Prooxidative Activities of Tea Catechins in the Presence of Cu2+
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- HAYAKAWA Fumiko
- School of Human Cultures, The University of Shiga Prefecture
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- ISHIZU Yoko
- School of Human Cultures, The University of Shiga Prefecture
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- HOSHINO Nobuo
- Department of Pharmacy, Shiga University of Medical Science
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- YAMAJI Akira
- Department of Pharmacy, Shiga University of Medical Science
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- ANDO Takashi
- Department of Chemistry, Shiga University of Medical Science
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- KIMURA Takahide
- Department of Chemistry, Shiga University of Medical Science
Bibliographic Information
- Other Title
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- Prooxidative Activities of Tea Catechins in the Presence of Cu〔2+〕
- Prooxidative Activities of Tea Catechins in the Presence of Cu<sup>2+</sup>
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Abstract
The ability of various tea catechins to generate H2O2 and the hydroxyl radical in the presence of the Cu2+ ion was investigated and compared with the effect of iron ions. The presence of Cu2+ accelerated the generation of H2O2 by EGC, while EGCg with Cu2+ generated a little H2O2. The presence of iron ions inhibited the generation of H2O2 by EGC. EGC and EC with Cu2+ generated the hydroxyl radical, while EGCg and ECg with Cu2+ did not. The fact that EGCg showed less prooxidative activity than EGC can be explained by the chelating ability of catechin gallates to metal ions under the experimental conditions.
Journal
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 68 (9), 1825-1830, 2004
Japan Society for Bioscience, Biotechnology, and Agrochemistry
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Details 詳細情報について
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- CRID
- 1390001206472981376
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- NII Article ID
- 130000030589
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- NII Book ID
- AA10824164
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- ISSN
- 13476947
- 09168451
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- NDL BIB ID
- 7100989
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- PubMed
- 15388955
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed
