Abstract
Aim To modify the techno-functional properties of mung bean protein isolate (MBPI) by high-intensity pulsed electric field (HIPEF) treatment and to apply the treated MBPI for encapsulation of Asian seabass oil (ASO). Methods MBPI was prepared using isoelectric precipitation. HIPEF was applied to MBPI solutions at 25 kV/cm with varying pulse numbers (0–400). Physicochemical properties and structure of MBPI were assessed. ASO microcapsules prepared using HIPEF-treated protein as wall material was characterised and tested for storage stability. Results Solubility, surface hydrophobicity, total sulfhydryl content, and emulsifying property of MBPI increased and β-sheets and α-helix were altered after HIPEF treatment at pulse number of 300. ASO microcapsules possessing spherical shape with surface indentations had EE of 72.07 ± 5.08%. ASO capsules had lower lipid oxidation than the control during storage. Conclusion HIPEF improved techno-functional properties of treated MBPI. Treated MBPI could be used as wall material for encapsulation of fish oils.
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