Therolesofseleniuminthebiosphere,bothbeneficialanddeleterious,aregraduallybeingdetermined.Manymicroorganismsareknowntobeabletouseselenium(e.g.,selenite,selenateorotherforms)intheirmetabolism.Asformicroalgae,seleniumhasbeenshowntobeanessentialelementforthe (共 15166 字) [阅读本文] >>