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http://dx.doi.org/10.11002/kjfp.2014.21.4.573

Comparison for enzymic activity of Nuruk and quality properties of Yakju by different fungi  

Huh, Chang-Ki (Imsil Institute of Cheese Science)
Kim, So-Mang (Department of Food Science and Technology, Sunchon National University)
Kim, Yong-Doo (Department of Food Science and Technology, Sunchon National University)
Publication Information
Food Science and Preservation / v.21, no.4, 2014 , pp. 573-580 More about this Journal
Abstract
The enzymatic activity of Nuruk and the quality properties of Yakju were investigated according to different fungi. The fungi that were used in this study were Aspergillus kawachii KCCM 32819, Aspergillus niger KCCM 32005, Rhizopus japonicus KCCM 11604, Rhizopus oryzae KCCM 11272, Rhizopus oryzae KCCM 11273, Rhizopus oryzae KCCM 11276, and Mucor rouxii KCCM 60148. The study results are as follows. The saccharogenic power of Rhizopus oryzae KCCM 11272 Nuruk was the highest (3,647.72 SP/g) among all the samples. The ${\alpha}$-amylase production and protease activities were highest (3.76 DU and 4.7 tyrosine mg/min, respectively) in the Rhizopus japonicus KCCM 11604 Nuruk. The pH levels of the Yakju made with commercial Nuruk and Rhizopus japonicus KCCM 11604 Nuruk were 4.14 and 4.07, respectively. The total titratable acid content of the Yakju made with Rhizopus oryzae KCCM 11273 Nuruk was the highest (0.56%) among all the samples. Rhizopus japonicus KCCM 11604 and Rhizopus oryzae KCCM 11272 had the highest ethanol yields (15.18% and 15.10%, respectively). In the sensory evaluation carried out in this study, the panel preferred the Yakju made with Rhizopus japonicus KCCM 11604 Nuruk. Overall, however, the panel did not like the Yakju made with Aspergillus niger KCCM 32005 Nuruk.
Keywords
fungi; nuruk; yakju; enzymic activity; quality property;
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Times Cited By KSCI : 3  (Citation Analysis)
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