1. School of Chemical Sciences, Universiti Sains Malaysia, George Town, Malaysia
2. Faculty of Education Department of Science, Open University of Sudan, Khartoum, Sudan
3. Chemistry Department, Faculty of Science, University of Khartoum, Khartoum, Sudan
4. Water Quality Laboratory, National Water Research Institute of Malaysia (NAHRIM), Seri Kembangan, Malaysia
5. Integrative Medicine Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Kepala Batas, Malaysia