Results 241 to 250 of about 1,678,709 (293)
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Toxicology of Selenium and Tellurium and Their Compounds
Archives of Environmental Health: An International Journal, 1961A comprehensive survey of the toxicological properties of selenium and tellurium and their compounds is presented. Although selenium has been used commercially for many years with no long-term systemic effects on industrial workers, selenium has long been regarded as a toxic substance.
E A, CERWENKA, W C, COOPER
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Mutagenic activity of selenium compounds
Mutation Research/Genetic Toxicology, 1979The mutagenicities of selenate (SeO2/4-) and selenite (SeO2/3-) were determined by two bacterial assay systems: Kada's rec-assay and Ames's Salmonella test. In both assays, these compounds were found to be weak mutagens. In the Salmonella test, selenate (0.05 revertants/nmole) and selenite (0.2 revertants/nmole) gave rise to base-pair substitution.
M, Noda, T, Takano, H, Sakurai
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Methods of Selenium Supplementation: Bioavailability and Determination of Selenium Compounds
Critical Reviews in Food Science and Nutrition, 2014Selenium, a "dual-surface" element, maintains a very thin line between a level of necessity and harmfulness. Because of this, a deficiency or excess of this element in an organism is dangerous and causes health-related problems, both physically and mentally.
Malgorzata, Bodnar +3 more
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Selenium Oxoanion Compounds of Palladium(II)
Inorganic Chemistry, 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.
Jie, Ling, Thomas E, Albrecht-Schmitt
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Contributions to the chemistry of selenium and selenium compounds—V the hydrolysis of selenium
Journal of Inorganic and Nuclear Chemistry, 1960Abstract The reactions of selenium with water, with alkali hydroxides and with ammonium hydroxides were investigated. The reactions of selenium with alkali hydroxides and ammonium hydroxide afford colloidal selenium solutions. The experimental evidence was supported by theoretical considerations, on the basis of redox potentials.
E. Schulek, E. Körös
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Selenium and Selenium Compounds
2000The article contains sections titled: 1. Introduction 2. Properties 3. Occurrence and Raw Materials 4. Production 4.1. Primary Production 4.2. Secondary Production 4.3. Refining 5. Environmental Protection 6. Uses 7. Quality Specifications and Analysis 8. Selenium Compounds 9. Economic Aspects 10.
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FATES OF ADMINISTERED SELENIUM COMPOUNDS
Nutrition Reviews, 2009The selenium analogues of the sulfur-containing amino acids are important tools for tracing the course of selenium from ingested food to functional proteins in the animal.
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Selenium Compounds and Selenoproteins in Cancer
Chemistry & Biodiversity, 2008AbstractAn adequate selenium (Se) status has for long been considered to prevent the development of various forms of cancer. However, underlying molecular mechanisms remained unknown. In mammals, selenium exerts its functions as selenocysteine incorporated into selenoproteins.
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Australian Journal of Chemistry, 1969
The characterization of various mixtures obtained by fractional recrystallization of sulphur-selenium melts is described. Optical absorption spectra of thin films, mass spectra, and X-ray diffraction data reveal two distinct ranges of homogeneity, the break occurring at 14 at. % Se.
CR Ailwood, PE Fielding
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The characterization of various mixtures obtained by fractional recrystallization of sulphur-selenium melts is described. Optical absorption spectra of thin films, mass spectra, and X-ray diffraction data reveal two distinct ranges of homogeneity, the break occurring at 14 at. % Se.
CR Ailwood, PE Fielding
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Gas-chromatographic determination of selenium as an organo-selenium compound with acetophenone
Talanta, 1974A gas-chromatographic method with electron-capture detection is presented for the determination of selenium after reaction with acetophenone to obtain an organo-selenium compound. This compound is extracted into benzene and chromatographed on an alumina column. The relative standard deviation for the average value (5 mug) is +/-6% (n = 8, P = 95%). The
N, Jordanov, K, Dakalova, N, Rizob
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