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KMID : 0903519910340040360
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1991 Volume.34 No. 4 p.360 ~ p.365
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Rheological properties of waxy - rice starches gelatinized with thermal or alkali solutions
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Abstract
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Rheological properties of Shinsunchalbyeo(Japonica) and Hangangchalbyeo(J×Indica) waxy-rice starches gelatinized with thermal or alkali solutions were investigated with rotational viscometer(Brabender Viscotron). The two starches showed Bingham pseudoplastics behavior in 4∼8% thermal or alkali gelatinized starch solutions. The shear stress of Hangangchalbyeo starch solution gelatinized with thermal or alkali showed higher values than that of Shinsunchalbyeo starch and the difference of the two varieties gelatinized with alkali showed higher values than that gelatinized with thermal. Consistency index and yield stress values of Hangangchaibyeo starch showed higher than that of Shinsunchalbyeo starch in the two gelatinized methods and the difference of the two varieties gelatinized with alkali showed higher values. And it was higher that the deffendence of consistency index on starch concentration and initial starch concentration of yield stress in the alkali gelatinized samples than those of in the thermal gelatinized ones.
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