Difference in mode of action toward starch granule between our system and ionizing radiation is obvious, although both are free radical producing. Mishina and Nikuni reported that r-irradiation caused depolymeri-zation of potato starch granules to give
glucose, maltose, dextrins, and further oxidized products of low molecular weight as
well as changes in viscosity, ultraviolet and infrared spectra, and X-ray diffraction pattern. In conclusion, it may be assumed that the slight changes in starch molecules by ascorbic acid-hydrogen peroxide system alter the configurational relation between amylose and amylopectin in starch granules which gives rise to specific changes in viscosity and enzymatic susceptibility.