1. Department of Food Science and Technology, Faculty of Agriculture; Jomo Kenyatta University of Agriculture and Technology; P.O. Box 62000-00200 Nairobi Kenya
2. Laboratory of Food Technology, Leuven Food Science Nutrition Research Center (LFoRCe), Department of Microbial and Molecular Systems (M S); KU Leuven; Kasteelpark Arenberg 22 Box 2457 3001 Heverlee Belgium