Assessment of changes in hop resins and polyphenols during long-term storage

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F14864347%3A_____%2F12%3A%230000398" target="_blank" >RIV/14864347:_____/12:#0000398 - isvavai.cz</a>

Result on the web

<a href="http://onlinelibrary.wiley.com/doi/10.1002/jib.40/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/jib.40/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/jib.40" target="_blank" >10.1002/jib.40</a>

Result language

angličtina

Original language name

Assessment of changes in hop resins and polyphenols during long-term storage

Original language description

A twelve-month storage experiment with pellets T90 of four hop varieties showed different dynamics of hop ageing in relation to both the storage conditions and the variety. Negligible effects on the alpha and beta acids and the hop storage index (HSI) were detected during storage without air access at a temperature of +2 °C. Storage under anaerobic conditions at 20 °C resulted in a loss of 20?25% alpha acids after one year. The content of beta acids did not change significantly under the same storage conditions. Large decreases of alpha and beta acid contents by 64?88 % and 51?83 %, respectively, were found in hops stored in the access to air in the dark at a temperature of 20 °C. The rate of alpha and beta bitter acids decline accelerated markedly after 6 months of storage. Sládek was the least stable variety under all types of storage conditions. After 12 months, the content of total polyphenols and flavonoids considerably decreased by 30?40% and 20?30% resp. independently upon stora

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

GM - Food industry

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

2012

Confidentiality

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

Name of the periodical

Journal Institute of Brewing

ISSN

2050-0416

e-ISSN

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Volume of the periodical

118

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

269-279

UT code for WoS article

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EID of the result in the Scopus database

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