title: Oil uptake by beef during pan frying: impact on fatty acid composition.
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.
authors.affiliation: INRA, UR370 Qualité des Produits Animaux, F-63122 Saint-Genès-Champanelle, France. sylvie.clerjon@clermont.inra.fr
authors.forename: S
authors.initials: S
authors.lastname: Clerjon
authors.forename: A
authors.initials: A
authors.lastname: Kondjoyan
authors.forename: J M
authors.initials: JM
authors.lastname: Bonny
authors.forename: S
authors.initials: S
authors.lastname: Portanguen
authors.forename: C
authors.initials: C
authors.lastname: Chevarin
authors.forename: A
authors.initials: A
authors.lastname: Thomas
authors.forename: D
authors.initials: D
authors.lastname: Bauchart
mesh_terms: D000327:Adsorption; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D002417:Cattle; D003296:Cooking / Q000379:methods*; D004058:Diffusion; D005227:Fatty Acids / Q000032:analysis*; D008043:Linseed Oil / Q000008:administration & dosage; D008279:Magnetic Resonance Imaging; D008460:Meat / Q000032:analysis*; D008956:Models, Chemical; D000069463:Olive Oil; D010936:Plant Extracts / Q000008:administration & dosage / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D059808:Polyphenols / Q000008:administration & dosage; D013499:Surface Properties; D014810:Vitamin E / Q000008:administration & dosage
chemical_list: D005227:Fatty Acids; D000069463:Olive Oil; D010936:Plant Extracts; D010938:Plant Oils; D059808:Polyphenols; D014810:Vitamin E; D008043:Linseed Oil