丁酸

Carbohydrates such as sucrose, glucose, maltose fermentation by Hagan may also be obtained fumaric acid.

碳水化合物如蔗糖、葡萄糖、麦芽糖经黑根菌发酵也可制得反丁烯二酸。

ConclusionThe result provides a technology for the extraction of fumaric acid from Herba Sarcandrae.

结论实验结果为确定肿节风药材中反丁烯二酸提取工艺提供了实验依据。

Using a simple and reliable apparatus,the solubilities of glutaric acid in water,ethanol,toluene,chloroform,n-butanol and acetone are determined by the analytic method.

用平衡法分别测定了戊二酸在水、乙醇、甲苯、氯仿、正丁醇、丙酮中的溶解度数据。

In this article, the solubility datas of solid-liquid phase equilibrium were measured, then the theory of solid-liquid phase equilibrium of succinic acid, glutaric acid and adipic acid in various solvents were studied, finally the separation,recovery and reuse methods of mixed dibasic acids were carried on a systemetical research.

本文在测定固液平衡溶解度数据，并进行丁、戊、己三种二元酸在各种溶剂中固液相平衡理论研究的基础上，对混合二元酸的分离回收方法和三种酸的再利用方法进行了系统研究。

In the forth part, the heterotactic enthalpic pairwise interaction coefficients between amino acids and butanediol isomers (1,3-butanediol, 1,4-butanediol and 2,3-butanediol) at 298.15K and 310.15K are discussed.

第五部分：采用密度泛函理论等方法研究了甘氨酸分子分别与丁二醇的三种异构体分子以1：1的比例形成的氢键络合物，从B3LYP6-31G到6-31 G基组水平进行了优化，利用结合能数据讨论了焓对作用系数的差别。

The extracted components were qualitatively and quantitatively analyzed by gas chromatography mass spectrometry.The results showed that 30,26 compounds were identified from the volatile components extracted by DSE,SDE methods resp.36 kinds of components were extracted by 2 methods in total,among them the content of hexadecanoic aci...

结果表明，从DSE、SDE法提取的挥发性成分中分别鉴定出30(总含量58.24μg/g)、26种化合物总含量(86.66μg/g，2种方法共提取出36种化合物，其中十六酸含量最高，其次为亚油酸、油酸、邻苯二甲酸二异丁酯、间甲苯甲醛、龙脑。

Butyl bromide was synthesized from hydrobromic acid(48%) and 2-butylalcohol by adding concentrated sulfuric acid.

以质量分数为48%的氢溴酸水溶液、仲丁醇为反应原料，浓硫酸为催化剂合成仲溴丁烷，考察了反应原料和催化剂用量以及反应时间对产率的影响。

N-butanol was prepared with bromine and hydrobromic acid in the laboratory.

实验室制备正溴丁烷是用正丁醇与氢溴酸反应制备。

Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.

对苯二甲酸与氯气在碘存在下以发烟硫酸为溶剂进行氯化制备四氯对苯二甲酸；再以DMF为催化剂与二氯亚砜反应生成四氯对苯二甲酰氯；以氟化钾为氟化剂，环丁砜为溶剂置换氟化，再与甲醇酯化得到四氟对苯二甲酸甲酯；以KBH4-LiCl为还原剂二甲醚为溶剂反应制得四氟对苯二甲基苄醇；以氯苯为溶剂在溴化氢溶液中溴化得到溴化产物；在乙醇溶液中经镁粉还原得到4-甲基-2，3，5，6-四氟苄醇；甲基苄醇与功夫酸在催化剂二环己基碳二亚胺和4-二甲氨基吡啶作用下缩合得到七氟菊酯，总收率达43.6%。

It is a major type of maize hydroxamic acidglucoside.

丁布葡萄糖苷是玉米中氧肟酸葡萄糖苷的一种主要类型。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。