Results 211 to 220 of about 42,900 (252)
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Selenium metabolism in a strain ofFusarium
Biological Trace Element Research, 1988Fusarium sp. was isolated from Sinai soil at Egypt. It showed tendency to tolerate high concentrations of selenium in the form of sodium selenite up to 3.5% (w/v). The microscopic examination revealed some morphological distortions. However, the fungus was capable to circumvent the toxic effect of selenium. The fungus possess strong reducing ability as
S E, Ramadan +3 more
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Selenium metabolism in Escherichia coli
Biometals, 1998Escherichia coli will reduce selenite (SeO3(2-)) and selenate (SeO4(2-)) to elemental selenium Se0. Selenium will also become incorporated into proteins as part of the amino acids selenocysteine or selenomethionine. The reaction of selenite with glutathione produces selenodiglutathione (GS-Se-GS).
R J, Turner, J H, Weiner, D E, Taylor
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Clinical aspects of selenium metabolism
Biological Trace Element Research, 1988Whereas defined selenium deficiency diseases are well characterized in animals, analogous syndromes in humans are unknown or occur only rarely under conditions of extreme selenium depletion. However, selenium deficiency has since been recognized to play important secondary roles in a variety of human diseases, and several of these can be prevented or ...
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Arsenic and Selenium in Microbial Metabolism
Annual Review of Microbiology, 2006Arsenic and selenium are readily metabolized by prokaryotes, participating in a full range of metabolic functions including assimilation, methylation, detoxification, and anaerobic respiration. Arsenic speciation and mobility is affected by microbes through oxidation/reduction reactions as part of resistance and respiratory processes. A robust arsenic
John F, Stolz +3 more
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Selenium Metabolism in Micro-organisms
1993Publisher Summary Selenium is one of the youngest elements detected to have a biological function. The form used in biological macromolecules (proteins, tRNAs), however, is the -2 oxidation state. Nature has used the chemical property of the selenol group to incorporate it into the active site of oxidoreductases.
J, Heider, A, Böck
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1983
Selenium is absorbed from the gastrointestinal tract to various extents, and the distribution within the body varies with the species and with the chemical form and the amount of the element ingested.
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Selenium is absorbed from the gastrointestinal tract to various extents, and the distribution within the body varies with the species and with the chemical form and the amount of the element ingested.
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Effects of Cyanide on Selenium Metabolism in Rats
The Journal of Nutrition, 1984Adult male rats were given drinking water containing either 0 or 150 ppm cyanide for 2 weeks. They were then injected with 5 microCi 75Se-selenite, and excretion of radioactivity in urine and feces was determined. No difference in excretion of 75Se occurred during the rapid phase, but the cyanide-treated rats (T1/2 28 days) excreted significantly more ...
M A, Beilstein, P D, Whanger
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2010
Selenium (Se) is an essential nutrient for many organisms, but also toxic at higher levels. While certain algae require Se to make selenoproteins, no such requirement has been shown for higher plants. Still, plants readily take up and assimilate Se using sulfur (S) transporters and biochemical pathways, and can also volatilize methylated Se.
Elizabeth A. H. Pilon-Smits +1 more
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Selenium (Se) is an essential nutrient for many organisms, but also toxic at higher levels. While certain algae require Se to make selenoproteins, no such requirement has been shown for higher plants. Still, plants readily take up and assimilate Se using sulfur (S) transporters and biochemical pathways, and can also volatilize methylated Se.
Elizabeth A. H. Pilon-Smits +1 more
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Metabolic Aspects of Selenium Action and Toxicity
CRC Critical Reviews in Toxicology, 1976The nutritional observations, on which the activity of selenium is based, are briefly reviewed, and the interactions of the trace element with vitamin E, polyunsaturated fatty acids, and sulfur amino acids at the dietary level highlighted. Brief mention is made of early morphological effects of vitamin E and selenium deficiency and of “classical ...
Anthony T. Diplock, William G. Hoekstra
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Metabolism of inorganic selenium in rumen bacteria
Canadian Journal of Physiology and Pharmacology, 1968In vitro and in vivo experiments demonstrated that rumen bacteria were capable of metabolizing inorganic 75Se and incorporating the element into the microbial protein. The fixation of 75Se into bacteria in vitro was inversely proportional to the previous dietary intake of selenium by the host sheep.
M, Hidiroglou, D P, Heaney, K J, Jenkins
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