1. Nestlé Research Center, CH-1000 Lausanne 26, Switzerland, Chalmers University of Technology, Department of Chemical and Biological Engineering, Applied Surface Chemistry, SE-412 96 Göteborg, Sweden, Max-Planck-Institut für Kolloid- and Grenzflächenforschung, Max-Planck-Campus, D-14476 Golm, Germany, and Medical Physicochemical Center Donetsk Medical University, 16 Ilych Avenue, 83003 Donetsk, Ukraine