查询词典 pesticides

Workers are using hand-operated pumps to spray pesticides to kill the caterpillars, but others quickly return.

工人用手动泵喷洒杀虫剂来消灭毛虫，但是毛虫很快又回来了。

Pesticides ; haptens ; artificial antigens ; design ; synthesis ; progress

农药；半抗原；人工抗原；设计；合成；进展

Class-specific polyclonal antibodies for O,O-diethyl phosphorothioate pesticides had been generated. A series of generic haptens were synthesized and coupled to bovine serum albumin and ovalbumin for immunogens and coating antigens, respectively. New Zealand rabbits were immunized with immunogens to obtain corresponding polyclonal antibodies.

通过分析硫代磷酸二乙酯类农药的结构特点，设计并合成了系列半抗原；采用活泼酯法将半抗原分别与牛血清蛋白和卵清蛋白偶联制备了系列免疫原和包被原；通过免疫新西兰大白兔获得了相应抗硫代磷酸二乙酯类农药的类特异性抗体。

Using heptachlor epoxide as interal standard, the linearity of 28 pesticides were good with 〓 in 0.99～1. 000, except phosphamdon with 〓 at 0.963. The RSD for most pesticide were below 10％.

采用该方法，以环氧七氯为内标，29种农药中28种农药的线性关系良好，〓在0.99～1.000之间（磷胺的〓为0.963），大部分农药的RSD0％。

In addition, pesticides can also abnormal sperm, and lead to miscarriage, stillbirth, birth defects, such as benomyl, DBCP, methylmercury, such as epoxy heptachlor.

另外，农药也可使精子异常，而导致流产，死胎、新生儿缺陷，如苯菌灵、二溴氯丙烷、甲基汞、环氧七氯等。

Heptachlor epoxide was used as internal standard. Results The detection limit ranged from 0.2-15μgkg^(-1). The recoveries of most pesticides were good with the ranged of 70%-120% in 9 medicine crops.

结果 对48种中药材进行了检测；除敌敌畏、杀虫脒、磷丹及三唑磷外，其余农药的检测限都在0.2~15gkg^(-1)之间；以9种中药材为例检测，大部分农药的回收率在70%~120%之间。

Pesticides were extracted from tea with hexane-acetone (volume ratio is 1:1) in an ultrasonic bath and cleaned up on a Florisil and neutral alumina column, then were determined by gas chromatography with negative chemical ionization mass spectrometric detection in the selected ion monitoring mode, and with heptachlor epoxide as the internal standard. Spiked blank samples were used as standards to counteract the matrix effect observed in the chromatographic determination.

茶叶试样用V/V=1/l混合提取剂超声提取，经Florisil矽藻土和中性氧化铝混合层析柱净化后，以环氧七氯为内标物，采用GC-NCI-MS的选择离子监测方式分析；探讨了茶叶试样的基体诱导色谱响应增强影响所产生的分析误差及其减小的措施，用空白试样基体匹配校准曲线法定量分析。

It also requires no herbicides or pesticides.

它也不需要除草剂和杀虫剂。

There is a lot of concern over the amount of herbicides and pesticides used in farming.

人们对农业上灭草剂和杀虫剂的用量非常担忧。

Scientists have found contaminants such as herbicides, pesticides, estrogen and birth control chemicals in the river.

科学家们发现的污染物，如除草剂，杀虫剂，雌激素以及河道中的生育控制的化学品。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。