(1) Department of Industrial Chemistry Edo State University Uzairue (EDSU), Edo State, Nigeria ,

(2) Department of Chemistry University of Benin, Benin City,, Nigeria ,

(3) Department of Vocational and Technical Education Ambrose Alli University, Ekpoma, Edo State, Nigeria

(1) Olive Research Institute, Universite Cd. No:43 35100, Izmir, Turkey ,

(2) Olive Research Institute, Universite Cd. No:43 35100, Izmir, Turkey

(1) Centre for Development Research, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria

(1) Marondera University of Agricultural Sciences and Technology (MUAST), Department of Applied Sciences P.O. Box 35 Marondera, Zimbabwe ,

(2) University of Zimbabwe, (UZ). Department of Nutrition, Dietetics and Food Sciences, P.O Box MP 167 Mt Pleasant, Harare, Zimbabwe ,

(3) Marondera University of Agricultural Sciences and Technology MUAST), Centre for Innovation and Technology Transfer, P.O. Box 35 Marondera, Zimbabwe