Influence of temperature and ionic conditions on the rheology and droplets characteristics of winged bean protein stabilized oil-inwater emulsion

To explore the potential of winged bean seed protein as a food ingredient, an oil-in water emulsion, [25% (w/w), pH 3] stabilized by the protein (5% solution) was prepared by high-pressure homogenizer and subjected to heat (35–75 °C), cold (4–8 °C) and NaCl (1–4%) conditions alone or in combination, and their physicochemical stability to the treatments was assessed by measuring creaming, droplets characteristics and rheology. Result showed a slight increase in mean droplet size at treatment up to 35 °C and 1–2% NaCl. At treatment of ≥ 55 °C and ≥ 3% NaCl, significant increases in mean droplet size were observed, droplet distribution changed from monomodal to bimodal, advanced flocculation and coalescence up to 75 °C, leading to poly-disperse distribution. No flow was observed until a yield value (σ0) was overcome. At 1% NaCl, the σ was 13 Pa s compared to 21 Pa s at 3–4% NaCl, and above 35 °C treatment, emulsions had high apparent viscosity and exhibited Bingham plastic model resulting from increased droplets sizes.

Text (Abstract) Influence of temperature and ionic conditions on the rheology and droplets characteristics of winged bean protein stabilized oil-inwater emulsion.pdf Download (96kB) Official URL or Download Paper: https://www.researchgate.net/publication/327407657...

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