葛根中有效部位及有效成分的高效液相色谱分析

目的建立全面控制葛根及其制剂的定性和定量分析方法。方法用反相高效液相色谱法(RPHPLC),以甲醇水(42∶58)为流动相在250nm波长下检测,对葛根有效部位(醋酸乙酯提取部位)进行指纹图谱定性分析,对葛根有效部位中的有效成分葛根素和大豆苷元进行定量测定,并对11种不同来源的葛根药材进行分析测定。结果在定性分析条件下,葛根有效部位的HPLC指纹图谱中有5个共有峰,可以作为其定性鉴别的指标峰;在以葛根素和大豆苷元为定量指标分析中,其方法的回收率分别为98.0%和95.4%,相对标准偏差(RSD)分别为1.30%和1.61%,葛根药材中葛根素和大豆苷元的含量分别在0.213%～3.626%和0.012%～0.049%范围内。结论以葛根有效部位指纹图谱定性分析和有效成分定量分析方法,可以准确有效地控制其质量。     

Response surface optimization of microwave-assisted extraction for HPLC-fluorescence determination of puerarin and daidz

Microwave-assisted extraction was optimized with response surface methodology for HPLC-fluorescence determination of puerarin and daidzein in Radix Puerariae thomsonii.The optimized extraction procedure was achieved by soaking the sample with 70% methanol     

INHIBITORY EFFECTS OF THE ALKALOIDS FROM Radix Caulophylli ON THE PROLIFERATION OF HUMAN VASCULAR ENDOTHELIAL CELL

Angiogenesisplaysaveryimportantrolein tumorgrowthandmetastasis[1,2].Tumorssignalthe needforabloodsupplybysecretinggrowthfactors thattriggerangiogenesis,includingbasicfibroblast growthfactor(bFGF),vascularendothelialgrowth factor(VEGF)andplatelet deriveden…     

CO_2超临界流体萃取丹参中的有效成分

目的　建立CO2 超临界流体萃取丹参中有效成分的方法 ,并用高效液相 质谱法进行产物分析。方法　以 95 0mL·L-1乙醇为夹带剂 ,在 2 0MPa、4 5℃条件下 ,萃取丹参药材 1h后 ,再在 30MPa、6 5℃条件下 ,以 10 0mL·L-1的乙醇为夹带剂萃取 2h ,并将超临界萃取法与回流提取法、超声提取法进行了比较。结果　超临界萃取法萃取的成分最多 ,萃取效率也高于其他两种方法。结论　超临界萃取法提取丹参中有效成分耗时少、准确、效率高且提取完全。     

黄芪对蟾蜍离体单一肌梭传入放电的影响

目的　探讨黄芪、丹参对肌梭传入放电的影响。方法　用空气隔绝法记录蟾蜍离体单一肌梭的传入放电 ,观察黄芪和丹参注射液对肌梭传入电活动的影响 ,并与琥珀胆碱 (SCh)的作用进行比较。结果　应用 5 0mg·L-1SCh后 ,肌梭的自发放电频率由 (0 .79± 0 .12 )Hz增加至 (12 .2 6± 2 .38)Hz。应用 10 0、2 0 0、30 0mg·L-1黄芪后 ,肌梭的传入放电分别由 (0 .80± 0 .34)Hz、(0 .77± 0 .2 9)Hz、(0 .70± 0 .4 2 )Hz增加至 (13.18± 2 .4 3)Hz、(2 4 .0 3± 4 .0 7)Hz、(36 .17± 5 .83)Hz。丹参注射液对肌梭的传入放电没有作用。结论　黄芪可以使肌梭的传入放电频率显著增加 ,且呈剂量依赖现象     

Evaluation preparation technology of Xiaochaihu granules using fingerprint-peak pattern matching

An approach was proposed to evaluate preparation technology by means of fingerprint-peak matching technology of high performance liquid chromatography with diode array detector （HPLC-DAD）. Similarity and hierarchical clustering analysis （HCA） were applied     

Comparative analysis of essential oils found in Rhizomes Curcumae and Radix Curcumae by gas chromatography-mass spectrometry

A comparison of the volatile compounds in Rhizomes Curcumae （Ezhu） and Radix Curcumae （Yujin） was undertaken using gas chromatography mass spectrometi-y （GC-MS）. Ultrasonic extraction and GC-MS methods were developed for the simultaneous determination of five sesquiterpenes, namely, α-pinene, β-elemene, curcumol, germacrone and curdione, in Ezhu and Yunjin. Good linearity （r〉0.999） and high inter-day precision were observed over the investigated concentration ranges. The validated method was successfully used for the simultaneous determination of five sesquiterpenes in Ezhu and Yujin. The quantitative method can be effectively used to evaluate and monitor the quality of Chinese curcuma in clinical use.