黑三七中总皂苷的含量测定

目的建立黑三七中总皂苷的含量测定方法。方法采用紫外分光光度法在544nm波长处测定黑三七中总皂苷的含量。结果10批黑三七中总皂苷的含量为3.24%~6.37%;方法学研究结果表明,本方法总皂苷质量在10.62~106.20μg范围内,线性关系良好,具有较好的精密度、重复性和准确度。结论总皂苷作为黑三七中的主要活性成分,含量较高,是黑三七质量评定的重要依据。本文建立的含量测定方法简便易行、专属性强、准确可靠,为黑三七的质量要求提供了重要的依据。

HPLC法检测黑三七中20种单体皂苷含量

目的建立一种HPLC法测定黑三七中20种单体皂苷,即三七皂苷R1、R2(R),人参皂苷Rg1、Re、Rh1(S)、Rh1(R)、Rg2(S)、Rg2(R)、Rg5、Rh2(S)、Rh2(R)、PPD、Rb1、Rd、RK3、PPT、Rg3(S)、Rg3(R)、RK1、RK2。方法使用Thermo BDS Hypersil C(250mm×4.6mm,5μm)柱通过HPLC系统进行分析,乙腈-水梯度洗脱,检测条件为:波长203nm、流速1.0mI/min、柱温40℃。结果黑三七单体皂苷含量为0.006~15.150mg/g,干三七经加工炮制,随蒸制时间的变化,黑三七中单体皂苷含量也在变化,其中Rg3(R)、Rg3(S)、Rg5、RK3、RK1含量增加最明显,分别增加了112倍、23倍、10倍、9倍、8倍。结论干三七经加工炮制得黑三七,三七中主要单体皂苷通过水解转化为稀有皂苷,提高了药理活性,提升了药用价值和产品附加值,具有很好的开发前景。

Studies on the Isolation, Identification and In Vitro Growth Rates of the Three Pathogenic Fungi from Panax notoginseng Cultivated in Wenshan Eparchy

Objective] The aim of this study was to simultaneously isolate and identify the main pathogenic fungi of the root rot, black spot and round spot from the Panax notoginseng plants cultivated in Wenshan Eparchy of Yunnan Province of China. [Method] The pathogenic fungi were isolated and purified by using potato dextrose agar （PDA） medium. The morphological identification was accomplished first according to the colony forms of the fungi when cultivated in vitro, then accord-ing to the symptom characteristics and colony forms of the re-isolated fungi in the reverse inoculation experiments. The molecular identification was performed accord-ing to the amplification and alignment of the internal transcribed space （ITS） se-quences of the fungi. The increases of the diameters and thickness of the colonies of the fungi cultivated in vitro were employed to indicate the growth rates of the fungi. [Results] The consistency of the colony forms and symptom characteristics and the 96%-99% similarities revealed in the ITS sequence alignments al proved that the main pathogenic fungi of the root rot, black spot and round spot of the P. notoginseng plants raised in Wenshan were Cylindrocarpon didymium, Alternaria panax and Mycocentrospora acerina, respectively. When cultivated in vitro in the same temperature, humidity and il umination, the increases of the colony diameters and thickness of C. didymium were the highest, fol owed by those of A. panax, then those of M. acerina. During different cultivation periods, the differences of the colony diameters and thickness of the three fungi al reached extremely significant level. However, at the same cultivation time, the differences of the diameters and thickness among the three fungi only reached significant level. [Conclusion] The main pathogenic fungi which result in the root rot, black spot and round spot of the P. notoginseng in Wenshan are C. didymium, A. panax and M. acerina, respec-tively. When these three diseases break out at the same time, the root rot wil spread fastest, fol owed orderly by the black spot and the round spot.