氨基化

This paper presents a description of the brief synthesis of hexanoic acid 2-ethyl ester by new methods and its application. It takes two steps and 4.5 h to complete the synthesis of it.

己酸二乙氨基乙醇酯(DA 6)由美国科学家于20世纪90年代初首先发现的一种新型植物生长调节剂，具有高活性，低毒无污染、可与其它农化物质兼容的特点，它的合成与应用研究正日益受到人们的重视[1～7]。

Iminodiacetic acid and aspartic acid reacting with t-butyloxycarbonyl anhydride in the basic solvent system of 1,4-dioxane-water gave better yields than those from conventional t-BuOH/H 2O system method,while glutamic acid in both solvent systems of 1,4-dioxane-water and tetrahydrofuran-water also gave better yield.

其中Boc酐法反应条件温和，操作简便，试剂易得且经济，是实验室制备Boc保护的氨基酸的常用方法。常规Boc酐法多采用叔丁醇水和四氢呋喃水的溶剂体系。我们用常规Boc酐法制备Boc 亚氨基二乙酸时，多次重复，收率总是低于 5 0 %，对天冬氨酸和谷氨酸进行Boc化时也有类似情况。

The polishes for the bottle cover is prepared by the epoxy modified acrylate resin and butylated amino resin.

用环氧改性丙烯酸树脂和丁醚化氨基树脂制备瓶盖用光油。

The results indicate: With the curing temperature of the epoxy resin (E-20) and methanol etherified amino resin at 130℃ and the curing time from 15 minutes to 20 minutes, the curing product owned better curing result, higher tensile strength and best peel properties.

结果表明：环氧树脂(E-20)/甲醚化氨基树脂体系固化温度在130℃，固化时间15~20min，固化效果较好，拉伸性能较高，剥离性能最好。

Objective To study the mechanism of the inbitory effect of matrine on central nervous. Methods In the present study, incubation of postnatal Wistar rat cortex neurons in culture with matrine at 0.5, 1.0, 2.0mmol/L was carried out to have knowledge of the effect of matrine on the expressions of GABAR.

目的 观察苦参碱对鼠原代培养皮质神经元γ-氨基丁酸受体蛋白表达的影响，探讨苦参碱抑制中枢的作用机制方法对Wistar新生大鼠原代培养皮质神经元分别给予剂量 0.5、1.0、2.0mmol/L培养基的苦参碱进行药物干预，4h后用细胞免疫组化方法测定GABAR的蛋白表达。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。