冻融处理对甘薯热风干燥产品品质影响

Journal of Tianjin Agricultural University ›› 2013, Vol. 20 ›› Issue (3): 9-13.

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Effects of Freeze-thaw Treatment on Product Quality of Hot Air Drying for Sweet Potato

GUO Ting^1,2, HE Xin-yi^{2,3,Corresponding Author}, DENG Fang-ming¹, ZHANG Xin⁴

1. College of Food Science and Technology, Hunan Agriculture University, Changsha 410128, China;
2. Tianjin Engineering and Technology Research Center of Agricultural Products Processing, Tianjin 3000384, China;
3. Department of Food Science, Tianjin Agricultural University, Tianjin 300384, China;
4. China-Japan Joint Center on Palatability and Quality of Rice in Tianjin, Tianjin 300384, China

Received:2013-05-07 Published:2019-10-21

Abstract

Abstract: In order to explore the effects of freeze-thaw treatment on the qualities of sweet potato by hot air drying, the gelatinization properties of sweet potato, changes in conductivity and anthocyanins, and the apparent density, rehydration character, color and hardness of the dry products were investigated. The results show that the sweet potatoes at different freeze-thaw processing were different in gelatinization properties curve, conductivity and anthocyanin content. When treated by one time freeze-thaw cycle, the sweet potato conductivity was the minimum, and anthocyanin content was the highest. With the times of freeze-thaw cycles increasing, the rehydration character of dried products improved, apparent density decreased, and the better color was presented. The products presented the minimum hardness after two times freeze-thaw cycles. This research can provide a theoretical basis for elaborating the mechanism of the freeze-thaw processing to the hot air drying quality changes of the sweet potato.

Key words: freeze-thaw treatment, hot air drying, sweet potato, gelatinization property

CLC Number:

TS215

GUO Ting, HE Xin-yi, DENG Fang-ming, ZHANG Xin. Effects of Freeze-thaw Treatment on Product Quality of Hot Air Drying for Sweet Potato[J]. Journal of Tianjin Agricultural University, 2013, 20(3): 9-13.

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Effects of Freeze-thaw Treatment on Product Quality of Hot Air Drying for Sweet Potato

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