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- Biphenyl pyrethroid 联苯菊酯
- Sodium biphenyl, 20%w/w solution in diethylene gl... 询价 联苯钠(20%25溶于二乙二醇二乙醚);
- It is mainly pyrethrin (pyrethroid) with 50 percent in the insecticides. 它们多属拟除虫菊酯类农药,占总数的50%25;
- In China,pyrethroid insecticides were forbidden to apply in rice field. 但是,在中国一直被禁止应用于水田害虫防治。
- The Extraction and Analysis for the Residue of Three Pyrethroid Pesticides in Medicinal Herbs Isatis indigotica Fort. 板兰根中三种拟除虫菊酯杀虫剂的残留分析。
- The synergistic tests showed that the synergism toward pyrethroid of 1(endo) is better than 2 (exo). 杀虫增效活性试验证明 :内型结构 ( endo) 1的增效活性强于外型结构 ( exo) 2。
- The quantitative analysis of dihydrosafrole, by gas chromatography on 2% DEGS packed column and using biphenyl as internal standard, was introducced. 采用DEGS为固定液、联苯为内标物,用气相色谱法测定二氢黄樟油中二氢黄樟素的含量。
- It is a large problem for present agricultural environment that pyrethroid pesticides affect aquatic bicorganisms. 拟除虫菊酯类农药对水生生物的危害是当前农业环境的一大问题。
- Advances in the endocrine disrupting effects of pyrethroid pesticides were introduced. 主要介绍了拟除虫菊酯类农药在内分泌功能扰乱方面的研究进展。
- BACKGROUND & AIM: To study effects of polychlorinated biphenyl PCB126 on B(a)P-induced genotoxicity. 背景与目的:探讨多氯联苯126(PCB126)对苯并(a)芘[B(a)P]遗传毒性的影响。
- Objective To understand the resistance situation of Culex pipiens quinquefasciatus and Anopheles dirus to pyrethroid. 摘要目的掌握海南省致倦库蚊和大劣按蚊对拟除虫菊酯类杀虫剂的抗药性发生及发展趋势。
- We observe photophysical and electrochemistry property of biphenyl imide by substitutent group effect. 藉由取代基效应观察化合物光物理性质及电化学特性的改变。
- Methods The larvae dipping method was used to test the resistance to pyrethroid. 方法采用幼虫浸渍法,测定其对拟除虫菊酯类杀虫剂的抗性倍数。
- Intramolecular photoinduced charge transfer can be efficiency by restricting biphenyl group to make it more conjugate. 藉由分子结构的限制,使联苯间的共轭性质变好,使分子内能有效的产生光致电荷转移。
- Objective:To determine eight residual pyrethroid pesticides in vegetables and fruits at the same time. 目的:探索和研究同时测定蔬菜和水果中8种菊酯类农药残留的方法。
- Methods:A new synthesis route for felbinac preparation was studied with biphenyl under ultrasound. 方法:以联苯为原料,在超声催化作用下合成新药联苯乙酸。
- The results show that the pyrethroid containing 2 - imidazolidone in the structure has insecticidal activity. 实验结果表明:将2-咪唑啉酮引入到拟除虫菊酯结构中,其拟除虫菊酯具有一定的杀虫活性。
- Then they can be further recrystallized to produce biphenyl with a purity of over 99.9%. 进一步用溶剂结晶法去除了联苯中的杂质;获得99.;9%25以上联苯。
- Abstract: Dichlorochrysanthemate is the important intermediate of pyrethroid insecticides. 摘 要: 二氯菊酯是拟除虫菊酯杀虫剂的重要中间体。
- Fine Chemical and Hi-Tech Products : Organic synthetical technical biphenyl; Organic synthetical technical diphenyl. 国内外贸易:公司拥有进出口权,开展以企业产品为主的国内外商品贸易与技术贸易。