The filtrates are combined and any remaining traces of the thioglycolic acid are washed out using 500 ml water and then 200 ml cold methanol.

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The solubility of the novel polyamides are greatly improved compared with the conventional aramids, especially the polyamide with dendritic blocks of the second genernation as side chains are soluble in most of the common organic solvents such as ether, ethyl acetate, chloroform, acetone, tetrahydrafuran etc.

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Fluoroalkyl acetic acids were converted to their corresponding carbonyl chlorides, and the latter reacted with o-aminpbenzyl aldehyde and ammonia gas to give 3-(1-imino-fluoroalkyl)-1H-quinolin-2-ones in moderate yields.

將2-氟烷基乙酸轉(zhuǎn)化成相應(yīng)酰氯，后者與鄰氨基苯甲醛在通氨氣條件下以較高產(chǎn)率轉(zhuǎn)化為相應(yīng)的3-（1-亞胺基-氟烷基）-1H-喹啉-2-酮丰满的free毛茸茸的videos。

L-Phenylalanine was then obtained by alkylation of N- glycine ethyl ester with benzyl bromide in the presence of an asymmetric phase-transfer catalyst-N-benzyl-cinchonine chloride, followed by hydrolysis of the resulting product.

以甘氨酸乙酯鹽酸鹽和二苯甲酮為起始原料合成了N-二苯亞甲氨基乙酸乙酯日韩免费爱插摸视频，后者在手性相轉(zhuǎn)移催化劑-N-芐基氯化辛可寧誘導(dǎo)下與烷基化試劑溴化芐發(fā)生不對(duì)稱相轉(zhuǎn)移催化烷基化反應(yīng)，水解得到L-苯丙氨酸一级毛片黄色录像。

The company mainly produces cinnamaldehyde, cinnamic acid, cinnamic alcohol, cinnamic nitriles,-bromo-cinnamic aldehyde, amyl cinnamic aldehyde, acetic acid Gui ester, cinnamic acid acetate, L-carnitine, coumarin , vitamin B1 and so on, one of cinnamon products only amounted to more than 100 kinds of quality and technical content are up to domestic advanced level, is expected to reach an annual output value of 10 billion yuan.

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The company mainly produces benzaldehyde, cinnamic aldehyde, cinnamic acid, cinnamic alcohol, cinnamic nitriles,-bromo-cinnamic aldehyde, amyl cinnamic aldehyde, acetic acid Gui ester, cinnamic acid acetate, L-carnitine, coumarin, vitamin B1, etc., of which only cinnamon series reached more than 100 kinds of products, its quality and technical content are up to domestic advanced level, is expected to reach an annual output value of 10 billion yuan.

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Abundant in hydrolyzed extensin, glycosyl trehalose and tocopheryl acetate, it gives the skin more nutrition and care and helps reduce traces of time, making the skin bright, delicate and tighter.

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The asymmetric reduction of prochiral P-oxo ester, aromatic ketone and aliphatic ketone to its corresponding chiral alcohol by yeast cells were studied respectively in this work when ethyl 4-chloro-3-oxobutyrate, acetophenone and 2-octanone were as the model substrates.

本文以4-氯乙酰乙酸乙酯、苯乙酮和2-辛酮分別為β-羰基酯黄网页观看、芳香酮和脂肪酮的模型底物在线国内在线播放av，研究了利用活性酵母細(xì)胞催化這三類前手性酮不對(duì)稱還原合成相應(yīng)手性醇的反應(yīng)特性。

The conductivity and the molar conductivity of the ionic liquid in actone, water, DMF, acetic acid were investigated at different temperatures.

利用磷酸三丁酯與N-甲基咪唑在恒溫150℃下一步合成了離子液體1-丁基－3-甲基咪唑磷酸二丁酯高清一级电影，考察了其在丙酮老熟妇乱子交视频，水，DMF在线亚洲性爱，乙酸溶劑中的電導(dǎo)率及摩爾電導(dǎo)率激情综合五月综合激情。

In the third chapter, eight new complexes of 4, 6-dimethylpyrimidine 2-thioacetic acid with rare earth metals has been synthesized and characterized by means of elemental analysis, molar conductivity, IR,〓 NMR and TG-DTA. The general formula of the complexes is Ln〓(n=4 or 5). In the complexes, the deprotonated ligand coordinated to the rare earth metal ions in chelate bidentate mode. 4 or 5 molecular of crystal water existed in the complexes.

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