title: Oxidative stability of fish oil supplemented with carnosic acid compared with synthetic antioxidants during long-term storage.
abstract: The effects of carnosic acid (CA) of different concentrations (0.1, 0.2, and 0.3mg/g) and synthetic antioxidants on oxidative stability in fish oil stored for 66days at different temperatures (30 and 4°C) were compared. The investigation focused on the increase in peroxide and conjugated diene values, as well as free fatty acid and thiobarbituric acid-reactive substances. The changes in trans fatty acid and aldehyde compound contents were investigated by Fourier transform infrared spectroscopy, while the changes in polyunsaturated fatty acid content were monitored by gas chromatography-mass spectrometry. The results show that the three CA concentrations were more effective in restraining fish oil oxidation, in which a dose-response relationship was observed. The antioxidant activity of CA was stronger than that of vitamin E, but still weaker than that of tertiary-butyl hydroquinone. Fish oil supplemented with 0.2mg/g CA exhibited favourable antioxidant effects and is preferable for effectively avoiding oxidation.
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China. Electronic address: ylwhnefu@126.com.
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China. Electronic address: zygorl@163.com.
authors.forename: Yuangang
authors.initials: Y
authors.lastname: Zu
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
authors.forename: Han
authors.initials: H
authors.lastname: Wang
authors.affiliation: Hohenheim University, Stuttgart 70599, Germany.
authors.forename: Shengzhuo
authors.initials: S
authors.lastname: Qu
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
keywords: Carnosic acid; Fish oil; Oxidative stability