The physicochemical properties of starches isolated from three kinds of waxy ricer were investigated.
The average diammeter of Orchal starch granule was 3.6μ, and those of Hangang and Baegoon starch granules were 4.8μ and 5.6μ, respectively. X-ray diffraction patterns of all samples were A types. Optical transmittance of starch suspensions was increased rapidly 60∼62℃, 50∼55℃ and 50∼60℃ in Olchal, Hangang and Baegoon, respectively, and all of them exhibited maximum transmittance 75∼80℃ in range. Initial gelationization temperature by means of amylogram pattern was 60∼61℃, then, Olchal starch had a little higher temperature than others. Raising power of them was 260∼220, and then, Olchal starch has a little higher raising power. But, water binding capacity of Baegoon and Hangang were somewhat higher than that of Olchal. Blue values of Olchal and Hangang were similar with 0.13, and that of Baegoon was 0. 14. Alkari numbers of Olchal, Hangang and Baegoon were 4.2, 4.9 and 5.1. The degree of retrogradation of Hangang and Baegoon starch gels were somewhat higher than that of Olchal starch gel.
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