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自从1817年Berzelius发现硒元素以来,人们逐步认识到硒对生物体的毒性作用及其营养作用。本世纪四十年代Seifter和Enrich及Nelson等做了硒与肿瘤的研究,认为硒可能诱发大鼠肝脏及甲状腺肿瘤。然而,经
Since Berzelius discovered selenium in 1817, people have come to realize the toxic effect of selenium on the organism and its nutrition. Seifter and Enrich and Nelson in the 1940s made researches on selenium and tumor. They think that selenium may induce rat liver and thyroid tumors. However,