X-Message-Number: 1500 Date: Mon, 21 Dec 92 11:51:42 PST From: (Thomas "Hank" Hogan) Subject: Re: Reaction Rate (Re: After 5,000 years of primitive cryonics) > Newsgroups: sci.cryonics,sci.med,sci.bio > References: <> Hi, I enjoyed reading your posting. I have a question: WHY DO CELL SUSPENSIONS TURN PINK IN NITROGEN (liquid)? When I freeze cell suspensions (5%DMSO, 10% serum) they usually turn pink when they get to liquid nitrogen temperature. This pink cast is quite noticeable. It reminds me of the blue toe of a glacier, but I don't think this is the same phenomenon. Any ideas? Hank [ I didn't have an answer so I figured I would ask the CryoNet folks his question (with his permission). He also suggested that maybe cell lysis had something to do with the pink color. Comments? - KQB ] Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=1500