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http://dx.doi.org/10.3746/jkfn.2010.39.4.542

Physico-Chemical Properties of Starches from Atlantic and Bora Valley Potato Cultivar with Different Colors  

Lee, Jae-Soon (Dept. of Food Science & Nutrition, Hoseo University)
Choi, Mi-Kyeong (Dept. of Food & Nutrition, Kongju National University)
Moon, Eun-Young (Dept. of Food Science & Nutrition, Hoseo University)
Kang, Myung-Hwa (Dept. of Food Science & Nutrition, Hoseo University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.39, no.4, 2010 , pp. 542-547 More about this Journal
Abstract
Physico-chemical properties of starches from potato cultivars with different colors were investigated. White Atlantic potato had 10% higher starch yield than violet Bora Valley potato. It turned out that the shape and structure of Atlantic and Bora Valley potato starch were the same by mechanical analysis using X-ray and SEM. The ratio of $50\;{\mu}m$ particle in starches from Atlantic and Bora Valley potato was $45.44\pm2.79%$ and $42.37\pm1.03%$ respectively. The particle size of Atlantic potato starch was less than that of Bora Valley; however, there was no significant difference (p<0.05). As for moisture coupling, there was no difference (p<0.05) between the two potatoes. Swelling power showed a high increase from $65^{\circ}C$ to $80^{\circ}C$. The swelling power of Atlantic starch was higher by about 0.3% than that of Bora Valley at $90^{\circ}C$. Since Atlantic has smaller starch particles than Bora Valley, more starch particles are contained in the same size, and hence a difference in swelling power. As a result of measuring the gelatinization of potato starches from Atlantic and Bora Valley, a higher gelatinization start, climax, and complete temperatures occurred at Bora Valley than Atlantic. As for gelatinization enthalpy, Bora Valley starch with a higher gelatinization temperature consumed more energy for gelatinization.
Keywords
Bora Valley; starch; physicochemical properties; gelatinization;
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