FW: High Oxygen -Reply

[grenard@herpmed.com]

---------------Original Message---------------
Steve Grenard::
Could you put this response into the list from which the original artile
came? I would appreciate your help.

Best wishes
Paul
Rich Hengst
Mesozoic Physiologist

Two Comments re Mesozoic FIO2;

1.Analysis of bubble gas in amber or likey anything else may not take into
account the relativr diffusability of the atmospheric gases.  ie: CO2 and
Nitrogen are more difussable than O2. So it is likely that as the resins
which make up amber were solidifying N2 and O2 diffused through the still
maliable and perminable material at a faster rate than O2. This would lead
to increased FIO2 in the bubbles.

2. On the other hand high environmantal FIO2 could suggest increased levels
of oxygen radicals - with a the attending problems of thses free radicals
on organ physiology and genetic structure. Sooo maybe it was not the
cigarret smoking (as Gary Larson suggests) that killed the diosaurer but to
much O2.

Paul Mathews EdS, RRT, FCCM
Associate Professor
University of Kansas Medical Center
913-588-4603 (v)
913-588-4630 (f)
pmathews@kumc.edu (e)

----------End of Original Message----------

-------------------------------------
Steve Grenard
E-mail: grenard@herpmed.com
http://www.herpmed.com/
POB 40825 - Staten Island NY 10304-0825 USA
Telephone/Fax/Messages: 1-718-4476144


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