title: Freeze-drying of chemically unfixed biological material for electron microscopy.
mesh_terms: D000818:Animals; D001001:Anura; D001792:Blood Platelets / Q000648:ultrastructure; D005612:Freeze Drying / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008854:Microscopy, Electron; D009132:Muscles / Q000648:ultrastructure