反应的

The traditional catalyst used in acetal synthetic reaction is strong inorganic acid.

文摘：缩醛合成反应的传统催化剂为无机强酸，但由于副反应多、腐蚀性强和易污染环境等缺点，其使用受到限制。

The effects of the kind and amount of solvent used, reaction time and the amount of catalyst and acetylation reagent on the reaction were studied.

讨论了溶剂体系及用量、反应时间、催化剂用量、酰基化试剂用量等对反应的影响。

The hydrolyzation process of aconitum diterpenoid alkaloids was studied, and the reaction type was defined according to its optimized experimental conditions.

阐明了乌头碱类双酯型二萜生物碱水解反应过程，确定水解反应的类型以及最佳水解条件。

The optimum conditions of acyl chlorination and esterification were investigated as follows: molar ratio of DPR to PCl3 1∶0.33, reaction temperature 50℃ and reaction time 3 h.

实验结果表明：温度对于DPR酰氯化反应的影响较小；而原料物质的量之比对反应程度的影响较大，PCl3用量的增加有利于反应程度的增加。

In addition, the possible reaction mechanism was discussed.

并初步探讨了该反应的可能反应机理。

Di-2-ethylhexyl adipate was synthesized with complex solid super acid SO(superscript 2- subscript 4)/ZrO2-TiO2 as catalyst. Effects of catalyst dosage, molar ratio of adipic acid to 2-ethyl hexanol, reaction temperature on reaction were studied.

以复合固体超强酸SO(上标 2-下标 4)/ZrO2-TiO2为催化剂合成了己二酸二（2-乙基）己酯，考察了催化剂用量、酸醇投料比和反应温度对反应的影响。

To estimate the activation energy of the decomposition, the Friedman isoconversional method was applied. The activation energy was calculated as a function of conversion. The results confirm that more than one reaction occurs in the decomposition of basic zinc carbonate.

采用Friedman法对实验数据进行分析，结果表明，反应的活化能数值随着分解率的不同而变化，由此推断该反应是由多步反应组合而成的，其平均表观活化能E。

In vitro excision tracts have been mapped as single-strand gaps produced when repair is provoked under condition of restricted DNA synthesis.

於试管中停止再合成反应的情况下，观察移除反应后断裂的单股核酸产物，以进行移除反应范围的分析。

Similarly, HMPA has theability to markedly affect the stereoselectivity of the tandem reaction.β-Aminoketones can be generated with high stereoselectivity (the ratio of trans-anti andtrans-syn is up to 94/6) when 4 equiv. of HMPA was used as the additive in THF.

其次，我们以二乙基锌来引发串联反应，发现HMPA对反应的选择性同样产生显著的影响，并通过在反应体系中加入4当量的HMPA，高立体选择性地得到了β-氨基酮类化合物(trans-anti／trans-syn一般为94／6)。

The catalyst for IB dimerization, reactive site, reactive mechanism and dynamics research date was reviewed in this paper and try to explain the mechanism of selectivity enhancing by adding Tertiary butyl alcohol during IB dimerization and provide reference for the study of dimerization afterwards.

本文对异丁烯二聚催化剂、反应活性位、机理及动力学研究成果进行了综述，试图解释在异丁烯二聚时，加入的叔丁醇对二聚反应选择性提高的作用机理，为今后二聚反应的研究提供参考。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！