Dr. Olukayode Ajayi

Email Address: osajayi@oauife.edu.ng

Staff: Academic Staff

Rank in the department: Senior Lecturer

Short Bio, Academic, and Research Activities:

“Dr. Ajayi started his academic career as an Assistant Lecturer in the Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria in December 2006. He became Lecturer II in October 2012. He was awarded the 2011 TERTFund Academic Staff Training and Development Grant to visit Prof. R.R.T. Majinda’s Phytochemistry Laboratory, Department of Chemistry, University of Botswana, Gaborone, Botswana, in March 2013 to carry out some aspects of his PhD research work. He returned in August 2013. He was promoted to Lecturer I and Senior Lecturer in October 2015 and October 2018 respectively. Areas of specialization and research Interest include Organic Chemistry/Natural Products Chemistry. Dr. Ajayi has served either as a supervisor or co-supervisor of six (6) students at the master’s level and one (1) PhD student. He is a member of some professional bodies such as the Chemical Society of Nigeria (CSN), the Institute of Public Analysts of Nigeria (IPAN), Western Africa Network of Natural Products Research Scientists (WANNPRES).

Office/Room Number: Room. 131 Part II Chemistry Laboratory (First Floor, White House), Department of Chemistry, OAU, Ile-Ife.

Area of Specialization: Organic Chemistry/Natural Products Chemistry

Current Research Projects for Postgraduate Students:

Bioactivity studies of extracts and isolated compounds of some selected medicinal plants

List of Selected Publications (with DOI Number or a Hyperlink):  

“Ajayi, O. S., Aderogba, M. A., Obuotor, E. M. and Majinda, R. R. T (2017). Antioxidant activities of the extracts and isolated compounds from Treculia africana (Decne) leaf. Nigerian Journal of Natural Products and Medicine, 21(1): 32-38. DOI: https://dx.doi.org/10.4314/njnpm.v21i1.5. (Nigeria).

Ajayi, O. S., Aderogba, M. A., Obuotor, E. M. and Majinda, R. R. T. (2019).  Acetylcholinesterase inhibitor from Anthocleista vogelii leaf extracts. Journal of Ethnopharmacology, 231: 503-506. DOI: https://doi.org/10.1016/j.jep.2018.11.009. (The Netherlands).

Ajayi, O. S., Aderogba, M. A., Akinkunmi, E. O., Obuotor, E. M., and Majinda, R. R. T. (2020). Bioactive compounds from Nauclea latifolia leaf extracts. Journal of King Saud University-Science, 32(4): 2419-2425. DOI: https://doi.org/10.1016/j.jksus.2020.03.031. (Saudi Arabia).

Adeniran, A. A., Sonibare, M. A., Ajayi, O. S., Rajacharya, G. H. and Kumar, S. (2020). Antioxidant activity of columns fractions and caryatin isolated from ethyl acetate extracts of Dioscorea hirtiflora tuber. Tropical Journal of Natural Products Research, 4(7): 276-281. DOI: https://doi.org/10.26538/tjnpr/v4i7.4. (Nigeria).

Balogun, O. S., Ajayi, O. S., Owolabi, T. A., Oladimeji, A. O. and Liu, Z. (2021). Chemical constituents and antibacterial activity of Cissus aralioides. Letters in Organic Chemistry, 18(4): 281-286. DOI: https://doi.org/10.2174/1570178617999200609130127. (UAE).

Ajayi, O. S., Balogun, O. S., Olawuni, J. I., October, N., Adigun, R. and Akinlade, I. G. (2021) Alpha amylase inhibition and antioxidant activities of bicyclic diterpenoid lactones from Andrographis paniculata. Tropical Journal of Natural Product Research, 5(6): 1110-1117. DOI: http://www.doi.org/10.26538/tjnpr/v5i6.22. (Nigeria).

Olabanji, I. O., Akinkunmi, E. O., Aniki, N. I, Arowosegbe, S. M., Ajayi, O. S., Yoade, R., Fasesan, F. (2021). Exploring the antimicrobial activities of Chrysophyllum albidum seed oil in pharmaceutical and the seeds in food industry. Journal of Food and Pharmaceutical Sciences, 9(2): 412-421. (Indonesia).

Sanusi, K., Ajayi, O. S., Borisade, A. O., Elusiyan, R. B., Yilmaz, Y. and Ceylan, U. (2021). I-V curves of an apigenin dye and their analysis by a new parabolic function. Frontiers in Chemistry (Physical Chemistry), 9: 643578. DOI: 10.3389/fchem.2021.643578. (Switzerland).

Olayiwola, M. O., Ajayi, O. S., Balogun, I. J. Olawuni, S. M. Adeyemo and October, N. (2021). Isolation, identification, and biological activities of the constituents of Hibiscus rosa-sinensis leaf extract. Ife Journal of Science and Technology, 5(1):33-48. (Nigeria).

Balogun, O. S., Ajayi, O. S., Emekako, A., Ogunlowo, I. I. and Zhiqiang, L. (2023). GC-MS analysis, antioxidant and enzyme inhibitory activities of volatile and solvent extract of Pteris togoensis. Journal of the Chemical Society of Nigeria (JCSN), 48(3): 409-419. (Nigeria).

Google Scholar and/ Scopus Link(s):

https://scholar.google.com/citations?hl=en&user=tRM7meMAAAAJ