several cytochemical techniques , such as sodium tungstate , acid hydrolysis phosphotungstic acid ( hapta ) , ethylenediaminetetraacetic acid ( edta ) , rnase-gold , and osmium-ammine , have been applied for the ultrastructural demonstration of nucleic acids on sections of tissues fixed in glutaraldehyde postfixed with osmium tetroxide and embedded in epon .
C0020291
hydrolysis
C0014241
rnase