The Effect of the Distribution of Sulfur on the Lethal Action of Incorporated S 35 O 4

Radioactive sulfur incorporated into Neurospora conidia inactivates the conidia with an inactivation constant of 1.0 x 10/sup -5/ in the decay relation 2.3 log N/N/sub O/ = -- alpha D. This corresponds to a radiation dose of 19,400 rads to inactivate 50% of a sample of conidia. The corresponding x-ray dose required to inactivate 50% of a conidial sample is 23,700 rads. No transmutation effect was demonstrated. (auth)