查询词典 crotonic

The synthesis development of crotonic acid by oxidation of crotonaldehyde was reviewed.

综述了巴豆醛催化氧化合成巴豆酸的研究进展。

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。

The density and viscosity were measured by a vibrating densimeter(model DA-505U) and a Ubbelohde suspended-level viscometer at atmospheric pressure for ethyl crotonate + ethanol,crotonic acid + ethanol.

在常压下利用DA-505U型振动管密度仪、乌氏毛细管粘度计测定了巴豆酸乙酯-乙醇、巴豆酸-乙醇两个体系的密度和粘度。

It was used for catalytic oxidation of crotonic aldehyde to crotonic acid .

以浸渍法制备的Al_2O_3负载金属氧化物为催化剂，催化氧化巴豆醛制备巴豆酸。

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。

This consists of the condensation of crotonic ester or sorbic ester with suitable alde- hydes,followed by hydrolysis.

这样，仅用一个步骤便可引进四个或六个碳原子的共轭双键的侧链。

The VFA in the ruminal fluid can be extracted completely by mixing it with chloroform containing an acid adsorbent and also crotonic acid as an internal standard.

瘤胃液仅在存有一种酸性吸附剂的氯仿溶液中，即可萃取出所含全部VFA。

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。

Ninth Five-Year Plan period, the Company conducted a medical intermediates of the pre-development and market research, the introduction of the development of superior strength skin, crotonic acid, crotonic anhydride and other products; also produced 3,3 dimethyl methacrylate, antibiotics raw material products, as well as more than 20 kinds of iso-vanillin and other pharmaceutical intermediates.

九五期间，本公司进行了医化中间体的前期开发和市场调查，引进开发了优力肤、巴豆酸、巴豆酸酐等系列产品；还生产了3，3二甲基丙烯酸甲酯、抗生素原料药系列产品以及异香兰素等二十多种医药中间体。

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。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。