Secrets of beer foam revealed
Researchers have said that the secret to optimal foam in the head of a freshly poured brew is just the right amount and kind of barley lipid transfer protein No. 1, aka LTP1.
Cornell's Karl J. Siebert, principal investigator and author of "Recent Discoveries in Beer Foam, said bitter compounds found in hops, like iso-alpha acids, are important to brewers.
He said dissolved gases in the beer - carbon dioxide and, in some instances, nitrogen - play a role.
Siebert said so do acidity, some ions, ethanol levels, viscosity and numerous other factors that have been tried by brewers and scientifically tested," says Siebert, professor of food science and technology at the New York State Agricultural Experiment Station in Geneva, N.Y. "But LTP1 is the key to perfect beer foam."
Fascinating as foam is to chemists, it's of vital importance for the sensory experience of beer appreciation, insists Siebert, formerly a longtime research chemist in the industry, including at the former Stroh Brewery Co. in Detroit.
The study is set to be published in the Journal of the American Society of Brewing Chemists.
(Posted on 15-05-2014)
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