1. Department of Microbiology, Olabisi Onabanjo University, Ago-Iwoye, Nigeria
2. H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
3. Environmental and Biotechnology Unit, Department of Microbiology, University of Ibadan, Ibadan, Nigeria
4. Department of Chemistry, University of Ibadan, Ibadan, Nigeria