I have a lady who does this wonderfully.  She cryosections 5 um under the
most pristine clean conditons,  puts slides immdiately into in a clean
RNAase free black plastic slide box sitting in dry ice until she fixes them
the same day.
Gayle Callis
MT,HT,HTL(ASCP)
Research Histopathology Supervisor
Veterinary Molecular Biology - Marsh Lab
Montana State University - Bozeman
S. 19th and Lincoln St
Bozeman MT 59717-3610

406 994-6367 (lab with voice mail)
406 994-4303 (FAX)

email: gcallis@montana.edu