Polyphenol content in green, black and oolong tea (Camellia sinensis /L./ Kuntze) infusions in different times of tea maceration

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F03%3A00005429" target="_blank" >RIV/60460709:41210/03:00005429 - 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

Polyphenol content in green, black and oolong tea (Camellia sinensis /L./ Kuntze) infusions in different times of tea maceration

Original language description

Spectrophotometrically with Folin-Ciocalteau´s reagent total polyphenol content (TP) in tea infusions was estimated in six green tea sorts (Baimudan, Bancha, Biluochun, Cuiyacha, Gyokuro, Zhucha), six black tea sorts (Assam CTC, Ceylon "Adam's Peak", Ceylon "Tiger River", Darjeeling "Himalaya" TGFOP, Pu Er and Yunnan) and in the oolong tea Wulong. The selected sorts from the harvest represented different climate, height above the sea, the main regions of cultivation and different technologies of tea production. Polyphenol contents in the infusions were estimated after different times of elution in the range 1 - 60 min. Total polyphenol content increased with increasing time of elution statistically significantly with the exception of Assam CTC and Wulong tea. The increase of TP content in the first phase of maceration was very high (17.33 - 63.13 g.kg-1 tea in 1. min., 31.28 - 92.43 g.kg-1 tea in 5. min), at the end of the maceration it was already low (35.00 - 116.59 g.kg-1 tea in 30

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

GM - Food industry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2003

Confidentiality

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

Name of the periodical

Scientia Agriculturae Bohemica

ISSN

1211-3174

e-ISSN

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Volume of the periodical

34

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

7

Pages from-to

22-28

UT code for WoS article

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EID of the result in the Scopus database

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