查询词典 esters

It was found that a variety of α,β-unsaturated esters, amides, ketones and nitriles are all worked well to afford the cyclopropanation products in good yields.

研究了温度、碱的种类和用量、溶剂和添加剂等对反应的影响，给出较为适宜的反应条件。

Can with water, alcohol and ammonia reaction, difference generate acids, esters and amides, the reaction rate than the corresponding ester and anhydride fast.

可与水，醇和氨反应，分别生成酸、酯和酰胺，反应速度比相应的酯和酸酐快。

Fatty acid amides are next with consumption of 70 million pounds, followed by fatty acid esters at 60 million pounds, fatty acids at 15 million pounds and miscellaneous, 10 million pounds.

再其次是脂肪酰胺，用量是 3.18 万吨；脂肪酸酯的用量是 2.72 万吨，脂肪酸用量是 6803 吨，其它各种蜡的用量是 4536 吨。

They could be used not only to thesyntheses of amides and esters, but also to the syntheses of oligopeptides andbiologically active peptides, such as Leu-enkephalin, both in solution and the solid-phase.

这类缩合剂不仅可以用于酰胺和酯的合成，而且可以用于固、液相法合成小肽及生物活性肽，例如Leu-脑啡肽的合成。

Phosphate esters and anhydrides play important roles in the biosynthesis of protein, they act as the activators and carriers of amino acids in the biochemica reactions, and go away as the leaving groups after the formation of peptide bond.

磷酸酯及其酸酐在蛋白质的生物合成中起着十分重要的作用，它们充当了氨基酸的活化试剂和运输载体，当肽键形成后又作为离去基团离去。

The principal products of Huicheng are organic anhydrides, amines and esters which can be used for LED (light-emitting diode), OLED, coatings, pesticides, synthetic, etc.

公司主要致力于研发、生产有机酸酐、有机胺和酯类，产品用于发光二极管、有机发光显示器、涂料、农药和合成树脂等。

The binding energies assigned to each of these peaks is in accordance with the accepted value for these functionalities [18,28]. The O–C_O high energy binding peak may include anhydrides, esters, and carboxylic acid groups, if present. The C1s spectrum of the 40W films could be fitted with a minimum of 5 peaks according to the above notations, as shown in Fig.

装订 被指定给每一个这些峰巅的能源是符合那为这些功能性〔18，28 的一般承认的价值。O－C_O 高的能源装订山顶可能包括醋酐，酯，和含有羧基的酸聚集，如果呈现。40W 的 C1s 光谱电影可能根据配备有 5 的最小量峰巅到那在记号法上面，如图 3 A 所示。

Organic anhydrides are very important starting materials for organic synthesis, as they can give rise to carboxylic acids, esters, or amides under the proper conditions.

它们与水反应生成羧酸，与醇或酚反应生成酯，与氨和胺反应生成醯胺。

Asymmetric catalytic activity of chiral spiroborate esters,- or-1,1′-bi-2-naphthoxyboric acid-proline anhydride [-1 or-1], toward borane reduction of prochiral imine s has been ob- served.

手性螺硼酸酯-或-1，1'-联-2-萘酚硼酸--脯氨酸酐[-1或-1]对前手性亚胺硼烷还原的不对称催化活性被观察到。

Some organic insecticides are natural, such as rotenone, pyrethrins, and nicotine. Others are synthetic, such as chlorinated hydrocarbon s (e.g., DDT, dieldrin, lindane); carbamates, related to urea (e.g., carbaryl, carbofuran); and parathions, organic phosphorus esters.

有机的杀虫剂可能是天然的，如鱼藤酮、除虫菊和尼古丁；或是合成的，如氯代烃类(例如，滴滴涕、狄氏剂、林丹)、氨基甲酸酯，与尿素有关(如氨基甲醯、灭多虫和卡甲喃)、巴拉松、有机磷酸盐。

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。