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trace element |
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trace element any of various chemical elements, such as iron, manganese, zinc, copper, and iodine, that occur in very small amounts in organisms and are essential for many physiological and biochemical processes |
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| The geochemical behavior of trace elements in all wines suggests that a common mechanism, the effect of climate on trace element solubility, affects trace-element concentration patterns. Although some scientists hold that the entire mantle gradually mixes, others suspect that the mantle's deeper rock--and the trace elements it contains--typically doesn't get too close to Earth's crust, says geophysicist David Bercovici of Yale University. These glasses show promise for use as secondary standards for minor and trace element analyses of insulating materials such as synthetic ceramics, minerals, and silicate glasses. |
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