Abstract
Summary
1. A prolongation of the lag phase in irradiated E. coli is described. The modifying effects of temperature during growth, storage of irradiated organisms, and the addition of mouse blood, inactivated rabbit serum, 0.5% cysteine solution, the nitrate of actively growing E. coli cultures, fresh spleen, liver and kidney mash, or growing non-irradiated E. coli cultures, have been studied. 2. Evidence that sublethal effects of X irradiation in bacteria differ from lethal effects is discussed.
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