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Physicochemical properties of starch of three cultivars of Korean kidney Bean Starches, Pink (PKB), Red (RKB) and White (WKB) were studied. Starch granule was oval/round and smooth in all samples. The amylograms showed a continuous increase of viscosity without peak during heating. The water-binding...

Physicochemical properties of starch of three cultivars of Korean kidney Bean Starches, Pink (PKB), Red (RKB) and White (WKB) were studied. Starch granule was oval/round and smooth in all samples. The amylograms showed a continuous increase of viscosity without peak during heating. The water-binding capacities of starches of PKB, RKB and WKB were 102.1%, 94.7% and 106.9%, respectively. The swelling powers were rapidly incresed in all samples. The amylose content, blue value and relative viscosity of kidney bean starches were $31.1{\sim}32.8%,{\;}0.64{\sim}0.66$ and $2.27{\sim}2.61{\;}mlg^{-1}$, respectively. The transmittance of starch suspension was linearly increased as the temperature raised from $65^{\circ}C{\;}to{\;}85^{\circ}C$. The gelatinization temperature ranges determined by differential scanning calorimetry (DSC) were $71.1{\sim}86.9^{\circ}C for PKB, $71.1{\sim}86.0^{\circ}C$ for RKB and $60.8{\sim}77.9^{\circ}C$ for WKB.

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