琥珀酸

Epoxysuccinic acid was synthesized from maleic anhydride using sodium tungstate as catalyst and hydrogen peroxide as oxidizer and was characterized by IR and 13 C NMR.

以马来酐为原料，钨酸钠为催化剂，双氧水为氧化剂，合成了环氧琥珀酸，并对其进行了红外、13C核磁表征。

The effects of reaction time, reaction temperature, amount of catalyst, and amount of sodium hydrate on the yield of epoxysuccinic acid were investigated.

考察了实验中影响环氧琥珀酸收率的主要因素，如反应时间、反应温度、催化剂用量及氢氧化钠用量。

We had finished some items such as propanoic acid and acetic acid series antimildew compound. animal and vegctable hydrolyzed protcin. yeastextracts. starch sodium octenylsuccinate. etc.

自成立10年以来，在食品添加剂中开发了丙酸系列、乙酸系列防霉剂，动植物水解蛋白，酵母抽提物，辛烯基琥珀酸淀粉钠等。

In these components, 2-methyl-1-propanol, ethyl acetate, 3-methyl-1- propanol, 2,3-butanediol, phenylethyl alcohol, butanedioic acid diethyl ester, ethyl hydrogen succinate, 2-hydroxy-ethyl propanoic acid and 4-hydroxy-benzeneethanol were main aroma components, these volatile componds provided the typical sensory style of wine.

其中，2-甲基-1-丙醇、乙酸乙酯、3-甲基-1-丙醇、2，3-丁二醇、2-羟基丙酸乙酯、苯乙醇、丁二酸二乙酯、乙基-氢化琥珀酸和4-羟基苯甲醇等成分构成了葡萄酒的主体香气，这些主体香气与其他风味成分一起构成葡萄酒的典型风味特征。

objectiveto investigate the effects of yuegan capsule on ccl4 intoxicated primary cultured rat hepatocytes.methodshepatocytes injury models were induced by ccl4 in rats in vitro, and treated with yuegan capsule.structure of rat hepatocytes and effect of sdh、acpase、g 6 pase activeties and amount of hepatic glycogen were observed.

目的探讨悦肝胶囊对四氯化碳（ccl4）损伤原代培养大鼠肝细胞的保护作用。方法以ccl4诱导大鼠肝细胞损伤模型，观察悦肝胶囊对肝细胞的琥珀酸脱氢酶、酸性磷酸酶、葡萄糖-6-磷酸酶（g 6 pase）活性和糖原含量以及肝细胞形态结构的影响。

Enzyme hepatoma alkaline phosphatase acid phosphatase nucleotidase（5′-Nase） esterase（non-specific esterase） succinic dehydrogenase

肝癌；碱性磷酸酶；酸性磷酸酶；核苷酸酶（5′-核苷酸酶）；酯酶；琥珀酸脱氢酶

The major acid detected in the apple rhizosphere and the wormcast was oxalic acid, malic acid, tartaric acid, succinic acid and malonic acid, one of highest content was oxalic acid.

苹果根际和蚯蚓粪中检测到的有机酸主要有草酸、苹果酸、酒石酸、琥珀酸和丙二酸，以草酸含量为高。

Heating, ethanol precipitation, and ion-exchange chromatographies had been carried out to isolate the protein with specific stimulating activity from newborn calf liver, and [(3)H]thymidine deoxyribose/bromodeoxyuridine incorporation and carboxyfluorescein diacetate succinimidyl ester-based proliferation assay to determine the bioactivity in vitro and in vivo.

通过用加热、乙醇沉淀、离子交换层析等方法来分离新生小牛肝脏中含有特殊刺激活性的蛋白和用胸嘧啶脱氧核糖/溴脱氧尿苷联合羧基荧光素双乙酸钠琥珀酸酯为基础的扩增分析其体内和体外的生物活性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。