Journal
DRYING TECHNOLOGY
Volume 31, Issue 10, Pages 1114-1123Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/07373937.2013.775587
Keywords
Air convective drying; Blueberry; Color; Porosity; Quality; Shrinkage
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Funding
- NSERC [RGPIN 355740-08]
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The effect of temperature on blueberry drying rate, shrinkage, and color changes was evaluated from drying experiments for both high bush (Vaccinium corymbosum L.) and wild (Vaccinium angustifolium) blueberries. Drying temperature significantly affected texture and color of both varieties. Temperatures above 55 degrees C caused a significant color change (E>25) within 30min of the beginning of drying, followed by a significant drop in density from 1.02 to 0.38g/cm(3). In contrast, drying at temperatures below 50 degrees C resulted in nonsignificant color changes and an eventual density increase to 1.26g/cm(3). It follows that blueberry color could be used as an early stage indicator of quality degradation in the process of drying.
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