查询词典 benzene

At present, extraction of rhynchophylline commonly is used in basification benzene, can gett high purity after treatment , the process is simple and feasible for commone production.

摘 要：目前国内常用碱化苯提法提取钩藤碱，经处理后可得到高纯度钩藤碱，该工艺简单可行，适于大规模生产。

The invention discloses the method of preparing benzaldehyde with benzene carbonic acid.

本发明公开了一种苯甲酸气相加氢还原制备苯甲醛的方法。

On the contrary, benzene hexachloride and several related compounds frequently

相反，六氯苯和几种有关化合物致病时，惊厥往往是损伤的第一个体征。

Benzene hexachloride, dichlorodiphenyltrichoroethane and organophosphorus pesticides in 103 soil samples collected from Wutongqiao district of Sichuan were detected by gas chromatography. Spatial distribution characteristics of residual pesticide in soils of transitional zone from mountain to plain was evaluated by employing the methods of GIS and geostatistical techniques.

以四川省五通桥区为例，利用气相色谱法检测丘陵平原过渡区103个样点的土壤样品中六六六、滴滴涕和10种有机磷农药残留量，利用地统计方法和GIS技术，评价研究区域内的土壤农药残留空间分布特征。

Be cautious about the use of benzene hexachloride as an insecticide as a dust or spray against pea and bean weevil because it is very

六六六作为杀虫剂喷洒于豌豆，青豆类，毒杀象鼻虫，要慎用，因为它极易致癌。

Hazard analysis sheet is not updated and potential hazards are not identified in part of raw materials e.g. heavy metal, benzene hexachloride and DDT in raw materials, heavy metal and toluene diamine in inner packaging materials.

危害分析表中对部分原料的不同危害未明确识别，如原料鲜奶(化学危害：六六六/滴滴涕/黄曲霉毒素/重金属/四环素/磺胺类等)和内包材甲苯二胺/重金属

The content of heavy metal and pesticide in the aquatic product of Shenzhen market were investigated on June, 2002. The results showed that the contents of the pollutants were Hg: 0.005~0.221 mg/kg, As: ND~1.210 mg/kg, Pb: 0.4~1.6 mg/kg, Cd: ND~0.33 mg/kg, Cu: 0.1~6.4 mg/kg, Cr: 0.02~0.49 mg/kg, benzene hexachloride: ND~0.041 mg/kg and DDT: 0.002~0.022 mg/kg wet weight, respectively.

2002年6月对深圳市场水产品中的重金属和农药含量进行了调查，结果表明：深圳市场水产品（本研究中水产品均以湿重计算）中各污染物质量分数分别为Hg 0.005~0.221mg/kg，As未检出～1.210mg/kg，Pb 0.4~1.61mg/kg，Cd未检出～0.33mg/kg，Cu 0.1~6.4mg/kg，Cr 0.02~0.49mg/kg，六六六未检出～0.041mg/kg和DDT为0.002~0.022mg/kg。

On the charge distribution of the benzene ring is investigated.

分子的电荷分布是分子在主要山静电控制的一些反应中的化学活性的重要指标。

This is a specific chemical structure that consists of a benzene ring with various additions, and it's highly reactive.

这个特别的化学结构包含了有很多附缀的苯环，并且具有高活性。

Groups in adjacent positions on a Benzene ring are referred to as being "Ortho" one to the other.

在苯环上处于相邻位置的基团，位于相互的"邻位"上。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。