quá trình lên men Fermentation

Professor: Wook-Jin Chung Fermentation  Lactic Acid Fermentation and Alcoholic Fermentation Nguyen Van Tuyen Contents What is “Fermentation” Fermentation pathways Fermentation product What is “Fermentation” Fermentation: + Anaerobic process + Energy can be released from glucose even though oxygen is not available + Occurs in yeast cells, bacteria and in the muscle cells of animals 2 Fermentation pathways 2.1 Alcoholic fermentation + Carried out by yeasts in which sugars are converted into cellular energy producing ethanol and carbon dioxide 2 Fermentation pathways 2.2 Lactic acid fermentation + Glucose and other six-carbon sugars are converted into cellular energy and the metabolite lactate + occurs in some bacteria and animal cells, such as muscle cells Fermentation pathways Homolactic fermentation + The pyruvate undergoes a redox reaction, forming lactic acid + Not produce a gas as a byproduct C6H12O6 → CH3CHOHCOOH +2 ATP Fermentation pathways Homolactic fermentation Build up of lactic acid - When muscles need energy faster than the blood can supply oxygen - Also occurs in some kinds of bacteria (such as lactobacilli) and some fungi Fermentation pathways Heterolactic fermentation + Some lactate is further metabolized and results in ethanol and carbon dioxide acetate, or other metabolic products + several designations, such as pentose phosphate pathway, pentose phosphoketolase pathway, hexose monophosphate pathway, 6-phosphogluconase pathway C6H12O6 → CH3CHOHCOOH + C2H5OH + CO2 +ATP Fermentation product Food product: from milk (yogurt, kefir, fresh, and ripened cheese), fruits (wine, vinegar), vegetables (pickles, soy sauce), meat (femented sausage, salami) Industrial chemical: (solvent: acetone, butanol, ethanol, enzyme, pharmaceuticals) amino acid , vitamin, Thank You! http://blogcongdong.com ...Contents What is Fermentation Fermentation pathways Fermentation product What is Fermentation Fermentation: + Anaerobic process + Energy can be released... of animals 2 Fermentation pathways 2.1 Alcoholic fermentation + Carried out by yeasts in which sugars are converted into cellular energy producing ethanol and carbon dioxide 2 Fermentation pathways... Homolactic fermentation + The pyruvate undergoes a redox reaction, forming lactic acid + Not produce a gas as a byproduct C6H12O6 → CH3CHOHCOOH +2 ATP Fermentation pathways Homolactic fermentation