1. Okonkwo, C.G., I.A. Uju and R.O. Nwajuonye, 2022. Improvement of three phase induction motor performance using voltage and frequency speed control techniques. J. Eng. Res. Rep., 22: 19-31.
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2. Ashaolu, C.A., C.O. Okonkwo, E. Njuguna and D. Ndolo, 2022. Recommendations for effective and sustainable regulation of biopesticides in Nigeria. Sustainability, Vol. 14. 10.3390/su14052846.
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3. Abdulhakeem R. Agboola, C.O. Okonkwo, E.I. Agwupuye and G. Mbeh, 2022. Biopesticides and conventional pesticides: Comparative review of mechanism of action and future perspectives. AROC Agric., 1: 14-32.
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4. Simeon, E.I. and C. Okonkwo, 2021. Neuroprotective potentials of Alstonia boonei extracts on biochemical markers of brain integrity in experimental rats. Trop. J. Nat. Prod. Res., 5: 1106-1109.
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5. Onyenweaku, E.O., P.A. Ebai, C.O. Okonkwo and W.A. Fila, 2021. Comparative evaluation of the nutrient and anti-nutrient contents of edible flours consumed in Nigeria. Afr. J. Food Agric. Nutr. Dev.. 21: 17254-17271.
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6. Okonkwo, C.O., G.C. Obinna and O.G. Elayeche, 2020. Production of biodiesel as commodity chemical using plant seed oils and its relevance for nation sustainable development: A review. Global J. Biotechnol. Biochem., 15: 32-43.
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7. Okonkwo, C.O., E. Onyenweaku and J.O. Uwujibha, 2020. Comparative assessment of nutrient composition of aquacultured and wild catfish (Clarias gariepinus) in cross rivers state Nigeria. Asian J. Fish. Aquat. Res., 10.9734/ajfar/2020/v8i230133.
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8. Okonkwo, C.O. and P.S. Udodia, 2020. Chemical composition of three different fractions obtained from the leaves of cassia occidentalis. Annu. Res. Rev. Biol., 10.9734/arrb/2019/v34i530163.
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9. Okonkwo, C.O. and O.C. Ohaeri, 2020. Comparative study of steam distillation and soxhlet for the extraction of botanical oils. Asian J. Biol. Sci., 13: 62-69.
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10. Okonkwo, C., D. Jain, R.A. Khan and S. Kumar, 2020. Occupational Exposure and Environmental risk factors for Hepatocellular Carcinoma. 1st Edn., ISBN: 9781637457481. .
11. Okonkwo, C. Onyinye and O.O. Christopher, 2020. Insecticidal oils from the leaves of Cassia occidentalis and Euphorbia milii may induce hormonal changes in rats. Asian J. Biochem., 15: 1-6.
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12. Egba, S.I, C.O. Okonkwo, J.O. Ogbodo and E. Dike, 2020. Contraceptive potentials of Alstonia boonei via stimulation of increased prolactin synthesis in experimental female wistar rats. J. Cult. Heritage, 1: 43-50.
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13. Onyinye, O.C., O.O. Christopher and A.J. Item, 2019. Safety of insecticidal oils from Cassia occidentalis and Euphorbia milii on biochemical markers of tissue integrity. Trends Appl. Sci. Res., 14: 303-309.
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14. Onyinye, O.C. and O.O. Christopher, 2019. Essential oils from the leaves of Euphorbia milii and Cassia occidentalis exert insecticidal action through gene toxicity. Asian J. Biol. Sci., 12: 140-147.
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15. Okonkwo, C.O. and O.C. Ohaeri, 2019. Mechanism of insecticidal action of oil extracted from the leaves of Cassia occidentalis. Asian J. Agric. Res., 12: 19-24.
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16. Okonkwo, C.O. and O.C. Ohaeri, 2018. Insecticidal efficacy and chemical composition of hexane oil extracts from the leaves of Euphorbia milii and Cassia occidentalis. Int. J. Biochem. Res. Rev., 23: 1-11.
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17. Okonkwo, C. and C. Onyeji, 2018. Insecticidal potentials and chemical composition of essential oils from the leaves of phyllanthus amarus and stachytarpheta cayennensis in Nigeria. Int. J. Biochem. Res. Rev., 22: 1-16.
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18. Okonkwo, C.O. and U.J. Ozoude, 2015. The impact of processing on the nutritional, mineral and vitamin composition of palm kernel nut (Elaeis guineensis). Afr. J. Food Sci., 9: 504-507.
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19. Okonkwo, C.O. and V.C. Egeolu, 2014. Anti-haemolytic potentials of the ethanolic leaf extract of dracaena arborea on zidovudine-induced hemolysis in wistar albino rats. Int. J. Sci. Technol., Vol. 2. .
20. Okonkwo, C.O. and U.J. Ozoude, 2014. The impact of processing on the nutrient content, vitamin and mineral composition of African Walnut (Tetracarpidium conophorum). Int. J. Novel Res. Life Sci., 1: 10-16.
21. Okonkwo, C. and A. Ogu, 2014. Nutritional evaluation of some selected spices commonly used in the South-Eastern part of Nigeria. J. Biol. Agric. Healthcare, 4: 97-102.
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22. Egba, S.I., I.D. Udom and C.O. Okonkwo, 2014. Comparative effect of oral administration of some dietary lipids on fertility hormones of female wistar albino rats. Global J. Biotechnol. Biochem., 9: 24-29.
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23. Okonkwo, C.O. and O.C. Ohaeri, 2013. Insecticidal potentials of some selected plants. J. Chem. Pharm. Res., 5: 370-376.
24. Okonkwo, C.O and A.A. Uwakwe, 2013. The in vitro effects of zidovudine (an antiretroviral drug) on human erythrocyte haemoglobin-S-gelation. J. Pharm. Biol. Sci., Vol. 7. .