查询词典 trimethyl

Molybdic acid aggregates were prepared by the reaction of ammonium molybdate with HNO_3 and HCl in a coexisting HAc or cetyl-trimethyl ammonium bromide solution,respec- tively.

钼酸铵在醋酸和十六烷基三甲基溴化铵调节下分别与硝酸和盐酸反应制备了多钼酸聚集体。

Ingredients:Rose extract,cetearyl alcohol, dimethyl silicone oil, glycerol, octadecyl trimethyl ammonium chloride.

成分：玫瑰提取液，十六十八混合醇，二甲基硅油，甘油，十八烷基三甲基氯化铵。

Ingredients:olive extract,cetearyl alcohol, dimethyl silicone oil, glycerol, octadecyl trimethyl ammonium chloride.

成分：橄榄提取液，十六十八混合醇，二甲基硅油，甘油，十八烷基三甲基氯化铵。

In this paper, SiO_2-based air-water interfacial films with nano structure are templated by cationic surfactant cetyl trimethyl ammonium bromide with tetraethyl orthosilicate as precursor.

本文以正硅酸乙酯为前驱体、以十六烷基三甲基溴化铵为模板，用自组装的方法在特殊的区位——空气—水界面上制备了SiO_2的无机纳米薄膜。

The calculated results indicate that the energy bathers for the formation of dimethyl ether and trimethyl oxonium ion inside HSAPO-34 zeolite are 1.68 and 0.93 eV, respectively. The suggested intermediate oxonium ylide is very unstable and the energy barriers for the formation of C-C bond are over 3.0 eV by concerted pathway.

结果表明，二甲醚和三甲基氧鎓离子在HSAPO-34分子筛上的生成能垒分别为1.68和0.93eV，中间体氧鎓叶立德不能稳定存在，同时表明C-C键通过协同反应形成的能垒均超过3.0ev。

The graft copolymerization of acryalmide and methyl acrylacyl oxyethyl trimethyl ammonium chloride onto chitosan under microwave radiation was studied. The effect of synthesis conditions on graft ratio and graft efficiency, on the strengthening efficacy of the product for wheat straw pulp was studied.

摘 要：研究了用微波辐射的方法进行壳聚糖和丙烯酰胺及甲基丙烯酰氧乙基三甲基氯化铵的接枝共聚反应，讨论了反应条件与产物的接枝效果对麦草浆的增强作用的影响。

To obtain a flocculant which could effectively remove dyes from dyeing wastewater , the amphoteric polymer was prepared by copolymerization of acrylamide, acrylic acid, cationic monomer and dmethyldiallylammonium chloride or acryloyl oxyethyl trimethyl ammonium chloride.

为制备一种对染色废水有显著脱色效果的絮凝剂，采用溶液聚合法，将两种阳离子单体二甲基二烯丙基氯化铵和丙烯酰氧乙基三甲基氯化铵分别与丙烯酰胺，丙烯酸共聚，合成了两性聚合物。

Methods for synthesizing of pinacol are reviewed,the difference of catalytic effects and stereoselectivity with various catalytic systems are introduced in this paper.Highlights are laid on the mechanism and stereoselectivity of new synthetic methods catalyzed by low valent Samarium, Titanium and Trimethyl chlorosilane, etc.

频哪醇合成新进展* The Recent Progress in the Synthesis of Pinacol 李有桂蒋昌盛尤田耙**(中国科学技术大学化学系合肥 230026)本文综述了合成频哪醇的方法，介绍了不同催化体系的催化效果和立体选择性的差异，着重介绍了低价钐、低价钛、三甲基氯硅烷等新的合成频哪醇反应的机理和立体选择性。

A method for the micro determination of germanium by flow injection－spectrophotometry with CCD diode array detector is reported, based on the color reaction between germanium and salicyl fluorone in the presence of cetyl trimethyl ammonium bromide. A good linear relationship was obtained in the range of 0～3.0 mg/L for germanium.

研究了在溴化十六烷基三甲铵存在下，锗与2，3，7－三羟基－9－水杨基荧光酮－6的显色反应，采用二极管阵列检测器，建立了检测微量锗的流动注射分光光度法。

Ingredients: Water,Stearyl Trimethyl Ammonium Chloride,Cetearyl Alcohol,Cetyl Alcohol,Amodimethicone,Rosa Rugosa Flower Extract,Cyclomethicone,Dimethicone,Hydroxyethyl Cellulose,Hydrolyzed Keratin,Hydrolyzed Wheat Protein,Parfum,Methyl Paraben,Propyl Paraben,Methylchloroisothiazolinone Methylisothiazolinone,Citric Acid.

成分：去离子水，十八烷基三甲基氯化铵，鲸蜡硬脂醇，鲸蜡醇，氨二甲基硅氧烷，玫瑰花提取液，环甲基硅氧烷，聚二甲基硅氧烷，羟乙基纤维素，水解角蛋白，水解小麦蛋白，香精，对羟基苯甲酸甲酯，对羟基苯甲酸丙酯，凯松，柠檬酸。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。