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Updated: Apr 3, 2026

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Physicochemical and morphological properties of starch from fresh waxy corn kernels
Danupol Ketthaisong1, Bhalang Suriharn1, Ratchada Tangwongchai2
1Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002 Thailand.
Abstract:
The characteristics on physicochemical and morphological properties of starches were investigated in fresh waxy corn kernels. Starches were isolated from eight waxy corn genotypes at the immature kernel stage growing in Thailand. The starch content showed variation with genotypes and ranged from 77.76 to 90.97 %. Granule size distribution showed a two population of starch granules with peak values ranged from 0.8 to 1.1 μm (small) and 9.0 to 12.2 μm (large). Genotypes were also significantly different for average chain length (CL), unit chain length distribution and pasting properties. The small granule (<5 μm) was negatively correlated with CL and degree of polymerization (DP) 25-36 of amylopectin (-0.82 and -0.67, respectively, P < 0.01). And a strong relationship between trough and final viscosity was consistent with the contribution of pasting properties.
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