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The Galloyl Catechins Contributing to Main Antioxidant Capacity of Tea Made from Camellia sinensis in China
Joint Authors
Zhao, Chunjian
Li, Chunying
Liu, Shuaihua
Yang, Lei
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-27
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
Total polyphenol content, catechins content, and antioxidant capacities of green, dark, oolong, and black teas made from Camellia sinensis in China were evaluated.
The total polyphenol content of 20 samples of tea was in the range of 7.82–32.36%.
Total catechins content was in the range of 4.34–24.27%.
The antioxidant capacity of tea extract was determined by the oxygen radical absorbance capacity (ORAC) test and the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging test.
Total polyphenol content, catechins content, and antioxidant capacity decreased in the following order: green > oolong > black > dark tea.
A positive correlation existed between the antioxidant capacity and total polyphenol content or catechins content ( R 2 = 0.67 – 0.87 ).
The antioxidant capacities of five major catechins (epigallocatechin gallate (EGCG), epicatechin gallate (ECG), epicatechin, epigallocatechin, and catechin) were determined by online HPLC DPPH radical-scavenging; the antioxidant activity of tea was mainly attributed to the esterified catechins (EGCG or ECG).
American Psychological Association (APA)
Zhao, Chunjian& Li, Chunying& Liu, Shuaihua& Yang, Lei. 2014. The Galloyl Catechins Contributing to Main Antioxidant Capacity of Tea Made from Camellia sinensis in China. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-1051397
Modern Language Association (MLA)
Zhao, Chunjian…[et al.]. The Galloyl Catechins Contributing to Main Antioxidant Capacity of Tea Made from Camellia sinensis in China. The Scientific World Journal No. 2014 (2014), pp.1-11.
https://search.emarefa.net/detail/BIM-1051397
American Medical Association (AMA)
Zhao, Chunjian& Li, Chunying& Liu, Shuaihua& Yang, Lei. The Galloyl Catechins Contributing to Main Antioxidant Capacity of Tea Made from Camellia sinensis in China. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-1051397
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051397