Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea.
Department of Food and Nutrition, Kangwon National University, Samcheok, Republic of Korea.
Food Chem. 2021 Jul 1;349:129082. doi: 10.1016/j.foodchem.2021.129082. Epub 2021 Jan 29.
Effects of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and moisture on the solubility of hydrophilic and lipophilic antioxidants were evaluated in medium-chain triacylglycerol (MCT) by 2,2-diphenyl-1-picrylhydrazyl (DPPH) reactivity. Next, we assessed the oxidative stability of antioxidant-containing corn oil depending on the presence of DOPC. The critical micelle concentration (CMC) of DOPC decreased when the moisture content was increased from 300 to 495 mg/kg oil and gradually increased when the moisture was further increased to 2122 mg/kg oil. As the DOPC concentration increased, the DPPH reactivity of ascorbyl palmitate in the control MCT increased by 10.23-fold, whereas that of the ascorbic acid and α-tocopherol was slightly affected both by the DOPC and moisture content. Presence of DOPC significantly increased the oxidative stability of ascorbyl palmitate-containing corn oil (p < 0.05), whereas these synergistic antioxidant effects were not observed in ascorbic acid-or α-tocopherol-containing corn oil. In conclusion, DOPC displays a synergistic antioxidant effect with ascorbyl palmitate in bulk oil.
评估了 1,2-二油酰基-sn-甘油-3-磷酸胆碱（DOPC）和水分对中链三酰基甘油（MCT）中亲水性和疏水性抗氧化剂溶解度的影响，通过 2,2-二苯基-1-苦基肼基（DPPH）反应性进行评估。接下来，我们根据 DOPC 的存在评估了含抗氧化剂玉米油的氧化稳定性。当水分含量从 300 增加到 495mg/kg 油时，DOPC 的临界胶束浓度（CMC）降低，当水分进一步增加到 2122mg/kg 油时，CMC 逐渐增加。随着 DOPC 浓度的增加，对照 MCT 中棕榈酸抗坏血酸的 DPPH 反应性增加了 10.23 倍，而 DOPC 和水分含量对抗坏血酸和α-生育酚的 DPPH 反应性影响不大。DOPC 的存在显著提高了含棕榈酸抗坏血酸玉米油的氧化稳定性（p<0.05），而在含抗坏血酸或α-生育酚的玉米油中未观察到这些协同抗氧化作用。总之，DOPC 在散装油中与棕榈酸抗坏血酸表现出协同抗氧化作用。
