title: ROLE OF COBALT IN NITROGEN FIXATION BY AZOTOBACTER CHROCOCCUM.
mesh_terms: D001395:Azotobacter; D003035:Cobalt; D045728:Corrinoids; D003470:Culture Media; D008982:Molybdenum; D009586:Nitrogen Fixation; D012106:Research; D014805:Vitamin B 12
chemical_list: D045728:Corrinoids; D003470:Culture Media; D003035:Cobalt; D008982:Molybdenum; D014805:Vitamin B 12
keywords: AZOTOBACTER; COBALT; CULTURE MEDIA; EXPERIMENTAL LAB STUDY; MOLYBDENUM; NITROGEN FIXATION; VITAMIN B 12