Position: Lecturer
Qualifications: PhD
Department: Biochemistry, Microbiology and Biotechnology
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Research Interests

Characterization of Antimicrobial, Antioxidant etc of Medicinal Plants, In vitro culture and 
Transformation of Plant cells, tissue and organs for crop improvement and production of secondary 
metabolites using hairy roots, Isolation, identification and characterization of endophytes for 
production of secondary metabolites and enzymes for biotechnology applications and Production 
and Characterization of Enzymes from microorganisms for Biofuel Production and Industrial 
applications.

Publications Referred Journals

  • Munyasi KM, Omwenga GI, Mwamburi FM. Production and characterization of cellulolytic enzymes by Chaetomium globosum for biomass saccharification and ethanol production. Discovery 2024; 60:e14d1425 doi: https://doi.org/10.54905/disssi.v60i334.e14d1425
  • Githaiga FM, Omwenga GI, Ngugi MP. In vivo ameliorative effects of vitamin E against hydralazine-induced lupus Lupus Science & Medicine 2023;10:e001033. doi: 10.1136/lupus2023-001033
  • Irafasha, G., Mutinda, S., Mobegi, F., Hale, B., Omwenga, G., Wijeratne, A. J., Wicke, S., Bellis, E. S., & Runo, S. (2023). Transcriptome atlas of Striga germination: Implications for managing an intractable parasitic plant. Plants, People, Planet, 1 15. https://doi.org/10.1002/ppp3.10395
  • Nyalo P, Omwenga G, Ngugi M. Quantitative Phytochemical Profile and In Vitro Antioxidant Properties of Ethyl Acetate Extracts of Xerophyta spekei (Baker) and Grewia tembensis (Fresen). Journal of Evidence-Based Integrative Medicine. 2023;28. doi:10.1177/2515690X231165096.
  • Paul Ochieng Nyalo, George Isanda Omwenga and Mathew Piero Ngugi (2023). Antibacterial properties and GC-MS analysis of ethyl acetate extracts of Xerophyta spekei (Baker) and Grewia tembensis (Fresen). HELIYON (2023), doi: https://doi.org/10.1016/j.heliyon.2023.e14461.
  • Biwott Kipchumba, Alfred Orina Isaac, Victoria K. Mwaeni, George Omwenga, Mathew Ngugi, and James Nyabuga Nyariki (2023). Vitamin B12 and coenzyme Q10 ameliorated alcohol driven impairment of hematological parameters, inflammation, and organ damage in a mouse model. Nutrire (2023) 48:13 https://doi.org/10.1186/s41110-023-00197-9
  • Spora Aloyce Mavanza, George Isanda Omwenga, Mathew Piero Ngugi (2023). Antibacterial and phytochemical effects of ethanol extracts of Syzygium guineense (Willd.) DC barks and Mangifera indica L seeds. Journal of Advanced Biotechnology and Experimental Therapeutics 
    2023 May; 6(2): 337-349 eISSN: 2616-4760, https://doi.org/10.5455/jabet.2023.d130
  • Justus K. Kasivalu, George I. Omwenga, and Gabriel O. Aboge (2022). Molecular Detection and Characterization of Pasteurella multocida Infecting Camels in Marsabit and Turkana Counties, Kenya. International Journal of Microbiology Volume 2022, Article ID 9349303, 6 
    pages https://doi.org/10.1155/2022/9349303
  • Paul Ochieng Nyalo , George Isanda Omwenga, and Mathew Piero Ngugi (2022). GC-MS Analysis, Antibacterial and Antioxidant Potential of Ethyl Acetate Leaf Extract of Senna singueana (Delile) Grown in Kenya. Evidence-Based Complementary and Alternative Medicine Volume 2022, Article ID 5436476, 15 pages https://doi.org/10.1155/2022/5436476
  • Evans Kapanat Akimat, George Isanda Omwenga, Gervason Apiri Moriasi, and Mathew Piero Ngugi. (2021). Antioxidant, Anti-Inflammatory, Acute Oral Toxicity, and Qualitative Phytochemistry of The Aqueous Root Extract of Launaea cornuta (Hochst. Ex Oliv. & Hiern.). Journal of Evidence-Based Integrative Medicine Volume: 26: 1-12. https://doi.org/10.1177/2515690X211064
  • Victoria K. Mwaeni, James N. Nyariki, Ngalla Jillani, George Omwenga, Mathew Ngugi and Alfred Orina Isaac (2021). Coenzyme Q10 protected against arsenite and enhanced the capacity of 2,3- dimercaptosuccinic acid to ameliorate arsenite-induced toxicity in mice. BMC Pharmacology and Toxicology (2021) 22:19 https://doi.org/10.1186/s40360-021-00484-z
  • Berick Moturi Sieberi, George Isanda Omwenga, Rachael Kitondo Wambua, Judith Chemutai Samoei, and Mathew Piero Ngugi (2020). Screening of the Dichloromethane: Methanolic Extract of Centella asiatica for Antibacterial Activities against Salmonella typhi, Escherichia 
    coli, Shigella sonnei, Bacillus subtilis, and Staphylococcus aureus. The Scientific World Journal Volume 2020, Article ID 6378712, 8 pages https://doi.org/10.1155/2020/6378712
  • Machani G Fridah, Muchugi Alice, Ngugi M Piero, Jamnadass Ramni, Omwenga I George, Kariba Robert, Mngomba Simon and Prasad Hendre (2017). Molecular Characterization of Sclerocarya birrea ICRAF Field Genebank Collections. Journal of Phylogenetics & Evolutionary 
    Biology, 5:3. doi: 10.4172/2329-9002.1000190

Conference Contributions

  • Callus Development and Somatic Embryogenesis in diverse explants of cowpea [Vigna unguiculta (L.)Walp]. George Omwenga and Don W. Smith . Presented at the Spring 2004 meeting of the Texas Society for Mircoscopy, Houston, Texas, April 22-24, 2004.
  • In vitro Callus and Root Formation from Diverse Explants of Cowpea (Vigna unguiculata (L.) Walp. George Omwenga and Don W. Smith. Presented at the Spring meeting of the Texas Society for Mircoscopy, Houston, Texas, October 28-30, 2002.
  • Rapid in vitro propagation of Albizia falcataria, a leguminous tree. Ghosh, N., George I. Omwenga, and Don W. Smith. Presented at the 76th Annual Meeting of the Southwestern and Rocky Mountain region of the American Association for the Advancement of Science, Denton, Texas March 25-28 2001.
  • Paul Ochieng Nyalo, George Isanda Omwenga and Mathew Piero Ngugi. Phytochemical Profile Composition And Comparative in Vitro Antioxidant Properties Of Ethyl Acetate Extracts Of Xerophyta spekei (Baker) and Grewia spekei (Fresen). CONFERENCE ON BASIC AND APPLIED SCIENCES. Embracing Science & Technology for Resilience and Transformation. 16TH - 18TH November, 2022. 
    Held at School of Pure and Applied Sciences, Kenyatta University.

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