1. DECHEMA e.V., Karl-Winnacker-Institut, Biochemical Engineering, P.O. Box 150104, D-60061 Frankfurt/Main, Germany; Department of Life Technologies, University of Applied Sciences Valais, Route du Rawyl 47, CH-1950 Sion 2, Switzerland; and Institut für Lebensmittelchemie, Johann Wolfgang Goethe-Universität, Max-von-Laue-Strasse 9, D-60438 Frankfurt/Main, Germany