查询词典 ether

In another direction, the radical cyclization of thioimide with acylsilane produced simple cyclization product in low yield without expected enol silyl ether compound.

对於硫醯亚胺与矽基酮的自由基反应，则是得到低产率的简单环化产物，而不是预期的烯醇矽醚化合物。

The optimun conditions were pressure 300 Mpa,temperature 45 celsius degree,extraction time 3h and the entrainer was petroleum ether.

确定工艺条件为：压力30MPa，萃取温度45℃，萃取时间3 h，携带剂为石油醚。

Object: The antimicrobial effects of the water, 60% alcohol, 90% alcohol extract and petroleum ether, ethyl acetate, n-butanol components from Pomegranate rind against 3 kind of pathogenesis bacterial and 14 kind of epiphyte were accomplished.

目的：对石榴皮的水、60%乙醇、90%乙醇提取物以及石油醚、乙酸乙酯、正丁醇萃取物对3种细菌和14种真菌的体外抗菌试验进行了研究。

The preparation process of equisetum pratense total alkaloid includes the following steps: coarse pulverizing equisetum pratense to obtain rough powder, methyl alcohol percolation to obtain percolate, recovering methyl alcohol, concentrating, degreasing by means of petroleum ether, alkalifying concentrate, CHCl3 extracting, soda lye washing, neutral water washing, recovering CHCl3 to obtain rough alkaloid, adsorption by using silica gel column, eluting, recovering solvent so as to obtain refined EPR.

该发明是通过两个步骤来实现的：第一步，提取草问荆总碱，流程：草问荆粗粉――渗漉液――浓缩液(析胶、石油醚脱脂、氨水碱化)――碱化浓缩液(CHCl3萃取)――CHCl3层――CHCl3液(回收CHCl3)――粗生物碱――吸附硅胶柱――精致EPR。第二步，选择实验试剂、仪器、用小鼠作为实验对象，进行中枢神经系统实验，研究作用及作用机制。

ResultsThe contents of six samples in fatty oil and petroleum ether extracts had no difference,but they had significant difference in water extracts ,ethanol extracts,aesculetin and esculin.

结果各地千金子样品脂肪油组分、醚溶性成分差别不大，水溶性成分、醇溶性成分、秦皮乙素和七叶树苷差异较大。

Some have such a vast appetite for the former commodity, that is, the news, and such sound digestive organs, that they can sit forever in public avenues without stirring, and let it simmer and whisper through them like the Etesian winds, or as if inhaling ether, it only producing numbness and insensibility to pain —— otherwise it would often be painful to bear —— without affecting the consciousness.

有些人，对于前一种的商品，即新闻，是胃口大，消化能力也一样大的，他们能永远一动不动地坐在街道上，听那些新闻像地中海季风般沸腾着，私语着吹过他们，或者可以说，他们像吸入了一些只是产生局部麻醉作用的乙醚，因此意识还是清醒的，苦痛却被麻痹了，——要不然有一些新闻，听到了是要使人苦痛的。

It is the first time that the petroleum ether extract and ethyl acetate extract of Nerviliafoadii.

首次确定了青天葵的石油醚和乙酸乙酯部位是体内抗肿瘤作用的有效部位。

Objective To study the antitumor effects of the petroleum ether extract from Stellera Chamaejasˉmel L.

目的研究瑞香狼毒石油醚提取物的抗肿瘤作用。

For the determination of organochlorine and pyrethroid pesticide residues, the sample was extract with petroleum ether.

有机氯和拟除虫菊酯类农药残留测定中，利用石油醚对样品进行提取。

The extract of petroleum ether of Rhizoma Amorphophalli is possibly one of antineoplastic parts of the plant.

蛇六谷石油醚萃取物可能是该药抗肿瘤的有效部位之一。

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。