乙烷

Etherification of butanol with ethylene oxide by a new style solide acid catalyst is investigated.

研究了丁醇和环氧乙烷在一种新型固体酸催化剂上的醚化反应。

In this thesis, the mechanism of endogenetic ring forming reaction in the cationic polymerization of THF、 butylene oxide and ethylene oxide was investigated.

研究结果表明，环氧乙烷比四氢呋喃更容易发生分子内尾咬、扩环反应。

In this disseration, the cationic ring open-polymerization mechanism of THF、 butylene oxide and ethylene oxide were studied on the basis of electronic microstructures by using quantum chemicl method.

本文选取四氢呋喃、环氧丁烷和环氧乙烷的阳离子开环聚合为研究对象，运用量子化学方法从微观层次上对烷氧基化开环聚合过程进行了较为全面的研究。

The phase equilibrium of linear molecule,ethane,has been simulated by using the NVT canonical ensemble Monte Carlo method,and the thermodynamic properties of the system including chemical potentials ?temperature?density?pressure,etc.

用恒NVT正则系综MonteCarlo方法模拟线形分子—乙烷的相平衡，得出化学势、温度、密度、压力等热力学数据。

The development of production technology at home and abroad of ethylene dichloride and vinyl chloride monomer were discussed.

评述了二氯乙烷和氯乙烯单体生产技术的国内外进展，剖析了世界和中国的市场现状和前景。

The correct factor in metronidazole which is free of ethylene oxide,chloroform was used as internal standard.

用模拟基质进行校正因子的测定，以氯仿为内标测定甲硝唑中的环氧乙烷。

Alkylations of benzene with dodecene and/or chloromethane in the room temperature ionic liquid 1-methyl-3-butylimdazole chloride-aluminium chloride as catalyst have been investigated with high conversion and selectivity.

首次研究了在氯铝酸室温离子液体系中二甲苯与苯乙烯的烷基化反应制1-苯基1-二甲苯基乙烷及其衍生物。考察了离子液体催化剂量和反应条件的不同对产物组成及副产物数量的影响。

Methods The medical instruments were packaged with the all-cotton, medical crepe paper and paper plastic packaging materials, and then were sterilized respectively with high-pressure steam and ethylene oxide. They were stocked in the different places selected in hospital for regular bacterial incubation.

用全棉布、医用皱纹纸、纸塑包装材料包装医疗器械，分别进行高压蒸汽和环氧乙烷灭菌，存放在医院内具有代表性的场所，定期做细菌培养。

Bis(1,2,3,4-tetrahydroisoquinoline-2-ylmethyl) HBr salt (K2) guest has been synthesized from 1,2,3,4- tetrahydroisoquinoline and ethylenedibromide. The self-assembly interaction models of cucurbit[8]uril (Q[8]) with this synthetic guest have been investigated by using 1H NMR technique, single crystal X-ray diffraction determination and theoretic calculation method.

以用1，2，3，4-四氢喹啉和二溴乙烷合成的二(2-亚甲基-1，2，3，4-四氢异喹啉)的溴化氢酸盐为客体，八元瓜环为主体，利用1H NMR技术，单晶X射线衍射方法以及理论计算等方法，考察了两者的自组装模式。

Trace organic species, including cyanogen and ethane, were found in surface measurements.

在表面的测量中发现可追踪痕迹有机物，包括氰和乙烷。

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。