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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.
It is important, where any conversion to °P is involved, that the proper pair of temperatures be used for the conversion table or formula being employed. The current ASBC table is (20 °C/20 °C) meaning that the density is measured at 20 °C (68 °F) and referenced to the density of water at 20 °C (68 °F) (i.e. 0.998203 g/cm 3 or 0.0360624 ...
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]
Lambic in the early 19th century was a highly hopped beer, using 8–9 g/L of the locally grown 'Aalst' or 'Poperinge' varieties. [9] Modern lambic brewers, however, try to avoid making the beer extremely hop-forward and use aged, dry hops, which have lost much of their bitterness, aroma, and flavour. [10]
The bitterness of beer is measured according to the International Bitterness Units scale, with one IBU corresponding to one part-per-million of isohumulone. When beer is exposed to light, these compounds can decompose in a reaction catalyzed by riboflavin to generate free-radical species by the homolytic cleavage of the exocyclic carbon-carbon bond.