Results The HPRT gene mutation frequecy rose with the increase of accumulative dose and the doserate,both relationships could be described by linearquadratic models. 结果随着累积剂量和剂量率的增加,HPRT基因突变频率随之上升,其剂量效应关系符合线性平方模型。
Results The clony efficiencies of rat peripheral blood lymphocytes and spleen lymphocytes both declined with the increase of accumulative dose,while the HPRT gene mutation frequency rose. 结果外周血淋巴细胞和脾淋巴细胞的克隆效率均随内照射剂量的增加而降低,HPRT基因突变频率均随放射性核素内照射剂量的增加而增加。相同条件下,脾淋巴细胞HPRT基因突变比外周血淋巴细胞敏感。
The mean annual dose and the mean accumulated dose for the whole bodywere 0.26 rad and 3.24 rad,respectively. 平均年剂量为0.
However, under more accumulated dose, there is no error in devices in power off mode and new data can be written in these devices with programmer. 然而不加电的器件在更高的累积剂量辐照下未出现错误，而且可以用编程器重新写入数据。
There is an accumulated dose threshold.Errors occur when accumulated dose is above the threshold, no error occurs when below the threshold. 器件出现错误有个累积剂量阈值，当累积剂量小于某一值时，无数据错误。