查询词典 esters

Nerve agents such as Sarin, Tabun and Soman are parts of organic phosphorus esters to which organophosphorus pesticide belong.

神经性毒剂沙林、塔崩、梭曼与有机磷类农药敌敌畏等同属于有机磷酸酯类化合物。

Examples of suitable polar volatile liquid are amines ethers especially lower alkyl ethers organic acids esters ketones glycols alcohols amides ureas sulphoxides sulphones and water.

合适的极性挥发性液体的例子有胺，醚，尤其是低级烷基醚，有机酸，酯类，酮类，乙二醇，乙醇，酰胺，尿素，sulphoxides，砜和水。

The recent application of thionly chloride in organic synthesis is reviewed, mainly focusing on the preparation of chlorinated compounds, alkenes, esters, amides, nitriles, cyclic sulfites and sulfinyl chlorides.

综述了近年来氯化亚砜在有机合成中的应用进展，主要涉及氯代化合物、烃、及酰胺、、式亚硫酸酯、磺酰氯等化合物的制备。

Waxes used as extrusion plastic additives, primarily in the production of extruded plastic products, include petroleum waxes, polyethylene waxes, Fischer-Tropsch waxes, metallic stearates, fatty acid amides, and fatty acid esters.

蜡产品用作挤塑添加剂，主要用于挤出塑料产品，有石油蜡、聚乙烯蜡、费-托蜡、金属化硬脂酸盐、脂肪酰胺和脂肪酸酯。

Reaction of the insertion adducts with epoxide s and α,β unsaturated esters in THF HMPA afforded the corresponding unsymmetrical selenides, respectively.

硒插入芳基锌的C—Zn键产生对应的芳基硒化锌，它与环氧或α，β不饱和酯在温和的条件反应生成对应的不对称的硒醚

In this dissertation, preparation of polysubstituted ethene and heterocyclic compounds based on 2-hydroxyalkyl phenyl selenides andα-phenylselenopropionic acid reagents were further investigated as follow: Firstly, O-ethyl-O-vinyl phosphonates were prepared in a one-pot, two-step transformation by Mitsunobu reaction of 2-hydroxyalkyl phenyl selenides with monoethyl esters of phosphonic acid in the presence of diethyl azodicarboxylate and triphenyl phosphine (PPh3) followed by oxidation-eliminatio...

中文摘要：本文主要进一步探索了2-羟基烷基苯基硒醚、α-苯硒基丙酸试剂在制备多取代乙烯和杂环化合物反应中的应用，具体研究内容和结果如下：一、在偶氮二羧酸乙酯和三苯膦(PPh3)存在下，苯基-2-羟基烷基硒醚和O-乙基膦酸单酯发生Mitsunobu反应，无需分离和纯化反应中间体，直接使用30 %的双氧水进行氧化-消除反应，提供了&两步、一锅&合成O-乙基-O-乙烯基膦酸酯的新方法，该方法反应条件温和，操作简便，产物收率良好(76-82 %)。

Ingredients: Thayers' Proprietary blend of Witch Hazel with Aloe Vera, Calendula, Peppermint, Eucalyptus, Camphor, Clove, Menthol Esters, Purified Water, Natural Grain Alcohol 20

成分：Thayers混合了萃取自芦荟的金缕梅，金盏花，薄荷油，桉树，樟脑，丁香，薄荷醇脂，纯净水，天然酒精

Trizolones, pyrroles and oxazines are synthesized by using carbamic esters as initiative materials.

本文提供了合成1，2，4-三唑酮—5衍生物的三种方法，共合成22种化合物，其中7种未见文献报道。

This article mainly describes the relation between the structure and properties of a series fatiliquors which are the products made from oxidated and sulfited of oleic acid esters , and this relation can provide theory basis for the developing of fatiliquor agent and leather making.

研究了 5种油酸醇酯的氧化亚硫酸化产品的结构与皮革加脂特性之间的关系，这种相关性规律可为皮革加脂剂的开发研究和制革加工的选用提供理论依据。

Sugar esters are nonionic surfactants. Because of their amphiphilic nature, they are widely used in pharmaceutical, food and cosmetic industries.

糖酯作为一种非离子型表面活性剂，由于特殊的两亲结构，已广泛应用于医药、食品及化妆品工业。

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。