Contents: Y.-H. Truei, G. Gu, G.-J. Tsai, G.T. Tsao, West Lafayette, USA: Large-Scale Gradient Elution Chromatography.- C.A. Heath, Hanover, USA; G. Belfort, Troy, USA: Synthetic Membranes in Biotechnology: Realities and Possibilities.- A.D. Diamond, J.T. Hsu, Bethlehem, USA: Aqueous Two-Phase Systems for Biomolecule Separation.- J.H.T. Loung, A.L. Nguyen, Montreal, Canada: Novel Separations Based on Affinity Interactions.- M.O. Niederauer, C.E. Glatz, Ames, USA: Selective Precipitation.
