1. Department of Chemistry, Division of Chemistry of Renewable Resources; University of Natural Resources and Life Sciences, Vienna; Konrad-Lorenz-Strasse 24 A-3430 Tulln Austria
2. Wyatt Technology Europe GmbH; Hochstrasse 12a 56307 Dernbach Germany
3. Institute of Chemistry and Technology of Macromolecular Materials; University of Pardubice; Studentska 573 Pardubice 532 10 Czech Republic
4. Department of Chemistry; University of Helsinki; A.I. Virtasen Aukio 1 00014 Helsinki Finland