查询词典 ethyl

The paper mainly studies the catalytic effect of crown ether for Darzens glycidic ester condensation of aromatic aldehydes with ethyl chlorocetate in mixed sovent system.

本文报道了在混合溶剂中冠醚催化作用的 Darzens 酯缩合反应，并合成了四个芳族缩水甘油酸酯类化合物。

The glycidol is protected by ethyl vinyl ether first to form 2,3-epoxypropyl-1-ethoxyethyl ether, then polymerized or copolymerized with EO by initiation with the mixture of diphenylmethylpotassium and triethylene glycol to give the well-defined poly.

得到的聚合物用甲酸水解去保护，并在二氧六环和甲醇的混合溶剂中用氢氧化钾溶液皂化后，得到了聚合物链的侧端挂有羟甲基官能团的线形聚醚linear Polyglycidol和poly。

In order to find the causations of precipitate in Soybean-flavor liquor, fat was soaked in the liquor in pottery jars (volume 20 kg), pottery pots (volume 400 kg) and aluminous pots (volume 50m3) respectively with all the containers managed by active carbon and guhr for the tests and the samples were obtained from them every five days to analyze and determine the changes of higher fatty acid ethyl esters.

为弄清豉香型酒产生沉淀的原因，对小陶坛、大陶缸及铝质大罐盛装斋酒浸泡肥肉进行了试验，每隔5天取样一次，分析测定高级脂肪酸乙酯的变化情况，小陶坛容量20kg，大陶缸容量400kg，大罐容量50m3，并用活性炭和硅藻土进行了斋酒处理试验。

The hypha growth-inhibiting method and the virulence determination method were used to investigate the inhibition effects of the petroleum ether fraction, chloroform fraction, ethyl acetate fraction, n-butanol fraction and water fraction in the alcoholic extracts from the aboveground of Peganum harmala L.

采用抑制菌丝生长法和毒力测定法，研究了骆驼蓬地上部醇提物的石油醚、氯仿、乙酸乙酯、正丁醇和水5个极性部位对南瓜枯萎病菌、西瓜枯萎病菌Fusarium oxysporum f。

CTAB is one kind of high-molecular compound, Chinese full title is "the headachy trim ethyl bromine dopamine", it has the very strong digestion ability, can destroy the plant the cell wall and the cell membrane.

CTAB 是一高分子化合物，中国充分的标题是&the headachy 修剪乙基溴dopamine&，它有非常强的消化能力，可能毁坏植物细胞壁和细胞膜。

The invention relates to a synthesis method of N-acetylaminoglucose, which comprises dissolving D-glucosamine hydrochlorate and alcohol at the mass ratio of 2-2.5:100, adjusting the pH value of the solution to 9-10, filtering, taking the filter liquor, mixing and adding acetic anhydride at the 50-60wt% amount of D-glucosamine hydrochlorate, mixing and reacting for 2h, using absolute ethyl alcohol to recrystallizing, filtering and recrystallizing via water, to obtain rod-shape food grade N-acetylaminoglucose.

本发明涉及一种N-乙酰氨基葡萄糖的合成方法。该方法的具体步骤为：将D-葡萄糖胺盐酸盐和乙醇按2～2.5∶100的质量比溶于水中，调节该溶液的pH值为9～10；过滤，取滤液，搅拌下加入乙酸酐，其加入量为原料D-葡萄糖胺盐酸盐量的50～60wt％；搅拌反应2小时后，用无水乙醇进行重结晶；过滤，晶体再用水重结晶，得棒状食品级N-乙酰氨基葡萄糖。

Appearance and Properties:A colorless,hydroscopic,oxidative crystal,is soluble in water,dissolves in ethyl alcohol,and is slightly soluble in ether.

性状：无色结晶。

The control effect of ethyl alcohol and SO〓 on the morphology and crystalline phase composition of hydrous TiO〓 particles by thermal hydrolysis have been studied.

研究了乙醇和SO〓对TiCl〓水溶液加热水解生成的水合TiO〓粒子的形貌和晶相组成的调控作用。

By analyzing and researching the corrosion resistant mechanism of adsorption typal acidification corrosion inhibitor, taking single equational experimental method, making use of mannich reaction and using the hydrochloric acid as catalyst and the ethyl alcohol absolute as solvent, the new acidification corrosion inhibitor HZ-1 is synthesed by formaldehyde、hypnone、aromatic amines in the present research of this thesis.

本文通过对吸附型酸液缓蚀剂缓蚀机理的分析和研究，利用单因素实验方法，采用曼尼希反应，以盐酸为催化剂，无水乙醇为溶剂，用甲醛、苯乙酮、芳香多胺合成了新型酸化缓蚀剂HZ-1。

Results: This method eliminated the interference of the imfluence of ethyl hydroxybenzoate, such as hypsochromic shift of wave and a bit higher of the results. The average recovery was 99.31%, RSD=0.68%(n=6). Conclusions: This method was simple, fast and accurate, and was suitable for improving the original criteria.

结果：排除了羟苯乙酯对甲硝唑造成的波长短移，使结果偏高等干扰，平均回收率为99.31%，RSD=0.68%(n=6)结论：本测定方法简便，快速，准确，可用于改进原标准的含量测定方法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。