X-Message-Number: 1405 Newsgroups: sci.cryonics,sci.med,sci.bio From: (David Heisterberg) Subject: Re: After 5,000 years of primitive cryonics Message-ID: <> References: <> Date: Mon, 7 Dec 1992 16:45:48 GMT In article <> (Nick Szabo) writes: >Can we learn anything about long-term organ storage or cryonics >from the "ice man" who was freeze-dried at -10C for 5,000 years? > >* Does his chemical degradation match the rule of > "factor of two in temperature means factor of ten > in rate of decay"? Isn't decay a more complex > function of mobilized enzymes and parasites? There is a rule of thumb in chemistry that, for every 10C drop in temperature, the rate of reaction is halved. Is that what you're referring to? A "factor of two" in temperature doesn't mean any- thing unless you're using an absolute scale. And in this case we're talking about 263K vs. say, 300K, so we aren't anywhere near a factor of two. -- David J. Heisterberg () What men value is not rights The Ohio Supercomputer Center but privileges. Columbus, Ohio -- H.L. Mencken [ Message #0015 "How Cold Is Cold Enough" by Hugh Hixon explains the Arrhenius equation for reaction rate as a function of temperature. The article also includes numerical results over a wide range of temperatures. - KQB ] Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=1405