查询词典 esters

The change rules of total esters and total acids in Luzhou-flavor liquor of different alcoholicity and of different grades during storage were studied and the related inflluencing factors were investigated.

研究了不同酒度、不同等级的浓香型白酒在贮存过程中的总酯、总酸的变化规律以及影响因素。

On the basis of analyzing data about stearic acid triethanolamine ester quaternary's preparation process and methods of analysis and identification, this article summarized synthetic conditions for this quaternary ammonium salt, this synthetic condition composed by synthesis of esters and quaternary ammoniation.

在对有关硬脂酸三乙醇胺酯季铵盐的制备工艺、分析鉴定方法的资料分析的基础上，综述了由硬脂酸制备该季铵盐的工艺条件，该工艺条件由酯胺的合成和季铵化2步构成。

Waste minimization in ammonolysis process of O,O-dimethylphosphorochloridothioate;2. An Investigation on the Micelle-Catalytic Hydrolysis and Ammonolysis of Carboxylic Acid Esters;3. The final product is generated by ammonolysis of the compound under high pressure.

以4-溴-1，8-萘酐为原料，用2，4-二甲基苯胺在醋酸中与之反应得到N-2′，4′-二甲基苯基-4-溴-1，8-萘酰亚胺，然后将NDNA在高压下用氨水进行氨解得到最终产品。

For the synthesis of NHC precursors, there are also several routes: condensation of glyoxal, amines and paraformaldehyde; alkylation of imidazole or monosubstituted imidazole with alkyl halide; annulation of ortho esters and 1,2-diamines; ring closure of hydrazines or amides with acetic anhydride; reduction of thiones with Na/K in THF.

关于N-杂环卡宾前体的合成途径主要有：乙二醛、伯胺和多聚甲醛的缩合反应；卤代烷与咪唑及其取代咪唑的烷基化反应；原甲酸酯与1，2-二胺的成环反应；肼或酰胺与酸酐的环化反应；用Na/K对环硫脲化合物的还原反应。

A new series of short range donor acceptor systems consisting of anthracene and different substituted benzoic esters were synthesized.

设计合成了一类以蒽为电子给体，带不同吸电子取代基的苯为电子受体的新型短程有机电子给体受体体系。

This article reviewed the current situation of the MAS of aromatic esters and prospected its future development.

该文综述了微波辅助合成芳香酯的研究进展，并展望了微波技术在芳香酯合成中的发展前景。

In the part Ⅲ, we synthesized same aryl acid esters by 〓 catalyst system, and found that this system can be used to industrial procedure widely.

第三部分，我们对〓复合催化芳香羧酸酯化的情况进行了探讨，发现了一个新型实用的催化体系，并具有较好的工业应用前景。

These models expounded the effect factors in the separation of azole antifungal agents and phosphonate esters on the CDMPC chiral stationary phase, and afforded as theoretic support for this kind of separating experiments.

这些模型从理论上阐述了这两类化合物在CDMPC上拆分过程中的影响因素，为这类手性固定相上的类似拆分实验提供了理论支持。

This catalytic system can be used in the preparation of a broad range of esters.

该催化剂适用于醛与多种底物醇的氧化酯化反应，尤其是对于一些长链饱和醇也有很好的催化活性。

Polar compounds, such as dihydro-alkyl furan-one, furandione, benzofuran, benzosazol, aldehydes and esters were also detected.

对部分极性化合物分析，检出了二氢烷基呋喃酮系列、呋喃二酮、苯并呋喃及少量醛类和酯类化合物。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。