Journal
FOOD RESEARCH INTERNATIONAL
Volume 51, Issue 1, Pages 132-140Publisher
ELSEVIER
DOI: 10.1016/j.foodres.2012.11.032
Keywords
Linseed oil; Olive oil; Antioxidant; Multiple emulsion; Lipid oxidation; Lemon balm
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Funding
- Programa Consolider-Ingenio CARNISENUSA CSD [2007-00016]
- Plan Investigador de la Universidad de Navarra (PIUNA)
- Grupo Santander-Universidad de Navarra
- Catedra Tomas Pascual Sanz-Universidad de Navarra
- Asociacion de Amigos de la Universidad de Navarra
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The effect of storage temperature (65 degrees C, 48 h) on the oxidative stability of a food-grade water-in-oil-in-water (W/O/W) emulsion was studied by comparison with an oil-in-water (O/W) emulsion. The emulsions were prepared with linseed oil or olive oil, and in each case, two antioxidants were evaluated, an aqueous Melissa lyophilized extract and BHA. Emulsions were characterized using bright field light microscopy and the oxidation was monitored by measuring the lipid hydroperoxides, thiobarbituric acid reactive substances (TBARS), conjugated dienes (CD) and trienes (CT), alpha-tocopherol and Lipophilic Oxygen Radical Absorbance Capacity (L-ORACFL) Assay. A great stability of olive oil emulsions was observed, without noticing differences between antioxidants or type of emulsion. This behavior was not observed in linseed oil emulsions. In this case the lipophilic antioxidant (BHA) seemed to be more efficient delaying the lipid oxidation in W/O/W emulsions than the water Melissa extract while the opposite occurs in the O/W emulsion. The type of antioxidant is a key factor in controlling oxidation in W/O/W and O/W emulsions which are prepared with highly polyunsaturated oils, but not in the case of highly monounsaturated ones. (C) 2012 Elsevier Ltd. All rights reserved.
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