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1 INTRODUCTION
Pages 1-2

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From page 1...
... It is also used to decolorize the greenish tint of glass due to iron impurities or, in excess, to create the ruby-red color seen in warning signals and automobile tail lights. These and other uses are met by production of approximately 266 metric tons of selenium annually in the United States and worldwide production of 1,559 metric tons (Anonymous, 1979a, 1979b)
From page 2...
... Interestingly, Alvin Moxon, as a graduate student at South Dakota State University in the early 1930s, documented a growth response in chicks fed low levels of selenium in a series of studies designed to explore the toxicity of selenium at graded levels (Oldfield, 1981~. When workers in William Hoekstra's laboratory at the University of Wisconsin (Rotruck et al., 1973)


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