PART 1 FUNDAMENTAL ASPECTS OF ACID-BASE INTERACTIONS: Repulsive acid-base interactions - Fantasy or reality, W.V. Chang and X. Qin; Troubleshooting of surface free energy acid-base theory applied to solid surfaces - the case of Good, van Oss and Chaudhury theory, C. Della Volpe and S. Siboni; Contact angle measurements and contact angle interpretation - relevance to the thermodynamics of adhesion, D.Y. Kwok and A.W. Neuman; On the acid-base theory of contact angles, R.J. Good; Acid-base interactions as the driving force for both hydrophobic attraction and hydrophilic repulsion, C.J. van Oss; Irrelevance of the ratio of the electron-accepticity to the electron-donicity of water with respect to the determination of polar surface tension components, interfacial tensions and free energies of interaction of liquids and/or solids, C.J. van Oss; Electronic properties and modifications of acid-base strengths at non-stoichiometric and polar oxide surfaces, F. Finocchi and C. Noguera; Accurate calculations of core-electron binding energies (CEBEs) via density functional theory - towards an evidencing of acid-base effects at real interfaces via XPS, J. Charlier, C. Bureau, D.P. Chong, S. Kranias and G. Lecayon; Acid-base interactions at the molecular level - Adhesion and friction studies with interfacial force microscopy, A.R. Burns, J.E. Houston, R.W. Carpick and T.A. Michalske; Quantifying the impact of surface complexation on acid-base interactions, M.A. Butkus and D. Grasso; Acid-base interactions on surfaces of wet and dry inorganic oxides, C.I. Contescu and J.A. Schwarz. PART 2 CHARACTERIZATION OF THE ACID-BASE PROPERTIES OF MATERIALS: Characterization of acid-base properties of polymer surfaces by XPS, M.M. Chehimi, M. Delamar, J. Kurdi, F. Arefi-Khonsari, V. Lavaste and J.F. Watts; Determination of the acid-base properties of solid surfaces using Inverse Gas Chromatography - advantages and limitations, H. Balard, E. Brendle and E. Papirer; Surface energy and acid-base properties of solids studied by immersion calorimetry, J.-M. Douillard and V. Medout-Marere; Comparison of two procedures for assessing the acidity of polymer surfaces graded in acid content, T.B. Lloyd and J.A. Coleman; Comparison of acid-base characterization techniques on lignocellulosic surfaces, D.J. Gardner, S.Q. Shi and W.T. Tze; Assessment of acid-base character of polymer surfaces from contact angle and other surface chemical data, F.M. Etzler, J. Simmons, N. Ladyzhynsky, V. Thomas and S. Maru; Characterization of acid-base properties of surfaces by contact angle titration - application to the adhesive bonding of silicon carbide, S. Helt, J. Evieux, Y. Baziard, V. Nassiet and J.-A. Petit; Thin layer wicking - methods for the determination of acid-base free energies of interaction, E. Chibowski; Determination of the acid-base properties of the human skin surface - influence of skin lipids, A. Mavon. (Part contents).