State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; College of Food Science & Technology, Nanchang University, Nanchang 330047, China.
State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; College of Food Science & Technology, Nanchang University, Nanchang 330047, China.
Food Chem. 2018 Jun 1;250:204-212. doi: 10.1016/j.foodchem.2018.01.030. Epub 2018 Jan 4.
This study aimed to explore the possibility of using methionine sulfone (Msn)-containing orbitides as indicators to evaluate the oxidation process of flaxseed oils. Results showed that after 4 days' heating, oxidation values slightly increased (p > .05) with significant decrease in methionine (Met)-containing peptides (p < .05) instead of γ-tocopherol (p > .05). However, as oxidation time continues increasing, oxidation values significantly increased (p < .05) with significant reduction of γ-tocopherol (p < .05). It demonstrated that Met-containing peptides were more readily oxidized compared with γ-tocopherol and showed certain antioxidant activity. Besides, high logarithmic correlations were found between oxidation values and Msn-containing orbitides (0.94-1.00), such as between total carbonyl compounds and orbitide [1-8-NαC],[1-MetO]-CLE (64.95 lnx - 52.14, R = 0.99, Dingya23 oil). Therefore, in comparison with common oxidation indices, Msn-containing orbitides may be better indicators for evaluating the oxidation process of flaxseed oil with superior separation efficiency, specific information and high stability.
本研究旨在探讨含甲硫氨酸砜（Msn）的轨道二氢吡啶作为评价亚麻籽油氧化过程的指标的可能性。结果表明，加热 4 天后，氧化值略有增加（p>.05），而含甲硫氨酸（Met）的肽（p<.05）而非γ-生育酚（p>.05）显著减少。然而，随着氧化时间的延长，氧化值显著增加（p<.05），γ-生育酚显著减少（p<.05）。这表明与γ-生育酚相比，含 Met 的肽更容易被氧化，并表现出一定的抗氧化活性。此外，氧化值与含 Msn 的轨道二氢吡啶之间存在高度的对数相关性（0.94-1.00），例如总羰基化合物与轨道二氢吡啶 [1-8-NαC],[1-MetO]-CLE（64.95 lnx-52.14，R=0.99，Dingya23 油）之间。因此，与常用的氧化指数相比，含 Msn 的轨道二氢吡啶可能是评价亚麻籽油氧化过程的更好指标，具有优异的分离效率、特定信息和高稳定性。
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