查询词典 benzene

The results also show that subtituent position on the benzene ring has a great influence on the transfer volume. The trends of change of δ〓ΔΦ〓〓 for mand p-isometers with the composition of the mixed solvent are similar. However, the position and amplitude of the limit valve are different from each other. These are discussed according to the inductive effect and the resonance effect.

研究发现：取代基在苯环上的取代位置对迁移偏摩尔体积有明显影响，间、对位取代的异构体在DMF-水混合溶剂中的δ〓Δφ〓〓随混合溶剂的组成变化规律相似，但极值点的位置及幅度有所不同，根据诱导效应和共轭效应对此进行了讨论。

All of the characters above have showed that liquid paraffin has commendable absorbefacient and relatively ideal desorption to organic exhaust gas (benzene is the standard substance to study organic exhaust gas purification), and has good prospects of research and application.

但是，为得到更多的应用数据，液体石蜡吸收剂的基础性研究还应在多种有机溶剂中进行。同时，液体石蜡吸收剂的抗氧化性和吸收效果的改善等问题也有待于进一步研究。

The depreciation of US dollars causes oil price rising, and at the same time, the prices of domestic chemical material will rise obviously, like Pure Benzene. So, the produce cost of accelerant made in China will be going up, too.

橡胶化学品的最新价格比上次给你确定订单时已经上涨了超过5%，况且我们给你的是非常低的价格，所以我认为你第一个订单所有的产品有足够的价格竞争力。

Acenaphthene was dehydrogenated to afford acenaphthylene by photochemical reaction with N bromosuccinimide in benzene with the addition of quinoline at room temperature and atmospheric pressure was studied.

在常温常压下，以苯作为溶剂，加入喹啉，使苊与N－溴代丁二酰亚胺发生光化学脱氢反应生成苊烯。

Some by-products are benzene, acetone, xylene, formaldehyde, and acetaldehyde.

一些副产品都是苯、丙酮、二甲苯、甲醛和乙醛。

Objective:The research niter benzene puts down to the recovery period fluorine acetamide is poisoned patient's electroencephalogram influence.

目的：研究硝苯地平对恢复期氟乙酰胺中毒患者的脑电图的影响。

It was confirmed that the 〓-CCT of phenyl isopropyl ether is formed on the benzene ring rather thanon the etheroxy bond. The 〓-CCT complex is not strong enough to induce charge transfer and converts to CTC because the isopropyl group is separated from the benzene ring by oxygen atom. As a result,〓 can not transfer from isopropyl to form radical in cage. Therefore phenyl isopropyl ether is difficult to undergo dark oxidation.

这是由于苯基异丙醚和异丙醚形成O〓-CCT的部位不同，苯基异丙醚的O〓-CCT形成在苯环上，与异丙基相隔一个氧原子，不足以诱发异丙基电荷转移而转化为CTC，也就不能有氢质子转移和笼式自由基的形成，因此难于发生暗氧化反应。

Bond length, total atomic charge, frontier molecualr obital energy, and Mullicken Bonding Population proclaimed that electron transfer ought to be possible from benzene to ammonium to form charge-transfer cpmplexes. The molecular obital coefficience showed that the p-π initeraction must be existed between alkali metal cation and benzene.

键长、原子净电荷、前线轨道能量和分子轨道系数、Mullicken成键布居等量子化学参数表明碱金属阳离子和苯环碳原子发生作用而形成电荷转移复合物，这种作用中包含p-π作用的形式。

We select the polyamide resins, the polyurethane resin mixed with isopropyl alcohol and ethyl acetate component solvent, form the plastic printing ink of non-benzene solvent, use the IGT printability meter, the transmission density meter, the magnetic force mixer and many kinds of measuring instrument, measure the sample printing ink printed on the commonly used package printing film. The performance, the printability and the color characteristic of non-benzene solvent ink for plastic film printing were researched with the development printing ink sample.

结合与之相适应的树脂、颜料和助剂，开发研制了以聚酰胺树脂、聚氨酯树脂与醇、酯混合溶剂形成油墨连结料的无苯型塑料凹印油墨，并结合塑料凹印工艺要求，采用IGT印刷适性仪、透射密度仪、磁力搅拌器等多种测试仪器，通过对各种包装常用承印材料及样品油墨的测试，探讨了研制油墨样品的性能、印刷适性和颜色特性。

The result indicates that the big π bond of benzene not only turns benzene into a Lewis base,but also makes it to undergo electrophilic substitution (halogenation,nitration,sulfonation and so on),rather than addition

结果表明，苯的环状大π键结构不仅使苯成为1个Lewis碱，而且使苯容易发生卤代、硝化、磺化等亲电取代反应，但不易发生加成反应。

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。