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The results suggest that positive OPPs may be a kind of alkylating agent , mainly methylated the N-7 position of guanine and induced base pair substitution of formed adduct , and cross linkage to induce DNA recombination and mutation .

推测阳性有机磷农药作为烷化剂，主要是使鸟嘌呤的N－7位甲基化，引起碱基置换；或形成加合物，造成交联，从而引发DNA重组修复而致突变。

Objective : To develop a rapid and sensitive analytical methods for the quantitative determination of trace OPPs in offshore sediment .

目的：建立快速、灵敏的检测近海沉积物中痕量有机磷农药的方法。

Opps ! Look I 've got . I often hang out in the morning .

哟，看我拍下了啥！我习惯早上出去兜一圈。

A GC method has been developed to determine 28 kinds of OPPs in seawater simultaneously by GC-FPD .

本文提出了一种GC-FPD测定海水中28种有机磷农药残留的新方法。

In Chapter III , It is method of determination for13 OPPs with weak polarity in Allium Chinense .

第三章低温提取气相色谱法测定荞头中13种弱极性有机磷农药残留量。

A method for the determination of 13 organophosphorus pesticide ( OPPs ) residues in Allium Chinense has been established .

建立了荞头中13种有机磷农药（OPPs）残留量的气相色谱分析检测方法；

It is important to evaluate the OPPs that we should understand their regulation of degradation in soil , which has important and realistic meaning to take the valid preventible measures against the pesticide pollution .

了解有机磷农药在土壤环境中的降解转化规律是评价有机磷农药的重要依据，对采取有效的防治措施来消除有机磷农药污染也具有重要的现实意义。

The organophosphorus pesticides ( OPPs ) are widely used at present in the world . After years of usage , the impact of their toxicity and residues on human health and ecosystems is very serious .

有机磷农药是当今世界广泛使用的一类农药，其毒性和残留问题对人类健康和生态环境构成潜在的威胁。

A total of 24 organophosphorus pesticides ( OPPs ) were tested for mutagenicity in B. subtilis DNA repair test , and the chemical structure and mutagenicity relationship were analyzed and the mechanism of mutagenicity was discussed .

本研究采用枯草杆菌DNA重组修复试验，检测了24种有机磷农药的诱变性，并分析了有机磷的化学结构与诱变性的关系及其可能的诱变机理。

The temperature has an effect on the soil microbial activity and the hydrolyzation of OPPs , the maximal degradation is at the range of microbial growth and propagation , the OPPs are found to degrade at a lower rate in sterilized and no organic matter soil ;

温度对土壤微生物的活性以及农药的化学水解都有较大影响，有机磷农药的降解速率在适宜微生物生长繁殖的温度下有极大值：农药在灭菌和去除有机质的土壤中降解更慢；