1. Department of Physical Chemistry, Faculty of Science, P.J. Šafárik University, Košice, Slovak Republic
2. Institute of Materials Research, Slovak Academy of Science, Košice, Slovak Republic
3. University of Veterinary Medicine and Pharmacy in Košice, Department of Animal Nutrition, Dietetics and Animal Breeding, Košice, Slovak Republic
4. Department of Physical and Theoretical Chemistry, Faculty of Science, Comenius University, Mlynská dolina, Bratislava, Slovak Republic