共查询到19条相似文献,搜索用时 78 毫秒
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正交实验优化异甘草素超声提取工艺 总被引:2,自引:0,他引:2
采用超声法提取乌拉尔甘草中异甘草素,通过乙醇体积分数、液固质量体积比(g/mL)、超声提取时间和提取次数4个因素对异甘草素提取率的影响进行了正交实验,确定超声提取最佳工艺条件为:体积分数80%乙醇,液固质量体积比(g/mL)10∶1,超声20 m in,提取3次,异甘草素的提取率为0.37‰,是乙醇热回流提取的2.06倍,是索氏提取的1.54倍。超声提取浸膏中异甘草素的质量分数为0.55%,是乙醇热回流提取的3.24倍,是索氏提取的1.45倍。结果表明:超声提取甘草中异甘草素具有提取温度低、速度快、提取率高、纯度高等特点。 相似文献
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甘草素与异甘草素分离研究 总被引:2,自引:0,他引:2
甘草素、异甘草素系甘草中黄酮类化合物,由于它对艾滋病病毒的增殖有抑制作用,故在临床应用及分离手段方面受到普遍重视。因其在甘草中含量较少,国外一般采用高效液相色谱法分离,而国内采用柱层分离法。本文对其薄层条件进行实验探讨。 相似文献
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对异甘草素的合成工艺进行优化和体外清除自由基活性进行研究。通过间苯二酚、冰醋酸、对羟基苯甲酸合成异甘草素,考察物料比、温度、反应时间对产率的影响,通过紫外分光度法对其清除自由基活性进行研究。酚与酸物料比1∶2.5,240 W微波辐射3 min,2,4-二羟基苯乙酮产率最高为65.75%;当醛酮物质的量比为3∶1,温度控制在120~130℃,回流6 h,异甘草素产率最高为28.10%;反应时间控制20 min,异甘草素加入量为1.00 m L清除DPPH自由基能力最强,为66.4%。异甘草素具有一定的抗自由基活性。 相似文献
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为了制备甘草超滤液中异甘草素,建立一种络合萃取-反萃取方法。以异甘草素萃取率为研究指标,通过单因素和析因设计实验,优选得到最佳络合萃取剂;以异甘草素的反萃取率为研究指标,优选得到最佳反萃取剂。最佳三元络合萃取剂组成为0.5%三烷基氧化膦(TRPO)+10%磷酸三丁酯(TBP)+89.5%磺化煤油,萃取率99.23%,萃取后收率100%;最佳反萃剂为0.010 0 mol×L-1NaOH水溶液,反萃取率97.85%,反萃取后收率95.11%,总收率95.11%。结果表明:优选的络合萃取剂和反萃取剂萃取效率高,甘草超滤液中的异甘草素在络合萃取剂和反萃取剂中可以高效转移,络合萃取-反萃取法适合甘草超滤液中异甘草素的制备。 相似文献
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以10μm硅胶为基质,异甘草素为配体,采用液相连续反应法及中间体法依次合成了异甘草素键合硅胶固定相ISLSP-Ⅰ和ISLSP-Ⅱ。采用FTIR及SEM对合成的固定相进行表征。将ISLSP-Ⅰ固定相填充于50 mm×10 mm i.d. 1号色谱柱中,将ISLSP-Ⅱ固定相填充于30 mm×10 mm i.d. 2号色谱柱中,系统评价了两种方法合成的固定相的色谱性能。结果表明:两根色谱柱的柱效及峰型均较好,大流速下测试组分的保留主要决定于传质阻力。在甲醇-水体系下,2号色谱柱表现出明显的反相色谱分离机制。合成的固定相稳定性良好,使用6个月后,测试组分在两根色谱柱上的保留时间相对偏差不超过0.9%。2号色谱柱对多组分标准样品及中药提取物均具有良好的分离能力。 相似文献
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从甘草中提甘草酸不同提取方法的比较 总被引:18,自引:0,他引:18
对几种不同的从甘草中提取甘草酸的提取方法进行了实验比较。结果表明,微波辅助提取法与热回流法、索氏(Soxhlet)提取法、室温提取法等传统方法相比,具有提取高效、快速、完全及节省时间、溶剂和能 耗等优点,是一种适于从甘草中快速提取甘草酸的新方法。 相似文献
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ABSTRACT
Glycyrrhiza uralensis
Fisch is homologous medicine for food plant and health-protective affection in the human body system. To further understand the functions of G. uralensis Fisch, separation of the bioactive compounds from this natural product is very important. A general three-liquid-phase flotation (TLPF) technique was established to separate and concentrate five bioactive compounds from G. uralensis Fisch. The three-liquid-phase system, pH of initial aqueous phase, (NH4)2SO4 concentration, nitrogen flow rate, and flotation time were investigated. The flotation efficiency of liquiritin apioside, liquiritin, and glycyrrhizic acid in the middle phase and semilicoisoflavone B and licoisoflavone B in the upper phase could reach 91.24%, 94.23%, 88.04%, 94.67%, and 96.44%, respectively. Furthermore, the established TLPF was used for separation of four kinds of anthraquinones from Cassiae Semen. The results showed that TLPF is feasible for separating the compounds with quite a different polarity from natural products. 相似文献14.
天然功效成分的提取及其在漱口水中的运用 总被引:1,自引:0,他引:1
文中简单介绍了从田七、绞股兰、甘草等中草药中提取天然功效成分的方法,阐述了天然功效成分在漱口水产品中的运用研究。临床试用试验结果表明:研制的漱口水产品对牙周炎、牙龈炎和冠周炎等口腔疾病患者具有止病、止血及促进愈合的作用,有效率达91%。 相似文献
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Eun Ju Lee Sibhghatulla Shaikh Khurshid Ahmad Syed Sayeed Ahmad Jeong Ho Lim Soyoung Park Hye Jin Yang Won-Kyung Cho Sang-Joon Park Yong-Ho Lee So-Young Park Jin-Yeul Ma Inho Choi 《International journal of molecular sciences》2021,22(2)
Skeletal muscle is the most abundant tissue and constitutes about 40% of total body mass. Herein, we report that crude water extract (CWE) of G. uralensis enhanced myoblast proliferation and differentiation. Pretreatment of mice with the CWE of G. uralensis prior to cardiotoxin-induced muscle injury was found to enhance muscle regeneration by inducing myogenic gene expression and downregulating myostatin expression. Furthermore, this extract reduced nitrotyrosine protein levels and atrophy-related gene expression. Of the five different fractions of the CWE of G. uralensis obtained, the ethyl acetate (EtOAc) fraction more significantly enhanced myoblast proliferation and differentiation than the other fractions. Ten bioactive compounds were isolated from the EtOAc fraction and characterized by GC-MS and NMR. Of these compounds (4-hydroxybenzoic acid, liquiritigenin, (R)-(-)-vestitol, isoliquiritigenin, medicarpin, tetrahydroxymethoxychalcone, licochalcone B, liquiritin, liquiritinapioside, and ononin), liquiritigenin, tetrahydroxymethoxychalcone, and licochalcone B were found to enhance myoblast proliferation and differentiation, and myofiber diameters in injured muscles were wider with the liquiritigenin than the non-treated one. Computational analysis showed these compounds are non-toxic and possess good drug-likeness properties. These findings suggest that G. uralensis-extracted components might be useful therapeutic agents for the management of muscle-associated diseases. 相似文献
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鸡心、鸡血中抗氧化物的提取及其活性研究 总被引:2,自引:0,他引:2
从鸡心、鸡血中提取抗氧化物 ,并分别利用邻苯三酚 (PR)自氧化法、碘量法对其活性进行了检测。结果表明 :鸡心提取物比鸡血提取物的抗氧化活性强。 相似文献