1. Ecological Research Centre, Kiev-Mohyla Academy, National University of Ukraine, 2, Skovoroda St., 254070 Kiev, Ukraine
2. Institute of Colloid & Water Chemistry. National Academy of Sciences of Ukraine. Vernadskogo Pr., 42, 252680 Kiev-142. Ukraine
3. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic