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The degrading mechanism of polyester was studied, and practicable process of PET degradation is found to be alcoholysis.

探讨了聚酯废料的解聚机理，确定其合理解聚方法为醇解。

Firstly, the preparation of DG by enzymatic glycerine alcoholysis of palm oil was studied.

试验同时发现，体系中游离脂肪酸生成速率较快，尤其在前12小时。

The effect of temperature, catalyst, and alcoholysis agent, etc, on PET alcoholysis was studied, and reacting conditions and formulation of PET alcoholysis were determined.

深入研究了温度、催化剂和醇解剂等对PET醇解反应的影响，确定了醇解工艺条件及配方。

The alcoholysis of trichlorosilane has been studied experimentally and theoretically,each step is cooperating endothermic process.

采用溶剂法和B3LYP/6-31G基组研究了三氯硅烷的乙醇解反应，计算得出每一步醇解均为放热反应，并得出了反应的最佳温度、最佳进样方式、主反应和副反应的活化能及其可能的反应途径曲线。计算结果和实验结果有较好的一致性

With methanol as solvent and NaOH as catalyst,the influence of the concentration of NaOH ,reaction temperature and reaction time to the alcoholysis of polyvinyl acetate is studied by the homogeneous design procedure.

使用均匀设计法研究了甲醇作为溶剂，氢氧化钠作为催化剂时，聚醋酸乙烯酯醇解反应中碱的物质的量比、反应温度和反应时间对聚乙烯醇醇解度的影响。

Progress on preparation and purification of trichlorosilane ;2. Study on synthesis of trifluoropropyl trichlorosilane ;3. The alcoholysis of trichlorosilane has been studied experimentally and theoretically,each step is cooperating endothermic process.

采用溶剂法和B3LYP/6-31G基组研究了三氯硅烷的乙醇解反应，计算得出每一步醇解均为放热反应，并得出了反应的最佳温度、最佳进样方式、主反应和副反应的活化能及其可能的反应途径曲线。

The method of 4-methylimidazole synthesis using pyroracemic aldehyde was selected,and flow chart and operation process were studied.

本文对4-甲基咪唑常用的几种合成方法进行了介绍，对其工业化生产的优缺点进行了对比，最终选定了丙酮醛法，并给出了工艺流程图和操作步骤。

The catalytic mechanism of prolinamide phenol on the direct aldol reaction was studied using quantum mechanics theory.

利用量子力学理论研究了脯氨酰胺酚类催化剂催化直接不对称Aldol反应的机理。

The nucleophilic attack step of a classical Aldol reaction was studied using acetaldehyde anion and formaldehyde as reactants.

采用乙醛负离子和甲醛作为反应物，对经典的醛醇缩合反应中的亲核进攻步骤进行了研究。

The catalysts used in the preparation of di acetone alcohol by the Aldol condensation were studied in detail, and a new kind of catalyst Ca 2/Al 2O 3 is developed.

对丙酮经Aldol缩合制二丙酮醇的催化剂进行了研究，研制出新型催化剂Ca 2 /Al2 O3，这种催化剂对丙酮的缩合反应具有较理想的活性及选择性。

And so he said, you're going to go to Carnegie Mellon no problem. What

他说，到研究生院，你去卡内基梅隆大学。

First, trapping season: during the night mosquito attractant for catfish catfish effective trapping season.

一、诱捕季节：夜蚊子活动期间为鲶鱼引诱剂诱捕鲶鱼的有效时节。