John Ita Njagi

Research: - Developing a sensitive electrochemical microbiosensors to analyze nitric oxide in brain slices  

- Design an electrochemical  enzymatic sensor for dual detection of L-glutamate and nitric oxide

- The use of ceria and mixed ceria oxides based biosensors for dopamine evaluation in oxygen restrictive environments 

- Electrochemical quantification of serotonin in the embryonic zebrafish intestine

- Design an electrochemical  enzymatic sensor for dual detection of L-glutamate and nitric oxide

- Development of stable biosensors based on chemically synthetized Au-polypyrolle nanocomposite

Publications:

[9]  Electrochemical quantification of serotonin in the live embryonic zebrafish intestine

  J. Njagi, M. Ball, K.N. Wallace and S. Andreescu 

    Anal. Chem., 82(5), 2010, 1822-1830

 https://doi.org/10.1021/ac902465v

[8]  Amperometric detection of dopamine in vivo with an enzyme based carbon fiber microbiosensor 

   J. Njagi, M.M. Chernov, J.C. Leiter and S. Andreescu

    Anal. Chem., 82(3), 2010, 989-996

https://doi.org/10.1021/ac9022605

[7]  A sensitive electrochemical sensor based on chitosan and electropolymerized Meldola blue for monitoring NO in brain slices 

   J. Njagi, J.S. Erlichman, J.W. Aston, J.C. Leiter, and S. Andreescu

    Sens. Actuators B Chem., 143(2), 2010, 673-680

https://doi.org/10.1016/j.snb.2009.10.029

[6]  Applications of advanced nanomaterials for environmental monitoring 

  S. Andreescu, J. Njagi, C. Ispas, and M. Ravalli

    J. Environ. Monit., 11, 2009, 27-40. (Critical review)

https://doi.org/10.1039/B811063H 

(JEM Spotlight article, Top 10 most accessed articles in 2009 and 2010) 

[5]  Chapter VII - Nanostructured materials for enzyme immobilization and biosensors

S. Andreescu, J. Njagi, and C. Ispas 

in: The New Frontiers of Organic and Composite Nanotechnology,  (Eds. V. Erokin, M. K. Ram and O. Yavuz), Elsevier, 2008, 355-394 

https://doi.org/10.1016/B978-008045052-0.50009-9

[4]  Mixed Ceria Based Metal Oxides Biosensor for Operation in Oxygen Restrictive Environments 

  J. Njagi, C. Ispas, and S. Andreescu

    Anal. Chem., 80(19), 2008, 7266-7274

   https://doi.org/10.1021/ac800808a 

[3]  Electrochemical Studies of ceria as electrode material for sensing and biosensing applications 

  C. Ispas, J. Njagi, and S. Andreescu

    J. Electrochem. Soc., 155(8), 2008, F169-F176

https://doi.org/10.1149/1.2936178 

[2]  Stable enzyme biosensors based on chemically synthesized Au-polypyrrole nanocomposite 

  J. Njagi, and S. Andreescu

    Biosens. Bioelectron., 23(2), 2007, 768-775

https://doi.org/10.1016/j.bios.2007.03.028 

[1]  A Bioanalytical Chemistry Experiment for Undergraduate Students: Biosensors Based on Metal Nanoparticles 

  J. Njagi, J. Warner, and S. Andreescu

    J. Chem. Educ.,  84(7), 2007, 1180-1182

  https://doi.org/10.1021/ed084p1180