查询词典 acid

At the same time, for the alternatives, another set of devices was also set up according to balanced method. From above two experiments, we got solubility datas of succinic acid, glutaric acid and adipic acid in six solvents of water, ethanol, n-butanol,choloroform, acetone and toluene, of which most were measured for the first time.

由合成法和平衡法实验测定了丁二酸、戊二酸和己二酸三种溶质在水、乙醇、正丁醇、氯仿、丙酮、甲苯六种溶剂中的溶解度数据，其中大部分体系和溶解度数据是首次测定。

Glycerolgenesis. Organic acids was mainly produced during growth phase, acetic acid was the highest, about 1. 6g/L. When the amount of acetic acid and α-Keto glutaric acid was increased slightly and others decreased a bit in 〓 process. The kinds and amount of arganic acide during microbial glycerol production in C.

有机酸主要是菌体生长过程产生的，在酵母生长达平衡期时乙酸积累达最高值1.6g/L，乳酸、丙酮酸、酮戊二酸、苹果酸也都达较高浓度，此时相应的pH降低至最低，随着发酵进行其中乙酸和酮戊二酸略有增加，而其它有机酸是减少的。

The paper mainly include four parts of reseaching in extraction and purification of effective components from the mixed bovine and ovine bile :(1) Established a reliable suitable small-experiment technology route, which is used to be extracted and separated Taurine, Cholic acid, Glycocholic acid and Taurocholic acid, by improving and perfecting the original technology and magnifying the experiment scale at the base of the previous research in our laboratory.

内蒙古农业大学，基础兽医学，2009年，博士

In this process, the electrolylic bath with cationic exchange membrance and leas electrode is used. The cathode liquor is oxalic acid, the anode liquor is diluted sulfuric acid. The process above has following advantages with high yield, top quality, lower cost, no "three wastes" pollution, and no oxalic aldehyde in the product. It is a cleaner and environment-friend technology, and is a development trend for production of glyoxalic acid. Complete analytical process for raw materials, intermediate and final products were established.

本论文通过对乙醛酸合成路线的研究，确定了草酸电解法制乙醛酸的工艺路线，此法采用装有阳离子交换隔膜和铅电极的电解槽，阴极电解液为草酸溶液，阳极电解液为稀硫酸，该工艺具有产品收率高、质量好、成本低、无三废污染、产品中无乙二醛等特点，是一条清洁、绿色工艺，是生产乙醛酸的主要发展方向。

The nanocrystalline film was composed of a three-diminsional network of interconnected particles.Reodx behavior and electrocatalytic activities of the Ti/nano-TiO2 electrode were investigated by cyclic voltammetry from oxalic acid and nitrobenzene to glyoxalic acid and p-aminionphenol. The Ti/Ti redox system,as a medium,shows highly electrocatalytic activities and stable characteristic to indirect electroreduction of organic compounds(e.g.:oxalic acid and nitrobenzene).

循环伏安法研究了纳米TiO2膜电极对草酸还原为乙醛酸、硝基苯还原为对氨基苯酚反应的电催化活性，结果发现纳米膜中的Ti/Ti氧化还原电对起一种中介作用，可使有机物如草酸和硝基苯间接电还原，且电极催化活性高，性能稳定。

As an intermediate for preparing vanillin derived from glyoxylic acid, 3, 4-dihydroxymandelic acid is synthesized based on condensation of catechol and glyoxylic acid in alkaline aqueous solution.

以邻苯二酚和乙醛酸为原料，在碱性条件下发生缩合反应，合成了3， 4-二羟基扁桃酸，此物质是多种香料和药物合成的重要中间体。

Since 2002, Institute of Coal Chemistry, Chinese Academy of Sciences has been developing a new technology to prepare high-purity glyoxylic acid by maleic anhydride ozonation, which has been completed, and now the research of the downstream products of glyoxylic acid including vanillin, heliotropin and the substituted mandelic acid is underway.

中科院山西煤化所从2002年开始进行研究，完成顺酐臭氧化法制备高纯乙醛酸新技术工艺的开发，现正进行乙醛酸下游产品香兰素、洋茉莉醛、取代扁桃酸的技术研究。

It contains abundant dainty substances as nucleotide, guanylic acid, inosinic acid, polypeptide and amino acid, as well as plenty of vitamin B complex.

其核苷酸、鸟甘酸、肌苷酸及多肽和氨基酸等美味物质异常丰富，还含有大量的维生素B群。

By the The equipment,The ratio in use of resin was increased inside VC manufacture , less acid, alcali and water was spend, The operator make less error then before due to automatization level was increased. So the production level of the gulonic acid was increased,The cost price of the gulonic acid was reduced, It is very important to increase greatly the economic effectiveness of the enterprise.

使用该设备系统可提高VC生产中提取工序的树脂用率，减少树脂使用过程中的酸、碱及水的消耗，同时自动化水平提高，人为失误减少，最终可提高古龙酸的生产水平，降低古龙酸的生产成本，对大幅度提升企业的经济效益有重大意义。

Cess conditions,parameters and improvement on the production equipments for sythesizing oxalic acid under the oxidizing reaction by nitric acid with the waste mother liquid of gulonic acid as the raw material.

以古龙酸废母液为原料，在硝酸的氧化下生产草酸，开发了废水综合利用的新工艺。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。