different among different freezing rates after 0-7 months of frozen
storage at 18 C (P >0.05). The amylopectin retrogradation
enthalpy of cooked rice increased gradually from 0 to 7 months of
frozen storage (Fig. 5). These results were different from those with
bread during frozen storage which reported that there were no amylopectin
retrogradation in bread during frozen storage. However, Perdon
et al. (1999) found that starch retrogradation enthalpy of cooked
rice increased with storage time when stored at 13 C. The
differences of starch retrogradation of bread and cooked rice may
be due to the different compositions and starch structures and
processing methods between bread and cooked rice.