Lipid oxidation of fat blends modified by monoacylglycerol
2012
Spevackova, V., Vysoka Skola Chemicko-technologicka, Prague (Czech Republic). Ustav Mleka, Tuku a Kosmetiky | Hradkova, I., Vysoka Skola Chemicko-technologicka, Prague (Czech Republic). Ustav Mleka, Tuku a Kosmetiky | Smidrkal, J., Vysoka Skola Chemicko-technologicka, Prague (Czech Republic). Ustav Mleka, Tuku a Kosmetiky | Filip, V., Vysoka Skola Chemicko-technologicka, Prague (Czech Republic). Ustav Mleka, Tuku a Kosmetiky
Model dispersions of fat blends (FBs) with monoacylglycerols (MAG) of saturated fatty acids with different lengths of the acyl chain (MAG10-MAG18) and 1-octadecenoylglycerol, and without MAG (as blank) were prepared. We find out the influence of the addition of monoacylglycerol on oxidation of the fat dispersion. Trihexadecanoylglycerol (tripalmitoylglycerol - TAG48) was used as the dispersive phase, soybean oil was used as the dispersive medium. Primary (conjugated diens) and volatile secondary (by SPME in connection with GC-MS) lipid oxidation products and oil stability index (OSI) were measured during autoxidation of the fat blends in storage conditions. MAGs with a shorter (or the same) acyl chain length (MAG10-MAG16) than the acyl chain length of the structured fat (TAG48) arrange tightly on the interface oil/crystals of structured fat, thus prevent lipid oxidation.
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