1. BioCentrum-DTU, Center for Advanced Food Studies, Technical University of Denmark, Building 224, DK-2800 Lyngby, Denmark, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, and Department of Environmental Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, SE-750 07 Uppsala, Sweden