The papersin this volume are as a resultofcontributions given at the NATO Advanced Study Institute heldat L1andinam Building, University CollegeofWales, Aberystwyth, 10 - 23 September 1989. The Institute considered the physical and chemical propertiesof a variety ofcolloidal systems ranging from simple micellar solutions to concentrated colloidal dispersions. The purpose ofthe NATO Advanced Study Institute was to create a forum so that research scientists working in different areas concerned with colloid science could interact. The emphasL oft1"l. ;: contributions were on the interpretation ofthe different experimental and theoretical approach to give information on the structure, dynamics and equilibrium propertiesofthese systems. The application ofseveral different techniques in colloid science have been described; new developments and perspectives have been covered by several authors. The present volume reviews the current stale ofthe art in this area and it is hoped that it will be used as an incentive for further studies particularlywith reference to new areas ofresearch. In the organisation ofthe scientific programme for the NATO meeting we would like to acknowledge the assistance ofProfessors J. Lyklema, D. G. Hall and J. Holzwarth. We wish to thank Miss Mandy Rudd for all the secretarial assistance in setting up the meeting and for the invaluable assistance in preparing the manuscripts. In connection with the proceedings we would also like to thank Miss Sandra Fahy for assistance. The help of Paul Jones and Mrs G. Wyn-Jones during the meeting is also gratefully acknowledged.

The Time-Resolved Fluorescence Quenching Method for the Study of Micellar Systems and Microemulsions: Principle and Limitations of the Method.- Solubilization of Alcohols and Alkanediols in Aqueous Surfactant Solutions.- Thermodynamics of Solubilization into Surfactant Micelles.- Application of the Differential Conductivity Method: The Effect of Chain-Length of Homologous Surfactants on the Partition Coefficient of Alkanols Between Bulk Water and Micelles.- Mixed Micelle Theory as an Aid to Surfactant Formulation.- Partitioning of Cationic Surfactants Between Heptane and Water.- Adsorption of Sodium Dodecyl Sulfate and 1-Butanol on Solid Aluminium Oxide.- Association Models for Phenothiazine Drugs in Aqueous Solution.- Polymer-Surfactant Systems.- Kinetic and Equilibrium Studies Associated with Polymer Surfactant Interactions.- The Interaction of Amphiphiles with Molecular Assemblies and Polymers.- Step-Weighted Random Walk Statistics, as Applied to Association Colloids.- A PopulationBalance Model for the Determination of Solubilizate Exchange Rate Constants in Reversed Micellar Systems.- Selective Solubilisation in Reversed Micelles.- When is a Microemulsion a Microemulsion?.- Uni-And Bicontinuous Microemulsions.- Experimental and Computational Aspects of the Time-Correlated Single Photon Counting Technique.- Droplet Size and Dynamics in Water oil Microemulsions. Correlations Between Results from Time-Resolved Fluorescence Quenching, Quasielastic Light Scattering, Electrical Conductivity and Water Solubility Measurements.- The Influence of the Distribution of Salt on the Phase Behaviour of Microemulsions with Ionic Surfactants.- A Study of Microemulsion Stability.- Structure of Microemulsion-Based Organo-Gels.- Luminescence Probe Study of Organized Assemblies Treated as Fractal Objects.- Organized Assemblies in Chemical Separations.- Structural Changes of Aot Reverse Micelles by the Presence of Proteins: Percolation Process Induced by Cytochrome C.- MicroparticleFormation in Reverse Micelles.- Electric Birefringence Measurements in Micellar and Colloidal Solutions.- Surfactant Liquid Crystals.- The Phase Behaviour of Metal(II) Soaps in One, Two and Three Component Systems.- Ringing Gels: Their Structure and Macroscopic Properties.- Industrial Hydrocolloids.- Kinetics of the Interaction of the Potential-Sensitive Dye Oxonol V with Lipid Vesicles.- Equilibrium and Dynamic Investigation on the Main Phase Transition of Dipalmytoylphosphatidylcholine Vesicles Containing Polypeptides: A Dsc and Iodine Laser T-Jump Study.- An Investigation on the Penetration of Lipids in the Bilayer of Stratum Corneum.- Foam Stability in Non-Aqueous Multi-Phase Systems.- The Profile of a Plateau Border Near a Vertical Foam Film.- The Anamolous Effect of Electrolytes on Surfactant Monolayer Surface Pressure-Area Isotherms.- Surfactant Molecular Geometry Within Planar and Curved Monolayers in Relation to Microemulsion Phase Behaviour.- Light Scattering Experiments on Anisotropic Latex Particles.- Electric Birefringence Studies of Micellar and Colloidal Dispersions.- Polymers at Interfaces: Statics, Dynamics and Effects on Colloidal Stability.- Equilibrium Structure and Properties of Colloidal Dispersions.- Structure, Dynamics and Equilibrium Properties of Inorganic Colloids.- The Rheology of Concentrated Dispersions of Aggregated Particles.- Rheological Properties, Interparticle Forces and Suspension Structure.- Interfacial Rheology and its Application to Industrial Processes.- Effective Interaction Potentials of Colloids from Structural Data: The Inverse Problem.- Computer Simulation of the Coagulation and Flocculation of Colloidal Particles.- Computer Simulations of Fluids and Solutions of Organic Molecules.- The form of Colloidal Crystals from Silica Latices in Nonaqueous Dispersion.- Consolidation of Depletion Flocculated Concentrated Suspensions: Influence of Non Adsorbing Polymer Concentration on Consolidation Rate Constants.- Colloidal Semiconductors.- Obtention and Characterisation of Ultrafine Magnetic Colloidal Particles in Solution.- Non-Equilibrium Double Layers in Connection with Colloid Stability.- Recent Theories on the Electric Double Layer.- Application of Double Layer Theory to Moderately Complex Systems.- Wetting Phenomena.- Thermodynamics of Adsorption from Dilute Solutions.- List of Participants.- Index of Subjects.