I. Fundamentals.- Fifteen Years of Ultrafiltration: Problems and Future Promises of an Adolescent Technology.- Production, Specification, and Some Transport Characteristics of Cellulose Acetate Ultrafiltration Membranes for Aqueous Feed Solutions.- Chemical and Morphological Effects of Solute Diffusion Through Block Copolymer Membranes.- Practical Aspects in the Development of a Polymer Matrix for Ultrafiltration.- Permeability Parameters of a Novel Polyamide Membrane.- Formation of Poly(methyl methacrylate) Membranes Utilizing Stereocomplex Phenomenon.- Advances in Hollow Fiber Ultrafiltration Technology.- Transport Behavior of Asymmetric Polyamide Flat Sheet Membranes and Hollow-Fine Fibers in Dialysis-Osmosis and Hyperfiltration Experiments.- Separation of Macromolecules by Ultrafiltration: Influence of Protein Adsorption, Protein-Protein Interactions, and Concentration Polarization.- Ultrafiltration in an Unstirred Batch Cell.- II. Ultrafiltration Membrane Formation, Characterization and Concentration Polarization.- Morphology of Skinned Membranes: A Rationale from Phase Separation Phenomena.- Characterization Technique of Straight-Through Porous Membrane.- Flow Rates of Solutions Through Ultrafiltration Membranes Monitored by the Structure of Adsorbed Flexible Polymers.- Protein Ultrafiltration: Theory of Membrane Fouling and Its Treatment with Immobilized Proteases.- Boundary Layer Removal in Ultrafiltration.- Initial Time Stirred Protein Ultrafiltration Studies with Partially Permeable Membranes.- Electrophoretic Techniques for Controlling Concentration Polarization in Ultrafiltration.- Prediction of Permeate Fluxes in UF/RO Systems.- Demetallation of Chelating Polymers by Diafiltration in the Presence of a Permeable Complexing Agent.- III. Industrial Applications of Ultrafiltration.- Progress in the Industrial Realizations of Ultrafiltration Processes.- Recent Developments of Membrane Ultrafiltration in the Dairy Industry.- Ultrafiltration of Whole and Skim l“g