Institution: | 1. Physics Department, Faculty of Arts and Sciences , Ondokuz Mayis University , Samsun, Turkey fkoksal@omu.edu.tr;3. Chemistry Department, Faculty of Arts and Sciences , Ondokuz Mayis University , Samsun, Turkey;4. Physics Department, Faculty of Arts and Sciences , Ondokuz Mayis University , Samsun, Turkey;5. Halil Bayraktar Health Services Vocational College, Erciyes University , Kayseri, Turkey |