Increased Quality Characteristics and Physiological Effects of Chunggukjang Fermented with Bacillus subtilis-SKm
2011
Zheng, Yanfei, Pusan National University, Busan, Republic of Korea | Jeong, J.K., Pusan National University, Busan, Republic of Korea | Choi, H.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Park, K.Y., Pusan National University, Busan, Republic of Korea
The quality characteristics and physiological effects of chunggukjang fermented naturally (NF-c), with Bacillus subtilis-SKm (BS-c), with Bacillus subtilis HJ18-4 (BH-c), and with Bacillus subtilis KCCM 42923 (BK-c) were investigated. The characteristics of fermentation were determined by protease, α-amylase and γ-GTP activities, and additionally the amounts of amino-type and ammonia-type nitrogens. BS-c showed the highest protease, α-amylase, and γ-GTP activities, and also amino-type nitrogen content among the four types of chunggukjang. The ammonia-type nitrogen content in BS-c was similar to that of BK-c and NF-c. BH-c showed the lowest enzyme activities and amino-type and ammonia-type nitrogen content. BS-c, BH-c, BK-c, and NF-c showed a similar overall acceptability during sensory evaluation. BS-c also showed the strongest DPPH free radical scavenging and anti-proliferative activities in HT-29 human colon carcinoma cells. These results suggested that B. subtilis-SKm was suitable to be used as a starter to enhance the quality and effects of chunggukjang.
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