Nedyalka Georgieva*1, Zvezdelina Yaneva1 Chemistry Unit, Department of Pharmacology, Animal Physiology and Physiological Chemistry, Faculty of Veterinary Medicine, Trakia University, Students Campus, 6000 Stara Zagora, Bulgaria E-mail: nvgeorgieva@vmf.uni-sz.bg; z.yaneva@abv.bg *Corresponding author: Assoc. Prof. N. V. Georgieva PhD, Tel.: (+359) 42 699 642; Fax: (+359) 42 672 009; Е-mail: nvgeorgieva@vmf.uni-sz.bg   Abstract The urge for sustainable development of natural water […]