1. Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
2. Department of Mathematics and Statistics, University of Calabar, Calabar, Nigeria
3. Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria
4. Department of Chemistry, University of Ilorin, Ilorin, Nigeria
5. Department of Physics, University of Calabar, Calabar, Nigeria