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Brewers generally refer to this apparent attenuation when using the word without qualification, [5] although the measurement of real attenuation — the actual percentage of sugar consumed by the yeast — is an important indicator of yeast health and for producing certain styles of beer. A beer which does not attenuate to the expected level in ...
The beer foam stability depends amongst other on the presence of transition metal ions (Fe 2+, Co 2+, Ni 2+, Cu 2+...), macromolecules such as polysaccharides, proteins, and isohumulone compounds from hops in the beer. Foam stability is an important concern for the first perception of the beer by the consumer and is therefore the object of the ...
The difference between the SG of the wort before fermentation and the SG of the beer after fermentation gives an indication of how much sugar was converted to alcohol and CO 2 by the yeast. A basic formula [4] to calculate beer strength based on the difference between the original and final SG is: = ()
Hops are the key ingredient that turn beer into beer. If you want to be an expert, here's what you need to know.
Yeast produces two different sulphur compounds regardless of the strain of yeast (H2S, SO2), with the main concern being how concentrated and quick the production is. Optimal yeast selection has ale brewers choosing strands of yeast with low production of H2S overall, as the chemical gives the beer an unappealing smell akin to garlic or burnt ...
Just as the composition of the beer (proteins, hops, yeast residue, filtration) affects a beer's head, the amount of lacing is also closely controlled by the specific composition of the beer, and beer connoisseurs can tell much by the lacing, though strictly speaking beer quality is not readily apparent by the head or the lacing. [2]
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.
Free Beer is a beer brand collaboration between students of IT University of Copenhagen [1] and the artist collective Superflex initiated in 2004. The recipe of the beer is published under a Creative Commons license , granting others the right to freely use and distribute it.