Dimethylselenide and dimethyltelluride formation by a strain of Penicillium.
R. W. Fleming,M. Alexander +1 more
TLDR
A strain of Penicillium which produced dimethylselenide from inorganic selenium compounds was isolated from raw sewage and alkylation did not appear to be a significant mechanism of selenia detoxication by this organism.Abstract:
A strain of Penicillium which produced dimethylselenide from inorganic selenium compounds was isolated from raw sewage. Sulfate and methionine enhanced growth of the fungus and its production of dimethylselenide in media containing selenite. In solutions containing selenate, methionine inhibited dimethylselenide formation while stimulating proliferation of the fungus. Dimethylselenide was also generated from inorganic selenide. Alkylation did not appear to be a significant mechanism of selenium detoxication by this organism. Dimethyltelluride was also produced by the organism from several tellurium compounds, but this product was synthesized only in the presence of both tellurium and selenium. The yields of dimethylselenide and dimethyltelluride varied with the relative concentrations of selenium and tellurium in the medium.read more
Citations
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Journal ArticleDOI
Selenium in higher plants.
TL;DR: Recent advances in the understanding of the plant's ability to metabolize Se into volatile Se forms (phytovolatilization) are discussed, along with the application of phytoremediation for the cleanup of Se contaminated environments.
Journal ArticleDOI
Microorganisms and Heavy Metal Toxicity
TL;DR: The environmental and microbiological factors that can influence heavy metal toxicity are discussed with a view to understanding the mechanisms of microbial metal tolerance.
Journal ArticleDOI
Arsenic Chemistry in Soils: An Overview of Thermodynamic Predictions and Field Observations
TL;DR: In this paper, a review of the literature on As chemical behavior in soils is presented, both theoretical and experimental, and it is suggested that As oxyanions gradually concentrate on colloid surfaces to a level high enough to precipitate a discrete or mixed As solid phase.
Journal ArticleDOI
Trends in selenium biochemistry
TL;DR: The biochemistry of selenium-containing natural products, including selenoproteins, is reviewed up to May 2002 and contains 393 references on key discoveries and recent progress.
BookDOI
Biochemistry of selenium.
TL;DR: The Selenium Deficiency Diseases in Animals and the Biological Interactions of Selenium with Other Substances are studied to help clarify the role ofSelenium in human and animal health.
References
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Sören Jensen,A Jernelöv +1 more
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Henry A. Schroeder,Henry A. Schroeder,Douglas V. Frost,Douglas V. Frost,Joseph J. Balassa,Joseph J. Balassa +5 more
TL;DR: Selenium did not accumulate in human hair with age, but increased in hair of rats fed selenate, and under some conditions, selenium is carcinogenic in rats.
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TL;DR: It seems most likely that the major urinary detoxification metabolite of selenite is trimethyl selenide, which was isolated from rat urine by ionexchange chromatography and precipitation as the reineckate salt.
Journal ArticleDOI
Histochemical demonstration of sites of choline esterase activity.
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