한국식품영양과학회지 (Journal of the Korean Society of Food Science and Nutrition)

  • 제31권5호
  • /
  • Pages.749-753
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  • 2002
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  • 1226-3311(pISSN)
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  • 2288-5978(eISSN)
한국식품영양과학회 (The Korean Society of Food Science and Nutrition)
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녹차가루 첨가에 따른 밀가루 반죽의 물성 및 호화특성 변화

Effects of Green Tea Powder on Dough Rheology and Gelatinization Characteristics

  • 오유경 (창원대학교 식품영양학과) ;
  • 김창순 (창원대학교 식품영양학과)
  • 발행 : 2002.10.01
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초록

혼합분과 강력분의 farinograph 수분 흡수율, 반죽형성시간, 연화도는 녹차가루 첨가량(0～5%)이 증가할수록 증가하였으며, 안정도는 혼합분은 점차 증가하였고, 강력분은 점차 감소하여 다른 경향을 보였다. 혼합분, 강력분 모두 녹차 첨가량이 증가할수록 반죽의 신장도는 감소하고, 신장 저항도는 증가하여 전체적으로 반죽이 경직되는 경향을 보였다. Amylogaph에서 혼합분과 강력분 시료 현탁액 모두 녹차가루 첨가로 호화개시온도가 상승하였고, 최고호화점도는 감소하였다. DSC에 의한 밀전분의 호화특성에서 환원성 물질인 녹차의 카테킨 성분은 밀전분의 결정질 구조의 용융을 촉진하는 것으로 나타났다.

The effects of green tea powder (GTP) on the rheological properties of dough and gelatinization characteristics were evaluated by farinograph, extensograph, amylograph and DSC. The flours used were high strength flour (HF: 12.5% protein) and blend of 50% high strength flour and 50% low strength flour (HLF: 10.5% protein). As the amount of GTP increased, water absorption, development time and weakness of the dough decreased for both flours, but dough stability increased only for HLF; the extension of the dough decreased but the resistance to extension increased. The pasting temperature increased and maximum viscosity decreased. On the other hand, with the addition of green tea extract to the wheat starch, transition onset temperature, transition peak temper-ature and enthalpy decreased, demonstrating that catechins in green tea facilitate the starch crystal melting.

키워드

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