사과박 식이섬유를 첨가한 설기떡의 품질특성

Quality Characteristic of Sulgidduk with Apple Pomace Dietary Fiber

  • 투고 : 2011.08.01
  • 심사 : 2011.08.17
  • 발행 : 2011.08.31

초록

사과박의 식이섬유를 추출하여 설기떡에 첨가 시 첨가량 에 따른 저장 중 품질특성변화를 분석하였다. 설기떡의 색 도는 식이섬유첨가량이 증가함에 따라서 L*값은 87.9로부터 65.9로 감소하였으며 a*와 b*값은 각각 -1.9에서 5.9 및 5.0에서 20.5로 증가하였다. 주사전자현미경(SEM)으로 설기떡의 표면구조를 관찰한 결과 식이섬유를 첨가한 설기떡에는 쌀가루사이에 끼어든 식이섬유가 쌀가루간의 연결을 저해하여 대조구보다 치밀한 구조이지 않았으며 사이사이 공간이 형성되어 있는 것을 볼 수 있었다. 대조구, 10% 및 15%의 식이섬유를 첨가시킨 설기떡의 엔탈피변화는 3 일 후 $4^{\circ}C$ 저장에서 각각 4.83, 3.80 및 3.18 J/g로 나타났으며 $25^{\circ}C$ 저장에서는 각각 1.14, 0.60 및 0.60 J/g이었으며 식이섬유첨가는 설기떡의 노화를 지연시키는 작용을 하였다. 대조구와 식이섬유첨가 설기떡 간의 경도를 비교하여 볼 때 실온저장보다는 냉장저장 시 경도증가(노화)억제효과가 컸으며 $4^{\circ}C$에서 저장 3 일 후 15%첨가 설기떡의 경도는 대조구의 약 42%수준이었다. 기준 검사물과의 차이 검사법에 의한 전체적인 기호도 평가에서 15% 식이섬유를 첨가시킨 설기떡이 제조 직후와 $4^{\circ}C$ 저장에서 3 일 후 모 두 가장 높은 값을 보였으며 대조구와 5%내에서 유의성차 이를 보였다.

This study was performed to analyze the quality characteristics of Sulgidduk added with different ratio 0, 10 and 15% (w/w) of apple pomace dietary fiber powder (DFP). Increasing DFP from 0% to 15% was decreased in color L* value from 87.9 to 65.9, while a* and b* values were increased from -1.9 to 5.9 and from 5.0 to 20.5, respectively. Scanning Electron Microscopy (SEM; ${\times}500$) showed that air cell size in the Sulgidduk surface increased as the DEP increased. On the other hand, control without DFP had a compact structure without air cell. Enthalpy by DSC showed that control without DFP, 10 and 20% DEP Sulgidduk after 3 days of storage were 4.83, 3.80 and 3.18 J/g at $4^{\circ}C$ and those of $25^{\circ}C$ were 1.14, 0.60 and 0.60 J/g, respectively. DEP had more effective on retarded retrogradation of Sulgidduk at $4^{\circ}C$ than that at $25^{\circ}C$. Hardness of 15% DEP Sulgidduk was around 42% compared to that of control without DFP after 3 days of storage at $4^{\circ}C$. In hedonic test, 15% DEP Sulgidduk showed the highest overall quality score among samples after making and storage 3 days at $4^{\circ}C$.

키워드

과제정보

연구 과제 주관 기관 : 농촌진흥청

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