PHOTOREACTIVATION OF ULTRAVIOLET-IRRADIATED ESCHERICHIA COLI, WITH SPECIAL REFERENCE TO THE DOSE-REDUCTION PRINCIPLE AND TO ULTRAVIOLET-INDUCED MUTATION.

PHOTOREACTIVATION OF ULTRAVIOLET-IRRADIATED ESCHERICHIA COLI, WITH SPECIAL REFERENCE TO THE DOSE-REDUCTION PRINCIPLE AND TO ULTRAVIOLET-INDUCED MUTATION.