A uniform experimental design procedure was used to investigate the effects of some operating parameters on the extraction of emodin from Polygonum cuspidatum Sieb. et Zucc. products. Variables tested were volume rati...A uniform experimental design procedure was used to investigate the effects of some operating parameters on the extraction of emodin from Polygonum cuspidatum Sieb. et Zucc. products. Variables tested were volume ratio of material to solvent, size of material, extraction time and temperature and composition of extraction solvent （mixtures of acetone-water）. Each variable was tested at seven levels; 7 experiments were performed in random order. Analyses of the extracts were performed by high-performance liquid chromatography with diode array detection（HPLC-DAD）. Analytical responses were processed by using a forward regression analysis, in order to find polynomial function describing the relationship between variables and responses. For all the analytes the experimental conditions for providing the highest extraction yield inside the experimental domain considered were found. Finally, a simple, rapid and accurate analytical method was developed for the determination of emodin by high performance liquid chromatography. The separation is achieved within 25 rain on an ODS column using methanol and water as gradient mobiles. Emodin can be quantified by using external standard method detecting at 436 nm. Good linearity is obtained with correlation coefficient exceeding 0.9986 and the detection limit and the quantification limit are 1.53 and 3.23 mg/L respectively. This method shows good reproducibility for the quantification of the emodin with intra-day and inter-day relative standard deviation less than 2.3% and 5.6% respectively. Under optimized extraction conditions, the recovery of the standard is 96.5%. The validated method is successfully applied to quantify the emodin in seven Polygonum cuspidatum sieb. Et zucc. products, which provided an idea for the pre-treatment of determination of active compounds in traditional Chinese medicines.展开更多
Objective A method of TLC-fluorescence spectrophotometry was established to assay the content of polydatin in polygonum cuspidatum sieb. et zucc. Methods: Polydatin was extracted by methanol and separated with chloro...Objective A method of TLC-fluorescence spectrophotometry was established to assay the content of polydatin in polygonum cuspidatum sieb. et zucc. Methods: Polydatin was extracted by methanol and separated with chloroform-acetone-formic acid-water (4∶4∶0.5∶0.2) by thin layer chromatography. The excitation wavelength and emission wavelength were 284 nm and 384 nm, respectively. Results The linear regression equation of the calibration graph was y=7.02179x+4.5143, a linear regression correlative coefficient r=0.9936. Conclusion This method was proved simple, stable and sensitive. It can be used in quality control of herbs.展开更多
目的探讨虎杖对湿热证2型糖尿病患者的临床疗效。方法140例患者随机分为对照组和观察组,每组70例,对照组给予常规治疗,观察组在对照组基础上加用虎杖颗粒,疗程8周。检测体质量、BMI、血糖指标(FBG、2 h PG、HbA_(1C)、GA)、血脂指标(TC...目的探讨虎杖对湿热证2型糖尿病患者的临床疗效。方法140例患者随机分为对照组和观察组,每组70例,对照组给予常规治疗,观察组在对照组基础上加用虎杖颗粒,疗程8周。检测体质量、BMI、血糖指标(FBG、2 h PG、HbA_(1C)、GA)、血脂指标(TC、TG、HDL-C、LDL-C、ApoA-I、ApoB、ApoA、ApoE、sdLDL-C)、肝功能指标(ALT、AST)、脂肪肝程度、TyG、HSI、中医证候评分和疗效变化。结果观察组中医证候总有效率高于对照组(P<0.01),脂肪肝程度更轻(P<0.01)。治疗后,观察组体质量、BMI、FBG、GA、TG、ApoE、TyG、HSI、ALT、中医证候评分降低(P<0.05,P<0.01),并且2 h PG、TyG、HSI、ALT、中医证候评分低于对照组(P<0.05,P<0.01)。结论虎杖可改善湿热证2型糖尿病患者糖脂代谢紊乱,值得临床推广应用。展开更多
基金Project (04JJ3081) supported by Hunan Province Natural Science Foundation of China
文摘A uniform experimental design procedure was used to investigate the effects of some operating parameters on the extraction of emodin from Polygonum cuspidatum Sieb. et Zucc. products. Variables tested were volume ratio of material to solvent, size of material, extraction time and temperature and composition of extraction solvent （mixtures of acetone-water）. Each variable was tested at seven levels; 7 experiments were performed in random order. Analyses of the extracts were performed by high-performance liquid chromatography with diode array detection（HPLC-DAD）. Analytical responses were processed by using a forward regression analysis, in order to find polynomial function describing the relationship between variables and responses. For all the analytes the experimental conditions for providing the highest extraction yield inside the experimental domain considered were found. Finally, a simple, rapid and accurate analytical method was developed for the determination of emodin by high performance liquid chromatography. The separation is achieved within 25 rain on an ODS column using methanol and water as gradient mobiles. Emodin can be quantified by using external standard method detecting at 436 nm. Good linearity is obtained with correlation coefficient exceeding 0.9986 and the detection limit and the quantification limit are 1.53 and 3.23 mg/L respectively. This method shows good reproducibility for the quantification of the emodin with intra-day and inter-day relative standard deviation less than 2.3% and 5.6% respectively. Under optimized extraction conditions, the recovery of the standard is 96.5%. The validated method is successfully applied to quantify the emodin in seven Polygonum cuspidatum sieb. Et zucc. products, which provided an idea for the pre-treatment of determination of active compounds in traditional Chinese medicines.
文摘Objective A method of TLC-fluorescence spectrophotometry was established to assay the content of polydatin in polygonum cuspidatum sieb. et zucc. Methods: Polydatin was extracted by methanol and separated with chloroform-acetone-formic acid-water (4∶4∶0.5∶0.2) by thin layer chromatography. The excitation wavelength and emission wavelength were 284 nm and 384 nm, respectively. Results The linear regression equation of the calibration graph was y=7.02179x+4.5143, a linear regression correlative coefficient r=0.9936. Conclusion This method was proved simple, stable and sensitive. It can be used in quality control of herbs.
文摘目的探讨虎杖对湿热证2型糖尿病患者的临床疗效。方法140例患者随机分为对照组和观察组,每组70例,对照组给予常规治疗,观察组在对照组基础上加用虎杖颗粒,疗程8周。检测体质量、BMI、血糖指标(FBG、2 h PG、HbA_(1C)、GA)、血脂指标(TC、TG、HDL-C、LDL-C、ApoA-I、ApoB、ApoA、ApoE、sdLDL-C)、肝功能指标(ALT、AST)、脂肪肝程度、TyG、HSI、中医证候评分和疗效变化。结果观察组中医证候总有效率高于对照组(P<0.01),脂肪肝程度更轻(P<0.01)。治疗后,观察组体质量、BMI、FBG、GA、TG、ApoE、TyG、HSI、ALT、中医证候评分降低(P<0.05,P<0.01),并且2 h PG、TyG、HSI、ALT、中医证候评分低于对照组(P<0.05,P<0.01)。结论虎杖可改善湿热证2型糖尿病患者糖脂代谢紊乱,值得临床推广应用。
