The X-ray diffraction patterns of native and heat-treated starches exhibited the typical A-type which is representative of grain starches with strong reflections at 2θ about 15° and 23°, an unresolved doublet at 17° and 18°, and a small peak at 2θ about 20°. Although the crystal unit cells of S-H and SL-H decreased, the X-ray diffraction patterns had no new peaks in the diffractograms, and the crystallization type remained A-type (Fig. 3). The phenomenon indicated that starch modification mainly occurred in the amorphous region [20].