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Abstract


In oder to investigate the effects of cobalt-60 gamma ray irradiation on the body gains of rabbits aging approximately 50-day-old rabbits were subjected to single whole-body gamma irradiation externally. The results obtained were as follows:
1. There were significant differences of the body gains between control and treated groups except the 100 rads gamma-rays exposure group.
2. There were no differences in body gains between male and female rabbits.
3. Generally, the relation between gamma irradiated doses and the growth rates of rabbits were inversely proportional.
4. The LD_(50) of the rabbits was 600 rads in case of single external whole-body gamma irradiation.

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