Proceedings Volume 2010 (format .pdf) - SimpBTH

This reaction takes place inside the organism during the carbohydrates metabolis.2. Thermal de-compositionUnder the action of high temperatures, the glycerol decomposes inacrolyne, a toxical product in high volume. This reaction takes place under hightreatments of the fatty foods.CH 2CHCH 2OHOHOHto- 2 H 2 OCH 2CHCH=OAcrolyne3. EsterificationThrough esterifaction, the glycerols transforms into glycerides, which arethe main fatty foods. This reaction takes place during the lipids metabolism, underthe action of the enzymes.CH 2OCORCH 2OHCH 2OCORCH 2OCORCHOHCHOCORCHOCORCHOCORCH 2 OHCH 2 OH CH 2 OH CH 2 OCOR1-monoacilglycerol 2-monoacilglycerol 1,2-diacilglycerol 1,2,3-triacilglycerolMATERIALS AND METHODSThe growing environment YPG (Yeast – Peptone – Glucose), whichcontains 1% yeast extract, 2% glucose, 2% peptone, sterilized for 15 minutes at120°C, M1/refference.Growing environment YPG (Yeast – Peptone – Glucose), which contains1% yeast extract, 2% glucose, 2% peptone, 2,5% glycerol, sterilized for 15minutes at 120°C, M2.Growing environment YPG (Yeast – Peptone – Glucose), which contains1% yeast extract, 2% glucose, 2% peptone, 5% glycerol, sterilized for 15 minutesat 120°C, M3.The research in this study were using three Saccharomyces bayanus (SB1,SB2, SB3) yeast strains which were isolated from the grapes types Iordana, WhiteFeteasca and Royal Feteasca from the Sebes-Apold vineyard.The fermentation of the yeast strains was monitored by the Startoriusfermenter equiped with sensors for: temperature, biomass, CO 2 , oxygen, during 10days at 22°C.159