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Wyświetlanie 1-15 z 178
Tytuł:
Physical properties of extrusion-cooked vegetable raw materials
Autorzy:
Opydo, B.
Moscicki, L.
Powiązania:
https://bibliotekanauki.pl/articles/24935.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
physical property
raw material
moisture content
chemical composition
extrudate
extrusion-cooking
cereal
vegetable
Źródło:
International Agrophysics; 1999, 13, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polish plants as raw materials for cosmetic purposes
Autorzy:
Mietlińska, Katarzyna
Przybyt, Małgorzata
Kalemba, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/410446.pdf
Data publikacji:
2019
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
saponins
polyphenols
cosmetics
herbs
screening
saponiny
polifenole
kosmetyki
zioła
Opis:
The cosmetics market is more and more demanding, and there is a constant request for new products. The aim of the study was to find plant materials occurring commonly in Poland that would have a multidirectional effect on the skin. Research focuses on plants with high content of saponins and polyphenols. Ability to create foam and ability to reduce the surface tension of water as a determinant of saponin content was checked. The Folin-Ciocalteu test was made to check the content of polyphenols. Fifty-seven raw materials were examined. To the most promising for cosmetic purposes belong goldenrods (Solidago), especially their leaves. Much better results were obtained for S. canadensis and S. gigantea, than S. virgaurea.
Źródło:
Biotechnology and Food Science; 2019, 83, 2; 95-106
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Traditional and new raw materials for spirit beverage production
Autorzy:
Ługowoj, Szymon
Balcerek, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1830643.pdf
Data publikacji:
2021-09-29
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
cereal grain
pseudo-cereals
starch
fermentation
agricultural distillate
vodka
Opis:
The ethanol production industry is a fast growing branch of the economy in many countries, and there is a rich tradition of spirit beverage production of many unique drinks such as Polish vodka and Starka or Irish and Scotch whisk(e)y, all of which have unique organoleptic features. This variety is possible thanks to different raw materials used for production such as rye, barley or corn and potatoes, as well as technological solutions developed over the generations of manufacturing. Rye deserves a closer look due to its low growth requirements and many different uses as well as its long tradition of cultivation, especially in Poland. On the other hand, manufacturers are currently interested in using new, original raw materials for the production of so-called craft alcohols. Buckwheat is an example of a raw material that can be successfully used in the production of original spirits.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2021, 17; 70-78
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unconventional vegetable oils as raw materials for biodiesel production
Autorzy:
Ambrosewicz-Walacik, M.
Tańska, M.
Walacik, M.
Kozłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/133654.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
unconventional vegetable oils
quality
fatty acids composition
biofuels production
niekonwencjonalne oleje roślinne
jakość
skład kwasów tłuszczowych
produkcja biopaliw
Opis:
The aim of the study was to determine the possibility of using the unconventional vegetable oils for the biofuel production. The research material were cold-pressed oils from the seeds of milk thistle, hemp and evening primrose. After conducting the initial physicochemical characteristics of oil samples, including the determination of sulphur content, acid number, viscosity at 40°C, density at 15ºC, oxidation stability and fatty acid composition, analysed oils have been subjected to the transesterification process. The roduced methyl esters were further characterized by the above-mentioned features. Additionally, the temperatures of cold filter plugging point, cloud point and flash point were determined. On the basis of the conducted analyses it was demonstrated that the obtained oils, due to the high, far in excess of acceptable, values of the viscosity and density, and too low oxidative stability could not be used as a pure fuel. A similar conclusion was formulated in case of the produced methyl esters.
Źródło:
Combustion Engines; 2017, 56, 1; 197-200
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radioactivity of some building and raw materials used in Croatia
Autorzy:
Sofilić, T.
Barišić, D.
Sofilić, U.
Đuroković, M.
Powiązania:
https://bibliotekanauki.pl/articles/778819.pdf
Data publikacji:
2011
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
radioaktywność
materiały budowlane
popiół lotny
spektometr promieniowania gamma
skuteczna dawka roczna
radioactivity
building materials
fly ash
Gamma-ray spectrometer
annual effective dose
Opis:
In the present study, the activity concentrations of 226Ra, 232Th, 40K in some building and raw materials used in Croatia were measured by using a gamma-ray spectrometer with the HPGe detector. The average activity concentrations of the studied different building and raw materials ranged from 11.6 š 1.7 (concrete) to 251.2 š 25.7 Bqkg-1 (GBFS), 14.0 š 2.7 (concrete) to 54.4 š 8.3 (coal fly ash) and 147.2 š 19.0 (concrete) to 773.7 š 82.0 Bqkg-1 (tuff) for 226Ra, 232Th and 40K, respectively. Radium equivalent activity, activity concentration index, absorbed gamma dose rate indoor due to the external exposure and corresponding annual effective dose were determined to estimate the exposure risk arising due to the use of these building and raw materials.
Źródło:
Polish Journal of Chemical Technology; 2011, 13, 3; 23-27
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Ajuga reptans extracts as potential cosmetic raw materials
Autorzy:
Dziki, Anna
Malinowska, Magdalena
Sikora, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/27315671.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
root extract
leaf extract
antipollution cosmetic
face cream
washing gels
eye serum
Opis:
In the study, the possibility of an application of Ajuga reptans leaf and root extracts in antipollution cosmetics was investigated. The influence of Ajuga extracts on the skin condition was also evaluated. Both leaf and root Ajuga ethanolic extracts were obtained and added to the developed cosmetic formulations. Two types of emulsion W/O and O/W, washing gels and eye serum, containing as an active substance Ajuga extracts were prepared. For the stable formulations physicochemical and user properties were studied. The obtained results show that cosmetic products, containing the Ajuga reptans extracts, positively affect the skin condition: causing an improvement in the degree of skin hydration and elasticity, reducing the skin pores size and skin hyperpigmentation, and reducing the wrinkles depth.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 4; 44--51
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation of composites based on raw materials for orthopedic equipment
Autorzy:
Szaraniec, B.
Morawska-Chochół, A.
Stodolak-Zych, E.
Powiązania:
https://bibliotekanauki.pl/articles/284289.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
composites
degradation
raw material
orthopaedics
Opis:
Eco-composites based on natural raw materials such as polylactide and plant fibres (e.g. flax, hemp, jute) show many important features which enable them to be used as potential materials for biomedical engineering. Availability of the raw materials and low costs of production, capability to enhance mechanical parameters and also controlled time of degradation in the environment allow considering them as materials for rehabilitation equipment, orthopedic supplies or materials for medical packages. Such materials due to the presence of the natural fibres provide higher comfort during their utilization and then they undergo safe biodegradation which is non-harmful for the environment [1,2]. The work presents attempts on fabrication of composites based on polylactide (PLA, Ingeo 3051D, Nature works, USA) reinforced with short flax and jute fibres. The fibres were mechanically comminuted to the length of 1-2 mm. Preparation of PLA/fibres mixture took part in two stages. The first one consisted in drying of the polymer granulate and the fibrous filler at 60 degrees of Celsius for 2 h. The second stage the granulate/fibres mixture was homogenized using vertical screw injection moulding machine (Multiplas). The obtained mixture was mechanically comminuted with a laboratory grinder (Testchem). Volume fraction of the fibres was nit higher then 5 %. The granulates were used to prepare PLA/natural fibres composites in the form of paddle-shaped samples (according to PN-EN ISO 527) by the injection method. The injection took place at 165 degrees of Celsius and pressure of 80 kg/cm2. The samples were subjected to hydrolytic degradation tests (incubation in distilled water at 37 degrees of Celsius, 15 weeks) and biological degradation (composting in an eco-composter, TERMO-410 with the addition of Radvit activator which contains composting bacteria and selected fungi cultures which support biodegradation and accelerate degradation of organic wastes, 15 weeks). The effect of the degradation environment on the composite material was determined on the basis of changes of its mechanical properties (tensile strength, Young's modulus) using an universal testing machine (Zwick 1453). The degradation process was monitored by FT-IR spectroscopy of the composite samples (transmission method, BioRAD 60FT). Changes related to the polymer chain degradation were assessed on the basis of viscosimetric measurements (Hoppler method). The carried out investigations proved, that during both the composting and the incubation in water a gradual degradation of the material takes place. Its visual effect was decrease of the tensile strength of the composites for about 70% for PLA/5% jute and for c.a. 10% for PLA/5% hemp and their Young's modulus for about 25 % for PLA/5% jute and for c.a. 10% for PLA/5% hemp. The changes were caused by decrease of molecular weight (Mn) of the polymer matrix from 100 to 28 kDa for PLA/5% hemp, and from 136 to 48 kDa for PLA/5% jute. The change of the polymer structure was faster in the case of degradation in water environment. This effect was related to facilitated migration of medium (water) inside the material and possibility of washing out and transport of products of the polymer chain disintegration. Additionally, the present fibrous phase which is characterized by high water absorbability may became a reservoir of both the medium and the degradation products. Biodegradation in the compost heap was slower and it was an example of synergic effect of hydrolytic degradation and biodegradation caused by the microorganisms. This process could be observed on the FT-IR spectra recorded during degradation in the compost heap, where longer composting time led to increasing disproportion between bands indicating increasing fraction of hydroxyl, carboxyl and carbonyl groups in relation to groups characteristic for PLA chain. In the case of biodegradation the process progress is related to such variable factors as: amount and type of the bacteria and fungi cultures, humidity and temperature. In conclusion, it may be stated that the proposed PLA/natural fibres composite materials are an alternative solution for many fields of biomedical engineering especially for rehabilitation and orthopedic provision.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 147
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Known and unknown products from raw materials of plant origin
Autorzy:
Dąbrowska, Justyna A.
Powiązania:
https://bibliotekanauki.pl/articles/1179520.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
biological activity
essential oil
fluidolat®
hydrodistillation
hydrosol
plant material
Opis:
The products from raw materials of plant origin are a great source of the biologically active compounds with a wide range of activities and properties, especially antimicrobial, antioxidant, and anti-inflammatory. Typically, bioactive compounds of plants are produced as secondary metabolites and are sourced mostly as essential oils and hydrosoles. Lately, new, unique and innovative product name fluidolat® are developed by Śmigielski and his co-workers at the Technical University of Lodz [1,2]. These are components which unquestionably has many positive aspects, mostly high application potential, health benefit, biological activity and sensory value. In this article general characteristic of essential oils, hydrosoles, and fluidolat®, as well as a few words about their application and biological activity are presented.
Źródło:
World Scientific News; 2017, 76; 23-28
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Swelling pressure of natural and modified smectite-bearing clay raw materials
Autorzy:
Panna, W.
Wyszomirski, P.
Szumera, M.
Powiązania:
https://bibliotekanauki.pl/articles/110772.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
clay raw materials
swelling pressure
sodium activated smectites
waterproofing materials
Krakowiec clays
Triassic clay
Opis:
Smectite clays, due to their barrier properties and swelling ability, are often applied for waterproofing purposes. A proper value of swelling pressure is one of the parameters, which must be met by the fillers used in hybrid waterproofing materials. The authors determined the swelling pressure of selected clay raw materials in their natural state and after chemical modification. This parameter was measured by the Komine method, as this procedure is more accurate than the standard edometric method. The authors introduced some changes in the method. The samples represent Krakowiec clays (Miocene) and a Triassic clay, collected in active pits of building clays, which are widely exploited in south Poland. The content of the smectite group minerals, determined from the sorption of methylene blue and copper(II) triethylenetetramine, ranges between 15 and 35%. Further characteristics of the clays were obtained with X-ray diffraction, chemical analyses (calcium carbonate content including) and pH measurements. It has been found that the activation of smectite clays with sodium lowers their swelling pressure as water penetrates easier the interlayer spaces of the smectites modified. This is important from the viewpoint of assessing the quality of bentonite fillers.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 127-135
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In Vitro Bioactivity Study of Pure Wollastonite Prepared from Local Raw Materials
Autorzy:
Chehlatt, S.
Harabi, A.
Oudadesse, H.
Harabi, E.
Powiązania:
https://bibliotekanauki.pl/articles/1400570.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Je
81.05.Mh
87.85.jj
Opis:
CaSiO₃ ceramics have been proposed as a medical material for artificial bone and dental root, since they proved to be bioactive and biocompatible. In this study, CaSiO₃ powders were synthesized by mixing of Calcium oxide (CaO) and (SiO₂) for 3 h, and subsequent calcination of the mixture at 710°C for 2 h. The compacts were conventionally sintered at 1150°C for 2 h. Moreover, the in vitro bioactivity of wollastonite was investigated by soaking the powders in simulated body fluid (SBF) for various time periods to analyze the nucleation and growth of hydroxyapatite (HA) on the surface of the powders. The obtained results showed that hydroxy-carbonate-apatite (HCA) can be formed on the surface of α-CaSiO₃ particles soaked in SBF solution for 3 days, and a continuous layer of dense deposits of HCA covered the surface of α-CaSiO₃ powders after 15 days of soaking in SBF solution. Besides this, α-CaSiO₃ showed strong hydration when soaked in SBF solution and the hydration was favorable for formation of HCA. Finally, obtained results indicate that α-CaSiO₃ showed to be highly bioactive through the formation of homogeneous apatite layer.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 925-927
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Competitiveness of chief producers of plant raw materials in intra-EU trade
Autorzy:
Pawlak, K.
Powiązania:
https://bibliotekanauki.pl/articles/573054.pdf
Data publikacji:
2010
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
competitiveness
producer
plant raw material
comparative advantage
export
import
European Union
trade
product group
cereal
oil seed
fruit
vegetable
Opis:
The aim of the paper was to assess the competitive position of the most important producers of plant raw materials in the intra-EU trade in 2004 and 2008. The analysis covered such product groups as cereals, oil seeds, fruit and vegetable. The competitiveness was assessed with the use of a selected set of quantitative measures of international competitive position. Moreover, the shares of the studied countries in the EU trade were assessed as well as the relative intensity of plant raw materials export from each country.
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2010, 10(25), 3
2081-6960
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern trade standards for steel raw materials
Standardy handlowe współczesnych surowców stali
Autorzy:
Krzak, M.
Paulo, A.
Powiązania:
https://bibliotekanauki.pl/articles/215916.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
cena stali
ruda żelaza
koncentrat żelaza
koks
złom stalowy
price of steel
iron ore
fruit concentrate
coke
steel scrap
Opis:
Steel and cast-iron products, due to their low price and beneficial properties, are the most widely used among metals; their consumption has become an indicator of the economic development of countries. The characteristics of iron raw materials, in relation to current metallurgical requirements, are presented in the present this article. The globalization of the trade and development of steelmaking technologies have caused significant changes in the quality of raw materials in the last half-century, forcing improvements in processing technologies. In many countries, standard concentrates (at least 60% Fe) are almost twice as rich as those processed in the mid-20th century. Methods of quality assessment have been improved and quality standards tightened. The quality requirements for the most important raw materials ‒ iron ores and concentrates, steel scrap, major alloy metals, coking coal, and coke, as well as gas and other energy media ‒ are reviewed in the present paper. Particular attention is paid to the quality testing methodology. The quality of many raw materials is evaluated multi-parametrically: both chemical and physical characteristics are important. Lower-quality parameters in raw materials equate to significantly lower prices obtained by suppliers in the market. The markets for these raw materials are diversified and governed by separate sets of newly introduced rules. Price benchmarks (e.g. for standard Australian metallurgical coal) or indices (for iron concentrates) apply. Some raw materials are quoted within the framework of the commodity market system (certain alloying components and steel scrap). The abandonment of the long-established system of multi-annual contracts has led to wide fluctuations in prices, which have reached a scale similar to that of other metals.
Wyroby stalowe i żeliwne ze względu na niską cenę i korzystne właściwości znajdują najszersze zastosowanie wśród metali w gospodarce, a ich zużycie stało się wskaźnikiem rozwoju gospodarczego. W artykule przedstawiono charakterystykę surowców żelaza w odniesieniu do obecnych wymagań hutnictwa. Globalizacja handlu i rozwój technologii wytwarzania stali w ostatnim półwieczu spowodowały istotne zmiany w jakości wsadowych surowców mineralnych. Wymusiło to usprawnienie technologii przeróbczych przez zakłady górnicze. Przedmiotem światowego handlu są obecnie standardowe koncentraty o zawartości żelaza ponad 60%, tj. niemal dwukrotnie bogatsze niż rudy przetwarzane w połowie XX wieku w wielu krajach. Udoskonalone zostały sposoby oceny jakości surowców wsadowych i zaostrzono normy jakości. W publikacji dokonano przeglądu wymagań jakościowych najbardziej istotnych surowców: rud i koncentratów żelaza, złomu stalowego, głównych metali stopowych, węgla koksowego i koksu oraz gazu i innych nośników energii. Zwrócono szczególną uwagę na metodykę badania jakości surowców oraz standaryzację surowców wsadowych. Jakość surowców oceniana jest wieloparametrycznie; istotne są zarówno cechy chemiczne, jak i fizyczne. Gorsze parametry jakościowe surowców wsadowych skutkują niższymi cenami uzyskiwanymi przez dostawców w obrocie. Rynki tych surowców są zróżnicowane, kierowane odrębnymi i częściowo nowymi regułami. W obrocie handlowym funkcjonują standardy odniesień cenowych (np. ceny węgla metalurgicznego w Australii czy indeksy cenowe koncentratów żelaza). Część surowców kwotowana jest w systemie giełdowym (niektóre składniki stopowe i złom stalowy). Rezygnacja z powszechnych dawniej kontraktów wieloletnich doprowadziła do dużych wahań cen, które osiągnęły podobną skalę jak inne metale.
Źródło:
Gospodarka Surowcami Mineralnymi; 2018, 34, 4; 25-50
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of raw materials and their suppliers as a defence against food fraud
Autorzy:
Górna, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/1930198.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
food fraud
supplier evaluation
assessment of raw materials
fałszowanie żywności
ocena dostawców
ocena surowców
Opis:
Purpose: The main purpose of this article was to present the actions taken by the food manufacturer in the field of its defence against fraud. Design/methodology/approach: Ensuring food safety requires the active participation of the enterprise on two levels, preventing accidental and intentional food contamination. In order to supervise the area related to accidental food contamination, obligatory HACCP system and voluntary quality and safety management standards are implemented in enterprises. These include ISO 22000, FSSC 22000, BRC or IFS. In turn, the area related to intentional food contamination requires action to reduce the risk of food contamination and food fraud. The adopted methodology for the evaluation of raw materials and their suppliers in the food fraud area is based on the IFS guidelines, as well as an approach developed by the author of this study, who participated in the implementation of this methodology in the company. Findings: The analyzed company is characterized by having a high cultural level of food safety and quality - actions are taken there to support its development at various levels. Among these are leadership, communication, employee involvement and risk awareness. This approach guarantees that the developed product fraud reduction plan will positively evolve in this company so as to meet and surmount changing risk factors. Originality/value: The article presents the practical application of IFS guidelines in the area of food fraud. In addition, a template for the vulnerability assessment form was designed and criteria for the assessment of control measures were specified.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2020, 143; 97-105
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Electroflotation Beneficiation of Low-Sulphide and Refractory Gold-Bearing Raw Materials
Autorzy:
Berkinbayeva, Ainur
Atanova, Olga
Kenzhaliyev, Bagdaulet
Efremova, Yuliya
Powiązania:
https://bibliotekanauki.pl/articles/2202224.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
electroflotation
gold-bearing raw material
ionization
electric potential
microbubbles
Opis:
The paper presents the results of experiments with electroflotation beneficiation of gold-bearing raw materials. Three variants of ore samples with 0.56, 1.2 and 5.9 g/t gold grades, which also have different mineralogical and phase composition, were taken as objects of study. Based on the ionization effects, as well as changes in electrostatic and electrokinetic properties of the flotation pulp components, different electrode locations in the flotation chamber were considered. Experiments have shown that for electroflotation processing of raw materials with weakly acidic and neutral medium, positive electric potential of pulp, as well as raw materials with complex mineralogical composition, the negative electrode (cathode) should be placed at the surface of foaming and concentrate assembly, and the positive electrode (anode) in the pulp flow. For electroflotation of raw materials with neutral, alkaline pH and negative electric potential of the pulp, the anode is placed at the surface of the concentrate formation and the cathode is placed in the pulp flow. Thus, additional electrolytic treatment of mineral slurry in the flotation process can increase the gold recovery in the flotation concentrate by an average of 20–30%.
Źródło:
Journal of Ecological Engineering; 2022, 23, 11; 95--100
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tel el Farcha : mineralogical investigation of stone raw materials used at the site
Autorzy:
Pawlikowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/343875.pdf
Data publikacji:
2010
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
Egipt
Tell el Farkha
mineralogia
skała
Egypt
mineralogy
rock
stone
raw materials
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2010, 10; 1-10
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 178

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