查询词典 ether

It can dissolve in water alcohol isopropanlol or chloroform not in acetone or diethyl ether polymers having molecular weight under30000 can excreted by human kidney.

乙醇 。异丙醇或氯仿，不溶于丙酮，二乙醚，分子量在30000以下的聚合物能通过人的肾脏排泄。

The solubility of the novel polyamides are greatly improved compared with the conventional aramids, especially the polyamide with dendritic blocks of the second genernation as side chains are soluble in most of the common organic solvents such as ether, ethyl acetate, chloroform, acetone, tetrahydrafuran etc.

树状片段的引入大大地改善了聚酰胺的溶解性，特别是以第二代树状片段为侧基的聚酰胺的溶解性得到了很大的改进，可以溶于大部分常见的有机溶剂，如乙醚、乙酸乙酯、氯仿、丙酮、四氢呋喃等。

The cold-resistance effect of the Ether extracts, the n-BuOH extracts, the acetone and the chloroform extracts were obvious in the 7 different plant extracts.

试验结果表明： 1、植物材料前胡的7种不同溶剂提取物中，以乙醚、正丁醇、丙酮和三氯甲烷提取物质的抗寒效果明显。

The higher the concentration, the bigger the physiological index. 3. The Ether extract, the n-BuOH extract, the acetone and the chloroform extract treatment after chilling stress and restored the growth, the content of protein, the content of chlorophyll, SOD、POD and CAT activities were higher compared the control, the content of MDA was lower compared the control.

经前胡乙醚、正丁醇、丙酮和三氯甲烷提取物质喷雾处理的幼苗在低温处理36小时后，可溶性蛋白质含量、SOD、POD、CAT活性均下降，在低温处理恢复生长后，SOD、POD、CAT、可溶性蛋白和总叶绿素含量均比低温对照幼苗高，MDA含量比低温对照幼苗低；在低温处理后及恢复生长后各生理指标随浓度的增加呈现出先升高后降低的趋势。

The paraffin has the performance to resist acetone and the banana oil,and also has excellent anti acid alkali performance;All of the gasoline, rosin water and ether have better dissolution effect,their dissolving speed is very fast in.

针对非原油生产中石蜡从使用对象及其表面清除的问题，通过测定石蜡在几种常见试剂中的失重率、清蜡速度和溶解度等，研究了石蜡的溶蚀特征，并采用红外吸收光谱对溶蚀产物进行分析，结果表明：石蜡对香蕉水、丙酮等具有较强的抵御能力，并具有优良的抗酸、碱腐蚀性能；汽油、松香水、乙醚等三种试剂对石蜡都有较好的溶蚀效果，其溶解速度在第一小时内最快，之后变慢，9h后逐渐达到饱和；它们的清蜡速度分别是1。

When alkali cellulose is reacted with the sodium salt of chloroacetic acid, the sodium salt of the carboxymethyl ether (cellulose-O-CH2-CO2-Na+) is formed.

当碱性纤维素与盐酸的钠盐反应，羧甲基醚钠盐生成。

Who was among the first(1842) to use ether as an anesthetic.

麻醉师'。''的先驱，是最早使用乙醚作麻醉剂的人之一

In 1846, dentist William Morton used ether as an anesthetic for the first time on a patient in his Boston office.

1846年的今天，牙科医生威廉莫顿在波斯顿的办公室用乙醚作为麻醉剂，首次用于其病人。

A general anesthetic, such as ether, causes the loss of feeling throughout the body, It also produces complete or partial unconsciousness .

全身麻醉剂，如乙醚，造成全身感觉丧失。它也产生完全或部分意识丧失。

In 1846, dentist William Morton used ether as an anesthetic for the first time on a patient in his Boston office.

1846年的今天，牙科医生威廉莫顿在他医务所首次对病人使用太空醚作为麻醉剂。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。