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为了探讨寒冷条件下机体对电离辐射的生物学效应，Ｗｉｓｔａｒ大鼠在１～５℃低温下冷适应１４天，照射４．５Ｇｙ，再移至常温饲养，为寒冷照射组，引流大鼠眼内眦动脉血作ＷＢＣ、ＬＹａ、ＬＹＰ、ＲＢＣ、ＰＬＴ、Ｈｂ等８项外周血指标和微核率测定，并以常温组、常温照射组、寒冷组作对照。结果表明，常温组、寒冷组各项指标均在正常范围。与常温照射组相比，ＷＢＣ、ＬＹａ、ＲＢＣ、ＰＬＴ、Ｈｂ下降数值小，回升速度快。照后第２８天寒冷照射组比常温照射组ＷＢＣ升高１倍左右，微核率也比较低。提示寒冷适应使机体增强了对电离辐射的抗性
In order to investigate the biological effects of ionizing radiation on the body under cold conditions, Wistar rats were acclimated for 14 days at low temperature of 1 ~ 5 ℃, irradiated 4.5Gy, and then reared at normal temperature for cold irradiation group, The blood samples of peripheral blood such as WBC, LYa, LYP, RBC, PLT and Hb were measured in peripheral blood and micronucleus rate in the group of internal carotid artery. The normal group, normal group and cold group were used as controls. The results showed that the normal temperature group, the cold group indicators are in the normal range. Compared with normal temperature irradiation group, WBC, LYa, RBC, PLT, Hb decline in small values, the rapid recovery. On the 28th day after irradiation, the WBC in the cold irradiation group was about 1 times higher than that in the normal temperature irradiation group, and the micronucleus rate was also lower. Tip cold adapted to enhance the body’s resistance to ionizing radiation