Properties of Meju Fermented with Multiple Starters
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초록
A test meju (meju 1) was prepared by inoculating two strains of Bacillus amyloliquefaciens (EMD17, MJ1-4), Pichia farinosa SY80, and Rhizopus oryzae into cooked soybeans. A control (meju 2) was prepared by inoculating Bacillus subtilis KACC16450 and Aspergillus oryzae. Another control (meju 3) was prepared using rice straw as the source of microorganisms. Three different mejus were fermented for 56 days outdoors. Meju 1 and meju 2 showed higher pH values than meju 3, whereas meju 3 showed higher titratable acidity than meju 1 and meju 2. Meju 1 showed the highest fibrinolytic activity. Bacillus cereus was not detected in any mejus, but various microorganisms were detected in meju 2 and 3. Histamine was detected in meju 2 and tyramine in meju 3 at lower concentration, which were not detected in meju 1. It was concluded that microbially safe, fermented soybean products could be produced from meju fermented with starters such as B. amyloliquefaciens EMD17 and B. amyloliquefaciens MJ1-4.
Abstract
A test meju (meju 1) was prepared by inoculating two strains of Bacillus amyloliquefaciens (EMD17, MJ1-4), Pichia farinosa SY80, and Rhizopus oryzae into cooked soybeans. A control (meju 2) was prepared by inoculating Bacillus subtilis KACC16450 and Aspergillus oryzae. Another control (meju 3) was prepared using rice straw as the source of microorganisms. Three different mejus were fermented for 56 days outdoors. Meju 1 and meju 2 showed higher pH values than meju 3, whereas meju 3 showed higher titratable acidity than meju 1 and meju 2. Meju 1 showed the highest fibrinolytic activity. Bacillus cereus was not detected in any mejus, but various microorganisms were detected in meju 2 and 3. Histamine was detected in meju 2 and tyramine in meju 3 at lower concentration, which were not detected in meju 1. It was concluded that microbially safe, fermented soybean products could be produced from meju fermented with starters such as B. amyloliquefaciens EMD17 and B. amyloliquefaciens MJ1-4.
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