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| rdf:type
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| rdfs:seeAlso
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| 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 storage conditions. The smallest changes were found for anthocyanogens (loss of 5–20%). Depending on the variety, the depletion of fast reductones (DPPH-ARA1) and antiradical potential (DPPH-ARP) were 11-35% and 9–25% resp. after 12 months. Insignificant losses of up to 10% were determined for hops stored under anaerobic conditions. From the viewpoint of the antiradical activity and polyphenol changes, Saaz was the most stable variety.
- 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 storage conditions. The smallest changes were found for anthocyanogens (loss of 5–20%). Depending on the variety, the depletion of fast reductones (DPPH-ARA1) and antiradical potential (DPPH-ARP) were 11-35% and 9–25% resp. after 12 months. Insignificant losses of up to 10% were determined for hops stored under anaerobic conditions. From the viewpoint of the antiradical activity and polyphenol changes, Saaz was the most stable variety. (en)
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| Title
| - Assessment of changes in hop resins and polyphenols during long-term storage
- Assessment of changes in hop resins and polyphenols during long-term storage (en)
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| skos:prefLabel
| - Assessment of changes in hop resins and polyphenols during long-term storage
- Assessment of changes in hop resins and polyphenols during long-term storage (en)
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| skos:notation
| - RIV/14864347:_____/12:#0000398!RIV13-MZE-14864347
|
| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
| |
| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
| |
| http://linked.open...titaPredkladatele
| |
| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/14864347:_____/12:#0000398
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - hop alpha and beta acids; antiradical activity; hop storage; hop varieties; polyphenols (en)
|
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Journal Institute of Brewing
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Krofta, Karel
- Mikyška, Alexandr
|
| issn
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| number of pages
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| http://bibframe.org/vocab/doi
| |
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