查询词典 acetic aldehyde

Aldehyde with a penetrating odor; made from plant hulls and corn cobs; used in making furan and as a solvent.

气味的液体醛，用植物外壳和玉米芯制取，用于制呋喃或用作溶剂。

This one couplet produces technology, the liquid waste that solved phenolic aldehyde colophony to produce a business thoroughly arranges an issue.

这一联产工艺，彻底解决了酚醛树脂生产企业的废水排放新问题。

A method for determinating the activities of pectinase was proposed in this paper. It can produce the red-brown amino compounds when 3,5-dinitrosalicylic acid and aldehyde were heated together. The amino compounds had maximum absorbency at 540nm. In certain range, there was a good linear relationship between the amount of reducing sugar and the color of the reaction mixture.

针对QB1502-92标准测定方法测定高活力果胶酶、固定化果胶酶活力存在的实验误差大，重现性及灵敏度差的缺陷，提出了利用3，5-二硝基水杨酸与醛糖共热产生棕红色的氨基化合物，在一定范围内还原糖的量和含有呈色氨基化合物的反应液颜色深浅成正比的原理，在540nm下测其吸光度，从而计算出果胶酶活力的测定方法，并对测定步骤、影响因素及测定中可能出现的问题进行了试验研究。

Their structures were characterized as dihydroconiferyl dihydro-p-coumarate, vanillin, apocynin, p-hydroxybenzaldehyde, syringaldehyde, syringic acid, syringylethanone,α-hydroxypropiosyringone, coniferyl aldehyde, dihydroconiferyl alcohol, 2-hydroxyphenylpropanol, and 3-hydroxy-4-methoxy-phenylethanol, respectively.

结果 从该植物中分离得到12个酚性化合物，其结构分别为二氢松柏醇二氢对羟基桂皮酸酯，香草醛，罗布麻宁，对羟基苯甲醛，丁香醛，丁香酸，丁香乙酮，α-羟基丁香丙酮，松柏醛，二氢松柏醇，2-羟基苯丙醇和3-羟基－4-甲氧基苯乙醇。

The preparation of polymer is required for high purity of glycolic acid, if not, low-weight polymer is obtained, therefore, high purity glycolic acid is scarce in the market. So, the research for the synthesis of glycolic acid is essential. In domestic and overseas, there are many methods for preparation of glycolic acid, including glycin oxidation, cyanogenesis, aldehyde oxidation, coupling of maldehyde and methyl formate, oxalic acid electrolysis, chloroactic acid hydrolysis and so on.

制备羟基乙酸的聚合物时，对羟基乙酸单体的纯度要求较高，否则得到的聚合物分子量较低，导致高纯度羟基乙酸的需求量逐年增长，目前在国内，高纯度的羟基乙酸还没有形成工业化规模生产，对羟基乙酸的合成进行研究是非常有意义的。

Under the condition of Gasi Oilfield, the formulation of motive polymer gel were as follows: 1500mg/L polymer HPAM + 400 mg/L organic phenolic aldehyde + 150mg/L stabilizer and 80 mg/L deoxidant.

在尕斯油田油藏条件下，研制出的可动凝胶配方体系为：1500mg/L聚合物HPAM+400mg/L有机酚醛+120mg/L稳定剂+80mg/L除氧剂。

Pinacol reductive coupling reaction of aldehyde and ketone is one of the most important methods in forming C-C bond, which may also produce vicinal diol as valuable intermediate compound applied in the synthesise of natrual products.

醛酮的Pinacol还原偶联反应是合成C—C键的重要方法之一，同时合成的邻二醇类化合物是重要的有机合成中间体，已被应用于许多含有邻二醇结构的复杂天然化合物总合成中。

Brandy quality could be evaluated through the measurement of pH value, total phenol, colority, catechin, aromatic aldehyde and aromatic acids, Cu content, flavoring compositions, Einstein shift in ultraviolet spectrum, and non-alcohol volatile substances content in Brandy.

可通过测定白兰地的pH、总酚、色调以及儿茶素；芳香醛及芳香酸类物质；紫外光谱的"红移"现象；白兰地中的铜；白兰地中的香气成分；非酒精挥发物总量来评价酒质量。

Aldehyde dehydrogenase is a kind of endoenzyme and cell-breaking is one of the key procedures in the extraction of ALDH from S. cerevisiae.

乙醛脱氮酶是一种胞内酶，在从酵母中分离提取ALDH的过程中，破碎细胞是其中的关键步骤之一。

Aldehyde dehydrogenase is a kind of endoenzyme and cell-breaking is one of the key procedures in the extraction of ALDH from S.cerevisiae.

乙醛脱氢酶是一种胞内酶，在从酵母中分离提取ALDH的过程中，破碎细胞是其中的关键步骤之一。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。