查询词典 acid

A new method for the simultaneous determination of salicylic acid, cinnamic acid, ferulic acid and vanillic acid by stacking-non-aquous-capillary electrophoresis has been proposed.

建立了同时分离测定水杨酸、肉桂酸、阿魏酸和香草酸的电堆集富集-非水毛细管电泳的新方法。

Free organic acid: Vanillic Acid, Cinnamic acid and ferulic acid.

游离有机酸，主要为香草酸﹐桂皮酸﹐阿魏酸。

Used the main eight kinds of phenolic acids with plant-defensive function as a control,and a high performance liquid chromatography to detected the leaves of corn that containing vanillic acid, caffeic acid, syringic acid and coumaric acid.

以植物中主要具有防御功能的8种酚酸作为对照，采用高效液相色谱法测得玉米叶片中主要含有香草酸、咖啡酸、丁香酸及香豆酸4种酚酸类化合物。

Metabolites, including 1 phenolic diterpene, 2 phenolic acids (rosmarinic acid and caffeic acid), 2 flavonoids (6-methoxyluteolin-7-glucoside and homoplantaginin) and 1 coumaric acid ( cis-4-glucosyloxycinnamic acid), were successfully identified from two rosemary extracts with chloroform-methanol ( v / v , 3/1) and 50% aqueous methanol on the basis of HPLC, UV, NMR and MS data.

基于高效液相色谱、紫外吸收、核磁共振波谱及质谱数据，具有代表性的6个迷迭香代谢物的结构得到了确定，它们分别为1个酚类二萜、2个酚酸、2个黄酮（6-甲氧基木樨草素-7-葡萄糖苷和高车前甙）和1个香豆酸(顺-4-香豆酸葡萄糖苷)。

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。

Results show that ascorbic acid and dehydroascorbic acid of cloudy strawberry juice in the storage process are unstable to the heat treatment; the degradation of ascorbic acid and dehydroascorbic acid accords with first-order dynamic, which indicates that this degeneration dynamic model is logical and effective, and can be used in selection of storing temperature and prediction of storage period at different temperatures.

结果表明：草莓浑浊汁在贮藏过程中还原型维生素C和氧化型维生素C对热不稳定，还原型维生素C和氧化型维生素C降解符合一级反应动力学。经过验证表明该降解动力学模型有效，可用于草莓浑浊汁贮藏温度的选择和预测不同温度下的贮藏期。

The relationiships among storage temperature, storage time and degradation of ascorbic acid and dehyd roascorbic acid in the process of cloudy strawberry juice storage were analyzed, and the degradadion dynamic model of ascorbic acid and dehydroascorbic acid was established.

该文通过研究草莓浑浊汁贮藏过程中还原型维生素C和氧化型维生素C的降解与贮藏温度、贮藏时间的关系，建立了还原型维生素C和氧化型维生素C降解动力学模型。

Optimal process conditions for preparing 2-oxo-1-piperazine acetic acid: N,N'-ethylenediamine diacetic acid with hydrochloric acid at a mole ratio of 1 to 2.6 ,was cyclized to form 2-oxo-1-piperazine acetic acid by refluxing for 8 hours.

通过单因素分析，合成S-KP 的最佳反应条件为：在沸腾状态下，回流8小时，HCl∶S-EDDA 的摩尔比为2.6∶1。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。