title: Capsular material and morphology of some ampicillin sensitive and resistant strains of Escherichia coli K12.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology*; D002845:Chromatography; D002850:Chromatography, Gel; D004926:Escherichia coli / Q000166:cytology* / Q000302:isolation & purification*; D008722:Methods; D008854:Microscopy, Electron; D010403:Penicillin Resistance
chemical_list: D000667:Ampicillin