Abstract
Potato starch-granules were air-classified into small, medium and large fractions. These starches showed similar X-ray diffraction pattern, chain-length distribution of amylopectin and amylose content. By differential scanning calorimetry (DSC), the recovery temperature associated with gelatinized of small-granules was higher than that of large-ones and the enthalpy energy for gelatinization of small-granules was less than that of large-ones.
The digestibility of large potato starch-granules by hog pancreatin was lower than that of small ones. Rats were fed on the diet containing 50% of either large or small potato starch-granules and native ones for 6 days. The apparent digestibility of each granules was 19, 49 and 33% of large-, small- and native-ones, respectively. Pancreatic amylase activity of rats fed on the large particle diet decreased more than that of rats fed on either pregelatinized potato starch or small particle diet.
