The aim of this master thesis was to determine an influence of extract heterocyclic amines (HCA) from beef patties, grilled on a double-plate at five different temperatures 120 °C, 160 °C, 180 °C, 220 °C in 260 °C using the yeast Saccharomyces cerevisiae as a model organism. Beef patties were grilled to a core temperature 72 °C (group A) or a duration of a grilling was exactly 5 minutes (group B). Firstly, a presence of HCA in meat was analysed. Interestingly, a large quantity of PhIPs was detected in all beef patties, followed by MeIQx in very small concentrations. An effect of HCA extracts from the meat was investigated using yeast Saccharomyces cerevisiae on a cellular level. Yeast was incubated in PBS buffer at 28 °C at 220 rpm and than exposed for 2 hours to a solution of HCA extract at different concentrations. After 2-hour exposure we measured level of intracellular oxidation using 2',7' dichlorofluorescein and the content of reduced intracellular glutathione (GSH). Results showed that solutions of HCA extract from beef patties, treated under different conditions, do not induce an oxidative stress in Saccharomyces cerevisiae. Furthermore, HCA extracts had no effect on reduced intracellular glutathione content.
|