甲醇

The ring-opening polymerization process of ethylene oxide as initiated by sodium methoxide was studied using the density functional theory /Dmol^3 method.

运用密度泛函理论的Dmol^3方法，计算了甲醇钠引发的环氧乙烷开环聚合的反应过程。

Chemical randomized interesterification of lard catalyzed by sodium methoxide and the effect of reaction temperature,time and catalyst dosage on the interesterification degree were investigated in this paper.

结果表明，在反应温度60℃、反应时间30 min、催化剂浓度0.1%的条件下，甲醇钠可以催化油脂酯-酯交换反应达到完全随机化。

In this paper, preparation of cholesterol by transesterificatiom of lanolin with different catalysts, i.e., sodium methoxide, formic acid, and two kinds of basic anion exchange resin, was investigated.

采用不同催化剂转酯化法从羊毛脂中获得游离胆固醇，分别研究了以甲醇钠、甲酸及强碱阴离子树脂为催化剂的工艺方法。

Samples of lactide with melting point 127℃ were conducted a quantitative analysis test by using non aqueous titration with sodium methoxide and Karl Fischer method.

用甲醇钠非水滴定法、卡尔－费休法对熔点为127℃的丙交酯样品进行了定量分析试验，测出残存的乳酸和水的质量分数分别为0.09％和0.07％左右，回收率分别为98.64％～101.2％和98.74％～101.1％。

Carbon dioxide ; Methanol ; Dimethyl carbonate ; Supported nickel methoxide complex ; SiO\-2 support

二氧化碳；甲醇；碳酸二甲酯；负载型镍甲氧基配合物； SiO2载体

Take the mixture of methanol/NaOH (commonly called methoxide on this forum) and pour on top of the oil using the same funnel.

将甲醇和氢氧化钾的混合液通过同一个滤斗倒入塑料软饮料瓶。

Further investigation indicates that methoxyl group was produced only by the reaction of methanol with surface hydroxyl group. It was also revealed that methoxyl group vanished quickly when it was exposed to water vapor.

进一步的研究结果表明，甲氧基是由甲醇同氧化锌表面的羟基反应生成的，将其暴露于水蒸汽中后很快消失。

The FTIR results show that methoxyl group was formed from the adsorbed methanol on the surface of zinc oxide, and its amount increased with increasing adsorption temperature.

FTIR结果表明，甲醇吸附于氧化锌上易生成甲氧基，且其生成量随着吸附温度的提高而增加。

The formation of methanol （pectic substance in raw materials hydrolyzed into methoxyl group during heating and cooking and further deoxidized into methanol） occurred throughout beet molasses processing and alcohol production.

甲醇的生成贯穿于甜菜糖蜜加工及酒精生产的全过程，是由原料中的果胶质在加热蒸煮过程中水解生成的甲氧基还原而成的。

As for acetalation, we research the effects of acid kinds, acid quantity, temperature solvents on it and get the conclusions that the optimized acid is sulfuric acid, the optimized temperature is 65 °C, the reaction time is five hours, and the material ratio of sulfuric acid to methylglyoxal to methanol is 0.028:1:6.837.

在醛保护一步中，研究了酸种类、酸用量、温度及其溶剂的影响，得到了本反应的较好条件是：酸为浓硫酸，反应温度为65℃，反应时间为5小时，浓硫酸：丙酮醛：甲醇的配比为0.028：1：6.837，反应收率可达81%。

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。