芳香化合物

The effect of various conditions on the reaction, such as solvent, temperature, the amount of catalyst, the concentration of hydrobromic acid, oxygen/air and so on, was studied.

在此基础上，系统地考察了溶剂、温度、催化剂用量、氢溴酸的浓度、氧气/空气等因素对芳香化合物氧化溴化反应的影响。

Fourteen MC nylons modified by three aromatic compounds containing quinoxaline ring were prepared. Their morphology, impact strength, water absorbency and melting behaviour were characterized.

合成了14种由三种含喹啉环的芳香化合物改性的聚己内酰胺，并对其形态、抗冲击强度、吸水性及熔融行为等进行了表征。

The reactivities of the phenyl boronic acids containing di-, tri-fluoro substituents with pyridyl bromide were investigated in different catalyst system.

利用钯催化的SUZUKI偶联反应，以氟取代的苯硼酸与2-溴吡啶为原料合成了系列新的邻吡啶芳香化合物，研究了二及三氟取代的苯硼酸与溴代吡啶在不同催化体系中的反应性质。

It is shown that formation of the stable, homogeneous melt solutions requires the presence of the transesterification catalyst when substantial amounts of the high melting dihydroxy aromatic compound are present in the initial solid mixture.

表明，当基本量的高熔点二羟基芳香化合物存在于初始固体混合物中时，要求存在酯交换催化剂以形成稳定、均质熔体溶液。

A variety of fennel(Foeniculum vulgare var.dulce)whose blanched aromatic ,celerylike stalks are eaten as a vegetable.

由不饱和以及芳香化合物振动产生的吸收谱带将在第三和第五章中讨论。

According to the amino acid sequences analysis and the three-dimensional structure of MfphA,it was indicated that MfphA encoded by the novel gene located in bph gene cluster belonged to theα/βhydrolase family,which could hydrolyze the meta-fission products during the biodegradation process of monocyclic compounds.

根据MfphA的氨基酸序列分析和三级结构模拟的结果，说明mfphA基因所编码的酶属于α/β水解酶家族，可以在单环芳香化合物降解过程中水解芳环间位开环产物。

Several polynuclear aromatic hydrocarbons, many found in cigarette smoke, are potent carcinogens.

答：在香烟中发现多种多环芳香化合物，它们是致癌的物质。

A series of α-(fluoro-substituted phenyl)pyridines have been synthesized by means of a palladium-catalyzed cross-coupling reaction between fluoro-substituted phenylboronic acid and 2-bromopyridine or its derivatives. The reactivities of the phenylboronic acids containing di- and tri-fluoro substituents with α-pyridyl bromide were investigated in different catalyst systems.

利用钯催化的SUZUKI偶联反应，以氟取代的苯硼酸与2-溴吡啶为原料合成了系列新的邻吡啶芳香化合物，研究了二及三氟取代的苯硼酸与溴代吡啶在不同催化体系中的反应性质。

A newly developed three-dimensional holographic vector of atomic interaction field（3D-HoVAIF）was used to describe the chemical structure of 200 aromatic compounds with toxic effect on Tetrahymena pyriformis.

采用新型的的三维原子场全息作用矢量（3D-HoVAIF）研究了200种芳香化合物的化学结构与其生物毒性的定量构效关系。

The obtained rice husk adsorbent showed great capability of adsorption to aromatic compound and heterocyclic dye in the process of water purification.

以酸处理稻壳为原料，研究了稻壳吸附剂的活化工艺，所制备的吸附剂对水中芳香化合物和杂环染料均有较大的吸附能力。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。