X-Message-Number: 13106
From: Thomas Donaldson <>
Subject: about sugars in cryonic suspension & cryobiology
Date: Tue, 18 Jan 100 23:16:26 +1100 (EST)

Hi everyone!

Some messages for this Cryonet dont really seem to me worth the reply,
but the issue of sugars as cryoprotectants does deserve discussion.

First of all, no sugar so far known has helped with suspension down to
temperatures close to or below that of liquid nitrogen. I WAS interested
though to find that the research supported by the Life Extension
Foundation in means to suspend organs DID use sugar-based cryoprotectants
in the early stages of organ suspension. (Just because they wont take
you down to LN does not imply that their use is worthless).

I have no idea what use of sugars would do to someone who was diabetic.
The idea of using them, and their general use, is to protect the OUTSIDE
of cells down to temperatures as low as (say) about -45 C. There use
isnt to get involved with cell metabolism (which will have effectively
ceased at such temperatures) but to use the their antifreeze character.

			Best and long long life to all,

				Thomas Donaldson

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