X-Message-Number: 3618
Newsgroups: sci.cryonics
From:  (Robert D Grahame)
Subject: Re: Superconductors and the Peltier effect.
References:  <3eab3e$>
Date: Wed, 4 Jan 1995 22:14:27 +0000
Message-ID: <>

In article <3eab3e$>  writes:
>     If the so called experts on this net read more recent information they
>would not be so quick to jump to conclusions.

I'm not an expert, but the difficulty I had with understanding your proposal
is this :- However cold you can make something, and however efficiently you
can do it, you still have to chill a few pounds of water from room
temperature to minus whatever in a *very* small period of time. Cooling
particles with lasers is OK when you can hit the particle with a laser. Under
several centimeters of brain tissue this is not an option. Even embedding
superconducting peltier devices capable of maintaining close to 0K measuring
just a few mm across inside every blood vessel large enough to take on
wouldn't be fast enough.

I've got no problem with understanding (at least in principle) the technology
you are proposing, but I can't (yet) see how you propose to apply it to
cryopreservation of large samples of tissue. Have I missed something?

Regards,

-- Bob Grahame, Streatham, London. LAN Consultant
-- Voice : +(44)71 406 7795 : PGP Key available
-- Towel : 0d8'22"W51d24'16"N+29M

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