1. Department of Chemical Engineering, KTH Royal Institute of Technology, Teknikringen 42, SE-100 44 Stockholm, Sweden
2. Nuclear Materials Authority, P.O. Box 530, 11381 El Maadi, Cairo, Egypt
3. Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, Box 7015, SE-75007 Uppsala, Sweden
4. AkzoNobel, Pulp and Performance Chemicals AB, Färjevägen 1, SE-445 80 Bohus, Sweden