目的：通过研究燃汽油机动车尾气成分，及其对DNA分子的氧化损伤，在分子生物学水平上探讨燃汽油机动车尾气污染物的遗传毒性效应与机制。
Objective: the genotoxicity and its molecular mechanism of gasoline vehicle exhaust were studied through examining exhaust components and the oxidative DNA damage induced by them.
目的：观察氯化锂的遗传毒性特征并对其毒作用机制做一初步探讨。
Objective: to study the genotoxicity of lithium chloride and its mechanism in mice.
该文就细胞毒性、基因毒性、外遗传毒性这三条基本途径，对电磁辐射引起生物学效应的可能机制作一概要综述。
This thesis summarized some possible mechanisms on the biological effects of electromagnetic radiation, according to cytotoxicity, genotoxicity, epigenetic toxicity.
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