1. Department of Food Technology, Engineering and Nutrition, Lund University, P.O. Box 124, S-22100 Lund, Sweden; Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands; Department of Corporate Research, Friesland Coberco Dairy Foods, P.O. Box 87, NL-7400 AB Deventer, The Netherlands; and Department of Physical Chemistry 1, Lund University, P.O. Box 124, S-22100 Lund, Sweden