Process named after the French chemist Louis Pasteur (1822-1895) for killing microorganisms in liquids or foodstuffs that cause disease or spoilage. Pasteur was thus able to solve a major problem for winegrowers. The bottled wines were often not stable in the bottle. Post-fermentation occurred again and again or the wines acquired a vinegar or lactic acid tinge. Heating to high temperatures can kill yeasts, bacteria (e.g. lactic acid, acetic acid, listeria, salmonella) and moulds, thereby making the products sterile and preservable. However, certain microorganisms require higher temperatures.
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