Results 11 to 20 of about 255,270 (305)
Chemical Fractionation in Environmental Studies of Potentially Toxic Particulate-Bound Elements in Urban Air: A Critical Review [PDF]
Toxics, 2022 In recent years, studies of heavy metal air pollution have increasingly gone beyond determining total concentrations of individual toxic metals. Chemical fractionation of potentially toxic elements in airborne particles is becoming an important part of ...
Ryszard Świetlik, Marzena Trojanowska
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New Green Determination of Cu, Fe, Mn, and Zn in Beetroot Juices along with Their Chemical Fractionation by Solid-Phase Extraction [PDF]
Molecules, 2019 A new simple and rapid method for the determination of the total concentrations of Cu, Fe, Mn, and Zn in beetroot juices by flame atomic absorption spectrometry was developed and validated.
Pawel Pohl +5 more
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BIOMASS CORROSIVENESS PREDICTION BY CHEMICAL FRACTIONATION [PDF]
Proceedings on Engineering SciencesThe use of biomass as fuel is growing rapidly due to its advantages of CO2 neutrality and renewability. However, low-quality fuels can include considerable concentrations of ash-forming elements that negatively affect boiler operation.
MªLuisa Contreras +2 more
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Towards low energy greywater treatment of surfactants and pathogens [PDF]
Discover WaterGreywater reuse in households and off-grid applications is growing in response to water scarcity. Effective treatment technologies must balance water quality, efficiency, and low energy or chemical inputs. This study presents a low-energy, non-biological
Zachary Bogart +5 more
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Nitrogen isotopes in the interstellar medium: A chemical journey across the Galaxy [PDF]
EPJ Web of Conferences, 2022 One of the most important tools to investigate the chemical history of our Galaxy and our own Solar System is to measure the isotopic fractionation of chemical elements. This is the process that distributes the less abundant stable isotopes of an element
Colzi Laura +3 more
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Modification of the NH2 column method for chromium speciation in surface water and soil water [PDF]
Bulletin of the Geological Society of Finland, 2008 A new application of the NH2 column method has been tested for speciation of Cr(VI) in soil water and surface water. Soil water and surface water samples were collected from two sites near the world’s largest stainless steel production plant, Outokumpu ...
A. Koivuhuhta +3 more
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THE CHEMICAL FRACTIONATION OF LYMPHATIC ORGANS [PDF]
The Journal of Cell Biology, 1956 A method for chemically fractionating lymphatic organs has been described. The method has been shown to be applicable to bovine palatine tonsils, sheep palatine tonsils, and bovine thymus. Approximately 50 per cent of the dry weight of tonsils and about 30 per cent of thymus has been found to be soluble in the 0.15 M NaCl extract.
E L, HESS, S E, LAGG
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Using hydrocyclone fractionation to improve chemical pulp quality
South African Journal of Chemical Engineering, 2021 Production of chemical pulp is accompanied by various impurities in addition to the cellulose fibres produced. The impurities are mainly due to lignin fragments and wood resin components in the wood.
Marvin Potgieter +3 more
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Main Group Metal Chemistry, 2020 In current study, the effect of various organic substances as bulking agents (BAs) including wheat straw, pistachio hull wastes, and tree leaves at different levels (10, 25, 45% v/v) were investigated on total concentration and chemical forms of Cu, Pb ...
Saffari Mahboub +3 more
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Revista Ambiente & Água, 2022 This study quantified the C content of the chemical and physical fractions of SOM in different management systems in an Argisoil of sandy texture. The study was carried out in a reference area of Native Forest (NF), and in three managed areas: Permanent ...
Giovana Tetsuya Lopes +7 more
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