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Antioxidants 2014, 3(2), 212-228; doi:10.3390/antiox3020212
Article

Distribution and Antioxidant Efficiency of Resveratrol in Stripped Corn Oil Emulsions

1,* , 2
, 1
 and 2
Received: 17 January 2014; in revised form: 19 February 2014 / Accepted: 28 February 2014 / Published: 4 April 2014
(This article belongs to the Special Issue Antioxidants in Oils)
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Abstract: We investigated the effects of resveratrol (RES) on the oxidative stability of emulsions composed of stripped corn oil, acidic water and Tween 20 and determined its distribution in the intact emulsions by employing a well-established kinetic method. The distribution of RES is described by two partition constants, that between the oil-interfacial region, POI, and that between the aqueous and interfacial region, PWI. The partition constants, POI and PWI, are obtained in the intact emulsions from the variations of the observed rate constant, kobs, for the reaction between the hydrophobic 4-hexadecylbenzenediazonium ion and RES with the emulsifier volume fraction, ФI. The obtained POI and PWI values are quite high, PWI = 4374 and POI = 930, indicating that RES is primarily located in the interfacial region of the emulsions, %RESI > 90% at ФI = 0.005, increasing up to 99% at ФI = 0.04. The oxidative stability of the corn oil emulsions was determined by measuring the formation of conjugated dienes at a given time in the absence and in the presence of RES. The addition of RES did not improve their oxidative stability in spite that more than 90% of RES is located in the interfacial region of the emulsion, because of the very low radical scavenging activity of RES.
Keywords: resveratrol; corn oil-in-water emulsions; pseudophase model; antioxidant distribution; antioxidant activity resveratrol; corn oil-in-water emulsions; pseudophase model; antioxidant distribution; antioxidant activity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Losada-Barreiro, S.; Costa, M.; Bravo-Díaz, C.; Paiva-Martins, F. Distribution and Antioxidant Efficiency of Resveratrol in Stripped Corn Oil Emulsions. Antioxidants 2014, 3, 212-228.

AMA Style

Losada-Barreiro S, Costa M, Bravo-Díaz C, Paiva-Martins F. Distribution and Antioxidant Efficiency of Resveratrol in Stripped Corn Oil Emulsions. Antioxidants. 2014; 3(2):212-228.

Chicago/Turabian Style

Losada-Barreiro, Sonia; Costa, Marlene; Bravo-Díaz, Carlos; Paiva-Martins, Fátima. 2014. "Distribution and Antioxidant Efficiency of Resveratrol in Stripped Corn Oil Emulsions." Antioxidants 3, no. 2: 212-228.


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