HEBA A. EL-REFAI1*, MONA S. SHAFEI1, HANAN MOSTAFA 1, ABDEL-MONEM H. EL-REFAI1, EMAN M. ARABY2, FAWKIA M. EL-BEIH3, SAADIA M. EASA3 and SANAA K. GOMAA1 1 Chemistry of Natural and Microbial Products Department, National Research Center, Dokki, Cairo, Egypt 2 Microbiology Department, Egyptian Atomic Energy Authority, Cairo, Egypt 3 Microbiology Department, Faculty of Science...