Results 161 to 170 of about 305,561 (212)
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Memrane extraction in analytical chemistry
Journal of Separation Science, 2001In this paper the principles and application of porous and non-porous membrane extraction techniques for sample preparation (pretreatment) in analytical chemistry are reviewed, with emphasis on aqueous samples of biological, environmental, or food origin.
Jan Åke Jönsson, Lennart Mathiasson
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Cannabis: Chemistry, extraction and therapeutic applications
Chemosphere, 2022Cannabis, a genus of perennial indigenous plants is well known for its recreational and medicinal activities. Cannabis and its derivatives have potential therapeutic activities to treat epilepsy, anxiety, depression, tumors, cancer, Alzheimer's disease, Parkinson's disease, to name a few.
Falguni Pattnaik +6 more
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Extraction and chemistry of annatto
Food Chemistry, 1980Abstract Annatto extracts contained in the pericarp of the fruit Bixa orellana are extracted by several methods. Commercial preparations consist of solutions or suspensions of the pigment in vegetable oil or as a water-soluble form in dilute alkaline solution.
H.D. Preston, M.D. Rickard
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Chemistry of Extraction by Sulphoxides
Russian Chemical Reviews, 1976The present state of the chemistry of extraction equilibria involving sulphoxides of diverse structure — aliphatic, cyclic, and also mixtures of petroleum origin — is discussed, and results are given for the extraction of inorganic and organic acids and metal salts from aqueous solution.
Yu E Nikitin +2 more
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Extraction Techniques in Green Analytical Chemistry
2023Analytical chemistry determinations are not exempted from generating environmental contamination. A variety of strategies are now being proposed to reduce the impact on the environment caused by the different stages of the analytical process. These strategies can focus on the different stages of the analysis, ranging from sample collection and ...
Pighín, Andrés Fabián +5 more
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The Chemistry of Pollen-Extracts
The Journal of Immunology, 1943Abstract Cooke and Stull (1, 2) employed phosphotungstic acid in hydrochloric acid for the standardization of pollen-extracts, and established a protein-nitrogen unit which was taken as equal to 0.00001 mg of nitrogen per ml of extract.
Ethan Allan Brown, Norbert Benotti
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Extraction and chemistry of cochineal
Food Chemistry, 1980Abstract The study of ‘cochineal’ for use in food involves a wide range of unexpected disciplines. The importance of the historical, geographical and entomological backgrounds is emphasised. The chemistry of carminic acid and related hydroxyanthraquinones is shown to have been confused by the early work of Liebermann & Voswinckel (1897), but evidence
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Computational Chemistry in Solvent Extraction
ChemInform, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Kazuya Uezu, Kazuharu Yoshizuka
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Scandium – Leaching and Extraction Chemistry
2021Scandium (Sc) is one of the key elements in the green economy due to its use in fuel cells and as alloying metal for aluminium, but the scandium market is not working in the sense that very little is offered at a high price making it impossible to gain use of the metal.
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Chemistry and microbiology in sugar extraction
Sugar Industry, 2021The stability of the sucrose molecule and the firmness of the tissue structure in the cossettes are of major concern when optimizing the operating conditions for the extraction system. For a given extraction system the retention time is more or less fixed, but the actual pH values and temperatures to be set across the system largely determine the ...
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