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本实验所要达到的目的是型清用小剂量率和小剂量照射时对生物影响的程度及其相关性。实验:本实验所用的剂量率和累积剂量分别为0.029Gy/天(22小时)和0.375Gy/天(22小时),共20Gy;0.084Gy/天(22小时)和0.375Gy/天(22小时),共39Gy,对C57BL/6小鼠用~(137)Cs放射源发出的ν射线进行全身照射,每组小鼠的数量为150～200只,照射时间为15～100周。结果:受放射线照射的迟发性损伤中有非特异性寿命缩短和肿瘤发生。从四周龄开始用0.375Gy/天,39Gy照射的雄性小鼠平均寿命为197天,对照组
The purpose of this experiment is to clarify the extent and relevance of biological effects on low dose rate and low dose irradiation. Experiments: The dose rates and cumulative doses used in this experiment were 0.029 Gy / day (22 hours) and 0.375 Gy / day (22 hours) for a total of 20 Gy; 0.084 Gy / day (22 hours) and 0.375 Gy / day ), A total of 39Gy, C57BL / 6 mice with 137Cs radioactive sources emitted by the ν-rays of the whole body irradiation, the number of mice per group of 150 to 200, the irradiation time of 15 to 100 weeks. Results: Delayed non-specific lifespan and tumor development were delayed by radiation-induced delayed injury. The average life span of male mice irradiated with 0.375 Gy / day and 39 Gy from the age of four weeks was 197 days. In the control group