FIG. 3. Time courses of glucose concentration and amino nitrogen content. Koji was
heated at 55°C and 75°C for 7 days. The glucose concentration was measured in koji
before incubation and in HP-koji after it was heated for 1, 3, 5, and 7 days (A). Amino
nitrogen content was measured in koji before incubation and in HP-koji after it was
heated for 1, 2, 3, 5, and 7 days (B). Triangles and circles show HP-koji heated at 55°C
and 75°C, respectively. The error bars indicate the standard deviations of 3 independent
experiments. Values are represented as the mean (standard deviations) (n=3).