拟除虫菊酯

After the synthetic pyrethroids wastewater passes through the suitable pretreatment definitely anaerobe processing method to carry on further processes,its COD removeing rate can achieves 80%.

拟除虫菊酯生产废水经过适当的预处理后，完全可以采用厌氧流化床工艺进行进一步处理，其COD去除率达到80%。

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。

The method has better accuracy and recovery and is suitable for determining pyrethoid pesticides in celery cabbage.

该法具有较高的精密度和灵敏度，且操作简单、分析速度快，可作为一种经济实用的分析方法应用于大白菜中拟除虫菊酯农药残留的常规检测。

Objective:A multiresidue method based on solid-phase extraction and gas chromatography with electron capture detector was developed for the simultaneous determination of 15 pesticides in drinking water.

目的：建立同时检测饮用水中15种农药残留的固相萃取-气相色谱分析方法，所检测的农药包括5种有机磷、5种有机氯、5种拟除虫菊酯。

A PCR product was amplified using RT-PCR method from total RNA from the abdomens of R strain using the degerated primer. The PCR product was purificated and cloned. The plasmid is pBluescript Ⅱ KS. Recombined plasmid DNA was identified by endoenzyme. The results indicated there were different P450 genes in the PCR product.

运用这对简并引物首次从德国小蠊抗拟除虫菊酯的品系R中扩增出的特异性的DNA片段，经纯化、连接和转化，重组至pBS质粒，筛选阳性克隆，提取重组质粒的DNA，并经初步的酶切鉴定，发现存在着不同的CYP4基因。

As fine chemical raw material, isoprene can be used to produce various perfumes, medicines, pesticide intermediates such as high value-added linalool, pyrethroid and ionone.

化学级异戊二烯是精细化工的原料，可以生产高附加值的芳樟醇、拟除虫菊酯、紫罗兰酮等多种香料、医药、农药中间体。

Synthesis , Structure and Biological Activities of Pyrethroids with Nitrogen Containing Five Membered Heterocyclic Ketone Moieties

含氮五元杂环酮的拟除虫菊酯的合成，结构和生物活性

In addition, NOS activity decreased with the time prolonged in vitro, when oxyhemoglobin, a scavenger of NO, was applied, the NOS activity kept stable. This result above demonstrated that NO can inhibit NOS activity, and it was the inhibition of NOS activity by NO that may be an important protective mechanism to resist the neurotoxicity by Py.

另外，本实验还发现，在体外实验时，一氧化氮合酶活性可随时间的延长而逐渐下降，当向反应体系中加入氧合血红蛋白去除一氧化氮的作用后，则一氧化氮的抑制作用消失，酶活性保持稳定；以上结果表明一氧化氮对于一氧化氮合酶活性具有抑制作用，而且这种抑制作用，可能是机体对抗拟除虫菊酯毒性作用的一种重要保护机制。

Up to now, there is no a systematic and deepgoing study about the effect of Py on EAA in CNS.

目前，关于拟除虫菊酯对中枢神经系统兴奋性氨基酸的影响尚缺乏深入而系统的研究。

Eleven of the populations were in Hardy-Weinberg equilibrium, whereas two strains had higher number of heterozygotes than expected, indicating a possible heterozygote advantage. The frequency of kdr was strongly correlated with the reduced mortality observed in the bioassays when treated with pyrethrum and bioresmethrin synergized by piperonyl butoxide.

Kdr基因频率与一定农药选择压力下的家蝇死亡率成反比，显示kdr是家蝇拟除虫菊酯抗性的主要因素。14个野生家蝇种群中，有5个种群对PYR／pho和BRM／pbo的抗性指数分别大于25和10，属高抗性家蝇种群。

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