Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea
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, t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-07-01
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| Series: | Electronic Journal of Biotechnology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0717345817300325 |
| _version_ | 1818821967650750464 |
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| author | Jiajia Li Qiong Xiao Yufeng Huang Hui Ni Changzheng Wu Anfeng Xiao |
| author_facet | Jiajia Li Qiong Xiao Yufeng Huang Hui Ni Changzheng Wu Anfeng Xiao |
| author_sort | Jiajia Li |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-18T23:16:36Z |
| format | Article |
| id | doaj.art-c13d6b467db0400e92ea43895804a935 |
| institution | Directory Open Access Journal |
| issn | 0717-3458 |
| language | English |
| last_indexed | 2024-12-18T23:16:36Z |
| publishDate | 2017-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electronic Journal of Biotechnology |
| spelling | doaj.art-c13d6b467db0400e92ea43895804a9352022-12-21T20:48:08ZengElsevierElectronic Journal of Biotechnology0717-34582017-07-0128C879410.1016/j.ejbt.2017.05.010Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong teaJiajia Li0Qiong Xiao1Yufeng Huang2Hui Ni3Changzheng Wu4Anfeng Xiao5College of Food and Biological Engineering, Jimei University, Xiamen 361021, ChinaCollege of Food and Biological Engineering, Jimei University, Xiamen 361021, ChinaCollege of Food and Biological Engineering, Jimei University, Xiamen 361021, ChinaCollege of Food and Biological Engineering, Jimei University, Xiamen 361021, ChinaCollege of Food and Biological Engineering, Jimei University, Xiamen 361021, ChinaCollege of Food and Biological Engineering, Jimei University, Xiamen 361021, ChinaBackground: 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.http://www.sciencedirect.com/science/article/pii/S0717345817300325Antioxidant capacityAssessCatechinCatechinsInferior teaQuality improvementSecondary processingTannase-catalyzed hydrolysisTea infusionTea leaves |
| spellingShingle | Jiajia Li Qiong Xiao Yufeng Huang Hui Ni Changzheng Wu Anfeng Xiao Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea Electronic Journal of Biotechnology Antioxidant capacity Assess Catechin Catechins Inferior tea Quality improvement Secondary processing Tannase-catalyzed hydrolysis Tea infusion Tea leaves |
| title | Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea |
| title_full | Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea |
| title_fullStr | Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea |
| title_full_unstemmed | Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea |
| title_short | Tannase application in secondary enzymatic processing of inferior Tieguanyin oolong tea |
| title_sort | tannase application in secondary enzymatic processing of inferior tieguanyin oolong tea |
| topic | Antioxidant capacity Assess Catechin Catechins Inferior tea Quality improvement Secondary processing Tannase-catalyzed hydrolysis Tea infusion Tea leaves |
| url | http://www.sciencedirect.com/science/article/pii/S0717345817300325 |
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