title: Content of carotenoids, tocopherols, sterols, triterpenic and aliphatic alcohols, and volatile compounds in six walnuts (Juglans regia L.) varieties.
abstract: The aim of this work was to study the content of tocopherols, sterols, triterpenic and aliphatic alcohols, carotenoids, and volatile compounds in the kernel oils from six walnut (Juglans regia L.) varieties. The levels of β-carotene ranged between 0.22 and 0.62 mg/kg, followed by lutein (0.01-0.06 mg/kg). The total content of tocopherol ranged from 186.5 to 436.2 mg/kg of the extracted oil and the major isoform in all samples was γ-tocopherol. The most abundant phytosterol was β-sitosterol (974-1494 mg/kg) followed by campesterol then Δ-5-avenasterol. The major triterpenic alcohol was cycloartenol (226.4-532.1 mg/kg). Hexacosanol (9.71-28.15 mg/kg) was the major aliphatic alcohol. The detected volatile compounds were pentanal, hexanal, nonanal, 2-decenal and hexanol. The statistical analysis showed significant differences between varieties, which are probably due to genetic factors.
authors.affiliation: Laboratoire de Biochimie des Lipides, Département de Biologie, Université de Tunis El Manar, 2092 Tunis, Tunisia. Electronic address: ikrambouabdallah@yahoo.fr.
authors.forename: Ikram Bou
authors.initials: IB
authors.lastname: Abdallah
authors.affiliation: Laboratoire de Biochimie des Lipides, Département de Biologie, Université de Tunis El Manar, 2092 Tunis, Tunisia.
authors.forename: Nizar
authors.initials: N
authors.lastname: Tlili
authors.affiliation: Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), 41012 Sevilla, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Martinez-Force
authors.affiliation: Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), 41012 Sevilla, Spain.
authors.forename: Ana Gracia Pérez
authors.initials: AG
authors.lastname: Rubio
authors.affiliation: Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), 41012 Sevilla, Spain.
authors.forename: Maria Carmen
authors.initials: MC
authors.lastname: Perez-Camino
authors.affiliation: Institut National de Recherches en Génie Rural, Eaux et Forêts (INRGREF), Tunis, Tunisia.
authors.forename: Ali
authors.initials: A
authors.lastname: Albouchi
authors.affiliation: Laboratoire de Biochimie des Lipides, Département de Biologie, Université de Tunis El Manar, 2092 Tunis, Tunisia.
authors.forename: Sadok
authors.initials: S
authors.lastname: Boukhchina
mesh_terms: D002338:Carotenoids / Q000032:analysis*; D031324:Juglans / Q000737:chemistry*; D013261:Sterols / Q000032:analysis*; D024505:Tocopherols / Q000032:analysis*; D014810:Vitamin E / Q000032:analysis; D055549:Volatile Organic Compounds / Q000032:analysis; D019207:beta Carotene / Q000032:analysis
chemical_list: D013261:Sterols; D055549:Volatile Organic Compounds; D019207:beta Carotene; D014810:Vitamin E; D002338:Carotenoids; D024505:Tocopherols
keywords: Carotenoids; Juglans regia L.; Phytosterol; Tocopherol; Triterpenic and aliphatic alcohols; Volatile compounds