丁烯酸

Electropolar solvent such as THF may destroy the polyetherimide layer,while non-electropolar solvent such as petroleum ether cannot solve vinyl acetic acid cobalt.

极性溶剂如四氢呋喃会溶解PEI层，而非极性溶剂如石油醚又不能溶解丁烯酸钴。

From the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonylmethylate, the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonyl- methylate followed by cycloaddition reaction, was tentatively proposed.

通过研究反应过程中分离出的副产物反丁烯酸二乙酯III和4，5-二氢吡唑-3，4，5-三羧酸乙酯IV，初步提出了反应经过乙氧羰基甲基化苯并二氮杂卓翁中间体V再发生环加成反应的机制。

They are 4-(2- hydroxy-3-butynlenoxy) benzoic acid (1, WA), 5-chloro-7, 8-dihydroxy-7-methyl- 6-oxo-3- [ -3, 4-dihydroxy-3, 5-dimethyl-l-heptylene] -1H-8, 8a-dihydrobenzo [2, 3-c] pyran (2, WB),-2-(2-methyl-2-dibutene diamido)-2-butenoic acid (3, B5262), 3, 4-dihydro-9, 10-dihydroxy-7-methoxy-3-methyl-1H-naphtho [2, 3- c] pyran-1-one (4, A73 semi-Vioxanthin), 8, 8'-bis (6, 9-dioxo-3,4-dihydro-10- hydroxy-7-methoxy-3-methyl-1H-naphtho [2, 3-c] pyran-1-one)(5, A122 Xanthomegnin), 2, 5-dioxo-3a-hydroxymethyl-3, 3a, 6, 6a-tetrahydro-furo [2, 3-b] furan (6, 1003-2), 7-acety1-5-chloro-6, 8-dioxo-7-methyl-3- [ -3, 5-dimethyl-1, 3- diheptylene] -4aH-benzo [2, 3-c] pyran (7, M2-2 sclerotiorin), respectively.

它们分别被命名为4-（2-羟基-3-丁炔氧基）苯甲酸（1，WA）、5-氯-7，8-二羟基-7-甲基-6-氧代-3-[-3，4-二羟基-3，5-二甲基-1-庚烯基]-1H-8，8a-二氢苯并[2，3-c]吡喃（2，WB）、-2-（2-甲基-2-丁烯二酰亚胺基）-2-丁烯酸（3，B5262）、3，4-氢-9，10-二羟基-7-甲氧基-3-甲基-1H-萘并［2，3-c］吡喃-1-酮（semi-Vioxanthin，4，A73）、8，8'-双（6，9-二氧代-3，4-二氢-10-羟基-7-甲氧基-3-甲基-1H-萘并［2，3-c］吡喃-1-酮）（Xanthomegnin，5，A122）、2，5-二氧代-3a-羟甲基-3，3a，6，6a-四氢-呋喃并［2，3-b］呋喃（6，1003-2），7-乙酰基-5-氯-6，8-二氧代-7-甲基-3-［-3，5-二甲基-1，3-庚二烯基］-4aH-苯并2，3-c］吡喃（Sclerotiorin，7，M2-2）。

Analysis of the treated aqueous solution was conducted with GC-MS,and the main intermediates during phenol degradation were isobutyric acid,malonic acid,benzoquinone,butenoic acid,oxalic acid,maleic acid,succinic acid,hydroquinone,catechol and resorcin.

利用GC-MS分析了苯酚降解主要中间产物为异丁酸、丙二酸、对苯醌、丁烯酸、乙二酸、顺丁烯二酸、丁二酸、邻苯二酚、对苯二酚及间苯二酚等，并据此推测了苯酚电催化氧化的可能反应途径。

Crotonic acid can be made by crotonaldehyde oxidized,and crotonaldehyde widly exists asthe accessory substance in the chemical enterprises that produce and use aldehyde.

丁烯酸可由丁烯醛氧化制得，而丁烯醛在生产和使用乙醛的化工企业作为副产物广泛存在，是一种需治理的废弃物，我国具有生产丁烯酸的原料条件。

Condensation of cinnamaldehyde with methyl crotonate in the presence of alcohol-flee potassium methoxide gives,after hydrolysis,p-phenyl-benzoic acid in low yield.Its structure has been ascertained by direct comparison with an au- thentic sample.

桂皮醛与α-丁烯酸甲酯在催化剂去醇的甲氧基钾影响下进行反应，得到低产率的对-苯基-苯甲酸，共结构经用已知方法所得同样的酸直接加以比较而确定。

The overall activation energies of crotonic acid, undecylenic acid and oleic acid systems are 118, 122 and 134 kJ/mol, respectively.

反式丁烯酸、10-十一烯酸、油酸接枝ABS树脂的反应活化能分别为：118、122、134kJ／mol。

In this paper, grafting of crotonic acid, undecylenic acid, oleic acid, and acrylic acid onto acrylonitrile-butadiene-styrene terpolymer were studied. Experimental factors influencing grafting, kinetics and mechanism of grafting, the reactivity of grafted polymer, and the compatibilization effects of grafted ABS on ABS blends were investigated.

本文主要研究反式丁烯酸、10-十一烯酸、油酸、丙烯酸接枝ABS树脂的影响因素、接枝反应机理和动力学、接枝物的反应活性，以及接枝物对ABS共混物的增容作用。

Grafting degree increased with increasing monomer concentration in acrylic acid and crotonic acid systems. In undecylenic acid and oleic acid systems, grafting degree increased with monomer concentration initially but decreased after monomer concentration reaching at 0.30 mol/L.

丙烯酸、反式丁烯酸体系的接枝率随单体浓度的增加而增大。10-十一烯酸、油酸体系的接枝率初始时随单体浓度的增加而增大，单体浓度超过0.30mol／L后，接枝率降低。

Grafting of crotonic acid, undecylenic acid, oleic acid, and acrylic acid onto ABS was initiated by benzoyl peroxide in 1, 2-dichloroethane solution.

以过氧化二苯甲酰为引发剂，在1，2-二氯乙烷溶液中进行反式丁烯酸、10-十一烯酸、油酸、丙烯酸接枝ABS树脂。

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