Institution: | a Biophysical Laboratory, University of Bucharest, Faculty of Biology, Splaiul Independentei 91-95, Bucharest R-76201, Romania b Membrane Biophysics Group, Institute of Biological Sciences, Splaiul Independentei 296, P.O. Box 56-53, Bucharest R-79651, Romania c University of Bucharest, Faculty of Physics, Bucharest-Magurele, P.O. Box M.G.-6, Romania |