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Ezeugo , J.O., Nwanekezie , M.N., Onukwuli, O.D., Olisa-Bosah, C.C. and Ezeh , L.I. 2019. Optimization of Phytochemical Screening Analysis of Ocimum Gratissimum Leaf Oil Extraction Process . Earthline Journal of Chemical Sciences. 1, 2 (Apr. 2019), 139-158. DOI:https://doi.org/10.34198/ejcs.1219.139158.