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KMID : 0903519900330040301
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1990 Volume.33 No. 4 p.301 ~ p.306
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Effect of tannin contents on the physicochemical characteristics of acorn starch
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Abstract
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The physical and chemical properties of dry acorn starch(DS), detannined acorn starch (DTS) and defatted and detannined acorn starch(DFTS) were investigated. All acorn starch sample, observed by a scanning electron microscope, showed a hemispherical shape and its size was about 5∼10μm in diameter. It had a little change on the pasting temperature of DS, DTS and DFTS but peak viscosity of DTS was somewhat, higher than that of DS. Flow behavior of gelatinized starch pastes showed a pseudoplastic behavior and flow behavior index was lower than unit. The consistency coefficient. showed concentration and temperature dependency. The activation energies of DS, DTS and DFTS were 2.09K㎈/g·㏖∼3.58K㎈/g·㏖ and time dependent characteristic of acorn starch samples showed thixotropic behavior.
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KEYWORD
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