KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Physicochemical Properties of Endosperm Starch and Breadmaking Quality of Rice Cultivars

쌀 품종의 배유 이화학적 특성에 따른 제빵 적성 비교

  • 윤미라 (농촌진흥청 국립식량과학원) ;
  • 천아름 (농촌진흥청 국립식량과학원) ;
  • 오세관 (농촌진흥청 국립식량과학원) ;
  • 고상훈 (세종대학교 식품공학과) ;
  • 김대중 (농촌진흥청 국립식량과학원) ;
  • 홍하철 (농촌진흥청 국립식량과학원) ;
  • 최임수 (농촌진흥청 국립식량과학원) ;
  • 이정희 (농촌진흥청 국립식량과학원)
  • Received : 2011.06.28
  • Accepted : 2011.08.04
  • Published : 2011.09.30
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Abstract

The physicochemical properties of rice endosperm from five rice varieties and effects of milling on baking bread properties of rice flour were investigated. Five rice varieties exhibited different level of amylose content. The ratio of longer amylopectin chain length to the distribution of endosperm starches was the highest in Goami3. According to the RVA measurement of rice flours, the pasting temperatures of Seolgaengbyeo and Goamibyeo were lower than those of the other rice varieties. There were differences in the changes of swelling power of rice flour under increasing temperature. Each rice flour sample for bread-making was processed into two different particle size by using an air-classification mill, and significant differences were observed among cultivars in the average particle size and damaged starch content of rice flours. Rice flour of Seolgaengbyeo with fine particle size showed the highest value in specific volume after baking.

본 연구는 특수미 품종의 쌀 배유 특성을 조사하고 기류 분급에 의한 쌀가루를 제조하여 특성 변화와 제빵 가공적성을 검토하였다. 품종별 배유 특성을 살펴보면 높은 아밀로오스 함량, 긴 아밀로펙틴 측쇄사슬 비율, 낮은 팽윤력, 높은 호화온도, 낮은 호화점도의 특성을 가진 품종은 제빵 가적성에는 바람직하지 못한 영향을 주어 빵의 비체적 특성이 저조하였다. 또한 제분에 의한 품종별 쌀가루 특성 변화 및 제빵 특성 비교에서 다른 품종에 비해 쌀알의 경도가 낮은 연질의 설갱은 기류식 제분 조건에 크게 영향을 받지 않고 미분화가 잘 되어 약 $60{\mu}m$의 미세한 입자크기를 가지면서 손상전분 함량이 가장 낮은 특성을 보였다. 품종별 제분에 따른 쌀가루의 입자크기가 작을수록 빵의 부피가 감소하고 비체적이 낮아지는 경향을 나타내었으나 설갱벼는 가장 우수한 빵의 모양과 높은 비체적을 보였다.

Keywords

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