1. Institute
of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic
2. Kompetenzzentrum Holz GmbH, Competence Centre for Wood Composites and Wood Chemistry (Wood K Plus), A-4040 Linz, Austria
3. Faculty
of Mathematics and Physics, Charles University, 180 00 Prague 8, Czech Republic