Author(s):
1. Jaroslava Budinski-Simendic, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
2. Gordana Markovic, Tigar A.D., Pirot, Serbia
3. Jelena Tanasić, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
4. Milena Marinovic-Cincovic, University of Belgrade, Vinča Institute of Nuclear Sciences, Serbia, Serbia
5. Ayse Aroguz, Istanbul University, Engineering Faculty, Chemistry Department, Istanbul, Turkey, Turkey
6. Vesna Teofilovic, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
7. Ljiljana Korugic-Karasz,

Abstract