反应的

To improve the selectivity, the Co/Mn/Br catalyst system with ethanal as an additive was studied and the reaction conditions were also optimized, which were as follows:the amount of ethanal 10%(mole ration base on the substrate), reaction temperature 100℃,reaction time 30min,the oxygen pressure 0.2MPa, the amount of the composite catalyst Co/Mn/Br 7%,the mass ration of different ingredients 2:2:1. Under these conditions, the yield comes to 24.10% and the selectivity reaches 75.03%.

为了提高反应的选择性，论文初步研究了以乙醛作为添加剂条件下各工艺参数的影响，并进行正交优化，得出最佳条件为：乙醛加入量1：10，反应温度100℃，反应时间30min，氧气压力0.2MPa， Co/Mn/Br混合催化剂加入量7%，质量比2：2：1，在此条件下，反应产率为24.10%，选择性可达75.03%。

This study investigated the tempt pulping kinetics of wood of the fast-grown Gmelina arborea. Excellent process control and pulping optimization can be obtained. The process of kraft pulping of G.

进行云南石梓之硫酸盐法批式制浆工程动力学研究，探讨对各影响因子的反应级数、脱木质素反应的活化能和频率团子导出脱木质素反应动力学方程式期能了解制浆反应中之各种过程之影响因子，做为制浆制程控制之合理化和蒸解釜设计之依据。

The Effect of different reaction conditions (solvent, reaction temperature, molar ratio of iodobenzene and acrylic acid, kind and amount of base, amount of catalyst, reaction time) on the yield was investigated. The suitable condition of the reaction was obtained.

考察了不同反应因素（溶剂、温度、原料比、缚酸剂及其用量、催化剂用量、反应时间）对反应的影响，确定了该催化剂对碘代苯与丙烯酸交叉偶联生成反式－肉桂酸的适宜反应条件。

Calculations show that:nonreaction is the major process at low collision energy;vibrational excitation facilitates reaction;the inelastic nonreactive cross section is about three times larger than reaction cross section under 10-4eV collision energy.

计算结果表明：在低碰撞能下，散射主要以非反应过程为主；振动激发有利于反应的进行；在小于10-4eV碰撞能下，非反应非弹性散射截面和反应截面的比值约为3。

The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of Sodium tetraphenylborate (NaBPh4) with carboxylic anhydrides catalyzed by Pd(PPh3)2Cl2 in THF was first reported.

第二章：微波辐射下Pd配合物催化NaBPh_4与羧酸酐的偶联反应研究本章中我们在微波辐射条件下，研究了PdCl_2(PPh_3)_2催化NaBPh_4与羧酸酐偶联反应，合成出了十种不对称芳酮，并分别考察了微波辐射功率、辐射时间、溶剂和原料配比等因素对反应的影响，优选出了较佳的反应条件，并根据文献及实验结果，讨论了可能的反应机理。

The Suzuki reaction, the coupling of organoborate compounds with organic electrophiles catalyzed by Palladium complexes, is a valuable Csp2-Csp bond forming reaction. The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of phenylboronic acid with benzyl halides catalyzed by Pd(PPh3)2Cl2 DMF/H2O(v/v=10 : 2) was first reported.

第四章：微波辐射下Pd配合物催化端烯与芳卤偶联反应研究本章中我们在微波辐射条件下，研究了PdclZ(P Ph3)：催化端烯与芳卤的偶联反应，合成出了七种乙烯基化合物；并分别考察了微波辐射功率、辐射时间、原料配比、和PTc等因素对反应的影响，优选出了较佳的反应条件，并根据文献及实验结果，讨论了可能的反应机理。

Recently, theoretical approaches to these reactions also indicated that often the reactants and products had ground states of different spin multiplicities, and the transformations of spin multiplicities occurs frequently in thermal reactions.

近年来，人们在研究这类反应的过程中还发现反应的基态反应物和基态产物通常有着不同的自旋态，整个热反应前后频繁出现自旋多重度改变的现象，即反应不遵守&自旋守恒定律&。

The optimum conditions were as follows: the volume proportion of water and glacial acetic acid was 4, the reaction temperature was 30℃ and reaction time was 10 minutes.

由此对反应条件加以优化，得出反应的适宜条件是当水和冰醋酸的体积比为4，反应温度为30℃，反应时间为10 min时，收率可达78%。

The effect of reaction temperature,reaction time,materials ratio on the synthesis of piperidine alcohol benzoate ,hindered amine light stabilizer,from piperidine alcohol and benzoyl chloride by direct condensation were studied,and the proper technological conditions were given as follows:the reaction temperature is 95℃;reaction time is 4 h; the mole ratio of reactants,n∶n is 1∶1.4,the amounts of solvent is 40 mL(based 0.1mol piperidine alcohol),the arerage yield ...

王树清，高崇，苯甲酸哌啶醇酯HALS的合成工艺研究研究了以苯甲酰氯和哌啶醇为原料直接缩合合成苯甲酸哌啶醇酯受阻胺光稳定剂时反应温度、反应时间、原料配比等条件对合成反应的影响，确定了最佳工艺条件。最适宜的工艺条件是：反应温度95℃、反应时间6h、原料摩尔比n∶n为1∶1.4，溶剂用量为70mL(相对于0.1mol哌啶醇)，苯甲酸哌啶醇酯的收率为91.05%，产品纯度98.5%。

Thirdly, the acrylic rosin was synthesized by the addition reaction from gum rosin andacrylic acid. The levo-pimaric acid was converted into acrylic pimarie acid throughDiels-Alder addition with acrylic acid. The abietic-type acids in the gum rosin were inisomerization balance under high temperature, and the abietic acid and palstric acid would beconverted into levo-pimaric acid and reacted in the later type.

第三，通过脂松香与丙烯酸加成合成了丙烯酸松香，该反应是左旋海松酸与丙烯酸发生Diels-Alder加成反应生成丙烯海松酸，由于脂松香中的枞酸型树脂酸在高温下处于异构化平衡状态，因此随着反应的进行枞酸、长叶松酸等会异构化为左旋海松酸参与反应。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。