Skocz do pozycji: 1.

Tytuł:

The Relationship among Dissolved Inorganic Phosphate, Particulate Inorganic Phosphate, and Chlorophyll-a in Different Seasons in the Coastal Seas of Semarang and Jepara

Autorzy:

Maslukah, Lilik
Zainuri, Muhammad
Wirasatriya, Anindya
Maisyarah, Siti

Powiązania:

https://bibliotekanauki.pl/articles/125252.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

dissolved inorganic phosphate
particulate inorganic phosphate
Semarang
Jepara

Opis:

The speciation of particulate inorganic phosphate (PIP) in waters is still rarely studied, unlike the dissolved inorganic phosphate (DIP) which is often used in the assessment of the water quality parameters and their effect on the presence of chlorophyll a. This research aimed at determinig the relationship between DIP and PIP and its effect on the concentration of chlorophyll-a. This research was conducted in the waters of Semarang and Jepara, in different seasons (Rainy and dry). Speciation from PIP was obtained through an extraction process using 1 M HCL and continued with phosphate analysis using the molybdenum blue method, as in the DIP analysis. The linear model was used to find an equation and determine the variables that affect chlorophyll a. Our results showed that the distribution patterns of DIP, PIP and Chlorophyll-a have different patterns in the two study areas and different seasons. The concentration of DIP is always high in the Semarang waters, and is followed by a high chlorophyll-a response. A different pattern was found in the Jepara waters, where the chlorophyll-a response is high in the east monsoon. The relationship of Chl-a to DIP was very significant in the west season in the waters of Semarang and the Jepara region in the east season (p < 0.05). The relationship of chlorophyll a to DIP in the Semarang and Jepara waters produced an equation, Chl a = -56.565 + 76.672 (DIP) with a coefficient of determination R² = 0.478, at a significant level (p) = 0.004 and Chl a = -25.844 + 68.827 (DIP) with value of R² = 0.421 at a significance level of p = 0.007, respectively.

Źródło:

Journal of Ecological Engineering; 2020, 21, 3; 135-142
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:

Dynamics of Nitrogen Transformations in the Soil Fertilized with Digestate from Agricultural Biogas Plant

Autorzy:

Wysocka-Czubaszek, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/125017.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

digestate
inorganic nitrogen
nitrification

Opis:

The biogas production from dedicated crops creates an additional organic fertilizer which may, at least partially, substitute synthetic_-N fertilizers. The digestates are characterized by an elevated NH_4-N content; therefore, they may supply more readily-available N to the crops, compared to manures. Thus, the aim of the study was the analysis of N dynamics in the soil fertilized with the digestate from agricultural biogas plant fed mainly with maize silage with addition of poultry manure and potato pulp. A laboratory incubation experiment was conducted for 56 days and the soil was sampled from the field fertilized with the same digestate under the conditions of regular farming practices. In both the incubation experiment and the field study, the digestate supplied the soil in NH_4-N. The inorganic_-N transformation showed a similar overall pattern with some differences. In the incubation experiment, after the application of the digestate in the amount corresponding to the fertilizer dose of 170 kg N ha^-1, the NH_4-N content decreased rapidly during the first 14 days from 61.54±5.65 mg N kg^-1 to 19.02±4.12 mg N kg^-1 and then at the day 42 – to values close to zero. In contrast, the NO_3-N content increased from 6.35±0.35 mg N kg^-1 to 50.65±4.73 mg N kg^-1 at day 14 and further to 79.06±13.95 mg N kg^-1 at day 42. In the field, the elevation of the NH_4-N content after digestate application was less pronounced as a consequence of lower application rate (114 kg N ha^-1); however, the rapid drop in the ammonium-N content from 20.41±9.18 mg N kg^-1 at day 0 to 14.80±9.75 mg N kg^-1 at day 7 followed by a slow decrease until the day 56, was observed. The average soil NO_3-N content was rather constant in the first 7 days after fertilization and the rapid nitrification occurred in next 49 days resulting in the nitrate_-N increase to 32.97±24.46 mg N kg^-1. The overall pattern of N dynamics in the soil fertilized with digestate was the same in the incubation experiment and under the field condition, even though the studied soils showed some dissimilarities. Rapid ammonium_-N transformation to nitrate_-N may create favourable conditions for nitrate leaching; therefore, the farm management techniques should be focused on nutrient recycling and N loss prevention.

Źródło:

Journal of Ecological Engineering; 2019, 20, 1; 108-117
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Advances in hybridised and inorganic composite metal halide perovskites : a review

Autorzy:

Farfan, Hariana I.
Roa, Karol L.
Castro, Hugo F.

Powiązania:

https://bibliotekanauki.pl/articles/27315695.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

perovskites
halides
hybrid
inorganic
composites

Opis:

In recent years, metal halide perovskites have gained significant attention due to their unique optical and electronic properties of semiconductor materials, which make them ideal for use in sustainable and energy-efficient devices. These devices include solar cells, lasers, and light-emitting diodes. Therefore, this review aims initially to provide an overview of the most important characteristics of metal halide perovskites, including their engineering development in various types, such as those based on lead or lead-free materials, like tin or germanium. Additionally, perovskites made from purely inorganic compounds like caesium bromide, chloride, or iodide, as well as hybrids mixed with organic compounds like formamidinium and methylammonium halides will be discussed. The goal is to improve their stability and efficiency. Secondly, some of the studies have proposed technologies combining electronic and mechanical characteristics of flexibility or rigidity as required, promoting their synthesis with different materials such as polymers (poly methyl methacrylate, polyvinylidene fluoride), biopolymers (starch, cyclodextrin, polylactic acid, and polylysines), among others. Finally, the subject of this work is to establish the main purpose of the research carried out so far, which is to develop simpler and more scalable processes at industrial level to achieve greater efficiency and duration in storage, exposure to visible light, critical environments, humid or high temperatures.

Źródło:

Opto-Electronics Review; 2023, 31, 4; art. no. e148221
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Na-montmorillonite modified with ammonium salts and azobenzene as a photoactive nanomaterial

Autorzy:

Koteja, A.
Matusik, J.

Powiązania:

https://bibliotekanauki.pl/articles/184535.pdf

Data publikacji:

2016

Wydawca:

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

Tematy:

inorganic solid structures
organic molecules
minerals

Opis:

Modification of inorganic solid structures (e.g. minerals) with organic molecules is a constantly developed topic in material sciences. The organic functionalization leads to the production of new materials with integrated properties of both the organic and inorganic component. In the presented study we have modified a Na-montmorillonite with alkylammonium surfactants and subsequently azobenzene, in order to obtain a nanomaterial that shows response to UV radiation. Azobenzene is a photoswitchable organic molecule capable to change its conformation upon UV radiation from the trans- to cis-azobenzene isomer. This reaction is coupled with a change of the molecules shape and dimensions (Klajn 2010). The montmorillonite is a layered aluminosilicate that serves as an excellent host structure for organic guest species. Due to the net negative layer charge it shows the ability to swell and to exchange the originally present interlayer cations. These properties allow the intercalation of bulk organic molecules and to control their arrangement. Much attention has been paid to the possibility of transferring the photoswitching ability of organic molecule into the motion of the whole organo-mineral structure (Heinz et al. 2008). Such nanoswitch is particularly appealing as it is controlled with radiation – remotely and at a precise location. The efficiency of a synthesized nanoswitch depends on an accurate selection of the host and guest component. The target of this study to test a series of organic surfactants and to establish a modification pathway that leads to obtaining a material most promising in the view of its photoresponsive behavior. The montmorillonite modification was performed in a two-step procedure, as the direct intercalation of a nonionic azobenzene is not possible. First, the Na-montmorillonite (denoted SWy) was ion-exchanged with trimethylalkylammonium cations abbreviated C n and benzyldimethylalkylammonium cations – BC n , where n refers to the number of carbon atoms in the alkyl chain and is equal to 12, 14 or 16. In the second step the organo-montmorillonites were reacted with azobenzene (AzBz) for 24 h at 120°C in a hermetically closed teflon vessel. The yellowish products were characterized with the X-Ray diffraction (XRD), the infrared spectroscopy (FTIR) and CHN elemental analysis. In all cases the intercalation of the ammonium cation caused an increase of the montmorillonites basal spacing ( d 001 ). The d 001 values were equal to 16.4 Å, 18.2 Å and 20.5 Å for SWy-C 12 , SWy-C 14 and SWy-C 16 , respectively. The samples modified with the BC n cations showed ~1.5 Å larger basal spacing, due to the presence of the benzyl group in the intercalated molecule. A linear relationship was observed between the d 001 value and the alkyl chain length of the introduced salts. This suggests that the organic cations formed paraffin-type aggregates in the interlayer (Ogawa et al. 1999) where the molecules are inclined to the layer surface. The FTIR spectra of modified SWy sample showed intense bands corresponding to CH 2 vibration modes. Along with the increasing alkyl chain length the CH 2 stretching bands shifted towards lower energies. This is an effect of growing packing density of alkylammonium molecules in the interlayer (He et al. 2004) and it is coupled with straightening of the alkyl chains due to transformation of disordered gauche conformer to the ordered all-trans conformer (Vaia et al. 1994). It can be concluded that the longer alkyl chains (C 16 and BC 16 ) form more ordered, solid-like aggregates in the interlayer space. The molar content of organic molecules was calculated basing on the CHN elemental analysis. The amount of intercalated alkylammonium cations was nearly equal to the cation exchange capacity (CEC) of montmorillonite – 88.9 meq/100 g. The reaction with azobenzene was most effective for montmorillonite modified with the alkylammonium cations having the longest chains as confirmed by the XRD patterns. The d 001 values of SWy-C 16 and SWy-BC 16 samples after reaction with AzBz increased to 36.9 Å and 35.9 Å, respecively. Well resolved and intense (001) peaks as well as the presence of the 2 nd and 3 rd order reflections indicated a highly ordered structure of these intercalates. On the contrary, diffraction peaks were less resolved and broadened for samples prepared with the shorter C 12 , C 14 , BC 12 and BC 14 molecules after reaction with AzBz. Based on these results, it is assumed that the long chain alkylammonium ions are more effective surfactants for the further intercalation of azobenzene into the montmorillonites interlayer space. The obtained highly ordered structures are promising materials for application as photo-actuated nanoswitches.

Źródło:

Geology, Geophysics and Environment; 2016, 42, 1; 87-88
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

An adsorption of bovine serum albumin on carbon/zirconium oxide microfiltration membranes at different pH’s as determined from breakthrough curves

Autorzy:

Białopiotrowicz, T.
Blanpain, P.
René, F.
Lalande, M.

Powiązania:

https://bibliotekanauki.pl/articles/346995.pdf

Data publikacji:

2002

Wydawca:

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej

Tematy:

BSA adsorption
inorganic membranes
breakthrough curve

Opis:

Adsorption of bovine serum albumin (BSA) at different pHs on carbon supported microfiltration (MF) inorganic membranes was measured by using breakthrough (BT) curves derived from liquid frontal chromatography. Adsorption was quantified in the presence of permeation through the membrane thickness at a constant flow rate. Using the method described, it was confirmed that BSA adsorption is dependent on pH and its maximum is near the BSA isoelectric point ( i.e. pH 4.9). Using Langmuir’s equation, monolayer capacities were determined. It was found that adsorption is of monomolecular type. Analysis of the methods ( called algorithms) used for adsorption calculation was carried out. Monolayer capacities found were generally lower than theoretical BSA monolayer capacity in side-on orientation. It was concluded that such effects as pore blocking, deposition of aggregates inside the membrane or slow formation of dimers were not the main mechanisms of BSA uptake by the MF membranes studied during BT curve formation.

Źródło:

Ars Separatoria Acta; 2002, 1; 111-137
1731-6340

Pojawia się w:

Ars Separatoria Acta

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Anatomy of contaminated aquifers of an industrial site : insights from the stable isotope compositions of waters and dissolved inorganic carbon

Autorzy:

Vennemann, T. W.
Angloher-Reichelt, S.

Powiązania:

https://bibliotekanauki.pl/articles/2058959.pdf

Data publikacji:

2005

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

isotope compositions
inorganic carbon
geological cross-section

Opis:

The hydrogen and oxygen isotopes of water and the carbon isotope composition of dissolved inorganic carbon (DIC) from different aquifers at an industrial site, highly contaminated by organic pollutants representing residues of the former gas production, have been used as natural tracers to characterize the hydrologic system. On the basis of their stable isotope compositions as well as the seasonal variations, different groups of waters (precipitation, surface waters, groundwaters and mineral waters) as well as seasonably variable processes of mixing between these waters can clearly be distinguished. In addition, reservoir effects and infiltration rates can be estimated. In the northern part of the site an influence of uprising mineral waters within the Quaternary aquifers, presumably along a fault zone, can be recognized. Marginal infiltration from the Neckar River in the east and surface water infiltration adjacent to a steep hill on the western edge of the site with an infiltration rate of about one month can also be resolved through the seasonal variation. Quaternary aquifers closer to the centre of the site show no seasonal variations, except for one bore hole close to a for mermill channel and an other bore hole adjacent to a rain water channel. Distinct carbon isotope compositions and concentrations of DIC for these different groups of waters reflect variable influence of different components of the natural carbon cycle: dissolution of marine carbonates in the mineral waters, biogenic, soil-derived CO2 in ground- and surface waters, as well as additional influence of atmospheric CO2 for the surface waters. Many Quaternary aquifer waters have, how ever, distinctly lower δ13CDIC values and higher DIC concentrations compared to those expected for natural waters. Given the location of contaminated groundwaters at this site but also in the industrially well-developed valley out side of this site, the most likely source for the low δ13CDIC values is a biodegradation of anthropogenic organic substances, in particular the taroils at the site.

Źródło:

Geological Quarterly; 2005, 49, 2; 113-126
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

The impact of reagents concentration on the efficiency of obtaining high-purity magnesium hydroxide

Autorzy:

Radomski, Piotr
Jarosiński, Andrzej
Wzorek, Zbigniew
Nowak, Anna K.

Powiązania:

https://bibliotekanauki.pl/articles/778842.pdf

Data publikacji:

2020

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

magnesium hydroxide
precipitation method
inorganic flame retardants

Opis:

The work presents the impact of reagents concentration and the drying process on the efficiency of obtaining magnesium hydroxide and its specific surface area. Magnesium sulphate(VI) within the concentration range of 0.7–2.0 mol/dm³  was used in the research as magnesium feedstock and sodium hydroxide was used as a precipitating agent within the same concentration range. The process of obtaining magnesium hydroxide was carried out with a 25% excess of the precipitating agent in relation to the reaction stoichiometry. The obtained suspension was separated by way of multi-stage sedimentation with the use of acetone and freezing samples. Depending on the concentration of reagents the efficiency of obtaining magnesium hydroxide fell within the range of 88–99%, whereas the specific surface area – within 115–609 m² /g, while the high purity of samples above 99% of magnesium hydroxide was maintained.

Źródło:

Polish Journal of Chemical Technology; 2020, 22, 2; 73-77
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:

Separation and Immobilization of Vanadium from Industrial Fly Ash as an Insoluble Inorganic Pigmen

Autorzy:

Kwolek, P.
Czubajewski, K.
Wojnicki, M.

Powiązania:

https://bibliotekanauki.pl/articles/351844.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

recovery
inorganic pigments
solubility
vanadium
bismuth
immobilisation

Opis:

It has been shown that the precipitation of bismuth orthovanadate from a fly ash leachate is a promising method of vanadium recovery. BiVO₄ obtained after appropriate heat treatment can be sold as a pigment. The yield of recovery of solubilised vanadium is equal to 68% and the precipitate is free from nickel impurity. The precipitate is insoluble in the solutions with pH ≥ 3. In more acidic media the solubility of precipitate increases with the decreasing pH. The solubility of the precipitate increases also with the increasing concentration of chloride ions.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 2; 901-909
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Adam Bielański (1912-2016)

Autorzy:

Witko, Małgorzata

Powiązania:

https://bibliotekanauki.pl/articles/703985.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Adam Bielański
chemistry
inorganic chemistry
catalysis
surface chemistry

Opis:

On September 4, died at the age of 100 Adam Bielański, Professor of Chemistry, an outstanding scientist, widely recognized authority in the field of inorganic chemistry, catalysis and surface chemistry.

Źródło:

Nauka; 2016, 4
1231-8515

Pojawia się w:

Nauka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Impact of Organic Manure and Inorganic Fertilizers on Seed Germination of Green Gram (Vigna radiata L.)

Autorzy:

Vaithiyanathan, T.
Sundaramoorthy, P.

Powiązania:

https://bibliotekanauki.pl/articles/1190122.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Agriculture
inorganic fertilizer
organic fertilizer
Vigna radiata L.

Opis:

India is one of the agricultural country and food is very important need for our country because growth of population. Nowadays various inorganic fertilizers used for agriculture for high yield purposes but it affect the soil fertility and living organisms. Chemical fertilizers are very costly and it produced environmental pollution. Organic compost is cost effective and sustainable. In this attempt the effect of various organic fertilizers (farm yard manure, vermicompost and composted coirpith) and inorganic fertilizers (nitrogen, phosphorus and potassium) on germination of green gram (Vigna radiata L.). The following parameters were analyzed such as germination percentage, seedling length, fresh weight, dry weight and photosynthetic pigments such as chlorophyll a, chlorophyll b, total chlorophyll and carotenoid. As the result of this study that all above the parameters were increased in vermicompost applicator soil of the plant compared to the other organic and inorganic fertilizers. This study concluded that vermicompost is very used for the crop production.

Źródło:

World Scientific News; 2016, 35; 111-122
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

Third Scientific and Technical Conference "Minerals Sorbents", Raw Materials, Power Engineering, Environmental Protection, Modern Technologies, 18–19 September 2017, Cracow

Autorzy:

Bajda, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/127576.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

organic substances
inorganic substances
modern science
industry
editorial

Opis:

We present an issue containing articles that were presented at the Third Scientific and Technical Conference "Minerals Sorbents", Raw Materials, Power Engineering, Environmental Protection, Modern Technologies, which took place on 18–19 September 2017 in Cracow. The conference was a great forum for exchanging experiences, presenting the latest research achievements of the country's leading scientific units to the representatives of the key industry sectors whose production technologies are based on the use of mineral sorbents.

Źródło:

Mineralogia; 2017, 48, 1/4; 1-2
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Variation of lignite ash in vertical and horizontal sections of mining walls in the Konin Lignite Mine, central Poland

Autorzy:

Chomiak, Lilianna

Powiązania:

https://bibliotekanauki.pl/articles/184783.pdf

Data publikacji:

2020

Wydawca:

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

Tematy:

Middle Miocene
backswamp area
inorganic matter
coefficient of variation

Opis:

This paper focuses on the variations of lignite ash along selected sections and mining walls from three lignite opencast mines in central Poland. They are owned by the Konin Lignite Mine, where the first Mid-Polish lignite seam is being mined to produce electricity. Ash content in lignite is important because ash lowers the calorific value of the lignite. The results obtained are based on 266 samples of lignite collected from the Drzewce, Tomisławice, and Jóźwin IIB opencasts. All samples were tested according to ISO 1171 standard procedures, that is, they were first burned at a temperature of 850°C, then the ash content was determined on a dry basis (Ad ), before the basic statistical parameters were calculated. The studied lignite seam is characterised by a variable distribution pattern of ash both along selected vertical sections and lignite walls, as well as between the three opencasts. The ash content of individual samples ranged from 6.5 to 69.8 wt%, while the average content in opencast mines varied from 9.7 to 17.6 wt%. The coefficient of variation is large (80.23–96.33%) in the case of the Drzewce and Tomisławice, and low to average (14.53–37.75%) in the case of Jóźwin IIB. Significant ash enrichment of some beds is interpreted in this article as a consequence of floods occurring in a Mid-Miocene mire (backswamp), but also of chemical precipitation. When lignite is burned to generate electricity, a relatively large amount of ash is produced. Therefore, recognition of ash content in lignite, in addition to the chemical composition and phase of ash, is recommended to better protect the environment. At the first stage of protection, it can be best achieved by analysing field samples for ash content.

Źródło:

Geology, Geophysics and Environment; 2020, 46, 1; 17-28
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Wykorzystanie ceramicznych membran ultrafiltracyjnych do usuwania substancji powierzchniowo czynnych z roztworów wodnych
Use of ceramic ultrafiltration membranes for the removal of surfactants from water solutions

Autorzy:

Kowalska, I.

Powiązania:

https://bibliotekanauki.pl/articles/237111.pdf

Data publikacji:

2011

Wydawca:

Polskie Zrzeszenie Inżynierów i Techników Sanitarnych

Tematy:

surfaktant
ciśnieniowy proces membranowy
membrana nieorganiczna
surfactant
inorganic membrane

Opis:

Zbadano właściwości transportowe i separacyjne rurowych membran ceramicznych wykonanych z dwutlenku tytanu i cyrkonu w stosunku do wodnych roztworów anionowej substancji powierzchniowo czynnej (dodecylobenzenosulfonian sodu - SDBS). Określono wpływ stężenia SDBS w roztworze zasilającym, a także granicznej rozdzielczości membran oraz warunków procesowych na wydajność procesu ultrafiltracji realizowanego w układzie przepływu krzyżowego (cross-flow). Wykazano, że układ separacyjny z membranami ceramicznymi zapewnił zadowalającą eliminację SDBS z roztworów wodnych. W zakresie analizowanych stężeń SDBS zaobserwowano rosnącą podatności membran na blokowanie wraz ze wzrostem ich granicznej rozdzielczości (cut-off). Stwierdzono też istotny wpływ warunków procesowych (ciśnienie transmembranowe, liniowa prędkość przepływu roztworu zasilającego przy powierzchni membrany) na właściwości transportowo-separacyjne membran. Wykazano, że ceramiczne membrany ultrafiltracyjne zapewniają stabilną pracę układu separacyjnego w warunkach długotrwałej filtracji.
Tubular ceramic membranes made of titanium and zirconium dioxides were tested for transport and separation properties with respect to the aqueous solutions of an anionic surface-active substance (sodium dodecylbenzenesulfonate, SDBS). Examined was the problem of how the concentration of SDBS in the feed solution, the molecular weight cut-off (MWCO) of the membranes, and the process conditions influence the efficiency of ultrafiltration performed in a cross-flow system. It has been demonstrated that the separation system involving ceramic membranes provides a sufficiently high SDBS removal from water solutions. Within the range of the SDBS concentrations examined, it has been observed that the membranes were susceptible to fouling, and that this susceptibility increased with the increase in the MWCO value. The effect of the process conditions (transmembrane pressure and cross-flow velocity of the feed solution at the membrane surface) on the transport and separation properties of the ceramic membranes was also found to be of significance. The study has revealed that ceramic ultrafiltration membranes provide a stable operation of the separation system under conditions of long-term filtration.

Źródło:

Ochrona Środowiska; 2011, 33, 1; 41-45
1230-6169

Pojawia się w:

Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Morphological Evaluation of Variously Intercalated Pre-baked Clay

Autorzy:

Ullah, H.
Imtiaz, A.

Powiązania:

https://bibliotekanauki.pl/articles/778613.pdf

Data publikacji:

2014

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

clay
alkali metal intercalation
inorganic modifier
scanning electron microscopy

Opis:

The use of porous materials is enjoying tremendous popularity and attention of the advance scientific communities due to their excellent adsorptive and catalytic activities. Clays are one of the most important candidates in the porous community which shows the above mentioned activities after modifing with a different intercalating agent. The paper is focused on the infiuence of some inorganic intercalating agents (NaOH) on the morphology of the variously intercalated clay samples. The alkali metal was used as the inorganic intercalating agent. The effect of intercalation temperature, intercalation agent concentration and intercalation time on the pre-baked clay morphology were also part of the study. Scanning electron microscopy (SEM) study was performed to evaluate the morphological changes of the resultant intercalates. Different morphological properties were improved significantly in the case of the inorganically modified clay samples. Thus, such intercalations are suggested to be effective if the clays under study are to be used for different industrial process at elevated conditions.

Źródło:

Polish Journal of Chemical Technology; 2014, 16, 2; 5-11
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Influence of bacterial activities on nitrogen uptake rates determined by the application of antibiotics

Autorzy:

Tungaraza, C.
Brion, N.
Rousseau, V.
Baeyens, W.
Goeyens, L.

Powiązania:

https://bibliotekanauki.pl/articles/48700.pdf

Data publikacji:

2003

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

bacterial activity
inorganic nutrient
antibiotic
bacteria
nitrogenous nutrient
phytoplankton

Opis:

The influence of bacterial activities on inorganic nutrients has always affected total phytoplankton uptake rates owing to the absence of a reliable method that can exclude these effects. The use of natural samples to determine the contribution of bacterial activities has been based on the size fractionation method which, unfortunately, is encumbered with uncertainties, especially because of the size overlap between bacteria and phytoplankton communities. In this paper, the results are reported of an estimation of bacterial activities by the use of inhibitors (antibiotics). It was shown that the contribution of bacterial activities to the uptake of nitrogenous nutrients was highest for ammonium (79%), followed by nitrate (72%) and urea (62%). In a second set of experiments the concentration of ammonium was raised by 5 μM. This was done to avoid nutrient limitation resulting from the absence of recycled nutrients following the addition of antibiotics and the maximum contribution of bacterial activity to the uptake rate of ammonium increased to 87%. It can be concluded that the use of inhibitors is a good method, a reliable alternative to the fractionation method. However, it is important to note that inhibitors can affect both phytoplankton growth and the nutrient recycling process. Our results indicate that the application of antibiotics had measurable effects not only on the target bacteria but also on the uptake behaviour of phytoplankton. Our observations were therefore limited to the period when there was no effect on the phytoplankton, as was demonstrated by a carbon protein incorporation experiment.

Źródło:

Oceanologia; 2003, 45, 3
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Reduction of organic and inorganic pollutant from waste water by algae

Autorzy:

Sahu, O.

Powiązania:

https://bibliotekanauki.pl/articles/11244.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

pollutant
reduction
organic pollutant
inorganic pollutant
waste water
alga

Opis:

Recently, algae have become significant organisms for biological purification of wastewater since they are able to accumulate plant nutrients, heavy metals, pesticides, organic and inorganic toxic substances and radioactive matters in their cells/bodies. Biological wastewater treatment systems with micro algae have particularly gained importance in last 50 years and it is now widely accepted that algal wastewater treatment systems are as effective as conventional treatment systems. These specific features have made algal wastewaters treatment systems an significant low-cost alternatives to complex expensive treatment systems particularly for purification of municipal wastewaters. By this method 70 % of biological oxygen demand, 66 % of chemical oxygen demand, 71 % total nitrogen, 67 % of phosphorus, 54 % volatile solid and 51 % of dissolved solid was reduced.

Źródło:

International Letters of Natural Sciences; 2014, 08, 1
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Leaching kinetics of atrazine and inorganic chemicals in tilled and orchard soils

Autorzy:

Szajdak, L.W.
Lipiec, J.
Siczek, A.
Nosalewicz, A.
Majewska, U.

Powiązania:

https://bibliotekanauki.pl/articles/25267.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

leaching
kinetics
atrazine
inorganic chemical
tilled soil
orchard soil

Opis:

The aim of this study was to verify first-order kinetic reaction rate model performance in predicting of leaching of atrazine and inorganic compounds (K+1, Fe+3, Mg+2, Mn+2, NH4 +, NO3 - and PO4 -3) from tilled and orchard silty loam soils. This model provided an excellent fit to the experimental concentration changes of the compounds vs. time data during leaching. Calculated values of the first-order reaction rate constants for the changes of all chemicals were from 3.8 to 19.0 times higher in orchard than in tilled soil. Higher first-order reaction constants for orchard than tilled soil correspond with both higher total porosity and contribution of biological pores in the former. The first order reaction constants for the leaching of chemical compounds enables prediction of the actual compound concentration and the interactions between compound and soil as affected by management system. The study demonstrates the effectiveness of simultaneous chemical and physical analyses as a tool for the understanding of leaching in variously managed soils.

Źródło:

International Agrophysics; 2014, 28, 2
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Dewatering of barite clay wastewater by inorganic coagulants and co-polymer flocculants

Autorzy:

Deniz, V.

Powiązania:

https://bibliotekanauki.pl/articles/109684.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

dewatering
sedimentation
inorganic coagulant
co-polymer flocculants
wastewater
barite

Opis:

This work is focused on dewatering of barite-containing clay waste from a barite beneficiation plant by coagulation and flocculation to enhance the dewatering rate and recycling of process water. A flocculation performance of co-polymers (Superfloc A-130 and A-100) was compared with coagulants (Al2SO418H2O, CaCl2 and FeCl36H2O). The best results were obtained with an anionic co-polymer, i.e. Superfloc A-130. The settling rate increased 635-fold in the case of using anionic co-polymer Superfloc A-130 in comparison with the natural settling rate of the same wastewater. In laboratory tests, an optimum thickener design was developed for the barite clay wastewater. In this paper, sedimentation studies on the barite clay wastes are presented for the first time, both as the laboratory studies and industrial applications.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 1; 351-364
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Efficiency of Integrated Nutrient Management to Improve Eggplant Production in Intercropping Systems

Autorzy:

Maghfoer, Moch. Dawam
Lehar, Laurensius
Lestari, Mahayu Woro

Powiązania:

https://bibliotekanauki.pl/articles/2202188.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

inorganic N
integrated nutrient management
intercropping system
manure
microbes

Opis:

Eggplant is a vegetable that is widely cultivated in Indonesia. Fertilization is one of the most influential factors to increase eggplant productivity. The research to improve the eggplant productivity through the application of various nitrogen nutrient sources in an integrated nutrient management system and an intercropping system with cabbage was carried out from June to December 2019 in Wonorejo, Poncokusumo-Malang. The study was conducted using a randomized block design (RBD) with 21 treatments and was repeated 3 times. The treatments were D0 = Control (180 kg N) and (D1–D20), which were various combinations of inorganic N fertilizers, manure, and microbes (EM and PGPR). Observations included the number of leaves and stem diameter of eggplant, number of cabbage leaves, number of fruit per plant, fruit weight (per plant, per hectare, and per fruit), and Land Equivalent Ratio (LER), soil analysis before and after the research. The results showed that the combination of 75% inorganic fertilizer + 20–30 t·ha-1 manure + 10–20 ml·l-1 microbe (EM / PGPR) in the eggplant – cabbage intercropping system increased the growth and yield of eggplant, with fruit weights ranging 1.86–2.35 kg·plant-1 or 40.88–53.17 t·ha-1, and LER value was 1.94–2.04.

Źródło:

Journal of Ecological Engineering; 2022, 23, 11; 217--227
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Response of Soil Phosphatases to Three Different Ionic Liquids With Hexafluorophosphate Anion

Autorzy:

Telesiński, A.
Śnioszek, M.
Biczak, R.
Pawłowska, B.

Powiązania:

https://bibliotekanauki.pl/articles/123035.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

ionic liquids
soil
phosphomonoesterases
phosphotriesterase
inorganic pyrophosphatase
resistance index

Opis:

The aim of this study was to determine the effect of three different ionic liquids (ILs): 1-butyl-1-methylpyrrolidynium hexafluorophosphate [Pyrrol][PF6], 1-butyl-1-methylpiperydynium hexafluorophosphate [Piper][PF6] and 1-butyl-4-methylopirydynium hexafluorophosphate [Piryd][PF6] on phosphatase activities in soil. The pot experiment was carried out on loamy sand (Corg content 9.0 g/kg) with spring barley as a tested plant. The ILs was used at the dosages of 0, 1, 10, 50, 100, 400, 700 and 1000 mg/kg dry matter (DM). On day 14, soil samples were collected and activities of alkaline phosphomonoesterase, acid phosphomonoesterase, phosphotriesterase and inorganic pyrophosphatase were determined. Based on the analysis of the effect measure η2 by variance analysis – ANOVA – the percentage shares of all variable factors affecting the activity of phosphatases were also defined. Obtained results showed that the application of different dosages of all ILs caused mainly non-significant changes in phosphatase activity. Changes in activity of phosphatases were often not dependent on IL dosages. The most sensitive for ILs were both phosphomonoesterases. The type of ILs had the highest percentage participation in formation of acid phosphomonoesterase activity, while dosages of ILs affected mainly alkaline phosphomonoesterase and phosphotriesterase activities.

Źródło:

Journal of Ecological Engineering; 2017, 18, 2; 86-91
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Decoring Behaviour of Chosen Moulding Materials with Alkali Silicate Based Inorganic Binders

Autorzy:

Conev, M.
Vasková, I.
Hrubovčáková, M.
Hajdúch, P.

Powiązania:

https://bibliotekanauki.pl/articles/356323.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

inorganic binder
alkali silicates
moulding material
knock-out properties

Opis:

This paper contains basic information about new processes for cores for cylinder heads production with alkali silicate based inorganic binders. Inorganic binders are coming back to the foreground due to their ecologically friendly nature and new technologies for cores production and new binder systems were developed. Basically these binder systems are modified alkali silicates and therefore they carry some well-known unfavourable properties with their usage. To compensate these disadvantages, the binder systems are working with additives which are most often in powder form and are added in the moulding material. This paper deals with decoring behaviour of different moulding sands as well as the influence of chosen additives on knock-out properties in laboratory terms. For this purpose, specific methods of specimen production are described. Developed methods are then used to compare decoring behaviour of chosen sands and binder systems.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 2A; 703-706
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Regenerowalność mas formierskich z nowymi spoiwami nieorganicznymi przeznaczonymi dla odlewów z metali nieżelaznych
Reclamability of moulding sands with new inorganic binders for non-ferrous castings

Autorzy:

Izdebska-Szanda, I.
Angrecki, M.
Palma, A.

Powiązania:

https://bibliotekanauki.pl/articles/391528.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa

Tematy:

modyfikowane spoiwa nieorganiczne
regeneracja
regenerowalność
modified inorganic binders
reclamation
reclamability

Opis:

W artykule przedstawiono wyniki badań, stanowiących wycinek prac prowadzonych w ramach projektu POIG.01.01.02-00-015/09 „Zaawansowane materiały i technologie”, którego jednym z celów jest wprowadzenie do wykonywania odlewów z metali nieżelaznych, nowych, ekologicznych spoiw nieorganicznych. Zastosowanie modyfikowanych chemicznie spoiw nieorganicznych ma na celu poprawę wybijalności i związanej z tym regenerowalności mas formierskich z udziałem stosowanego dotychczas w odlewnictwie spoiwa nieorganicznego (szkła wodnego), a tym samym umożliwienie stosowania spoiw ekologicznych do odlewania stopów metali nieżelaznych. Regeneracja mas formiersko-rdzeniowych jest podstawowym i efektywnym sposobem zagospodarowania odpadów na miejscu w odlewni, zgodnie z wytycznymi ochrony środowiska. Dlatego przeprowadzone zostały badania regeneracji zużytych mas formiersko-rdzeniowych z nowymi gatunkami spoiw nieorganicznych opracowanych w ramach projektu. Wyniki tych badań zaprezentowano w artykule. Badania te pozwoliły na określenie stopnia odzysku materiału użytecznego, jakim jest piasek zregenerowany, jak i stopnia jego wykorzystania w procesie produkcyjnym. W artykule przedstawiono również wyniki badań regeneracji wielokrotnej, stanowiące kontynuację wcześnie prowadzonych badań wstępnych. Opisane w artykule badania obejmują również walidację wyników w warunkach przemysłowych.
The article presents results of an investigation which constitutes a section of research under the project POIG.01.01.02-00-015/09 “Advanced materials and technologies”, one of the aims which is the introduction of new ecological inorganic binders into making casts from non-ferrous metals. The application of chemically modified inorganic binders aims at improving knock-out properties and related to it reclamability of moulding sands with the participation of, previously used in foundry practice, inorganic binder (water glass), and at the same time allowing the application of ecological binders for casting non-ferrous metal alloys. Reclamation of moulding and core sands is a fundamental and effective way to manage waste on site at the foundry in accordance with the environmental guidelines. Therefore, studies of reclamation of waste moulding and core sands with new types of inorganic binders, developed within the framework of the project, were carried out. The article presents these results of the investigation. These studies allowed determining the degree of recovery of useful material, that is the reclaimed sand, and the degree of its utilisation in the production process. The article also presents the investigation results of multiple reclamation, which is the continuation of a previously conducted initial investigation. The investigation described in the present article also includes the validation of results under industrial conditions.

Źródło:

Prace Instytutu Odlewnictwa; 2013, 53, 4; 3-16
1899-2439

Pojawia się w:

Prace Instytutu Odlewnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Total and inorganic arsenic in fish, seafood and seaweeds - exposure assessment

Autorzy:

Mania, M.
Rebeniak, M.
Szynal, T.
Wojciechowska-Mazurek, M.
Starska, K.
Ledzion, E.
Postupolski, J.

Powiązania:

https://bibliotekanauki.pl/articles/874965.pdf

Data publikacji:

2015

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

total arsenic
inorganic arsenic
fish
seaweed
exposure assessment
marine food

Opis:

Background. According to the European Food Safety Authority (EFSA), fish, seafood and seaweeds are foodstuffs that significantly contribute to dietary arsenic intake. With the exception of some algal species, the dominant compounds of arsenic in such food products are the less toxic organic forms. Both the Joint FAO/ WHO Expert Committee on Food Additives (JECFA) and EFSA recommend that speciation studies be performed to determine the different chemical forms in which arsenic is present in food due to the differences in their toxicity. Knowing such compositions can thus enable a complete exposure assessment to be made. Objectives. Determination of total and inorganic arsenic contents in fish, their products, seafood and seaweeds present on the Polish market. This was then followed by an exposure assessment of consumers to inorganic arsenic in these foodstuffs. Materials and Methods. Total and inorganic arsenic was determined in 55 samples of fish, their products, seafood as well as seaweeds available on the market. The analytical method was hydride generation atomic absorption spectrometry (HGAAS), after dry ashing of samples and reduction of arsenic to arsenic hydride using sodium borohydride. In order to isolate only the inorganic forms of arsenic prior to mineralisation, samples were subjected to concentrated HCl hydrolysis, followed by reduction with hydrobromic acid and hydrazine sulphate after which triple chloroform extractions and triple 1M HCl re-extractions were performed. Exposure of adults was estimated in relation to the Benchmark Dose Lower Confidence Limit (BMDL05) as set by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) that resulted in a 0.5% increase in lung cancer (3.0 μg/kg body weight (b.w.) per day). Results. Mean total arsenic content from all investigated fish samples was 0.46 mg/kg (90th percentile 0.94 mg/kg), whilst the inorganic arsenic content never exceeded the detection limit of the analytical method used (0.025 mg/kg). In fish products, mean total arsenic concentration was 1.48 mg/kg (90th percentile: 2.42 mg/kg), whilst in seafood they were 0.87 mg/ kg (90th percentile: 2.23 mg/kg), for inorganic arsenic contamination at the 90th percentile was 0.043 mg/kg with most results however being less than 0.025 mg/kg. The highest inorganic arsenic levels were determined in the Hijiki algal species samples (102.7 mg/kg), whereas the other algal samples gave a mean inorganic concentration of 0.41 mg/kg (90th percentile 0.86 mg/kg). The estimated average adults exposure to inorganic arsenic in fish, seafood and seaweeds was less than 0.5% of the lowest BMDL0.5 dose. Only for the Hijiki seaweed it was at 4.9% BMDL0.5. Conclusions. Results demonstrate that dietary arsenic intake from fish, seafood and seaweed along with all their products do not constitute a significant health threat to consumers apart from the seaweed species Hizikia fusiformis in which over 40% of all the inorganic arsenic compounds were found.
Wprowadzenie. Ryby, owoce morza i wodorosty morskie należą do grupy środków spożywczych, które według Europejskiego Urzędu ds. Bezpieczeństwa Żywności (EFSA) mogą wnosić istotny udział do pobrania arsenu z dietą. W tej grupie produktów za wyjątkiem niektórych gatunków glonów, dominującymi formami arsenu są mniej toksyczne organiczne połączenia. Zarówno Połączony Komitet Ekspertów FAO/WHO ds. Substancji Dodatkowych do Żywności (JECFA) jak i EFSA wskazują na celowość prowadzenia badań specjacyjnych pozwalających określić różne formy chemiczne, w jakich arsen występuje w żywności, mając na uwadze duże różnice w ich toksyczności. Poznanie informacji o zawartości poszczególnych związków pozwala na dokonanie pełnej oceny narażenia. Cel badań. Oznaczenie zawartości arsenu całkowitego i nieorganicznego w rybach i ich produktach, owocach morza i wodorostach morskich dostępnych w obrocie handlowym w Polsce oraz ocena narażenia konsumentów na pobranie arsenu nieorganicznego z tymi grupami środków spożywczych. Materiał i metody. Analizie na zawartość arsenu całkowitego i nieorganicznego poddano 55 próbek ryb, ich produktów, owoców morza oraz glonów pochodzących z obrotu handlowego. Zawartości arsenu całkowitego i nieorganicznego oznaczono po suchej mineralizacji próbek metodą absorpcyjnej spektrometrii atomowej z wykorzystaniem generacji wodorków (HGAAS), po uprzedniej redukcji arsenu do arsenowodoru za pomocą borowodorku sodu. W celu wydzielenia nieorganicznych form arsenu próbki przed mineralizacją poddano hydrolizie w środowisku stężonego HCl, a następnie redukcji w obecności kwasu bromowodorowego i siarczanu hydrazyny oraz 3-krotnej ekstrakcji chloroformem i reekstrakcji 1M HCl. Oszacowane narażenie w odniesieniu do osób dorosłych porównano z wartością najniższej dawki wyznaczającej (Benchmark Dose Lower Confidence Limit) BMDL0,5 ustalonej przez The Joint FAO/WHO Expert Committee on Food Additives (JECFA) powodującej 0,5%-owy wzrost zachorowań na raka płuc (3,0 μg/kg m.c./dzień). Wyniki. Średnia zawartość arsenu całkowitego w badanych próbkach ryb wyniosła 0,46 mg/kg (90-ty percentyl: 0,94 mg/kg), natomiast arsenu nieorganicznego nie przekraczała granicy wykrywalności stosowanej metody 0,025 mg/kg. W przypadku przetworów rybnych średnie zanieczyszczenie arsenem wyniosło 1,48 mg/kg (90-ty percentyl: 2,42 mg/kg) natomiast owoców morza odpowiednio: 0,87 mg/kg (90-ty percentyl: 2,23 mg/kg), dla arsenu nieorganicznego 90-ty percentyl 0,043 mg/kg przy większości wyników poniżej 0,025 mg/kg. Najwyższym zanieczyszczeniem arsenem nieorganicznym charakteryzowały się glony z gatunku Hijiki (najwyższa zawartość 102,7 mg/kg), w pozostałych próbkach glonów średnia zawartość arsenu nieorganicznego wynosiła 0,41 mg/kg (90-ty percentyl: 0,86 mg/kg). Oszacowane średnie narażenie na arsen nieorganiczny w odniesieniu do osób dorosłych wyniosło dla ryb, owoców morza i wodorostów poniżej 0,5% wartości najniższej dawki wyznaczającej BMDL0,5. Jedynie w przypadku gatunku Hijiki było ono rzędu 4,9 % BMDL0,5. Wnioski. Na podstawie uzyskanych wyników stwierdzono, że pobranie arsenu w wyniku spożycia ryb, ich produktów, owoców morza, oraz wodorostów morskich nie stanowi istotnego zagrożenia dla zdrowia konsumentów poza gatunkiem Hizikia fusiformis zawierającym ponad 40% połączeń nieorganicznych arsenu.

Źródło:

Roczniki Państwowego Zakładu Higieny; 2015, 66, 3
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:

The oily wastewater treatment using the nanofiltration process

Autorzy:

Orecki, A.
Tomaszewska, M.

Powiązania:

https://bibliotekanauki.pl/articles/778647.pdf

Data publikacji:

2007

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

nanofiltracja
odolejanie ścieków
związki nieorganiczne
nanofiltration
oily wastewater
inorganic compounds

Opis:

The objective of this work was to investigate the possibility of oily wastewater treatment using the nanofiltration (NF) process. The NF studies were carried out with a permeate obtained from ultrafiltration (UF) (used for the treatment of the oily wastewater from metal industry). The influence of transmembrane pressure on a permeate flux, the degree of the rejection of oil and inorganic compounds was investigated. The studies on the NF treatment of oily wastewater demonstrated a high effectiveness of the rejection of oil and inorganic compounds. The permeate obtained from the treatment was free of oil. Moreover, the retention coefficient of the inorganic compounds was higher than 75% for all the cations examined (Na+, K+, Mg2+, Ca2+, Zn2+, Cu2+) and higher than 95% for sulphates. Therefore, the permeate obtained in the NF process can be reused for fresh emulsion preparation.

Źródło:

Polish Journal of Chemical Technology; 2007, 9, 4; 40-42
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Wyrafinowane spektroskopowe metody instrumentalne w badaniach związków nieorganicznych
Sophisticated instrumental spectroscopy methods in studies of inorganic compounds

Autorzy:

Jurowski, K.
Jurowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/134871.pdf

Data publikacji:

2015

Wydawca:

ADVSEO

Tematy:

spektroskopia
związki nieorganiczne
metody instrumentalne
instrumental methods
inorganic compounds
spectroscopy

Opis:

The instrumental spectroscopic methods are very important in nowadays scientific studies. The most of instrumental methods (e.g. IR, NMR, EPR, UV-Vis, mass spectrometry) are well grounded and used in the laboratory practice. In the article the methods of instrumental spectroscopy which are very significant in the studies of inorganic compounds were selected and described. The authors paid particular attention to the unpopular methods, such as: Resonance Raman spectroscopy, Mössbauer spectroscopy, Nuclear Quadrupole Resonance and photoelectron spectroscopy. They described spectroscopic base of these methods as well as the application based on the analysis of the particular examples of inorganic compounds. This article is an interdisciplinary review. It is the first work in literature that emphasizes many different and complex aspects of sophisticated spectroscopy methods in the modern inorganic analysis.

Źródło:

Technical Issues; 2015, 4; 11-18
2392-3954

Pojawia się w:

Technical Issues

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Points to ponder in the study of cadmium iodide

Autorzy:

Kaur, H.

Powiązania:

https://bibliotekanauki.pl/articles/411728.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

cadmium iodide
lead iodide
polytypism
phase transformations
Inorganic crystal structure

Opis:

During the growth of cadmium iodide crystals from solution, it has been observed that sometimes the crystal suddenly rotates. Probably, the convection currents are providing the force for the rotation. Mathematically, this force can be estimated and it must be greater than the van-der Walls force acting between adjacent sandwiches of cadmium iodide and can give rise to polytypic phase transformations. Further, studies of vacancies and the density measurements of various polytypes can help in understanding the phenomenon of polytypism better.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 8; 1-5
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Geochemical and faunal proxies in the Westphalian A (Langsettian) marine horizon of the Lublin Coal Basin

Autorzy:

Krzeszowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/2060565.pdf

Data publikacji:

2017

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

inorganic geochemistry
palaeo-redox conditions
Dunbarella horizon
Lublin Coal Basin

Opis:

The uppermost Westphalian marine horizon (Dunbarella horizon) is especially important for correlation of Carboniferous deposits in the Lublin Coal Basin and in other basins of the Northwest European Carboniferous Basin. The Dunbarella horizon is characterized by cyclic sedimentation and consequent faunal spectrum variability, typical for Westphalian marine horizons of northwestern Europe. Palaeontological study of the Dunbarella horizon showed the presence of macrofauna representing different palaeoenvironments, from marine to brackish (non-marine) and freshwater conditions. The vertical sea level fluctuations and changes in seawater salinity resulting in palaeontological record changes do not link with geochemical proxies. TOC, redox-sensitive trace element concentrations, and V/Cr, Ni/Co and V/(V + Ni) ratios generally suggest that the Dunbarella horizon sediments were deposited under predominantly oxic conditions (with local exceptions during the initial phase of the Dunbarella ingression; Kopina 1 borehole).

Źródło:

Geological Quarterly; 2017, 61, 4; 751--764
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Migration channels produced by laser ablation for substrate endothelialization

Autorzy:

Major, R.
Maksymow, K.
Marczak, J.
Lackner, J.
Kot, M.
Major, B.

Powiązania:

https://bibliotekanauki.pl/articles/201285.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

inorganic coatings
pulsed laser ablation
tissue scaffold
endothelial cells migration

Opis:

Seeding of cells on functional, biocompatible scaffolds is a crucial step in achievement the desired engineered tissue. In the present study, a pulsed laser modification onto inorganic substrate was made to promote endothelium cells migration and spread. Presented scaffolds were fabricated on carbon and titanium based coatings. Fabricated films provided very good mechanical properties together with a chemical stability preservation. The substrate modification consisted of grid-like template fabrication of micrometer size meshes. The microstructure analysis of laser traces revealed the grain size increase in the zone of laser beam interaction, which exerts an influence on a surface topography. Endothelium cells locomotion was observed within 10 day time period. As a result it was shown that the modified area enhanced cells adhesion with a preferred static behavior. The performed research work improved our understanding on the pulsed laser ablation process and template size influence on cells spatial arrangement. It constituted an important step towards fabrication of inorganic, biocompatible scaffolds for successful substrate endothelialization.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 337-342
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Evaluation of the use of regenerated activated carbons for the adsorption of phenol from a river

Autorzy:

Marszałek, Anna
Puszczało, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/28411657.pdf

Data publikacji:

2023

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

adsorbent regeneration
organic contaminants
inorganic contaminants
phenol removal
surface water

Opis:

The aim of the study was to use regenerated activated carbon to adsorb phenol from a river. Coconut shell activated carbon was derived from used tap water filter cartridges. The activated carbon was carbonised and then activated with KOH at 200°C, under a nitrogen atmosphere. The resulting adsorbent was characterised on the basis of nitrogen adsorption by Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM) analysis and point of zero charge (pH PZC). The study of periodic adsorption included kinetic and equilibrium modelling, determined the effect of solution pH on efficiency and the possibility of regeneration and reuse of the adsorbent. The efficiency of phenol removal from model water was evaluated, followed by the possibility of their adsorption from a polluted river in Silesia Province. Phenol adsorption followed pseudo-second-order kinetics. The adsorbents showed high adsorption abilities, as determined by the Langmuir isotherm model. The model fits the experimental data well. The concentration of phenol in the river was in the range of 0.45-0.77 mg∙dm-3, which means that its value was at least five times higher than the standard values. The use of regenerated activated carbon from waste filter cartridges removed phenol from the river by 78% using optimal test parameters.

Źródło:

Journal of Water and Land Development; 2023, 59; 93--99
1429-7426
2083-4535

Pojawia się w:

Journal of Water and Land Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Speciation analysis of inorganic forms of selenium in confectionery products
Analiza specjacyjna nieorganicznych form selenu w wyrobach cukierniczych

Autorzy:

Gawloska-Kamocka, A

Powiązania:

https://bibliotekanauki.pl/articles/15953.pdf

Data publikacji:

2007

Wydawca:

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

Tematy:

microelement
confectionery product
food analysis
food
selenium
inorganic form
speciation analysis

Opis:

Owing to its biological properties the microelement selenium has attracted enormous interest. It has been established that selenium stimulates the human immune system and has anti-carcinogenic effect. The main sources of selenium are high-protein foodstuffs of plant and animal origin, as well as high-protein dairy products. The aim of this study was to detect selenium content in confectionery products using speciation analysis in order to determine inorganic forms of selenium such as Se2- SeO32- and SeO42- anions. The hydride generation method combined with the atomic absorption spectroscopy was used for the final determination of selenium forms. The determination of selenium was conducted using aqueous extraction and digestion of samples with concentrated acids. The speciation determination of selenium was conducted in ten confectionery products. The correlation between the total content of selenium and its individual forms (-II), (IV),(VI) of different oxidation degree was also examined. It was shown that there was no correlation between the total selenium and inorganic forms of selenium. That means that speciation analysis is the only correct analysis of selenium content in foods.
Jednym z mikroelementów, który w ostatnich latach wzbudza ogromne zainteresowanie ze względu na swoje biologiczne właściwości, jest selen. Stwierdzono, że w organizmie człowieka selen stymuluje układ immunologiczny oraz działa przeciwnowotworowo. Głównym źródłem selenu jest żywność bogata w białko pochodzenia zwierzęcego i roślinnego oraz wysokobiałkowe produkty mleczne. Celem pracy było poznanie specjacji selenu w próbkach wyrobów cukierniczych zmierzającej do określenia nieorganicznych form selenu w postaci anionów: selenkowych Se2-, selenianowych (IV)SeO32-, selenianowych (VI) SeO42-. Do oznaczeń końcowych zastosowano technikę generowania wodorków w połączeniu z metodą atomowej spektroskopii absorpcyjnej HG-AAS. Oznaczenie selenu opiera się na połączeniu ekstrakcji wodnej próbki z roztwarzaniem próbki stężonymi kwasami. Oznaczenie specjacyjne selenu wykonano w 10 próbkach wyrobów cukierniczych. Zbadano również korelację między zawartością selenu a poszczególnymi formami selenu na (-II), (IV),(VI) stopniu utlenienia. Wykazano brak korelacji między zawartością całkowitą selenu a nieorganicznymi formami selenu. Oznacza to, że analiza specjacyjna jest jedyną analizą zawartości selenu w żywności.

Źródło:

Journal of Elementology; 2007, 12, 2
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Provenance and diagenesis of siliciclastic and organic material in the Albian-Turonian sediments (Silesian Nappe, Lanckorona, Outer Carpathians, Poland): preliminary studies

Autorzy:

Wójcik-Tabol, P.
Ślączka, A.

Powiązania:

https://bibliotekanauki.pl/articles/191891.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Geologiczne

Tematy:

organic and inorganic geochemistry
Albian-Turonian
Silesian Nappe
Outer Carpathians
Polska

Opis:

The provenance and diagenesis of the siliciclastic and hemipelagic sediments of three lithostratigraphic units: Lhoty Formation, Barnasiówka Radiolarian Shale Formation (BRSF) and Variegated Shales from Lancko- rona area, Polish Outer Carpathians, was approached by means of petrological and geochemical analysis of the representative samples. Data show that studied succession was mainly derived from two sources: 1. a dominant terrigenous fine-grained components have affinity with average upper continental crust (basing on mineral detritus, K2O/Rb ratio and Y/Ni vs. Cr/V ratios) and 2. biogenic siliceous material and macerals. Composition varies up section and accounts for changes in the detrital supply due to eustatic sea-evel changes. Organic petrology shows presence of organic detritus within the Lhoty Fm and dominance of marine-derived macerals in the BRSF. Chemical and petrological features imply a progressive deepening of the basin. The studied succession was diagenetically altered (e.g. coalification of bituminite, illitisation of smectite and pyritisation).

Źródło:

Annales Societatis Geologorum Poloniae; 2009, 79, No 1; 53-66
0208-9068

Pojawia się w:

Annales Societatis Geologorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Provenance and diagenesis of siliciclastic and organic material in the Albian-Turonian sediments (Silesian Nappe, Lanckorona, Outer Carpathians, Poland): preliminary studies

Autorzy:

Wójcik-Tabol, P.
Ślączka, A.

Powiązania:

https://bibliotekanauki.pl/articles/191389.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Geologiczne

Tematy:

organic and inorganic geochemistry
Albian-Turonian
Silesian Nappe
Outer Carpathians
Polska

Opis:

The provenance and diagenesis of the siliciclastic and hemipelagic sediments of three lithostratigraphic units: Lhoty Formation, Barnasiówka Radiolarian Shale Formation (BRSF) and Variegated Shales from Lancko- rona area, Polish Outer Carpathians, was approached by means of petrological and geochemical analysis of the representative samples. Data show that studied succession was mainly derived from two sources: 1. a dominant terrigenous fine-grained components have affinity with average upper continental crust (basing on mineral detritus, K2O/Rb ratio and Y/Ni vs. Cr/V ratios) and 2. biogenic siliceous material and macerals. Composition varies up section and accounts for changes in the detrital supply due to eustatic sea-level changes. Organic petrology shows presence of organic detritus within the Lhoty Fm and dominance of marine-derived macerals in the BRSF. Chemical and petrological features imply a progressive deepening of the basin. The studied succession was diagenetically altered (e.g. coalification of bituminite, illitisation of smectite and pyritisation).

Źródło:

Annales Societatis Geologorum Poloniae; 2009, 79, No 2; 53-66
0208-9068

Pojawia się w:

Annales Societatis Geologorum Poloniae

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 33.

Tytuł:

Effect of Some Inorganic Nitrate Salts on the Ignition Delay Time of DMAZ-IRFNA and DMAZ-WFNA Bi-propellants

Autorzy:

Pakdehi, S. G.
Shirzadi, B.

Powiązania:

https://bibliotekanauki.pl/articles/358187.pdf

Data publikacji:

2018

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

DMAZ
liquid oxidizers
ignition delay time
inorganic nitrate salts
specific impulse

Opis:

Dimethylaminoethyl azide (DMAZ) is a good replacement for the hydrazine group in the space industry. However, it has a relatively long ignition delay time with the liquid oxidizer, white fuming nitric acid (WFNA), and is nonhypergolic with inhibited red fuming nitric acid (IRFNA). In this article, the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants were reduced by the addition of some inorganic nitrate salts, such as NH4NO3, KNO3, NaNO3, AgNO3 and LiNO3, to the liquid oxidizers. The results showed that WFNA containing 0.1 wt.%, 0.3 wt.% and 0.5 wt.% of LiNO3 reduced the ignition delay time of DMAZ-WFNA from 88 ms to 18 ms, 14 ms and 8 ms, respectively. The same percentages of LiNO3 caused the nonhypergolic DMAZ-IRFNA bi-propellant to have ignition delay times of 42 ms, 34 ms and 22 ms, respectively. Moreover, calculations indicated that the addition of LiNO3 to both oxidizers did not have a significant affect on the specific impulse of the bi-propellants. Consequently LiNO3 could be an appropriate additive for the reduction of the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants.

Źródło:

Central European Journal of Energetic Materials; 2018, 15, 1; 162-174
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Metodyka analiz izotopowych rozpuszczonego węgla nieorganicznego (DIC) i ich zastosowania w badaniach hydrogeologicznych i środowiskowych
Methodology and application of stable isotope analysis of dissolved inorganic carbon (DIC) in hydrogeology and environmental studies

Autorzy:

Szynkiewicz, A.
Drzewicki, W.
Jędrysek, M. O.

Powiązania:

https://bibliotekanauki.pl/articles/2074490.pdf

Data publikacji:

2006

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

rozpuszczony węgiel nieorganiczny (DIC)
izotop węgla
dissolved inorganic carbon
carbon isotopes

Opis:

The analysis of carbon isotope composition of dissolved inorganic carbon (DIC) is widely applied in hydrogeology and environmental studies. The method of analysis is simple and based on conversion of all DIC species to gaseus CO2 under acidic conditions. However, the analytical procedure may involve significant carbon isotope fractionation. Our experimental analysis showed that increasing the time of CO2 extraction influences the increase of ä13C(DIC) value as a result of re-dissolution of CO2 in the water expanded on the vacuum line or/and carbon isotope exchange between the extracted CO2 and the atmospheric CO2. The long time of sample storage yields an increase of ä13C(DIC) value and decrease of DIC concentration. The analytical precision up to š 0,1‰ may be achieved in the case of waters being analyzed few days after sampling. DIC concentration was evaluated according to height of peak 44 in the mass spectrum. The analytical precision of this method was š 2 mgCO2 per dm3. This method is very useful because the measurements of the height of peak 44 and carbon isotope composition of DIC can be performed simultaneously. However, this method is reliable for waters containing more than 4 mg CO2 per dm3

Źródło:

Przegląd Geologiczny; 2006, 54, 9; 797-806
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Sedimentary deposition and reflux of phosphorus (P) in the Eastern Gotland Basin and their coupling with P concentrations in the water column

Autorzy:

Hille, S.
Nausch, G.
Leipe, T.

Powiązania:

https://bibliotekanauki.pl/articles/49164.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

dissolved inorganic phosphorus
deposition
Gotland Basin
Baltic Sea
reflux
sediment
phosphorus

Opis:

In order to describe the role of sedimentary processes for the phosphorus (P) cycle in the open Baltic Proper, P deposition and reflux were quantified for the predominately anoxic sediments of the Eastern Gotland Basin. The study is based on investigations of 53 surface sediment samples and pore water samples from 8 sediment cores. The average P deposition rate was estimated at 0.20 g±0.18 g m−2 yr−1, the fluctuation being due to variable bulk sediment deposition rates. P refluxes were estimated by applying Fick’s First Law of Diffusion. A fairly good positive correlation between sedimentary P deposition and P release was obtained. P release from sediments by diffusion exceeds net P deposition by a factor of 2. This suggests that 2/3 of the deposited gross P is recycled in the sediments and released back into the water column; only 1/3 remains in the sediment permanently. A budget calculation demonstrates that the released dissolved inorganic phosphorus (DIP) accounts for the observed increase in DIP concentrations in the deep water during periods of stagnation, which is noticeable even at the surface P concentrations. Under such conditions and with the present remediation conditions it is not possible to freely manage P concentrations in the water column on short time scales.

Źródło:

Oceanologia; 2005, 47, 4
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

An Innovative Method for the Dehydration Hardening of Modified Inorganic Binders

Autorzy:

Izdebska-Szanda, I.
Kamińska, J.
Angrecki, M.
Palma, A.
Madej, W.

Powiązania:

https://bibliotekanauki.pl/articles/355665.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

moulding sands
inorganic binder
water glass
hardening with gaseous agents
dehydration

Opis:

The results of research on the possibility of using a gaseous medium (hot air) as a hardening agent for inorganic binders were discussed, and tests on the reclamation of waste moulding sands were carried out. The research programme also included the use of a modernized test stand for hardening of foundry sands with gaseous agents and a pilot plant for the sand reclamation. Cores made on the test stand were examined for the basic technological properties and were also used in moulds for the trial knocking out of castings. Two types of binders were tested, i.e. a modified water glass designated as Binder A and, for comparison, a reference material which was hydrated sodium silicate R145. The hardener for the sand mixtures was hot air (the dehydration of water glass). Trials of the sand reclamation were carried out in a laboratory pilot plant, installed and operating at the Foundry Research Institute. The obtained reclaim was added in different amounts to the sand mixtures subjected to technological tests. The next step included the manufacture of test moulds, pouring them with aluminium alloy, and knocking out of castings to test the collapsibility of moulds and cores.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 4; 2097-2102
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 37.

Tytuł:

Application of sol-gel process for preparation of functional materials

Autorzy:

Gaishun, V. E.
Demidenko, O. M.
Kosenok, Y. A.
Kovalenko, D. L.
Semchenko, A. V.
Strek, W.

Powiązania:

https://bibliotekanauki.pl/articles/385165.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

sol-gel
colored silica film
rust-proofing inorganic covers
colloidal nanosized silica

Opis:

A development of high-performance materials for electronics, optics, ceramics fabrication is restrained by traditional modes of their production. Basic technologies for materials include high-temperature physical and chemical processes and require special conditions to attain desired properties of final products. Advanced preparation methods for materials with new features are feasible on the basis of colloid-chemical processes and nanochemistry. In this respect the sol-to-gel transformation followed by solidification and chemical modification are of great interest to attain a variety of different functional properties of materials.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 121-123
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Zastosowanie elektroforezy kapilarnej do oznaczania wybranych jonów nieorganicznych w pozostałościach po przemianie wybuchowej materiałów pirotechnicznych
Application of capillary electrophoresis for selected inorganic ions determination after explosive transformation of pyrotechnic materials

Autorzy:

Wideł, Dariusz
Smagacz, Łukasz
Klepacz, Michał

Powiązania:

https://bibliotekanauki.pl/articles/1366460.pdf

Data publikacji:

2019

Wydawca:

Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD

Tematy:

materiały pirotechniczne
elektroforeza kapilarna
jony nieorganiczne
pyrotechnic materials
capillary electrophoresis
inorganic anions

Opis:

Zastosowano metodę elektroforezy kapilarnej (CE) do oznaczenia jakościowego i ilościowego jonów: ClO3-, ClO4-, NO3-, NH4+,K+ w pozostałościach po przemianie wybuchowej materiałów pirotechnicznych.Po wybuchu petardy hukowej FP3 i petardy wojskowej pobrano próbki gleby z miejsca wybuchu i poddano je ekstrakcji, a następnie analizie metodą CE. Wyznaczone granice oznaczalności wynosiły od 0,78 mg/l dla K+ do 3,12 dla NO-. Metoda CE pozwoliła na rozróżnienie materiałów pirotechnicznych na podstawie oznaczenia wybranych jonów w pozostałościach po wybuchu.
Capillary electrophoresis (CE) method was applied for qualitative and quantitative determination ClO3-, ClO4-, NO3-, NH4+,K+ , in pyrotechnic materials after explosive transformation. After ex- plosion of fire-cracker with black powder and military fire-cracker, soil samples from explosion area were collected, extracted and analyzed by CE method. Determined limits of quantifications were from 0.78 mg/L for K+ to 3.12 for NO-. The CE method allowed to distinguish pyrotechnic materials on the basis of selected ions determination in pyrotechnic materials residues.

Źródło:

Aparatura Badawcza i Dydaktyczna; 2019, 24, 2; 179-184
2392-1765

Pojawia się w:

Aparatura Badawcza i Dydaktyczna

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:

Evaluation of Some Inorganic Anions and Organic Compounds as Corrosion Inhibitors of Cu-Zn Alloys in H2SO4 and HNO3 Solutions

Autorzy:

Ahmed, Amal S. I.
Ghanem, Wafaa A.
Hussein, Walaa A.
Gaber, Ghalia A.

Powiązania:

https://bibliotekanauki.pl/articles/351226.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Cu-Zn alloys
oxy-acid solution
inhibition efficiency
inorganic anions
organic compounds

Opis:

Evaluation of inorganic and organic compounds as corrosion inhibitors of Cu-Zn alloys in H₂ SO₄ and HNO₃ solutions was studied using potentiodynamic and impedance spectroscopy along with scanning electron microscope (SEM) and energy dispersive X-Ray analyzer (EDX) investigations. The corrosion inhibition of Cu-Zn alloys was investigated in oxy acid solutions using inorganic potassium permanganate and di-hydrogen phosphate, amino acids as environmentally safe materials, commercial cooling water, and green tea extracts. Both potassium permanganate and di-hydrogen phosphate improve the corrosion resistance of Cu-Zn alloys. Phosphate appears more effective as corrosion inhibitor for Cu-Zn alloys than permanganate. The inhibition efficiency (IE%) of the different amino acids such as valine, leucine and lysine was also calculated. The experimental results have shown that amino acid-like lysine can be used as an efficient corrosion inhibitor for the Cu-Zn alloys in oxy acid solutions. This may be due to the presence of two amino groups adsorbed together. For lysine, inhibition efficiency, IE%, of ~87 and ~59 is for H₂SO₄ and ~96.3 and 54.9 for HNO₃ for alloy I and II respectively are observed. Due to the composition of green water have a great effect on the inhibition action on Cu-Zn alloys which reaching 91.8 and 96.5% for Alloy I and 95.4 and 87.1% for Alloy II in 0.5 M H₂ SO₄ and HNO₃ respectively. Although benzotriazole, in cooling water, is an excellent inhibitor suitable for use in a wide variety of environments, it has toxic properties. So, much of the recent researches have focused on formulating new and more environmentally acceptable preservation solutions. The green tea, as plant extract, will be very environmentally friendly. The EDX confirm the formation of a protective layer on the Cu-Zn alloys containing aluminum in Alloy II. This sequence reflects the beneficial effects of Al in Alloy II. The presence of 2.43% Al in Alloy II improves the corrosion resistance due to the formation of thin, transparent, stable and self-healing Al₂ O₃ layer. This confirmed the results obtained from the potentiodynamic polarization measurements and EIS methods.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 2; 639-651
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Effect of the Type of Inorganic Binder on the Properties of Microwave-Hardened Moulding Sands for Ablation Casting Technology

Autorzy:

Puzio, S.
Kamińska, J.
Angrecki, M.
Major-Gabryś, K.

Powiązania:

https://bibliotekanauki.pl/articles/353306.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

innovative technologies
ablation casting
moulding sands
microwave hardening
environmentally friendly inorganic binders

Opis:

The aim of this study is to demonstrate the possibility of using moulding sands based on inorganic binders hardened in a microwave chamber in the technology of ablation casting of aluminium alloys. The essence of the ablation casting technology consists in this that a mould with a water-soluble binder is continuously washed with water immediately after being poured with liquid alloy until its complete erosion takes place. The application of an environmentally friendly inorganic binder improves the ecology of the whole process, while microwave hardening of moulding sands allows moulds to be made from the sand mixture containing only a small amount of binder. The studies described in this article included microwave-hardened sand mixtures containing the addition of selected inorganic binders available on the market. The strength of the sands with selected binders added in an amount of 1.0; 1.5 and 2.0 parts by mass was tested. As a next step, the sand mixtures with the strength optimal for ablation casting technology, i.e. about 1.5 MPa, were selected and tested for the gas forming tendency. In the four selected sand mixtures, changes occurring in the samples during heating were traced. Tests also included mould response to the destructive effect of ablation medium, which consisted in the measurement of time necessary for moulds to disintegrate while washed with water. Tests have shown the possibility of using environmentally friendly, microwave-hardened moulding sands in ablation casting of aluminium alloys.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1385-1390
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Odpady nieorganiczne przemysłu chemicznego - foresight technologiczny - podsumowanie badań
The prospective studies on environmental impact of inorganic waste streams until 2030; research summary

Autorzy:

Cichy, B.

Powiązania:

https://bibliotekanauki.pl/articles/143244.pdf

Data publikacji:

2012

Wydawca:

Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem

Tematy:

foresight technologiczny
odpady nieorganiczne
gospodarka odpadami
analiza delficka
analiza SWOTC
technologie nieorganiczne
scenariusze rozwoju
technological foresight
inorganic wastes
Delphi analysis
SWOTC analysis
SWOTC analyses
inorganic technology
development scenario

Opis:

Niniejszy artykuł stanowi krótkie podsumowanie realizowanego w okresie: styczeń 2010 do marzec 2012 projektu badawczego pt. "Odpady nieorganiczne przemysłu chemicznego - foresight technologiczny" (www.inorganicwaste.eu). Projekt ten realizowany przez konsorcjum Instytutu Nawozów Sztucznych - Oddział Chemii Nieorganicznej IChN w Gliwicach, Instytutu Ochrony Środowiska w Warszawie i Centrum Nauk o Decyzji i Prognozowania Fundacji Progress and Business w Krakowie finansowany był z POIG. Celem badań było pozyskanie, usystematyzowanie i analiza interdyscyplinarnej wiedzy dotyczącej zarówno podstawowego obszaru badań - gospodarki odpadami nieorganicznymi w Polsce teraz i w perspektywie do roku 2030 - jak i otoczenia ekonomicznego, społeczno politycznego i ekologicznego. Przedstawiono przebieg badań oraz ich rezultat w postaci trzech alternatywnych scenariuszy rozwoju. W tekście przedstawiono skrócone wersje scenariuszy.
In this paper are presented the scope, goals, methodology analysis and results of the research project "Technological foresight of inorganic waste from chemical industry" (www.inorganicwaste.eu). The project is carried out by the consortium consisting of the Fertilizers Research Institute, Inorganic Chemistry Division in Gliwice, the Progress and Business Foundation, Cracow, and the Institute of Environmental Protection, Warsaw during the period of January 2010 - March 2012. The main goal of the study within this Project is to acquire, structure and analysis the interdisciplinary knowledge on inorganic waste as well as its economical, ecological, social and political environment. The end result of research is to generate three alternative development scenarios that are presented here in abridged form.

Źródło:

Chemik; 2012, 66, 3; 215-218
0009-2886

Pojawia się w:

Chemik

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Występowanie niebezpiecznych związków organicznych i pierwiastków śladowych w osadach dennych zbiorników zaporowych
Hazardous organic and trace element occurrence in bottom sediments of dam reservoirs

Autorzy:

Dmitruk, U.
Jancewicz, A.
Tomczuk, U.

Powiązania:

https://bibliotekanauki.pl/articles/236973.pdf

Data publikacji:

2013

Wydawca:

Polskie Zrzeszenie Inżynierów i Techników Sanitarnych

Tematy:

organic pollutants
inorganic pollutants
PAHs
PCBs
zanieczyszczenia organiczne
zanieczyszczenia nieorganiczne
WWA
PCB

Opis:

Quality of bottom sediments was examined for 15 reservoirs classified as the Sudeten, Carpathian or lowland reservoirs, according to their location. These reservoirs serve multiple functions including flood control, providing hydroelectric power, supplying water for general public, industry or agriculture and recreational. The study was conducted in 2008 and 2010. The scope of the analysis included trace elements (As, Cr, Zn, Cd, Cu, Ni, Pb and Hg) and organic compounds: polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and chloroorganic pesticides. It was determined that concentration of trace element compounds ranged from <0.01 mg/kg to 422 mg/kg, while of PAHs from <0.0001 mg/kg to 7.5 mg/kg, PCBs from <0.0001 mg/kg to 0.78 mg/kg and of chloroorganic pesticides from <0.0002 mg/kg to 0.065 mg/kg. The sediments from the Sudeten reservoirs were found to be the most polluted, while the sediments from the lowland reservoirs the least.
Wykonano badania jakości osadów dennych pobranych z 15 zbiorników zaporowych, które w zależności od lokalizacji przyporządkowano do grupy zbiorników sudeckich, karpackich lub nizinnych. Zbiorniki te służą do różnych celów, takich jak ochrona przeciwpowodziowa, energetyka wodna, zaopatrzenie w wodę ludności, przemysłu i rolnictwa oraz rekreacja. Badania wykonano w latach 2008 i 2010. Zakres analizy osadów dennych obejmował pierwiastki śladowe (As, Cr, Zn, Cd, Cu, Ni, Pb i Hg) i związki organiczne (wielopierścieniowe węglowodory aromatyczne – WWA, polichlorowane bifenyle – PCB i pestycydy chloroorganiczne). Stwierdzono, że zawartość pierwiastków śladowych w osadach wynosiła od <0,01 mg/kg do 422 mg/kg; WWA od <0,0001 mg/kg do 7,5 mg/kg, PCB od <0,0001 mg/kg do 0,78 mg/kg, a pestycydy chloroorganiczne od <0,0002 mg/kg do 0,065 mg/kg. Najbardziej zanieczyszczone okazały się osady denne pobrane ze zbiorników sudeckich a najmniej z nizinnych.

Źródło:

Ochrona Środowiska; 2013, 35, 2; 63-68
1230-6169

Pojawia się w:

Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Analiza złożonych materiałów o strukturze włókien mineralnych w oparciu o nieinwazyjne metody spektroskopowe
Analysis of the composite materials having a structure of the mineral fibers based on the non-invasive spectroscopic methods

Autorzy:

Śmieszek-Lindert, W.
Bajorek, A.
Kubacki, J.

Powiązania:

https://bibliotekanauki.pl/articles/142437.pdf

Data publikacji:

2015

Wydawca:

Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem

Tematy:

Wełna mineralna
nieorganiczny materiał izolacyjny
XRF
XPS
Mineral wool
inorganic insulating material

Opis:

W artykule przedstawiono skład chemiczny warstwy powierzchniowej i objętościowej wełny szklanej i skalnej. Analizy zostały przeprowadzone przy użyciu dwóch metod instrumentalnych (nieinwazyjnych technik), rentgenowskiej analizy fluorescencyjnej (XRF, X-Ray Fluorescence) i rentgenowskiej spektrometrii fotoelektronów (XPS, X-Ray Photoelectron Spectroscopy). Zaobserwowano, że skład wełny szklanej i skalnej jest zróżnicowany. Charakteryzuje się on zawartością głównych tlenków, takich jak SiO2, Al2O3, CaO, MgO oraz Fe2O3. Analizowane wełny mineralne są materiałami o złożonym składzie chemicznym, a użyte metody spektroskopowe w dobrym stopniu odzwierciedlają ich główne składniki. Wykazano przewagę rentgenowskiej analizy fluorescencyjnej (XRF) nad metodą XPS, oraz ich wzajemną komplementarność.
Chemical composition of glass wool and stone wool has been investigated. Researches were carried out by using two analytical techniques, X-ray fluorescence analysis (XRF) and X-ray photoelectron spectroscopy (XPS). The both methods are non-destructive. It was observed that composition of the glass wool and stone wool is variable, but it characterizes by the content of the main oxides as SiO2, Al2O3, CaO, MgO, and Fe2O3. Analyzed wool samples are materials having complex chemical composition, and used spectroscopic methods in good extent reflect their main ingredients. It has been demonstrated the advantage of XRF method over the use of XPS technique, and their mutual complementarity.

Źródło:

Chemik; 2015, 69, 7; 411-418
0009-2886

Pojawia się w:

Chemik

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Kształtowanie się stanu ilościowego azotu mineralnego w glebach organicznych pod użytkami zielonymi w Polsce
The amount of inorganic nitrogen in organic soils under grasslands in Poland

Autorzy:

Pietrzak, S.

Powiązania:

https://bibliotekanauki.pl/articles/337793.pdf

Data publikacji:

2015

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

azot mineralny
gleby organiczne
monitoring
użytki zielone
grasslands
inorganic nitrogen
organic soils

Opis:

W pracy przedstawiono wyniki rozpoznania nagromadzenia azotu mineralnego w glebach organicznych pod użytkami zielonymi w Polsce. Rozpoznanie to przeprowadzono na podstawie wyników badań monitoringowych realizowanych w latach 2008–2012 przez Krajową Stację Chemiczno-Rolniczą w Warszawie i podlegające jej stacje okręgowe, we współpracy z Instytutem TechnologicznoPrzyrodniczym w Falentach. Stwierdzono m.in., że w analizowanym okresie w badanych glebach: 1) przeciętna zawartość azotu mineralnego i zasoby tego składnika w profilu do 30 cm pod powierzchnią terenu wynosiły odpowiednio ok. 51 mg N•kg^-1 s.m. i ok. 118 kg N•ha^-1 w okresie wiosennym oraz ok. 55 mg N•kg^-1 s.m. i ok. 130 kg N•ha^-1 w okresie jesiennym, 2) udział azotu amonowego w całkowitej zawartości azotu mineralnego wynosił średnio ok. 77% w okresie wiosennym i ok. 66% w porze jesiennej, 3) w sezonie letnim zawartość azotu azotanowego oraz zasoby azotu mineralnego ulegały zwiększeniu, a w okresie zimowym – zmniejszeniu, natomiast zawartość azotu amonowego zmieniała się w odwrotnym kierunku, 4) przeciętnie w sezonie wegetacyjnym zasoby azotu mineralnego w warstwie 0–30 cm zwiększały się o 12,1 kg N•ha^-1 , a w okresie po nim następującym – zmniejszały o 11,9 kg N•ha^-1 , 5) istotny wpływ na stan zasobów azotu mineralnego miały temperatura powietrza oraz opady atmosferyczne.
The paper presents accumulation of inorganic nitrogen in organic soils under grasslands in Poland. The recognition of nitrogen status was made based on results of monitoring carried out in the years 2008–2012 by the National Chemical-Agricultural Station in Warsaw and its subordinate regional stations in cooperation with the Institute of Technology and Life Sciences in Falenty. It was found that in the study period: 1) mean concentration of inorganic nitrogen and its resources in the upper 30 cm soil layer were 51 mg N•kg^-1 DM and 118 kg N•ha^-1 , respectively, in spring and 55 mg N•kg^-1 DM and 130 kg N•ha^-1 in autumn, 2) ammonium-nitrogen constituted on average 77% and 66% of the total soil inorganic nitrogen in spring and autumn, respectively, 3) concentrations of nitratenitrogen and resources of inorganic nitrogen increased in summer and decreased in winter while concentrations of ammonium-nitrogen changed in opposite direction, 4) resources of inorganic nitrogen in the upper 30 cm soil layers increased by 12.1 kg N•ha^-1 in the vegetation season to decrease by 11.9 kg N•ha^-1 afterwards, 5) air temperature and atmospheric precipitation significantly affected inorganic nitrogen resources.

Źródło:

Woda-Środowisko-Obszary Wiejskie; 2015, 15, 2; 87-96
1642-8145

Pojawia się w:

Woda-Środowisko-Obszary Wiejskie

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Wpływ preparatów Roundup 360 SL i Roundup 360 Plus na aktywność wybranych fosfataz w glinie piaszczysto-ilastej
Effect of roundup 360 sl and roundup 360 plus on activity of some phosphatases in sandy clay loam

Autorzy:

Płatkowski, M.
Telesiński, A.

Powiązania:

https://bibliotekanauki.pl/articles/339321.pdf

Data publikacji:

2017

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

fosfomonoesterazy
fosfotriesteraza
gleba
glifosat
pirofosfataza nieorganiczna
glyphosate
inorganic pyrophosphatase
phosphomonoeterases
phosphotriesterase
soil

Opis:

Celem podjętych badań było oznaczenie wpływu dwóch preparatów herbicydowych zawierających glifosat – Roundup 360 SL (zawartość glifosatu w postaci soli izopropyloaminowej – 360 g∙dm^-3) i Roundup 360 Plus (zawartość glifosatu w postaci soli potasowej – 360 g∙dm^-3) na aktywność: fosfomonoesterazy kwaśnej i alkalicznej, pirofosfatazy nieorganicznej oraz fosfotriesterazy w glebie. Badania przeprowadzono w warunkach laboratoryjnych na glebie typu czarne ziemie o składzie granulometrycznym gliny piaszczysto-ilastej i zawartości Corg 33,81 g∙kg^-1, pobranej z Równiny Pyrzyckiej. Wprowadzone do gleby dawki preparatów przeliczono tak, aby ilość dodanej substancji aktywnej wynosiła 1, 10, 100 mg∙^-1. Punktem odniesienia była gleba bez dodatku herbicydów. Pomiary aktywności enzymów przeprowadzono w 1., 7., 14., 28., 56. dniu od założenia doświadczenia. Na podstawie przeprowadzonych badań stwierdzono, że aplikacja preparatów zawierających glifosat w formie soli izopropyloaminowej (Roundup 360 SL) i soli potasowej (Roundup 360 Plus) spowodowała istotne zmiany aktywności fosfataz glebowych. Spośród oznaczanych fosfataz najbardziej wrażliwa na obecność w glebie preparatów zawierających glifosat okazała się pirofosfataza nieorganiczna. Ponadto przeprowadzona analiza wariancji η² wykazała, że rodzaj preparatu Roundup miał największy wpływ jedynie na aktywność fosfotriesterazy, podczas gdy aktywność pozostałych fosfataz kształtowana była głównie przez czas trwania doświadczenia.
The aim of study was to assess effect of two formulations containing glyphosate: Roundup 360 SL (content of isopropylamine glyphosate salt – 360 g∙dm^-3) and Roundup 360 Plus (content of potassium glyphosate salt – 360 g∙dm^-3) on activity of acid phosphomonoesterase, alkaline phosphomonoesterase, phosphotriesterase and inorganic pyrophosphatase in soil. The experiment was carried out in laboratory in samples collected from Pyrzycka Plain (sandy loamy clay, Corg 33.81 g∙kg^-1). Dosages of formulations Roundup, applied to the soil, were calculated so the amounts of glyphosate were: 1, 10, 100 mg∙kg^-1. Soil without herbicides was reference. On days: 1, 7, 14, 28 and 56 the activities of phosphatases were determined spectrophotometrically. The obtained results showed that application of formulations containing isopropylamine glyphosate salt (Roundup 360 SL) and potassium glyphosate salt (Roundup 360 Plus) caused significant changes in phosphatase activities. Among phosphatases, measured in experiment, inorganic pyrophosphatase was the most vulnerable to the presence on glyphosate formulations. Furthermore, the analysis of variance η² showed that the type of formulation Roundup had the greatest effect only on the phosphotriesterase activity, while remaining phosphatase activity was changed mainly by the duration of the experiment.

Źródło:

Woda-Środowisko-Obszary Wiejskie; 2017, 17, 2; 149-156
1642-8145

Pojawia się w:

Woda-Środowisko-Obszary Wiejskie

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Potential contribution of nanotechnology to the circular economy of plastic materials

Autorzy:

Distaso, Monica

Powiązania:

https://bibliotekanauki.pl/articles/1429957.pdf

Data publikacji:

2020

Wydawca:

Centrum Badań i Innowacji Pro-Akademia

Tematy:

nanoparticles
inorganic pigments
polymers
nanocomposites
packaging
nanocząstki
pigmenty nieorganiczne
polimery
nanokompozyty
opakowanie

Opis:

The problem of plastic accumulation in the environment requires the development of effective strategies to shift the paradigm of used plastics from wastes to resources. In the present contribution, after an overview of the current plastic management strategies, the possible role of nanotechnology to this emerging field is considered. In particular, the challenges related to the use of nano-additives to improve the properties of recycled plastics is discussed based on the fundamental aspects of colloid stabilisation. Finally, the contribution of nanotechnology to the fabrication of effective catalysts for the depolymerisation of plastics into the constituent monomers is outlined.

Źródło:

Acta Innovations; 2020, 37; 57-66
2300-5599

Pojawia się w:

Acta Innovations

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Characterization of Selected Parameters of Organic-Inorganic Hybrid Membranes Based on Various Polymers and Nd-Fe-B Fillers

Autorzy:

Rybak, A.
Kaszuwara, W.

Powiązania:

https://bibliotekanauki.pl/articles/352783.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

organic-inorganic hybrid membranes
magnetic measurements
rheological parameters
mechanical properties
gas separation

Opis:

In this paper magnetic organic-inorganic hybrid membranes based on EC, PPO polymer matrices and various magnetic powder microparticles were synthesized and studied. Constant pressure permeation technique and the Time Lag method were used to obtain the gas transport coefficients. The mechanical, rheological and magnetic parameters of magnetic hybrid membranes were examined. It was found that their separation and gas transport properties (D, P, S and α) were improved with the decrease in powder particle size and the increase of membrane’s remanence, saturation magnetization and magnetic particle filling. The increase of the magnetic powder addition and a decrease of its granulation improved also mechanical and rheological parameters of the tested membranes. This improvement also had a positive effect on their gas separation properties and their potential usage in the future.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 4; 1825-1832
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Effects of inorganic nanoparticles on mechanical and morphological properties of wood flour-polypropylene nano composites

Autorzy:

Ismaeilimoghadam, S.
Masoudifar, M.
Nosrati, B.
Shamsian, M.

Powiązania:

https://bibliotekanauki.pl/articles/52324.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna

Tematy:

inorganic nanoparticle
nanoparticle
mechanical property
morphological property
wooden-plastic composite
wooden composite
nanocomposite

Źródło:

Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2016, 59, 196
1644-3985

Pojawia się w:

Drewno. Prace Naukowe. Doniesienia. Komunikaty

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Polypropylene Crystallisation in the Presence of Inorganic Additives
Krystalizacja polipropylenu w obecności dodatków nieorganicznych

Autorzy:

Ujhelyiová, Anna
Horbanová, Ľuba
Petková, Mária
Ryba, Jozef
Annus, Július

Powiązania:

https://bibliotekanauki.pl/articles/232376.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

polypropylene fibre
PP
inorganic additives
modification
crystallisation
włókna polipropylenowe
dodatki nieorganiczne
modyfikacja
krystalizacja

Opis:

The physical modification of polypropylene (PP) fibres with inorganic additives ensures more intense anchoring of PP fibres in constructional composites, which leads to great improvement of the function of PP fibres in relation to the transmission and absorption of deformation energy in the formation and loading of composites. This work focuses on the preparation of PP fibres modified with untreated and treated CaCO₃ and SiO₂ for constructional composites. It investigated the effect of inorganic additives on the thermal, thermo-mechanical and sorption properties of these fibres. Melting and crystallisation temperatures as well as the melting and crystallisation enthalpies of PP and modified PP fibres depend on the additives and conditions of preparation of PP fibres applied. A lower amount of inorganic additives improves and a higher amount of inorganic additives worsened the dimensional stability of the PP fibres observed. The addition of inorganic fillers increased the water vapour sorption of the modified PP fibres in comparison with the pure PP fibre.
Fizyczna modyfikacja włókien polipropylenowych (PP) za pomocą nieorganicznych dodatków zapewnia bardziej intensywne umocowanie włókien PP w kompozytach konstrukcyjnych, co powoduje znaczną poprawę funkcji włókien PP w stosunku do przenoszenia i absorpcji energii odkształcenia i obciążenia kompozytów. Przeprowadzone prace koncentrowały się na przygotowaniu włókien PP modyfikowanych nieoczyszczonymi i poddanymi obróbce CaCO₃ i SiO₂ do zastosowania w kompozytach konstrukcyjnych. Zbadano wpływ nieorganicznych dodatków na właściwości termiczne, termo-mechaniczne i sorpcyjne włókien. Stwierdzono, ze temperatury topnienia i krystalizacji oraz entalpie topnienia i krystalizacji PP i modyfikowanych włókien PP są zależne od dodatków i warunków wytwarzania włókien PP. Mniejsza ilość nieorganicznych dodatków poprawia, a większa ilość pogarsza stabilność wymiarową obserwowanych włókien PP. Dodatek nieorganicznych wypełniaczy zwiększył sorpcję pary wodnej modyfikowanych włókien PP w porównaniu z czystymi włóknami PP.

Źródło:

Fibres & Textiles in Eastern Europe; 2019, 2 (134); 30-38
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Conservation interventions at the site of Berenike (Egypt): challenges and solutions in an ancient city of the Eastern Desert

Autorzy:

Maestro, Delia Eguiluz

Powiązania:

https://bibliotekanauki.pl/articles/1683099.pdf

Data publikacji:

2018-07-09

Wydawca:

Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego

Tematy:

desert conditions of preservation
conservation interventions
carbonized wood
organic and inorganic artifacts
stabilizing

Opis:

The desert climate of the Berenike site in the Eastern Desert of Egypt are conducive to the preservation of substantial quantities of both organic and inorganic archaeological remains. Field conservation is thus fundamental and indispensable to each archaeological campaign. All interventions have as the main objective stabilizing the material, facilitating the identification of finds and ensuring artifact conservation as much as possible. The paper focuses on the specific conditions making this site unique and an ideal place for the preservation of all materials, paying special attention to the ancient harbor area with its significant number of remains of carbonized wood belonging on the whole to several ancient Roman ships. Interventions on these materials are discussed with the goal of determining the basic problems faced by conservators working at this site, the extent to which these interventions should be carried and the scientific dialogue with archaeologists and field specialists.

Źródło:

Polish Archaeology in the Mediterranean; 2017, 26(2); 213-225
1234-5415

Pojawia się w:

Polish Archaeology in the Mediterranean

Dostawca treści:

Biblioteka Nauki

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