查询词典 reaction

Because ammonium paratungstate is difficult to dissolve in water,the chemical reaction of acid decomposition APT to H2WO4 is solid-liquid reaction and hinder the reaction uniformly and effectively carrying on.

李玲 APT在水中的难溶性使得酸分解APT制取钨酸的化学反应成为固－液反应，从而妨碍了反应均匀有效地进行。

The suitable reaction parameters were found that mole ratio of potassium persulphate to sodium sulfite,mole percent of initiator and mole percent of BS relative to total monomer, mass percent of total monomer in water, mass percent of surfactant in water, reaction temperature,pH value and reaction time are 3:1,0.06%, 1.45%,20%,5.5%,50 ℃,6 - 7 and 12 h, respectively.

研究得到了适宜的反应条件：n（K2S2O8）：n（Na，SO3）=3：1，引发剂和Bs相对于单体总量的摩尔分数分别为0.06％和1.45％，总单体在水里的质量分数为20％，SDS在水里的质量分数为5.5％，pH=6—7，反应温度50℃。

The mechanism of the dehydrogenation reaction of Os〓 with methane The minimum energy reaction path of this reaction is found not to be one of three PESs of a certain spin state, but to involve the crossings between each two adiabatic surfaces of three spin states.

本文主要用UB3LYP方法，结合相对论赝势，系统地研究了气相Os〓及其氧化物阳离子OsO〓（n=1-3）与甲烷的反应以及气相FeO〓与乙烯的反应的机理。

The calculated results show that vibrational state of HCl influences its reaction probabilities greatly, the feature of PESs plays considerable role for how rotational state affecting its reaction probabilities , and the reaction probabilities appear 'Gold Rule'.

其计算结果表明，振动量子态对反应几率影响很大；势能面的地形对转动量子态如何影响反应几率起重要作用；反应几率表现出&黄金规则&。

The mechanism of the dehydrogenation reaction of OsO〓 with methane For the reaction, OsO〓+CH〓→OOs〓+H〓, the minimum energy reaction path involves two PESs of quartet and doublet states.

因此整个反应的速率决定步骤是分子氢从二重态的亚甲基二氢化物中还原消去，能垒大约为30.4kcal/mol.c。

For three different reaction paths leading to ortho, meta, para-chloropyridine, two transition states have been located by PM3 on each reaction path, while only one transition state by ab initio, however both methods give the same results: the energy of transition state and activation barrier on producing 2-chloropyridine are the lowest among three reaction paths, so 2-chloropyridine is obtained priorly, which agrees with the experimental results.

生成邻、间、对氯代吡啶三条不同反应途径PM3方法优化得到两个过渡态，而从头算方法中只优化得到一个过渡态。但两种方法的研究结果均表明：三条反应途径中生成2-氯吡啶的过渡态能量和活化能最低，因此反应优先生成2-氯吡啶，与实验结果一致。

β-（3,5-Diterbutyl-4-hydroxyphenyl） propionyl chloride is synthesized with 3,5-methyl propionate as raw material via hydrolytic reaction and replacement reaction,and the replacement reaction conditions were explored.

摘 要：以β-（3，5-二叔丁基-4-羟基苯基）丙酸甲酯为原料，通过水解反应和酰氯合成反应合成了抗氧剂中间体β-（3，5-二叔丁基-4-羟基苯基）丙酰氯。

Cetyl pyridinium bromide monohydrate is used to exchange the metal irons in the innerlayers of sodium-based bentonite which is used as raw material and the organobentonites are obtained with orthogonal technique by changing the reaction conditions such as reaction time,reaction temperature,pH,the quantity of quaternary ammonium,and the ratio of bentonite to water.

采用正交L16(45)实验法，以Na基膨润土为原料，用溴化十六烷基吡啶为插层剂，与膨润土层间的金属离子进行离子交换，通过改变反应温度、反应时间、pH值、固液比、季铵盐添加量5个因素，得到不同条件下的有机膨润土。

It is currently accepted that corneal graft rejective reaction is a complicate reaction course which is led by T lymphocyte,the over-activation of cytokine and adherence factor participate corneal graft rejective reaction.

目前研究表明，角膜移植排斥反应是一个T淋巴细胞主导参与的复杂的反应过程，受多种因素的调节，许多细胞因子、粘附因子的过度活化参与角膜移植排斥反应。

This thesis studied three different kinds of hydrolytic condensation methods of Me_3SiCl and MeSiHCl_2: co-hydrolytic condensation reaction, step-by-step hydrolytic condensation reaction and reversive hydrolytic condensation reaction, and analysized the hydrolytic condensation mechanism of chlorosilane.

论文研究了Me_3SiCl和MeSiHCl_2的三种不同的水解缩合方法：共水解缩合法、分步水解缩合法及逆水解缩合法，并对氯硅烷的水解缩合机理进行分析。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。