| | | 2种燃料燃烧颗粒物致突变性及其联合作用
| | 全科医学论文 作者:闫洪涛,刘君卓,孔祥环,刘红,温天佑,金晓滨,尹学钧,潘小川 【关键词】 液化石油气;煤;燃烧产物;Ames试验;联合作用 摘要: 目的全科医学论文 比较液化石油气(LPG)燃烧颗粒物和蜂窝煤燃烧颗粒物的全科医学论文致突变性以及二者的联合作用。方法 采用Ames法,应用鼠伤寒沙门菌突变型菌株TA98及其衍生菌株YG1021和YG1024进行致突变试验研究,并根据致突变试验结果评价其联合作用。结果 2种颗粒物对YG菌株的致突变作用均高于对TA98的作用;LPG燃烧颗粒物比蜂窝煤燃烧颗粒物的致突变作用更强,前者约相当于后者的8倍;二者的联合作用呈相加类型。结论 煤和LPG燃烧颗粒物均具有很强的直接和间接致突变作用,主要致突变作用来源于硝基和胺基多环芳烃,2种颗粒物同时存在可加大致癌风险。 关键词: 液化石油气;煤;燃烧产物;Ames试验;联合作用 Mutagenicity by combustion particulates from LPG and coal and their joint action Abstract: Objective To compare the mutagenicities by combustion particulates from liquefied petroleum gas(LPG)and coal,and to know the model of their joint action.Methods Ames test was applied.The bacterial strains used were Salmonella typhimurium TA98 and its two derivation strains YG1021 and YG1024.Results The mutagenicity by LPG combustion particulates was about eight times as high as that by coal.The joint action model of two combustion particulates was additive effect.Conclusion Both LPG and coal combustion particulates contain strong direct and indirect-acting mutagens,the mutagenicity is mainly induced by nitroarenes and aromatic amines.Concurrence of combustion particulates will increase the risk of carcinogenesis. Key words: liquefied petroleum gas(LPG);coal;combustion product;Ames test;joint action 煤和液化石油气(LPG)是我国的主要家用燃料,其燃烧过程中产生的颗粒物是室内外空气污染的重要成分。研究表明:燃煤颗粒物中含有大量硝基多环芳烃类物质,具有强致突变活性,并与中国宣威女性肺癌高发存在流行病学联系〔1〕。由于LPG燃烧产生的颗粒物和SO2的数量明显低于燃煤,被认为是清洁燃料。然而,早期的Ames试验结果显示,LPG燃烧颗粒物具有直接和间接的致突变活性,其中含有1-硝基芘(NP)和二硝基芘(DNPs)等致突变活性极强的硝基多环芳烃类化合物〔2,3〕,可见LPG清洁而非安全。本文采用Ames试验方法,应用TA98及其2个对硝基和胺基、羟胺基多环芳烃敏感的衍生菌株YG1021(过表达硝基还原酶)和YG1024(过表达乙酰转移酶)〔4,5〕进行试验研究,旨在评价2种颗粒物致突变活性的差异以及二者致突变的联合作用。
| | | |
| | | | <<<<<全文未完>>>>> 全文字数约2833字 | |
| | |
| |
|