丁酸

The results showed in the seven food preservative s,that calcium propionate had no effect on the growth of Peronophythoral litchii,while cinnamyl glyceroyl fumarate was the best.

结果表明：在所用的7种食品防腐剂中，丙酸钙对荔枝霜疫霉菌的生长无抑制作用，反丁烯二酸桂醇甘醇酯的抑菌效果最好

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。

ABSTRACT In this paper, by employing dicarboxylic acids with special conformation, i.

利用几个结构上有特点的二元羧酸，即2，6-吡啶二甲酸、三个异构体苯二甲酸，顺丁烯二酸和4，4'-联苯甲酸作为首要桥基配体，并结合使用含氮中性配。。。

A series of segmented thermally stimulated shape-memory polyurethanes, which consist of polyethylene adipate glycolas the soft segment and 4,4'-diphenylmethane diisocyanate-1,4-butanediol-DPA(which consists of ring components) as the hard segment were synthesized by one-step polymerization.

以聚己二酸乙二醇酯二醇为软段、4，4' -二苯基甲烷二异氰酸酯 1，4 丁二醇含环状结构的扩链剂DPA为硬段，采用一步聚合法制备了一种具有热致形状记忆功能的多嵌段聚氨酯弹性体。

In this experiment we use the alcohol to replace the Fumaric acid and using the NaOH and HCl to control the pH number.

而本实验就是以过锰酸钾加入酒精以代替过去使用的反丁烯二酸并以HCl及NaOH来调控其酸碱值并比较其反应后的各种性质。

These include succinic acid and glutaric acids.

琥珀酸和丁二酸是属于这类酸。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。