乙醚

The water phase was back extracted with diethyl ether (3 10 mL).

水相 回到提取用乙醚。

The rats were anesthetized with diethyl ether continuously.

大鼠持续乙醚麻醉下，分别在距离肛门约3.5cm用针长8cm的1ml注射器

When the reaction is carried out at 22 ℃, a cage complex with an encapsulated diethyl ether, 2 is prepared.

发现温度对自组装反应有着重要的影响：当组装在37-40℃进行时，可以得到包容一个NEt〓的阳离子型超分子笼1，其对阴离子为BF〓，处在超分子笼的外面；当组装在22℃进行时，可以得到包容一个乙醚客体分子的中性超分子笼2。

Certain ratio of diethyl ether-hexane was used to wash off the impurity during the clarification of Extrelut and Florisil.

在Extrelut、弗罗里硅土两次柱净化过程中，确定了用一定比例的乙醚-正己烷预淋洗，洗去了大量杂质。

Methods: water decocting method for extracting method, ether as extraction solvent with high performance liquid chromatography, as the means, to test content of methanol 0-3 % diethylamine (73:27) as mobile phase, 242nm detected wavelength, according to the packing: Hypersil BOS C18 5 muon m size: 6 mm (4): 25 mm, standard curve basic linear, precision, accuracy, good stability and.

以水煎煮法作为提取方法，乙醚作为萃取溶剂，以高效液相色谱作为含量检测的手段，以甲醇-0。 3 %二乙胺(73∶27)作为流动相，检测波长242nm，依利特填料：Hypersil BOS C18 5μm 尺寸：4。 6 mm ×250 mm ，结果：标准曲线基本呈线性，精密度，稳定性和准确度良好。

In this paper, kinetics and mechanism of oxidation of dihydric alcohols、 ethylene glycol monoethyl ether 、 amino acids by Ag in alkaline medium were studied by spectrophotometry.

本文用分光光度法研究了在碱性介质中，二羟基二合银配离子氧化二元醇、乙二醇独乙醚和天冬氨酸的反应动力学及机理。

GC-MS analysis indicated that the major degradation intermediate products were hydroxy, dihydroxy and carboxylic derivatives of DMP and DEP.

DMP和DEP经过Fenton/UV氧化降解，通过乙醚萃取水相中有机化合物，再通过GC-MS分析，检测出了许多中间产物。

Trifluoromethyl-3-heptadfluoroisopropyl-2-perfluoropentene-4-(N',N'-dimethylamino propyl) imino was prepared by the reaction of hexafluoropropene timer with N,N-dimethyl propanediamine in the molar ratio 1:1.0 at room temperature for 8h, and the structures of VIII were identified by IR and NMR spectra.

以六氟丙烯三聚体与N，N-二甲基丙二胺为原料合成叔胺2-三氟甲基-3-七氟异丙基-2-全氟戊烯-4-(N'，N'-二甲胺丙基)亚胺，利用红外光谱和核磁共振确定其结构，并通过对合成条件的考察得其最佳合成条件：乙醚为溶剂，碳酸钠为缚酸剂，摩尔投料比为1：1.0，在室温下反应8小时。

According to different acidity of free Flavonoids in Resina Draconis, different acidic lavonoids were extracted with the pH gradient extraction method from ethyl ether.

根据血竭中游离黄酮存在着酸性差异，采用溶剂除杂，转溶于乙醚，再用pH梯度萃取得到不同酸性的黄酮，进而对弱酸性组分分离纯化得到2个单体化合物。

A new flavanone from Dryopteris sublaeta;2. Isolation and Structure Identification of a New Flavanone from Dryopteris sublaeta;3. RESULTS Five compounds are isolated from the ether fraction of 70% acetone-extracts,and their structures were identified as(2S)5,7-dihydroxy-6,8-dimethyl flavanone desmethoxymatt.

结果浅裂鳞毛蕨地上部分用体积分数为70%丙酮提取液乙醚萃取部位分离得到了5个化合物，分别鉴定为：(2S)5，7-二羟基-6，8-二甲基二氢黄酮，(2S)5，7-二羟基-6，8-二甲基-4′-甲氧基二氢黄酮，(2S)5，7，2′-三羟基-6，8-二甲基-二氢黄酮，(2S)5，7，4′-三羟基-3′-甲氧基-6，8-二甲基二氢黄酮，(2S)5-羟基-4′-甲氧基-6，8-二甲基二氢黄酮-7-O--βD-葡萄糖苷。

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。