1. Fibre
and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
2. Institute
of Polymer Materials, Department of Materials Science and Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
3. Deutsches Elektronen-Synchrotron, Notkestrasse 85, D-22607 Hamburg, Germany
4. Department
of Plant Breeding, The Swedish University of Agricultural Sciences, Box 104, SE-230 53 Alnarp, Sweden