Study on Boletus Aereus Freezing Pattern by Liquid Nitrogen Flash Freezer

The Boletus aereus freezing pattern was studied through analyzing the freezing curve at different temperature, freezing speed and juice leakage by liquid nitrogen flash freezer.The results show that there are three freezing stages by slow freezing, but the three freezing stages are not obvious by liquid nitrogen flash freezer. The propoal is to freeze the mushroom under-80℃,the frozen food is stored 6 months at-26℃,and its juice leakage is less than 2.7% after thawing.