Aim To investigate the plant origin and the identity of the red substance on the surface of Hong Dangshen, a unique medicinal material for diarrhea in Hong Kong. Methods The HPLC fingerprints and 5S rRNA gene spacer s...Aim To investigate the plant origin and the identity of the red substance on the surface of Hong Dangshen, a unique medicinal material for diarrhea in Hong Kong. Methods The HPLC fingerprints and 5S rRNA gene spacer sequences of Hong Dangshen were obtained and compared with those of genuine species of Radix Codonopsis. The X-ray diffraction spectrum of the red substance was analyzed and compared with that of Halloysitum fingerprints to the Codonopsis species and the highest similarity to Rubrum. Results Hong Dangshen showed very similar HPLC Codonopsis pilosula var. modesta in terms of 5S rRNA gene spacer sequences. The X-ray diffraction spectrum of the red substance was consistent with that of Halloysitum Rubrum. Conclusion The source plant of Hong Dangshen was suggested to be Codonopsis pilosula var. modesta, one of the genuine original plants of Radix Codonopsis (Dangshen) in the China Pharmacopoeia (2005 edition). The red substance on the surface of Hong Dangshen was indicated to be Halloysitum Rubrum, a traditional medicinal mineral for chronic diarrhea. Our data suggest that Hong Dangshen is derived from the roots of Codonopsis pilosula var. modesta which has been processed with Halloysitum Rubrum, and the name is suggested to be Radix Codonopsis Praeparata Halloysita Rubra.展开更多
目的:通过比较灶心土、赤石脂和禹余粮的热解特性及红外光谱相似度来探讨赤石脂、禹余粮替代灶心土的可行性。方法:热解特性研究采用热重差热综合热分析仪,取试样量(30±5)mg置于坩锅中,以10℃·min^(-1)的升温速率、流量60 m L...目的:通过比较灶心土、赤石脂和禹余粮的热解特性及红外光谱相似度来探讨赤石脂、禹余粮替代灶心土的可行性。方法:热解特性研究采用热重差热综合热分析仪,取试样量(30±5)mg置于坩锅中,以10℃·min^(-1)的升温速率、流量60 m L·min^(-1)的恒定流速通入模拟空气[N_2-O_2(4∶1)],从室温升至900℃。红外光谱试验采用溴化钾压片法,光谱分辨率4 cm^(-1),测量范围4 000~500 cm-1,扫描信号累加32次,所得数据经Omnic软件进行自动基线校正、平滑及纵坐标归一化。数据处理及图表绘制采用Origin 8.0软件和Omnic软件完成。结果:比较热解特性发现灶心土、赤石脂、禹余粮的热解特性均在400~600℃处出现一段失重台阶;但整体而言,赤石脂与禹余粮热解特性没有体现出灶心土热解特性的复杂性;通过红外光谱相似度数值得出,以灶心土作为对照,赤石脂与灶心土相似度数值较偏低,禹余粮与与灶心土相似度数值处于中等水平。结论:就热解特性及红外光谱相似度而言,禹余粮与灶心土相似性较好,可能较赤石脂更适用作灶心土的替代品,为相关中药炮制辅料的研究提供参考。展开更多
基金Hong Kong Jockey Club Charities Trust (ProjectNo. HKJCICM-2-02R).
文摘Aim To investigate the plant origin and the identity of the red substance on the surface of Hong Dangshen, a unique medicinal material for diarrhea in Hong Kong. Methods The HPLC fingerprints and 5S rRNA gene spacer sequences of Hong Dangshen were obtained and compared with those of genuine species of Radix Codonopsis. The X-ray diffraction spectrum of the red substance was analyzed and compared with that of Halloysitum fingerprints to the Codonopsis species and the highest similarity to Rubrum. Results Hong Dangshen showed very similar HPLC Codonopsis pilosula var. modesta in terms of 5S rRNA gene spacer sequences. The X-ray diffraction spectrum of the red substance was consistent with that of Halloysitum Rubrum. Conclusion The source plant of Hong Dangshen was suggested to be Codonopsis pilosula var. modesta, one of the genuine original plants of Radix Codonopsis (Dangshen) in the China Pharmacopoeia (2005 edition). The red substance on the surface of Hong Dangshen was indicated to be Halloysitum Rubrum, a traditional medicinal mineral for chronic diarrhea. Our data suggest that Hong Dangshen is derived from the roots of Codonopsis pilosula var. modesta which has been processed with Halloysitum Rubrum, and the name is suggested to be Radix Codonopsis Praeparata Halloysita Rubra.