1. Genetic Engineering and Biotechnology Research Institute; University of Sadat City; El-Sadat City Egypt
2. Department of Chemical and Biomedical Engineering; Ohio State University; Columbus OH USA
3. Drug Radiation Research Department, Biotechnology Division, National Center for Radiation Research and Technology (NCRRT); Atomic Energy Authority; Nasr City Cairo Egypt
4. Department of Microbiology, Faculty of Science; Ain Shams University; Cairo Egypt