1. a Department of Food Preservation and Meat Technology , Faculty of Food and Biochemical Technology, Institute of Chemical Technology , Prague, Technická 5, 166 28 Prague 6 – Dejvice, Czech Republic
2. b Department of Environmental Studies , Institute for Wetland and Water Research, Faculty of Science, Mathematics and Computing Science , Radboud University Nijmegen , P.O. Box 9010, NL-6500 GL, Nijmegen, The Netherlands