查询词典 aromatic

In the heartwood of the old trunks, there is ample oak tannin and aromatic materials of oak, which ensures the quality of the oak products.

这种老树干的心材中，含有丰富的橡木单宁和橡木的芳香物质，是保证橡木制品质量的关键所在。

In the part two, we reported the classical Knoevenagel condensation between aromatic aldehydes and acyclic active methylene compounds or cyclic active methylene compounds containing heteroatom such as (2-thio)barbituric acid, Meldrum's acid using ionic liquids as reaction medium.

在第二部分中我们研究了离子液体中开链活性亚甲基化合物、杂环类活性亚甲基化合物如(2-硫代)巴比妥酸、Meldrum's酸与芳香醛之间的Knoevenagel缩合反应。

In one embodiment, the invention is a system for initiating free radical polymerization comprising: a in one part, one or more amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms and optionally containing one or more heteroatoms or heteroatom containing functional moieties, and one or more cationic counter ions and b in a second part, a liberating compound which reacts with the nitrogen atom bound to the boron atom upon contact with the amido-borate to form an organoborane radical.

在一个实施方案中，本发明是引发自由基聚合的体系，包括：a在一个部分中，一种或多种含有一个或多个包含有机硼酸根的阴离子酰氨基-硼酸盐部分和一个或多个阳离子抗衡离子的酰氨基-硼酸盐化合物，其中的硼原子键合到氨的氮原子或含一个或多个氮原子的有机化合物，例如烃基胺、烃基聚胺或含一个或多个氮原子和任选含一个或多个杂原子或含杂原子的官能部分的芳族杂环的氮原子上，和b在第二部分中，在与酰氨基-硼酸盐接触时与键合到硼原子上的氮原子反应形成有机硼烷基团的释放化合物。

The factors such as introduction of aromatic heterocycle with small delocalization energy, formation of acceptor-donor structure, and strong electron-donating or electron-withdrawing abilities of substituents lead to the high third-order nonlinear optical property.

引入离域能小的芳杂环，形成吸供构型，增大取代基的吸或供电子能力等有利于获得较大的三阶非线性光学性能。

A serial of novel thiophene-based main chain conjugated compound with varieties of aromatic rings and heterocycle, such as acenaphtenequinoxaline phenanthrenequinoxaline ,have been synthesized on the base of looking for lots of references and summarized others research work.

在查阅大量文献和综合前人所作工作的基础上，我们选择卤代芳烃与Sn金属有机试剂在Pd催化下合成了以萘基喹喔啉和菲基喹喔啉为主的一系列噻吩与杂环构成的交叉共轭化合物。

The 4-acetylenyl phenylformic acid synthesized with the method contains carboxyl and terminal alkynyl, and is a valuable synthesized used in organic chemistry and is of great prospect to be applied in biomedicine, medicine field, etc, particularly in replacing phenylacetylene which is recently widely used in the synthesis of aromatic heterocycle, such as triazole.

本发明方法合成的4-乙炔基苯甲酸结构中含有羧基和末端炔基，是有机化学中极有价值的合成"砌块"，在生物医学、医药等领域有着十分重要应用前景，特别是取代苯乙炔近年来被广泛用于三唑等芳香性杂环的合成。

In this thesis, a series of derivatives of -Huperzine A and benzylpiperidine were designed and synthesized, including nonsteroidal anti-inflammatory drug derivatives, heterocycle derivatives, aromatic derivatives and its sckiff derivatives, etc.

全部目标化合物进行了胆碱酯酶的活性测试，石杉碱甲类衍生物的乙酰胆碱酯酶活性比母体差，说明该类取代基在胺基上取代可能会使石杉碱甲衍生物的活性降低。

C〓 thiophene didn't exist in aromatic fraction at 200℃, but very abundant at 300℃, indicating that heterotrophy resulted in the disappearance of chlorophyll which had transformed into more stable compounds with phytane side chain.

在200℃热模拟产物芳烃组份中不存在C〓噻吩，而300℃热解产物中该化合物含量较高，这可能暗示着异养黄化作用导致了叶绿素消失，并转化为更加稳定的具植烷侧链化合物。

The adsorbents of synthetic graphite which can adsorb both long chain nparaffins and polycyclic aromatic hydrocarbons were prepared by the use of high pressure homogenizer.

使用高压匀浆泵制备出具有同时吸附长链正构烷烃和稠环芳烃能力的石墨吸附剂。

One system found on the basis of HPLC system, which was suit for high temperature. The temperature selectivity was studied through analyzing benzene homologue and aromatic hydrocarbons.

本文在液相色谱基础上构建了一套适合高温分析的色谱系统，并通过对苯同系物及芳香烃的分离，考察了温度对色谱分离选择性的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。