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http://dx.doi.org/10.11002/kjfp.2015.22.1.56

Quality characteristics of Aronia melanocarpa by different drying method  

Lee, Seul (Department of Food and Food-Service Industry, Kyungpook National University)
Kim, Jong-Kuk (Department of Food and Food-Service Industry, Kyungpook National University)
Publication Information
Food Science and Preservation / v.22, no.1, 2015 , pp. 56-62 More about this Journal
Abstract
In this study, the quality characteristics of different drying methods of Aronia melanocarpa, which contains large amounts of bioactive substances, were investigated for the improvement of their practical use. During the drying period, the weight reduction was the highest with vacuum freeze drying (81.6%). The water content was reduced to the maximum level when vacuum freeze-drying was used. With regard to the color value measurement results, there were no significant differences in the $L^*$ value. Values of $a^*$ and $b^*$ were increased in vacuum freeze drying and cold air drying, but decreased in hot air drying. The hardness was increased dramatically after 36 hours of hot air drying, while with cold air drying, it increased slowly until 132 hr and increased rapidly after 132 hr. The dried yield was the highest with cold air drying (24.2%). As for the general component analysis results of Aronia melanocarpa, the moisture content was the lowest, and the crude protein and crude fat contents were the highest with vacuum freeze drying. No difference in pH value was shown among the dried Aronia melanocarpa obtained from the different drying methods, but the sugar content was the highest with vacuum freeze drying. The mineral content was the highest with cold air drying, and K, Ca, Mg, and Na were the major minerals. The free sugar content of dried Aronia melanocarpa was found to be 5.92~20.59 g/100 g, and the highest free sugar content was found with vaccum freeze drying.
Keywords
Aronia melanocarpa; vacuum freeze dry; hot air dry; cold air dry; quality characteristic;
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Times Cited By KSCI : 5  (Citation Analysis)
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