查询词典 reactants

The novel reaction to create 6,7-dimethoxy-1-(3,4-dimethoxyphenyl)-4-hydroxy-naphthalene 83 in one-pot procedure was found during the synthesis of diphyllin, which started from catechol dimethylether and succinic anhydride and involved heating the molten mixture of the two reactants in the presence of polyphosphoric acid at 140℃.

这个反应是用邻苯二酚二甲醚和丁二酸酐为原料，把两个原料的混合物熔融后，加入PPA，在140℃下搅拌后就会有产物生成。

A liquid crystal with pyridine group was synthesized from reactants of pyrogallic acid and isonicotinato by esterification reaction.

以焦性没食子酸和异烟酸为原料合成了带吡啶官能团的液晶配体。

The oscillating behaviors in darkness of pyrogallic acid-KBrO-HSO-system have been studied, the relations between induction period τ as well as oscillating period and the initial concentrations of reactants of the system have been determined experimentally at 25℃、35℃.

研究了无光照条件下焦性没食子酸-KBrO-HSO体系振荡的基本规律，得到了25℃、35℃时起振时间τ、振荡周期T与各反应物起始浓度之间关系的经验方程。

In this thesis, the reaction of methanol conversion into hydrocarbons on HZSM-5 and SAPO molecular sieves, which is of great importance to industry, is selected as probe reaction to get deeper insights into the structure of solid catalysts and the interaction of reactants with catalysts during adsorption and catalytic reaction by solid state NMR.

本论文主要以固体NMR为研究手段，以甲醇制烃类作为探针反应，详细研究了催化剂的结构、吸附过程中反应物与催化剂的相互作用、反应过程中反应物与催化剂的相互作用，主要取得了如下结果： 1 原位MAS NMR实验结果表明，甲醇制烃类的过程是通过&碳池&机理来实现，&碳池&的组成随反应的进行而变化，在反应前期，&碳池&由饱和烃类构成，随着反应的进行，饱和烃类和不饱和烃类共同组成&碳池&。

With these versatile catalyst systems, electronically and sterically diverse reactants can be efficiently cross-coupled, without the need for substrate-specific optimization of reaction conditions.

凭借这些&神通广大&的催化剂系统，那些电子云和空间位阻各不相同的反应物都能有效地实现交叉偶联，无需针对底物对反应条件优化。

The present invention provides an improved method of producing polyester by the polycondensation of polyester forming reactants wherein the improvement comprises utilizing, as the polycondensation catalyst, lithium titanyl oxalate.

本发明提供了一种由制备聚酯用反应物的缩聚反应制备聚酯的改进方法，其中的改进包括使用钛氧基乙二酸锂作为缩聚反应催化剂。

The characterization of the coked catalyst shows that the deactivation of catalysts is caused by a jam of bulkier molecules, which are the alkylbenzenes from both reactants and products, so the deactivation cannot be avoided.

苯与长链烯烃的烷基化反应过程中，β沸石催化剂的失活是由于产品直链烷基苯本身和原料中带入的杂质芳烃逐渐堵塞孔道、阻止了反应物分子接近活性中心引起的，是由晶内开始逐渐向外发展的。

The influence of synthetic reactants ratio and crystallizing time on the synthesis of the zeolite was studied.

实验结果表明，以氨水和乙二胺为模板剂都可以合成出Z5M-5沸石分子筛，合成温度越低，所需时间越长。

In the liquid electrolyzing method, the solution of ammonia and oxydol were used as the reactants, and copper was used as the electrodes. Polynitrogen cluster N_(20) has been detected from the products.

在液相电解法中，以铜为电极，电解氨水和双氧水的混合溶液，反应6小时后，可以检测到产物中可能含有氮原子簇N_(20)的信号。6小时后，电流明显减小，产物中已无氮原子簇的信号。

The optimized configuration and electronic structures of reactants and products were studied by molecular orbital PM3 method.The reaction enthalpies ...

用半经验的量子化学PM3方法研究了反应物和产物的电子结构，得到了产物的最优构型和电荷键序分布以及反应焓变，讨论了反应中的电子效应和空间效应。

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。