Phenolic Metabolites of Karwinskia humboldtiana Leaves

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62157124%3A16370%2F12%3A43871329" target="_blank" >RIV/62157124:16370/12:43871329 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Phenolic Metabolites of Karwinskia humboldtiana Leaves

Original language description

Phenolic Metabolites of Karwinskia humboldtiana Leaves Methanolic extract from leaves of Karwinskia humboldtiana (Schuh.) Zucc. was subjected to fractionation with a pair of immiscible solvents and subsequently tested for antioxidant activity. Using DPPHthe order of scavenging activities of the extracts in comparison with standards of L-ascorbic acid and quercetin was as follows: ethyl acetate fraction } L-ascorbic acid } quercetin } butan-1-ol } light petrol } chloroform } water. The capability of scavenging OH radicals determined by EPR was as follows: ethyl acetate, chloroform } light petrol } butan-1-ol } water fractions. On the basis of availability and antioxidant activity of these fractions, isolation of constituents from butanol fractions wasachieved. Separation of this fraction led to the isolation of (+)-epicatechin and flavonol derivatives quercetin, quercetin 3-O-glucoside (isoquercitrin), quercetin-3-O-galactoside (hyperosid), quercetin-3-O-arabinoside, quercetin 3-O-rut

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

FR - Pharmacology and apothecary chemistry

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

Name of the periodical

Chemické listy

ISSN

0009-2770

e-ISSN

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Volume of the periodical

106

Issue of the periodical within the volume

12

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

4

Pages from-to

1143-1146

UT code for WoS article

000313406500010

EID of the result in the Scopus database

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