hooft at EMBL-Heidelberg.DE
Wed Apr 12 04:45:20 EST 1995
>>>>> Phillip Bigelow writes:
Phillip> Trumborm at dc37a.nci.nih.gov (Mark W. Trumbore) writes:
Mark> wolk at aludra.usc.edu (wendy wolk) wrote:
Wendy> Can anyone tell me the chemical formula for heavy water and in
Wendy> what dosage is it harmful
Mark> The formual for heavy water is D2O (D = deuterium). You have to
Mark> consume a huge amount of heavy water for it to be toxic.
Phillip> What would be the symptoms? Also, would consuming
Phillip> air/water/food that contains pure O18 (heavy oxygen) also be
The only difference between H2O and D2O is the fact that the D atoms are
2 times as heavy as the H atoms, and thus a number of processes involving
those (essential to the energy systems in the body) would run 1.4 times
slower (square root of two, "kinetic isotope effect"). I would think this
will lead to imbalance quite soon, but it could be that Mark is correct.
O18 is only 18/16 times as heavy as normal oxygen, leading to much smaller
Rob W. W. Hooft, hooft at EMBL-Heidelberg.DE, Meyerhofstr. 1, 69117 Heidelberg
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