国立研究開発法人 国際農林水産業研究センター | JIRCAS

Antioxidant Potential of Green and Black Teas of Selected South India Cultivars

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Tea is one of the most popular global beverages. It is widely consumed as a health promoting beverage and its health benefits are mainly due to the presence of polyphenols such as catechins, theaflavins and thearubigins. The purpose of the present study is to evaluate the antioxidant potential of green tea (GT) and black tea (BT) extracts of eight different cultivars by radical scavenging activity (DPPH-RSA) and hydrophilic oxygen radical absorbance capacity (H-ORAC). The extracts of teas were also analyzed for total polyphenol (TP) content and catechins. H-ORAC [(μmol Trolox equivalent (TE)/g)] values ranged from 2730-5031 (GT), 1429-2766 (BT) and DPPH-RSA (μmol TE/g) ranged from 1098-1376 and 508-798, respectively. Comparing the same cultivar, GT showed higher antioxidant activities (H-ORAC and DPPH-RSA) than those of BT which is partially attributable to the increased TP and concentration of catechins. Correlation coefficients between parameters of antioxidant activities were TP/H-ORAC (GT: 0.647, BT: 0.79), TP/DPPH -RSA (0.744, 0.976) and DPPH-RSA/H-ORAC (0.686, 0.811) while those of BT exceeded those of GT. Extracts from all the cultivars showed good antioxidant potential. Antioxidant activities were mainly derived from catechins in GT and theaflavins in the case of BT.

刊行年月2012-01-01
作成者TAKANO-ISHIKAWA YukoWATANABE JunGOTO MasaoRAO Lingamallu Jagan MohanRAMALAKSHMI Kulathooran
著者キーワード

Antioxidant activity

DPPH radical scavenging activity

polyphenols

ORAC

公開者Japan International Research Center for Agricultural Sciences
データ作成日2012-01-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
46
1
開始ページ81
終了ページ87
DOI10.6090/jarq.46.81
権利Japan International Research Center for Agricultural Sciences
言語eng