(Methyl sulphoxide).(DMSO) M.W. 78.13 (CH3) Hexamethyldisilazane 2SO Protects fine structure of frozen sections cut in the (HMDS) M.W. 161.40 C6H19Nsi As an alternative to cryostat. critical point drying for biological specimens. Zagury et al. J.Histochem., 16, 40 (1968) Hexamethyldisilazane has reported advantaged of D018 500ml speed, preservation of surface detail as well as