About: Qualitative determination of β-acids and their transformation products in beer and hop using HR/AM-LC-MS/MS

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://pubs.acs.org/doi/abs/10.1021/jf501852r
Description	Hops represent an important source of β-acids with antimicrobial and sensory properties. Transformation products of β-acids formed during their oxidation, mainly hulupones, have been shown to have an interesting kind of bitterness. Their structures were recently elucidated using LC-TOFMS and 1D/2D NMR in solution after thermal treatment of the hop β-acids. This study demonstrates the advantages of MS detection with high resolution and accurate mass measurements. The structure of transformation products in an experimental solution of oxidized β-acids was elucidated using a newly developed method by hybrid quadrupole-Orbitrap MS. In addition to already known structures, two new ones were identified and named epoxycohulupone and epoxyhulupone. The method was verified on real samples; the profiles of these products in Sládek hops harvested in 2008 and 2012 and in corresponding beers were compared. For this purpose, a new QuEChERS assay was used for the preparation of beer samples. Hops represent an important source of β-acids with antimicrobial and sensory properties. Transformation products of β-acids formed during their oxidation, mainly hulupones, have been shown to have an interesting kind of bitterness. Their structures were recently elucidated using LC-TOFMS and 1D/2D NMR in solution after thermal treatment of the hop β-acids. This study demonstrates the advantages of MS detection with high resolution and accurate mass measurements. The structure of transformation products in an experimental solution of oxidized β-acids was elucidated using a newly developed method by hybrid quadrupole-Orbitrap MS. In addition to already known structures, two new ones were identified and named epoxycohulupone and epoxyhulupone. The method was verified on real samples; the profiles of these products in Sládek hops harvested in 2008 and 2012 and in corresponding beers were compared. For this purpose, a new QuEChERS assay was used for the preparation of beer samples. (en)
Title	Qualitative determination of β-acids and their transformation products in beer and hop using HR/AM-LC-MS/MS Qualitative determination of β-acids and their transformation products in beer and hop using HR/AM-LC-MS/MS (en)
skos:prefLabel	Qualitative determination of β-acids and their transformation products in beer and hop using HR/AM-LC-MS/MS Qualitative determination of β-acids and their transformation products in beer and hop using HR/AM-LC-MS/MS (en)
skos:notation	RIV/60193697:_____/14:#0000969!RIV15-MZE-60193697
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(QI91B227)
http://linked.open...iv/cisloPeriodika	31
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Dušek, Martin Jurková, Marie Olšovská, Jana Mikyška, Alexandr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Výzkumný ústav pivovarský a sladařský, a.s.
http://linked.open...dnocenehoVysledku	41009
http://linked.open...ai/riv/idVysledku	RIV/60193697:_____/14:#0000969
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	beer; β-acids; transformation products of β-acids; high-resolution mass spectrometry; QuEChERS; hops; hulupones (en)
http://linked.open.../riv/klicoveSlovo	β-acids beer QuEChERS hulupones high-resolution mass spectrometry hops transformation products of β-acids
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[60F3676FDB06]
http://linked.open...i/riv/nazevZdroje	Journal of Agricultural and Food Chemistry
http://linked.open...in/vavai/riv/obor	CB
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Significance of hop beta acids for Czech beers
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	62
http://linked.open...iv/tvurceVysledku	Olšovská, Jana Dušek, Martin Jurková, Marie Krofta, K. Mikyška, Alexandr
issn	0021-8561
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1021/jf501852r

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