Synthesis of Acyl Arbutin by an Immobilized Lipase and Its Suppressive Ability against Lipid Oxidation in a Bulk System and O/W Emulsion

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概要

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• Acyl arbutin was synthesized through the condensation of arbutin with a saturated fatty acid (C6-18) by the immobilized lipase in a batch reaction. The conversion at 10 and 20 g/l-solvent of immobilized lipase reached 45% over 2 d, but the initial reaction rate per amount of immobilized lipase decreased at 20 g/l-solvent. The radical scavenging activity of acyl arbutin in an ethanol solution was independent of the acyl chain length, although the rate constant, k, estimated for the oxidation of methyl linoleate in a bulk system with acyl arbutin by using the Weibull equation, decreased as the acyl chain length increased. This indicates the antioxidative ability of acyl arbutin with a long acyl chain to be due to its lipophilicity. Furthermore, it is suggested that dodecanoyl arbutin mainly acted on the interface between the oil and water phases in an O/W emulsion, and effectively suppressed the oxidation induced at the interface.

• 社団法人 日本農芸化学会の論文
• 2009-11-23

著者

• WATANABE Yoshiyuki

  Department of Epidemiology for Community Health and Medicine, Kyoto Prefectural University of Medici

• NOMURA Masato

  Department of Biotechnology and Chemistry,School of Engineering,Kinki University

• Nomura Masato

  Department Of Biotechnology And Chemistry School Of Engineering Kinki University

• NAGAI Mizuka

  Department of Biotechnology and Chemistry, School of Engineering, Kinki University

• Watanabe Yoshiyuki

  Department Of Biotechnology And Chemistry School Of Engineering Kinki University

• Nomura Masato

  Dep. Of Biotechnology And Chemistry School Of Engineering Kinki Univ.

• Nagai Mizuka

  Department Of Biotechnology And Chemistry School Of Engineering Kinki University

• Watanabe Yoshiyuki

  Dep. Of Biotechnology And Chemistry School Of Engineering Kinki Univ.

• Nomura Masato

  Department Of Biotechnology And Chemistry Faculty Of Engineering Kinki University

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