苯环

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。

Along with the falling of acenaphthene concentration, some intermediary products exist.

中间产物包括多种含一个苯环的酯和直链的酸、醇、酯等。

This effect is shown to be correlated with the conformational changes of acyl backbone induced by aniso-damine.

采用拉曼差光谱的方法，进一步研究了药物的苯环与酸性磷脂的疏水相互作用。

The present invention overcomes the shortcomings of the prior art; a main active ingredient is biphenyl cyclooctene lignin which is mainly allotype Kadsura peltigera; the main active ingredient is used as an index ingredient of the quality control of the compound Caulis Spatholobi granules with measurement of HPLC determination method.

本发明对现有技术存在的缺陷进行改革，以异型南五味子丁素为主的联苯环辛烯类木脂素成分为主要活性成分，将其作为复方鸡血藤制剂质量控制的指标成分，采用HPLC含量测定方法进行测定。

Effect of amphetamine and phencyclidine on DNA binding activities of serum response and dyad symmetry elements .

影响安非他明和苯环的DNA结合活动的血清反应和对子对称要素。

The microwave-assisted reactions could be finished within several minutes to give high conversion and selectivity.Substrates whose aryl groups were substituted phenyl or naphthyl groups were more suitable in this reaction.

以TfOH为催化剂，在优化的反应条件下，大部分反应都可在数分钟内完成，该反应对于芳基是取代苯环或萘环的的底物效果较好，能得到较高的原料转化率和产物选择性。

The structure model of 5, 10, 15, 20-meso-tetraphenylporphyrin has been optimized by the first-principle calculation. The result shows that the angle between the benzenes and the porphine plane is 55°, and the rotation of the benzenes lead to a slight bending of the porphine plane.

利用第一性原理确定了四苯基卟啉分子的结构模型，结果表明分子中的苯环与卟吩骨架的夹角为55°，且笨环的自由旋转导致卟吩骨架略微偏离平面形状。

A range of oligoaryls having alternating para- or meta-benzene-furan rings is synthesized by rapid convergent/divergent method from the annlation of a propargylic dithioacetal and an aldehyde having a propargylic dithioacetal moiety as the substituent.

中文摘要结合分流法/汇集法，利用炔丙基硫缩酮单体和另一具有醛基的单体进行环化反应，可以迅速合成对位及间位取代苯环呋喃交错寡聚物。

Phenolic agent in alkaline lignin separated fromthe the black liquid can result in a chain etherized reaction on cycloalkanes by alkaline distilling so as to make lignin change its property.

从蒸煮黑液中分离的碱木素苯环上的酚羟基可与环氧烷基胺发生醚化接枝反应，从而使木素胺化改性。

Arylselenoureas with electron donor group on benzene ringreacted with excess sulfinyl chloride to give 2-aminobenzosele-nazoles.

苯环上有给电子基的N-芳基硒脲在过量的氯化亚砜中自动氧化合环生成2-氨基取代笨并硒唑。

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。