1. Department of Biophysics, Institute of Biotechnology and Environmental Sciences, University of Zielona Gora, Monte Cassino 21 B, 65-561 Zielona Gora, Poland, Institute of Molecular Physics, PAN, Smoluchowskiego 17, 60-179, Poland, and Faculty of Chemistry, University of Wrocław, 50-383 Wrocław, Poland