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KMID : 0903520070500030160
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2007 Volume.50 No. 3 p.160 ~ p.166
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Investigation of Physical Property Change in Modified Rice Starch by Ultra Fine Pulverization
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Han Myung-Ryun
Chang Moon-Jeong
Kim Myung-Hwan
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Abstract
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This study was performed to analyze the molecular structural and physical properties changes of modified rice starch, which particle structure was broken using high impact planetary mill and ultra fine pulverizing techniques. The average diameter and specific surface area of rice starch after pulverization decreased 20% and increased 25%, respectively. Low molecular substances content in rice starch using GPC (gel permeation chromatography) increased from 36.5% to 59.5% after pulverizing of rice starch. Damaged starch contents in rice starch also increased from 16.4% to 99.2% after pulverizing of rice starch. Water holding capacity, solubility and transmittance of rice starch after pulverization increased compared to those of control. Apparent viscosity value of rice starch after pulverization decreased to 7% in control based on 30oC and 20 RPM conditions.
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KEYWORD
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high impact planetary mill, molecular structural property, modified rice starch, physical property, rice starch, ultra fine pulverization
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