Chemical composition and thermal properties of Tunisian pecan nut [Carya illinoinensis (Wangenh.) K. Koch] oils. Composición química y propiedades térmicas de aceites de nuez de pecana [Carya illinoinensis (Wangenh.) K. Koch] tunecina

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Bouali, I. | Rattouli, H. | Herchi, W. | Martine, Lucy | Grégoire, Stéphane | Albouchi, A. | Martínez-Force, E. | Boukhchina, S | Berdeaux, Olivier

Edité par CCSD -

International audience. An investigation on fatty acid, triacylglycerol, tocopherol, and xanthophyll contents and thermal properties of pecan (Carya illinoinensis) kernel oils from two cultivars was carried out. The main fatty acids were oleic acid, followed by linoleic and palmitic acids. The predominant triacylglycerols were OOL, OOO, and OLL (where O stands for oleoyl and L for linoleoyl). Pecan kernel oil is a rich source of tocopherols, mainly γ-tocopherol. Two xanthophylls (lutein and zeaxanthin) were investigated, and lutein was found to be the major one. Thermal behavior was studied by differential scanning calorimetry (DSC). Pecan nut oil displayed melting and crystallization transitions at low-temperature zones. The difference between DSC parameter values provides a path for distinguishing among cultivars. These data promote pecan kernel oil as a potential source of bioactive compounds with nutraceutical properties (monounsaturated fatty acids, tocopherols, and xanthophylls) and reveal, for the first time, the thermal properties of Carya illinoinensis oil. . Se llevó a cabo una investigación sobre el contenido de ácidos grasos, triacilgliceroles, tocoferoles, xantofilas y propiedades térmicas de aceites de nuez de pecana (Carya illinoinensis) de dos cultivares. Los principales ácidos grasos fueron el ácido oleico seguido de los ácidos linoleico y palmítico. Los triacilgliceroles predominantes fueron OOL, OOO y OLL (donde O, oleoilo y L; linoleoilo). El aceite de nuez de pecana es una fuente rica en tocoferoles, principalmente γ-tocoferol. Se investigaron dos xantofilas (luteína y zeaxantina), la luteína fue la mayoritaria. Los comportamientos térmicos se estudiaron mediante calorimetría diferencial de barrido (DSC). El aceite de nuez de pacana mostró transiciones de fusión y cristalización en zonas de baja temperatura. La diferencia entre los valores de los parámetros de DSC proporciona un camino para distinguir entre cultivares. Estos datos presentan al aceite de nuez pecana como una fuente potencial de compuestos bioactivos con propiedades nutracéuticas (ácidos grasos monoinsaturados, tocoferoles y xantofilas) y revelan, por primera vez, las propiedades térmicas del aceite de Carya illinoinensis.

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