Effect of hot air, solar and sun drying treatments on provitamin A retention in orange-fleshed sweetpotato
Bechoff, A., Dufour, D., Dhuique-Mayer, C., Marouzé, C., Reynes, M. and Westby, A. (2008) Effect of hot air, solar and sun drying treatments on provitamin A retention in orange-fleshed sweetpotato. Journal of Food Engineering, 92 (2). pp. 164-171. ISSN 0260-8774 (doi:10.1016/j.jfoodeng.2008.10.034)Full text not available from this repository.
Different drying treatments, cross flow, greenhouse solar, and open air-sun, were applied to an American orange-fleshed sweetpotato variety. Trans-β-carotene losses in flour made from dried chips varied between 16% and 34% in all treatments. Hot air cross flow drying retained significantly more provitamin A than sun drying. Solar and sun drying were not significantly different in terms of provitamin A retention. The shape of the sweetpotato pieces (chip or crimped slice) influenced provitamin A retention during sun drying; crimped slices retained more provitamin A. Other minor provitamin A compounds in fresh sweetpotato included 13-cis- and 9-cis-β-carotene and β-carotene 5,6 epoxide. No significant increase in the cis-isomers was observed after drying. Vitamin A activity in flours was found to be greater than 1,500 RE (β-carotene:retinol; 13:1) per 100 g including in sun-dried samples. Flour from orange-fleshed sweetpotato therefore has potential as a significant source of provitamin A.
|Additional Information:|| Available online 7 November 2008. Published in Journal of Food Engineering, Volume 92, Issue 2, May 2009.|
|Uncontrolled Keywords:||carotenoids, provitamin A retention, drying, sun, solar, hot air, vitamin A activity, sweetpotato|
|Subjects:||S Agriculture > S Agriculture (General)|
S Agriculture > SB Plant culture
|School / Department / Research Groups:||Natural Resources Institute|
Natural Resources Institute > Food & Markets
|Last Modified:||14 May 2013 11:16|
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