醚的

In according with the reaction mechanism of alchohol and aldehyde, the reactional condition of 414 was originally explored.

根据醛对醚的加成反应机理，对414的合成条件进行了初步探索，确定了反应的最初反应条件。

Catheterization measurements were repeated at 5,10, and 15 min after completion of ketamine load.

在七氟醚的共同作用下，氯胺酮并不增加自主呼吸的肺动脉高压儿童的肺血管阻力。

The synthesis of guaifenesin was improved by direct application of the hydrolyzate of epichlorohydrin for the etherification with guaiacol and using toluene and ethyl acetate as the solvents for crystallization and recrystallization, respectively.

通过直接利用环氧氯丙烷的水解液中的 3-氯- 1，2 -丙二醇和改良成品析晶法及重结晶溶剂等工艺改进，愈创甘油醚的总收率可达 80 %。

In recent years, the rapid development of domestic industries spandex polyurethane, polyether, the rapid growth of demand.

由于近年来国内氨纶的聚氨酯行业的高速发展，对聚醚的需求量快速增长。

Quinone methides, generated in situ from the reaction of 4-hydroxycoumarin with benzaldehyde, formaldehyde and pentanal, underwent the Diels-Alder reaction with silyl enol ethers to give a series of 3,4-dihydro-2H,5H-pyrano[3,2-c][1]benzopyran derivatives in high yields.

通过4-羟基香豆素与苯甲醛、甲醛和戊醛缩合产生的quinone methide与烯醇硅醚的Diels-Alder反应，以较高产率合成了一系列含有硅氧基的3，4-二氢-2H，5H-吡喃并[3，2-c][1]苯并吡喃-5-酮衍生物。

A review with 21 references on development and applications of calix crown ethers are described.

摘要综述了杯芳冠醚的産生、发展及应用研究的新进展，展望了它的工业应用前景。

Finally, two components mixture of caprylic acid and lauryl alcohol was used to attestate the validity of the process model. The model was also used in the simulation of the paroxetine free base and PB, compared with experimental outcome, analyzed the relatively error between experiments and simulations to further check the rationality of the model, which is beneficial to establish a more perfect model in the future.

应用正辛酸-十二烷醇对模型进行验证，并应用此模型模拟计算了帕罗西汀碱和胡椒基丁醚的分离过程，进一步验证了此模型的合理性，分析了产生实验值与模拟值相对误差的原因，为进一步完善刮膜式分子蒸馏过程模型奠定了基础。

Ethylene glycol phenyl ether is mainly used in solvent, pharmaceuticals and commodity chemicals.

目前 ，全球乙二醇苯醚的生产能力约为 17万t/a，装置开工率在 80 %～ 90 %，产品的主要应用领域有溶剂、医药、日用化学品等。

Although many researchers have studied the synthesis of allyl phenyl ether by phase-transfer catalysis, no studies have used it in membrane reactor up to now. The purpose of this paper is to combine the studies of membrane reactor and phase-transfer catalysis. The membrane was used to stabilize the aqueous/organic interface at a fixed position, also the quaternary ammonium ion in the membrane was used as the catalyst to partake in the reaction system directly, and so it can also separate the product and reactants at the same time. A theoretical model is also presented.

中文摘要对於利用相间转移触媒催化技术来合成丙烯基苯基醚的反应，已有不少专家学者研究过，而至今还无在薄膜反应器中进行此反应之研究，本研究则是要结合薄膜反应器与相间转移触媒两者之特性，固定水油两相之界面，并且利用薄膜上的四级铵离子为触媒，直接在反应系统中参与反应，并同时分离产物及反应物，进而推导出相关之理论模型。

In the test,the high purity white sodium sulphide crystal with concentration of 45% Na_(2)S taken as raw material,anhydrous sodium sulfide is obtained by drying it in vacuum.

高纯度的无水硫化钠是合成高性能特种工程塑料聚苯硫醚的优质原料。

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。