a dicarboxylic acid (C4H6O4) active in metabolic processes

results showed that corn steep liquor (csl) can instead of yeast extract as a nitrogen source of succinic acid fermentation.

结果表明玉米浆可以替代酵母膏作为丁二酸发酵的廉价氮源。

objective a capillary electrophoresis with conductivity detection method to determine succinic acid in pheretima aspergillum was described.

目的建立毛细管电泳电导法测定广地龙中琥珀酸含量的方法。

prednisolone, used as a model drug, was covalently coupled with various molecular weight lmwcs via a succinic acid spacer.

以泼尼松龙为模型药物，通过丁二酸间隔基与这种壳聚糖共价结合。

succinic acid is an important chemical material with a big market.

琥珀酸是一种重要的化工原料，具有广阔的市场。

this enzyme catalyzes the oxidation of succinic acid .

这种酶催化琥珀酸的氧化。

synthesis of dimethyl succinate from succinic acid and methanol on cation exchange resin nkc-9 was studied under adsorption dehydration with 3a zeolite adsorbent.

以阳离子交换树脂nkc-9固体酸为催化剂、丁二酸和甲醇为原料，采用分子筛吸附脱水技术合成丁二酸二甲酯。

using solvent to extract succinic acid in and tartaric acid in chemical nikel plating liquid.

化学镀镍液的中琥珀酸、酒石酸用溶剂萃取法去除。

high relative molecular mass poly(butylene succinate)(pbs) was synthesized by direct polycondensation of succinic acid and 1,4-butanediol in decalin solution at 140~200 ℃ for 12~14 h.

以丁二酸和丁二醇为原料，十氢萘为溶剂，在140~200℃反应12~14h，进行直接聚合，合成了高相对分子质量聚丁二酸丁二醇酯（pbs）。

succinic acid disodium salt hexahydrate;

丁二酸二钠（六水） ；

dibutyl succinate was synthesized catalyzed by a strong acid cation exchange resin from succinic acid and n-butyl alcohol.

研究了强酸性阳离子交换树脂催化合成邻苯二甲酸线性高碳醇酯的方法。

succinic acid dehydration is one of industrial methods to produce succinic anhydride.

丁二酸脱水法是工业生产丁二酸酐的方法之一。

conclusions:the two-step fermentation technology is worth extending to industrial production of succinic acid from crop straw.

结论：秸秆制备丁二酸的两步发酵法工艺具有工业推广价值。

succinic acid diisopropyl ester;

丁二酸二异丙酯；

further, the composition of the invention is free from tartaric acid or salts thereof and from succinic acid and salts thereof as buffering agents and does not contain amino acids as stabilizer.

此外，本发明组合物不含作为缓沖剂的酒石酸或其盐和琥珀酸及其盐，并且不含作为稳定剂的氨基酸。

it is very important to optimize the fermentation technology of actinobacillus succinogenes for the industrial bioconversion of succinic acid from crop straw.

该文对产丁二酸放线桿菌的发酵工艺优化，为工业规模的农作物秸秆生物转化制备丁二酸提供重要指导。

an innovative system of rp-hplc method was proposed and optimized for detecting the organic acids and hydrosoluble vitamins in succinic acid fermentation broth.

采用高效液相色谱法（hplc）同时检测丁二酸发酵液中的有机酸和水溶性维生素。

this method was proved to be a rapid, effective way to determine the organic acid in succinic acid fermentation broth of actinobacillus succinogenes .

经多次实验结果证明：本方法是测定琥珀酸发酵液中各有机酸的快速、有效的定量测定方法。

great amount of acetic acid, citric acid and succinic acid were excreated. the ratio of intracellular and extracellular citric acid concentration was even lower than 0.1 in early stage.

乙酸、柠檬酸与琥珀酸一直都大量出现在胞外，如柠檬酸胞内胞外浓度比值初期低于0．1。

several succinic acid polyester polyols were synthesized and used to prepare polyurethane elastomers having excellent solvent resistance.

合成了一种新系列丁二酸多元醇聚酯，并用它合成出耐酮类溶剂的聚氨酯弹性体。

citric acid, dl-malic acid, succinic acid and acetic acid were the main organic acids existed in the apple vinegar.

主要存在的有机酸为柠檬酸、dl-苹果酸、琥珀酸和乙酸。