1. Department of Petroleum and Gas Refining Engineering, College of Petroleum Processes Engineering, Tikrit University, Slah Al-deen, Iraq
2. Chemical Engineering Department, College of Engineering, Tikrit University, Iraq
3. Ministry of oil, North Refineries Company, Baiji Refinery, Slah Al-deen, Iraq
4. The State Company for Drugs industry and Medical Appliances, Slah Al-deen, Iraq
5. Mechanical Engineering, UIET, Panjab University, Chandigarh, India