1. Department
of Applied Chemistry, University of South Bohemia, Branišovská
31, 370 05 České Budějovice, Czech Republic
2. Department
of Food Analysis and Nutrition, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic
3. Laboratory
of Molecular Structure Characterization, Institute of Microbiology,
v.v.i., Academy of Sciences of the Czech Republic, Vídeňská
1083, 142 20 Prague 4, Czech Republic