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Kvasinky jako součást mikrobioty osidlující potravinové suroviny a potraviny
 Ferbyová, Kateřina
In the literary research this thesis summarizes general information about the yeast genera, including cytology, morphology, and physiology of the cell. Yeasts are being classified within taxonomy. Some of the most important genera found and used in the food industry are characterized. Theses then describes both the cultural and contaminating microbiota of main food groups. Lastly, the paper describes some commercially used preservation techniques. The experimental part of this thesis is focused on assessing total microbial count (TMC) and yeast and mold count in two samples of spontaneously fermented beer as well as two samples of wine with different treatment. This is to capture the natural microbiota of these alcoholic beverages. In the case of yeast and mold count, samples were inoculated in chloramphenicol yeast glucose agar, in the case of TMC the plate count agar (PCA) was used. Found yeast was reinoculated in order to obtain a pure culture strain. Yeasts were identified using a CANDIDA-screen set (Erba-Lachema). C. glabrata, C. krusei, C. lipolytica and S. cerevisiae were found. Molds have been found on PCA. They were isolated and identified under microscope based on their morphological features. 3 Penicillium molds and 1 Aspergillus mold were identified.
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