title: A novel selective method for the production of Bacillus subtilis var. niger spores.
mesh_terms: D001412:Bacillus subtilis / Q000254:growth & development* / Q000378:metabolism; D001431:Bacteriological Techniques; D003470:Culture Media; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D010860:Pigments, Biological / Q000096:biosynthesis; D013170:Spores / Q000254:growth & development*; D013171:Spores, Bacterial / Q000254:growth & development
chemical_list: D003470:Culture Media; D010860:Pigments, Biological