查询词典 olefinic

This dissertation concentrated on its low-cost synthesis, adjusting of silica to alumina molar ratio and catalytic applications in olefinic alkylation of thiophenic sulfur of simulated FCC gasoline and aromatization of butene in liquefied-petroleum-gas process.

本论文旨在降低MCM-22合成成本，获得硅铝比范围宽泛可调的MCM-22，并拓展其在烯烃烷基化脱硫与液化气丁烯芳构化方面的应用。

In this dissertation, electrophilic reactions of Nitrosonium with imines, aza-Diels-Alder reactions of N-arylimines with a variety of electron rich olefinic compounds induced by NO~+, and photoreactions of N-nitrosodiphenylamine with aromatic amines were studied.

本文研究了：(1)NO~+与亚胺双健发生的亲电反应；(2)NO~+引发的芳香亚胺和富电子碳碳双键作为亲二烯体的氮杂Diels-Alder反应，高选择性地得到了一系列四氢喹啉的衍生物；(3)N—亚硝基二苯胺与芳香胺发生光化学反应得到了一系列偶氮苯类化合物。

Brominated butyl rubber was prepared by solution method,and its microstructures were characterized by 1H-NMR. It has three main microstructures,that is the unbrominated isoprene structure,the exomethylene allylic bromide structure (structure Ⅱ) and the bromomethyl olefinic structure (structure Ⅲ).

通过溶液法制备溴化丁基橡胶，并用核磁共振对溴化丁基橡胶的微观结构进行了分析，其中存在3种主要微观结构，即未溴化的丁基橡胶结构，溴代仲位烯丙基结构及溴代伯位烯丙基结构。

The electron impact mass spectra of the chemical products modified by 2-amino-2-methylpropanol of the fatty acids in sunflower oil were analyzed; the allocation rule for the carbon double bonds in olefinic acids was discussed and the location of the carbon double bonds of the fatty acids in sunflower oil was confirmed.

解析了葵子油脂肪酸2-氨基－2-甲基－丙醇化学修饰产物的EI质谱图，讨论了烯酸中碳碳双键的定位规则，确定了葵子油脂肪酸中碳碳双键的位置鉴定出葵子油6种脂肪酸，不饱和脂肪酸相对含量为89.41%，其中人体必需脂肪酸9，12-十八碳二烯酸含量占65.30%。

Selected novel olefinic orthoesters, may be copolymerized with other olefins using certain late metal transition catalysts, to form novel polyolefins containing orthoester pendant groups.

利用某些后过渡金属催化剂，可以使选择的新颖烯烃原酸酯与其它的烯烃共聚合，以形成含原酸酯侧基的新颖聚烯烃。

We used the derivatives to do the MTT assay test and to discuss the SAR, the result teld us the isoprenyl group and the 3,4-olefinic bond of osthol is essential for its activity,and the isoprenyl group at position 8 had the better cytotoxicity. When osthol and demethylsuberosin reacted with ferulic acid to form the derivatives of (26) and (35) have the better effect of anti-cancer and IC50 value than osthol.

所以我们选择蛇床子素进行结构上的修饰并与姜黄素的部分结构形成的化合物ferulic acid结合合成出一系列的衍生物，进行抗癌细胞毒杀活性测试来探讨其结构与活性的关系，发现osthol上的isoprenyl group对於抗癌活性有重要的影响，且isoprenyl group位於C8的位置对於抗癌活性有较好的表现。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新