Abstract
In this study, the effect of external treatment conditions [i.e., heat treatment conditions, storage conditions, pH, and high-intensity ultrasound (HIU)] on the stability of low-density lipoprotein (LDL) in egg yolk plasma modified by phospholipase A2 (PLA2) was studied. Asymmetrical flow field-flow fractionation (AF4) coupled with ultraviolet–visible (UV/Vis), multiangle light scattering (MALS) and differential refractive index (dRI) detectors was employed for the analysis of LDL modified with PLA2. The AF4 results show that PLA2 modification enhanced the stability of LDL in terms of heat treatment and −18 °C storage. However, the extent of aggregation of PLA2-modified egg yolk plasma with HIU treatment (400 W for 10 min) was larger than that of raw egg yolk plasma, and the stability decreased. Alkaline condition (i.e., pH 10) promoted the aggregation of egg yolk plasma regardless of modification with PLA2. The increased knowledge of how external factors studied in this work affect the stability of PLA2-modified LDL could increase the understanding and controlling of properties of the food made of the egg yolk.
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Acknowledgements
The authors acknowledge the support provided by the Nature Science Foundation of Hebei Province (B2016201002 and H2020201295), the Key Project of Hebei Education Department (ZD2019009), the Medical Science Foundation of Hebei University (2020A08), and the Post-graduate’s Innovation Fund Project (hbu2020ss056 and hbu2021ss023).
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Chen, X., Guo, Y., Song, T. et al. Investigation on the stability of low‐density lipoproteins modified by phospholipase A2 using asymmetrical flow field‐flow fractionation. Food Measure 15, 3350–3356 (2021). https://doi.org/10.1007/s11694-021-00918-6
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DOI: https://doi.org/10.1007/s11694-021-00918-6