title: Relation between coherence of electron beam and contrast of electron image of biological substance.
mesh_terms: D000818:Animals; D001419:Bacteria / Q000166:cytology; D004926:Escherichia coli / Q000166:cytology; D008854:Microscopy, Electron; D008857:Microscopy, Interference; D008867:Microtomy; D011511:Proteus / Q000166:cytology; D012160:Retina / Q000166:cytology; D013210:Staphylococcus / Q000166:cytology; D014027:Tobacco Mosaic Virus