Dr. Wanyika Harrison Njuma

Dr. Harrison Wanyika

Office location: NSC First Floor – 001
Position: Lecturer
Area of specialization: Analytical & Industrial Chemistry
Academic/Work Experience
BSc (2003); MSc (2008); PhD (2012); Graduate assistant (2004); Assistant lecturer (2009); Lecturer (2012)



Research interest
Nanotechnology: Development of Delivery Systems for Agrochemicals, Nanosensors for detection of pesticide residues and environmental pollutants, Application of nanotechnologies in: energy production; biofuels, fuel cells, solar cells etc and water purification.
Industrial and Analytical Chemistry: Development of novel formulations for various industrial products, such as biopesticides, biofertilizers, paints, body care products, hair care products etc; incorporating locally available materials. Development of rapid and cheap analytical methods for quality control of industrial products

Research Publications

  1. Marikah David, Wanyika Harrison and Gatebe Erastus (2016). Novel Materials from Clay and Functionalized Clay Nanoparticles: Application in Remediation of Lead, Cadmium and Pentachlorophenol from Water. International Journal of Scientific & Engineering Research, Volume 7, Issue 10, 914 ISSN 2229-5518.
  2. Gatahi Dennis Maina, Wanyika Harrison Njuma, Kihurani Agnes Wanjiru and Odingo Dezzline Adhiambo (2016). Synthesis of Nylon-ferrous Oxide Chitosan Immobilised Silica Nanoprobe for Detection of Ralstonia solanacearum. Journal of Agriculture and Ecology Research International 7(4): 1-17, Article no.JAERI.23845 ISSN: 2394-1073
  3. Dennis Maina Gatahi, Harrison Njuma Wanyika, Agnes Mumo Kavoo, Agnes Wanjiru Kihurani, Elijah Miinda Ateka (2016). Enhancement of bacterial wilt resistance and rhizosphere health in tomato using bionanocomposites. International Journal of Horticultural Science and Technology 3(2) 129-144.
  4. Harrison Wanyika and Dennis Gatahi (2016). Patent: Bio-Antagonists Chitosan-Silica nanocomposites for the control of tomato bacterial wilt. Application made with KIPI.
  5. Esther Maina, Harrison Wanyika and Anthony Gacanja (2016). Natural Pyrethrum Extracts Photo-stabilized with Organo Clays. Journal of Scientific Research & Reports 9(7): 1-20,  Article no.JSRR.22433 ISSN: 2320-0227
  6. Gatahi Dennis Maina, Wanyika Harrison, Gohole Linnet, Evans Ligare Chimoita (2015). Influence of Plant Metabolites on Flea Beetle Infestation in Spider Plant Morphotypes. Universal Journal of Plant Sciences3(3):49-57
  7. Harrison Wanyika (2014). Controlled Release of Agrochemicals Intercalated into Montmorillonite Interlayer Space. The Scientific World Journal Volume 2014, Article ID 656287, 9 pages http://dx.doi.org/10.1155/2014/656287
  8. Harrison Wanyika (2013). Sustained Release of Fungicide Metalaxyl by Mesoporous Silica Nanospheres. J. Nanopart Res. 15:1831. DOI 10.1007/s1 1051-013-1831-y.
  9. Harrison Wanyika, Erastus Gatebe, Paul Kioni, Zhiyong Tang and Yan Gao. Mesoporous Silica Nanoparticles Carrier for Urea: Potential Applications in Agrochemical delivery systems. J. Nanosci. Nanotechnol. 12, 2221 – 2228 (2012).
  10. Harrison Wanyika, Erastus Gatebe, Paul Kioni, Zhiyong Tang and Yan Gao. Synthesis and characterization of ordered Mesoporous Silica Nanoparticles with tunable physical properties by varying molar composition of the reagents. Afr. J. Pharm. Pharmacol. 5(21): 2402-2410 (2011).
  11. Erastus Gatebe and Harrison Wanyika. Development of Nanostructured Smart Delivery Systems for Fertilizers and Pesticides. Nanotechnology: Present Status and Future Prospects in Developing Countries, Edited by Harish Padh, Benard O. Aduda and Ajith P. De Alwis. ISBN: 978-81-7035-707-0, Chapter 4 (2011).
  12. H. N. Wanyika, P G Kareru, L M Gitu, E. G. Gatebe and B. N. Muyemba. Quantification of Albendazole in Dewormer Formulations  in the Kenyan market. Adv. Appl. Sci. Res. 2(2): 9 – 13 (2011).
  13. H.N. Wanyika, P.G. Kareru,  J.M. Keriko, A.N. Gachanja, G.M. Kenji   and N.J Mukiira. Contact toxicity of some fixed plant oils and stabilized natural pyrethrum extracts against adult maize weevils (Sitophilus zeamais Motschulsky). Afr.  J.  Pharm. Pharmacol. 3(2): 066-069 (2009).
  14. H. N. Wanyika, A. N.   Gachanja, G. M. Kenji, J. M. Keriko   and A. N. Mwangi. A rapid method based on UV spectrophotometry for Quantitative determination of allicin in aqueous garlic extracts. JAGST 12 (1): 74 – 82 (2010).
  15. H. N. Wanyika,   E. G. Gatebe, L. M. Gitu, E. K. Ngumba and C. W. Maritim. Determination of caffeine content of tea and instant coffee brands found in the Kenyan market. Afr.  J.  Food   Sci. 4(6): 353 – 358 (2010).
  16. Innovation: Kareru P. G., Thiong’o G. T. & Wanyika H. (2005). ‘‘Angeles’’ Neem hand and Body Cream registered with Kenya Industrial Property institute (KIPI) by JKUAT for commercial exploitation.



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