title: [Analysis of the mechanism of the fixation of membrane structures using osmium tetroxide. II. An electron microscopic and x-ray structural study of myelin frozen and lyophilized at low temperature].
abstract: Comparative electron microscope and X-ray studies were made on the frog sciatic nerve myelin after freeze-drying technique. The specimens were fixed with OsO4 before and after freeze-drying. In the latter case, osmium was used as a hydrophobic solution (OsO4 in CCl4), or in the high vacuum during osmium sublimation. The results obtained in this study do not fit in the accepted mechanism operating during osmium fixation of membranes. Another mechanism is proposed by the authors, and the problem of osmium localization within the space of the myelin repeated unit is discussed.
mesh_terms: D000818:Animals; D001001:Anura; D003584:Cytological Techniques; D005404:Fixatives; D005612:Freeze Drying; D008854:Microscopy, Electron / Q000379:methods; D009186:Myelin Sheath / Q000648:ultrastructure*; D009992:Osmium / Q000494:pharmacology*; D009993:Osmium Tetroxide / Q000494:pharmacology*; D011896:Rana temporaria; D012584:Sciatic Nerve / Q000648:ultrastructure; D014618:Vacuum; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D005404:Fixatives; D009992:Osmium; D009993:Osmium Tetroxide
vernacular_title: Analiz mekhanizma fiksatsii membrannykh struktur chetyrekhokis'iu osmiia. II. Elektronnomikroskopicheskoe i rentgenostrukturnoe issledovanie zamorozhennogo i liofilizirovannogo pri nizkoĭ temperature mielina.