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Use of gamma irradiation for microbial inactivation of buckwheat flour and products: Part 8. Effects of electron beam irradiation on sterility and quality of buckwheat flour



Use of gamma irradiation for microbial inactivation of buckwheat flour and products: Part 8. Effects of electron beam irradiation on sterility and quality of buckwheat flour



Food Irradiation Japan 26(1-2): 30-39



Effects of irradiation at 3.0-7.0 kGy with 2 MeV electron beams were investigated on the number of microorganisms and quality of buckwheat flour. Electron beams and gamma-rays were compared in terms of the effects on the quality of buckwheat flour. The results were as follows. (1) Electron beams at 3 kGy reduced the number of microorganisms almost to the same level as gamma-rays. Oxygen content in buckwheat flour had no effect on inactivation of microorganisms by irradiation with electron beams and gamma-rays. (2) Peroxide-value (POV) of lipid in buckwheat flour increased with absorbed dose of gamma-rays and electron beams. The increase of POV was suppressed by the usage of oxygen absorber. The color change of buckwheat flour was suppressed by the usage of oxygen absorber. The color change of buckwheat flour was suppressed by the usage of oxygen absorber as well Acid-value (AV) of lipid in buckwheat flour was not changed by irradiation at high dose with gamma-rays or electron beams. (3) Maximum torque in Farinograph test of dough prepared from irradiated buckwheat flour decreased with increase of absorbed dose of electron beams. However, oxygen absorber suppressed the change of these properties induced by irradiation. (4) The usage of oxygen absorber resulted in a high sensory score of noodles from irradiated buckwheat flour with small changes of color, flavor and texture.

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