PHYSICOCHEMICAL CHARACTERISTICS AND ANTIOXIDANT ACTIVITIES OF JAPANESE QUAIL (COTURNIX COTURNIX JAPONICA) EGG YOLK OIL (QEYO) EXTRACTED USING TWO DIFFERENT METHODS

摘要

In this study, the physico-chemical characteristics, mineral, phenolic contents and antioxidant activities of QEYO were evaluated. The oil was extracted using gentle heating (GH) and n-hexane (NH) methods, extracts were subjected to proximate, physicochemical and mineral analysis using atomic absorption spectrophotometry (AAS).Total phenolic contents (TPC) was quantified using Folin-Ciocalteau method; while the antioxidant activity were measured using the l,l-diphenyl-2 picryl hydrazyl (DPPH) - radical scavenging, ferric reducing antioxidant activity (FRAP) and total flavonoid contents. Physicochemical screening showed the presence of saponins, peroxides, ash, moisture and iodine, with little anthraquinones and cardiac glycosides. Sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), and phosphorus (P), were obtained in both fractions. Oil extracted by GH had the higher TPC and FRAP values (p < 0.05), while the NH fraction was higher in (TFC) (p < 0.05). QEYO showed antioxidant activities and can be used for the management of different diseases related to oxidative stress.