查询词典 cinnamic acid

Amyl cinnamate was synthesized from cinnamic acid and amyl alcohol using tungstosilicic acid as catalyst.

以钨硅酸为催化剂，马来酸酐和异戊醇为原料催化合成马来酸二异戊酯。

Amyl cinnamate was synthesized from cinnamic acid and amyl alchol using tungstosilicic acid as catalyst.

以钨硅杂多酸为催化剂，通过桂皮酸和正戊醇酯化反应合成桂皮酸正戊酯，研究了各有关因素对桂皮酸酯化率的影响。

Butyl cinnamate was synthesized from cinnamic acid and butyl alcohol using tungstosilicic acid as catalyst.

以钨硅杂多酸为催化剂，通过肉桂酸和正丁醇反应合成肉桂酸正丁酯。

The tattle unifies in recent years study on the synthesis of cinnamate of the status quo and application prospect,the use of activated carbon as carrier of phosphotungstic heteropoly acid catalyst for catalytic synthesis of cinnamic acid ester had a preliminary inquiry,and the results were satisfactory.

中文摘要：本文结合近几年合成肉桂酸酯的研究现状及应用前景分析，采用磷钨杂多酸作催化剂活性炭为载体催化合成肉桂酸系列酯进行了初步探究，并且结果令人满意。

Furthermore, the important fragment which is composed of pentenyl cinnamic acid and D-Tyrosine, and the ester which is composed of L-N-methylated phenyl amino acid and diketopiprazine was synthesized with considerable yield The conjugation of the new DOPA analogue into the peptide in the total synthesis of Pepticinnamin E was investigatited

另外，本文作者还进一步合成了高收率的戊烯基肉桂酸衍生物与D-酪氨酸的缩合片段及L-N-甲基苯丙氨酸与哌嗪二酮的酯两个重要的结构组成部分；对新多巴衍生物片段嵌入肽链中的工作亦进行了有益的尝试。

After esterification, the ethyl-2-chloro-3-phenylpropionate reacts with diethyl malonate under the catalysis of sodium ethylate, and we obtain the corresponding triethyl ester. The-benzylsuccinic acid is formed by the triethyl ester reacting with concentrate hydrochloric acid and taking place hydrolyzation and decarboxylation reaction at the same time. In order to avoid the formation of cinnamic acid, the sodium ethylate and diethyl malonate must be react sufficiently. The course has simple operation, inexpensive materials and better yield.

具体制备工艺为：首先以L-苯丙氨酸为原料采用重氮化方法得到-2-氯-3-苯基丙酸，再经酯化得到-2-氯-3-苯基丙酸乙酯后在乙醇钠催化作用下和丙二酸二乙酯缩合，发生SN2反应，得到相应的三乙酯，然后经水解和脱羧，得到-苄基丁二酸；在实验中乙醇钠要和丙二酸二乙酯充分反应，避免生成肉桂酸乙酯；该过程操作简单，原料便宜，产率较高，总收率可达到26.8%。

HPLC-DAD methods for analyzing of the nine compounds in Chinese propolis, samples, including caffeic acid, ferulic acid, p-cinnamic acid, kaempferol, apigenin, pinocembrin, chrysin and galangin and for the chromatographic fingerprint of propolis in different regions of China were established.

建立了高效液相色谱法测定中国蜂胶中9个酚类化合物(咖啡酸、p-香豆酸、阿魏酸、山奈酚、芹菜素、白杨素、高良姜素、乔松素、松鼠素)含量的方法；建立了中国蜂胶的高效液相色谱指纹图谱。

A rapid capillary electrophoresismethod has been developed for the determination of eleven bioactive flavonoids in bee propolis:acacetin,apigenin,cinnamic acid,galangin,ferulic acid,hesperidin,luteolin,naringenin,quercetin,resveratrol,and rutin.

使用毛细管电泳法检测蜂胶中11种黄酮类化合物：金合欢素、芹菜配基、兰肉桂酸、黄良姜精、阿魏酸、橙皮甙、毛地黄黄酮、柑桔黄素、槲皮素、白藜芦醇、芦丁。

The study was about the effects of main inhibitory substance — benzoic acid and cinnamic acid on radicle growth,microstructure and ultrastructure of watermelon.

本试验是利用已知的西瓜主要自毒物质—苯甲酸和肉桂酸，研究其对西瓜幼根的生长、显微结构及超微结构的影响。

The results indicated phthalid acid, benzoic acid and cinnamic acid all inhibited the germination of different processed tomato varieties, which caused lower germination rates and shorter radicle compared with those of ck. The difference reached significant level or extremely significant level.

结果表明：邻苯二甲酸、苯甲酸和肉桂酸均抑制了加工番茄不同品种种子的萌发，表现在萌发率、胚根长较对照均有所降低，差异达到显著或极显著，而且随有机酸浓度的增加，这种抑制程度也逐渐增强。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新