The effects of blanching on TI inactivation and hexanal generation in soy milk are presented in Table 4. The residual TI
in the soy milk prepared from blanched soybeans ranged from 51% when heated at 80 °C for 3 min to approximately 75% when heated at 80 or 85 °C for 30 s. Please note that the TI in the raw soy milk made from Proto was higher than that presented in Table 1. This was because the Proto materials were from different years of harvest. The Proto soybeans used for Tables 1 and 2 were harvested in 2005, whereas the Proto soybeans used for blanching experiments
were from the 2006 crop. Earlier we also observed a very high TI in the raw Proto soy milk in our yuba research .