Abstract
Electron beam irradiation is a chemical technology which mainly applies to food irradiation preservation, radiation sterilization of medical supplies, radiation chemistry and so on. It can change the molecular structure by using the radioactive radiation. In this present study, soybean protein concentrate powder was treated by electron beam irradiation to investigate its effects on the DH, the peptide antioxidant activity and the microcosmic surface morphology. The results indicated that the electron beam irradiation did not have effect on the DH. However, the peptide antioxidant activity significantly increased when increasing the irradiation dose. The highest peptide antioxidant activity 56.84 % was obtained at 3.24 kGy. Scanning electron microscope (SEM) revealed that there were a number of changes to the microcosmic surface morphology after the electron beam irradiation. Not only the shape of the soybean protein concentrate powder particles was changed, but the surface state was changed as well.
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