醚

The catalytic activity of this new resin catalyst in the isobutene oligomerization was measured in detail, it exhibited good catalytic activity and excellent isobutene dimerization selectivity.

在异丁烯的低聚反应中，对这种新型树脂催化剂的催化活性进行了细致的研究，磺化聚醚碸酮树脂催化剂在反应中表现出了很好的催化活性和优良的二聚选择性。

Dimethyl Ether is proved to be very promising as an alternative fuel for diesel engines.

理论分析和实验证明二甲基醚是一种极有应用前景的柴油机代用燃料。

BDMAEE and DMAEE were synthesized from diethylene glycol and dimethylamine .

以一缩乙二醇和二甲胺为原料合成了催化剂双醚和二甲胺基乙氧基乙醇。

Production Principle and technology of THF_CPO copolyether diol are introduced.

介绍了四氢呋喃—环氧丙烷共聚醚二醇的生产原理及工艺，并对生产中影响其收率的因素进行了初步分析。

As for polyether PUA, a new hydrophilic diol was synthesized from trimethylol propane and maleic anhydride.

在聚醚型PUA中以三羟甲基丙烷和马来酸酐为原料，合成了一种新的亲水二元醇。

Effect of heat treatment on the ndcrophase separation of a segmented poly copolymer based on poly diol, 3, 5 dithyltoluene diandne and 4,4'-diphenylmethane diisocyanate has been studied bymeans of fourier transform infrared spectroscopy.

用傅里叶变换红外光谱方法研究了热处理对由聚环氧丙烷聚醚多元醇、3.5－二乙基甲苯二胺和4，4－二苯基甲烷二异氰酸酯组成的多嵌段聚氨酯脲的微相分离行为的影响。

A method for the determination of polybrominated diphenyl ethers in pine needles was developed.

建立了测定松针样品中多溴联苯醚的分析方法。

As a kind of global environmental contaminants, polybrominated diphenyl ethers are ubiquitous in environment.

多溴联苯醚是一类环境中广泛存在的全球性有机污染物。

We also develop intermediates such as 2,4-Dinitrobenzyl Chloride and Diphenyl Ether.

同时也自主生产 2，4-二硝基氯化苯、二苯醚等中间体。

A method for simultaneous determination of residues of 9 diphenyl ether herbicides in cereals and oilseeds by GC-MS was presented.

利用气质联用技术建立了粮谷与油籽中9种二苯醚除草剂多残留同时检测的方法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。