查询词典 pyrethroid

By contrast, organophosphate, carbamate and pyrethroid pesticide residues can be removed easily because of their instability.

有机磷类、氨基甲酸酯类及拟除虫菊酯类农药稳定性相对较差，不同操作对其有很好的去除作用。

Objective To establish a rapid GC method for determination of pyrethroid pesticide residues in celery cabbage.

目的：建立气相色谱测定大白菜中5种常见拟除虫菊酯农药残留简单、快速、安全的实用型方法。

In an effort to elucidate the mechanisms of the resistance,our laboratory has previously identified and reported a number of genes associated with resistance to a widely used pyrethroid deltamethrin,including a Culex chymotrypsin gene.

为阐明媒介昆虫对拟除虫菊酯的抗性机制，本实验室先前已经鉴别并报道了一系列拟除虫菊酯代表种溴氰菊酯抗性相关基因，其中包括糜蛋白酶基因。

The limited detectable concentration was 85μg/L. The cross-reaction rate between PAb and other pyrethroid pesticides was low, except deltamethrin.

以抗体与甲氰菊酯的反应率为100%，抗体与其他4种菊酯类农药交叉反应率很低，与溴氰菊酯交叉反应较高。

For developing an immunoassay for multiple residues of pyrethroid pesticides, the hapten N-2- carbanmoyl-(3"-phenoxyphenyl) methyl 3-(2"-Cldoro-3",3",3"-trifluoropropenyl)-2, 2-dimethylcyclopropane- carboxylate was synthesized from cyanohydrin and 3-(2"-Chloro-3",3",3- trifluoropropenyl)-2, 2-dimethylcyclopropanecarboxylic acid via hydrolysis and esterification. The synthesis of the hapten was foundation of preparaing anti- cyhalothrin polyclonal antibodies.

为了制备对单一拟除虫菊酯高特异性的抗体，以菊酸和氰醇为起始原料，通过水解、酯化反应合成了半抗原N-2-氨甲酰-(3-苯氧基苄基)甲基-3-(2-氯-3，3，3-三氟丙烯基)-2，2-二甲基环丙烷羧酸酯，为进一步制备抗三氟氰菊酯的特异性抗体奠定基础。

The hapten can be synthesized with a spacer attached at the aromatic moiety of the pyrethroid, through the middle of the molecule and at the cyclopropane moiety.

半抗原的合成入手点主要为菊酯分子的三碳环、中间和芳环部分，连接一个连接臂作为半抗原。

The pyrethroid pesticides were determined by gas chromatography and electron capture detection.

除虫菊酯类农药用毛细管气相色谱-电子捕获检测器检测。

For the determination of organochlorine and pyrethroid pesticide residues, the sample was extract with petroleum ether.

有机氯和拟除虫菊酯类农药残留测定中，利用石油醚对样品进行提取。

So unsusceptibility of 〓-ATPase to pyrethroid insecticide may be associated with pyrethroid resistance.

Na〓K〓-ATPase对拟除虫菊酯类杀虫剂的不敏感性是抗性家蝇品系对拟除虫菊酯杀虫剂产生抗性的机理之一。

Using a long-term reared housefly population which is very susceptible to pyrethroid insecticides as the susceptible strain, a population collected in 1993 in Shanghai and has been treaded by cyhalothrin as the resistant strain, we bioassayed their susceptibility to organophosphorus, carbamate, pyrethroid and organehloride insecticides. We also investigated the role of metabolic enzymes, i. e. esterase, GST, MFO and of target enzymes, i. e. AChE and 〓-ATPase in resistance to insecticides. Cyhalothrin resistance inheritance, the co-toxicity coefficient of cyhalothrin and methylene dithiocyanate was also studied. The insecticides resistance in adults and larvae of houseflies was compared and the mechanism of resistance differences between adults and larvae was discussed.

本文以采自野外并经过室内多代筛选的三氟氯氰菊酯抗性家蝇品系和室内多年饲养的敏感家蝇品系为试虫，测定了抗性家蝇品系和敏感家蝇品系对拟除虫菊酯杀虫剂三氟氯氰菊酯、氯菊酯、有机磷杀虫剂DDVP、氨基甲酸酯杀虫剂残杀威、有机氧杀虫剂DDT的抗性水平，并通过活体增效剂实验和离体生化实验研究了抗性品系的解毒酶和靶标酶的变化，本文还研究了三氟氯氰菊酯和增效剂I对抗性家蝇的增效作用及增效机理、家蝇幼虫和成虫对杀虫剂的抗性差异及其抗性差异的机理。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐