查询词典 sulfur ether

Influences of reaction temperature, catalyst concentration, molar ratio of methanol to propylene oxide and reaction time on conversion of propylene oxide, yield and selectivity of propylene glycol monomethyl ether were studied.

在反应温度为120～130℃、催化剂用量为0.20%～0.30%、甲醇与环氧丙烷摩尔比为3/1～5/1的反应条件下，环氧丙烷的转化率在98％以上，丙二醇甲醚的选择性达95％，收率达93％，产品中伯醚的选择性为92％～93％。

He effect is stronger than that of its by-products, such as MME(propylene glycol monomethyl ether) and PG.

S-1失活是由积炭沉积物引起的，积炭物种主要由PG、PO自聚物以及PO与MME、PG形成的聚合物组成。

Specifications / physical data on the physical characteristics: Composition: propylene glycol monomethyl ether, surfactant, water, and other proprietary components.

规格/物理数据物理特征：成分：二丙二醇单甲醚，表面活性剂，水，其他专有成分。

In this dissertation, polyethylene glycol monomethyl ether of 2000 molecular weight as soluble support, an array of soluble polymer-supported tartrate esters were designed, synthesized, and applied in asymmetric epoxidation of allylic alcohols.

本论文以平均分子量为2000的聚乙二醇单甲醚为可溶性支载体设计和合成了一系列可溶性聚合物支载的酒石酸酯配体，并将它们用于烯丙基醇的不对称环氧化反应。

Influences of reaction temperature, catalyst concentration, molar ratio of methanol to propylene oxide and reaction time on conversion of propylene oxide, yield and selectivity of propylene glycol monomethyl ether were studied.

研究了甲醇与环氧丙烷在固体碱催化剂MAF存在下非均相合成丙二醇甲醚的过程。

First of all, graft reaction of poly (ethylene glycol monomethyl ether) onto EAA through the esterification reaction was performed.

接触角测试和静态蛋白质吸附实验表明接枝后的膜亲水性和抗蛋白吸附性能得到有效提高。

Propylene glycol monomethyl ether propionate is new member cf P series solvent of glycol ethers, it not only has the excellent solubility, but also has the lowest genital toxicity among the all of glycol ethers, as a result it is called "green solvent".

丙二醇单甲醚丙酸酯是P系列二元醇醚溶剂中的新成员，它不仅具有优异的溶解性能，更是二元醇醚溶剂中生殖毒性最低微的产品，因而被称为&绿色溶剂&。

Porous titania thin films were obtained via sol-gel method with hydroxypropyl-cellulose as the additive,ethylene glycol monomethyl ether as solvent.

以乙二醇甲醚为溶剂，羟基纤维素为添加剂，用溶胶-凝胶法制备了多孔TiO2薄膜。

is that zinc acetate, sodium acetate and transition metal salt are dissolved in ethylene glycol monomethyl ether as precursor; then ethanol is added as stabilizer; after stirring, the stable sol is formed.

将醋酸锌、醋酸钠和过渡金属盐作为前驱物，溶于乙二醇甲醚中，并加入乙醇胺作为稳定剂，搅拌后形成稳定的溶胶。

However, the main side effect of PDT is long term skin photosensitivity after the treatment because of the slow elimination of hematoporphyrin derivative from the skin. For solving this problem, 21 PWS volunteers accepted a new photosensitizer hematoporphyrin monomethyl ether in the treatment. 26 lesions ...

为解决治疗后的较长时间皮肤光敏反应这一主要副作用，本文对21例志愿鲜红斑痣患者的26个病灶应用血啉甲醚为光敏剂进行了治疗，对HMME的作用进行了临床观察，发现HMME具有良好的疗效、较轻的局部反应、较短的避光期和可行重复治疗的间隔期等优点，值得对其进行深入的研究。

You think you're a big shot.

你认为你是一个大人物？

All states are equal, and none can receive special treatment from the federal government.

所有的州都是平等的，任何州都不能获得联邦政府的特别待遇。