Commodity Science and Ecology of Industrial Products, al. Niepodległości 10, 61-875
Poznań, Poland e-mail: marta. bieganska@ ue. poznan. pl 2. Poznan University of
Economics, Faculty of Commodity Science, Department of Natural Science and Quality
Assurance, al. Niepodległości 10, 61-875 Poznań, Poland* corresponding author