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A 16th-century brewery Brewing is the production of beer by steeping a starch source (commonly cereal grains, the most popular of which is barley) in water and fermenting the resulting sweet liquid with yeast. It may be done in a brewery by a commercial brewer, at home by a homebrewer, or communally. Brewing has taken place since around the 6th millennium BC, and archaeological evidence ...
People choose to brew their own beer for a variety of reasons. Many homebrew to avoid a higher cost of buying commercially equivalent beverages. [10] Brewing domestically also affords one the freedom to adjust recipes according to one's own preference, create beverages that are unavailable on the open market or beverages that may contain fewer calories, or less or more alcohol.
Knowing the amount of extract in 100 grams (3.5 oz) of wort before fermentation and the number of grams of extract in 100 grams (3.5 oz) of beer at its completion, the amount alcohol (in grams) formed during the fermentation can be determined. The formula follows, attributed to Balling [1]: 427
Because of the closeness in temperatures of peak activity of an α-amylase (63-70 °C) and β-amylase (55-65 °C), the two rests are often performed at once with the time and temperature of the rest determining the ratio of fermentable to non-fermentable sugars in the wort and, hence, the final sweetness of the fermented drink.
BeerXML is a free, fully defined XML data description [3] standard designed for the exchange of beer brewing recipes [4] and other brewing data. Tables of recipes as well as other records such as hop schedules and malt bills can be represented using BeerXML for use by brewing software .
Many beer styles are classified as one of two main types, ales and lagers, though certain styles may not be easily sorted into either category.Beers classified as ales are typically made with yeasts that ferment at warmer temperatures, usually between 15.5 and 24 °C (60 and 75 °F), and form a layer of foam on the surface of the fermenting beer, thus they are called top-fermenting yeasts.
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Modern-day malt recipes generally consist of a large percentage of a light malt and, optionally, smaller percentages of more flavorful or highly colored types of malt. The former is called "base malt"; the latter is known as "specialty malts". The grain bill of a beer or whisky may vary widely