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苍耳子混淆品刺果甘草果实的生药鉴定 总被引:1,自引:0,他引:1
本文对苍耳子的混淆品刺果甘草Glycyrrhiza pallidiflora的果实进行了生药性状、显微特征和薄层层析鉴别,井与正品苍耳子做比较,为鉴别二者提供依据。 相似文献
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石斛及其伪品石仙桃的鉴别 总被引:4,自引:0,他引:4
石斛始载于《神农本草经》,列为上品 ,有益胃生津、滋阴清热的功效。其原植物为兰科植物环草石斛 Dendrobium loddigesiiRolfe.等植物的茎。近年来 ,曾多次发现有将兰科植物石仙桃Pholidota chinesis L indl.的根状茎及假鳞茎伪充石斛入药 ,其药名又称“叶上果”。为避免混淆 ,我们将上述两种药材的形态、组织及化学成分等进行了比较。现分述如下 :1 药材性状1.1 石斛茎呈圆柱形 ,表面光滑或有纵皱纹 ,黄色、黄绿色或暗黄色 ,多节 ,节明显 ,体轻 ,质柔韧 ,味微苦或淡。1.2 石仙桃根状茎圆柱形 ,直径约 3mm,节间 0 .2~ 1cm,被膜质鳞片 … 相似文献
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本文采用薄层层析、荧光分析及紫外吸收光谱对五灵脂及其伪品进行了分析比较,提示出它们内在差别。此法简单易行,区别明显,重现性好,具有一定的实用价值。 相似文献
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山茱萸与伪品野山楂的鉴别 总被引:4,自引:0,他引:4
山茱萸为山茱萸科山茱萸干燥成熟果肉,具有补肝肾、涩精气、固虚脱作用,主治腰膝酸痛、眩晕、耳鸣、阳痿、遗精、小便频数、肝虚寒热、虚汗不止、心摇脉散[1]。在实际工作中,我们多次遇到用野山楂打扁掺杂在山茱萸中出售的情况。本文从性状、显微、薄层三方面对其鉴... 相似文献
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半夏为常用中药,性味辛、温,有毒,具有燥湿化痰,降逆止呕,消痞散结的功效,来源于天南星科植物半夏的块茎。近几年来发现有同科植物水半夏常混淆使用,为了防止伪品的充用对两者的性状特征,显微鉴别,薄层层析,化学成分进行了比较。 相似文献
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目的:研究柘木茎的化学成分.方法:采用硅胶柱色谱和Sephadex LH-20凝胶柱色谱等色谱方法进行分离纯化,并根据NMR,MS等波谱方法和理化性质鉴定其化学结构.结果:从其醇提物中分离得到13个化合物,分别为(3β,13α,14β,17α)-7,24-二烯-3-乙酰羊毛甾醇(1),粘霉烯醇(2),蒲公英萜酮(3),槲皮素(4),山奈酚(5),异鼠李素(6),香豌豆酚(7),3'.甲氧基奥洛波尔(8),花旗松素(9),柑桔素(10),草大戟素(11),1,3,6,7-四羟基口山酮(12),5,7-二羟基色原酮(13).结论:化合物1-3,6,13为首次从柘属中分离得到,化合物12为首次从本植物中分离得到,且首次报道从本属植物中分离得到三萜类成分. 相似文献
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Hwang JH Hong SS Han XH Hwang JS Lee D Lee H Yun YP Kim Y Ro JS Hwang BY 《Journal of natural products》2007,70(7):1207-1209
Four new prenylated xanthones, cudratricusxanthones J-M (1-4), were isolated from the CH2Cl2-soluble extract of the root bark of Cudrania tricuspidata, along with four known prenylated xanthones, isocudraxanthone K (5), cudraxanthone C (6), cudratricusxanthone A (7), and cudraxanthone L (8), and three known prenylated flavonoids, cudraflavone A (9), cudraflavanone A (10), and cudraflavone B (11). The structures of compounds 1-4 were elucidated using spectroscopic methods. Cudratricusxanthone A (7), cudraflavanone A (10), and cudraflavone B (11) showed moderate inhibitory effects on mouse brain monoamine oxidase (MAO) with IC50 values of 88.3, 89.7, and 80.0 microM, respectively. 相似文献
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广东习用桃金娘科水翁的树皮作土槿皮入药。据考证,广东在清代(公元1711年)已开始应用,用于杀虫、治癣,疗效可靠,与正品相仿。为了与正品区别,可称为广东土槿皮入药。本文对土槿皮及广东土槿皮的药材性状,显微特征及紫外吸收光谱进行鉴别,为临床用药、药理及化学成分研究提供鉴定依据。 相似文献
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Lee H Ha H Lee JK Seo CS Lee NH Jung DY Park SJ Shin HK 《Phytotherapy research : PTR》2012,26(4):594-599
The fruits of Cudrania tricuspidata are a medicinal herb in Korea, known for its antiatherosclerotic and antiinflammatory effects. Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by the influx of lymphocytes into the dermis. Using an animal model of AD, we assessed whether C. tricuspidata suppresses the development of AD-like skin lesions. Cudrania tricuspidata was administered orally to NC/Nga mice with Dermatophagoides-farinae-induced AD-like lesions for 49 days. The effects of C. tricuspidata were assessed by measuring clinical symptoms, swelling of the skin on the back and ears, and plasma concentrations of mTARC (mouse thymus and activation regulated chemokine), histamine and immunoglobulin E (IgE). We found that C. tricuspidata (60 mg/kg/day) inhibited the development of AD-like skin lesions, reduced skin dermatitis scores and inhibited the histological changes induced by repeated application of D. farinae. In addition, C. tricuspidata inhibited the increases in plasma concentrations of mTARC, histamine and IgE induced by D. farinae. These findings indicate that C. tricuspidata inhibits the development of AD-like skin lesions induced by repeated applications of D. farinae in sensitized NC/Nga by suppressing plasma concentrations of mTARC, histamine and IgE. 相似文献
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