title: The production of penicillins in soils and seeds by penicillium chrysogenum and the role of penicillin  -lactamase in the ecology of soil bacillus.
mesh_terms: D000581:Amidohydrolases / Q000096:biosynthesis* / Q000494:pharmacology; D001409:Bacillus cereus / Q000201:enzymology* / Q000254:growth & development; D002452:Cell Count; D002470:Cell Survival / Q000187:drug effects; D003470:Culture Media; D004463:Ecology; D006813:Humidity; D007769:Lactams; D010406:Penicillins / Q000096:biosynthesis*; D010407:Penicillium / Q000378:metabolism*; D010408:Penicillium chrysogenum / Q000254:growth & development / Q000378:metabolism; D012639:Seeds; D012988:Soil Microbiology; D013242:Sterilization
chemical_list: D003470:Culture Media; D007769:Lactams; D010406:Penicillins; D000581:Amidohydrolases