HPLC法测定6种石杉科植物中石杉碱甲的含量

目的 测定6种石杉科植物中石杉碱甲的含量。方法 用2％酒石酸溶液提取总碱，HPLC法测定，外标法定量。结果 石杉碱甲在所测定的5种石杉科植物蛇足石杉、皱边石杉、四川石杉、金丝条马尾杉、柳杉叶马尾杉中均有较高分布，分别达到0．0481％，0．0579％，0．0706％，0．0345％，0．1961％，在闽浙马尾杉中含量较少，仅为0．0061％。结论 方法简便、准确，可用于石杉碱甲资源的寻找。     

高效液相色谱法测定石杉碱甲滴眼液中石杉碱甲

目的建立石杉碱甲滴眼液的定量测定方法。方法采用反相高效液相色谱法,以十八烷基硅烷键合硅胶为固定相,磷酸盐缓冲液-乙腈(86∶14);检测波长310 nm;体积流量1.0 mL/min;进样量20μL。结果石杉碱甲在质量浓度为5.0～100.0μg/mL范围内呈良好的线性关系。回归方程为:A=37 902.366 60C+2 985.169 43,r=0.999 9。平均回收率为99.38%(RSD为0.38%,n=9)。结论本方法操作简便,准确,重现性好,可用于该制剂的质量控制。     

HPLC法同时测定17种石杉亚科植物石杉碱甲、乙

目的建立HPLC法同时测定17种(含2待发表新种)石杉亚科植物中石杉碱甲(huperzine A)和石杉碱乙(huperzine B)的含有量。方法石杉碱甲、乙酒石酸提取液的分析采用Wondasil C_(18)色谱柱(4.6 mm×250 mm,5μm);以甲醇-醋酸铵溶液为流动相,等度洗脱;体积流量1.0 mL/min;检测波长310 nm;柱温室温。外标法定量。结果石杉碱甲、乙分别在0.002 0~0.30μg、0.001 8~0.27μg范围内线性关系良好(r=0.999 9),平均加样回收率、RSD分别为103.86%(1.85%)、101.3%(1.30%)。17种石杉亚科植物中都含有石杉碱甲、乙,各物种之间含有量有显著性差异;喜马拉雅马尾杉中石杉碱甲含有量最高,达0.22%,柳杉叶马尾杉、有柄马尾杉和马尾杉含量也较高;马尾杉中石杉碱乙含有量最高。结论该方法准确稳定,重复性好,可用于石杉亚科植物中石杉碱甲和石杉碱乙的质量控制。     

加兰他敏和石杉碱甲生物合成的研究进展

植物来源的加兰他敏、石杉碱甲等乙酰胆碱酯酶抑制剂(AChEIs)以其高效低毒的优势成为当前临床治疗阿尔茨海默病的主流药物。由于目前加兰他敏、石杉碱甲等AChEIs尚未实现工业规模化合成,故仍主要依赖植物提取。然而,药源植物培育周期长、难度大,药效物质含量低,随着社会需求的急剧攀升,供求矛盾日益突出。开发新替代资源以及利用现代基因工程技术合成加兰他敏、石杉碱甲等AChEIs是缓解当前矛盾的有效途径。对近年来加兰他敏和石杉碱甲生物合成的相关研究进展进行综述,总结了替代资源的开发研究现状,以期为挖掘加兰他敏、石杉碱甲等AChEIs优势新资源及利用代谢工程合成药效物质研究提供参考。     

A primary survey of the resources of Chinese materia medica in the Ganzi District

This paper gives an account of the classification, distribution and resources of medicinal plants, traditional Zang folk medicine and historical changes of some rare crude drugs in Ganzi district. Rational suggestions have been made with regard to the preservation, development and utilization of the natural resources that are medicinally and economically important.     

热带石松科植物中石杉碱甲的含量差异(英文)

(-) Huperzine A is a bioactive alkaloid from Huperzia serrata (Lycopodiaceae) used for the treatment of Alzheimer’s disease. High yielding (-) huperzine A species is of interest for mass propagation since it grows slowly in temperate countries. The content of (-) huperzine A from temperate countries was reported but none reported from tropical species. The aim of this study was to evaluate the content of (-) huperzine A from tropical club mosses and further identify a high yielding species. Club mosses from Lycopodiaceae family were collected from Peninsular Malaysia. The collected club mosses were dried, pulverized and extracted with methanol. A gradient reverse phase HPLC-photodiode array detector method with increasing amount of methanol in 0.01 % trifluoroacetic acid was developed. The calibration curve was linear from 5 to 100 g·mL-1 with correlation coefficient, r2, of 0.998 1. The precision for both intra-and inter-day peak area were between 0.48% to 1.24 % and 0.95% to 3.85 %, respectively. The recovery of the method was between 99.8% to 103.8 %. Though geographically segregated, (-) huperzine A content in Huperzia phlegmaria and H.carinata found in the tropics was highest and similar to species in Australasia. Both species may provide a good source of (-) huperzine A.     

天然冰片资源研究进展

天然冰片是一味重要的中药,具有开窍醒神、退热止痛的功效,已广泛用于医药、香料及化工领域。目前天然冰片供不应求,市场开发前景广阔。该文通过查找近二十年参考文献总结了天然冰片的植物资源分布、培育现状、分子生物学研究进展,以期为天然冰片的研究和开发提供依据和思路。     

石杉碱甲水凝胶微针的制备及经皮传递研究

目的 研究石杉碱甲水凝胶微针的制备条件,并考察微针的性能及其经皮给药的可行性.方法 采用聚乙烯醇和葡聚糖混合水凝胶作为微针的基质材料,考察材料的溶胀性能和拉伸性能,确定最优处方;以两步夹心法将石杉碱甲药粉载入微针基质材料中,采取离心及冷冻-解冻工艺制备针形为圆锥体,针长为500 μm,针间距为1000μm的水凝胶微针阵...     

高效液相色谱-荧光检测法测定大鼠脑脊液中的石杉碱甲

 目的建立大鼠脑脊液中石杉碱甲的高效液相色谱-荧光测定方法。方法采用ODS-C₁₈柱(4.6mm×250mm,10μm),以甲醇-水-三乙醇胺(60:40:0.1)为流动相,流速1mL·min^-1,荧光检测器于激发波长310nm,发射波长370nm处检测,同时紫外检测器于波长310nm处检测作为对照。结果石杉碱甲质量浓度在0.5～200μg·L^-1内线性关系良好(r=0.9999),最低定量限为0.5μg·L^-1,比紫外法降低了10倍。结论该方法准确,可靠,比高效液相-紫外法灵敏度更高。     

不同产地皱边石杉中石杉碱甲的含量研究

目的 :采用HPLC测定湖南不同产地皱边石杉中的石杉碱甲含量。方法 :采用NovapakC18柱 ( 5 μm ,15 0mm×4 .6mm) ,流动相 :甲醇∶水 ( 4 0∶6 0 ) ,流速 :1mL·min-1,检测波长 :315nm。结果 :石杉碱甲在 4 .2～ 2 1μg·mL-1范围内与峰面积呈良好的线性关系 ,桑植产皱边石杉中石杉碱甲含量最高。结论 :皱边石杉中石杉碱甲的含量随着外界环境的改变而改变 ,所建立的HPLC方法快捷、灵敏、准确。     

蛇足石杉中石杉碱甲含量的动态变化分析

目的:为揭示蛇足石杉Huperzia serrata居群间和居群内石杉碱甲(HupA)含量的变异程度和变异规律,以及引种前后的变化情况。方法:以采自浙江、广西和重庆的3个蛇足石杉居群,共73株活体植物为研究对象,用改进的HPLC测定了每株引种前后的HupA含量,采用变异系数、单因素方差分析和配对t检验等统计方法,分析了居群间和居群内HupA含量的多样性特征,以及引种前后的含量变化规律。结果:蛇足石杉中石杉碱甲含量在居群间和居群内存在极其丰富的多样性,居群间的含量差异达显著或极显著水平,居群内含量的变异系数从东到西分别为0.36,0.43,0.40;同园引种1年后,东部的浙江居群与西部的广西和重庆居群间的含量差异仍保持极显著的水平,而西部的广西和重庆居群间含量的显著性差异则消失,同时,各居群个体的石杉碱甲含量在引种前后均未发生明显的变化。结论:蛇足石杉中石杉碱甲含量的高低是遗传因素与环境条件共同作用的结果,但更受遗传因素控制。     

Ethnobotanical survey in the Palestinian area: a classification of the healing potential of medicinal plants

An ethnobotanical survey was carried out in the West Bank to evaluate the relative efficacy of the plants used to treat skin diseases and prostate cancer. A total number of 102 informants, 30 years and older and either native born or had been living in the West Bank for more than 30 years, were interviewed using a previously prepared questionnaire. Of about 165 plant species mentioned by the informants, 63 (38.1%) were mentioned by three or more informants. On the basis of their primary uses, 21 of these plants were reported to relieve skin disorders, 17 for urinary system disorders, 16 for gastric disorders, nine for cancer and prostate disorders, eight for arthritis, five for respiratory problems, and five for other ailments. Indices on fidelity levels (FLs), relative popularity level (RPL), and rank-order priority (ROP) were calculated. Plants were classified in two groups: 'popular' (RPL=1) or 'unpopular' (RPL<1). The following plant species were classified as popular in this study: Teucrium polium, Matricaria aurea, Urtica pilulifera, Paronychia argentea, Petroselinum sativum, and Salvia fruticosa. The remaining 57 species were classified as 'unpopular'. Fifty-nine plants were claimed to be effective against cancer and prostate disorders, which include Arum dioscorides, U. pilulifera, Allium sativum, Viscum cruciatum, and Allium cepa.     

A review of natural products and plants as potential antidiabetic drugs

The present paper reviews the active, natural principles and crude extracts of plants which have been experimentally studied for hypoglycemic activity in the last ten years. Phytoconstituents with known structures have been classified in appropriate chemical groups and the active crude extracts have been listed alphabetically according to genus. Data are reported on their pharmacological activity, mechanism of action, toxicity and other properties.     

3S技术在药用植物资源调查研究中的应用

3S技术在药用植物适宜性评价中应用较多,但在资源调查和储量估算方面研究较少,只集中在大面积栽培品种或野生广布种如人参、甘草、红花等少数几种药用植物,特别是在野生稀有药用植物资源调查方面的应用尚属空白。简述了中药资源普查的现状及近几年3S技术在栽培品种、野生广布种、野生稀有种、特殊生态环境药用植物资源调查及储量估算研究中的应用,并对高光谱遥感在中药资源调查及储量估算进行案例介绍。随着我国高分辨卫星的发射以及高光谱遥感技术的发展,使得利用3S技术对野生稀有种药用植物资源调查成为可能。     

中药资源调查方法研究

中药资源可持续利用及生物多样性保护已成为当前中药领域的研究热点,选择合适的资源调查方法是其要解决的关键问题之一.作者提出在改进传统中药资源调查方法的基础上,引进现代技术,形成适应时代发展的科学调查方法,推动中药资源可持续利用及生物多样性保护.     

中药资源调查方法研究

中药资源可持续利用及生物多样性保护已成为当前中药领域的研究热点,选择合适的资源调查方法是其要解决的关键问题之一。作者提出在改进传统中药资源调查方法的基础上,引进现代技术,形成适应时代发展的科学调查方法,推动中药资源可持续利用及生物多样性保护。     

“药王”金线莲的自然资源初步研究

目的：科学地保护和合理地开发利用珍贵药用植物金线莲Ａnoectochilus roxburghii(Wall.)Lindl.的自然资源。方法采用查阅文献资料,民间访查和实地考察的方法进行研究。结果研究报道其生物学特性、生态环境特点、生长发育习性和自然分布规律。并对这一资源的状况提出了保护与开发利用的措施,结论为科学地保护和合理开发利用该自然资源提供依据。     

中药资源保护的类型和模式分析

为中药资源的可持续性利用探索一套科学而系统的保护研究策略。总结、分析长期在中药资源的保护和可持续性利用方面的研究工作。提出了中药资源需要保护的5种类型，并针对每1种类型提出了相应的保护研究模式。     

湖南省石杉属植物中石杉碱甲含量的研究

 目的测定湖南产6种(含一新种)石杉属植物中石杉碱甲含量,为科学利用该植物提供可靠依据。方法于该省野外实地采集石杉属植物,以2%酒石酸溶液提取总碱,用改进的高效液相色谱法测定石杉碱甲的含量(外标法)。结果所采集6种石杉属植物中,石杉碱甲在蛇足石杉、狭叶石杉、长柄石杉、四川石杉、湖南石杉(拟新种)中均有分布,长柄石杉中含量最高,达0.0789%;本实验证明皱边石杉中不含石杉碱甲,先前两篇高含量报道应为鉴定之误。结论本测定方法简便、准确;在该属中4种形态极难区分的种之间,石杉碱甲含量具有分类学意义。