Application of a hop by-product in brewing: reduction in the level of haze-active prolamines and improved antioxidant properties of the beer

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F14%3A43896516" target="_blank" >RIV/60461373:22330/14:43896516 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/jib.126" target="_blank" >http://dx.doi.org/10.1002/jib.126</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/jib.126" target="_blank" >10.1002/jib.126</a>

Result language
angličtina
Original language name
Application of a hop by-product in brewing: reduction in the level of haze-active prolamines and improved antioxidant properties of the beer
Original language description
After supercritical CO2 extraction of hops or formation of lupulin-enriched pellets (type 45), polyphenol-rich by-products remain. These have some industrial and agricultural applications (preparation of polyphenol extracts and in the production of low-bitterness beers). In this work, both materials were used in pilot-scale brewing experiments for the production of beer enriched with polyphenols. Samples of beer made from these residues underwent analyses for haze-active prolamines, total polyphenols, phenolic monomers, antioxidant capacity, bitterness and colour. An almost identical decrease in the content (from hopped wort to final beer) of the prolamines of approximately 30% was detected in standard beer as well as in the beer prepared from the hopresidue (HR 1) after supercritical CO2 extraction. In contrast, the level of prolamines was reduced by more than 50% in the beer following addition of the hop residue (HR 2) after production of lupulin enriched pellets. Both hop materials
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EI - Biotechnology and bionics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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