胺化

The result shows that although it has little surface activity, the different cores and generation of PAMAM, whose terminal group is amidogen, behaves well demulsification. The demulsification of PAMAM for the O/W emulsion is closely connected with the molecular core, terminal group and generation, which provided the foundation to design the new-type demulsifier molecule.

研究结果表明，不同核心、不同支化代的端基为胺基的PAMAM虽然几乎没有表面活性，但却均表现出了良好的破乳性能，PAMAM对O／W型乳液的破乳行为与分子的核心、端基和支化代有密切的关系，为进行这类新型破乳剂的分子设计提供了依据。

METHODS 3-methoxy-7α-methylestra-1,3,5(10)-trien-17β-ol was reducted with lithium and ammonia,then the intermediate was hydrolyzed in oxalic acid and reacted with malonic acid to get 3,3-dimethoxo-7α-methylestra-5(10)-en-17-ol(compound 4),which was oxidated by pyridium bichromate ,reacted with acetylene,and hydrolyzed in oxalic acid again to get the product tibolone.

方法以3-甲氧基-7α-甲基雌甾-1，3，5(10)-三烯-17β-羟基为起始原料经锂胺还原、草酸水解、缩酮化得3，3-二甲氧基-7α-甲基雌甾-5(10)-烯-17β-羟基(化合物4)，然后用温和的氧化剂重铬酸吡啶盐氧化、炔化、再水解得目的产物。

Cyclocitral(α,β cyclocitral ) was synthesized with citral by amination,cyclization and hydrolysis.

以柠檬醛为原料，经胺基化、环化和水解反应合成环状柠檬醛。

In this dissertation, systematic and extensive conformational search has been performed for asparagine and aspartic acid in gas phase and solution and the properties of the stable conformers are studied using DFT based first-principles calculation. The concerned properties include geometry structure, IR spectra, conformer distributions, intramolecular interactions, ionization energies and electron affinities, protonation and deprotonation processes.

在本论文中，我们对天冬酰胺和天冬氨酸在气相和溶液中的稳定构型进行了系统而全面的寻找，并研究了其稳定构型的几何结构、红外光谱、构型分布、分子内相互作用、电离能、电子亲合能、质子化和去质子化过程等相关性质。

From the aspects of mechanical properties, metallurgical analysis and process condition, the brittle causes of inner accessories used in flowing bed for itimeric cyanamide were analyzed in this article.

本文从化学成分，机械性能，金相分析，工艺条件等方面分析了三聚氰胺流化床内件脆化的原因，并提出了消除流化床脆化的措施。

All compounds are synthesized starting from the acylation reaction of gallic acid with L-glutamine to form the basic scaffold, followed by the cyclic reaction in acetic anhydride and the key intermediate cyclic anhydride (compound 4) was obtained. The intermediate compound is condensed with different amino acids or primary amines, and produces the target compounds.

本研究以L－谷氨酸为基本骨架，与甲醚化保护的没食子酸缩合后，经过酰化、环合反应得到关键中间体环状酸酐（化合物4），再经胺解反应合成目标化合物，其化学结构经过红外光谱、电喷雾质谱和核磁共振谱（氢谱、碳谱、碳氢异核多键相关谱）确证。

With the aid of 〓P NMR examination for the process and ESI-MS/MS analysis of the derivatized products from the reaction intermediate, it is found that the corresponding phosphoryl chloride is generated after mixing the hydrogen phosphonate derivative with chlorodiisopropylamine, and they react with amino acid, amino acid methyl ester, dipeptide methyl ester or N-methyl imidazole carboxyl alkyl diamine respectively to form the desired products.

利用〓P NMR对反应过程监测以及对反应中间体衍生化后产物的ESI-MS／MS检测分析发现，氢亚磷酸二酯与氯代二异丙胺反应首先生成了磷酰氯中间产物，它继续与氨基酸、氨基酸甲酯、二肽甲酯、1-甲基咪唑-2-酰基烷基二胺等反应生成了目标产物。

Moreover, the protein-free spreading-free spreading technique, involvingbenzyldimethyl-alkyammonium bromide and the denaturing agent formamide, wasestablished. With very low DNA concentration, the fully extended DNA samples for linearDNA can be prepared.

采用Sephadex色谱柱分离，保温稀释的DNA溶液，不仅可除去DNA链上吸附的盐，而且可使盘绕一起的DNA链部分展开；在此基础上，通过采用苯二甲基辛基溴化胺－甲酰胺微量展层技术，可使纳克级DNA完全展开到云母基底上。

The results showed: when TLC solvent system was: chloroform - methanol - diethyl amine = 90:9:1, alkaloids from lotus leaves were well isolated, and five components were isolated and identified by spraying Dragendorff reagent. The optimal conditions of HPLC solvent system were: methanol- water - diethyl amine = 75:25:0.0125. Under the conditions, components of alkaloids from lotus leaves were separated very well, and ideal RP-HPLC peaks were obtained.5、Methods of High Speed Counter Current Chromatography and preparative High Performance Liquid Chromatography applied to identify and purify alkaloids from lotus leaves were set up. When solvent system of HSCCC was: chloroform - methanol - water (pH=4.00)= 4:3:2, speed of chromatogram was 700rpm, flow speed of the mobile phase was 2mL/min, four pure components relatively were attained by isolation and purification.

结果表明：薄层层析溶剂系统为氯仿：甲醇：二乙胺=90：9：1，使荷叶中的生物碱达到了较好的分离效果，并用改良的碘化铋钾试剂喷雾显色，共分离鉴别出了5种荷叶生物碱；分析型HPLC分析检测的较优溶剂系统为甲醇：水：二乙胺=75：25：0.0125，使荷叶生物碱的各个组分达到了基线分离，并获得了较好的峰形。5、建立了高速逆流色谱和制备型HPLC技术分离纯化荷叶生物碱的具体方法。H(来源：ABC46论文网www.abclunwen.com)SCCC法在溶剂系统为氯仿：甲醇：pH4.00的水=4：3：2，色谱仪转速为700rpm，流动相流速为2mL／min的条件下，分离纯化得到了4个纯度较高的化合物。

N-methylmaleimide was prepared by using dimethyl sulfate as methylation reagent.The paper investigated the addition of N-methyl-3,4-dibromomaleimide and indolylmagnesium bromide,and then 2-bromo-3-(1H-indolyl-3-yl)-N-methylmaleimide and 3,4-bis(1H-indolyl-3-yl-)-N-methyl-maleimide were obtained.

对吲哚在溴乙烷和镁作用下生成吲哚溴化镁，而后与3，4－二溴－N－甲基马来酰亚胺的加成反应进行了研究，合成了2－溴－3－(1H－吲哚－3)－N－甲基马来酰亚胺，并对反应条件进行了改进，研究了反应温度和原料配比对反应的影响。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新