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Effects of reaction temperature,reaction time and mole ratio of nitric acid to aromatic hydrocarbons on performance of the catalyst were investigated.

实验结果表明，磷钨酸对低沸点芳烃液相硝化反应具有显著的催化活性，在优化的条件下，苯、甲苯和氯苯的转化率分别为98.0%，99.5%，100.0%。

The factors influencing on the reaction such as dosage of catalyst, molar ratio of acid to alcohol and reaction time were investigated.

考察了催化剂用量、酸醇物质的量比、带水剂用量以及反应时间等因素对产率的影响。

The effect of the molar ratio of amino acid to copper,microwave power,reaction time and pH value on chelate reaction was investigated.

采用微波螯合工艺，对复合氨基酸与铜的配位比、微波时间、微波功率及反应体系的pH对螯合反应的影响进行详细的研究。

Phosphate rock and sulfuric acid reaction, the reaction slurry to liquid-solid separation, dilute phosphoric acid to be wet.

磷矿粉与硫酸反应，反应料浆进行液固分离，得到湿法稀磷酸。

In this work, compared with acid-base reaction, we discussed the conjugated relation of redox reaction .

本文从共轭关系的角度出发，与酸碱反应相对照，较详细地讨论了氧化还原反应中的共轭关系。

We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.

通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。

The optimized structures and energies of the reactants, intermediates, transition states and products of two reaction channels (corresponding to syn-acraldehyde and anti-acraldehyde) in gas or in methanol solvent were obtained. The potential energy profiles reveal the processes of the trimethylamine-catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde in gas or in methanol solvent at the microscope level.

通过研究，获得了三种情况下两种反应通道(分别对应于顺式-和反式-丙烯醛)中涉及的反应物、产物、中间体、过渡态的优化结构及其能量，并由此得到了反应的势能面图，在电子微观层次上揭示了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程。

The reaction process in methanol solvent can be deduced from the computational results with CPCM solvent model and the supermolecular handling, namely the reaction involves four steps in the methanol solvent. The nucleophilic addition of trimethylamine to acraldehyde generates an enolate. Nucleophilic attack of the enolate on the aldehyde forms the carbon-carbon bond, followed by the proton-transfer process and the further elimination generating the product and liberating the trimethylamine catalyst.

对于CH3OH对反应体系的影响，可以综合考虑CPCM溶剂模型及超分子模型下的研究结果，即CH3OH溶剂中反应按四步进行，催化剂三甲胺首先与丙烯醛发生亲核加成，生成的两性离子中间体与甲醛发生类似于Aldol的醛醇缩合，形成碳-碳键，之后发生分子内质子转移，最后经E1cb消除得到产物，并释放催化剂三甲胺。

The catalyst of the present invention is especially suitable for use in the conditions of low reaction temperature, high reaction pressure and high propylene load, may result in high yield of acrylonitrile, and may be used in industrial production.

本发明催化剂特别适用于在较低反应温度、较高的反应压力和高丙烯负荷条件下使用，且可保持高的丙烯腈单收，可用于工业生产中。

Based on three-variable Oregonator model and activated complex theory of reaction rate, nonideal B-Z reaction model is proposed.

同时系统地介绍了非理想性对B-Z反应体系动力学行为及热力学性质的影响。

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。