1. Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
2. Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
3. Faculty of Science, J. E. Purkyně University, 400 96 Usti nad Labem, Czech Republic