To produce soybean milk excellent in flavor, preservability, processing suitability or the like and useful as a processed food such as bean curd and fried bean curd, and a drink by using a raw material soybean irradiated with electron beam having a specific value of energy while turning the soybean by physical action such as vibration.
Electron beam having <1,000,000 eV energy is allowed to irradiate a raw material soybean while turning the soybean by physical action such as vibration, ultrasound, wind power and stirring to provide the objective soybean milk. The electron beam is generated, for example, from a tungsten filament 21 connected to a filament electric source 22. The generated electron is accelerated by an accelerating tube 23 having accelerating electrodes 24 connected to a direct current high voltage electric source 25. The electron flow 31 passing the accelerating tube 23 is introduced to a scanning tube 28 through a scanning coil 27, and the resultant electron flow is taken out through an irradiation window foil 32 composed of a metal foil such as a thin titanium foil.
SUZUKI SETSUKO
SASAKI GENZO
NAKAOKA MOTOKO
MIIKE MIYOSHI
RYOOKOKU SHOJI KK