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сілтеме мөлшері
An estimate delivered by the U. S. EPA (with uncertainty spanning perhaps an order of magnitude) of the daily exposure to the human population, (including sensitive subpopulations) that is likely to be without deleterious effects during a lifetime. The RfD is reported in units of mg of substance/kg body weight / day for oral exposures.
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Celebrated on the 1st of April each year, April Fools' Day is a time when people, and increasingly businesses, play all kinds of good humored or funny ...
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