A novel chiral stationary phase(CysCSP) for ligand exchange chromatography was prepared by firstly synthesizing N,S-di(2-hydroxyl-3-octoxyl)propyl-L-cysteine as chiral selector via reaction of L-cysteine with glycidyl...A novel chiral stationary phase(CysCSP) for ligand exchange chromatography was prepared by firstly synthesizing N,S-di(2-hydroxyl-3-octoxyl)propyl-L-cysteine as chiral selector via reaction of L-cysteine with glycidyl octyl ether and then coating it on YWG-C-{18} bonded stationary phase. The enantiomeric resolutions of some D,L-α-amino acids were achieved on CysCSP by using cupric acetate aqueous solution as the mobile phase, under the conditions of column temperature 20 ℃ and detection at UV 254 nm. The enantioselectivities α of D,L-α-amino acids separated were found to be in the range from 1.11 to 1.38 with the resolution R-s ranging from 1.1 to 2.8 and the column efficiency being from 5 000 to 9 000 n/m. The elution order of D-isomer before L-isomer was obersaved for all D,L-amino acids used.展开更多
目的探讨β-七叶皂甙钠对急性脑梗死患者血管内皮功能、同型半胱氨酸及超敏C反应蛋白及临床疗效的影响。方法将保定市第二医院2013年3月-2015年4月收治的198例患者随机分为观察组（n=100）和对照组（n=98）。对照组根据病情给予对症治疗...目的探讨β-七叶皂甙钠对急性脑梗死患者血管内皮功能、同型半胱氨酸及超敏C反应蛋白及临床疗效的影响。方法将保定市第二医院2013年3月-2015年4月收治的198例患者随机分为观察组（n=100）和对照组（n=98）。对照组根据病情给予对症治疗,治疗组在对照组的基础上给予β-七叶皂甙钠20 mg加入250 m L生理盐水进行静脉滴注,1次/天。连续使用14 d为1疗程。观察比较2组血管内皮功能（FMD）、同型半胱氨酸（Hcy）、超敏C反应蛋白（hs-CRP）的水平以及临床疗效的变化。结果观察组总有效率90.00%,明显高于对照组的71.42%,2组比较差异有统计学意义（χ2=11.01,P〈0.05）。治疗后观察组和对照组分别与治疗前相比,FMD显著升高,Hcy和hs-CRP均显著降低（P〈0.05）;但治疗后观察组与对照组相比,治疗组FMD显著高于对照组,Hcy和hs-CRP则显著低于对照组（P〈0.05）。结论β-七叶皂甙钠治疗急性脑梗死患者临床疗效显著,患者FMD显著升高,Hcy和hs-CRP显著降低。展开更多
文摘A novel chiral stationary phase(CysCSP) for ligand exchange chromatography was prepared by firstly synthesizing N,S-di(2-hydroxyl-3-octoxyl)propyl-L-cysteine as chiral selector via reaction of L-cysteine with glycidyl octyl ether and then coating it on YWG-C-{18} bonded stationary phase. The enantiomeric resolutions of some D,L-α-amino acids were achieved on CysCSP by using cupric acetate aqueous solution as the mobile phase, under the conditions of column temperature 20 ℃ and detection at UV 254 nm. The enantioselectivities α of D,L-α-amino acids separated were found to be in the range from 1.11 to 1.38 with the resolution R-s ranging from 1.1 to 2.8 and the column efficiency being from 5 000 to 9 000 n/m. The elution order of D-isomer before L-isomer was obersaved for all D,L-amino acids used.
文摘目的探讨β-七叶皂甙钠对急性脑梗死患者血管内皮功能、同型半胱氨酸及超敏C反应蛋白及临床疗效的影响。方法将保定市第二医院2013年3月-2015年4月收治的198例患者随机分为观察组（n=100）和对照组（n=98）。对照组根据病情给予对症治疗,治疗组在对照组的基础上给予β-七叶皂甙钠20 mg加入250 m L生理盐水进行静脉滴注,1次/天。连续使用14 d为1疗程。观察比较2组血管内皮功能（FMD）、同型半胱氨酸（Hcy）、超敏C反应蛋白（hs-CRP）的水平以及临床疗效的变化。结果观察组总有效率90.00%,明显高于对照组的71.42%,2组比较差异有统计学意义（χ2=11.01,P〈0.05）。治疗后观察组和对照组分别与治疗前相比,FMD显著升高,Hcy和hs-CRP均显著降低（P〈0.05）;但治疗后观察组与对照组相比,治疗组FMD显著高于对照组,Hcy和hs-CRP则显著低于对照组（P〈0.05）。结论β-七叶皂甙钠治疗急性脑梗死患者临床疗效显著,患者FMD显著升高,Hcy和hs-CRP显著降低。
