1. Department of Materials and Energy Science & Engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
2. Department of Chemistry, Dar es Salaam University College of Education, Dar es Salaam, Tanzania
3. Department of Chemistry, Faculty of Natural and Applied Sciences, St. John's University of Tanzania, Dodoma, Tanzania
4. Department of Basic Sciences, School of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
5. Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
6. Department of Water and Environmental Science and Engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
7. Department of Chemistry, University of Buea, Buea, Cameroon
8. Department of Pharmaceutical Chemistry, Martin-Luther University Halle-Wittenberg, Halle, Germany
9. Institute of Botany, Technical University of Dresden, Dresden, Germany