1. Industrial Chemistry Department, Addis Ababa Science and Technology University, P.O. Box 1647, Addis Ababa1647, Ethiopia
2. Nanotechnology Center of Excellence, Addis Ababa Science and Technology University, P.O.Box 1647, Addis Ababa1647, Ethiopia
3. Biotechnology Department, Addis Ababa Science and Technology University, P.O.Box 1647, Addis Ababa1647, Ethiopia
4. Bioprocess and Biotechnology Center of Excellence, Addis Ababa Science and Technology University, P.O.Box 1647, Addis Ababa1647, Ethiopia