随着化学工业的发展,每年新生产的化学物质约有25万种.其中作为商品出售的为300～500种.而这些物质通过各种途径进入人类环境,最后经过食物链锁集中到食品中残留,对人类的健康可能有潜在的危害.因此,对各种有关化合物的毒性研究甚为重要.目前研究已证实有的化学农药如DDT、林丹、烷基汞、螟铃畏可从母体透过胎盘传递至胚胎.有些农药的代谢产物,具有致畸、 With the development of the chemical industry, there are about 250,000 newly produced chemical substances each year, of which 300 to 500 are sold as commodities, and these substances enter the human environment through various channels and finally remain in the food after being locked in the food chain , Which may be potentially harmful to human health.Therefore, it is very important to study the toxicity of various compounds.Researches have confirmed that some chemical pesticides such as DDT, lindane, alkylmercury, Placenta transferred to the embryo. Some pesticides metabolites, with teratogenic,