College of Natural and Applied Sciences, Igbinedion University, Okada, Edo State, Nigeria Publisher contact person: Prof. Longy O. Anyanwu Email: [email protected], [email protected] Phone: +234 81 64004804 Mailing address:  College of Natural and Applied Sciences, Igbinedion University, Okada, Edo State, Nigeria www.iuokada.edu.ng