0.05) higher 2-pentylfuran as compared with the other two
grinding methods, between which hot grinding caused much
lower 2-pentylfuran formation than cold grinding. These values
suggest that heat inactivation of lipoxygenases could partly
restrict the generation of 2-pentylfuran to some extent. Soymilk
from traditional stove cooking contained several times higher 2-
pentylfuran than that from the UHT methods. In stove
cooking, continuous stirring and longtime exposure to light and
air could lead to the extensive formation of singlet oxygen.
Among our processing methods, the hot grinding and the UHT
processing were particularly effective in reducing 2-pentylfuran
to that below sensory threshold values.