title: Method for obtaining free bacterial spores of Bacillus subtilis var. niger.
mesh_terms: D001412:Bacillus subtilis; D001431:Bacteriological Techniques; D002473:Cell Wall / Q000187:drug effects; D008722:Methods; D009113:Muramidase / Q000494:pharmacology; D013170:Spores / Q000187:drug effects / Q000302:isolation & purification*
chemical_list: D009113:Muramidase