propionic acid

In the experiment, ethyl propionate was synthesized by reaction of propionic acid with absolute ethyl alcohol in the presence ofp-Toluene sulfonic acid.

以丙酸和无水乙醇为原料，对甲苯磺酸作催化剂合成了丙酸乙酯。

By using sodium hydrogen sulfate as the catalyst , benzyl alcohol and propionic acid reacted to propionate.

选用乙醇和水作为溶剂,实现亚硫酸氢钠对异氰酸酯的良好封闭.

Hydrogen production from glucose, fructose, galactose and arabinose by propionic acid type fermentation flora was investigated by batch culture.

探讨了丙酸型发酵菌群对葡萄糖、果糖、半乳糖和阿拉伯糖等四种单糖的发酵产氢特性。

The Crystal Structures and Thermal Stability of the Complexes of 2-Oxo-propionic acid ( 4-pyridinecarbonyl) hydrazone with Alkaline Earth Metals

2-羰基丙酸（4-吡啶甲酰基）腙与碱土金属配合物的晶体结构及热稳定性

Effect of different ratios of propionic to acetic acid on phosphorus removal by an enriched culture of phosphorus accumulating organisms

乙酸丙酸比例对富集聚磷菌生物除磷系统影响研究

preparation of propionic acid by propionaldehyde oxidation

丙醛氧化制丙酸

The analysis of propionic acid in carbonylation liquid of ethanol by gas chromatography using column in filled with GDX 103 were studied.

采用GDX103高分子多孔微球为固定相，气相色谱法测定乙醇羰化液中丙酸含量。

propionic acid type fermentation, butyric acid type fermentation and ethanol type fermentation are three typical fermentation types during anaerobic acidogenic process of organic wastewater, and have different ability for hydrogen production.

通过连续流搅拌槽式反应器的运行，比较了丙酸型发酵、丁酸型发酵和乙醇型发酵等3种不同有机废水产酸发酵类型的产氢能力。

In VFA, aluminum compounds have more serious inhibitation to acid and butyric acid contrasting propionic acid.

试验后通过对厌氧微生物液体培养基VFA组分的测定,发现铝盐对乙酸和丁酸的抑制作用较丙酸更强烈些.

Starting from toluene diisocyanate ( TDI), polypropylene glycol ( PPG) and dimethylol propionic acid ( DMPA), the anionic water-borne polyurethane emulsion was synthesized.

以甲苯二异氰酸酯（TDI）、聚丙二醇（PPG）、二羟甲基丙酸（DMPA）为原料，制备了阴离子型水性聚氨酯乳液。

Association Mechanism for Extraction of Propionic Acid by Trioctylamine

三正辛胺与丙酸的萃取机理

OBJECTIVE To investigate the major metabolites of eugenol ibuprofen ester propionic acid.

目的研究鉴定丁香酚布洛芬酯在大鼠体内的代谢行为.

Research Progress on Propionic Acid Accumulation and Control in Anaerobic Digestion System

厌氧消化系统中丙酸积累及控制研究进展

the effects of calciferous salts and propionic acid added to the artificial diet on growth and development of bombyx mori

人工饲料中几种钙盐及丙酸适宜添加量对稚蚕生长发育的影响

The N of indole-3-propionic acid is protected by pivaloyl chloride, and then thionyl chloride and aluminum chloride for acylation cyclization. 2.

用特戊酰氯对吲哚-3-丙酸上的N进行保护，然后用氯化亚砜和三氯化铝进行酰化反应关环。

A salt or an ester of propionic acid.

一种酸性酒石酸盐,氢的酒石酸盐.

yellow water, as the by-product during the production of liquor, was used as the substrate to produce propionic acid. analysis of caproic acid fermenting liquid and organic acids in yellow water(ⅰ)

研究了固定化丙酸菌利用黄水发酵产丙酸。己酸发酵液和黄水中有机酸分析（第一报）

Determination of Propionic Acid, Malic Acid and Citric Acid in the Soil by Gas Chromatography

气相色谱法测定土壤中丙酸、苹果酸、柠檬酸

Frankia sp Cel 517 can show higher nitrogenase activity in a defined medium containing propionic acid as C_source.

由木麻黄（CasuarinaeguisetifoliaL）根瘤中分离的内生菌FrankiaspCel517菌株，可在以丙酸为碳源的限定培养基中表现出较高的固氮酶活性。

Propionic acid is product heavily short of in our country.

丙酸是目前国内十分紧缺的一种产品.

Ionomer-type of polyurethane ( PU) emulsion was prepared from toluene diisocyanate, polypropylene glycol and dimethylol propionic acid, following a self-emulsification process. The modified PVC emulsion resin was obtained by in-situ emulsion copolymerization using PU as seeds in an autoclave.

由甲苯二异氰酸酯、聚醚和二羟甲基丙酸合成了自乳化阴离子水性聚氨酯（PU），以此为种子在高压釜中进行氯乙烯原位接枝共聚制备PU/PVC复合乳液树脂。

When supplied level in-100 mEq/ kg and-150mEq/ kg, there were remarkable differences about acetic acid density, propionic acid density and acetic acid/ propionic acid proportion ( P < 0.05).

当添加水平在-100mEq/kg和-150mEq/kg时，对乙酸浓度、丙酸浓度及乙酸/丙酸比例影响差异均为显著（P

Propionic acid and its derivatives are widely used and imported every year in China.

而乙、丙酸及其衍生物因具有广泛的用途,每年在我国需大量进口.