查询词典 ethyl acetate

Radiation-induced grafting of binary vinyl monomers of styrene/maleic anhydride, St/dimethylamino ethyl methacrylate and St/vinyl acetate onto cotton cellulose was carried out by γ-radiation from a 60Co source at room temperature under nitrogen.

在氮气气氛下用γ射线辐照的方法在棉纤维上接枝苯乙烯/马来酸酐、苯乙烯/甲基丙烯酸二甲胺乙酯、苯乙烯/醋酸乙烯酯二元单体。

Radiation-induced grafting of binary vinyl monomers of styrene/maleic anhydride, St/dimethylamino ethyl methacrylate and St/vinyl acetate onto cotton cellulose was carried out by γ-radiation from a 60Co source at room temperature under nitrogen.

闫宇，伊敏，彭金粉，翟茂林*，哈鸿飞摘要：在氮气气氛下用γ射线辐照的方法在棉纤维上接枝苯乙烯/马来酸酐、苯乙烯/甲基丙烯酸二甲胺乙酯、苯乙烯/醋酸乙烯酯二元单体。

Two synthetic routes starting from 1,3-dihydroxyacetone and formamidine acetate as well as imidazole-4,5-dicarboxylic acid as starting material were investigated, and the reductive reaction of ethyl imidazole-4-carboxylate was also investigated.

本文对以1，3-二羟基丙酮和醋酸甲脒为原料和以4，5-二羧酸咪唑为原料合成4(5)-羟甲基咪唑的两条工艺进行了研究并优化，同时对4(5)-羧酸咪唑乙酯的还原反应进行了探索性实验。

Dihydroxyacetone; formamidine acetate; imidazole-4,5-dicarboxylic acid; optimizing process; ethyl imidazole-4-carboxylate; reductive reaction; 4(5)-hydroxymethylimidazole

关键字或关键词组： 1，3-二羟基丙酮；醋酸甲脒；4，5-二羧酸咪唑；工艺优化；4(5)-羧酸咪唑乙酯；还原反应；4(5)-羟甲基咪唑

A method for synthesizing sodium sulfoacetic is discussed,which sodium sulfoacetic is synthesized with sodium sulfite and ethyl monochloro acetate,with sodium sulfite and chloroacetic acid.

主要分别介绍用亚硫酸钠与氯乙酸乙酯合成磺酸乙酸钠和亚硫酸钠与氯乙酸合成磺酸乙酸钠。

In the presence of catalytic rhodium acetate, ethyl 2-diazo-3-oxo-per fluoroalkanoates, reacted readily with nitriles to give a series of 5-fluoroalkyl substituted 1, 3oxazoles with high regio-selectivity through a metal carbenoid intermediate. The reactions of carbenoids with noncyclic vinyl ethers or cyclic vinyl ethers afforded dihydrofuroates in good to excellent yields. Interestingly, only vinyl C-H insertion compound was obtained concerning of the reaction of carbenoids with 2, 5dimethylfuran due to the steric hindrance of methyl group

醋酸铑分解2-重氮-3-氧代-全氟羧酸乙酯形成的金属卡宾作为1，3-偶极体，可以与一系列芳基或烷基取代的腈反应，高度区域选择性地生成一系列4-乙氧羰基-5-氟烷基取代的噁唑化合物；也可以与富电子的链状和环状的烯基醚反应，以优良的产率得到一系列氟烷基取代的二氢呋喃类化合物；而与2，5-二甲基呋喃的反应，由于甲基的位阻作用，只得到金属卡宾对呋喃3-位烯基碳氢键插入产物。

The antibacterial activity of acetate ethyl in the root bark of Chinese sapium was investigated.

［目的］研究乌桕根皮乙酸乙酯部位的抑菌活性。

Contains: Deionised Water, Mineral Oil, Glycerine, Stearic Acid, Cetearyl Alcohol, Triethanolamine, Carbomer, Lanolin, Tocopherol Acetate, Fragrance, Propylene Glycol, Methyl Paraben, Ethyl Paraben, Butyl Paraben, Isobutyl Paraben, Propyl Paraben, Disodium EDTA.

成分：离子水，矿物油，甘油，硬脂酸油脂剂，棕榈醇乳化剂，三乙醇胺酸碱值调节剂，稳定乳化剂，绵羊油，维生素E，香料，丙烯甘醇保湿剂，甲基木精胶，乙酯，丁酯，尼泊金异丁酯，丙酯，稳定剂缓冲剂。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。