拟除虫菊酯

A novel method for the determination of 5 pyrethroid pesticide residues in tobacco leaf and tea samples was established.

应用搅拌棒吸附萃取技术分别萃取烟叶和茶叶中的5种拟除虫菊酯，并利用热脱附系统将萃取到的物质进行热脱附，然后通过气相色谱-质谱联用仪进行分析测定。

Pyrethroid ; Initial pollution degree ; Vegetable ; Half life ; Pollution index

拟除虫菊酯；农药起始污染程度；蔬菜；半衰期；污染指数

To 80 time first, our country also disuse organic chloric pesticide, make the development of pesticide entered a new period.

即杀虫剂以有机磷为主、拟除虫菊酯等各类有机农药同时发展的时期。

With the development of technology, pyrethroids has its new accessory change,its effect time will be longer and efficience will be better.

随着科技的发展，拟除虫菊酯杀虫剂的附着方式有了新的变化，作用期更长，效果更好。

For this reason people through the transformation of the structure to light more stable and insecticidal activity of a new series of pyrethroid insecticides.

为此人们通过对其结构的改造合成出对光稳定且杀虫活性更高的一系列新的拟除虫菊酯杀虫剂。

AIM Aim to study the protein expression of neurotrophic factor in rat brain.

目的 观察拟除虫菊酯对正常大鼠大脑皮层和海马的甲状腺激素反应基因-神经营养因子蛋白表达的影响。

A simple, rapid and reproducible multiresidue analytical method for the determination of pyre-throids at low nanogram levels in vegetable and fruit is described.

引 言拟除虫菊酯是一类重要的合成杀虫剂，具有高效、广谱、低毒和生物降解等特性，主要用于防治棉花、蔬菜和果树的食叶和食果害虫。

Objective To establish a method for simultaneous determination of kelthane and pyrethroid pesticide residues in water.

目的 建立同时测定水中三氯杀螨醇和7种拟除虫菊酯的气相色谱测定方法。

AIM observe the effects of pyrethroid on NGF and BDNF protein expression in rat cortex and hippocampus after thyroidectomy.

目的 观察甲状腺激素在拟除虫菊酯诱导大鼠大脑皮层和海马的NGF和BDNF表达中的作用。

Development of vector resistance to pyrethroid insecticides has been reported all over the world,which is a major obstacle to control of vector-borne diseases.

媒介昆虫的拟除虫菊酯抗性已经在世界范围内存在，是控制媒介传染病的一个主要障碍。

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