尖叶假龙胆化学成分研究

目的：研究尖叶假龙胆（Gentianella acuta）化学成分。方法：利用各种色谱技术对尖叶假龙胆进行分离纯化,所分离得到的化合物根据理化性质和光谱数据进行结构鉴定。结果：尖叶假龙胆化学成分分别为β-谷甾醇（β-Sitosterol）,胡萝卜苷（Daucosterol）与8-O-β-D-吡喃葡萄糖基-1,3,5-三羟基（口山）酮（Norswertianolin）。结论：以上3个化合物均为首次从该植物中分离得到     

中国假鹰爪属植物资源调查与原植物鉴定△

通过文献考查、原植物实地考察和标本采集 ,以及国内各大植物标本馆馆藏标本查阅 ,基本弄清了我国假鹰爪属植物种类及分布情况。为开发利用该属植物资源、正确进行该属植物种级水平分类鉴定提供科学依据     

首届国际传统药物学学术大会介绍

本文介绍了1990年在法国召开的国际传统药物学学术大会的一些情况,并对传统药物学今后的发展提出一些看法及建议。     

尖叶假龙胆中的雏菊叶龙胆酮提取分离

目的:建立尖叶假龙胆中雏菊叶龙胆酮提取分离方法。方法:用95%乙醇对尖叶假龙胆进行提取,浓缩后再以硅胶为载体进行柱色谱分离。结果:从尖叶假龙胆中分离得到大量雏菊叶龙胆酮。结论:该方法简单、实用、高效。     

假鹰爪属植物化学成分和药理活性

假鹰爪属的假鹰爪、毛叶假鹰爪、大叶假鹰爪和云南假鹰爪等植物中含黄酮类、生物碱类、挥发油、有机酸、三萜和植物甾醇等化学成分,并具有抗肿瘤、抗病毒、强心、抑菌等药理活性。总结了近30年来对该属植物的研究概况,为进一步研究提供参考。     

第三届国际传统药物学大会概况

本文报道第三届国际传统药物学大会的概况,重点介绍大会的全体学术报告以及有关国际传统药物学会活动的最新动态。     

青海锦鸡儿属植物资源的调查与研究

对青海省豆科锦鸡儿属植物进行了地理分布调查和分类研究,并对鬼箭锦鸡儿、短叶锦鸡儿、印度锦鸡儿、小叶锦鸡儿等植物的化学成份和药理作用进行了讨论,从而为青海锦鸡儿属植物的进一步合理保护和开发应用提供可靠的参考依据.     

中国药用菊属植物种质资源

中图法分类号Ｒ２８２．７１菊属Ｄｅｎｄｒａｎｔｈｅｍａ植物共有３０余种,主要分布在东亚,我国产１９种。据近年实地调查,药用的共有１１种,３变种及９栽培变种,现整理报道于下。１种质资源１．１菊花Ｄ．ｍｏｒｉｆｏｌｉｕｍ（Ｒａｍａｔ．）Ｔｚｖｅｌ．原产我...     

The Genus Gentianella Moench: A Phytochemical and Ethno- pharmacological Review

The plants in genus Gentianella Moench (Gentianaceae) which comprised approximately 250 species, are mainly distributed in temperate regions of the world. Many Gentianella plants are intensely bitter and employed in traditional medicine to stimulate appetite, treat disorders of the gallbladder, and treat fever like the other bitter gentians in various regions of the world. Some species exhibit other remarkable therapeutic effects in the treatments of obesity, diabetes, and heart diseases. Eleven iridoids, twenty-eight xanthones, three C-glucoflavonoids, and eight other compounds have been isolated from the genus. Most of these compounds are associated with antimicrobial, anti-inflammatory, anti-oxidant, hypoglycemic, and antitumor activities, which provide an empirical base for the traditional utilization of the plants in genus Gentinella Moench.     

思茅地区石斛属植物资源的调查

概述了自八十年代以来对思茅地区野生石斛属植物的种类及分布所作的调查 ,提供了 4 1种区内石斛的种名和分布点。为石斛种质资源的研究、药用石斛的可持续开发和利用 ,以及石斛的人工栽培提供了科学依据。     

唐山地区药用植物资源及其可持续开发利用研究

目的:调查唐山地区药用植物资源的种类与分布,为药用植物资源的开发利用提供依据。方法:深入各代表性地域进行药用植物资源调查,采集标本,鉴定标本,考证文献资料,调查在民间的应用等。结果:唐山地区有药用植物113科、301属、382种,其中蕨类植物7科8属11种;裸子植物5科6属8种;单子叶植物9科36属42种。双子叶植物92科251属321种。结论:唐山地区药用植物资源丰富,具有较好的开发利用前景。     

云南省药用种子植物的药用功效和药用部位统计分析

目的：对云南省药用种子植物的资源状况进行深入了解,并为保护和合理利用提供基础资料。方法：根据相关文献资料并结合野外调查,建立云南野生药用种子植物资源数据库。结果：该数据库共收集药用种子植物220个科,1416属,4203种。其中草本2209种、灌木801种、乔木716种、藤本379种,并从药用功效和药用部位进行了统计分析。结论：经统计分析发现,云南药用种子植物资源丰富,药用种类在各科中的分布是不均衡的,即与全国的分布特点相似,又具有自身特点;药用功效类型多样,范围广泛,较多地受到少数民族用药传统的影响;从药用部位上看,以传统利用方式为主,破坏了药用植物资源的生物多样性。     

牯牛降国家自然保护区珍稀濒危药用植物资源调查

目的 调查牯牛降国家自然保护区的珍稀濒危药用植物资源,对资源的保护及永续利用进行探讨。方法 通过查阅文献、走访调查、野外实地调查、标本采集与鉴定,对保护区的珍稀濒危药用植物特色进行整理分析。结果 牯牛降有珍稀濒危药用植物30科58种,其中国家级保护植物18种,其他珍稀药用植物40种。在58种珍稀濒危药用植物中,28种是常用中药材的正品来源,12种是中国特有的第四纪以前孑遗植物。结论 牯牛降国家自然保护区珍稀濒危药用植物种类丰富,需合理利用,并加强环境和资源保护。     

安徽省防己科药用植物资源

目的:掌握安徽省防己科药用植物资源状况。方法:野外调查,标本鉴定和文献资料查阅。结果:安徽省防己科药用植物资源共有5属7种1变种,其中粉防己资源紧缺,人工半野生抚育是延续粉防己资源利用的有效途径。结论:为进一步合理利用防己科资源奠定基础。     

Identification of sitosteryl glucoside palmitate in a chloroform-derived fraction of Phyllanthus niruri with antiplasmodial and peripheral antinociceptive properties

ObjectiveTo evaluate the antiplasmodial properties of fractions of chloroform portion of Phyllanthus niruri (P. niruri) methanol extract and identify a suitable chemical marker present therein.MethodsChloroform portion of P. niruri methanol extract was separated from silica gel using gradient systems of hexane, ethylacetate and methanol. The fractions were screened for antiplasmodial activity against Plasmodium falciparum HB3 and FcM29. Fractions with IC₅₀<10 μg/mL against parasites were further screened for peripheral analgesic activity, while cytotoxicity was evaluated using THP-1 cells.ResultsFractions 12-14 were very active (IC₅₀<10 μg/mL) against Plasmodium falciparum and showed no significant cytotoxicity. Fractions 12 and 13 exhibited significant (P<0.01) reduction in acetic acid-induced writhing in mice, decreasing the number of writhes by 66.67% and 65.22% respectively and comparable with 100 mg/kg aspirin (65.22%). From fraction 12, a compound was isolated and identified as sitosteryl-6-β-D-glucoside-6’-palmitate by ¹H, ¹³C nuclear magnetic resonance and mass spectroscopies.ConclusionsOur findings illustrate antiplasmodial column fractions of P. niruri with analgesic activity and identify sitosteryl glucoside palmitate as a chemical marker of activity.     

安徽和县常用药用植物资源调查

目的调查和县药用植物的资源种类与分布特点。方法通过实地调查、标本采集与鉴定,整理与分析调查结果。结果和县分布的药用植物606种,隶属133科,400属,其中常用药用植物152种,主要分布在西北丘陵低山区。结论和县常用中药资源丰富,应可持续利用野生中药资源和合理发展中药种植,调整农业产业结构,促进中药产业的发展。     

Screening of Antioxidant Potential of Selected Barks of Indian Medicinal Plants by Multiple in vitro Assays LI

Objective To evaluate the antioxidant potential in herbal extract barks of five therapeutically important medicinal plants native to India,i.e.Crataeva nurvala Buch.-Ham.,Buchanania lanzan Spreng.,Aegle marmelos Corr.,Dalbergia sissoo Roxb.ex DC.,and Cedrela toona Roxb.Methods Standardized aqueous alcoholic extracts from the selected barks having different target radicals,such as superoxide radical,nitric oxide,ABTS radical,and peroxidative decomposition of phosphohpids.were prepared and screened bv multiple in vitro assays.These extracts were also tested for total phenolic and tannin content and correlated with antioxidant capacity. Results Tbtal phenolic and tannin contents were found to be the highest in C. nurvala (195 GAE mg/g and 218.3 mg/g CE).SOD mimetic activity was found to be the highest in Crataeva nurvula,although all barks showed activity more than 100 units/mg extract.Lipid peroxidation inhibitory potential was found to be the highest in Crataeva nurvala(83.4% inhibition of MDA formation/10 μg extract),and also showed a comparatively high NO quenching capacity (45.5% per 10 μg extract).The highest NO quenching potential was found in Aegle marmelos(47.3% per 10 μg extract).Cedrela toona showed the lowest LPO inhibitory potential and NO quenching capacity(50.5% and 30.5%,respectively).Buchanania lanzan,a medicinal plant extensively used for inflammatory disorders and Dalbergia sissoo also showed 72.5% and 69.1% LPO inhibitory potential/10 μg extract.Trolox equivalent antioxidant capacity ranged from 0.24 to 0.39 mmol/L TEAC/mg extract,indicating that all the barks tested had ABTS radical quenching capacity.Conclusion Bark of Crataeva nurvulahas the highest antioxidant capacity and a positive correlation between antioxidant activity and their plendic content was found.