苯环

A group of atoms bound in a structure, such as a benzene ring, that is resistant to alteration in chemical reactions.

环核包围在抗化学反应变化的结构中的一组原子，如苯环

Chemistry A group of atoms bound in a structure, such as a benzene ring, that is resistant to alteration in chemical reactions.

环核：包围在抗化学反应变化的结构中的一组原子，如苯环

Ketamine, a derivative of cyclohexanone, structurally like the phencyclidine, is one anesthesia drug of short duration.

氯胺酮，又名开他敏，是一种在结构上与苯环己哌啶有关的环己酮衍生物。

The yields were better when DHPCE with nitro group in meta or ortho position of the benzene ring were hydrolyzed in basic conditions, while the hydrogenolysis and acidic reactions gave very poor yields.

当苯环的间位和对位存在硝基，碱性水解时，在二氢吡啶环的3位引入氯乙醇的酯能得到较好的收率；酸性水解和氢解法则不宜用来合成ADHPA。

Nitrations of both hydroxyl- and acetamino-substituted porphyrins were found to take place at the adjacent position of the substituent in the very aryl ring, whereas nitro group was guided into para positions of unsubstituted phenyl ring during the nitration of nitro-substituted porphyrin.

结果表明，羟基和乙酰氨基卟啉的硝化反应发生在与该取代基处于同一芳环的meta位，而硝基卟啉进行硝化时，硝基取代于其他未取代苯环的para位。

Using the enthalpy of formation of benzene and NO with the similar delocalizing electronic structure to correction, the calculated enthalpy of formation of TATB is acceptable compared with the experimental results.

结果表明，TATB分子中的苯环离域电子结构引起TATB生成焓计算的较大的系统偏差；利用具有相似离域电子结构的苯和NO的生成焓进行修正，计算得到的TATB生成热与实验结果符合较好。

Three kinds of fluorescence polymer with the structure of acridine yellow were synthesized and the sensor for measuring nucleic acid was also fabricated.

论文第三部分开展了以荧光高分子为敏感试剂的新型光化学传感器载体研究，合成了N，N-二甲氨基对苯甲醛缩醛类聚合物，考察了苯环上不同取代基对荧光性能的影响，研究了该类敏感膜对乳酸、尿嘧啶、胸腺嘧啶和腺嘌呤的响应性能；合成了三种具有吖啶黄结构的荧光高分子，制成了测定核酸的传感器。

The homologs of benzene are those containing an alkyl group or alkyl groups in place of one or more hydrogen atoms.

苯的同系物是指是那些苯环上有一个或多个氢原子被一个或多个烷基替代而构成的物质。

Asymmetric reduction of prochiral ketone to these chiral alcohol s by active microbe cells is one of the most promising routes.

以4-氯苯乙酮为苯环上含卤素的芳香酮的模型底物，研究了活性酵母细胞在水相体系中催化该类芳香酮不对称还原合成相应手性醇的反应特性。

The diagnostic vibrational modes of these complexes were predicted and assigned. Bond length, total atomic charge, frontier molecualr obital energy, molecular obital coefficience, and Mullicken Bonding Population demonstrated that electron transfer should have happened from benzene to ammonium, and therefor the charge-transfer complex should be formed.

通过复合物中的键长、原子净电荷、分子轨道能量和系数、Mullicken成键布居等量子化学参数的分析得出了铵和苯环碳原子发生作用而形成电荷转移复合物，铵和苯之间的作用包含s-π相互作用的结论。

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。