Korean journal of food and cookery science (한국식품조리과학회지)

Korean Society of Food and Cookery Science (한국식품조리과학회)
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Study on the Application of Indigenous Pigmented Rice for Garaedduk Adapted with Mechanically Impacting Technology

기계적 충격기술이 토종 유색미 함유 가래떡 노화지연에 미치는 효과

  • Han, Seo-Young (Department of Agrofood Resources, National Academy of Agricultural Science, RDA) ;
  • Han, Gwi-Jung (Department of Agrofood Resources, National Academy of Agricultural Science, RDA) ;
  • Park, Hye-Young (Department of Agrofood Resources, National Academy of Agricultural Science, RDA)
  • 한서영 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 한귀정 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 박혜영 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과)
  • Published : 2012.02.28
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Abstract

The present study was performed to expand the application of mechanically impacting technology reported in our previous studies. Several parameters were analyzed to research Korean indigenous pigmented rice. The proximate composition of Korean indigenous rice was the following; 12.0-13.4% moisture, 74.1-77.3% carbohydrate, 6.8-8.7% crude protein, 1.68-3.25% crude lipid, 0.78-1.38% crude ash, with a 6.6-7.07 pH value. The phenolic compound content of red rice was twice that of black rice. Moreover, antioxidative activity was estimated by DPPH radical-scavenging activity (IC50 = 0.15-1.04 mg/mL). Anthocyanin and chlorophyll in each pigmented rice type were detected by spectrophotometer. Garaedduk samples were prepared with non-waxy rice, salt, 24% water, and/or 15% indigenous pigmented rice(red, green and black, w/w of total swelling non-waxy rice) and adapted with or without mechanically impacting technology. Hardness, as a main texture profile parameter of Garaedduk was maintained up to 3 days under storage at $20^{\circ}C$. The results suggest that Korean indigenous pigmented rice can be applied for functional Garaedduk adapted with mechanically impacting technology.

본 연구에서는 선행연구를 통해 얻어진 노화지연 기술의 적용성 확대를 위해 토종 유색미를 활용한 굳지 않는 떡을 개발하여 소재의 응용범위를 확대하고 기술의 가치를 제고하고자 하였다. 개량종에 비해 연구가 전무한 토종 유색미의 가공적성 검토의 기초 연구로서 적미, 녹미의 일반성분 및 색소를 포함한 이화학 특성을 분석하고 항산화 활성을 측정하였다. 그 결과, 적미와 녹미에는 안토시아닌과 클로로필이 함유되어 있음이 밝혀졌으며 탄닌계 색소를 포함한 수용성 페놀화합물이 함유되어 있어 항산화 효능을 갖는 것으로 추론되었다. 또한, 선행연구를 통해 얻어진 노화지연 기술을 적용하여 유색미를 이용한 굳지 않는 떡을 제조한 결과 기술이 적용되는 최적의 혼합비율은 15%였다. 실온에서 3일간 저장하며 경도의 변화를 측정한 결과 제조당일에 가까운 경도를 나타냄을 알 수 있었으며 제조 직후 1일은 약간 경도가 증가하는 경향을 보이나 이는 가래떡 제조 직후의 말랑말랑한 물성의 범위에 속하는 수치에 해당된다고 할 수 있다. 제조 직후의 식감이 유지되는 예상 메카니즘으로는 적당한 품온에서의 전분첨가가 기계적 충격과정을 통해 교차결합을 형성하여 떡 내부의 수분을 유지 하고 있는 것으로 추론된다. 본 연구를 통해 기계적 충격을 바탕으로 하는 노화지연기술 접목이 가능한 유색미의 혼합비율이 도출되었으며 이를 통해 한반도 토종 유색미가 항산화 활성을 갖는 건강지향형 소재로서 굳지 않는 떡의 제조에 활용될 수 있는 가능성이 제시되었다.

Keywords

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