查询词典 stearic acid

Starch esterification was proceeded with native cassava starch and three saturated free fatty acids: capric acid (C10:0), myristic acid (C14:0) and stearic acid (C18:0). The fatty acid modified starch was prepared by using lipase PS as the catalyst.

中文摘要本研究以天然树薯淀粉为反应基质，与三种不同链长饱和脂肪酸羊蜡酸(C10：0、肉豆蔻酸(C14：0)与硬脂酸(C18：0)分别於水相及有机相行酯化反应，并且以工业中常用的脂肪水解酶lipase PS催化酯键合成，可得脂肪酸修饰淀粉(fatty acid modified starch， FAMS)。

The results indicate that improving temperature to reflux, using low polarity solvent as dispersion medium and proper molar ratio of tetrabutyl titanate to stearic acid can bring out good modification. The function of tetrabutyl titanate is to react with the surface hydroxyl groups and adsorbed H2O on the powder particles to produce new binding sites such as M—O—Ti—OC4H9and M—O—Ti—OH, which can easily react with the carboxylic acid. As temperature increases from room temperature to reflux temperature, the reactions between RCOO- and Ti change from coordinate bonds to covalent bonds, which makes the carbon chains of stearic acids more strongly bound with the powder particles surface.

研究结果表明，提高处理温度、适当增加复合改性剂中硬脂酸的量并选用极性弱的有机溶剂可达到比较理想的改性效果；钛酸四丁酯的作用是与粉体粒子表面的羟基以及吸附水反应产生偶联点，如M—O—Ti—OH，这些偶联点易于与羧酸反应；在低温时RCOO-与偶联点的Ti之间以配合物的形式发生作用，在回流温度下处理时，主要发生酯化反应，使硬脂酸更牢固地嫁接到粉体粒子表面，改性效果更好。

The molecular length of stearic acid has been extended by bounding with PE-g-MAH.The tensile properties of composite plastic have been increased greatly depending on the intertwist between enlarged stearic acid and HDPE ...

PE-g-MAH的进一步嫁接作用，可延长硬脂酸分子链，加强硬脂酸和基体树脂之间的缠结作用，从而显著提高了复合塑料的拉伸强度。

The molecular length of stearic acid has been extended by bounding with PE-g-MAH. The tensile properties of composite plastic have been increased greatly depending on the intertwist between enlarged stearic acid and HDPE matrix.

PE-g-MAH的进一步嫁接作用，可延长硬脂酸分子链，加强硬脂酸和基体树脂之间的缠结作用，从而显著提高了复合塑料的拉伸强度。

Use this unique science and technology in acid of tristearin of Lipidic Chain on, but firm DNA develops efficient " drop to drip in skin surface layer reborn " maintains wet system function, of your skin fill wet reach protective function to produce optimal effect.

将此独一无二的科技应用在Lipidic Chain(stearic acid硬脂酸)上，可稳固DNA在肌肤表层发挥高效的%26quot；滴滴更生%26quot；保湿系统功能，令肌肤的补湿及保护功能发挥最佳作用。

The assemblies of the C60 mixed film and the behenic acid film were made successfully by means of Langmuir-Blodgett technique with BA, arachic acid, stearic acid and octadecanyl amine as the assistant material, and the reorganization of the LB films was directly observed by liquid atomic force microscopy.

利用Langmuir-Blodgett方法，以二十二酸(behenic acid， BA)、二十酸(arachic acid， AA)、十八酸(stearic acid， SA)和十八胺(octadecanyl amine， OA)作为辅助成膜材料，组装了C60复合膜和BA膜，液下原子力显微镜直接对LB膜在水相中的重组进行观察。

This desaturase, when expressed in Escherichia coli, desaturated stearic acid to yield oleic acid, but did not desaturate other fatty acids in E. coli. These results indicate that PvFadA is specific to stearic acid.

通过将PvfadA基因在大肠杆菌表达系统中成功表达，PvFadA可以特异性地将C18：0脂肪酸转变成C18：1脂肪酸。

The structure、action principle and modification's key technology of water talc was summarized in this paper, it make a comparison of heat stability and cooperation stability of modify talc、stearic acid Calcium、stearic acid Zinc、stearic acid barium and tribasic salt in the PVC system.

介绍了改性水滑石的结构、作用机理及改性的关键技术，并比较了改性水滑石、硬脂酸钙、硬脂酸锌、硬脂酸钡、三盐在PVC体系中的热稳定性能以及协同稳定性能。

The structure、action principle and modification's key technology of water talc was summarized in this paper, it make a comparison of heat stability and cooperation stability of modify talc、stearic acid Calcium、stearic acid Zinc、stearic acid barium and tribasic salt in the PVC system.

改性水滑石；钙锌稳定剂；应用；环保介绍了改性水滑石的结构、作用机理及改性的关键技术，并比较了改性水滑石、硬脂酸钙、硬脂酸锌、硬脂酸钡、三盐在PVC体系中的热稳定性能以及协同稳定性能。

During the preparation, when the water was used as solvent, the sodium stearate is dispersed by the acid-base neutralization reaction between sodium silicate and stearic acid in water solution, and is encapsuled by the reverse reaction; while when the alcohol/water mixed solution was used, the dispersion and encapsulation of the stearic acid is accomplished via esterification and hydrolysis in alcohol/water solvent.

具体为：以水为溶剂时，利用十八烷酸与水玻璃间发生的酸碱正反应解决其分散问题，而利用其逆反应完成相变材料的包裹，以乙醇／水为混合溶剂时，则利用其酯化、水解双向反应分别完成十八烷酸的分散、包裹过程。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了