektore wlasciwosci fizykochemiczne asparaginianu magnezowego

Autorzy:

Marcoin, W
Duda, H.

Powiązania:

https://bibliotekanauki.pl/articles/16145.pdf

Data publikacji:

2006

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

magnesium aspartate
physicochemical property
arginine ligand
glycine
thermal analysis
dehydration

Opis:

Hydrate complexes of magnesium aspartate, magnesium aspartate glycinate, magnesium aspartate arginate have been synthesized and characterized by the elemental and spectral analysis. The formulae of the magnesium complexes were Mg(C4H6O4N) • 4H2O, Mg(C6H10O5N2) • 5H2O, and Mg(C10H19O5N5) • 7H2O. The main thermal process: dehydration of the complexes, was studied using the thermoanalytical methods: differential thermal analysis (DTA), thermogravimetric analysis (TG), and differential scanning calorimemtry (DSC) measurements. The influence of additional ligands (glycinate or arginate) introduced to the structure of magnesium aspartate on the physicochemical properties of the newly synthesized compounds was analysed.
Metodą analizy elementarnej i spektralnej scharakteryzowano syntezowane hydraty kompleksów asparaginianu magnezowego, glicynianoasparaginianu magnezowego, arginiano-asparaginianu magnezowego, Kompleksy magnezowe o wzorach : Mg(C4H6O4N) • 4H2O, Mg(C6H10O5N2) • 5H2O, and Mg(C10H19O5N5) • 7H2O. Zastosowano metody termoanalityczne: różnicową termiczną analizę (DTA), termograwimetryczną analizę (TG), skaningową kalorymetrię różnicową (DSC) do badania głównego procesu termicznego: dehydratacji badanych kompleksów. Potwierdzono wpływ wprowadzonych do struktury asparaginianu magnezowego dodatkowych ligandów glicyny lub argininy na fizykochemiczne właściwości nowo syntezowanych związków.

Źródło:

Journal of Elementology; 2006, 11, 1
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 70.

Tytuł:

Badania fizykochemiczne obiektów zabytkowych na Dolnym Śląsku
Physicochemical research of historic objects in Lower Silesia

Autorzy:

Łydżba-Kopczyńska, B.

Powiązania:

https://bibliotekanauki.pl/articles/217570.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Konserwatorów Zabytków

Tematy:

Dolny Śląsk
zabytek
badania fizykochemiczne
Lower Silesia
monument
physicochemical research

Opis:

Spektroskopia ramanowska jest techniką analityczną pozwalającą na prowadzenie w sposób niedestrukcyjny zarówno jakościowych, jak i ilościowych badań obiektów zabytkowych. W projektach badawczych prowadzonych przez Laboratorium Badań Dziedzictwa Kulturowego z powodzeniem jest stosowana w połączeniu z różnymi metodami fizykochemicznymi w analizie dzieł sztuki i obiektów archeologicznych pochodzących z Dolnego Śląska. Dzięki wykorzystaniu spektroskopii ramanowskiej badania przeprowadzone bezpośrednio na prehistorycznych kryształach górskich oraz na bursztynach umożliwiły określenie pochodzenia tych obiektów bez ich uszkodzenia. Badania materiałów malarskich zastosowanych w gotyckim malowidle z kościoła Świętego Macieja pozwoliły na zweryfikowanie wstępnej identyfikacji pigmentów. Z kolei kompleksowe badania fizykochemiczne wyjaśniły, gdzie znajdują się źródła surowca i miejsca wytworzenia archeologicznej ceramiki. Analiza fizykochemiczna bazująca na nowoczesnych technikach analitycznych dostarczyła informacji pozwalających na pogłębienie wiedzy o badanych obiektach.
Raman spectroscopy is an analytical technique which allows for conducting both qualitative and quantitative research of historical objects in a nondestructive way. In the research projects carried out by the Cultural Heritage Research Laboratory, it has been successfully applied in combination with other physicochemical methods, for the analysis of works of art and archeological objects found in Lower Silesia. Owing to the use of raman spectroscopy, research conducted directly on prehistoric rock crystals and amber allowed for identifying the origins of those objects without destroying them. Analysis of the painting materials used in the Gothic painting from the church of St. Matthias, allowed for verifying the initial pigment identification. Moreover, the complex physicochemical research helped to explain where the sources of raw material and places of manufacturing the archeological pottery were located. Physicochemical analysis based on modern analytical techniques supplied information allowing for broadening the knowledge concerning the examined objects.

Źródło:

Wiadomości Konserwatorskie; 2010, 27; 108-116
0860-2395
2544-8870

Pojawia się w:

Wiadomości Konserwatorskie

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 71.

Tytuł:

Preliminary Assesment of the Quality of Herbhoneys and Chokeberry Syrups Used for their Production
Wstępna ocena jakości ziołomiodów aroniowych i pożytków wykorzystanych do ich produkcji

Autorzy:

Żak, N.
Wilczyńska, A.

Powiązania:

https://bibliotekanauki.pl/articles/342352.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni

Tematy:

herbhoneys
physicochemical properties
antioxidant activity
ziołomiody
fizykochemiczne właściwości
aktywność antyoksydacyjna

Opis:

This study presents results of research on the quality of chokeberry herbhoneys and syrups used to produce them. The study included evaluation of the content of water, sugars, free acids and electrical conductivity. In addition, the antiradical activity against free radicals DPPH and total phenolic content were evaluated. Also color parameters L *, a *, b * were determined in the CIE system. Study results revealed that herbhoneys have met all quality requirements specified for the honey in the Regulation of the Minister of Agriculture. The processing of chokeberry syrup by bees to honey results in changes in: water content, sugars, and total polyphenol content. Herbhoney has a much higher ability of scavenge DPPH radicals, than chokeberry syrup.
W pracy przedstawiono wyniki badań dotyczących jakości ziołomiodów aroniowych oraz pożytków wykorzystanych do ich produkcji. Badania obejmowały oznaczenie zawartości: wody, cukrów, wolnych kwasów oraz przewodności elektrycznej właściwej. Dodatkowo oznaczono aktywność przeciwutleniającą jako siłę zmiatania wolnych rodników DPPH oraz ogólną zawartość związków fenolowych. W badanych próbkach oznaczono również parametry barwy L*, a*, b* w systemie CIE. Uzyskane wyniki pozwoliły stwierdzić, że ziołomiody aroniowe spełniają wymagania jakościowe określone dla miodów pszczelich w rozporządzeniu MRiRW. Przetwarzanie pożytku aroniowego przez pszczoły na ziołomiody ma istotny wpływ na: zawartość wody, cukrów oraz ogólną zawartość polifenoli. Ziołomiody aroniowe charakteryzują się znacznie wyższą średnią zdolnością zmiatania wolnych rodników DPPH niż pożytki aroniowe, z których powstają.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Gdyni; 2017, 101; 73-80
1644-1818
2451-2486

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Gdyni

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 72.

Tytuł:

Zmiany wlasciwosci fizykochemicznych skrobi ziemniaczanej wywolane procesem utleniania

Autorzy:

Pietrzyk, S
Fortuna, T

Powiązania:

https://bibliotekanauki.pl/articles/805877.pdf

Data publikacji:

2006

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

utlenianie
skrobia ziemniaczana
wlasciwosci fizykochemiczne
oxidation
potato starch
physicochemical property

Opis:

Native potato starch was oxidized by means of: sodium chlorate(I), hydrogen peroxide and sodium chlorate(III) - at presence of formaldehyde. Native and modified starches were analyzed for the contents of carboxylic and aldehyde groups, amylose and total phosphorus. Also water binding capacity as well as the solubility in water, gelatinization characteristics and flowing curves analyses were done. On the bases of obtained results it may be stated that sodium chlorate(I) and hydrogen peroxide were more effective oxidizing agents than sodium chlorate(III). Oxidized starches were characterized by lower total phosphorus and amylose contents. All applied modifications caused total solubility of obtained starches at 80°C. Modification with sodium chlorate(III) and hydrogen peroxide did not change the water biding capacity of starch solubility in water at temp. 60°C, whereas with the sodium chlorate(III) - the solubility only. It was also observed, the lowering of parameters of gelatinization profile and K coefficient of consistency due to action of oxidizing agents. Sodium chlorate(III) decreased the viscosity of obtained glued starch only during refrigeration and holding at temperature 50°C.
Naturalną skrobię ziemniaczaną poddano reakcji utleniania chloranem(I) sodu, nadtlenkiem wodoru oraz chloranem(III) sodu w obecności formaldehydu. W skrobi naturalnej oraz w uzyskanych preparatach modyfikowanych oznaczono zawartość grup aldehydowych i karboksylowych, zawartość fosforu całkowitego, zdolność wiązania wody i rozpuszczalność w wodzie. Ponadto wyznaczono charakterystykę kleikowania wodnych dyspersji skrobiowych przy użyciu wiskozymetru rotacyjnego Rheotest 2, jak również wyznaczono krzywe płynięcia w reometrze rotacyjnym Rheolab MC 1 w temperaturze 50°C. Na podstawie uzyskanych wyników stwierdzono, że utlenianie skrobi chloranem(I) sodu i nadtlenkiem wodoru było bardziej efektywne i powodowało wjększy przyrost grup karboksylowych i aldehydowych niż utlenianie chloranem(III) sodu. Uzyskane skrobie modyfikowane charakteryzowały się mniejszą zawartością fosforu i amylozy w porównaniu do skrobi wyjściowych. Wszystkie zastosowane modyfikacje spowodowały całkowitą rozpuszczalność skrobi w temp. 80°C Modyfikacja chloranem(III) sodu oraz nadtlenkiem wodoru nie wpłynęła na zmianę zdolności wiązania wody skrobi w temp. 60°C, natomiast chloranem(III) sodu jedynie na zmianę jej rozpuszczalności. W wyniku działania zastosowanych utleniaczy zaobserwowano obniżenie współczynnika konsystencji „K” oraz parametrów charakterystyki kleikowania w porównaniu do skrobi naturalnej. Modyfikacja chloranem(III) sodu spowodowała obniżenie lepkość kleiku skrobiowego jedynie w trakcie chłodzenia i przetrzymywania go w temp. 50°C.

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 511, 2; 627-637
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 73.

Tytuł:

Hydrochemical Conditions of the Łososina River Water Management in the Area of Tymbark

Autorzy:

Policht-Latawiec, A.
Kanownik, W.

Powiązania:

https://bibliotekanauki.pl/articles/124810.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

water quality
physicochemical indices
water management
Łososina river
Tymbark city

Opis:

Sustainable use of waters requires not only determining the amount, but primarily the quality of the available water resources and developing a long-term programme of their protection. The analysis of the Łososina river water in the area of Tymbark city was presented in the paper. The water was tested in a view of the requirements as the natural fish habitat and its potential use for people supply in potable water. The river water samples were taken in 2014 at randomly selected dates, once a month in 5 measurement points. 21 physicochemical indices were assessed in the samples. The assessment of the Łososina river water quality was made on the basis of the results of both: on site and laboratory testing, which were compared with the Regulation of the Minister of Environment of 23 October 2014. The utility values were assessed on the basis of the Regulations of the Minister of Environment of 27 November and 04 October 2014. The analysis of the results demonstrated that the Łososina river water met the requirements of quality class I water in points 1, 2 and 3. Below Tymbark the Łososina river water was polluted, so due to high BOD5 in points 4 and 5, and phosphate concentrations in point 4, it was classified as class II, i.e. good state. Pollution coefficients computed according to Burchard and Dubaniewicz classify the Łososina river water as clean along the whole investigated stretch. Below Tymbark city (points 4 and 5) the Łososina river water cannot be used for drinking water supply because of high BOD5 and iron concentrations. In the other points it could be used for water supply following appropriate physical and chemical treatment. The water does not meet the requirements for salmonid or cyprinid fish along the whole stretch because of high nitrite concentrations, except point 3, where the Łososina river water provided a proper natural habitat for carp.

Źródło:

Journal of Ecological Engineering; 2015, 16, 5; 151-159
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 74.

Tytuł:

A proposal for calculating the no-observed-adverse-effect level (NOAEL) for organic compounds responsible for liver toxicity based on their physicochemical properties

Autorzy:

Jakubowski, Marek
Czerczak, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/2178862.pdf

Data publikacji:

2014-08-06

Wydawca:

Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi

Tematy:

liver
NOAEL
LOAEL
organic compounds
physicochemical properties
Abraham’s Eq

Opis:

Objectives: Both environmental and occupational exposure limits are based on the no-observed-adverse-effect level (NOAEL), lowest-observed-adverse-effect level (LOAEL) or benchmark dose (BMD) deriving from epidemiological and experimental studies. The aim of this study is to investigate to what extent the NOAEL values for organic compounds responsible for liver toxicity calculated based on their physicochemical properties could be used for calculating occupational exposure limits. Material and Methods: The distribution coefficients from air to the liver (log $\text{K}_\text{liver}$) were calculated according to the Abraham solvation equation. NOAEL and LOAEL values for early effects in the liver were obtained from the literature data. The descriptors for Abraham's equation were found for 59 compounds, which were divided into 2 groups: "non-reactive" (alcohols, ketones, esters, ethers, aromatic and aliphatic hydrocarbons, amides) and "possibly reactive" (aldehydes, allyl compounds, amines, benzyl halides, halogenated hydrocarbons, acrylates). Results: The correlation coefficients between log-log K and log NOAEL for non-reactive and reactive compounds amounted to r = -0.8123 and r = -0.8045, respectively, and were statistically significant. It appears that the Abraham equation could be used to predict the NOAEL values for compounds lacking information concerning their liver toxicity. Conclusions: In view of the tendency to limit animal testing procedures, the method proposed in this paper can improve the practice of setting exposure guidelines for the unstudied compounds.

Źródło:

International Journal of Occupational Medicine and Environmental Health; 2014, 27, 4; 627-640
1232-1087
1896-494X

Pojawia się w:

International Journal of Occupational Medicine and Environmental Health

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 75.

Tytuł:

Analiza tendencji zmian stanu fizykochemicznego wód rzeki Głównej
Analysis of trends changes in physicochemical state of the Główna river

Autorzy:

Jaskuła, J.
Sojka, M.
Wicher-Dysarz, J.

Powiązania:

https://bibliotekanauki.pl/articles/400848.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

jakość wody
rzeka nizinna
parametry fizykochemiczne
water quality
lowland river
physicochemical parameters

Opis:

W pracy przedstawiono wyniki analizy zmian stanu fizykochemicznego wód rzeki Głównej w profilu Poznań w latach 1996–2009. Stan fizykochemiczny wód scharakteryzowano na podstawie 11 parametrów: tlenu rozpuszczonego (O₂), BZT₅, przewodności w 20 °C (μS), substancji rozpuszczonych (mg), odczynu (pH), azotu amonowego (N_NH4), azotu Kjeldahla (NI), azotu azotanowego (N_NO3), azotu ogólnego (N^II), fosforanów (PO₄) oraz fosforu ogólnego (P). Analizę stanu fizykochemicznego wód przeprowadzono na tle zmian użytkowania gruntów, gospodarki wodno-ściekowej oraz warunków hydrometeorologicznych. Wody rzeki Głównej w latach 1996–2009 charakteryzowały się stanem poniżej dobrego. Decydowały o tym podwyższone wartościami BZT₅ i fosforu ogólnego oraz wysokie wartości azotu Kjeldahla i fosforanów. Przeprowadzona analiza wykazała, że w latach 1996–2009 obserwowano wzrost odczynu wody oraz spadek stężeń azotu amonowego i zawartości substancji rozpuszczonych. Uporządkowanie gospodarki wodno-ściekowej w gminach położonych na terenie zlewni nie wpłynęło istotnie na poprawę stanu fizykochemicznego wód rzeki Głównej.
The paper presents the analysis of results of trend changes in physicochemical state of the Główna river in Poznan in the years 1996–2009. Physicochemical state was characterized by 11 parameters: dissolved oxygen (O₂), BOD₅, conductivity (μS), dissolved substances (mg), pH, ammonia nitrogen (N_NH4), Kjeldahl nitrogen (N^I), nitrate nitrogen (NNO3), total nitrogen (NII), phosphates (PO4) and total phosphorus (P). The results were analyzed with respect to changes in land use, water and wastewater management and hydrometeorological conditions. Due to high concentrations of Kjeldahl nitrogen and phosphates, elevated concentrations of BOD5 and total phosphorus, physicochemical state of the Główna river was less than good. The results of the analysis proved that pH was increased, concentration of ammonia nitrogen and contents of dissolved substances was decreased. Organization of water and wastewater management in communes located in the analyzed catchment has not significantly influenced the physicochemical state of waters of the Główna river.

Źródło:

Inżynieria Ekologiczna; 2015, 44; 154-161
2081-139X
2392-0629

Pojawia się w:

Inżynieria Ekologiczna

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 76.

Tytuł:

Parametry energetyczne i aspekt ekologiczny zasilania silnika ZS paliwem mineralnym pochodzenia roślinnego
Energy parameters and the ecological aspect of engine powering by mineral fuel derived from vegetables

Autorzy:

Ambrozik, A.
Jakóbiec, J.

Powiązania:

https://bibliotekanauki.pl/articles/291323.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

biopaliwo RME
właściwości fizykochemiczne
parametry energetyczne
RME biofuel
physicochemical properties
energy parameters

Opis:

W pracy zamieszczono informacje dotyczące obecności na rynku nowych biokomponentów olejów napędowych w tym biopaliw o odmiennych właściwościach fizykochemicznych pod względem struktury chemicznej. Sytuacja ta wymaga szczegółowego poznania procesów spalania tych produktów w silniku i związków przyczynowo-skutkowych zachodzących pomiędzy tymi procesami i ich wpływu na kształtowanie parametrów pracy silnika i poziom emisji spalin. Zwrócono uwagę na uwarunkowania techniczne związane z zasilaniem silników o zapłonie samoczynnym biopaliwem.
The paper contains information concerning the presence of new biocomponents of diesel oil on the market, including biofuels with different physical and chemical properties in respect of the chemical structure. This situation requires a thorough understanding of processes involving the combustion of these products in an engine, as well as cause and effect relationships occurring between these processes and their impact on the progress operation parameters of the engine as well as the level of gas emission. The authors focused their attention on the technical conditions related to powering of self-ignition engines with biofuel.

Źródło:

Inżynieria Rolnicza; 2009, R. 13, nr 5, 5; 25-31
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 77.

Tytuł:

Pollution discharge Scenario of Dyeing Industries along Dombivali Industrial Belt of Mumbai, India

Autorzy:

Singare, S. S.
Dhabarde, S. S.

Powiązania:

https://bibliotekanauki.pl/articles/412448.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

industrial effluents
physicochemical properties
heavy metals
dyeing industries
Dombivali industrial belt
Mumbai

Opis:

The paper deals with monitoring of pollution arising due to dyeing industries located along the Dombivali industrial belt of Mumbai, India. The study was carried for the period of one year from June, 2012 to May, 2013 to study the level of toxic heavy metals and the physico-chemical properties of waste water effluents discharged from the above industries. The concentrations of Cu, Ni, Cr, Pb, Fe and Zn were found to be maximum of 44.78, 2.50, 1.75, 1.45, 64.22 and 13.22 ppm respectively in the industrial waste water effluent.It was observed that the pH value was maximum of 12.30 in the month of June while the conductivity was found to be maximum of 48000 μmhos/cm in the month of February. The majority of physco-chemical parameters like alkalinity, salinity and total solid content (TS) were observed to be maximum in the month of February having values of 3578, 44.08 and 40450 ppm respectively. The high cyanide (0.18 ppm) and phosphate (112.90 ppm) levels were reported in the effluents released during the month of March. The industrial effluent released in the month of June was reported to have high hardness, chloride and COD content having the values of 743, 2381, 8957 ppm respectively; while the DO content was found to be very low of 2.77 ppm. The BOD content in the effluents was found to be maximum of 603 ppm in the month of October. The results of present study indicates that the existing situation if mishandled can cause irreparable ecological harm in the long term well masked by short term economic prosperity due to extensive industrial growth.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 3; 48-55
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 78.

Tytuł:

Pollution Scenario due to discharge of effluent from Agrochemicals and Pesticides Manufacturing Industries of Dombivali Industrial Belt of Mumbai, India

Autorzy:

Singare, P. U.
Dhabarde, S. S.

Powiązania:

https://bibliotekanauki.pl/articles/412480.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

industrial effluents
physicochemical properties
heavy metals
agrochemicals
pesticides
Dombivali industrial belt
Mumbai

Opis:

The paper deals with monitoring of pollution arising due to agrochemicals and pesticides manufacturing industries located along the Dombivali industrial belt of Mumbai, India. The study was carried for the period of one year from June, 2012 to May, 2013 to study the level of toxic heavy metals and the physico-chemical properties of waste water effluents discharged from the above industries. The average concentration of Cu, Ni, Cr, Pb and Zn was found to be maximum of 29.86, 0.90, 1.16 and 1.19 ppm respectively in summer season, while average Fe concentration was maximum of 51.10 ppm in winter season. The average pH value of the effluent was found to be maximum of 12.95 in summer season, while average conductivity value was maximum of 21085 μmhos/cm in rainy season. The majority of physco-chemical parameters like alkalinity, hardness, salinity, chloride, cyanide, phosphate, total solid, BOD and COD content were found to be maximum in summer season having the average values of 1918, 186, 4, 11.20, 0.07, 81, 6391, 685 and 2556 ppm respectively. The average DO content was found to be low of 4.5 ppm in winter season. It was observed that the concentration level of majority of the toxic heavy metals and physico-chemical properties were above the tolerable limit set for inland surface water. The results of present study indicates that the existing situation if mishandled can cause irreparable ecological harm in the long term well masked by short term economic prosperity due to extensive industrial growth.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 3; 8-15
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 79.

Tytuł:

Microemulsion and microemulsion based gel of Zaleplon for transdermal delivery: Preparation, optimization, and evaluation

Autorzy:

Naeem, Muhammad

Powiązania:

https://bibliotekanauki.pl/articles/895597.pdf

Data publikacji:

2019-06-28

Wydawca:

Polskie Towarzystwo Farmaceutyczne

Tematy:

Microemulsion components
MEBG
BBD
physicochemical properties
in vitro studies
In Vivo studies

Opis:

In this work solubility and permeability of BCS II drug Zaleplon was increased by loading it into microemulsion which in turns enhance bioavailability. Carbomer 940 was incorporated to fabricate microemulsion based gel (MEBG) which sustained transdermal delivery. Solubility studies screened Castor oil, Tween 80 (surfactant), and Polyethylene glycol 200 (co-surfactant) for preparing Microemulsion. Pseudoternary phase diagrams were used to find out microemulsion region. Box Behnken Design (BBD) was used to optimize microemulsions which were initially investigation for physicochemical characteristics. Oil, Smix and water; Q24, Flux and lag time were selected as independent and dependent variables, respectively. Franz diffusion cell was used to compare in vitro permeability of optimized microemulsions across Rabbit skin. Variables were related using mathematical equations and response surface plots. MEBG was compared for stability, in-vitro drug permeation, skin irritation and anti-inflammatory studies using control gel and in-vivo bioavailability study with oral tablet. Microemulsions showed physiological pH of 5.36 - 5.98, conductivity of 140 - 186 μS/cm, isotropic value of 1.340 - 1.417, average droplet size of 63 - 89 nm, homogeneity, droplet size of 53 - 161 cP and spherical shape. Predicted values of optimized microemulsions were in reasonable agreement with experimental values. Formulations were stable and non-irritating to the skin. Significant difference was investigated when comparing percent inhibition of edema of MEBG (85%) and control gel (42%) with standard. MEBG behavior differed significantly from oral tablet formulation in vivo bioavailability. Such BBD based estimation will reduce time and cost in drug designing, delivery and targeting.

Źródło:

Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 543-561
0001-6837
2353-5288

Pojawia się w:

Acta Poloniae Pharmaceutica - Drug Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 80.

Tytuł:

Determination of oil and biodiesel content, physicochemical properties of the oil extracted from avocado seed (Persea americana) grown in Wonago and Dilla (gedeo zone), southern Ethiopia

Autorzy:

Hiwot, Tsegay

Powiązania:

https://bibliotekanauki.pl/articles/1193051.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

avocado seed oil
biodiesel
Soxhlet extraction
physicochemical properties
Wonago
Dilla
n-hexane

Opis:

The avocado seeds were collected from Dilla and Wonago in gedeo zone, southern part of Ethiopia for oil extraction and biodiesel production. The collected seeds were oven dried and crushed in to powder by mortar and pestle. A soxhlet extraction was used for extraction of the oil. The solvent used for oil extraction was n-hexane. The extracted oil was separated from the solvents by vacuum rata evaporator. The oil content, biodiesel content and the physico-chemical parameters of the oil as well as the biodiesel were determined .The oil content and biodiesel content is 27.6% and 95.2% for avocado seed grown in wonago and 27.2% and 94.86% for avocado seed grown in Dilla respectively. The physico-chemical parameters of the oil and biodiesel were determined and the result shows that the acid value of (4, 4.3, 0.89, 0.92), saponification value (223, 219), Kinematic viscosity (36, 7, 5.02, 37.44, 5.15), Density (933, 882, 936, 884 g/ml), Higher heating (38, 40.5, 37, 40), Ester content (95.2, 94.86) respectively. Based on the GC-MS analysis of the biodiesel, four FAME compounds were identified. These are methyl palmitate, methyl linoleate, methyl oleate and methyl stearate. From the physicochemical properties of the biodiesel determined avocado seed oil methyl ester could be used as an alternative energy resource in diesel engine.

Źródło:

World Scientific News; 2016, 58; 133-147
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 81.

Tytuł:

Regresyjny model procesu klasyfikacji ziaren skrajnie drobnych
Regressive model of ultrafine particles classification process

Autorzy:

Tajchman, Z.

Powiązania:

https://bibliotekanauki.pl/articles/349928.pdf

Data publikacji:

2009

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

klasyfikacja przepływowa
fizykochemiczne parametry
analiza regresji
flowing classification
physicochemical parameters
regression analysis

Opis:

Po przeprowadzeniu oceny podstawowych wskaźników oceny procesu wywodzących się głównie z krzywej Trompa wybrano do dalszych badań te, które wydają się najbardziej odpowiednie do oceny przebiegu procesu. Do badań wybrano trzy materiały modelowe o składzie ziarnowym do 60 mikrometrów tj.: szkło kwarcowe, piasek kwarcowy, baryt, a także trzy zmienne parametry prowadzenia procesu klasyfikacji przepływowej: temperatura, koncentracja objętościowa zawiesiny, stężenie jonów wodorowych środowiska prowadzenia procesu. Opis stanu rozpoznania elementarnych zjawisk składających się na proces klasyfikacji jednoznacznie określa również stan budowy modeli tego procesu. Ich ogólną cechą jest podejście deterministyczne połączone z wprowadzeniem bardzo znacznych uproszczeń. Spowodowane to jest w głównej mierze brakiem możliwości pomiaru w trakcie prowadzenia procesu szeregu zjawisk elementarnych. Wprowadzone do wzorów stałe współczynniki i poprawki mają z reguły wartości wyznaczane doświadczalnie, które nie pozwalają jednak na jednoznaczną interpretację wszystkich zjawisk zachodzących w trakcie procesu klasyfikacji, Nie wyczerpuje to złożoności problemu, gdyż w opisie procesu należy uwzględnić oddziaływania o charakterze losowym. Losowość procesu powoduje bowiem znaczne trudności w określaniu związków pomiędzy poszczególnymi zjawiskami elementarnymi, a także w precyzyjnej identyfikacji pełnego zespołu czynników wpływających na przebieg i wyniki procesu.
The paper presents the issues relied to the description and the basic technological factors of flowing classification process, which main medium were suspensions of chosen model materials ultra fine particles. After conduction of basic process factors evaluation, which originated mainly from the Tromp curve, the ones seemed to be the most appropriate to evaluate the process were chosen for the further research. Three model materials were selected: quartz glass; quartzite; barite. Furthermore, three changeable parameters of flowing classification process conduction were chosen, which were: temperature; volumetric concentration of the suspension; concentration of hydrogen ions of process conduction environment. The results of chosen process parameters significant influence on elementary phenomena occurring during particles (of sized up to 60 mim) separation process were presented, as well the results of viscosity and suspension stability. The described state of elementary phenomena recognition being the part of classification process determines unequivocally the state of models construction of this process. Their general feature is deterministic approach joined with introduction of significant simplifications. This is caused mainly by lack of many elementary phenomena measuring possibilities during the process conduction. The constant coefficients introduced to the equation, which, however, do not allow the unequivocal interpretation of all of the phenomena occurring during the classification process. This do not solve the complexity of the problem because the random interactions should be considered in process description. The randomness of the process causes many difficulties in determination of correlations between individual elementary phenomena and also in precise identification of full group of factors influencing on course and results of the process. Only in recent years, the random interactions are introduced in various range to existed deterministic process models.

Źródło:

Górnictwo i Geoinżynieria; 2009, 33, 4; 299-308
1732-6702

Pojawia się w:

Górnictwo i Geoinżynieria

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 82.

Tytuł:

Cellular wood material properties - review

Autorzy:

Iejavs, J.
Spulle, U.

Powiązania:

https://bibliotekanauki.pl/articles/52740.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna

Tematy:

cellular wood material
wood industry
innovation
material property
physicochemical property
physicomechanical property

Źródło:

Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2016, 59, 198
1644-3985

Pojawia się w:

Drewno. Prace Naukowe. Doniesienia. Komunikaty

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 83.

Tytuł:

Physico-chemical groundwater conditions at Salix lapponum stands in Eastern Poland

Autorzy:

Serafin, A.
Pogorzelec, M.
Banach, B.
Szczurowska, A.
Mielniczuk, J.

Powiązania:

https://bibliotekanauki.pl/articles/41553.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

physicochemical condition
ground water
Salix lapponum
stand
ecological succession
Eastern Poland
Polska

Opis:

A subarctic-boreal relict species, Salix lapponum, found within the area of the Łęczna-Włodawa Lakeland (Eastern Poland), is particularly threatened with extinction due to the southern limit of its range and the specific conditions of its occurrence. This conclusion is evidenced by a systematic reduction in the number of its locations, which is accompanied by a decrease in the numbers of individuals making up its populations. The aim of the present study was to determine habitat conditions of the occurrence of Salix lapponum populations on the basis of an analysis of physico-chemical factors of groundwater at the sites associated with various stages of succession taking place in small peatland water bodies. The results of this study confirm the trend that the stands and population numbers of this species are decreasing with the intensification of ecological succession and the degree of its progress and at the same time show that this species exhibits a wide amplitude of many of the investigated factors. Among the groundwater parameters under investigation, the low level of total nitrogen, phosphorus fraction and DOC as well as the high level of Ca, pH and electrolytic conductivity can be considered to be a set of conditions that promote the maintenance of Salix lapponum populations. On the other hand, in the case of nitrates, nitrites, sulphates as well as the Na, K and Mg ions, the Kruskal-Wallis statistical test showed that the distribution of their values was invariant in relation to the studied habitats, which is probably evidence that they do not determine the development or extinction of the investigated populations in these habitats.

Źródło:

Dendrobiology; 2015, 73
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 84.

Tytuł:

Analysis of interspecies physicochemical variation of grain legume seeds

Autorzy:

Rybinski, W.
Rusinek, R.
Szot, B.
Bocianowski, J.
Starzycki, M.

Powiązania:

https://bibliotekanauki.pl/articles/25147.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

interspecies variation
physicochemical variation
grain legume
seed
thickness
protein
fat
fatty acid

Opis:

The paper presents an attempt to assess the reaction of seeds to mechanical loads taking into account their geometry expressed as seed thickness and 1000 seed weight. The initial material comprised 33 genotypes of grain legume plants and included cultivars registered in the country and breeding lines that are subject to pre-registration trials. The analysis of variance revealed significant diversity of the cultivars and lines of the species studied in terms of each of the analysed trait. The highest weight of 1000 seeds were obtained for white lupine seeds and peas, the lowest for andean lupine seeds. The maximum deformation and energy were obtained for white lupine seeds, the lowest for pea seeds, the maximum force and module the lowest values were determined for narrow-leafed lupine and pea. The highest values of protein were obtained for andean and yellow lupine, a fat content for andean and white lupine. The fatty acid profile as much as 70% or more were linoleic and oleic acids. Against the background of all the species are distinguished by white lupine seeds with a high content of oleic acid and the lowest of linoleic acid, for yellow lupine were obtained the inverse ratio of the two acids.

Źródło:

International Agrophysics; 2014, 28, 4
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 85.

Tytuł:

Badania jakości kleszczy ekstrakcyjnych używanych w stomatologii
Quality tests for forceps extraction used in dentistry

Autorzy:

Drabek, K.
Lisoń, J.
Krawczyk, C.
Radwin, E.
Czerwik, M.

Powiązania:

https://bibliotekanauki.pl/articles/99111.pdf

Data publikacji:

2018

Wydawca:

Politechnika Śląska. Katedra Biomechatroniki

Tematy:

kleszcze ekstrakcyjne
własności fizykochemiczne
jakość powierzchni
forceps extraction
physicochemical properties
surface quality

Opis:

Celem badań była ocena jakości kleszczy ekstrakcyjnych stosowanych w stomatologii zgodnie z normą PN-EN ISO 9173-1:2006. W ramach badań przeprowadzone zostały badania metalograficzne mikroskopowe, pomiary twardości, obserwacje makroskopowe powierzchni, pomiary chropowatości powierzchni oraz odporności korozyjnej analizowanej postaci narzędzia. Analizowane kleszcze ekstrakcyjne kwalifikujemy do narzędzi nie spełniających określonych zaleceń, ponieważ nie uzyskało wyniku pozytywnego w jednym z wymienionych badań. Na podstawie obserwacji makroskopowych stwierdzono zróżnicowaną ilość rys, wgnieceń oraz wykruszeń.
The aim of the research was to assess the quality of extraction forceps used in dentistry in accordance with the PN-EN ISO 9173-1: 2006 standard. As part of the research, microscopic metallographic examinations, hardness measurements, macroscopic observations of the surface, surface roughness measurements and corrosion resistance of the analyzed tool were carried out. We qualify the extracted extraction tines for tools that do not meet specific recommendations because they did not achieve a positive result in one of the mentioned tests. On the basis of macroscopic observations, a different number of cracks, dents and cracks were found.

Źródło:

Aktualne Problemy Biomechaniki; 2018, 16; 5-11
1898-763X

Pojawia się w:

Aktualne Problemy Biomechaniki

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 86.

Tytuł:

Ocena ścieków browarnianych w wybranych punktach linii technologicznej
The assessment of brewery wastewater from chosen points of the production line

Autorzy:

Krzyśko-Łupicka, T.
Błaszczyk, K.

Powiązania:

https://bibliotekanauki.pl/articles/125725.pdf

Data publikacji:

2016

Wydawca:

Towarzystwo Chemii i Inżynierii Ekologicznej

Tematy:

ścieki browarniane
ocena mikrobiologiczna
analiza fizykochemiczna
brewery wastewater
microbiological assessment
physicochemical analysis

Opis:

Źródłem ścieków browarnianych są: warzelnia, fermentownia, leżakownia, rozlewnia oraz miejsce mycia opakowań. W zależności od etapu produkcyjnego ścieki te cechują zróżnicowane parametry mikrobiologiczne i fizykochemiczne. Ze względu na dużą zawartość substancji organicznych mogą one stanowić pożywkę dla różnych grup mikroorganizmów. Celem badań była ocena mikrobiologiczna ścieków browarnianych w trzech różnych punktach linii technologicznej ze szczególnym uwzględnieniem obecności mikroorganizmów potencjalnie chorobotwórczych. Materiał badawczy stanowiły ścieki pobrane z komór zbierających ścieki 1 i 2 oraz kolektora przy wylocie do rzeki. Badania mikrobiologiczne obejmowały oznaczenia ogólnej liczby mikroorganizmów mezofilnych, psychrofilnych, proteolitycznych, drożdży i grzybów strzępkowych, bakterii grupy coli (metodą fermentacyjną probówkową) oraz mikroorganizmów potencjalnie chorobotwórczych. Oznaczenia fizykochemiczne wykonano z uśrednionych 24-godzinnych ścieków surowych i obejmowały oznaczenia: pH, BZT5, ChZT, utlenialności zawiesiny ogólnej, form azotu, fosforu ogólnego, chlorków i siarczanów. Najwyższy stopień zanieczyszczenia mikrobiologicznego cechował komorę 1, odbierającą ścieki z warzelni, fermentowni, leżakowni i bytowo-gospodarcze, oraz kolektor wylotowy ścieków. Wysoka liczba mikroorganizmów mezofilnych i psychrofilnych wskazuje na dużą ilość łatwo przyswajalnej materii organicznej. Natomiast 10-krotnie wyższa liczebność bakterii mezofilnych spowodowana była podwyższoną temperaturą ścieków. Wysokie pH (9,85) sprzyjało procesom proteolizy, co potwierdza wysoka liczba mikroorganizmów proteolitycznych (4,2·105 jtk·cm–1). Wysoki udział azotu amonowego w azocie ogólnym wskazuje na zahamowanie procesów nitryfikacji. Obecność w ściekach bakterii potencjalnie chorobotwórczych z rodziny Enterobacteriaceae i rodzajów Pseudomonas, Staphylococcus, Streptococcus, jak również wysokie miano coli wskazują, że surowe ścieki stwarzają zagrożenie zarówno dla pracowników, jak i środowiska.
The sources of brewery wastewater are: brewhouse, fermentation room lagering room, bottling plant and packaging washing place. Depending on the stage of the production the sewage are characterized by varying microbiological and physico-chemical parameters. Due to the high content of organic matter it may provide a medium for different microorganisms groups. The aim of the study was to evaluate the microbiological content of brewery wastewater at three different points of the production line, with particular emphasis on the presence of potentially pathogenic microorganisms. The research material was collected from the chambers with sewage 1 and 2 and from the collector at the outlet into the river. Microbiological testing included the designation of the total number of mesophilic, psychrophilic, proteolytic microorganisms, yeast and filamentous fungi, coliforms using the fermentation tubes method and potentially pathogenic microorganisms. Physical and chemical designations were made of 24-hour average raw sewage and included: pH, BOD5, COD, oxidisability of total suspended solids, forms of nitrogen, total phosphorus, chloride and sulphates. The highest level of microbial contamination was found in chamber 1, receiving wastewater from the brewhouse, fermentation room, lagering room, utility room and the outlet collector. The high number of mesophilic and psychrophilic microorganisms indicates a large amount of easily digestible organic matter. However, the 10-times higher number of mesophilic bacteria was caused by the increased temperature of wastewater. High pH (9.85) favored the process of proteolysis, which is confirmed by the high number of proteolytic microorganisms (4.2·105 cfu·cm–1). The high contribution of ammonium nitrogen in the nitrogen generally indicates the inhibition of nitrification. The presence in the wastewater potentially pathogenic bacteria of the Enterobacteriaceae family and the genera Pseudomonas, Staphylococcus, Streptococcus, as well as high coliform count show, that raw sewage pose a threat to both workers and the environment.

Źródło:

Proceedings of ECOpole; 2016, 10, 1; 201-207
1898-617X
2084-4557

Pojawia się w:

Proceedings of ECOpole

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 87.

Tytuł:

Ocena mikrobiologiczna niepasteryzowanych soków owocowych i warzywnych
Microbiological evaluation of unpasterized fruit and vegetable juices

Autorzy:

Nabrdalik, M.
Świsłowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/126017.pdf

Data publikacji:

2017

Wydawca:

Towarzystwo Chemii i Inżynierii Ekologicznej

Tematy:

sok niepasteryzowany
parametry fizykochemiczne
jakość mikrobiologiczna
unpasterized juice
physicochemical parameters
microbiological quality

Opis:

Celem pracy była ocena parametrów fizykochemicznych oraz mikrobiologicznych niepasteryzowanych soków owocowych i warzywnych podczas próby przechowalniczej. Analizie poddano takie parametry fizykochemiczne, jak: pH, kwasowość ogólną, gęstość względną oraz zawartość ekstraktu. W badaniach mikrobiologicznych określono ilość mikroorganizmów oraz przeprowadzono ocenę jakościową badanych soków. Przetrzymywanie otwartych soków przez jedną godzinę w temperaturze pokojowej nie wpłynęło istotnie na zmianę parametrów fizykochemicznych. W trakcie badań odnotowano wzrost ogólnej liczby drobnoustrojów, stwierdzono obecność bakterii grupy coli oraz bakterii rodzaju Pseudomonas. Nie stwierdzono obecności Salmonella spp. oraz Staphylococcus aureus.
The aim of the study was to evaluate the physicochemical and microbiological parameters of unpasteurized fruit and vegetable juices during the storage. Physicochemical parameters such as pH, total acidity, relative density and extract content were analyzed. In microbiological studies microorganisms content was determined and quality of the juices were evaluated. Juices kept in open container for one hour at room temperature did not significantly alter the physicochemical parameters. During the study, an increase in the total number of microorganisms was observed, presence of coli forms and Pseudomonas bacteria was confirmed. No Salmonella spp. and Staphylococcus aureus were found.

Źródło:

Proceedings of ECOpole; 2017, 11, 2; 541-551
1898-617X
2084-4557

Pojawia się w:

Proceedings of ECOpole

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 88.

Tytuł:

Charakterystyka fizyczna i chemiczna wód w parkach miejskich Wrocławia i Wałbrzycha
Physical and chemical characteristics of park’s water of Wroclaw and Walbrzych

Autorzy:

Skwarka, M.
Perliceusz, N.
Kowalska-Góralska, M.
Senze, M.
Skwarka, T.

Powiązania:

https://bibliotekanauki.pl/articles/127518.pdf

Data publikacji:

2014

Wydawca:

Towarzystwo Chemii i Inżynierii Ekologicznej

Tematy:

woda
parki miejskie
parametry fizykochemiczne
Wrocław
Wałbrzych
water
urban parks
physicochemical parameters

Opis:

Badaniom poddano wodę z małych rezerwuarów wodnych zlokalizowanych w wybranych parkach miejskich Wrocławia i Wałbrzycha na przestrzeni czterech pór roku na przełomie lat 2009/2010. W analizowanym materiale oznaczono twardość, odczyn, zasadowość, przewodnictwo elektrolityczne oraz koncentrację chlorków, wapnia i magnezu. W parkowych zbiornikach wodnych zanotowano zgodne z normami prawnymi (Dz.U.2008.162.1008; Dz.U.2004.32.284) wartości analizowanych parametrów fizykochemicznych wody. Na szczególną uwagę zasługują zbiorniki zlokalizowane w parkach: Brochowskim, Grabiszyńskim, Kopernika, Szczytnickim i Tołpy (Wrocław) oraz Nowe Miasto (Wałbrzych), gdzie odczyty odbiegały od wyników zgodnych z normami.
The study involved water from small water reservoirs located in selected urban parks in Wroclaw and Walbrzych over four seasons of 2009-2010. In the analyzed material hardness, pH, alkalinity, conductivity, electrolytic, and concentration of chlorides, calcium and magnesium were determined. Majority of physicochemical water parameters from park ponds were in accordance with the Polish legal standards (Polish Journal of Laws: 2008.162.1008 and 2004.32.284) whereas tanks located in parks: Brochowski, Grabiszynski, Kopernika, Szczytnicki and Tolpy (Wroclaw) as well as Nowe Miasto (Walbrzych) - show readings differ from those quality standard.

Źródło:

Proceedings of ECOpole; 2014, 8, 2; 587-593
1898-617X
2084-4557

Pojawia się w:

Proceedings of ECOpole

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 89.

Tytuł:

Modification in Physicochemical, Structural and Digestive Properties of Potato Starch During Heat-Moisture Treatment Combined with Microwave Pre- and Post-Treatment

Autorzy:

Deng, Chunli
Melnyk, Oksana
Marenkova, Tatyana
Luo, Yanghe

Powiązania:

https://bibliotekanauki.pl/articles/2159286.pdf

Data publikacji:

2022-09-05

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

heat-moisture treatment
microwave treatment
physicochemical properties
structural properties
digestibility
potato starch

Opis:

The objective of this study was to investigate the effects of modification by heat-moisture treatment (HMT) combined with microwave pre- and post-treatment (MW) on the physicochemical, structural and digestive properties of potato starch. The light microscopy, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were used to determine the structural properties of starch. FT-IR and XRD spectra implied that MW and HMT destroyed the double helices and crystalline structure of potato starch. The relative crystallinity of modified starch granules (15.17–18.17%) was lower than that of native starch (19.39%). In the case of physicochemical properties, the modified starches had higher pasting temperature (68.8–93.0^oC) and setback viscosity (807–3168 cP), but lower peak viscosity (1315–3662 cP) and breakdown viscosity (17.3–78.3 cP) than that of native potato starch, which were 68.5^oC, 496 cP, 6598 cP and 2526 cP, respectively. The HMT and MW modifications significantly increased the content of slowly digestible starch and resistant starch. The resistant starch content of starch obtained by HMT combined with MW post-treatment was significantly higher than that of starch obtained by HMT combined with MW pre-treatment and single HMT. These results may promote good understanding of the effects of HMT combined with MW pre- and post-treatment on physicochemical properties and digestibility of potato starch, and wide utilization of microwave and heat-moisture techniques in starch modification.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2022, 72, 3; 249-261
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 90.

Tytuł:

The Needles of Aleppo Pine From the Province of Taza-Morocco – A Biomaterial of Great Potential

Autorzy:

Mahmoud, Rachid
Hjouji, Kaoutar
Mehdaoui, Imane
Saoudi Hassani, El Mokhtar
Ben Abbou, Mohamed
Majbar, Zineb
Taleb, Mustapha
Rais, Zakia

Powiązania:

https://bibliotekanauki.pl/articles/2202321.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Aleppo pine
pine needle
physicochemical characterization
spectroscopic characterization
adsorbent
biomaterial
essential oil

Opis:

The needles of the Aleppo pine (Pinus halepensis) (PA) are very abundant in the forest of the National Park of Tazekka (Ta-za-Morocco) and are unexploitable. Moreover, they constitute a potential danger because they facilitate the outbreak of wildfires. To solve this problem, we have considered turning these needles into a biomaterial that could be used as raw material for different uses, such as wastewater treatment. The biomaterial of the Aleppo pine is obtained from its needles which are harvested in spring, dried, cut, crushed, and sieved. The powder obtained is analyzed before and after the extraction of essential oil. The physicochemical and spectroscopic analyses show that this biomaterial is porous, hygroscopic, slightly acidic, moderately moist, and not very conducive. Its average density in the anhydrous state is 0.6. It is rich in carbon (79.91%) and oxygen (18.91%) in the form of aromatic compounds and ketone imprints; thus, relating the presence of cellulose, pectin, lignin, and hemicellulose. Its composition in mineral elements (Na, Mg, Ca, K, Cl, S) is deficient. Gas chromatography-mass spectrometry (GC-MS) analysis of the oils extracted from the needle powder relates that it is a complex mixture of bioactive compounds such as mono-terpenoid α and β-pinene hydrocarbons. These results show that our biomaterial can be used as an adsorbent in wastewater treatment and the extracted essential oils can be used in the pharmacological, agro-food field.

Źródło:

Journal of Ecological Engineering; 2023, 24, 1; 41--50
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 91.

Tytuł:

Genotype selection for physico-chemical fruit traits in pomegranate (Punica granatum L.) in Turkey
Selekcja genotypów według fizykochemicznych cech granatu (Punica granatum L.) w Turcji

Autorzy:

Okatan, V.
Akca, Y.
Ercisli, S.
Gozlekci, S.

Powiązania:

https://bibliotekanauki.pl/articles/11543035.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

pomegranate
Punica granatum
genetic resource
genotype selection
physicochemical trait
fruit
Turkey [geogr.]

Opis:

Pomegranate is one of the most important ancient fruit in Turkey where planting of pomegranate has increased rapidly in recent years. This study described desirable pomological and chemical traits of seventeen pomegranate genotypes selected from Narlidere district (Bitlis) in between 2010–2011 years. We found considerable variation on fruit weight, aril weight, fruit length and fruit width that important for pomegranate breeding ranged from 99.77 (N-15) to 515.97 g (N-05), 14.16 (N-01) to 41.92 g (N-10), 51.03 (N-15) to 90.99 mm (N-05) and 58.99 (N-03) to 103.11 mm (N-05) among genotypes, respectively. Chemical parameters are also considerable varied among genotypes and Soluble solid content (SSC), titratable acidity (TA), pH and juice yield of genotypes varied between 5.96 (N-02) to 9.13% (N-03), 0.12 (N-12) to 0.91% (N-14), 2.51 (N-14) to 4.52 (N-10) and 48.58 (N-06) to72.07% (N-01), respectively. Many genotypes were found to be promising both fresh consumption and processing. Promising genotypes indicate it’s importance as genetic resources and they have potential for future use in pomegranate breeding activities.
Granat jest jednym z najstarszych owoców w Turcji, a jego uprawa gwałtownie rozwinęła się w ostatnich latach. W niniejszej pracy opisano pożądane pomologiczne i chemiczne cechy siedemnastu genotypów granatu z okręgu Narlidere (Bitlis) badanych w latach 2010–2011. Stwierdzono znaczne zróżnicowanie cech granatu ważnych dla jego uprawy, takich jak masa owocu, masa osnówki oraz szerokość owocu. Ich rozpiętość wahała się odpowiednio od 99,77 (N-15) do 515.97 g (N-05), 14,16 (N-01) do 41,92 g (N-10), 51,03 (N-15) do 90,99 mm (N-05) oraz 58,99 (N-03) do 103,11 mm (N-05). Cechy chemiczne także znacznie różnicowały badane genotypy. Zawartość rozpuszczalnych substancji stałych (SSC), kwasowość ogólna (TA), pH oraz plon soku wahały się odpowiednio od 5,96 (N-02) do 9,13% (N-03), 0,12 (N-12) do 0,91% (N-14), 2,51 (N-14) do 4,52 (N-10) oraz 48,8 (N-06) do 72,07% (N-01). Stwierdzono, że jeśli chodzi o świeżą konsumpcję i przetwarzanie, jest wiele obiecujących genotypów. Genotypy te stanowia cenne źródło genetyczne, a także mają duży potencjał dla prac hodowlanych.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2015, 14, 2; 123-132
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 92.

Tytuł:

Impact of Jute Retting on Native Fish Diversity and Aquatic Health of Roadside Transitory Water Bodies: an Assessment in Eastern India

Autorzy:

Ghosh, D.
Biswas, J. K.

Powiązania:

https://bibliotekanauki.pl/articles/125476.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

transitory water bodies
physicochemical analysis
fish diversity
Shannon-Wiener Index
jute retting

Opis:

Roadside transitory water bodies being manmade depressions have a great ecological and socio-economic importance from years. The effects of agricultural runoffs, jute retting, macro-phytes infestations and inadequate rainfall in changed climate often degrade transitory water bodies’ environment while the biodiversity have impacted severely because of population pressure, over exploitation and indiscriminate use of fine meshed fishing gears as a whole. Physico-chemical and biological analysis with fish species composition, relative abundance, diversity indices like species richness, evenness and Shannon-Wiener index were carried out for pre-, during and post-jute retting season and for year mean as a whole to assess impact of jute retting on the roadside transitory water body’s environmental health and indigenous fish diversity at Sahebnagar village in Nadia District, India. All the physico-chemical parameters barring biochemical oxygen demand and water transparency remained more or less same or marginally got little changed during those three seasons. As much as 19 native fish species with varied relative abundances and dominances were identified. Jute retting impacted lower native fish diversity indices like Shannon-Wiener index values (1.94 to 2.68) clearly indicated poor to moderate pollution status of the transitory water body in that area during monsoon in particular and throughout the year in general. So we opined there should be some control over the intense jute retting in the road side transitory water bodies for sustainable management of these manmade resources.

Źródło:

Journal of Ecological Engineering; 2015, 16, 4; 14-21
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 93.

Tytuł:

Wpływ obecności powłok jadalnych na zmiany właściwości owoców dyni w czasie przechowywania®
The influence of edible coatings on the change of the properties of pumpkin fruits during storage®

Autorzy:

Kadzińska, J.
Janowicz, M.
Kalisz, S.
Sitkiewicz, I.
Mika, M.

Powiązania:

https://bibliotekanauki.pl/articles/227801.pdf

Data publikacji:

2017

Wydawca:

Wyższa Szkoła Menedżerska w Warszawie

Tematy:

powłoka jadalna
dynia
właściwości fizykochemiczne
przechowywanie
edible coating
pumpkin
physicochemical properties
storage

Opis:

Zastosowanie powłok jadalnych na bazie karboksymetylocelulozy oraz karboksymetylocelulozy i wosku pszczelego pozwala przedłużyć okres przechowywania owoców dyni olbrzymiej o cztery tygodnie w porównaniu do owoców niepowleczonych. Jednocześnie zachowana zostaje wysoka jakość przechowywanego surowca.
The application of edible coatings based on carboxymethylcellulose and carboxymethylcellulose with beeswax enables to extend the shelf-life of pumpkin fruits for four weeks in comparison to uncoated fruits. At the same time, a high quality of the stored raw material is maintained.

Źródło:

Postępy Techniki Przetwórstwa Spożywczego; 2017, 2; 37-45
0867-793X
2719-3691

Pojawia się w:

Postępy Techniki Przetwórstwa Spożywczego

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 94.

Tytuł:

Long-term cyanobacterial dynamics as related to physicochemical water parameters in a restored urban lake

Autorzy:

Zebek, E.

Powiązania:

https://bibliotekanauki.pl/articles/1189822.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

Cyanoprokaryota
dynamics
physicochemical parameter
water parameter
urban lake
lake
restoration
nutrient

Opis:

The aim of this study has been to determine the response of cyanobacteria to the lake protection and restoration measures implemented in the littoral zone of an urban lake called Jeziorak Mały. The first investigations were conducted in 1996 and were resumed in 1997-2003, 2005 and 2013, following the installation of a separator and the creation of stone accumulation sites. Long-term changes in phytoplankton cyanobacterial proportions, abundance and biomass were analyzed in relation to environmental conditions at the sites in the littoral zone (S – separator pipes, K – sites with stones and R – sites with macrophytes). Relationships between cyanobacteria and water chemistry variables were analyzed by calculating the Spearman’s rank correlation coefficient, and then with canonical correspondence analysis (RDA). The results provided evidence that water temperature, total nitrogen and iron concentration (S, R), but also PO43- in spring (S,K) were the principal factors affecting cyanobacterial development. There was a significant decrease in the share, abundance and biomass of cyanobacteria coinciding with a decrease in conductivity and PO43- following the onset of lake restoration efforts. Changes in dominant species from the ones typical in hypertrophic lakes to those typically found in eutrophic lakes took place during the research. The modifications indicated a strong initial response of cynaobacteria to the restoration measures, but the situation stabilized in 2013, when cyanobacteria returned to their previous average levels. This suggests that the introduction of lake restortation measures contributed to the lake’s improved water quality and they should be retained for efficient lake management in the future.

Źródło:

Journal of Elementology; 2016, 21, 1; 269-282
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 95.

Tytuł:

Phytoplankton response to changes of physicochemical variables in Lake Nasser, Egypt

Autorzy:

Hussian, A.-E. M.
Napiorkowska-Krzebietke, A.
Toufeek, M.E.F.
El-Monem, A.M.A.
Morsi, H.H.

Powiązania:

https://bibliotekanauki.pl/articles/961602.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

phytoplankton
density
physicochemical variation
nutrient
chlorophyll a
diatom
Lake Nasser
Egypt

Opis:

Seasonal and spatial changes of phytoplankton in relation to environmental variables affecting the water quality were investigated along the main channel of Lake Nasser throughout 2013. In total, 104 phytoplankton species, belonging to 7 classes, were identified. Phytoplankton assemblages were dominated by Bacillariophyceae, Cyanophyceae and Chlorophyceae, whereas Dinophyceae, Euglenophyceae, Chrysophyceae and Cryptophyceae were infrequent. Cyclotella glomerata, C. ocellata and Aulacoseira granulata represented the most abundant species among Bacillariophyceae. Cyanophyceae was dominated by Planktolyngbya limnetica and Eucapsis minuta, and Chlorophyceae by Ankistrodesmus fusiformis and Staurastrum paradoxum. The water column was thermally stratified during summer, while being mixed throughout winter. Phytoplankton features and physicochemical variables were analyzed with the principal component analysis. Electrical conductivity and water temperature were the most common factors negatively controlling phytoplankton density. Phytoplankton density was positively associated with NO3, whereas it was negatively correlated with PO4 and HCO3. Cyanophyceae were strongly adapted to the environmental variables and NO2 was limiting their growth. Chlorophyceae were more dependent on PO4 than NO3. The vertical distribution of Chl a was associated with the summer thermal stratification and its concentration increased southwards. Chl a was affected by NO2 and linked to Chlorophyceae. The regional variations of phytoplankton reflected its response to varying environmental conditions. The annual average of the trophic state index indicated eutrophic waters of Lake Nasser.

Źródło:

Journal of Elementology; 2015, 20, 4
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 96.

Tytuł:

Chemical stability assessment of soft magnetic composites for biomedical applications

Autorzy:

Powojska, Anna
Niewęgłowska, Joanna
Suska, Sylwia
Cavadas, Adelio
Mystkowska, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/2058401.pdf

Data publikacji:

2022

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

silicone-based composite
magnetic material
physicochemical properties
incubation
ICP-MS analysis

Opis:

Silicone-based elastic composites with a metallic filler have been strongly developed in recent years. These materials are considered applicable in many fields of science, including medicine. The advantageous mechanical parameters provided by the NdFeB micropowder reinforcement are balanced by the elasticity and biocompatibility guaranteed by the silicone matrix. So far, there have been several reports regarding such composites’ properties important from the biomedical point of view. The article deals with the physicochemical parameters of the new material for medical applications as well as the properties of the incubation liquid. The aim of the work was to determine effects of both the magnetic particles content (0, 30, 50, 70 wt%) and the incubation process under physiological conditions on the physicochemical properties of the material and the solution after incubation. The samples were incubated for various periods of time (8, 16 and 24 weeks) at the temperature of 37°C in a 0.9 wt% NaCl solution. The density, water contact angle, and water absorption of the materials were measured. The electrolytic conductivity, pH value, redox potential, surface tension, and kinematic viscosity were determined for the liquids after the materials incubation. The results obtained for pure silicone and the silicone-based composite reinforced with NdFeB microparticles were compared. The results indicate that incubation affects the samples and liquids, changing their physiochemical properties. For composites, the density decreased, which results in a noticeable concentration of the examined elements in the solutions.

Źródło:

Engineering of Biomaterials; 2022, 25, 164; 2--8
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 97.

Tytuł:

Biological and physicochemical changes in Orthic Luvisol in relation to the cultivation system

Autorzy:

Dabek-Szreniawska, M.
Sokolowska, Z.
Wyczolkowski, A.I.
Hajnos, M.
Kus, J.

Powiązania:

https://bibliotekanauki.pl/articles/25655.pdf

Data publikacji:

2002

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

organic matter
Orthic Luvisol
physicochemical change
microorganism
biological change
cultivation system

Źródło:

International Agrophysics; 2002, 16, 1
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 98.

Tytuł:

Monitoring the health of sediment ecosystem along the Mahim Creek of Mumbai - a study of physico-chemical properties

Autorzy:

Singare, P.U.
Ferns, S.E.L.

Powiązania:

https://bibliotekanauki.pl/articles/11793.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

monitoring
health
sediment ecosystem
conductivity
Mahim Creek
Mumbai city
physicochemical property

Opis:

The present study was performed for the period of one year from June 2012 to May 2013 in order to understand the physico-chemical properties of sediments samples collected along the Mahim Creek of Mumbai. The annual average pH value of the creek sediments was recorded as 9.22. It is feared that such conditions may increase the alkalinity of Creek water which according to USEPA will increase the physiological stress of many aquatic species resulting in decreased reproduction, decreased growth, disease, or death thereby reducing the biological diversity of the Creek. The total organic matter in the creek sediments was found to be maximum of 10.30 % with an annual average concentration of 6.29 %. Although organic matter is a primary source of food for benthic organisms and is important in maintaining a viable ecosystem, too much of organic matter deposited in the sediments will be responsible for depletion in dissolved oxygen content of the creek water causing unpleasant odours and may also increase the rate of eutrophication. From the results it appears that as India moves towards stricter regulation of industrial effluents to control water pollution, greater efforts are required to control the discharge of pollutants into the ecosystems.

Źródło:

International Letters of Natural Sciences; 2014, 12, 1
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 99.

Tytuł:

Long-term cyanobacterial dynamics as related to physicochemical water parameters in a restored urban lake

Autorzy:

Zebek, E.

Powiązania:

https://bibliotekanauki.pl/articles/16004.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

Cyanoprokaryota
dynamics
physicochemical parameter
water parameter
urban lake
lake
restoration
nutrient

Opis:

The aim of this study has been to determine the response of cyanobacteria to the lake protection and restoration measures implemented in the littoral zone of an urban lake called Jeziorak Mały. The first investigations were conducted in 1996 and were resumed in 1997-2003, 2005 and 2013, following the installation of a separator and the creation of stone accumulation sites. Long-term changes in phytoplankton cyanobacterial proportions, abundance and biomass were analyzed in relation to environmental conditions at the sites in the littoral zone (S – separator pipes, K – sites with stones and R – sites with macrophytes). Relationships between cyanobacteria and water chemistry variables were analyzed by calculating the Spearman’s rank correlation coefficient, and then with canonical correspondence analysis (RDA). The results provided evidence that water temperature, total nitrogen and iron concentration (S, R), but also PO43- in spring (S,K) were the principal factors affecting cyanobacterial development. There was a significant decrease in the share, abundance and biomass of cyanobacteria coinciding with a decrease in conductivity and PO43- following the onset of lake restoration efforts. Changes in dominant species from the ones typical in hypertrophic lakes to those typically found in eutrophic lakes took place during the research. The modifications indicated a strong initial response of cynaobacteria to the restoration measures, but the situation stabilized in 2013, when cyanobacteria returned to their previous average levels. This suggests that the introduction of lake restortation measures contributed to the lake’s improved water quality and they should be retained for efficient lake management in the future.

Źródło:

Journal of Elementology; 2016, 21, 1
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 100.

Tytuł:

Badania składu mineralno-chemicznego odpadu ze zmodyfikowanego procesu otrzymywania chromianu (VI) sodu
Investigation of physicochemical composition of chromium waste deriving from modified process of sodium(VI) chromate production

Autorzy:

Natanek, W.
Jarosiński, A.

Powiązania:

https://bibliotekanauki.pl/articles/272398.pdf

Data publikacji:

2008

Wydawca:

Górnośląska Wyższa Szkoła Pedagogiczna im. Kardynała Augusta Hlonda

Tematy:

skład chemiczny
chromian sodu
odpad
utylizacja
physicochemical composition
waste
sodium chromate

Opis:

Zastosowanie nowej technologii otrzymywania chromiany (VI) sodu pozwoliło na redukcję powstających odpadów z 4 ton do 2,5 tony na tonę produktu finalnego. Jednocześnie zmiana namiaru wpłynęła na zmianę właściwości powstającego odpadu chromowego. Podjęto kroki w celu określenia właściwości fizykochemicznych powyższego odpadu, co umożliwi wybór racjonalnych kierunków jego zagospodarowania. W celu określenia składu chemicznego i mineralnego tych odpadów zastosowano rentgenograficzną analizę scaningową i analizę mikroskopową. Z otrzymanych danych wynika, że odpady są materiałem o zróżnicowanych cechach fizykochemicznych. Zawartość chromu w odpadach jest niższa niż w odpadach pochodzących z klasycznego procesu wytwarzania chromianu (VI) sodu. Dane te potwierdzają poprawę efektywności wykorzystania rudy chromowej w procesie wytwarzania chromianu (VI) sodu, Jednocześnie zostaje ograniczona ilość dotychczas stosowanego wypełniacza jakim jest dolomit.
Chromium waste, a by-product of sodium chromate(VI) production is produced in large quantities worldwide. These waste contain impurities of environmental concern such as water-soluble compounds of Cr(VI) and other chromium compounds. This study was undertaken to obtain detailed information on the physicochemical properties of chromium waste deriving from the modified process of sodium chromate obtaining, the basic intermediate product from which other chromium compounds are obtained. Acquaintance of physicochemical characteristics of tested waste material should allow choice of rational way of its utilization and determination of possibilities of chromium concentrate obtaining from initial waste material. The microscopic and electron microscope were applied to determine the phase composition. On the basis of the chemical composition and quantitative results of the phase analysis the quantitative composition of discussed material was determined. It was found that the chromium waste from modified process of sodium chromate(VI) obtaining differs in physicochemical properties in relation to these waste deriving from the dolomite metod.

Źródło:

Problemy Ekologii; 2008, R. 12, nr 2, 2; 67-68
1427-3381

Pojawia się w:

Problemy Ekologii

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce