1. Chemistry Department, School of Natural Science, Dambi Dollo University, P O Box 260 Dambi Dollo, Ethiopia
2. Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888 Adama, Ethiopia
3. Physics Department, Faculty of Science, University of Tabuk, Tabuk 47512, KSA
4. Research Centre, Department of Science, East-West Institute of Technology, Bangalore 560091, India
5. School of Applied Sciences, Papua New Guinea University of Technology, Lae, Morobe Province 411, Papua New Guinea
6. Department of Prosthodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical and Technical Science (SIMATS), Saveetha University, Chennai 600077, Tamil Nadu, India