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Quality Properties of Commercial Chungkukjang in Korea  

Ko, Yu-Jin (Div. of Applied Life Science (BK21 program), Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Son, Yong-Hwi (Div. of Applied Life Science (BK21 program), Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Kim, Eun-Ja (Div. of Applied Life Science (BK21 program), Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Seol, Hui-Gyeong (Div. of Applied Life Science (BK21 program), Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Lee, Gyeong-Ran (Div. of Applied Life Science (BK21 program), Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Kim, Dong-Hyeon (Korea Jang Cooperative)
Ryu, Chung-Ho (Div. of Applied Life Science (BK21 program), Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Publication Information
Journal of agriculture & life science / v.46, no.1, 2012 , pp. 177-187 More about this Journal
Abstract
This study aimed to improve the quality with acomparison of quality characteristics by collecting Chungkukjang in the market, and to establish the foundation data for starter, which support to manufacture standardized Chungkukjang products. Firstly, Chungkukjang was collected from the industrial company and home-made production which located in the several regions of Korea. Moisture contents of collected Chungkukjang were ranged from 56.3 to 62.1% and salinity was 0.23 to 11.51%. Total nitrogen and amino nitrogen contents of Chungkukjang ranged from 5.82 to 8.76% and 173.71 to 2,700.66 mg%, respectively. Nitrogen degradation ratio, which means the proportion of amino nitrogen to total nitrogen, was 2.88~26.93%. Collected Chungkukjang AG and Z have predominant value in histamine and tyramine contents as 755.40 and 1913.51 mg/kg, respectively, and viable cells count in collected Chungkukjang, maximum was $9.6{\times}10^9CFU/g$. As a result, most products showed various properties in flavor and nutrition, and it is supposed to be caused on use of different soybean species and unstandardized fermentation process.
Keywords
Chungkukjang; Nitrogen degradation ratio; Biogenic amine;
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