1. Materials Science & Engineering Department, African University of Science & Technology (AUST), Abuja, Nigeria
2. Head of Chemistry Department, Faculty of Science, University of Buea, Buea, Cameroon
3. Head of Materials Science & Engineering Department, African University of Science & Technology (AUST), Abuja, Nigeria
4. Laboratory of Mechanic and Adapted Materials (LAMMA), ENSET-University of Douala, Douala, Cameroon
5. Biosystems Engineering Department, University of São Paulo (USP), São Paulo, Brazil