Influence of Oxygen on Radiation Effects 109 



has not been supported by Sutton (1952), who found that 

 hydrogen atoms produced by means other than irradiation 

 did not inactivate catalase, and that irradiation in presence 

 of oxygen was more damaging than in an atmosphere of 



Fig. 1. Percentage increase in oxygen uptake (= growth) of 

 Sarcina lutea during irradiation with 26 kr X-rays, in nitrogen 

 and in air ± potassium cyanide, hydroxy lamine and urethane. 



