查询词典 acetic aldehyde

Objective To investigate the synthesis methods Veratrum aldehyde and to study the synthesis of microwave radiation of the advantages and disadvantages of this new approach, to provide guidance for the production of meaning.

目的 考察合成藜芦醛的方法，并研究微波辐射合成这种新方法的优缺点，为生产提供指导意义。

To be successful, a crucial selectivity problem in the conversion of aldehyde 4 to aldol 3 had to be understood and solved.

要取得成功，关键选择性问题转化为乙醛醛34已被理解和解决。

According to the properties of bio-oil, converting carboxyl acid and aldehyde through esterification and aldolization have great potential.

根据生物油中化学组成的特点，将极性基团转化为稳定的非极性基团的化学改性方法是生物油改性具有潜力的发展方向。

When adding dianion 5 to aldehyde 4 and using the molar ratios of entry 1, the yield of aldol 3 dropped from 98% to 86%, and 7% of alcohol 7 was formed.

当加入醛酸根5比4，用摩尔进入一日产量3醛从98%下降到86%，而77%的酒精组成。

The connection was tried in three different ways: Aldol reaction, coupling of sulfone and aldehyde, the Umpolung.

尝试三种不同的方法来进行两个片段的偶联。试验了Aldol反应，砜基与醛的偶联反应和极性反转的方法。

We examine the asymmetric Aldol reaction with cyclohexanone and aldehyde using tunable and bifunctional organocatalysts in aqueous media.

相反，尽管在盐水溶液中的反应效果可以比在水中的效果要好，但是较少有使用盐水溶液作为反应介质的报道。

The brown color of lecithin is largely the result of heathing the oil during solvent stripping and is to be the result of an aldehyde-amine reaction or aldol condensation.

大豆磷脂中的褐色物质可能是毛油在汽提时生成的，据认为是缩醛产物。

Results showed that the alkynol compounds were transformed to the corresponding alkyne aldehyde and acetylenic acid compounds containing conjugated system on the nickel anode, and hence the anodic oxidation reaction products were able to generate ultraviolet absorption.

结果表明，炔醇类化合物在阳极生成了相应的有共扼体系的炔醛类和炔酸类化合物，产生了紫外吸收。

The resin was used as a selective oxidant for oxidation of allyl alcohol to allyl aldehyde.

合成了铬酸氢根季铵盐树脂，以它作为一种选择性氧化剂应用于烯丙醇的氧化反应，考察了温度、时间、溶剂、树脂与醇的物料比对氧化反应的影响。

The left lens of Anuran Tadpole - Bufo Raddei Strauch Tadpole and Xenopus laevis Tadpole were removed when they had posterior limb bud. By decapitating and fixing it with Carnoy's fixation fluid in different days, by means of paraffin serial section and Hematoxylin-Eosin stain and by using the microscope to observe the microstructure of lens regeneration of Bufo Raddei Strauch Tadpole and Xenopus laevis Tadpole. By extirpating the left eye and fixing it with aldehyde and osmium acid , by using electron microscope to observe the ultrastructure of lens regeneration of Bufo Raddei Strauch Tadpole and Xenopus laevis Tadpole.

以无尾两栖类—以花背蟾蜍与非洲爪蟾后肢芽期蝌蚪为实验材料，摘除其左眼晶状体，在再生不同时期固定，石蜡连续切片，苏木精-伊红对染，光镜观察，研究晶状体再生的组织来源；另外，选再生不同时期材料用戊二醛，锇酸固定，透射电镜观察，以研究晶状体再生组织的超微结构变化。

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。