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本文以频率为3 GHz脉冲微波、功率密度为1和0.1mW/cm~2(SAR=0.32～0.2和0.032～0.02mW/g,大鼠),0.5和0.05mW/cm~2(SAR=0.6～0.45和0.06～0.045mW/g,小鼠)于微波暗室内对动物进行辐照,并设大鼠和小鼠两个假辐射组,每天5小时,每周6天,共11个月。结果发现:辐射组大鼠胸腺重量较轻、实质组织减少及胸腺细胞数减少,嗜中性粒细胞吞噬活性下降,血细胞凝集素效价(HAT)反应低落;但0.05mW/cm~2辐射组小鼠周血的淋巴细胞绝对值及HAT反应均较假辐射组为高。实验表明,低强度微波长期辐射,对机体免疫功能具有“亚临床损伤”的累积效应。强度较高时,免疫抑制反应较早出现;强度较低时,免疫抑制反应较迟出现,甚或仍呈免疫增强反应。
In this paper, pulse microwaves with a frequency of 3 GHz, power densities of 1 and 0.1 mW / cm 2 (SAR = 0.32-0.2 and 0.032-0.02 mW / g in rats), 0.5 and 0.05 mW / cm 2 (SAR = 0.6 ~ 0.45 and 0.06 ~ 0.045 mW / g, mice) irradiated the animals in a dark microwave chamber. Rats and mice were given two sham radiation groups, 5 hours a day and 6 days a week for 11 months. The results showed that the thymus weight, the decrease of parenchyma and the number of thymus, the decrease of neutrophil phagocytosis and the decrease of hemagglutinin titer (HAT) response were observed in the radiation group. However, in the 0.05mW / cm ~ 2 radiation group The absolute value of lymphocytes and the HAT response in the mice blood were higher than those in the sham radiation group. Experiments show that long-term low-intensity microwave radiation, the immune function of the body has a “subclinical injury” cumulative effect. When the intensity is high, the immunosuppression reaction appears earlier; when the intensity is lower, the immunosuppression reaction appears later, or even the immune enhancement reaction.