AI Article Synopsis
- The molecular mobility of ascorbyl palmitate and α-tocopherol was studied using NMR relaxation, demonstrating how they behave in the presence of DOPC.
- DOPC significantly reduced the mobility of protons in ascorbyl palmitate, while increasing proton mobility in α-tocopherol, indicating different interactions between these compounds and DOPC.
- Ascorbyl palmitate combined with DOPC exhibited enhanced antioxidant properties in corn oil at 60 °C, suggesting that DOPC helps stabilize ascorbyl palmitate, improving its effectiveness in scavenging free radicals.
Article Abstract
Molecular mobility of ascorbyl palmitate and α-tocopherol in the presence of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) were determined by NMR relaxation technique. Synergistic effects of DOPC on the antioxidative capacities of ascorbyl palmitate were evaluated in DPPH radical scavenging assay and bulk oil matrix. NMR relaxation technique can provide information on the mobility of protons. Molecular mobility of two protons in hydroxyl group of ascorbyl palmitate decreased by 85 and 78% in the presence of DOPC compared to those without DOPC. However, proton mobility of α-tocopherol increased by 41% when DOPC was present. DOPC significantly enhanced the DPPH reactivity in medium chain triacylglycerol, while this effect was not observed in α-tocopherol. Mixture of ascorbyl palmitate with DOPC showed synergistic antioxidant properties in corn oil at 60 °C. DOPC may make protons of ascorbyl palmitate in more rigid state, which can enhance hydrogen donating ability and antioxidant properties of ascorbyl palmitate in bulk oils.
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| http://dx.doi.org/10.1016/j.foodchem.2022.134458 | DOI Listing |
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