查询词典 methyl-ethyl ether

The different enzyme protecting agent had effected on the liquid alkaline protease under the dissimilar condition. Taking the living rate of enzyme as the target, we obtained one high effective alkaline protease stabilizing agent formula through orthogonal experiments as following: 5 mmolL^(-1) Ca(superscript 2+), 15mgmL^(-1) trimethylene glycol-single methyl ether, 0.015% 4-formyl phenyl-boron dihydroxide, 1% glycerine.

在此基础上，进行L13(3^7)正交实验，以相对酶活率为指标，考察了不同酶活性保护剂在不同条件下对液体碱性蛋白酶活力的影响，筛选到一种优质高效的碱性蛋白酶稳定剂配方为：5mmolL^(-1) Ca(上标 2+)，15mgmL^(-1)丙二醇－单甲醚，0.015% 4-甲酰苯基硼酸，1%甘油。

The sample was extracted by deionized water. The extract was cleaned up and concentrated on a SPE column, then eluted by methyl-tert-butyl ether. The elution was concentrated under nitrogen and redissolved to 1 mL.

样品中24种目标物用蒸馏水浸出后，经固相萃取小柱富集净化，再用叔丁基甲醚洗脱，洗脱液氮吹浓缩定容后用气相色谱－质谱法测定。

Methods The drying soybean products were triturated. The powder samples were defated by the diethyl ether for 5 hours, and returned by the 80% methyl alcohol solutions with the liquid-solid ratio of 25:1 for 5 hours. The content of the total isoflavone in filtrate was determined by ultraviolet spectrophotometry.

将烘干的豆制品研成粉末，取粉末样品置于索氏抽提器中，用乙醚脱脂5h后，用80%的甲醇溶液以25：1的液固比热回流5h，用紫外分光光度法测定滤液总异黄酮含量。

Soluble comb-shaped polyether phosphate type polymer LPEP was obtained by polymerizing the phosphate macromolecular monomers with long side chain, which was prepared by reacting polyethylene glycol mono methyl ether and other compound with phosphoryl oxychloride.

来源：ABCd7论文网www.abclunwen.com对分子结构和合成工艺进一步改进，采用聚乙二醇单甲醚等与三氯氧磷反应合成了长链型磷酸酯大分子单体，聚合得到可溶性的梳状聚醚磷酸酯型聚合物LPEP。

The engine ran on a special mixture of methyl alcohol (63%), benzene (16%), ethanol (12%), acetone (4.4%), nitrobenzene (2.2%), avgas (2%), and ether (0.4%) with MW (methanol-water) injection for charge cooling and as an anti-detonant.

特别混合物燃料为引擎运转提供动力，甲醇(63%)，苯(16%)，对氨基苯甲酸二(12%)，丙酮(4.4%)，硝基苯(2.2%)，飞机用燃料(2%)和乙醚(0.4%)，以100W充电冷却射入并作为抗爆剂。

The main reason for the deactivation is that the catalysts react directly with methyl formate produced to form alkali formates (sodium formate and potassium formate) and diemthyl ether.

导致催化剂活性降低的主要原因是甲醇钠可以直接与产物甲酸甲酯反应形成甲酸钠和二甲醚。

All of the three ether imides synthesized exhibited low inherent viscosity, high thermal stability of 456 to 499 oC in TGA measurement (5wt% loss/N2) with Tgs between 240 ~254 oC. They also show good solubility behaviors in N-methyl-2- pyrrolidinone, dimethyl sufloxide, dimethyl formamide, chloroform, and m-cresol.

所得聚醚亚醯胺高分子皆具如下相同之优点如：包括低固有黏度表现，其热性质上也具高隐定性，其TGA在氮气5 wt %重量损失测定可达456 ~ 499 ℃，其玻璃转移温度达240 ~ 254 ℃，在溶解度方面，它们皆可溶解於高极性有机溶剂如： NMP、DMSO、DMF，亦可溶於中极性之溶剂如CHCl3、m-cresol。

With regard to anion exchange membranes,the traditional preparation method involves a much complicated process—chloromethylation,in which the commonly used chloromethyl methyl ether and bis-chloromethylether are now considered carcinogens.Therefore,it is necessary to develop new routes to prepare anion exchange membranes without such chloromethylation process.As for cation exchange membranes, mostly-perfluorinated sulfonic acid ionomers,such as Nafion~?

对于强碱性的阴离子交换膜的制备，由于传统路线中的卤甲基化步骤中不可避免的采用强致癌物质二氯甲醚，因此无论是从经济成本还是环境保护方面，开发不采用氯甲基化步骤的阴离子交换膜制备方法是目前的一个迫切要求。

By using polymerizable surfactants, the stability of the latex and water resistance of the film can be improved. Sodium monoalkyl maleates polymerizable surfactants, sodium monoalkylpolyoxyethylene maleates polymerizable surfactants and N-methyl-N-monododecylfumaroyl taurine polymerizable surfactants are synthesized, by using normal fatty alcohols, alkyl poly ether and maleic anhydride.

以直链脂肪醇、脂肪醇聚氧乙烯醚和马来酸酐为起始原料，设计合成了马来酸单脂肪醇酯钠盐A系列、马来酸单脂肪醇聚氧乙烯醚酯钠盐B系列、N-甲基-N-脂肪醇单酯富马酰基-牛磺酸钠D系列的可聚合乳化剂。

Adopting condensation copolymerization between alkylphenol polyoxyethylene ether and methyl aldehyde and using concentrated sulfuric acid sulfonation, which it with sodium hydroxide neutralization, finally acquired sulphonate anionic surfactant, utilize as temperature resistance 、mineral salt tolerance for heavy oil viscosity reducer , research on the performance evaluation, the result indicate, the amount of sulphonate anionic surfactant to be used at 0.2wt%, viscosity reducer rate reached 92.1%; added with 0.5wt%, the calcium and magnesium ions resistance in mineral water up to 800mg/L.

采用辛基酚聚氧乙烯醚和甲醛的共缩聚物与浓硫酸磺化后，再用氢氧化钠中和后得到磺酸盐阴离子表面活性剂作耐温抗矿盐稠油降粘剂，并对其进行性能评价，结果表明，辛基酚聚氧乙烯醚甲醛共缩聚物磺酸盐阴离子表面活性剂加量为0.2wt%时，降粘率高达92.1%，抗钙、镁离子能力达800mg/L。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。