查询词典 polymorphic modification

With the deepening of hydrophobic modification,the dispensability of modified starch in organic solvent liquid paraffin is markedly enhanced. The particle shape changes from rarefaction to cluster grape ball agglomeration state. The long chain group of methoxyl silane coupling agents KH570 is linked with the anhydrous glucose units of the cross-linked starch.

随着疏水化改性程度的加深，改性淀粉在液体石蜡有机介质中的分散性明显增强；颗粒形态由疏松态向串状葡萄球团聚态转变；在交联淀粉脱水葡萄糖单元羟基上引入了甲氧基硅烷偶联剂KH570的长链基团。

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。

Detection of the source can be a normal directory, and change the file modification, reproduction.

详细说明：这个源码可以正常检测目录，并且对改动的文件进行修改，复制。

Meanwhile, XRD, IR and SEM methods were used to characterise the structure of the sample, and the mechanisms of modification were discussed.

同时还利用XRD、IR和SEM等分析方法测试了改性前、后叶蜡石粉体的结构，并探讨了叶蜡石的活化机理。

The abnormal DNA modification is characteristically a hallmark of cancer cells.

DNA 变体的异常是癌细胞的一个典型标志。

Overall responsible for the designing and modification of air conditioning product such as air handling unit and chiller,etc.

负责公司技术部及部门下属的管理工作； 2。全面负责产品的设计及改造工作； 3。

This review has a closer look at chemical modification of chitin and chitosan.

为此，甲壳素和壳聚糖的化学改性成为该材科研究的重要方向之一。

It has recently reported that chromatin modification plays an important role in regulation of gene expression.

近年研究发现，染色质修饰在基因表达调节中起重要作用。

The melting speed, overheat temperature, pouring temperature and modification in production of high chrome cast iron were studied.

对高铬铸铁的熔炼速度、过热温度、浇注温度及变质处理进行了研究。

Objective To seek for a suitable chamical agent for surface modification of chrysotile.

目的 寻求一种适宜的石棉表面改性剂。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。