查询词典 aliphatic

The influence of different modifier contents,n∶n,reaction temperature and reaction time on aliphatic aqueous dispersion of blocked polyisocyanate were discussed while using methyl ethyl ketoxime as blocker and monohydroxyl poly as hydrophilic modifier.

以甲乙酮肟为封闭剂，以单羟基聚环氧乙烷为亲水改性剂，分别考察了不同改性剂用量、n∶n、反应温度、反应时间对脂肪族水分散封闭型多异氰酸酯合成的影响。

-3-Alkenoic acids were synthesized by Knoevenagel reactions of aliphatic aldehyde s with malonic acid in xylene under reflux.

以脂肪醛与丙二酸为原料，通过Knoevenagel反应制备了-3-烷烯羧酸，反应以二甲苯为溶剂，在回流条件下进行。

1H-NMR and UV analysis show that, after reaction, benzene ring in the structure unit of the alkali lignin is steady, carboxyl, carbonyl and methoxyl all have reduced in different extent, while aliphatic and phenol hydroxyl have increased.

1H-NMR和UV光谱分析显示反应后碱木质素的结构单元中苯环结构稳定，羰基、羧基、甲氧基有所减少，醇羟基和酚羟基的量增加了。

In that condition, the total hydroxyl, aliphatic and phenol hydroxyl are 15.69%, 11.45% and 4.24%, increasing 158.06%, 310.40% and 28.86% separately;while the methoxyl has reduced from 13.85% to 10.14%.

运用扫描电子显微镜对Pd/C催化剂的微观形貌进行了表征，对失活的Pd/C催化剂进行了回收再利用，并初步探讨了催化剂失活的原因。

The composition of the invention comprises: about 80 to about 99 weight percent lubricant; and about 1 to about 20 weight percent sodium or potassium alkali metal salt of a branched or unbranched aliphatic monocarboxylic acid having at least 8 carbon atoms.

本发明的组合物包括：大约80-99%重量的润滑剂；以及大约1-20％的具有至少8个碳原子的支链或非支链脂肪族一元羧酸的碱金属盐。

The two major categories are aliphatic, with the carbon atoms in straight or Branched chains or in nonaromatic rings, and aromatic

烃主要的两种类型是脂肪类和芳香类。。脂肪烃中的碳原子排成直线或分支的链，或者结成非芳香族的环。

The two major categories are aliphatic, with the carbon atoms in straight or branch ed chains or in nonaromatic rings, and aromatic

烃主要的两种类型是脂肪类和芳香类。。脂肪烃中的碳原子排成直线或分支的链，或者结成非芳香族的环。

The two major categories are aliphatic, with the carbon atom s in straight or branched chains or in nonaromatic rings, and aromatic

烃主要的两种类型是脂肪类和芳香类。。脂肪烃中的碳原子排成直线或分支的链，或者结成非芳香族的环。

In the presence of suitable nickel catalyst and without the chelation effect of special designed dithioacetals, simple aliphatic dithioacetals could react with a series of Grignard reagents to give the corresponding olefinic products.

因此在适当的镍触媒存在下，脂肪族硫缩醛在不需要特别的螯合作用下，即可以与一系列的格林那试剂进行烯化反应。

Assignments have been made on the spectra for all peaks of the Aliphatic and olefinic carbons using chemical shift corrective terms together with furukawa parameters.

本工作用~(13)C-NMR进行了研究，得到的聚合物的~(13)C-NMR图谱表明，聚合物的脂碳部分共有十一个共振峰，烯碳部分有九个峰。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。