[Combined effect of chemical and physical factors in the selection of erythromycin producers].
D000190:Actinomyces / Q000208:ethnology*; D004917:Erythromycin; D006571:Heterocyclic Compounds / Q000494:pharmacology*; D014466:Ultraviolet Rays
D006571:Heterocyclic Compounds; D004917:Erythromycin
ACTINOMYCES/culture; HETEROCYCLIC COMPOUNDS/pharmacology; ULTRAVIOLET RAYS