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本文从辐射对生物整体水平的远后期效应,将这次会议上所报告的有关文章及在日本参观几个大学及研究所所做的有关研究工作归纳为以下几个问题,作一简要概述。一、辐射致癌效应1.不同性质辐射的致癌效应(1)X线:ACI 种雌性大鼠,52天日龄,全身一次照射85拉德,乳腺肿瘤发生率明显增加。其中乳腺癌和乳腺纤维瘤发生率分别为36%和39%。对照组动物则分别为4%和7%。150拉德照射,乳腺肿瘤发生率达56～90%(不同品种),恶性肿瘤占70%;对照组肿瘤发生率为8～30%。同时,实验组动物肿
In this paper, from the far-reaching effects of radiation on the overall level of biology, the relevant articles reported at the meeting and the related research work conducted in Japan to visit several universities and research institutes are summarized as the following issues. First, the radiation carcinogenic effect 1. Carcinogenic effects of different types of radiation (1) X-ray: ACI female rats, 52 days of age, the body once irradiated 85 rad, breast cancer incidence increased significantly. The incidence of breast and breast fibroids was 36% and 39%, respectively. The control animals were 4% and 7%, respectively. 150 rad irradiation, breast cancer incidence rate of 56 to 90% (different varieties), malignant tumors accounted for 70%; control group tumor incidence was 8 to 30%. At the same time, the experimental group animal swollen