1. 1Faculty of Materials Science and Applied Chemistry, Riga Technical University, P.Valdena 3/7, Riga, LV 1048, Latvia
2. 4Department of Biotechnology, University of Rijeka, Trg braće Mažuranića 10, 51000 Rijeka, Croatia
3. 5Department of Chemistry, University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia