非丁

Gamma-aminobutyric acid, a four-carbon nonprotein amino acid, serves as a major inhibitory neurotransmitter in mammalian nervous systems. GABA has several physiological functions such as hypotensive activity, treatment of epilepsy, tranquilizing and allaying excitement, enhancing memory, controlling asthma, regulating hormone secretion, promoting reproduction and activating liver and kidney function.

氨基丁酸(γ-aminobutyric acid，简称为GABA)是一种天然存在的非蛋白质氨基酸，为哺乳动物中枢神经系统中重要的抑制性神经递质，具有降血压、治疗癫痫、镇静安神、增强记忆、控制哮喘、调节激素分泌、促进生殖、活化肝肾等多种生理功能，其制备和应用广受人们的关注与重视。

The effects of nonsolventγ-butyrolactoneon the behavior of phase separation of PC casting solution were studied at different operating temperature according to the LCP correlation.It was found that the phase separation behavior of PC/NMP/γ-GBL also exhibited well agreement with the LCP correlation.Therefore,the maximum content ofγ-GBL in casting solution could be obtained according to the binodal line of the system,which provided scientific basis for the composition of casting solution.

实验进一步考察了不同温度下非溶剂γ-丁内酯对PC铸膜体系相分离的影响，并依据LCP线性回归结果外推计算三元体系的双节线，由此得到了铸膜液体系中非溶剂添加剂的上限含量，为铸膜液体系的构建提供了可靠的依据。

Organic substances (diethylene glycol, glycol methyl ether and methyl ethyl ketone) were used as nonsolvent additives and N-methyl-2-pyrrolidone used as a solvent in membrane preparation. The effects of PPESK concentration, the type of additives and the NSA concentration in casting solution on the morphology and performance of the PPESK hollow fiber ultrafiltration membrane were systematically investigated.

以PPESK为膜材料，NMP为溶剂，水为凝胶剂，选用乙二醇甲醚、一缩二乙二醇和丁酮为非溶剂添加剂，系统研究了聚合物浓度、添加剂种类和含量对PPESK中空纤维超滤膜结构和性能的影响，制备了一系列具有不同孔径和通量的中空纤维超滤膜。

The phase separation behavior of different nonsolvent additives (methyl ethyl ketone, glycol methyl ether and diethylene glycol) on PPESK casting solution was studied at 20℃according the linerized cloud point correlation.

结合线性浊点关系，根据浊点滴定试验，通过三元相图研究了20℃下非溶剂添加剂(丁酮，乙二醇甲醚，一缩二乙二醇)对PPESK铸膜液体系的相分离行为。

The purpose of this study was to objectively evaluate the efficacy of terfenadine.

本试验的目的是客观评价特非那丁的疗效。

Dante is the first important portrayal of Odysseus in a non-classical language.

但丁是第一个以非古典的语言描绘奥德修斯的重要作者。

However, there is a downside to Martin's offbeat effectiveness.

尽管如此，马丁那非比寻常的得分效率其实已经呈现下降趋势。

Results: The retention time of phenacetin, paracetamol and IS were 4.1, 1.4 and 2.8 min, respectively.

结果：非那西丁、对乙酰氨基酚和内标的保留时间分别为4.1、1.4和2.8 min。

Tobacco use, exposure to industrial carcinogens, and phenacetin nephropathy are some of the important etiologic factors

烟草及工业致癌物质是其高危因素，在某些人群中，滥用非那西丁是最重要的致病因素。

Results The average recovery of aspirin, phenacetin and caffeine were 98.7%, 101.4% and 100.4%, respectively.

结果 复方阿司匹林片中阿司匹林、非那西丁和咖啡因的平均回收率分别为98.7%、101.4%、100.4%，RSD值分别为0.7%、1.5%、2.1%。

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。