1. Institute of Physics, Faculty of Physics and Astronomy, University of Zielona Góra, Szafrana 4a, 65-516 Zielona Góra, Poland
2. Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Novosibirsk 630090, Russia
3. Institute of Biophysics, Faculty of Medicine, University of Saarland, 66421 Homburg (Saar), Germany