查询词典 stearic

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。

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。

Stearic acid, stearic amide and their mixtures were investigated by differential scanning calorimetry at a heating/cooling rate of 5K/min.

相变材料是解决能源供需矛盾的一类新型的清洁廉价能源；硬脂酸、硬脂酰胺均为廉价易得的化工产品。

The results showed that the proportion of water and ethanol, the guar gum, the stearic acid all had a greater influence on the property of synthetic film. The optimum filming conditions were: soy protein isolate 5.0%, the proportion of water and ethanol 80:20, guar gum 0.25%, stearic acid 0.3%.

研究结果表明：水与乙醇的体积比、瓜尔豆胶含量、硬脂酸含量对复合膜的性能有较大影响，制备大豆蛋白复合膜技术条件为，大豆分离蛋白浓度为5.0%，水与乙醇体积比为80：20，瓜尔豆胶加量为0.25%，硬脂酸加量为0.3%。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。