Microbial load and viscosity of brown rice, rough rice, wheat and buck
wheat exposed to electrons at different acceleration voltages were exa
mined and compared with those irradiated with gamma-rays. Electrons at
acceleration voltages of 180-225 kV reduced microbial loads of grains
to <100 CFU/g. The viscosities of aqueous suspensions of grains treat
ed with such low-energy electrons were almost the same or higher than
those irradiated with gamma-rays at 0.1 kGy, much lower than necessary
to disinfect grains. Results suggest that low-energy electrons can de
contaminate grains with little starch degradation compared to gamma-ra
ys.