Abstract
SELENIUM compounds are usually considered harmful, but evidence is mounting that the element may have other biological effects. The fact that a few higher plants can accumulate relatively large amounts of selenium has been known since the 1930's; several species of Astragalus (vetch) have actually been proved to require traces of selenium for normal development1. More recently, animals deficient in vitamin E as well as grazing animals suffering from white muscle disease were found to improve after treatment with selenium in quantities 0.1–0.01 less than the usual toxic amounts2,3. It has been suggested that selenium at these concentrations may well be an essential element for animals3.
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SHRIFT, A., KELLY, E. Adaptation of Escherichia colito Selenate. Nature 195, 732–733 (1962). https://doi.org/10.1038/195732a0
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DOI: https://doi.org/10.1038/195732a0
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