1. Department of Biochemistry, College of Veterinary Medicine University of Tikrit Tikrit Iraq
2. Department of Chemistry College of Education, University of Samara Samara Iraq
3. Chemistry department, Science College Imam Mohammad Ibn Saud Islamic University Riyadh Riyadh Saudi Arabia
4. Toxic and Narcotic drug, Forensic Medicine Department, Mansoura Laboratory, Medicolegal organization, Ministry of Justice Egypt