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Rebolleda Alonso, Sara Beltrán Calvo, Sagrario Sanz Díez, Mª Teresa González San José, Mª Luisa García Solaesa, Ángela 2017-02-14T12:26:02Z 2017-02-14T12:26:02Z 2013-12 http://hdl.handle.net/10259/4342 The supercritical fluid extraction (SFE) of wheat bran alkylresorcinols has been studied. Extractions were carried out at 40.0 MPa. The effect of particle size, static extraction pretreatment with supercritical CO2 (SC-CO2) and extraction temperature on the extraction kinetics was investigated. The extraction yield increased as the particle size decreased and with temperature. Extraction curves present a faster and linear initial extraction period followed by a slower extraction period. Based on these results the approximate mathematical model of Sovová was successfully applied to describe the extraction curves. The total content of alkylresorcinols was determined and compared with the alkylresorcinol content obtained by conventional organic solvent extraction. Due to the amphiphilic nature of these resorcinolic lipids, the extraction yield was higher for polar organic solvents than for SC-CO2. Characterization of supercritical extracts was also performed by determining the fatty acid composition and antioxidant activity. GALANG project (Ref.: ITC-20113029) financed by the Spanish Government through CDTI application/pdf eng Elsevier Journal of Food Engineering. 2013, V. 119, n. 4, p. 814–821 http://dx.doi.org/10.1016/j.jfoodeng.2013.07.008 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Supercritical fluid extraction Wheat bran Alkylresorcinols Sovová’s model Food Chemical engineering Alimentos Ingeniería química Extraction of alkylresorcinols from wheat bran with supercritical CO2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion