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Study on ultrasound countercurrent extraction technology of Panax ginseng Selection of solvent system for high speed countercurrent chromatography in separation of natural products Process of three-effect dynamic countercurrent extraction from Hedyotis diffusa Extracting of alkaloids from Nelumbo nucifera leaves by multi-stage countercurrent extraction Advances in studies on multi-stage countercurrent extraction technology in traditional Chinese medicine Technological process of two-pot countercurrent extraction of hydroxysafflor yellow A Research on technological process of two-pot countercurrent extraction of hydroxysafflor yellow A Optimizing process of four-effect countercurrent extraction of danshensu from Salvia miltiorrhiza Separation and purification of coumarins from Heracleum millefolium by high-speed counter-current chromatography Research progress in new technologies for extraction and separation of Chinese materia medica Study on ultrasound countercurrent extraction technology of Panax ginseng Application of ultrasound counter currentextraction in patent of traditional Chinese medicine Isolation of flavonoids from Spatholobus suberectus by high speed countercurrent chromatography and study on their anti-tumor activities Isolation of flavonoids from Spatholobus suberectus by high speed countercurrent chromatography and study on their anti-tumor activities