1. Wageningen Centre for Food Sciences, P.O. Box 557, 6700 AN Wageningen, The Netherlands, Van’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Texture Department, NIZO Food Research, Kernhemsweg 2, P.O. Box 20, 6710 BA Ede, The Netherlands