排序方式: 共有3条查询结果,搜索用时 0 毫秒
1
1.
This paper oescrloes animal experiments carried out in an uranium mine gallery for the purpose of investigating the relationship between animals' exposure to radon and its daughters and the incidence of chronic health hazards.100 white rats and 400 C-57 black rats were placed in the atmosphere with high level radon and its daughters in an uranium mine to unde~o experiments of radon I nhalation.Their accumulated exposure doses were 2500 and 1170 WLM respectively After a continued observation over a period of one year and nine months,no remarkable increment of lung cancer incidence due to radon and its daughters was noted in the animals. 相似文献
2.
微量元素锌、铜、铁、镁是人类必须从膳食中获得的营养素,这些微量元素可以促进胎儿的生长发育,故母体内的微量元素的营养状况与新生儿体内营养状况有着直接的关系。 相似文献
3.
益气活血方药加潘生丁治疗老年冠心病疗效观察青海省军区西宁干休所卫生所白光春,李春堂冠状动脉粥样硬化性心脏病,简称冠心病,亦称缺血性心脏病,胸痹心痛,是严重危害老年人健康的常见病、多发病。自1984年我们应用益气活血法加潘生丁联合治疗老年性冠心病68例... 相似文献
1