disclosed is a novel method of treating nuts with a compressed carbon dioxide gas so as to make them oxidation - resistant . for carrying out the method , a device is used , which can contain a compressed carbon dioxide gas and which is equipped with door or gate to put nuts into and take them out of itself , heater to heat nuts in itself , chiller to chill nuts in itself , and valve to introduce a carbon dioxide gas into itself and release the gas out of itself . nuts as treated by the novel method with the illustrated device are to be satisfactorily oxidation - resistant when they are stored .