查询词典 aldehyde hydrate

Citral is an extremely important aliphatic acyclic terpene aldehyde and, because of its unusual structure, it possesses properties which are of interest both from an academic and a practical viewpoint.

由于其特殊的结构，因此柠檬醛的性质无论从学术或实用的角度来看，都很重要。

The rectification device provided to Dexinhang Essence/Spice Company by us is not only used for the production of 97% natural citral, but also for separating out more than 98% natural cinnamic aldehyde and the production of other natural and compound essence with a good versatility.

此套装置在国内已在多家香料企业投产，收到良好的效果。公司设计的分馏设备注重其通用性，一套装置可生产多个品种，性价比好。

The reason is that驱蚊草contains a special "small raw materials", the use of transgenic technology, will have the mosquito genome - the genetic structure of implanted Citronellal "vanilla", using their own unique delivery system as a vector to Shannon Mao aldehyde substances released into the air stream.

原因是驱蚊草含有一种特别的"小原料"，其采用转基因技术，将具有驱蚊基因——香茅醛基因结构植入"香草"，利用其自身独有的释放系统作为载体，将香茅醛物质源源不断释放于空气中。

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

一种带渗透性气味的液体醛，用植物外壳和玉米芯制取，用于制呋喃或用作溶剂。

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。

The presence of high temperature, middle oxidizer and dissolved oxygen oxidized alcohol into aldehyde and acetic acid; decompound of ester was concomitant with esterification.

此外，蒸馏过程中还发生物质的分解，由于高温、中间氧化剂和溶解氧的存在，使酒精氧化成乙醛和乙酸，酯化作用的同时发生酯的分解。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。