Separation and purification of tanshinone from Salvia miltiorrhiza by combination of silica gel and high-speed counter-current chromatography Application of high-speed counter-current chromatography in separation and purification for alkaloids in natural products Application of high-speed counter-current chromatography in separation and purification for alkaloids in natural products MICROWAVE EXTRACTION AND HSCCC ISOLATION AND IDENTIFICATION OF CHLOROGENIC ACID IN Eucommia ulmoides LEAVES Isolation and purification of gelsenicine and gelsevirine from Gelsemium elegans by high-speed counter-current chromatography Separation and purification of tanshinone from Salvia miltiorrhiza by combination of silica gel and high-speed counter-current chromatography