Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion
Abstract Octanoyl, dodecanoyl and hexadecanoyl ascorbates were synthesized by the condensation of ascorbic acid and the corresponding fatty acids in acetone using an immobilized lipase from Candida antarctica . The oxidation process of methyl linoleate (ML) as an oil droplet in the ML/W emulsion wit...
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crwiley:10.1007/s11746-010-1632-8 2024-09-15T17:46:41+00:00 Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion Watanabe, Yoshiyuki Nakanishi, Hirofumi Goto, Natsuki Otsuka, Kyosuke Kimura, Toru Adachi, Shuji 2010 http://dx.doi.org/10.1007/s11746-010-1632-8 https://onlinelibrary.wiley.com/doi/full/10.1007/s11746-010-1632-8 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of the American Oil Chemists' Society volume 87, issue 12, page 1475-1480 ISSN 0003-021X 1558-9331 journal-article 2010 crwiley https://doi.org/10.1007/s11746-010-1632-8 2024-08-06T04:18:47Z Abstract Octanoyl, dodecanoyl and hexadecanoyl ascorbates were synthesized by the condensation of ascorbic acid and the corresponding fatty acids in acetone using an immobilized lipase from Candida antarctica . The oxidation process of methyl linoleate (ML) as an oil droplet in the ML/W emulsion with ascorbic acid or acyl ascorbate was measured at 40 °C, and their antioxidative properties were examined. Hydrophilic proxidant, AAPH, or lipophilic proxidant, AMVN, was added to the water or oil phase to investigate the properties, and the kinetic parameters for the oxidation expressed by the Weibull equation were evaluated. It was suggested that most of the ascorbic acid molecules in the emulsion would be present in the water phase due to its high hydrophilicity and suppress the AAPH‐induced oxidation on the interface between the water and oil phases. Dodecanoyl and hexadecanoyl ascorbates would be dissolved in the oil phase and contribute to the suppression of the oxidation in the oil phase rather than on the interface. Octanoyl ascorbate with a HLB number of 11.8 would be in both phases. Regardless of the presence and type of the ascorbate, the rate constant, k , of the Weibull equation decreased as the pH of the water phase increased. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Journal of the American Oil Chemists' Society 87 12 1475 1480 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Octanoyl, dodecanoyl and hexadecanoyl ascorbates were synthesized by the condensation of ascorbic acid and the corresponding fatty acids in acetone using an immobilized lipase from Candida antarctica . The oxidation process of methyl linoleate (ML) as an oil droplet in the ML/W emulsion with ascorbic acid or acyl ascorbate was measured at 40 °C, and their antioxidative properties were examined. Hydrophilic proxidant, AAPH, or lipophilic proxidant, AMVN, was added to the water or oil phase to investigate the properties, and the kinetic parameters for the oxidation expressed by the Weibull equation were evaluated. It was suggested that most of the ascorbic acid molecules in the emulsion would be present in the water phase due to its high hydrophilicity and suppress the AAPH‐induced oxidation on the interface between the water and oil phases. Dodecanoyl and hexadecanoyl ascorbates would be dissolved in the oil phase and contribute to the suppression of the oxidation in the oil phase rather than on the interface. Octanoyl ascorbate with a HLB number of 11.8 would be in both phases. Regardless of the presence and type of the ascorbate, the rate constant, k , of the Weibull equation decreased as the pH of the water phase increased. |
format |
Article in Journal/Newspaper |
author |
Watanabe, Yoshiyuki Nakanishi, Hirofumi Goto, Natsuki Otsuka, Kyosuke Kimura, Toru Adachi, Shuji |
spellingShingle |
Watanabe, Yoshiyuki Nakanishi, Hirofumi Goto, Natsuki Otsuka, Kyosuke Kimura, Toru Adachi, Shuji Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion |
author_facet |
Watanabe, Yoshiyuki Nakanishi, Hirofumi Goto, Natsuki Otsuka, Kyosuke Kimura, Toru Adachi, Shuji |
author_sort |
Watanabe, Yoshiyuki |
title |
Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion |
title_short |
Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion |
title_full |
Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion |
title_fullStr |
Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion |
title_full_unstemmed |
Antioxidative Properties of Ascorbic Acid and Acyl Ascorbates in ML/W Emulsion |
title_sort |
antioxidative properties of ascorbic acid and acyl ascorbates in ml/w emulsion |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1007/s11746-010-1632-8 https://onlinelibrary.wiley.com/doi/full/10.1007/s11746-010-1632-8 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of the American Oil Chemists' Society volume 87, issue 12, page 1475-1480 ISSN 0003-021X 1558-9331 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1007/s11746-010-1632-8 |
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Journal of the American Oil Chemists' Society |
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87 |
container_issue |
12 |
container_start_page |
1475 |
op_container_end_page |
1480 |
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1810495016588541952 |