[Objective] This study aimed to compare the contents of total alkaloids in different solvent extracts from climbing groundsel herb produced in Guizhou Province and their antibacterial activity. [Method] The content of...[Objective] This study aimed to compare the contents of total alkaloids in different solvent extracts from climbing groundsel herb produced in Guizhou Province and their antibacterial activity. [Method] The content of total alkaloids was measured by UV spectrophotometry, and Oxford cups were used to investigate the antibacterial activity of each solvent extract. [Result] There was a good linear correlation between the absorbance measured by the UV spectrophotometer and the content of total al- kaloids within the concentration of 0.011 0-0.054 8 mg/ml at 207 nm, and the re- gression equation was Y=23.654X＋0.021, R=0. 999 7 and the average recovery rate was 99.2%. The contents of total alkaloids in 60% ethanol extract, 95% ethanol and water ethanol were 38.71, 52.25 and 60.50 mg/g, respectively. The 60% ethanol ex- tract had strong antibacterial activity against Streptococcus pneumoniae, Staphylo- coccus aureus and Escherichia coil; the water extractive had stronger antibacterial activity against Escherichia colr, 95% ethanol extract had weak antibacterial activity, with no inhibition of Pseudomonas aeruginosa. [Conclusion] This method is accurate, simple, with good repeatability, which can be used for the determination of alkaloids content of the climbing groundsel herb; there is no positive correlation between the content of total alkaloids in different solvent extracts of climbing groundsel herb and their antibacterial activity.展开更多
将千里光全草粉用体积分数70%乙醇浸泡,经超声波-微波处理,用乙醚萃取脱色,冷冻真空干燥,制备千里光提取物冻干粉(SCE)。以对乙酰氨基酚为对照,采用醋酸扭体法和热板法研究不同剂量SCE的镇痛作用;采用骨髓微核试验研究不同剂量SCE的致...将千里光全草粉用体积分数70%乙醇浸泡,经超声波-微波处理,用乙醚萃取脱色,冷冻真空干燥,制备千里光提取物冻干粉(SCE)。以对乙酰氨基酚为对照,采用醋酸扭体法和热板法研究不同剂量SCE的镇痛作用;采用骨髓微核试验研究不同剂量SCE的致突变作用。结果发现,122.72 m g/kg SCE具有显著的镇痛作用,而130.90 m g/kg SCE对雌雄小白鼠均不具有致突变作用。说明122.72-130.90 m g/kg SCE能同时满足无致突变作用和显著镇痛作用的双重条件。展开更多
基金Supported by the Clinical Scientific Research Capacity Construction Program for Country-level Hospitals of Department of Health,Guizhou Province(gzwxky2011-1-022)~~
文摘[Objective] This study aimed to compare the contents of total alkaloids in different solvent extracts from climbing groundsel herb produced in Guizhou Province and their antibacterial activity. [Method] The content of total alkaloids was measured by UV spectrophotometry, and Oxford cups were used to investigate the antibacterial activity of each solvent extract. [Result] There was a good linear correlation between the absorbance measured by the UV spectrophotometer and the content of total al- kaloids within the concentration of 0.011 0-0.054 8 mg/ml at 207 nm, and the re- gression equation was Y=23.654X＋0.021, R=0. 999 7 and the average recovery rate was 99.2%. The contents of total alkaloids in 60% ethanol extract, 95% ethanol and water ethanol were 38.71, 52.25 and 60.50 mg/g, respectively. The 60% ethanol ex- tract had strong antibacterial activity against Streptococcus pneumoniae, Staphylo- coccus aureus and Escherichia coil; the water extractive had stronger antibacterial activity against Escherichia colr, 95% ethanol extract had weak antibacterial activity, with no inhibition of Pseudomonas aeruginosa. [Conclusion] This method is accurate, simple, with good repeatability, which can be used for the determination of alkaloids content of the climbing groundsel herb; there is no positive correlation between the content of total alkaloids in different solvent extracts of climbing groundsel herb and their antibacterial activity.
文摘将千里光全草粉用体积分数70%乙醇浸泡,经超声波-微波处理,用乙醚萃取脱色,冷冻真空干燥,制备千里光提取物冻干粉(SCE)。以对乙酰氨基酚为对照,采用醋酸扭体法和热板法研究不同剂量SCE的镇痛作用;采用骨髓微核试验研究不同剂量SCE的致突变作用。结果发现,122.72 m g/kg SCE具有显著的镇痛作用,而130.90 m g/kg SCE对雌雄小白鼠均不具有致突变作用。说明122.72-130.90 m g/kg SCE能同时满足无致突变作用和显著镇痛作用的双重条件。
