Stability of Catechin in Aqueous Solution with Coexistent Ascorbic Acid or Octanoyl Ascorbate and Organic Acid
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- WATANABE Yoshiyuki
- Department of Biotechnology and Chemistry, School of Engineering, Kinki University
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- IDENOUE Kana
- Department of Biotechnology and Chemistry, School of Engineering, Kinki University
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- NAGAI Mizuka
- Department of Biotechnology and Chemistry, School of Engineering, Kinki University
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- ADACHI Shuji
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University
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Abstract
The degradation kinetics of catechin in aqueous solution in the presence of L-ascorbic acid or octanoyl L-ascorbate, which was synthesized through the immobilized-lipase-catalyzed condensation of ascorbic and octanoic acids in acetonitrile, and of various organic acids were expressed by a first-order equation. The stability of catechin was reduced by the addition of ascorbic acid or octanoyl ascorbate at a concentration of 10 mmol/L, although the rate constant, k, for degradation in the presence of ascorbic acid or octanoyl ascorbate decreased with increasing citric acid concentration. Malic, lactic and sorbic acids were also effective for decelerating the oxidative degradation by ascorbic acid and octanoyl ascorbate, but their suppressive effects on the degradation of catechin differed between the solutions containing ascorbic acid and octanoyl ascorbate. This indicates that octanoyl ascorbate acts on catechin with a different mechanism from that of ascorbic acid.
Journal
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- Food Science and Technology Research
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Food Science and Technology Research 16 (2), 111-114, 2010
Japanese Society for Food Science and Technology
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Keywords
Details 詳細情報について
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- CRID
- 1390001204459237632
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- NII Article ID
- 10027496267
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- NII Book ID
- AA11320122
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- ISSN
- 18813984
- 13446606
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed