색깔이 다른 대서와 보라밸리 감자 전분의 이화학적 특성

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

  • 이재순 (호서대학교 식품영양학과) ;
  • 최미경 (공주대학교 식품영양학과) ;
  • 문은영 (호서대학교 식품영양학과) ;
  • 강명화 (호서대학교 식품영양학과)
  • 발행 : 2010.04.30


색깔이 다른 대서와 보라밸리 감자로부터 전분을 추출하여 수율, amylose, amylopectin 함량비, 팽윤력, 수분결합능 및 X-ray 전분 구조와 같은 전분의 이화학적 특성을 측정하였다. 두 감자간의 amylose와 amylopectin의 함량 비에는 유의적인 차이(p<0.05)가 나타났고 두 감자 모두에서 amylose 함량이 높아 찰성이라기보다는 매성으로 나타났다. X-ray와 주사전자현미경을 통해 입자를 관찰한 결과 대서와 보라밸리의 모양의 차이와 전분 구조의 차이는 보이지 않았다. 대서와 보라밸리 전분의 입도분석 결과, $50\;{\mu}m$ 안에 포함되는 전분입자 크기가 대서는 $45.44\pm2.79%$이며, 보라밸리는 $42.37\pm1.03%$의 분포였다. 대서와 보라밸리 전분의 수분결합능력의 차이는 보이지 않았다. 반면, 팽윤력은 $65^{\circ}C$에서 시작하여 $80^{\circ}C$에서 높은 증가를 보였으며, $90^{\circ}C$에서 보라밸리 전분의 팽윤력보다 대서의 팽윤력이 약 0.3% 정도 높았다. 대서와 보라밸리 전분의 호화도를 측정한 결과 호화 개시온도, 호화절정온도, 호화종결온도에서 대서보다 보라밸리가 높은 온도를 보였다.

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.



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