Selenite mostly formed in shallow marginal settings and was redeposited into a small remnant basin with a depocentre near the present synclinal axis. |
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There are no or very little measurable amounts of selenium occurring as selenite in these accumulator plants. |
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Eventually, basin shallowing allowed in situ precipitation of selenite in shallow lagoons and ponds near the basin depocentre. |
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The organic form of selenium has been found to be more effective than sodium selenite for reproducing animals. |
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The minerals are deposited in lakes, deltas and meander further downstream, where they build up and form sedimentary rocks such as calcite, selenite, pyrite and dolomite. |
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The results clearly showed that selenium, as sodium selenite, not only reduced the morbidity and mortality of Keshan disease, but also reduced cardiac damage. |
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Specifically, sodium selenite is often unsafe at levels exceeding 600 micrograms, whereas selenium from yeast, L-selenomethionine and sodium selenate are generally much safer. |
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Selenium can be taken up by plant roots as selenate, selenite or as organoselenium compounds such as the amino acids selenocysteine and selenomethionine. |
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