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http://dx.doi.org/10.17495/easdl.2015.10.25.5.887

Physiochemical Characteristics of Raw and Dried Jerusalem Artichoke Jangachi  

Kang, Kyoung Kyu (Agro-Food Resources, National Academy of Agricultural Science, Rural Development Administration)
Choi, Songyi (Agro-Food Resources, National Academy of Agricultural Science, Rural Development Administration)
Kim, Jin Sook (Agro-Food Resources, National Academy of Agricultural Science, Rural Development Administration)
Kim, Gi Chang (Agro-Food Resources, National Academy of Agricultural Science, Rural Development Administration)
Kim, Kyung Mi (Agro-Food Resources, National Academy of Agricultural Science, Rural Development Administration)
Publication Information
Journal of the East Asian Society of Dietary Life / v.25, no.5, 2015 , pp. 887-892 More about this Journal
Abstract
Jerusalem artichoke is often stored poorly after harvesting due to its delicate skin. For this reason, Jerusalem artichoke is mainly distributed in the market as a dried material. In order to improve utilization of dried Jerusalem artichoke, we made Jangachi and analyzed physiochemical characteristics with raw Jerusalem artichoke Jangachi during storage. Raw Jerusalem artichoke was sliced into 7 and 10 mm slices and dried in hot air. After aging, we analyzed rehydration capacity, pH, hardness, salinity, sugar content, and fructan content of both. Dried Jerusalem artichoke sliced into 10 mm slices took over twice as long (420 min) to be rehydrated over 90% than 7 mm sliced (200 min) Jerusalem artichoke. In the case of raw Jerusalem artichoke, hardness showed a tendency to decline. Relatively, hardness of dried Jerusalem artichoke was measured consistently. After 4 weeks, salinity and sugar content were 3.63% and $41.23^{\circ}Brix$ in raw Jerusalem artichoke Jangachi, 3.47% and $37.05^{\circ}Brix$ in 7 mm dried Jerusalem artichoke, and 3.77% and $39.15^{\circ}Brix$ in 10 mm dried sample, respectively. As a result of this study, the possibility of dried Jerusalem artichoke as a pickle was confirmed.
Keywords
Helianthus tuberosus Linne; Jerusalem artichoke; Jangachi; physicochemical characteristics;
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