Results 251 to 260 of about 19,880 (279)

Separation of apple procyanidins into different degrees of polymerization by high-speed counter-current chromatography

Journal of Chromatography A, 2001
Apple procyanidins were fractionated by high-speed counter-current chromatography in a one-step operation from apple condensed tannins using a type-J multilayer coil planet centrifuge. The separation of procyanidins was performed with a two-phase solvent system composed of methyl acetate-water (1:1) by eluting the upper phase at a flow-rate of 1.0 ml ...
Y, Shibusaw, A, Yanagida, M, Isozaki, H, Shindo, Y, Ito   +4 more
openaire   +2 more sources

Separation and purification of isoflavones from Pueraria lobata by high-speed counter-current chromatography

Journal of Chromatography A, 1999
High-speed counter-current chromatography (HSCCC) was applied to the semipreparative separation and purification of puerarin and related isoflavones from a crude extract of Pueraria lobata. Analytical HSCCC was used for the preliminary selection of a suitable solvent system composed of ethyl acetate-n-butanol-water (2:1:3, v/v/v).
X, Cao, Y, Tian, T, Zhang, X, Li, Y, Ito
openaire   +2 more sources

[Separation of alkaloids in tea by high-speed counter-current chromatography].

Se pu = Chinese journal of chromatography, 2001
Alkaloids extracted from the green tea were separated by high-speed counter-current chromatography. A series of experiments have been performed to investigate effects of different solvent system. A system of CHCl3-CH3OH-NaH2PO4(23 mmol/L) = (4:3:2) was selected, in which the upper phase was used as the stationary phase, and the lower phase as mobile ...
L, Yuan, R, Fu, T, Zhang, J, Deng, X, Li
openaire   +1 more source

Isolation and purification of inflacoumarin A and licochalcone A from licorice by high-speed counter-current chromatography

Journal of Chromatography A, 2004
High-speed counter-current chromatography (HSCCC) technique in semi-preparative scale has been applied to isolate and purify bioactive flavone compounds from the ethanol extract of Glycyrrhiza inflata Bat., a particular plant species of licorice. HSCCC separation was performed with a two-phase solvent system composed of n-hexane-chloroform-methanol ...
Wang, QE, Lee, FSC, Wang, XR
openaire   +3 more sources

Scaling High-Speed Counter-Current Chromatography for Preparative Neodymium Purification: Insights and Challenges

Journal of Chromatography A
Efficient rare earth element (REE) separations are becoming increasingly important to technologies ranging from renewable energy and high-performance magnets to applied radioisotope separations. These separations are made challenging by the extremely similar chemical and physical characteristics of the individual elements, which almost always occupy ...
Alexander B. Weberg, Mateusz Dembowski, Quintin K. Blad, George S. Goff, Susan K. Hanson, Iain May   +5 more
openaire   +2 more sources

Analytical high-speed counter-current chromatography with a coil planet centrifuge

Journal of Chromatography A, 1987
Y, Ito, Y W, Lee
openaire   +2 more sources

Golden rules and pitfalls in selecting optimum conditions for high-speed counter-current chromatography

Journal of Chromatography A, 2005
Yoichirô Itô
exaly  

Application of analytical and preparative high-speed counter-current chromatography for separation of alkaloids from Coptis chinensis Franch

Journal of Chromatography A, 1998
Tianyou Zhang, Yoichirô Itô
exaly  

Comparison of high-speed counter-current chromatography instruments for the separation of the extracts of the seeds of Oroxylum indicum

Journal of Chromatography A, 2005
D E Games, I A Sutherland, I A Sutherland   +2 more
exaly  

Purification of six lignans from the stems of Schisandra chinensis by using high-speed counter-current chromatography combined with preparative high-performance liquid chromatography

Food Chemistry, 2015
Lijie Zhu, Bin Li, Xianjun Meng
exaly