2 Department of Nutritional and Food Sciences, Molecular Food Technology, University of Bonn, Endenicher Allee 19b, D-53115 Bonn, Germany. Electronic address: Schieber@uni-bonn.de.
3 Department of Beverage Research, Analysis and Technology of Plant-based Foods, Geisenheim University, Von-Lade-Strasse 1, D-65366 Geisenheim, Germany.