1. Dept. of Food Biotechnology and Food Process Engineering; Technische Univ. Berlin; Koenigin-Luise-St. 22 D-14195 Berlin Germany
2. Food and Environment Research Agency; Sand Hutton YO41 1LZ York UK
3. Dept. of Food Analysis and Nutrition; Inst. of Chemical Technology; 5 Technika 16628 Prague 6 Prague Czech Republic
4. Leibniz Inst. for Agricultural Engineering (ATB) Max-Etyth-Allee 100; 14469 Potsdam Germany