Stanovení antioxidačních vlastností surového chmele a chmelových výrobků

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F14864347%3A_____%2F08%3A8P004768" target="_blank" >RIV/14864347:_____/08:8P004768 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of antioxidant properties of raw hop and hop products

Popis výsledku v původním jazyce

The reducing activity was determined using the techniques based on the methods already pub-lished by Chapon (photometric determination with dipyridyl-ferric complex), Kaneda (determi-nation with DPPH free radical) and Ushida (determination of the EPR-T150 value). The method according to Kaneda as well as the method according to Chapon is efficient for hop antioxidant properties determination; the method according to Chapon is less sensitive. Determination with DPPH was performed using photometric and EPR detections, results of both detection principles were in a good correlation. The reducing activity of methanol extracts of hops was higher than of hot water ones due to a different spectrum of extracted substances. Hot water extraction and re-ducing activity determination with DPPH were used for further study. Significant differences in reducing activities were proved among Czech hop varieties. Best results of reducing activity were found out for Saaz aroma hops. Small part of reducing

Název v anglickém jazyce

Evaluation of antioxidant properties of raw hop and hop products

Popis výsledku anglicky

The reducing activity was determined using the techniques based on the methods already pub-lished by Chapon (photometric determination with dipyridyl-ferric complex), Kaneda (determi-nation with DPPH free radical) and Ushida (determination of the EPR-T150 value). The method according to Kaneda as well as the method according to Chapon is efficient for hop antioxidant properties determination; the method according to Chapon is less sensitive. Determination with DPPH was performed using photometric and EPR detections, results of both detection principles were in a good correlation. The reducing activity of methanol extracts of hops was higher than of hot water ones due to a different spectrum of extracted substances. Hot water extraction and re-ducing activity determination with DPPH were used for further study. Significant differences in reducing activities were proved among Czech hop varieties. Best results of reducing activity were found out for Saaz aroma hops. Small part of reducing

Druh

C - Kapitola v odborné knize

CEP obor

GM - Potravinářství

OECD FORD obor

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Projekt

<a href="/cs/project/1B44061" target="_blank" >1B44061: Aplikace moderních metod stanovení antioxidační aktivity k hodnocení kvality chmele a senzorické stability piva</a><br>

Návaznosti

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

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Acta Horticulturae

ISBN

978-90-66057-30-2

Počet stran výsledku

4

Strana od-do

97-110

Počet stran knihy

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Název nakladatele

International Society of Horticultural Science

Místo vydání

Belgie

Kód UT WoS kapitoly

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