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THE INFLUENCE OF ENVIRONMENTAL CONDITIONS ON THE PROPORTIONS OF COHUMULONE, ADHUMULONE AND HUMULONE IN HOP α ACIDS
Author(s) -
Hautke Přemysl,
Petříček Drahomír
Publication year - 1967
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1967.tb03018.x
Subject(s) - hop (telecommunications) , chemistry , food science , environmental science , computer science , telecommunications
Hops cultivated in the Hop Research Institute at Žatec have been examined to determine the influences of climatic conditions on the proportions of the three components of the α acids, viz. cohumulone, adhumulone and humulone. In Fuggle and Northern Brewer, grown in Czechoslovakia, cohumulone accounted for only 20% of the α acids, whereas the same varieties, grown in England, had values of 30%; similar differences were found with other hops. The influence of climate on the synthesis of α acids is important. A division of hop varieties into six groups has been made on the basis of (a) the ratio of α acids to β fraction, and (b) the percentage of cohumulone in the α acids.