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  • Title: Oil uptake by beef during pan frying: impact on fatty acid composition.
    Author: Clerjon S, Kondjoyan A, Bonny JM, Portanguen S, Chevarin C, Thomas A, Bauchart D.
    Journal: Meat Sci; 2012 May; 91(1):79-87. PubMed ID: 22265369.
    Abstract:
    Fat entering food during frying needs to be monitored to control the nutritional properties of the products: fat penetration and fatty acid (FA) composition. The large difference between the apparent diffusion coefficients of lipids and meat fibers allows the use of diffusion-weighted magnetic resonance imaging (DWI) to measure oil uptake profiles. This method, in association with analysis of FAs by gas-liquid chromatography, predicts nutritional changes. Beef samples from finishing cows given control feed or high FA supplemented feed were fried in olive oil at 130 °C and 180 °C. Frying oil penetration was quantified by computing oil signal profiles from 3D DWI. Oil penetration was deeper at 180 °C (5 mm) than at 130 °C (2.5 mm), consistent with oil penetration processes. Oil penetration evaluated with DWI was correlated (R²=0.82) with biochemical analysis of FA composition. These results highlight the predominance of oil uptake over animal feed effects in the first millimeters of in-plane fried meat.
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