초록

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Monascus anka produces biologically active materials, and liquid M. anka koji was employed for preparing fermented hot pepper soybean paste (kochujang). Three kinds of koji (M. anka, Aspergillus oryzae and mixed koji) were used to prepare kochujang, and changes of physicochemical characteristics wer...

Monascus anka produces biologically active materials, and liquid M. anka koji was employed for preparing fermented hot pepper soybean paste (kochujang). Three kinds of koji (M. anka, Aspergillus oryzae and mixed koji) were used to prepare kochujang, and changes of physicochemical characteristics were examined during fermentation. A. oryzae koji showed the highest ${\alpha}-amylase$ and protease activities; whereas, M. anka koji showed the highest ${\beta}-amylase$ activity in liquid koji. Water content of kochujang continuously decreased, whereas viscosity increased during fermentation. The water content and viscosity was 46% and $1.4{\times}10^5\;cP$, respectively after 40 days of fermentation. The pH of kochujang with M. anka and/or A. oryzae koji was $4.63{\sim}4.65$ in the beginning and was between 4.53 and 4.67 after 40 days of fermentation. L-, a- and b-values decreased rapidly during fermentation until 20 days of fermentation. After 40 days, L- and b-values of kochujang prepared with M. anka koji showed lower values than A. oryzae, and a-value showed higher values as the amount of M. anka koji increased. Ammoniacle nitrogen content continuously increased during fermentation. Amino nitrogen content was the highest, 241.2 ㎎%, and ammoniacle nitrogen was the lowest, 97.2 ㎎%, in kochujang prepared with A. oryzae. However, amino and ammoniacle nitrogen content showed no difference between M. anka and A. oryzae koji kochujang. Kochujang prepared with M. anka koji showed a potential that kochujang can be manufactured lower level of red pepper than previously used.

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