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Me thinks that at 1/3 bar 100% (giving a PPO2 of .33 ) one would be at little
risk of pulmanary/whole body toxicity - that level is only slightly elevated
above the normoxic .21 and is beneath the .5 threshold generally accepted as
the minimum level one could hypothetically experience a problem with.

Scott

At 01:11 AM 12/12/96 -5, emdx@ac*.ne* wrote:
>
>Here, in some (few) learned talks about breathing oxygen, be it
>during hyperbaric treatment or loooong deco stops, the concept of
>"air break" is mentionned throughout.
>
>One will recall that ye olde apollo spaceships that sailed to the 
>moon many moons ago did sport a 1/3 bar 100% oxygen atmosphere for 
>the comfort and convenience of their valiant (but cramped) crews.
>
>The question is how did the guys who were cooped-up in those tin cans
>for days or weeks cope with the issue of oxygen toxicity? They
>certainly could not take air breaks, for this would have reduced the
>ppO2 below what normal lungs consider useful. 
>--
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>

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