Laboratory of Quality and Safety of Agro-food Products TERRA Gembloux AgroBio-Tech University of Liege Passage des Déportés 2 5030 Gembloux-Belgium;
Laboratory of chemistry of natural molecules Gembloux Agro-Bio Tech Univervity of Liege Passage des Déportés 2 5030 Gembloux-Belgium;
Laboratory of Nutrition and Nutritional Biochemistry Department of Biochemistry Faculty of Sciences Yaounde I university PO.Box:812 Yaounde Cameroon;
National Institut of Cartography Ministry of Scientific Research and Innovations PO.Box: 157 Yaoundé Cameroon;