title: Use of Bacillus subtilis in the three-hour cylinder-plate assay for penicillin.
mesh_terms: D000818:Animals; D001412:Bacillus subtilis; D001681:Biological Assay; D010406:Penicillins / Q000032:analysis*
chemical_list: D010406:Penicillins
keywords: PENICILLIN/assay