title: The selection, improvement, and preservation of micro-organisms.
mesh_terms: D000192:Actinomycetales; D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D000903:Antibiotics, Antineoplastic; D005658:Fungi; D011309:Preservation, Biological; D012988:Soil Microbiology
chemical_list: D000900:Anti-Bacterial Agents; D000903:Antibiotics, Antineoplastic