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Ale is a type of beer brewed from malted barley using a top-fermenting brewers' yeast. This yeast ferments the beer quickly, giving it a sweet, full bodied and fruity taste. Most ales contain hops, which impart a bitter herbal flavour that helps to balance the sweetness of the malt and preserve the beer. The other major style of beer is lager, which is bottom-fermented.
This category of beer uses yeast that ferments at the "top" of the fermentation vessel, and typically at higher temperatures than lager yeast (60°-75°F), which, as a result, makes for a quicker fermentation period (7-8 days, or even less). Ale yeast are known to produce by-products called esters, which are "flowery" and "fruity" aromas ranging, but not limited to apple, pear, pineapple, grass, hay, plum, and prune.
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