brewing

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brewing Preparation of beer and stout by using yeast as a catalyst in the alcoholic fermentation of liquors containing malt and hops. In beer brewing, a malt liquor (wort) is made from crushed, germinated barley grains. Hops are added to the boiling wort, both to impart a bitter flavour and also to help to clarify the beer and keep it free from spoilage by microbes. The clear, filtered wort is cooled and inoculated with brewer's yeast, which ferments part of the sugar from malt into alcohol.

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