Journal
ULTRASONICS SONOCHEMISTRY
Volume 18, Issue 5, Pages 1172-1179Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2011.03.009
Keywords
Polyacetylenes; Carotenoids; Blanching; Hot air drying; Freeze drying
Categories
Funding
- Irish Department of Agriculture, Food and Fisheries (DAFF) [363 06/RTD/AFRC/518]
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The effect of ultrasound and blanching pretreatments on polyacetylene (falcarinol, falcarindiol and falcarindiol-3-acetate) and carotenoid compounds of hot air and freeze dried carrot discs was investigated. Ultrasound pretreatment followed by hot air drying (UPHD) at the highest amplitude and treatment time investigated resulted in higher retention of polyacetylenes and carotenoids in dried carrot discs than blanching followed by hot air drying. Freeze dried samples had a higher retention of polyacetylene and carotenoid compounds compared to hot air dried samples. Color parameters were strongly correlated with carotenoids (p < 0.05). This study shows that ultrasound pretreatment is a potential alternative to conventional blanching treatment in the drying of carrots. (C) 2011 Elsevier B.V. All rights reserved.
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