Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea
Electron. j. biotechnol
;
28: 87-94, July. 2017. tab, graf
Article
in English
| LILACS
| ID: biblio-1015957
ABSTRACT
Background:
Inferior Tieguanyin oolong tea leaves were treated with tannase. The content and bioactivity of catechins in extracts from the treated tea leaves were investigated to assess the improvement in the quality of inferior Tieguanyin oolong tea.Results:
Analysis showed that after treatment, the esterified catechin content decreased by 23.5%, whereas non-galloylated catechin and gallic acid contents increased by 15.3% and 182%, respectively. The extracts from tannase-treated tea leaves showed reduced ability to bind to BSA and decreased tea cream levels. The extracts also exhibited increased antioxidant ability to scavenge OH and DPPH radicals, increased ferric reducing power, and decreased inhibitory effects on pancreatic α-amylase and lipase activities.Conclusions:
These results suggested that tannase treatment could improve the quality of inferior Tieguanyin oolong tea leaves.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tea
/
Carboxylic Ester Hydrolases
Language:
English
Journal:
Electron. j. biotechnol
Journal subject:
Biotechnology
Year:
2017
Type:
Article
/
Project document
Affiliation country:
China
Institution/Affiliation country:
Jimei University/CN
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