1. Faculty of Science, Department of Chemistry, Atatürk University ErzurumTurkey
2. Agri Ibrahim Cecen University, Central Researching Laboratory AgriTurkey
3. Universita degli Studi di Firenze, Polo Scientifico, Laboratorio di Chimica Bioinorganica, Via della Lastruccia, Sesto Fiorentino (Florence)Italy