Ultrasound-assisted thawing of mango pulp: Effect on thawing rate, sensory, and nutritional properties

Abstract

Sensory and nutritional properties of mango pulp thawed by different ultrasound intensities and temperatures were studied. Compared to water immersion thawing, a thawing time reduction of 16–64% (p < 0.05) and more phenolic acids contents (gallic, hydroxybenzoic, and caffeic acid) were observed after ultrasonic thawing. The sensory evaluation revealed texture and aroma deterioration at higher ultrasonic intensities (4 °C:0.074 W/mL; 25 °C:0.123 W/mL) due to increase in viscosity and some volatile compounds in the mango pulp. Ultrasonic thawing treatment at 25 °C reduced thawing time by 51–73% compared to that at 4 °C. Mango pulp processed at 25 °C exhibited better sensory quality and retained 26.5–58.5% more total phenol and 8.7–11.0% more total carotenoid contents. In short, higher ultrasonic intensities (0.074–0.123 W/mL) at a temperature of 25 °C contributed to better thawing efficiency and nutritional quality. The results demonstrated that ultrasound processing at optimized conditions could serve as a potential alternative to conventional thawing processing of mango pulp.