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Chikere G Nkwonta

Postdoctoral Researcher – Food Safety

Research Interests

Dr Chikere Nkwonta is a Research Fellow in the Food Safety Department of Teagasc Food Research Centre Ashtown. He is a Bioscientist with specialty in Biochemistry and Biomedicine applications in Agrifood. His research experience spans through nutrients, chemical residues, and secondary metabolite analysis in agricultural/ food matrices using various high throughput liquid and gas chromatography tandem mass spectrometer instruments. He also has expertise in synthetic and natural product toxicological assessment using cell lines and animal models. His interests are on studies relating to food safety, and integrity as well as assessment of phytochemicals with nutritional and medicinal benefits.

Current Projects

NBPT-Safe: Ensuring food safety in grass systems using NBPT treated Urea.


  • 2016 PhD Agrifood – Biochemistry and Biomedicine, Cranfield University UK
  • 2008 MSc in Biochemistry with specialization in  nutritional and toxicology, University of Nigeria
  • 2004 BSc in Biochemistry and Microbiology (Combined honours), University of Nigeria

Professional Membership

  • Royal Society of Biology, UK (MRSB)
  • Associate Fellow Higher Education Academy, UK (AFHEA)
  • International Society for Horticultural Sciences, UK
  • Chikere G Nkwonta, Macdara O’ Neill, Mary Moloney, Niharika Rahman, Patrick J Forrestal, Sean A Hogan3, Karl Richards, Enda Cummins and Martin Danaher (2021). Development of one-step extraction and sensitive UHPLC-MS/MS method for assessment of NBPT and NBPTo in milk. Molecules. (Accepted for publication)
  • Chikere Nkwonta, Leon A. Terry, Carmen Alamar Gavidia, Selim Cellek (2021). Overview of potential individual phenolic compounds of African walnut extracts and cytotoxicity assessment in a lung cancer cell line A549. Acta Horticulturae. (Accepted for publication)
  • Ezim Ogechukwu Ebere and Nkwonta Chikere Godwin (2021). Assessment of Ricinus communis (Castor Oil) Seed as Potential Protein Source in Weanling Diet Formulations, American Journal of BioScience. Vol. 9, No. 2, pp. 42-46. doi: 10.11648/j.ajbio.20210902.12
  • Maria P Byrne, John T Tobin, Patrick J Forrestal, Martin Danaher, Chikere G Nkwonta, Karl Richards, Enda Cummins, Sean A Hogan, Tom F O’Callaghan (2020) Urease and Nitrification Inhibitors—As Mitigation Tools for Greenhouse Gas Emissions in Sustainable Dairy Systems: A Review. Sustainability 12 (15), 6018. https://doi.org/10.3390/su12156018
  • Aishwarya Ray, Chikere Nkwonta, Patrick Forrestal, Martin Danaher, Karl Richards, Tom O’Callaghan, Sean Hogan, Enda Cummins (2020). Current knowledge on urease and nitrification inhibitors technology and their safety. Reviews on Environmental Health. DOI: https://doi.org/10.1515/reveh-2020-0088
  • Chikere G Nkwonta., M. Carmen Alamar, Sandra Landahl, Terry, L.A., 2016. Effects of postharvest storage and processing techniques on the main fatty acids in the profile of oil extracted from African Walnut (Tetracarpidium conophorum Mull. Arg.). Journal of Food Composition and Analysis, 45, 87–94. doi:10.1016/j.jfca.2015.10.001.
  • Chikere G Nkwonta., Medina, A., Alamar, M.C., Terry, L.A., 2015. Impact of postharvest processing on the fungal population contaminating African walnut shells (Tetracarpidium conophorum Mull. Arg) at different maturity stages and potential mycotoxigenic implications. International Journal of Food Microbiology, 194, 15-20. http://dx.doi.org/10.1016/j.ijfoodmicro.2014.10.024
  • Okafor, O., Ezeanyika, L., Nkwonta, C., Okonkwo, C. (2015). Plasma Lipid Profiles and Atherogenic Indices of Rats Fed Raw and Processed Jack Fruit (Artocarpus heterophyllus) Seeds Diets at Different Concentrations. World Academy of Science, Engineering and Technology, International Science Index 104, International Journal of Biological, Biomolecular, Agricultural, Food and Biotechnological Engineering 9(8), 812 - 816. https://waset.org/Publication/plasma-lipid-profiles-and-atherogenic-indices-of-rats-fed-raw-and-processed-jack-fruit-artocarpus-heterophyllus-seeds-diets-at-different-concentrations/10001915 
  • Nkwonta C. G., Ezeokonkwo, C. A. and Obizoba, I. C (2013). Comparative effects of moist and dry heat on nutrient potentials of Tetracarpidium conophorum nut in rats. Pakistan Journal of Nutrition 12 (1) 89-92. DOI: 10.3923/pjn.2013.89.92
  • Rural Futures II: Towards Sustainable Solutions for Ruminant Pastoral Agricultural Systems in Scotland and Ireland, Dublin Ireland, February 2021 (Virtual). Paper Title: Investigation of the factors affecting the stability of NBPT in fertilizers. Poster
  • International Society of Horticultural Sciences 8th International Symposium on Human Health Effects of Fruits and Vegetables, Stuttgart Germany, March 2021 (Virtual). Paper title: Overview of potential individual phenolic compounds of African walnut extracts and cytotoxicity assessment in a lung cancer cell line (A549). Oral presentation.
  • Institute of Food Science and Technology 49th Annual Food Science and Technology Conference, Dublin, Ireland 2020. Paper title: Understanding and Tracking the Breakdown NBPT and Its Breakdown Product NBPTo during Heat Processing of Spiked Milk samples. Poster presentation.