High hydrostatic pressure(HHP)of 300,450,600MPa was applied on waxy corn starch as a physical modification.The effects of high hydrostatic pressure on gelatinization and retrogradation properties of waxy corn starch were investigated.The appearance and particle size of the granules were studied by micro-polariscopy,scanning electron microscopy and laser diffraction instrument.Combining X-diffraction and DSC spectrum,the change from crystal to non-crystal was confirmed.A compressing effect on HHP treated sta...