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242 bytes added, 01:28, 29 June 2006
===Measuring Bitterness===
Hop bitterness is measured in ''International Bitterness Units''' or ''IBU's''. One IBU is one part per million of ''isohumulone'' which is a bittering (alpha) acid. IBU's can be estimated when brewing a beer by several different formulas, the most popular of which are the ''Tinseth'', ''Rager'' and ''Garetz'' formulas.
===Bittering Oils===