共查询到19条相似文献,搜索用时 109 毫秒
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目的研究黄精多糖的水提醇沉工艺及含量测定方法。方法采用单因素试验及Box-Behnken Design方法,以提取物中的多糖含量为考察指标,优化最佳提取工艺;利用蒽酮-硫酸法对提取的多糖含量进行测定。试验设计的三因素中,液料比对黄精多糖含量影响极为显著,提取时间对结果有显著的影响,提取温度对结果影响不显著。结果黄精多糖的最佳提取工艺条件为:液料比20∶1(m L/g)、提取时间2 h,提取温度85℃,按照最佳提取工艺条件提取黄精中的总多糖,含量可达12. 50%。结论响应面法优化黄精多糖的提取工艺可靠,具有实用价值,可用于指导生产实践。 相似文献
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目的:考察地骨皮多糖提取工艺,并对多糖含量进行测定.方法:以正交实验考察地骨皮多糖的提取工艺,蒽酮-硫酸法测定多糖含量。结果:较适宜工艺为药材加十倍量水煎煮三次,每次1.5h,水煎液浓缩至一倍量,以80%的乙醇醇沉;多糖含量测定以葡萄糖计在0.04-0.20mg/ml内有良好的线性关系(r=1.0000),平均回雌率为97.34%(n=6),RSD-1.13%,结论:谈工艺省时,成本较低,且得率较高;多糖含量测定方法简便、准确、可行. 相似文献
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大叶白麻叶多糖提取及组分分析 总被引:2,自引:0,他引:2
目的:从大叶白麻中提取多糖,测定多糖含量并分析其单糖组成.方法:采用热水法提取大叶白麻叶多糖,乙醇沉淀,Sevage法脱蛋白,活性碳脱色,采用蒽酮-硫酸比色法620 nm处测定多糖含量,高效毛细管电泳分析其单糖组分.结果:经蒽酮-硫酸比色法测定大叶白麻叶中多糖含量为叶重的0.97%;经高效毛细管电泳分析发现,大叶白麻含至少有9种单糖,其中含量较多的为半乳糖、阿拉伯糖、甘露糖.结论:本法分离大叶白麻叶多糖在HPCE上易实现9个单糖基线分离具有灵敏度高的特点.单糖种类丰富,具有较高的研究和开发价值. 相似文献
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银杏叶多糖提取、纯化及其含量的测定 总被引:18,自引:0,他引:18
目的研究银杏叶多糖的提取纯化及含量测定。方法通过对不同的提取次数、固液比及提取时间等实验,以及对粗多糖纯化的研究,确立各因素条件,采用苯酚-硫酸法测定其多糖含量。结果各因素条件为浸提温度80℃,提取时间3h,固液比1∶30,提取2次,用活性炭纯化。由此得银杏叶中粗多糖的得率为12.2%,纯化后的多糖得率为9.8%。测定提取的粗多糖中多糖含量为35.7%,纯化后的多糖含量为43.3%,多糖含量测定相对标准偏差小于3.0%。结论该方法纯化效果好,测定重现性好,得出银杏叶中多糖含量为4.3%。 相似文献
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新疆枸杞多糖的提取及含量测定 总被引:26,自引:0,他引:26
采用酚-硫酸比色法于490nm波长处测定不同等级新疆枸杞多糖含量。结果表明,新疆枸杞中均含有多糖、并以颗粒大、色红、肉厚的枸杞,其多糖含量较高。 相似文献
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目的采用反相高效液相色谱法对蒙药漏芦花中的绿原酸含量进行测定。方法流动相为乙腈/0.4%磷酸(11:89);检测波长327nm;流速1mL/min;柱温28℃。结果绿原酸在1.417~15.26 g/mL范围内与峰面积呈良好线性关系(r=0.9998),平均回收率为100.93%,RSD=1.17%。结论该方法精密度、重复性、稳定性良好。可为蒙药漏芦花药材质量检控与评价提供实验依据。 相似文献
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Ethnopharmacological relevance
Desmodium gangeticum (L.) DC. and Desmodium adscendens (Sw.) DC. are two important and well explored species of genus Desmodium (Fabaceae (alt. Leguminosae) subfamily: Faboideae). Desmodium gangeticum is used as a tonic, febrifuge, digestive, anticatarrhal, antiemitic, in inflammatory conditions of chest and in various other inflammatory conditions in the Ayurvedic System of Medicine while Desmodium adscendens is widely used for the treatment of asthma in Ghana, Africa.Aim of the review
The aim of this review is to provide comprehensive information on the botany, traditional uses, phytochemistry, pharmacological research and toxicology of Desmodium gangeticum and Desmodium adscendens to explore their therapeutic potential and future research opportunities.Materials and methods
All the available information on Desmodium gangeticum and Desmodium adscendens was collected via electronic search (using Pubmed, SciFinder, Scirus, Google Scholar, JCCC@INSTIRC and Web of Science) and a library search for articles published in peer-reviewed journals.Results
About 25 different species of Desmodium including Desmodium gangeticum and Desmodium adscendens are used ethnomedicinally all over the world. Phytochemical research on Desmodium gangeticum and Desmodium adscendens has led to the isolation of alkaloids, pterocarpans, phospholipids, sterols, flavones and flavonoid glycosides from Desmodium gangeticum and triterpenoid saponins, phenylethylamines and indole-3-alkyl amines from Desmodium adscendens. Crude extracts, fractions and isolated components of Desmodium gangeticum and Desmodium adscendens showed a wide spectrum of in vitro and in vivo pharmacological activities like antileishmanial, immunomodulatory, antiasthmatic, smooth muscle relaxant, anti-inflammatory, anti-ulcer, cardio-protective, antidiabetic, antiamnesic, antiviral, antioxidant and hepatoprotective activities.Conclusions
Desmodium gangeticum and Desmodium adscendens have emerged as a good source of traditional medicine. Desmodium gangeticum possesses the ability to scavenge the free radicals generated during ischaemia and ischaemia reperfusion thereby preserving the mitochondrial respiratory enzymes that eventually lead to cardio-protection and has potential prophylactic and therapeutic efficacy against Leishmania infection. Desmodium adscendens is useful against chronic bronchitis and asthma. However, there is a need to search for individual secondary metabolites responsible for these actions and study their mode of actions, bioavailability, pharmacokinetics and physiological pathways in sufficient detail. The promising results should be further substantiated by clinical trials. 相似文献18.
Tian-Yi Xia Yi Wang Yan-Ni Yang Wu-Jing Wang Zi-He Ding Ren-Xing Zhong Ying Chen Wei Li Ming-Ming Peng Chuan-Qiu Li Li-Feng Shang Bing Liu Zhen-Yue Wang Chong-Rong Shi Zun-Peng Shu 《World Journal of Traditional Chinese Medicine》2023,(2):167-177
Objective: As a traditional medicinal plant listed in the Chinese Pharmacopeia, Physalis alkekengi L. var. franchetii(Mast.) Makino(PAF) has a long medicinal history and high economic value. PAF has immunomodulatory properties and can be used to treat acute lung injury and eczema.The aim of this study is to solve the problems of extraction and purification of active components from PAF. Materials and Methods: The solvent to be used for extraction and its concentration, the solid-to-liquid ratio,... 相似文献
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目的:检测一点红药材中氨基酸成分,并检查其中重金属与有机氯农药残留,为药材质量标准研究提供依据。方法:用氨基酸分析仪,检测一点红药材中氨基酸成分,并对其水解氨基酸和游离氨基酸含量进行比较;用原子吸收、原子荧光光谱仪,测定一点红药材中铅、镉、砷、汞、铜五种有害重金属元素;用气相色谱仪,测定一点红药材中三种有机氯农药残留。结果:一点红药材中共鉴定出17种氨基酸成分,其水解氨基酸总量远高于游离氨基酸总量;检出一定量的重金属元素;有机氯农药残留未检出。结论:一点红药材中含部分氨基酸,氨基酸主要以结合状态存在;该药材对某些重金属元素有一定的富集能力。 相似文献