KFU. Card publication. Electrogenerated bromine as a coulometric reagent for the estimation of the bioavailability of polyphenols

KAZAN
FEDERAL UNIVERSITY

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ELECTROGENERATED BROMINE AS A COULOMETRIC REAGENT FOR THE ESTIMATION OF THE BIOAVAILABILITY OF POLYPHENOLS

Form of presentation

Articles in Russian journals and collections

Year of publication

2011

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Ziyatdinova Guzel Kamilevna, author

Authors, postgraduates KFU

Nizamova Alfiya Maratovna, postgraduate kfu

Bibliographic description in the original language

Nizamova, A.M. Electrogenerated bromine as a coulometric reagent for the estimation of the bioavailability of polyphenols / A.M. Nizamova, G.K Ziyatdinova, G.K Budnikov // J. Anal. Chem. - 2011. - V. 66. - No. 3. - P. 301-309.

Annotation

A method is proposed for the estimation of the bioavailability of polyphenols using electrogenerated bromine as a coulometric titrant. The titration of model solutions of casein and bovine serum albumin (BSA) shows that casein does not interact with electrogenerated bromine, while BSA reacts with the titrant in the ratio 1 : 63. The proteins bind rutin and quercetin (from 14 to 90%) at a high rate and thus reduce the bioavailability of polyphenols. The concentration of free polyphenol is reduced with an increase in the concentration of protein in the mixture. The total antioxidant capacity (AOC) of tea is determined. Green tea is shown to possess higher AOC than the black one because of the partial oxidation of polyphenols to respective thearubigins and theaflavins at the fermentation step in the production of green tea. The total AOC of tea drops from 7 to 85%, in proportion to the increase in the amount of milk in the mixture. Milk proteins bind tea polyphenols into complexes.

Keywords

Polyphenols, bromine, bioavailability

The name of the journal

J ANALCHEM+

URL

http://link.springer.com/article/10.1134%2FS1061934811010114

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=66659&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Budnikov German Konstantinovich	ru_RU
dc.contributor.author	Ziyatdinova Guzel Kamilevna	ru_RU
dc.contributor.author	Nizamova Alfiya Maratovna	ru_RU
dc.date.accessioned	2011-01-01T00:00:00Z	ru_RU
dc.date.available	2011-01-01T00:00:00Z	ru_RU
dc.date.issued	2011	ru_RU
dc.identifier.citation	Nizamova, A.M. Electrogenerated bromine as a coulometric reagent for the estimation of the bioavailability of polyphenols / A.M. Nizamova, G.K Ziyatdinova, G.K Budnikov // J. Anal. Chem. - 2011. - V. 66. - No. 3. - P. 301-309.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=66659&p_lang=2	ru_RU
dc.description.abstract	J ANALCHEM+	ru_RU
dc.description.abstract	A method is proposed for the estimation of the bioavailability of polyphenols using electrogenerated bromine as a coulometric titrant. The titration of model solutions of casein and bovine serum albumin (BSA) shows that casein does not interact with electrogenerated bromine, while BSA reacts with the titrant in the ratio 1 : 63. The proteins bind rutin and quercetin (from 14 to 90%) at a high rate and thus reduce the bioavailability of polyphenols. The concentration of free polyphenol is reduced with an increase in the concentration of protein in the mixture. The total antioxidant capacity (AOC) of tea is determined. Green tea is shown to possess higher AOC than the black one because of the partial oxidation of polyphenols to respective thearubigins and theaflavins at the fermentation step in the production of green tea. The total AOC of tea drops from 7 to 85%, in proportion to the increase in the amount of milk in the mixture. Milk proteins bind tea polyphenols into complexes.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Polyphenols	ru_RU
dc.subject	bromine	ru_RU
dc.subject	bioavailability	ru_RU
dc.title	Electrogenerated bromine as a coulometric reagent for the estimation of the bioavailability of polyphenols	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU