查询词典 succinic acid

Based on the problem of various types of catalyst and according to the features of carbonylation catalysts reactions, our team has been designed a series of new metal complexes of benimidazoles, which can be used for carbonylation catalyst of industry. Seven new benzimidazole derivatives were prepared by the o-phenylenediamine、oxalic acid、glycolic acid、monomethyl monopotassium malonate、ethyl cyanoacetate、succinic anhydride. The structures of them were confirmed by IR、Elemental analsis. The crystal structures of d and e were determined by X-ray single crystal diffraction of Germanic Bruker Smart APEX II CCD. The catalysis of them was tested by carbonylation reactions.

本文设计以邻苯二胺和草酸、羟基乙酸、丙二酸单甲酯、氰基乙酸乙酯、丁二酸单甲酯为原料采用PPA催化和无机酸催化法，合成了4种苯并咪唑-2-羧酸衍生物并进行了表征；培养了2个化合物d、e的晶体并测定和讨论了晶体结构；制备了3种未见报道的苯并咪唑金属配合物，对配合物在羰基化法制醋酐-醋酸反应的催化作用进行了初步试验。

Good linearities were obtained for nine organic acids, and the detection limits were 0.5 mg/L, 0.3 mg/L, 1.5 mg/L, 1.5 mg/L, 0.3 mg/L, 0.3 mg/L, 0.4 mg/L, 0.4 mg/L, 0.4 mg/L for malonic, formic, tartaric, malic, succinic, glutaric, acetic, lactic and glutamic acid, respectively.

cm为分离通道，在6 min内实现了9种酸的完全分离。9种有机酸的浓度与其峰面积在一定的范围呈良好的线性关系，检出限均低于1.5 mg/L，迁移时间和峰面积的日内、日间相对标准偏差均小于6%。

The novel reaction to create 6,7-dimethoxy-1-(3,4-dimethoxyphenyl)-4-hydroxy-naphthalene 83 in one-pot procedure was found during the synthesis of diphyllin, which started from catechol dimethylether and succinic anhydride and involved heating the molten mixture of the two reactants in the presence of polyphosphoric acid at 140℃.

这个反应是用邻苯二酚二甲醚和丁二酸酐为原料，把两个原料的混合物熔融后，加入PPA，在140℃下搅拌后就会有产物生成。

High molecular weight poly was obtained from succinic acid and 1,4-butanediol through a polycondensation process.

以丁二酸、丁二醇为原料，通过直接缩聚反应合成了高分子量聚丁二酸丁二醇酯。

COD removal for succinic acid degradation was at the range of 54.4～98.3％ for different catalysts in 30 min.

催化剂在30 min内对丁二酸降解的COD去除率为54.4～98.3％。

At last,in order to lighten the electrophoretic particles,0.2 g of the succinic acid modified SiO_2 particles were dispersed at 90 ℃ in 50 mL xylene solution dissolving 0.1 g polyethene,cooled and kept for 12 h,and then the particles were encapsuled by PE by means of centrifugal sedimentation at(10 000) r/min.

最后，为降低电泳颗粒密度，将0.2 g经丁二酸改性的S iO2颗粒，于90℃时加入已溶解了0.1 g 聚乙烯的50 mL二甲苯中，冷却静置12 h后，以10 000 r/m in的速度离心，使PE沉积包覆于电泳颗粒表面。

Plackett-Burman design was used to evaluate the effects of eleven factors for succinic acid production by Escherichia coli NZN111.

采用Plackett-Burman设计法(Plackett-Burman， PB)对影响Escherichia coli NZN111厌氧发酵生产丁二酸的11个因子进行了筛选。

SnSO_4 shows high catalytic activity in the dehydration of ethyl acetate and the esterification of succinic acid.

其次，SnSO_4在这三个液相有机反应中的稳定性均不如其在对苯二酚烷基化反应中的稳定性。

Who suggested that the capacity to produce glycerol and succinic acid is a hereditary characteristic of the genus Saccharomyces.

1995，提议能力生产丙三醇和 2是类酵母菌旳─个遗传性特征。

The first order kinetic models based on subsection were setup to characterize the catalytic wet oxidation of succinic acid.

建立了丁二酸催化湿式氧化的一级分段动力学模型。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。