苯环

The different catalytic systems are discussed. The results show that sodium tungstate has effective catalytic ability.

实验结果表明，钨酸钠和双季铵盐催化体系能在温和的条件下，催化稀过氧化氢溶液氧化环己醇、苯甲醇、环己烯。

Nonlinear optical organic materials have more advantages than inorganic materials. Based on the molecule design, a new D-π-A structure NLO chromophore molecule [4-nitro-4'-N,N-di aminoazobenzene] 3 with nitro, azobenzene and epoxy is synthesized.

以环氧氯丙烷、苯胺、对硝基偶氮苯胺为原料，设计并合成了一种具有推拉电子结构、含双环氧基的偶氮类有机非线性光学发色团分子4-硝基－4'-N，N-二缩水甘油氨基偶氮苯。

The conclusion shows that Anthracene is the main compound in the extracts from water solution of YM coal oxidation. The contents of Hexadecanoic acid、Anthrone and 9,10-Anthracenedione are comparatively high. Aromatic and nitrogenous heterocyclic compounds were also detected, which shouldn't be neglected.

结果表明：在所得水溶液的苯可溶物中检测出绝对高含量的蒽；含量较高的棕榈酸、蒽酮和蒽醌；另外还有一些微量的芳环、杂环类化合物和一系列的长链烷烃。

Aim To design and synthesize a series of 2--(4-cyclopentyloxy-3-methylbenzylidene)cyclopentanone arylamine Mannich bases,and to determine their antitumor activities in vitro.

目的设计合成一系列2--(4-环戊氧基-3-甲氧基苯亚甲基)环戊酮Mannich碱类化合物，并对其抗肿瘤活性进行体外试验。

The organic compounds like cyanine, macrocyclic azotic compound, azo-metal complex, metal chelate, benzoheterocycle dye, have been applied to recordable optical discs as the recording materials.

菁类、大环氮杂、偶氮、金属螯合物、苯并杂环等类的化合物已被作为光记录材料进行研究。

The epoxidised cashew nut shell oil acrylate oligomer for UV curing materials was synthe- sized using epoxidised cashew nut shell oil and acrylic acid as main raw materials,N,N-dimethyl- benzylamine as catalyst and p-hydroxyanisole as inhibitor.

以N，N-二甲基苄胺作催化剂、对羟基苯甲醚作阻聚剂，环氧化腰果壳油和丙烯酸为主要原料合成了一种新型的紫外光固化预聚物——环氧化腰果壳油丙烯酸酯。

Petroleum-derived contamination may be dominant source in the study area depending on the distribution of fluoranthene/pyren, benzo anthracene/ benzo (a anthracene + chrysene BaA/(BaA+ Cy, MP/P.

对多环芳烃特征组分的比值（荧蒽／芘、苯并蒽／BaA/(BaA+Cy及甲基菲与菲的比值分析表明：该河流表层沉积物的多环芳烃主要来源于原油污染。

Great progress in benzene selective hydrogenation to cyclohexene has been made in recent years. So it was very important for research and development of its downstream products.

摘 要：近年来我国在苯选择加氢制取环己烯的研究领域取得了很大的进展，环己烯下游产品的开发研究具有十分重要的意义。

Selective hydrogenation of benzene to cyclohexene over Ru is the best method to obtain cyclohexene.

苯选择加氢合成环己烯的方法是大批量获得环己烯的最佳方法。

The background of developing catalytic technology for partial hydrogenation of benzene to cyclohexene and the progress in its investigation at home and abroad are introduced briefly.

简要介绍了苯部分加氢制环己烯催化技术的开发背景，国内外相关领域的研究进展，比较了不同的工艺路线，展望了环己烯的应用前景。

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。