Phenolipids as antioxidants in emulsified systems

Ann-Dorit Moltke Sørensen, Christelle Bayrasy, Mickäel Laguerre, Jérôme Lecomte, Pierre Villenenve, Charlotte Jacobsen

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Abstract

Lipid oxidation is a major issue in foods containing LC PUFA and substantial efforts have been made to protect lipids against oxidation. Recent studies carried out with phenolipids (lipophilized phenolics) in emulsified systems have shown that increased lipophilicity did not necessarily lead to an increase of the antioxidative effect. When the phenolic compound reaches a certain point of lipophilicity its antioxidative effect decreases. Thus, the polar paradox hypothesis is not valid when the alkyl chain length is above a certain length. Futhermore, the length of the alkyl chain for optimal antioxidant effect has been shown to be influenced by the specific phenolic compound and the type of emulsion.
The overall aim for our work was to evaluate phenolipids with different lipophilicity as antioxidants in emulsified food. In the study presented here caffeic, ferulic and coumaric acid were selected along with their corresponding alkyl esters (C4-C20). The methods used to evaluate the antioxidative effect of the different phenolipids were the CAT assay (o/w emulsion), antioxidant assays (DPPH, Iron chelating and reducing power) and partitioning studies. Moreover, the results from the CAT assay on caffeates were compared to results (PV and volatiles) from a storage experiment with an o/w emulsion.
Original languageEnglish
Publication date2012
Number of pages1
Publication statusPublished - 2012
Event10th Euro Fed Lipid Congress - Cracow, Poland
Duration: 23 Sep 201226 Sep 2012
Conference number: 10

Conference

Conference10th Euro Fed Lipid Congress
Number10
CountryPoland
CityCracow
Period23/09/201226/09/2012

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