1. Department of Radiation Microbiology, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Nasr City, Cairo, Egypt
2. Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
3. Department of Analysis and Evaluation, Egyptian Petroleum Research Institute (EPRI), Egypt
4. Department of Biochemistry, Faculty of Science, Cairo University, Giza, Egypt