1. Department of Physics, Ivanovo State University of Chemistry and Technology, Sheremetevskiy av. 7, Ivanovo 153000, Russia
2. Laboratory of Thermodynamics of Solutions of Non-electrolytes and Biologically Active Substances, G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya str. 1, Ivanovo 153045, Russia