1. Department of Chemistry, College of Natural Sciences, Makerere University, Kampala, Uganda
2. Department of Chemistry, Faculty of Science and Education, Busitema University, Tororo, Uganda
3. Department of Pharmaceutical Sciences, University of Kwazulu-Natal, Durban, South Africa
4. School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
5. Department of Mechanical Engineering, Makerere University, Kampala, Uganda