From owner-celegans@net.bio.net Tue Jul 06 12:18:00 1999 Path: biosci!biosci!not-for-mail From: Eugene Leitl Newsgroups: bionet.celegans Subject: worm survival during freezing Date: 6 Jul 1999 06:17:57 -0700 Organization: BIOSCI International Newsgroups for Molecular Biology Lines: 30 Sender: daemon@net.bio.net Approved: wmorgan@acs.wooster.edu Distribution: world Message-ID: <7lsvm5$rff@net.bio.net> NNTP-Posting-Host: net.bio.net Dear C. elegans researchers, I'm curious whether the standard freezing protocols, e.g. http://www.bs.jhmi.edu/MBG/SeydouxLab/Protocols/FreezeWorms.html http://www.dartmouth.edu/artsci/bio/ambros/protocols/MGH_protocols/koelle_prot/X 0006_freezing_worms.html allow quantitative retrieval of the cryopreserved worms. Can you perhaps name rough estimates as to the percentile of survival? My interests in regards to worm cryopreservation are mostly academic, however as I'm employed by a cryopreservation research company I need some hard numbers to motivate me looking into this besides of just being my hobby-horse. Is there at all interest in a much better worm freezing agent? Is there a market for it, however small? Thanks a lot in advance. Regards, Eugene Leitl 21st Century Medicine, Cryobiology division .