1. Institute of Physics, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzow, Poland
2. Department of Physics and Biophysics, Institute of Biology, Warsaw University of Life Sciences — SGGW, Warszawa 02-787, Poland
3. Faculty of Biomedical Engineering, Silesian University of Technology, Gliwice 44-100, Poland
4. Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, Gliwice 44-100, Poland