1. Chemistry Department, Faculty of Science, Technology and Innovation, Mzuzu University, P/B 201, Luwinga, Mzuzu 2, Malawi
2. Biomedical Sciences Department, School of Life Sciences and Allied Health Professions, Kamuzu University of Health Sciences, P/B 360, Chichiri, Blantyre 3, Malawi
3. Basic Sciences Department, Faculty of Agriculture, Lilongwe University of Agriculture and Natural Resources, Lilongwe P.O. Box 219, Malawi
4. Physics and Biochemical Sciences Department, Faculty of Applied Sciences, Malawi University of Business and Applied Sciences, P/B 303, Chichiri, Blantyre 3, Malawi