查询词典 benzene

Benzene -- the Prototypic Aromatic System. What is "Aromaticity"?

苯 ——典型的芳香体系&芳香性&是什么？

Benzene - The Prototypic Aromatic System.

苯——典型芳香体系。

A series of pyridazino[3,2-c]1,2,4-triazoles were synthesized from hydrazides and 3-aryl-6- chloro pyridazine s (3a～3d), which were obtained from substituted benzene and succinic anhydride by Friedel-Crafts reaction, cyclization with hydrazine hydrate, dehydrogenation and chloro-substitution.

以取代苯和丁二酸酐为起始原料，经Friedel-Crafts反应，肼合环，Br2/HOAc氧化脱氢后得到一系列1，6-二氢-3-芳基-6-哒嗪酮(2a～2d)。然后将2a～2d与PCl5在POCl3中回流，得到相应的氯代产物3a～3d，将其与酰肼作用，合环后得到一系列未见报道的哒嗪并[3，2-c]1，2，4-三唑类化合物。所有化合物结构均经元素分析，IR，1HNMR和MS谱得以证实，并对其波谱性质进行了讨论

This topic made a selection and a more detailed design calculation for the Oxide reactor according to the known technical parameters, which is the core equipment for sym-Tetramethyl benzene catalyzed oxidated to Pyromellitic Dianhydride , and made a detailed description about the manufacturing process of the reactor.

本课题根据已知的均四甲苯催化氧化法制取均酐的最佳工艺参数，对其核心设备氧化反应器进行了结构选型和较为详细的结构设计计算，并对反应器的制造工艺进行了详细的说明。

The benzene carbon black, resin pyrotic carbon and graphitized carbons were employed to find the relationships between the carbon structure and the differential capacity, reversible capacity and diffusion rate of lithium intercalation.

我们选用苯碳黑、树脂裂解碳和催化石墨化碳等在结构上有明显差别的碳素材料做研究对象，系统研究了碳材料结构特征与锂在其中的可逆插入微分容量、可逆插入容量、可逆循环性和扩散速率的关系。

The raffinate column in the eluxyl unit of an aromatics complex is the key fractionator to separate C8 aromatics from para-diethyl benzene. PDEB is expensive and only if the PDEB content in C8 aromatics side cut is less than 25×10^(-6) mol/mol, the operation cost could be lowered effectively.

对二甲苯装置吸附分离单元的抽余液塔是分离碳八芳烃(C8A)和对二乙苯的关键精馏塔，PDEB价格昂贵，在侧线C8A中的含量要求小于25×10^(-6)mol/mol才能有效降低装置操作成本。

In the third section, the fluorescence enhancement effect of Scopoletin by bovine serum albumin in the presence of anionic surfactant anionic sodium dodecyl benzene sulfonate is studied.

论文第三部分研究了在阴离子表面活性剂存在下蛋白质对莨菪葶的荧光增强作用，在此基础上建立了蛋白质的定量测定新方法。

Several main non-ionic surfactants (AEO、TX、SpanTweem、EL) was used to emulsify liquid paraffin and di octyl sebacate and the anti-coalescence stability of the corresponding emulsion was studied, the impact of the presence of benzene and double bond in lyophobic moiety of surfactant and its length and matching with dispersed phase upon the interfacial viscosity and Gibbs elasticity was analyzed.

本文采用了几种主要的非离子活性剂(AEO、TX、Span-Tween、EL)来乳化白油和癸二酸二辛酯，通过对各乳液体系抗聚并稳定性的考察，分析了活性剂亲油链段的长度、苯环和双键的存在、及亲油链段与被乳化对象分子结构的匹配关系对界面粘度和Gibbs弹性的影响。

The results showed that intermidiate 1, 2-propanediol-sebacate of low relative molecular mass was synthesized with toluene-p-sulfoinc acid as catalyst, benzene as watercarrying agent, and of mole ratio of sebacic acid to 1, 2-propanediol of 1:4. The glass-transition temperatures of PPSC were below 0 ℃ which confirmed that PPSC would be in a high-elastic state of ambient temperature and human body temperature. PPSC was a elastomer with moderate crosslinkage, low module and high elongation, and had rapid degradation ratio (degradation degree more than 50%) in phosphate (pH value 7.4) at 37℃.

结果表明，以对甲苯磺酸为催化剂、苯为带水剂，在酸醇比为1，4的条件下可合成较低相对分子质量的中间体癸二酸聚酯二元醇；PPSC弹性体的玻璃化转变温度在0℃以下，于室温及人体温度下处于高弹态；PPSC为适度交联的、低模量高伸长的弹性体，其在37℃、pH值为7.4的磷酸盆缓冲溶液中具有较快的降解性（降解度超过50%）。

The results showed that silver ion can complex with segregative carbon-carbon double bonds in DHA ester, with isolated C=C bonds in allyl ether and with conjugate C=C bonds in benzene individually.

研究结果表明，银离子可以与DHA乙酯的隔离碳—碳双键、烯丙醚的孤立碳—碳双键及苯的共轭碳—碳双键形成络合物。

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。