查询词典 ether

It is found that the coexisting curves of the temperatures versus the volume fractions of water, cyclohexane and diethylene glycol monobutyl ether are respectively inverse "S" type curve, positive "S" type curve and "knot-shape" curve.

用改进的相体积法测定了水－环己烷－二乙二醇丁醚三元体系的相平衡，给出了不同温度下平衡共存三液相的体积分数及平衡共存三液相的相密度的共存曲线。

The poison activity, stomach toxicity action and nonselective food refusal activity of extracts and fractions obtained by extracting the stem of Mirabilis jalapa L against the 4th instar larvae of Pieris rapae L, with 3 polarity solvents（petroleum ether, chloroform and ethanol）were determined by the methods of feeding, leaf-sandwich and leaf dish.

用饲喂法、叶片夹毒法、叶磲法测定了紫茉莉茎的3种极性溶剂提取物及萃取物对菜粉蝶幼虫的毒杀活性、胃毒作用、非选择性拒食活性。

Crystallographic equivalence of ether and ketone group in the crystal structure of poly s was discussed again on the basis of the work reported in the literatures, which there were different viewpoints to.

对存有争议的聚芳醚酮晶体结构醚酮等效性问题进行了研究。首先设计并合成两种新型聚芳醚酮类聚合物PEDK与PEDEKDK，并对其晶体结构进行解析。

Secondly, a theoretical study of four lariat crown ethers, including one aza-15-crown-5 lariat ether and two aza-18-crown-6 lariat ethers, has been done using density functional theory with B3LYP/6-31G* method in order to obtain some parameters , such as E HOMO, E LUMO, and gap energy, etc.

其次，用密度泛函理论在B3LYP/6-31G*水平上对四个臂式冠醚分子进行了电子和几何结构优化计算。

Both the protection and deprotective group methods for the amino-group on side chain of a new N-pivot lariat crown ether were studied comparatively.

研究了一种新的氮支套素冠醚侧链上氨基的保护和脱保护基方法，结果表明，由过量乙二胺与对甲苯磺酰氯反应得到的单保护乙二胺（N－对甲苯磺酰基乙二胺4a），经N－烷基化环化反应，然后在氢化铝锂存在下脱除保护基，即可制得最佳产率的N－（2－氨基已基）单氮杂－12－冠－4（1）。

It has been known for more than 100 years that substances like ether, laughing gas, chloroform, procaine and the noble gas xenon can serve as anesthetics.

100多年来，我们已经知道乙醚、氯仿、普鲁卡因和惰性气体氙等物质可以充当麻醉剂。

You are such a good friend that if we were on a sinking ship tog ether and there was only one life jacket...

好吧，既然这艘船要沉了，救生衣又只有一件，我就勉为其难的虚伪一下，你对我来说实在是不能再好的朋友了。。。

On the other hand, alcohol and phenol compounds are the main compounds in ether fractions (SF2 and LF2), where the main compound is linalool.

在乙醚区分物(SF2， LF2)的组成分中皆以醇酚类化合物为其主要的组成分，其中以linalool为主要的化合物。

The results show that ether worked effectively as the anesthesia, and could enhance the livability.

结果表明，乙醚麻醉效果明显，可以显著提高活鱼存活率。

By Tuesday, a number of popular games, including "Godfather,""Gangster" and "Mafioso Hitman," had been excised from the ether, although scores of other violence-laden games were still available.

周二，一些流行游戏，包括，教父，匪徒，黑社会杀手等被从以太网上清除掉了，虽然还有数十个暴力游戏依然存在。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。