The effect of hop beta acids oxidation products on beer bitterness

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193697%3A_____%2F13%3A%230000816" target="_blank" >RIV/60193697:_____/13:#0000816 - isvavai.cz</a>

Alternative codes found

RIV/14864347:_____/13:#0000514

Result on the web

<a href="http://kvasnyprumysl.cz/en/journal/2013/10-11" target="_blank" >http://kvasnyprumysl.cz/en/journal/2013/10-11</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The effect of hop beta acids oxidation products on beer bitterness

Original language description

Instability and tendency to oxidation depending on conditions is a dominant property of hop beta acids. This property has an impact on both the hop storage and the beer brewing process. Approximately one half of the amount decomposes in the air at room temperature in the course of one month. After 6 months the rate of degradation is more than 90%. The dynamics of the decomposition is much slower in leaf hops, primarily during the first 6 months of storage. Changes of beta acids during ageing explain whythe bittering potential of old hops does not decline proportionally to the alpha acid loss. A large share of degradation products are formed by cyclization of prenyl side chains of beta acids (tricyclolupulones and hydroxytricyclolupulones). Beers hopped by oxidation products of beta acids at the rate of 20g/hl showed distinct sensorial bitterness that was not unpleasant and clinging. The bittering potential of oxidation products of beta acids reaches approximately 35?40% of the bittern

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

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Project

<a href="/en/project/QI91B227" target="_blank" >QI91B227: Significance of hop beta acids for Czech beers</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Kvasný průmysl

ISSN

0023-5830

e-ISSN

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Volume of the periodical

59

Issue of the periodical within the volume

10-11

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

7

Pages from-to

306-312

UT code for WoS article

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EID of the result in the Scopus database

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