1. Arthur Nwachukwu Nwachukwu:
Williamson Research Centre for Molecular Environmental Sciences School of Earth, Atmospheric and Environmental Sciences, The University of Manchester, UK, M13 9PL; Department of Physics, Alex Ekwueme Federal University, Ndufu-Alike Ikwo, Ebonyi State, Nigeria
2. Andrew Aondoaver Tyopine:
Department of Chemistry, Alex Ekwueme Federal University, Ndufu-Alike Ikwo, Ebonyi State, Nigeria
3. Bassey Edem Ephraim:
Department of Geology, Faculty of Science, University of Calabar, Calabar, Cross River State, Nigeria