1. Food Technology, Faculty of Engineering LTH; Lund Univ.; PO Box 124 Lund S-221 00 Sweden
2. School of Chemistry, Faculty of Pure and Natural Sciences; Univ. Mayor de San Andrés; PO Box 303 La Paz Bolivia
3. Food and Meal Science; Kristianstad Univ.; PO Box 15 Kristianstad S-291 81 Sweden
4. Biotechnology, Faculty of Engineering LTH; Lund Univ.; PO Box 117 Lund S-221 00 Sweden