‘FOAM-LOVING’ COMPLEX NITROGEN MATERIALS IN BEER
Open Access
- 10 September 1972
- journal article
- research article
- Published by Chartered Institute of Brewers and Distillers in Journal of the Institute of Brewing
- Vol. 78 (5) , 404-406
- https://doi.org/10.1002/j.2050-0416.1972.tb03469.x
Abstract
Complex nitrogen materials with affinity for foam have been separated from beer and characterized by isoelectrophoresis. They represent approximately one third by weight of the total beer complex-nitrogen fraction, they possess properties similar to those of proteins, and as a group they confer foam stability when added to beer media of low inherent stability. The remaining two thirds of the complex-nitrogen fraction, which shows properties atypical of proteins, also shows little affinity for foam. It is concluded that only complex-nitrogen species of high surface activity are very potent foam-stabilizing agents in beer.Keywords
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