Gentlemen, On this counterdiffusion issue; You cannot inflate a bubble against surface tension by passive diffusion alone - the energy required is simply not there. The phenomenon of bubble formation attributed to counterdiffusion as a result of switching gasses under isobaric conditions is probably a case of changing the solubility of one or more gasses in a local area of tissue as a result of local temperature changes (skin) or the introduction of other solutes (as in salting out). Chuck Boone -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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