Allium Discoloration: Color Compounds Formed during Pinking of Onion and Leek

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F15%3A43900431" target="_blank" >RIV/60461373:22330/15:43900431 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12220/15:43889278 RIV/61388971:_____/15:00464135

Výsledek na webu

<a href="http://pubs.acs.org/doi/ipdf/10.1021/acs.jafc.5b04564" target="_blank" >http://pubs.acs.org/doi/ipdf/10.1021/acs.jafc.5b04564</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jafc5b04564" target="_blank" >10.1021/acs.jafc5b04564</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Allium Discoloration: Color Compounds Formed during Pinking of Onion and Leek

Popis výsledku v původním jazyce

Structures and formation pathways of compounds responsible for pink discoloration of onion and leek were studied. A procedure was developed for the isolation and purification of the color compounds from various model systems and their identification by HPLC-DAD-MS/MS. In total, structures of 15 major color compounds were tentatively determined. It was found that the pigment is a complex mixture of highly conjugated species composed of two N-substituted 3,4-dimethylpyrrole-derived rings linked by eithera methine or a propenylidine bridge. These two-ring units are further modified by various C1- and C3-side chains. Experiments with isotope-labeled thiosulfinates revealed that the methine bridge and C1-side chains originate from the methyl group of methiin, whereas the C3 units are derived from the propenyl group of isoalliin.

Název v anglickém jazyce

Allium Discoloration: Color Compounds Formed during Pinking of Onion and Leek

Popis výsledku anglicky

Structures and formation pathways of compounds responsible for pink discoloration of onion and leek were studied. A procedure was developed for the isolation and purification of the color compounds from various model systems and their identification by HPLC-DAD-MS/MS. In total, structures of 15 major color compounds were tentatively determined. It was found that the pigment is a complex mixture of highly conjugated species composed of two N-substituted 3,4-dimethylpyrrole-derived rings linked by eithera methine or a propenylidine bridge. These two-ring units are further modified by various C1- and C3-side chains. Experiments with isotope-labeled thiosulfinates revealed that the methine bridge and C1-side chains originate from the methyl group of methiin, whereas the C3 units are derived from the propenyl group of isoalliin.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GM - Potravinářství

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Journal of Agricultural and Food Chemistry

ISSN

0021-8561

e-ISSN

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Svazek periodika

63

Číslo periodika v rámci svazku

46

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

10192-10199

Kód UT WoS článku

000366004800011

EID výsledku v databázi Scopus

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