共查询到19条相似文献,搜索用时 125 毫秒
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目的:探究干燥雷公藤浸膏的最适温度及最适时间。方法:取两份等量雷公藤浸膏分别在80℃和100℃环境中干燥48h,提取雷公藤浸膏内有效成分(雷酚内酯和雷公藤内酯醇),通过对比确定最适温度和最适时间。结果:对比发现,相同干燥时间内雷公藤浸膏在80℃环境中有效成分损失较少;而雷公藤浸膏在100℃环境中干燥48h后,其有效成分含量下降约1.5-3.0个百分点。结论:适合雷公藤浸膏干燥的温度在80℃以下。 相似文献
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目的优选复方牛蒡子含片最佳水煎工艺,并考察各工艺步骤中牛蒡子苷的含量变化情况。方法以牛蒡子苷提取量为指标,采用正交试验优选影响水煎工艺的主要因素,并对水煎浓缩液、醇沉液及干浸膏中牛蒡子苷进行含量测定。结果优选出牛蒡子最佳水煎工艺为加水12倍,煎煮3次,每次1h,牛蒡子苷在各工艺步骤均有一定量损失。结论本实验为复方牛蒡子含片的生产提供了可靠数据。 相似文献
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目的:建立测定羚羊感冒片中有效成分牛蒡子苷含量的方法.方法:采用高效液相色谱法,色谱柱为Kromasil C18(100 mm×4.6 mm,5μm)柱,流动相为乙腈-水(25∶75),检测波长为278 nm,柱温35℃,流速:0.5 mL·min-1.结果:牛蒡子苷峰面积在0.2989 μg~3.736 μg有良好的线性关系.牛蒡子苷的平均回收率为101.59%,RSD为 0.59%.结论:本方法简便可行,重复性好,可用于羚羊感冒片中牛蒡子苷的含量测定和质量控制. 相似文献
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HPLC法测定凉解感冒合剂中牛蒡子苷的含量 总被引:2,自引:0,他引:2
用高效液相色谱法,以牛蒡子苷为对照品,测定了新药凉解感冒合剂中主要成分牛蒡子所含的牛蒡子苷的含量。牛蒡子苷浓度在3.00~20.48μg/ml范围内有良好线性关系,回收率为100.2%,RSD0.22%(n=5)。 相似文献
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目的 对甘肃部分地区产牛蒡子进行质量评价研究,为完善甘肃产牛蒡子饮片的质量规范提供技术支持。方法 采用HPLC测定牛蒡苷、牛蒡苷元含量;采用UV测定总木脂素含量;采用醚浸出物法测定脂肪油含量。结果 收集到的甘肃地区产8个牛蒡子样品中牛蒡苷含量均达到中国药典标准要求,且甘肃定西、临洮、庆阳、和政和甘南产牛蒡子中所含牛蒡苷、牛蒡苷元、总木脂素及醚浸出物含量均不低于收集到的吉林、银川、康定、河南等地产的牛蒡子。结论 甘肃地区产牛蒡子药材质量较好,牛蒡子可作为甘肃开发引种药材新品种的选择。 相似文献
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从牛蒡(Arctium lappa L.)的根、茎、叶、总苞、种子中分离纯化了57株内生菌。以牛蒡子粉为底物,采用高效液相色谱法定量测定转化培养液中牛蒡子苷和牛蒡子苷元的含量,筛选得到6株转化牛蒡子苷的内生菌。其中L2的转化率最高,可达76.9%。利用LC-MS方法对其转化产物牛蒡子苷元进行了验证。L2经过形态观察、生理生化特征分析及16S rDNA序列分析,鉴定为氧化微杆菌(Microbacterium oxydans)。本试验结果为探索牛蒡内生菌转化牛蒡子苷成主要药效成分牛蒡子苷元技术提供了科学依据。 相似文献
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The pharmacokinetic profile of arctiin, the major active lignan in fruits of Arctium lappa L., was investigated. Its main meta"bolite arctigenin was identified by an LC-MS method, and an HPLC-UV technique was developed for the simultaneous quantification of the metabolite and arctiin in plasma and organs. Chromatographic separation was performed on an Agilent? C?? HPLC column with acetonitrile and water by linear gradient elution. Arctiin and arctigenin were identified on-line by LC-MS. The pharmacokinetics and tissue distribution of arctiin and arctigenin were determined for the first time by using a simple, selective, and accurate HPLC method. The AUC0-t values of arctigenin were larger compared with arctiin after oral administration of arctiin. The concentration of the metabolite was significantly higher than the concentration of arctiin in the stomach and small intestine in rats after oral administration of arctiin, indicating that the stomach and small intestine were the major organs of arctiin metabolism. These findings could provide support for the clinical studies conducted with Fructus Arctii. 相似文献
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目的对甘肃临洮产牛蒡不同部位所含总木脂素及牛蒡苷含量进行测定。方法利用牛蒡子中总木脂素与牛蒡苷在同一峰位有吸收的特点,以牛蒡苷为对照品,以280 nm为测定波长,紫外分光光度法测定牛蒡不同部位总木脂素含量,同时采用HPLC测定其牛蒡苷含量。结果牛蒡苷浓度在0.005 7~0.079 5 mg.mL 1内,吸收度与浓度呈良好线性关系,线性方程为Y=9.244 9X+0.017 2,r=0.999 6,平均回收率98.2%,RSD=1.61%。以牛蒡苷计,牛蒡子中总木脂素含量为12.27%,牛蒡根、牛蒡叶、牛蒡茎中总木脂素的含量均在6%左右。牛蒡子中牛蒡苷的含量为6.19%(n=3),牛蒡根、牛蒡茎、牛蒡叶样品均未检测到牛蒡苷。结论采用紫外分光光度法和HPLC分别测定牛蒡不同部位总木脂素和牛蒡苷含量的方法快速、简捷,可全面控制牛蒡的质量。 相似文献
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Antiproliferative and apoptotic effects of butyrolactone lignans from Arctium lappa on leukemic cells 总被引:5,自引:0,他引:5
In the course of screening for pharmacologically active substances from extracts of crude drugs used traditionally in Sino-Japanese herbal medicines, it was found that the 70 % ethanol extract from the fruits of Arctium lappa L. (Compositae) showed potent antiproliferative activity against B cell hybridoma cell, MH60. By bioassay-guided purification, a new lignan, (+)-7,8-didehydroarctigenin, together with the known lignans (-)-arctigenin and (-)-matairesinol were isolated as the active ingredients from an aqueous ethanolic extract of the fruits of A. lappa. Of these active compounds, (-)-arctigenin showed the most potent antiproliferative activity against MH60 cells (IC (50) : 1.0 microM), and the activity was suggested to be due to apoptosis. 相似文献
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The seeds of Arctium lappa L. (AL, family Asteraceae), the main constituents of which are arctiin and arctigenin, have been used as an herbal medicine or functional food to treat inflammatory diseases. These main constituents were shown to inhibit acetylcholinesterase (AChE) activity. Arctigenin more potently inhibited AChE activity than arctiin. Arctigenin at doses of 30 and 60?mg/kg (p.?o.) potently reversed scopolamine-induced memory deficits by 62?% and 73?%, respectively, in a passive avoidance test. This finding is comparable with that of tacrine (10?mg/kg p.?o.). Arctigenin also significantly reversed scopolamine-induced memory deficits in the Y-maze and Morris water maze tests. On the basis of these findings, arctigenin may ameliorate memory deficits by inhibiting AChE. 相似文献