At 12:40 AM 9/10/2000 +0100, Rex Schneider wrote: >----- Original Message ----- >From: "Jeff Kell" <[log in to unmask]> >> Small wonder they didn't prove the existence of oxygen toxicity! >> (100% O2 at 3 ATA?) > >3 bar of O2 in a dry chamber isn't a big deal, Jeff. Routine O2 treatment in >a chamber often involves breathing 100% O2 via face mask at 2.8 bar for >extended periods (with an air break around each half-hour). The reason we >limit our max ppO2 to a relatively low level when diving is the potentially >lethal consequences of an OxTox 'hit' at depth. On dry land, under >controlled conditions, it wouldn't be a problem. There is a second "oxygen clock" the pulmonary toxicity clock. It may come into effect given long term exposure to high PPO2. Causes different symptoms, is more cumulative. -- We will fight for bovine freedom, And hold our large heads high. We will run free, with the buffalo or die! Cows with Guns. - Dana Lyons, Cows With Guns Nick Simicich mailto:[log in to unmask] http://scifi.squawk.com/njs.html -- Stop by and Light Up The World!