1. Unilever R & D, Olivier van Nortlaan 120, 3133 AT Vlaardingen, The Netherlands, Food Science Australia, Private Bag 16, Werribee, Victoria 3030, Australia, Department of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom, Department of Food and Nutritional Sciences, University College Cork, Cork, Ireland, and Institute of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand