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Rich,

The article by Hamilton, et al, was presented at the EUBS meeting in
1985 (I think the year is right).  They found no significant difference
at depth between air and nitrox mixtures.

They stated that oxgyen, based on it's lipid solubility, should be twice
as narcotic as nitrogen, but in the study they found it to be roughly
equi-potent.  Hypothesis was that since oxygen was metabolically active,
that some was metabolized, thus reducing the dissolved partial pressures
seen at the active site (wherever the hell that is, who every figures
that out will get the Nobel prize in medicine).

John
(johncrea@de*.co*)

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