title: Development of a phenol-enriched olive oil with both its own phenolic compounds and complementary phenols from thyme.
abstract: Besides affecting the oil's sensorial characteristics, the presence of herbs and spices has an impact on the nutritional value of the flavored oils. The aim of the study was to develop a new product based on the phenol-enrichment of a virgin olive oil with both its own phenolic compounds (secoiridoid derivatives) plus additional complementary phenols from thyme (flavonoids). We studied the effect of the addition of phenolic extracts (olive cake and thyme) on phenolic composition, oxidative stability, antioxidant activity, and bitter sensory attribute of olive oils. Results showed that flavonoids from thyme appeared to have higher transference ratios (average 89.7%) from the phenolic extract to oil, whereas secoiridoids from olive presented lower transference ratios (average 35.3%). The bitter sensory attribute of the phenol-enriched oils diminished with an increase of the concentration of phenols from thyme, which might denote an improvement in the consumer acceptance.
authors.affiliation: Department of Food Technology, XaRTA-UTPV, Escola Tècnica Superior d'Enginyeria Agrària, Universitat de Lleida, Avda/Alcalde Rovira Roure 191, 25198 Lleida, Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Rubió
authors.forename: Maria-José
authors.initials: MJ
authors.lastname: Motilva
authors.forename: Alba
authors.initials: A
authors.lastname: Macià
authors.forename: Tomás
authors.initials: T
authors.lastname: Ramo
authors.forename: Maria-Paz
authors.initials: MP
authors.lastname: Romero
mesh_terms: D000975:Antioxidants / Q000032:analysis; D004355:Drug Stability; D005419:Flavonoids / Q000032:analysis; D005527:Food, Fortified / Q000032:analysis*; D006801:Humans; D039823:Iridoids / Q000032:analysis; D000069463:Olive Oil; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis* / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D013649:Taste; D046930:Thymus Plant / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D039823:Iridoids; D000069463:Olive Oil; D010636:Phenols; D010938:Plant Oils