醚的

In this study, the vapour–liquid equilibria behaviour of the binary systems dipropyl ether + 2-ethoxyethanol and 1-propyl alcohol + 2-ethoxyethanol and the ternary system dipropyl ether + 1-propyl alcohol + 2-ethoxyethanol was experimentally investigated with the aim of testing the feasibility of using 2-ethoxyethanol as an entrainer to the extractive distillation.

本文研究了2种二元体系（1：二丙醚+ 2-乙氧基乙醇；2：1-丙醇+ 2-乙氧基乙醇）和1种三元体系（二丙醚+ 1－丙醇+ 2-乙氧基乙醇）和的气液平衡行为，旨在测试2－乙氧基乙醇是否适合作为萃取性蒸馏的共溶剂。

With rapid development of internal fixator manufacture, materials for interspinous process device become increasing, such as bone allograft, titanium, poly (ether-ether-ketone) and lactoprene composite.

随着内固定器制作工艺的飞速发展，腰椎棘突间内固定器的材料构成范围也很广泛，包括同种异体骨移植物、钛、聚醚醚酮和人造橡胶复合物等。

MC and HPMC are both non-ionic,and etherified products of cellulose.They have functions such as thickening,emulsionizing,filming,water-maintaining,colloid-protecting,bonding,antienzyming,metabotic indifference and so on.They are applied widely in the fields of building,milkness paint,medcine,PVC,chemical articles,ceramics and agriculture.

甲基纤维素和羟丙基甲基纤维素均属非离子纤维素醚，是纤维素的醚化产品，具有优良的增稠、乳化、成膜、保护胶体、保持水份、粘合、抗酶以及代谢惰性等性能，广泛应用于建筑、乳胶涂料、医药、PVC、日用化学品、陶瓷以及农业生产中。

The X-ray diffraction shows that the resin is crystalline. The heat analysis shows that the resin is well heat-resistant and has very good thermal stability and T=101℃. The T is better 10℃ than polyphenylene sulfide. The PASI resin will be applied abraod.

表征结果表明，聚合物为设计聚芳硫醚酰亚胺结构；X射线衍射表明聚合物为结晶性聚合物；热性能测试表明，聚合物的玻璃化温度为101.91℃，高于聚苯硫醚(87.00℃)，聚合物具有良好的热性能。

A reduction-coupling-etherification reaction between aromatic aldehydes or ketones (1) and alcohols ( 2 ) to yield corresponding diether ( 3 ) of pinacol in the presence of tin and chlorotrimethylsilane.

在三甲基氯硅烷、四氢呋喃体系中，芳香醛、酮和醇在金属锡的作用下发生还原-偶联-醚化反应生成相应的频那醇二醚类化合物。

The result indicates that the best method for extracting β-carotene is to saponify the test specimen one hour with 4% NaOH methyl alcohol solution in 60-70'c and then to separate with 3:7 acetone-benzine component solvent as extraction solvent, MgO as the absorbent, the acetone-benzine as the eluent. Extracted solvent has been determined in the color dish condition (1cm) by ultraviolet spectrophotometer at 447 nm. The result shows that the β-carotene in carrotis 0.134 mgg^(-1), 0.0863mgg^(-1) in red pepper and 0.0426 mgg^(-1) in spinach.

结果表明，比较优先的β-胡萝卜素提取方法是：试样用4% NaOH甲醇溶液在60℃~70℃皂化1h，用3：7的丙酮－石油醚混合溶剂提取，以Mgo为吸附剂，丙酮－石油醚为洗脱剂分离，提取液用紫外分光光度计在波长447nm，1cm比色皿条件下测定，得出蔬菜中β-胡萝卜素含量：胡萝卜为0.134mgg^(-1)，红椒为0.0863mgg^(-1)，菠菜为0.426mgg^(-1)。

STUDY ON THE APPROACH AND THE MEDCHINE FOR THE DEPROTECTION OF SILYL ETHER BY SODIUM PERIODATE Abstract Silyl ethers are the most widely used hydroxyl protecting groups in organic synthesis.

第二部分：过碘酸钠去硅醚保护基方法及机理的研究硅醚保护基种类多，稳定性较好，且反应简单，作为羟基的保护基在有机合成中得到广泛应用。

Five species of solvents, namely, acetone, ethyl acetate, ether, trichloromethane and petroleum ether were selected to obtain extracts from Portulaca oleracea L. with microwave assistance and the biological activities of each extract was tested against Plutella xylostella L.

在微波加热条件下，以丙酮、乙酸乙酯、乙醚、三氯甲烷和石油醚为溶剂对马齿苋干粉进行提取，试验了各溶剂提取物对小菜蛾幼虫的触杀、胃毒及拒食活性，确定了石油醚提取物触杀作用的LD50。

The results indicated that: Tripyrazolone, tripodal and crptands ligand L〓, L〓 and L〓 have good coordination ability with rare earth ions Rare earth ions were coordinated with their oxygen and nitrogen atoms.

结果表明，三脚架结构吡唑啉酮、三酸和穴醚配体与稀土离子有较好的配位作用，它是通过氮原子、氧原子与稀土离子配位的。而穴醚配体与稀土离子配位效果却不好。

After induction, a depolarizing or non-depolarizing neuromuscular blocking drug can be given intravenously to facilitate tracheal intubation.

吸入诱导：吸入一氧化氮加上强有力的挥发性麻醉剂（如氟烷、安氟醚或异氟醚），能在3－5分钟内诱导麻醉，诱导后可经静脉给予去极化或非去极化的神经肌肉阻滞剂，以利于气管插管。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。