Please use this identifier to cite or link to this item: https://doi.org/10.1111/j.1365-2621.2011.02819.x
Title: Comparison of three microwave-assisted drying methods on the physiochemical, nutritional and sensory qualities of re-structured purple-fleshed sweet potato granules
Authors: Liu, P.
Zhang, M.
Mujumdar, A.S. 
Keywords: Anthocyanin level
Colour
Energy consumption
Microwave-assisted drying
Texture
Issue Date: Jan-2012
Source: Liu, P., Zhang, M., Mujumdar, A.S. (2012-01). Comparison of three microwave-assisted drying methods on the physiochemical, nutritional and sensory qualities of re-structured purple-fleshed sweet potato granules. International Journal of Food Science and Technology 47 (1) : 141-147. ScholarBank@NUS Repository. https://doi.org/10.1111/j.1365-2621.2011.02819.x
Abstract: Purple-fleshed sweet potato (PFSP) with high anthocyanin level was attractive to health concern. Three drying methods, namely microwave-assisted freeze-drying (MWFD), microwave-assisted vacuum drying (MWVD) and microwave-assisted spouted bed drying (MWSBD), were compared in the drying of PFSP granules. Product's texture, colour, anthocyanin level and energy consumption were investigated. Drying periods varied among drying methods. MWSBD needed the least time to finish the drying process. Different drying methods had a significant effect (P<0.05) on texture and anthocyanin level. Maximum penetration force of MWSBD treated sample was lowest (14.99N). Anthocyanin level of MWSBD products was not as high as that of MWFD products, but colour and appearance were fine. MWFD products owned good crispness through sensory evaluation. Energy consumption of MWFD was about two times higher than that of MWVD. Final results indicated that MWSBD may be an alternative way to MWFD with measurements to maintain the anthocyanin level. © 2011 The Authors. International Journal of Food Science and Technology © 2011 Institute of Food Science and Technology.
Source Title: International Journal of Food Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/59743
ISSN: 09505423
DOI: 10.1111/j.1365-2621.2011.02819.x
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