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Investigation on the double cut-off phenomenon observed in protocatechuic acid and its alkyl esters under various CAT-based assays

Phonsatta Natthaporn, Grajeda-Iglesias Claudia, Figueroa-Espinoza Maria-Cruz, Baréa Bruno, Lecomte Jérôme, Visessanguan Wonnop, Durand Erwann, Villeneuve Pierre, Tapingkae Wanaporn, Panya Atikorn. 2020. Investigation on the double cut-off phenomenon observed in protocatechuic acid and its alkyl esters under various CAT-based assays. Journal of Agricultural and Food Chemistry, 68 (35) : pp. 9568-9575.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Abstract : A strange cutoff phenomenon of a series of protocatechuic acid alkyl esters had been noticed using the conjugated autoxidizable triene (CAT) assay. Two parabolic shapes of antioxidant activities of protocatechuic acid alkyl esters described as ″the double cutoff effect″ have been speculated as a result of an oxidative driving force generated in the aqueous phase. The aim of this research was to investigate the double cutoff effect using various types of oxidation driving forces in different CAT-based assays. To further explain the phenomenon, the natural oxidation of conjugated autoxidizable triene (NatCAT) assay has been developed for the first time by relying solely on only the lipid autoxidation of tung oil-in-water (O/W) emulsions. In conclusion, NatCAT exhibited different antioxidant and oxidation patterns from both CAT and apolar radical-initiated CAT assays, and only one cutoff point was obtained. This discovery would lead to a greater understanding of the complexity of antioxidant/lipid oxidation dynamics in O/W emulsion systems.

Mots-clés libres : Antioxidant, Lipids

Classification Agris : S01 - Human nutrition - General aspects

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

Auteurs et affiliations

  • Phonsatta Natthaporn, BIOTEC [National Center for Genetic Engineering and Biotechnology] (THA)
  • Grajeda-Iglesias Claudia, Université de Montpellier (FRA)
  • Figueroa-Espinoza Maria-Cruz, Université de Montpellier (FRA)
  • Baréa Bruno, CIRAD-PERSYST-UMR IATE (FRA)
  • Lecomte Jérôme, CIRAD-PERSYST-UMR IATE (FRA)
  • Visessanguan Wonnop, BIOTEC [National Center for Genetic Engineering and Biotechnology] (THA)
  • Durand Erwann, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0002-0306-8081
  • Villeneuve Pierre, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0003-1685-1494
  • Tapingkae Wanaporn, Chiang Mai University (THA)
  • Panya Atikorn, BIOTEC [National Center for Genetic Engineering and Biotechnology] (THA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/596428/)

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