查询词典 substitution

Emphasis is on substitution and elimination reactions and chemistry of the carbonyl group.

重点强调取代、消除反应和含羰基基团的化学性质。

In order to explore the relationship between structure and properties of hydroxyalkyl cellulose ether nitrate, molecular structures of nitrate ester of hydroxylethyl cellulose ether, nitrate ester of hydroxylpropyl cellulose and nitrate ester of cellulose glycerol ether with molar substitution of 1 were simulated by using Synthia module of Materials Studio, and their performances of nitrogen content, glass transition temperature and Young's modulus were predicted.

为探索羟烷基纤维素醚硝酸酯的结构与性能关系，借助Materials Studio软件中的Synthia模块模拟了摩尔取代度为1的羟乙基纤维素醚硝酸酯、羟丙基纤维素醚硝酸酯和二羟丙氧纤维素醚硝酸酯的结构，并预测了它们的含氮量、玻璃化转变温度和杨氏模量。

Air is regarded as the best refrigerant to substitution of the CFCs.

空气无毒无害，作为制冷剂可以被认为是氟利昂的最佳替代物。

It is noted that the effects of substitution on the C-Cl BDE of substituted chlorobenzene compounds are very insignificant.

研究了目标化合物的前线轨道能级差，并对取代氯苯化合物的热稳定性做了评估。

In this paper, the world production of PUR industry is described,including raw material, production and consumption of PUR,technical advances of PU foam,such as chlorofluorocarbon substitution technologies, flame retardant PU foams and Polyurethane Reaction Injection Molding and development of domestic polyurethane industry.

本文叙述世界聚氨酯工业生产概况，包括聚氨酯原材料以及聚氨酯产品的生产和消费情况；聚氨酯泡沫塑料技术进展，如氯氟烃替代技术，阻燃聚氨酯泡沫塑料和聚氨酯反应注射成型，以及国内聚氨酯工业的发展概况。

1 With chromosome number 2n=42 allcontained a pair of alien chromosomes, they were substitution lines.

利用分布于小麦染色体上的240对SSR引物对两个亲本莱州953和高大山羊草进行了多态性检测。

In a sentence such as There are now several Jews on the council, which is unexceptionable, the substitution of a circumlocution like Jewish people or persons of Jewish background may unwittingly suggest an unwarranted and hence suspect delicacy.

例这句话在现在的内阁里有一些犹太人就是无懈可击的，一种迂回的替换说法象犹太人或有犹太背景的人可以无意之中表明这只是一个未证实的事，因此只是一种微妙的猜测

Effect of the ratio of chitosan to citral,reaction time and temperature on the yield and the degree of substitution has been investigated.

采用[L9（33）]正交实验探讨了反应时间、反应温度及反应物配比对壳聚糖席夫碱缩合率和取代度的影响。

I switched from 8 to run on behalf of MT in the first 86 laps run, and I can skilled MT substitution in 9 of 7 file blacklist beat Mercedes CLK 500, the use of two or three hours.

从我开着8代MT的86跑第一圈算起，到我可以熟练的在9代用MT的7档梅塞德斯 CLK 500击败黑名单为止，用了两、三个小时。

And then Huaibei should have taken the new coalification industry of energy conversion and raw-material substitution as market development direction to develop ...

最后，就淮北发展煤化工需要重点关注的几个问题如淮水北调、资金筹措、煤化工技术、循环经济进行了深入探讨。

Therefore, it is imperative that you need to be prepared for the great change that is about to occur.

所以，你需要为快要出现的伟大改变准备好，这是必要的。

If u agree with our suggestion of dicker trade,we will exchange paper with u wood.

如果你方同意我们进行易货贸易的建议，我们将用纸与你们交换木材。