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KMID : 0380619890210010052
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Korean Journal of Food Science and Technology
1989 Volume.21 No. 1 p.52 ~ p.57
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Some Physicochemical Properties of Large and Small Starch Granules of Barley
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Abstract
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Large and small starch granules were isolated and characterized from kernels of Hiproly barley. Average size of large granules were 28-30㎛ and that of small granules were 6~m. The small granules consist of 95% of total starch granules. Large granules contained more amylose than small granules. Distribution of isoamylase-debranched starch components, X-ray diffraction patterns, gelatinization characteristics by differential scanning calorimetry, and starch-granule susceptibility to acid were investigated. Large granules contained more long B chains of amylopectin and had the lower ratios of Fr. III to Fr. I , which represent one of the structural characteristics of amylopectin, than those of small granules. Small granules had higher conclusion temperature and smaller heat of gelatinization than those of large granules by D.S.C.. Both granules had A-type pattern of X-ray diffractograms, but hydrolysis of granules with acid showed different A-type patterns between large and small granules.
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