Overview of Countercurrent Chromatography; Liquid Polarity and Stationary-Phase Retention in Countercurrent Chromatography; Orbital Turns per Theoretical Plate for Countercurrent Chromatography Device Comparison; Cross-Axis Coil Planet Centrifuge: Use of Experimental Design to Determine Optimal Settings; Model Based on Stokes' Law as a Simple Way to Describe the Flow Pattern of the Mobile Phase in Centrifugal Partition Chromatography; Optimization of Countercurrent Chromatography Solvent Systems; Separation of Three Alkaloids from Senecio fuberi Hemsl by High-Speed Countercurrent Chromatography; Separation of Gardenia Yellow Components by High-Speed Countercurrent Chromatography; Separation of Cucurbitacin B and Cucurbitacin E from Fruit Base of Cucumis melo L. by High-Speed Countercurrent Chromatography; Purification of the Human Immunodeficiency Virus-1 Aspartyl Proteinase Substrate Peptide; Countercurrent Chromatographic Isolation of High- and Low-Density Lipoprotein Fractions from Human Serum; On-Line Fast Atom Bombardment Mass Spectrometric Detection in High-Speed Countercurrent Chromatography Through a Moving Belt Interface; Measurement of Partition Coefficient Using Centrifugal Partition Chromatography: Method Development and Application to the Determination of Solute Properties; pH-Zone-Refining Countercurrent Chromatography: A New Technique for Preparative Separation; Equilibrium Model for pH-Zone-Refining Countercurrent Chromatography; Preparative Separation of Components of Commercial 4,5,6,7-Tetrachlorofluorescein by pH-Zone-Refining Countercurrent Chromatography; Purification of 4,5,6,7-Tetrachlorofluorescein by pH-Zone-Refining Countercurrent Chromatography: Effects of Sample Size, Concentration of Eluent Base, and Choice of Retainer Acid