1. Department of Food Biotechnology and Nutritional Sciences. School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O.Box 447, Arusha, Tanzania
2. Ecology of Tropical Agricultural Systems, Hans Ruthenberg Institute, University of Hohenheim, Stuttgart 70599, Germany
3. Department of food science and technology. Mwalimu Julius K. Nyerere University of Agriculture & Technology, P. O. Box 976, Musoma, Tanzania
4. University of Applied Sciences, Wels 4600, Upper Austria, Austria
5. Department of Sustainable Agriculture, Biodiversity Conservation and Ecosystems Management, the Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O.Box 447, Arusha, Tanzania