1. Chemistry Department, Faculty of Science (boys), Al-Azhar University, Cairo, Egypt
2. Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, PR China
3. Petrochemical Department, Egyptian Petroleum Research Institute, Cairo, Egypt
4. Department of Chemistry, Turabah University College, Taif University, Taif, Saudi Arabia
5. Chemical Lab Sector, Qarun Petroleum Company, Cairo, Egypt