| 摘要 |
<p>PURPOSE:To carry out the removal of the astringency from astringent persimmon in a short time, by setting astringent persimmons in a closed tank, irradiating the astringent persimmon with microwave while keeping the closed tank under reduced pressure, and introducing alcohol vapor and carbon dioxide gas into the closed tank. CONSTITUTION:The astringent persimmons to be treated are set in a closed tank, and the space in the closed tank is maintained to a reduced pressure of about 710mmHg with a vacuum pump. The astringent persimmons are irradiated with microwave radiation with a microwave oscillator for a definite time interval under the reduced pressure. At the same time to completion of the microwave irradiation, alcohol vapor and/or carbon dioxide gas are introduced into the closed tank to raise the inner pressure of the closed tank, thereby permeating said vapor or gas into the pulp of the astringent persimmon equilibrated with the reduced pressure. The astringency of astringent persimmons can be removed uniformly and quickly by this process.</p> |
