X-Message-Number: 1136 Date: Wed, 12 Aug 1992 17:40 MST From: Subject: Re: cryonics: #1130 - #1135 Using superfluid helium as a perfusate during cooldown won't work, because helium only becomes a superfluid (and thus frictionless) at temperatures of less than 2K or so (I can't remember the exact temperature). While this temperature may be raised by increasing the pressure, I don't think the helium phase diagram will allow superfluidity at anything near 77K for any pressure. Creative idea though! ---Mark Voelker Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=1136