title: Effects of heat and ultraviolet radiation on the oxidative stability of pine nut oil supplemented with carnosic acid.
abstract: The effects of carnosic acid (CA) of different concentrations (0.05, 0.1, and 0.2 mg/g) and two common antioxidants (butylated hydroxytoluene and α-tocopherol) on oxidative stability in pine nut oil at different accelerated conditions (heating and ultraviolet radiation) 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 pinolenic acid content were monitored by gas chromatography-mass spectrometry. The results show that CA was more effective in restraining pine nut oil oxidation under heating, UV-A and UV-B radiation, in which a dose-response relationship was observed. The antioxidant activity of CA was stronger than that of α-tocopherol and butylated hydroxytoluene. Pine nut oil supplemented with 0.2 mg/g CA exhibited favorable antioxidant effects and is preferable for effectively avoiding oxidation.
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, 150040 Harbin, China.
authors: Han
authors: H
authors: Wang
authors: Ge
authors: G
authors: Zu
authors: Lei
authors: L
authors: Yang
authors: Yuan-gang
authors: YG
authors: Zu
authors: Hua
authors: H
authors: Wang
authors: Zhong-hua
authors: ZH
authors: Zhang
authors: Ying
authors: Y
authors: Zhang
authors: Lin
authors: L
authors: Zhang
authors: Hong-zheng
authors: HZ
authors: Wang
mesh_terms: D045784:Abietanes / Q000008:administration & dosage*; D000975:Antioxidants / Q000008:administration & dosage*; D004355:Drug Stability; D005503:Food Additives / Q000008:administration & dosage; D005519:Food Preservation / Q000379:methods; D006358:Hot Temperature; D010084:Oxidation-Reduction; D028223:Pinus / Q000737:chemistry*; D010936:Plant Extracts / Q000008:administration & dosage*; D010938:Plant Oils / Q000737:chemistry* / Q000528:radiation effects; D012639:Seeds / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D045784:Abietanes; D000975:Antioxidants; D005503:Food Additives; D010936:Plant Extracts; D010938:Plant Oils; C018381:salvin