Control of antioxidant beer activity by the mashing process

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193697%3A_____%2F12%3A%230000710" target="_blank" >RIV/60193697:_____/12:#0000710 - isvavai.cz</a>
Result on the web
<a href="http://onlinelibrary.wiley.com/doi/10.1002/jib.35/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/jib.35/abstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/jib.35" target="_blank" >10.1002/jib.35</a>

Result language
angličtina
Original language name
Control of antioxidant beer activity by the mashing process
Original language description
Beer is considered to be a good source of antioxidants. The composition and the quantity of the antioxidant compounds depend not only on the qualities of the raw materials, but also on the technology processes. Barley and malt represent the main source of antioxidant compounds in beer and the contribution of the hop antioxidants is lower. The influence of the mashing process on the antioxidant activity and polyphenol concentration is crucial. The antioxidant state of the sweet wort and the hopped wort are dependent on the technology processes and the raw materials used. The spontaneous sorption of polyphenols onto wort dregs and the polymerization of catechin and epicatechin lead to decreasing concentrations of individual polyphenols in the final beer.Two methods, based on electron spin resonance were used to determine antioxidant activity. These were the DPPH (2,2-diphenyl-1-picryl-hydrazyl) assay and the "lag time" assay using free radical spin-trapping agent PBN (N-tert-butyl-?-phe
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
CB - Analytical chemistry, separation
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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