介绍了用高效液相色谱一反相色谱法同时测定氯氰菊酯、甲基对硫磷和辛硫磷三元混合制剂中的甲基对硫磷和辛硫磷。
This paper describes an HPLC method to simultaneously determine methyl-parathion and phoxim in mixed formulation of methyl-parathion, phoxim and cypermethrin.
研究了一种直接环合的方法，用2-氯-2氯甲基- 4-氰基丁醛与三氯氧磷反应来制备2-氯-5-氯甲基吡啶。
A synthetic method of direct cyclization was researched that 2-chloro-2-chloromethyl-4-cyanobutyraldehyde was reacted with phosphorus oxychloride to get 2-chloro-5-chloromethylpyridine.
不用杀虫剂筛选对氯氟氰菊酯的抗药性也有显著下降，但下降的速率低于甲基嘧啶磷筛选。
The strain was selected with no insecticide, could also prohibit resistant development to cyhalothrin, but the ratio of decline was lower than pirimiphos-methyl selected.
方法：以3-三氟甲基- 4-氰基苯胺和2- 甲基丙烯酰氯为起始原料经过酰化、 环氧化、取代和氧化四步反应合成比卡鲁胺。
Methods:Bicalutamide was prepared from 4-cyano-3-(trifluoromethyl) aniline and 2-methylacryloyl chloride by four steps: acylation, cyclization, substitution, and oxidization.
本文用2-氯-5-氯甲基吡啶经氨基化，和N-氰基乙亚胺酸乙酯反应，最后甲基化得到吡虫清。
In this thesis, 2-chloro-5-chloromethyl pyridine is ammoniated, which followed by the reaction with N-cyano ethyl ethylimidoate, finally is methylated to gain the objective product.
大鼠出生前暴露于甲基对硫磷和氯氰菊酯混配引起脑细胞dna链断裂损伤，呈剂量-反应关系，这种效应在子鼠可能持续一段较长的时间。
Also the exposure induced the neuron cell's DNA chain to rupture and the damage displayed an dose-effect relation and may persist for a long time.
大鼠出生前暴露于甲基对硫磷和氯氰菊酯混配引起脑细胞dna链断裂损伤，呈剂量-反应关系，这种效应在子鼠可能持续一段较长的时间。
Also the exposure induced the neuron cell's DNA chain to rupture and the damage displayed an dose-effect relation and may persist for a long time.
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