摘要
在控制试验环境温度、湿度和噪声的条件下,24只Wistar大鼠随机分组后给与0.0、0.5和5.0mW·cm^(-2)2450MHz,CW微波辐照1h/d×10d。停照后即刻红外热图显示,体表温度随功率密度的增大而递次升高,呈剂量—效应关系。5.0mW·cm^(-2)组体表温度显著升高(P<0.01),肛温升高0.9℃(P<0.05),但能量代谢明显低于对照组和自身基础值(P<0.05)。≤1.0mW·cm^(-2)剂量时,体表温度有一定升高(P<0.05),而肛温仅有0.2℃的波动(P>0.05),能量代谢变化不明显(P>0.05)。据此可知,5.0mW·cm^(-2)剂量热效应是微波作用而非内源性产热所致,属于致热剂量,≤1.0mW·cm^(-2)则不致于产生明显热作用。此外,红外热图表明,生物体对微波具有时间适应性和部位敏感性。相对而言。睾九部位最为敏感。
The studies were carried out in the anechoic chamber where temperat-
ure, relative humidity and noise were effectively controlled. 24 wistar rats
were divided randomly into 0, 0.5, 1.0, 5.0mW. cm^(-2): groups. Rats were
exposed to 2450 MHz CW microwave for 1h/d×10d. The results showed that
increased skin temeprature of rats depends on microwave power. This means
that there is a relation between dose and effect. In 5 mW. cm^(-2) dose
group, the skin temperature (ST) was increased significantly (P≤0.01),
the rectal temperature (RT) was increased 0.9℃(P≤0.05) while the
energy metabolism (EM) was decreased (P≤0.05). In≤1.0mW. cm^(-2) groups,
there was a significant increase in ST (P≤0.05), but RT was only changed
less than 0.2℃ and EM showed no significant change (P>0.05). These data
suggested that the heat effect is caused by microwave effect but not EM.
It confirmed that 5 mW.cm^(-2) microwave power has the heating effect, but
there is no heating effect in≤1mW.cm^(-2) power. In addition, changes of
thermogram showed that there are adaptability and sensitive region in rats
for microwave irradiation. Testicle region was more susceptible than other
regions.
出处
《解放军预防医学杂志》
CAS
北大核心
1992年第3期178-183,共6页
Journal of Preventive Medicine of Chinese People's Liberation Army
关键词
微波
红外热图
剂量效应
能量代谢
Microwave
Infra-thermogram
Energy metabolism
Rectal Temprature
