Abstract
Three types of solutions (distilled water, aqueous ascorbic acid solution and aqueous citric acid solution) were sprayed periodically on the surface of fresh-cut Japanese pear during hot air drying at 40, 50 and 60 °C. The effects of solution spraying on the drying kinetics, the surface hardening, and the sample discoloration were investigated. The drying rates of the sprayed samples increased 58–63, 16–19 and 20–22% in comparison with those of the non-sprayed samples at 40, 50 and 60 °C, respectively. The hardness of the sprayed samples decreased 12–24% and 2–9% compared to that of the non-sprayed samples, and the total color difference (ΔE) was 27–44 and 20–33% less compared the non-sprayed samples at 40 and 50 °C, respectively.
Published Version
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