共查询到19条相似文献,搜索用时 593 毫秒
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草珊瑚醋酸乙酯部位化学成分研究 总被引:5,自引:2,他引:3
目的:对草珊瑚的化学成分进行分离与鉴定,为研究其活性成分提供参考。方法:利用聚酰胺、正相硅胶、Sepha-dex LH-20柱色谱和HPLC进行化合物的分离与纯化,根据化合物的理化性质和波谱数据进行结构鉴定。结果:从草珊瑚70%乙醇提取物中分离鉴定了9个化合物,分别为:异东莨菪素(1),syringaresinol monoside(2),styraxjaponoside B(3),5-O-caf-feoylshikimic acid(4),shizukanolide E(5),异落新妇苷(6),新异落新妇苷(7),落新妇苷(8),新落新妇苷(9)。结论:化合物1~7为首次从该属植物中分离得到。 相似文献
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从落新妇中提取岩白素的新工艺湖南省益阳市医药管理局(413400)龚建夫主题词落新妇/分析岩白菜素/分离和提纯岩白菜素(BergeninumC14H16O9),又名虎耳草素,矮茶素,它是从虎耳草科植物岩白素BergeniaPurpurascens(H... 相似文献
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目的 采用固体分散技术,提高落新妇苷的溶解度及体外溶出速率,并对影响落新妇苷固体分散体质量稳定性的因素进行研究.方法 对固体分散体制备方法、不同的载体、药物与载体间不同比例进行了考察.采用HPLC法检测落新妇苷含量,考察温度、湿度及光照对自制落新妇苷固体分散体的影响.结果 落新妇苷固体分散体能显著改善落新妇苷的溶出效果和溶解度,高温能降低落新妇苷固体分散体中落新妇苷的含量,而强光、湿度未影响落新妇苷固体分散体中落新妇苷的含量.结论 落新妇苷-吐温80-PVP K30比例为1:1.5:3,采用溶剂法制备落新妇苷固体分散体,自制落新妇苷固体分散体可常温保存. 相似文献
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目的:研究红绒毛羊蹄甲Bauhinia aurea的化学成分。方法:应用各种色谱技术进行分离纯化,用MS和NMR分析确定化合物结构。结果:从红绒毛羊蹄甲90%乙醇提取物的醋酸乙酯萃取部位中分离得到8个化合物,分别鉴定为异黄杞苷(1)、落新妇苷(2)、新落新妇苷(3)、异落新妇苷(4)、新异落新妇苷(5)、(2R,3S)-儿茶精 6)、(2R,3R)-表儿茶精(7)和(2R,3R)-3-O-没食子酰表儿茶精(8)。结论:除化合物2,6和8外,其余5个化合物均属首次从该属植物中发现。 相似文献
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Rolland A Fleurentin J Lanhers MC Misslin R Mortier F 《Phytotherapy research : PTR》2001,15(5):377-381
An aqueous alcohol extract of Eschscholzia californica (Ec) has been evaluated for benzodiazepine, neuroleptic, antidepressant, antihistaminic and analgesic properties, in order to complete the study of the sedative and anxiolytic effects previously demonstrated. The plant extract did not protect mice against the convulsant effects of pentylenetetrazol, and did not cause muscle relaxant effects but appeared to possess an affinity for the benzodiazepine receptor: thus, flumazenil, an antagonist of these receptors, suppressed the sedative and anxiolytic effects of the extract. The Ec extract induced peripheral analgesic effects in mice but did not possess antidepressant, neuroleptic or antihistaminic effects. 相似文献
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《Clinical Acupuncture and Oriental Medicine》2003,4(2-3):59-70
Placebo controlled trials are used to examine the relative size of the specific effects of a therapy. When the therapy is a manual treatment like acupuncture, placebo control models are very complex due to the range of non-specific effects that can occur and issues such as blinding. This article examines ten different research models that have been used to control for placebo or other non-specific effects in clinical trials of acupuncture. Through an examination of the different non-specific effects that can occur in acupuncture therapy, it explores the relative ability of these ten models to control for the placebo and other non-specific effects. Three models are eliminated as probably unable to adequately control for these effects and therefore unable to explore the specific effects of acupuncture. The strengths and weaknesses of the remaining seven models are analyzed. Finally, methods and assessments needed to control for non-specific effects are discussed so that these seven models can be used to control for these effects and thus the models can examine the specific effects of acupuncture treatment. 相似文献
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花红胶囊主要药效学研究 总被引:4,自引:0,他引:4
目的:考察花红胶囊抗菌、抗炎、解热、镇痛作用。方法:小鼠感染金黄色葡萄球菌或大肠杆菌,观察死亡率;巴豆油致小鼠耳廓水肿法,棉球致小鼠肉芽肿法,外伤致小鼠足趾瘀血水肿法,观察其抗炎作用;内毒素致家兔发热法观察其解热作用;醋酸致小鼠扭体法、热板法以及大鼠痛经模型观察其镇痛作用。结果:花红胶囊对小鼠感染金黄色葡萄球菌或大肠杆菌后的死亡率有降低的趋势;显著抑制巴豆油致小鼠耳廓水肿反应和小鼠棉球肉芽肿重量;对大肠杆菌内毒素引起的家兔发热也有解热作用;减少小鼠扭体反应次数和大鼠痛经反应的扭体次数,延长小鼠热刺激痛阈。结论:花红胶囊具的药效作用与其功能主治一致。 相似文献
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阐述中药在应用上显现出的毒副作用问题,认为中药的毒副作用不容忽视,并提出相应对策,以保证临床用药的安全有效。 相似文献
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进一步明确中药药性与药理作用的关联关系,该文基于药性组合进行了归肾经中药药理作用特征的相关研究。为中药药性理论与药理作用的相互渗透与结合搭建了桥梁。在归肾经中药药性和药理作用研究基础上,通过整理药性、药理作用相关资料,利用关联规则方法,以归肾经药性组合为目标,挖掘得到相关药性组合所对应的药理作用特征。分析发现不同药性组合的归肾经中药在药理作用上存在明显差异,同时也具有共同的药理特征譬如免疫促进等等。研究以不同药性组合的归肾经中药为载体,将中药传统理论与现代研究成果紧密结合,为进一步发展和丰富中药药性理论奠定了基础,同时也为现代医学发展提供了新的视角。 相似文献
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目的:研究胆木化学成分对HUVEC细胞通透性、ROS生成水平的影响,探讨胆木对HUVEC的保护作用。方法:设有对照组和观察组,通过FITC标记的右旋糖酐(Dextran)试剂盒检测胆木成分对AngⅡ诱导HUVEC单层通透性的影响;以DCFH-DA试剂盒检测胆木化学成分对ROS的抑制作用,采用LPS诱导HUVEC细胞的ROS。结果:胆木生物碱及酚酸类成分对LPS引起的ROS水平增加有抑制趋势,10μg/mL的喜果苷促进作用有统计学意义(P<0.05)。胆木成分具有促进HUVEC细胞通透性增加的作用,其中异常春花苷内酰胺、喜果苷和原儿茶酸对HUVEC细胞通透性有明显的促进作用。结论:胆木抗炎作用可能与其促进活性氧生成及通透性增加有关。 相似文献
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目的:比较薏苡仁两种水提取物的抗炎、镇痛、镇静作用。方法:采用热水煎煮和冷水浸提两种方法分别提取薏苡仁有效部位(记作样品l和样品2)。通过二甲苯致小鼠耳肿胀和角叉莱胶致小鼠足肿胀实验比较两种样品抗炎作用;通过热板法小鼠镇痛实验比较两种样品镇痛作用;通过滚笼法比较两种样品镇静作用。结果:样品1具有明显抗炎、镇痛、镇静作用(P〈0.01),样品2具有镇痛作用(P〈0.05)和兴奋与抑制的双重作用(P〈0.05),无明显抗炎作用。结论:薏苡仁具有抗炎、镇痛、镇静作用,作用强度与提取方法和给药剂量有关。 相似文献
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Gianni Belcaro Morio Hosoi Luciano Pellegrini Giovanni Appendino Edmondo Ippolito Andrea Ricci Andrea Ledda Mark Dugall Maria Rosaria Cesarone Claudia Maione Giovanna Ciammaichella Domenico Genovesi Stefano Togni 《Phytotherapy research : PTR》2014,28(3):444-450
A proprietary lecithin delivery system of curcumin (Meriva) was evaluated in a controlled study to assess its efficacy in alleviating the side effects of cancer chemo‐ and radiotherapy in 160 patients undergoing these treatments. In both cases, a semi‐quantitative evaluation of the side effects was carried out using a visual analogue scale, assessing also the plasma free radical status in all patients. Results showed that lecithinized curcumin might alleviate the burden of side effects associated to chemo‐ and radiotherapy, suggesting that the anecdotal use of various preparations of curcumin as a supportive agent for cancer treatment is well worth a systematic investigation in larger scale clinical trials. The capacity of curcumin to upregulate anti‐oxidative responses and downregulate inflammatory pathways could explain its beneficial effect in tempering the prolonged and systemic oxidative and inflammatory effects of cancer treatment, and the beneficial effects observed in the plasma oxidative status in all patients of the treatment group support this view. © 2013 The Authors. Phytotherapy Research published by John Wiley & Sons, Ltd. 相似文献