辛酸的

Catalyst 70, catalyst 80, stannous caprylate were compared based on the impact of different catalyst on surface drying time of gel system.

毕业论文字数：3654 页数：7）摘要：实验选用催化剂W70、催化剂W80、辛酸亚锡，比较不同催化剂种类对硅凝胶表干时间的影响，得到合适的催化剂种类和用量。

Then,the core molecule was used as a coupling agent to condensate with polyethylene glycolsof different molecular weight or polyethylene glycol monomethyl etherin the presence of stannous octoate as catalyst and diphenyl ether as azeotropic agent to remove water.

在辛酸亚锡催化下，以二苯醚为共沸脱水剂，将三官能度小分子TMP-SK3作为偶联剂，进一步与不同分子量的端羟基聚乙二醇和聚乙二醇单甲醚缩合，减压下共沸脱水，制备了以TMP-SK3为核，PEG或PEGm为臂的三臂星形大分子。

The result showed due to yeast fermentation process there were many new aroma components in jujube wine which were different from the juice: Isoamyl alcohol, Phenylethyl alcohol, Benzyl alcohol and so on; jujube juice hexadecanoic acid and other senior fatty acid composition obviously degradated; Alcohols and esters composition were sharply upward.

反映出发酵过程由于酵母的繁殖代谢产生了很多新成分，如异戊醇，丁酸乙酯，辛酸乙酯等；枣汁中十六酸等高级脂肪酸成分明显降解，苯乙醇，2，3-丁二醇，己二酸(2-甲基)丁酯，己二酸二异丙酯等醇类和酯类成分呈急剧上升的趋势。

Recollected once imbark course, Yang Dong had very many bitter experiences.

回想起曾经的创业历程，杨东有很多的辛酸经历。

Be in this however " horse of horizontal Dao Li "" Peng is imperatorial " rear, in his lifetime, unexpectedly one paragraph makes a person miserable the marital past with the emotional experience of sad relative and labyrinthi......

然而在这位&横刀立马&的&彭大将军&背后，在他一生中，竟有一段令人辛酸哀戚的感情经历和曲折悲凉。。。。。。

During preparation, mercapto ethanol isooctanoate, alkyl or ester tin chloride and organic solvent are first heated and refluxed while adding catalyst; organic layer is then obtained through separating liquid and decompression distilled; and through further steps, the compound is obtained. The synthesis process of the present invention is simple, and has conversion rate higher than 95 %, normal pressure and low reaction temperature, low power consumption and less pollution, and the prepared compound has high reaction activity and low toxicity.

制备时，将异辛酸巯基乙醇酯、烷基或酯基氯化锡和有机溶剂加热回流，同时加入催化剂，然后通过分液，保留有机层，再对有机层进行减压蒸等步骤制得所述化合物；本发明合成工艺简单，转化率大于95％，反应在常压条件下，反应温度低，从而降低了能耗，减少了污染，所制备的化合物具有反应活性高和毒性小的特点，使用安全。

The properties of material were studied by adjusting the scale of 1,4-butylene glycol, index of isocyanate, the content of SiO_2 and stannous octoate.

试验了1，4-丁二醇比例、白碳黑和辛酸亚锡含量、异氰酸酯指数对弹性体性能的影响，测试了材料的力学性能和粘度变化。

The PDLLA with a viscosity average molecular weight beyond 20×10~4 was obtained under the optimum synthesis conditions of the lactide after being recrystallized 4 times as the monomer,the vacuum level of 0.098 MPa,reaction temperature of 150-160 ℃,reaction time of 6-8 h,and using 0.1%-0.18% stannous octoate as catalyst.

实验结果表明，重结晶4次后的丙交酯作为单体，在辛酸亚锡摩尔分数为0.1%—0.18%，真空度0.098 MPa，聚合温度150—160℃下聚合6—8 h可获得粘均相对分子质量Mη大于20×104的聚D，L-丙交酯。

But it is known that Senator Kennedy gave a toast more poignant than the one the previous evening.

但听说肯尼迪参议员的敬酒词比前一晚的更加辛酸感人。

Priv But it is known that Senator Kennedy gave a toast more poignant than the one the previous evening.

TIME， Oct.7， 1996， p.42 但听说肯尼迪参议员的敬酒词比前一晚的更加辛酸感人。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。