title: Effect of dietary supplementation of gallic acid and linoleic acid mixture or their synthetic salt on egg quality.
abstract: The effect of a dietary supplementation of gallic acid and linoleic acid mixture (MGL) and their synthetic salt, sodium 2,3-dihydroxy-5-(((9E,12E)-octadeca-9,12-dienyloxy)carbonyl)phenolate (NGL), on egg quality was investigated. A total of 120 laying hens were allotted into five groups over 4weeks of the experimental period. Birds were fed the following diets: (1) control [commercial diet (CD)], (2) 0.05% MGL (w/w, GA:LA=1:1, equal molar ratio), (3) 0.1% MGL, (4) 0.05% NGL, (5) 0.1% NGL. The performance of the hen, the anti-oxidative potential of egg albumen and yolk, and the fatty acid composition and cholesterol content of egg yolk were measured. The TBARS value of egg yolk from hens fed 0.1% MGL and 0.05% NGL was lower than that fed control diet after storage for 14days. The ABTS(+) reducing activity of egg albumen was significantly improved by MGL and NGL, but only NGL had an effect on yolk (p<0.05). The dietary supplementation of 0.05% or 0.1% MGL, and 0.05% NGL raised the PUFAs composition in egg yolk. The cholesterol content of egg yolk from hens fed control diet was higher than those fed 0.1% MGL, 0.05% or 0.1% NGL (p<0.05). In conclusion, a diet consisting of MGL and NGL can improve the antioxidative potential of egg and the fatty acid quality of egg yolk while lowering the cholesterol level.
authors.affiliation: Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Samooel
authors.initials: S
authors.lastname: Jung
authors.affiliation: Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Byung Hee
authors.initials: BH
authors.lastname: Han
authors.affiliation: Department of Animal Science and Technology, Sunchon National University, Suncheon 540-742, Republic of Korea.
authors.forename: Kichang
authors.initials: K
authors.lastname: Nam
authors.affiliation: Department of Agricultural Biotechnology, Major in Biomodulation Seoul National University, Seoul 151-921, Republic of Korea; Department of Animal Science, Iowa State University, Ames, IA 50011-3150, USA.
authors.forename: Dong U
authors.initials: DU
authors.lastname: Ahn
authors.affiliation: Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Jun Heon
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 305-764, Republic of Korea. Electronic address: cheorun@cnu.ac.kr.
authors.forename: Cheorun
authors.initials: C
authors.lastname: Jo
keywords: Antioxidative potential; Cholesterol; Egg; Gallic acid; Linoleic acid