反应率

The result showed that the optimum reaction conditions were as follows: molar ratio of BPAD to ECH 1:15, reaction temperature 80 ℃, reaction time 6 h and the product DGEBAD had high epoxy value and yield (0.376 mol/100 g and 147.1% respectively).

结果表明，DGEBAD最优合成反应条件如下：BPAD与ECH物质的量比为1：15，反应温度80℃，反应时间6 h，所得DGEBAD具有较高的环氧值和产率（分别为0.376 mol/100 g和147.1%）。

Synthesis of linoleic acid hydroperoxide with linoleic acid catalyzed by soybean lipoxygenase in aqueous phase was studied.

研究了水相体系中大豆脂肪氧合酶酶促合成亚油酸氢过氧化物的反应，最佳反应条件为底物质量浓度4 11g/L，pH=9，5℃，反应时间120min，亚油酸氢过氧化物产率80%。

However , the B-H reaction often suffers from being inconveniently slow and low yields .

然而，反应速度慢，反应产率低是该反应常遇到的问题。

The Diels-Alder cycloadditions of [60] fullerene for preparation of optical limitingmaterials are discussed in chapter 3 and 6. Soluble cycloaddition derivatives of 〓aresynthesized by the reaction of 〓 with indene,1,1'-biindene andcyclopentadiene derivatives.〓Particular, the Diels-Alder cycloaddition of 〓 with1,1'-biindene under controlled conditions affords the stable monoadduct 〓〓of novel structure, which was confirmed by HPLC, FTIR, FD-MS,〓NMR,〓 NMR, HMQC and HMBC spectra, Its two bridgehead cage carbons resonate at70.91ppm, The 〓 NMR spectra showed 38 lines consistent with the 〓 symmetryassociated with [6,6] addition. The 〓 shows similar optical limitingproperties to that of 〓 in toluene for 8ns laser at wave length 532nm. Moreover, thehigh solubility of this adduct in polar solvents such as THF, acetone enables itsincorporation into sol-gel glass matrix. The thin films prepared via the sol-gel methodshow improved OL behaviour compared to those of 〓. The langmuir-Blodgett filmformation and uv-visible absorption of 〓 are also investigated. LBmonolayer of this compound is prepared on the air-water interface at 〓 mol/l. In chapter 4, three water-soluble derivatives of [60] fullerene: fullerol(1), theaddition product (2)of fullerol (1)with polyvinylpyrrolidone and fumaric acidderivative of 〓(3) are synthesized and characterized.

通过Diels-Alder环加成反应，用茚〓和1，1'-联茚〓及取代茂合成了一系列可溶性的〓环加成衍生物，发现可控制反应条件，使1，1'-联茚与〓反应，并高产率地得到具有新颖结构的单加成物，用HPLC、FTIR、FD-MS 及〓、HMQC、HMBC等多种波谱技术对其结构进行表征，测得它的两个〓杂化的桥头碳的化学位移为〓ppm，证明生成的衍生物为6∶6闭式环加成，〓NMR谱中共给出38个信号，表明〓联茚衍生物分子具有〓对称性；在波长532nm，脉冲宽度8ns的激光下，〓联茚衍生物的甲苯溶液的光限幅性能与〓的甲苯溶液相近，由于〓联茚单加成衍生物熱稳定性好，在四氢呋喃，丙酮等极性溶剂中溶解性好，能分别均匀地掺入溶胶-凝胶中，已发现它的溶胶(so1)光限幅性能优于纯〓的光限幅性能；使用Langmuir-Blodgett技术将〓联茚衍生物在空气和水的界面进行了LB单层膜和多层膜实验以及UV-Vis吸收谱研究，通过等温压缩曲线测试，证明浓度为〓〓时，〓联茚衍生物能够形成单层膜。

Using limekiln gas which was exhausted during theprocess of producing calcium carbide to reaction with water glass, did single-factor experiments and discussed the effect of factors on carbonization process, ratio of production and performance of product ,such as temperature and time of reaction, the density of raw material and carbon dioxide etc.

利用电石生产排放的含二氧化碳的废气—石灰窑气和水玻璃进行碳化反应，进行了单因素试验，探讨反应温度、反应时间、原料配比及二氧化碳浓度等因素对碳化过程、产率及产品性能的影响。

The results show that smaller height of reaction channel can shorten the time which reactants diffuse from channel to reaction surface, longer length of micro-channel can extend residence time of reactants on the catalyst surface, and consequently increase the methane conversion and hydrogen production. The pressure drop between inlet and outlet increases lineally with the increasing of length, while the height influences the pressure drop significantly when the height is less than 0.4 mm. Based on the overall consideration for the methane conversion and resistance characteristic generally, the suitable height of channel should be between 0.4 mm and 0.6 mm.

结果表明：较小的通道高度能够减小反应物在通道中的扩散时间，较长的反应通道长度能够增加反应物与催化剂的接触时间，甲烷转化率和产氢率提高；通道长度线性地影响微通道进出口压降的大小，而在通道高度小于0.4mm时，通道高度显著地影响进出口压降的大小；综合考虑微通道的重整性能和进出口压降等因素，通道高度在0.4~0.6mm之间较为合适。

The effects of reaction solvent, reaction time and molar ratio of the raw material on yields were analyzed.

探索了物料配比、反应溶剂的种类及用量和反应时间等反应条件对产率的影响，并通过正交试验法确定了适宜工艺条件。

The effects of reaction time and the amount of the catalyst on the ester yield were investigated with sodium bisulfate monohydrate green catalyst.

苯甲酸乙酯制备是典型的有机实验，本文采用自行设计的回流－吸水反应装置，一水硫酸氢钠为绿色催化剂，考察了反应时间、催化剂用量对酯化反应产率的影响。

The results showed that enhancing monomolecular reactions could be favorable for increasing the propylene content in LPG, but the dry gas yield increased significantly.

结果表明，强化单分子反应有利于液化气中丙烯含量的提高，但干气产率也会同时增加；而一定程度上促进双分子反应，尤其是负氢离子转移反应的发生有助于抑制干气的生成，但程度太高时却不利于丙烯的生成。

In this section, we focused on the investigation of the condensation, Michael reaction of different aromatic aldehyde with different aryl substituted ketones under solvent-free and PTC conditions, obtained polysubstitutedcyclohexanol derivatives in mordent yield when using TBAB as the catalyst.

通过实验发现，TBAB对该反应具有良好的促进作用，使在液相中需十几个小时甚至几十个小时才能完成的反应，在无溶剂条件下几分钟就可完成，并且使液相中两步完成的反应，而在无溶剂条件下一步就可完成，且产率优良。

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。