Glutelin fraction from jackfruit leaf: a novel emulsifier with antioxidant properties and thermal stability, with potential for stabilizing oil-in-water emulsions
A new emulsifier for emulsion stabilization
DOI:
https://doi.org/10.18633/biotecnia.v27.2621Keywords:
antioxidants, particle size distribution, protein fraction, thermogravimetric analysisAbstract
The investigation of plant proteins as emulsifiers has been increasing significantly. The glutelin fraction from jackfruit leaf protein concentrate shows promise as an emulsifier, requiring characterization. As a result, this study aimed to assess the radical scavenging activity (RSA), thermal profile through thermogravimetric analysis, and the kinetic and thermodynamic parameters of the glutelin fraction. Ultrasound was used to create oil-in-water (O/W) emulsions, and their stability was evaluated under different simulated conditions. The glutenin fraction exhibited 50 % ABTS+ RSA at 0.377 ± 0.004 mg/mL and thermal stability up to 239.7 °C. The kinetic and thermodynamic parameters indicated that the glutelin’s thermal decomposition is an endothermic process. The emulsion created by the glutelin fraction at 0.5 % (w/v) exhibited an average droplet size of 2.4 µm. The emulsion remained stable for 5 days at both 4 °C and 25 °C, within a pH range of 6.0 to 8.0. It demonstrated moderate stability when NaCl was present. Glutelin appears to be an effective emulsifier with good thermal stability and RSA for creating O/W emulsions (under certain conditions). This protein fraction is a plant-based alternative to traditional emulsifiers.
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