Usefulness of a sapphire knife in ultrathin sectioning of biological specimens.
D000818:Animals; D007687:Kidney Tubules, Proximal / Q000648:ultrastructure; D008138:Loop of Henle / Q000648:ultrastructure; D051379:Mice; D008854:Microscopy, Electron; D008867:Microtomy / Q000295:instrumentation*