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Effects of Rice Flours Prepared with Different Milling Methods on Quality of Sulgidduk

제조 방법을 달리한 쌀가루가 설기떡의 품질에 미치는 영향

  • Park, Jae-Hee (Department of Food and Nutritional Science, Kyungnam University)
  • 박재희 (경남대학교 식품영양학과)
  • Received : 2014.07.18
  • Accepted : 2014.09.29
  • Published : 2014.11.30

Abstract

This study investigated the quality characteristics of commercial rice flour (CRF) and rice flours prepared by different milling methods for sulgidduk. For particle distribution, dried rice flour after the 1st roll mill using a pin mill showed a particle size of greater than $710{\mu}m$, whereas a particle size less than $250{\mu}m$ accounted for 48% of whole rice flour. This proportion was higher than CRF after the 2nd step roll mill. Crude protein, lipid, and ash contents were significantly highest in 1st roll mill samples. For color, roll & pin made up of many small particles showed a high L value. CRF and roll & pin showed significantly higher starch damage and water-holding capacity, whereas pasting temperature, peak viscosity, and setback of RVA pasting characteristics were lower than 1st roll mill. When rice cakes were made from three kinds of rice flour, roll & pin was not significantly different compared to the CRF. However, rice cakes made with 1st roll milled rice flour showed rough crumb and crust. Rice cake made with roll & pin or CRF showed similar characteristics for texture. In the quantitative descriptive analysis, rice cake made with roll & pin showed better appearance, flavor, taste, texture, and overall acceptability than CRF and 1st roll mill. Therefore, rice flour prepared by roll & pin could be applied to sulgidduk with high quality.

본 연구는 시판용 쌀가루와 제분공정을 달리한 쌀가루들의 품질 특성을 비교한 후 설기떡 제조에 적합한 쌀가루 가공공정을 제안하고자 하였다. 입도분포는 1st roll로 제분한 후 건조하였을 때 $710{\mu}m$ 초과의 쌀가루만을 건식제분기인 pin mill에 적용한 roll & pin에서 $250{\mu}m$ 이하의 작은 입도가 약 48%를 차지하여 CRF(2nd step roll mill)에 비해 높은 비율을 나타내었다. 일반성분은 1단계의 제분만을 거친 1st roll에서 단백질, 지방, 회분 함량이 높았고, CRF와 roll & pin은 유의적으로 낮은 값을 나타내었다. 색도는 작은 입자의 분포 비율이 많은 roll & pin에서 L값이 높았으며, 손상전분, 물결합력은 CRF와 roll & pin이 유의적으로 높게 나타났다. RVA 호화특성은 CRF와 roll & pin의 호화개시온도, 최고점도 및 노화 정도를 반영하는 setback 값 또한 1st roll에 비해 낮았다. 또한 위 3가지의 쌀가루(CRF, 1st roll, roll & pin)를 이용하여 제조한 설기떡의 외관 관찰에서 CRF와 roll & pin의 경우 큰 차이를 나타내지 않았으나 1st roll의 경우 거친 내상 및 외상을 확인할 수 있었다. 조직감에서는 roll & pin으로 제조한 쌀가루의 설기떡과 CRF로 제조한 설기떡은 유사한 것으로 나타났다. 정량적 묘사분석 결과 외관, 향, 맛, 질감 및 전반적 기호도에서 roll & pin이 CRF나 1st roll에 비해 높은 값을 나타내었다. 따라서 설기떡의 제조 시 건식제분인 roll & pin으로 제조한 쌀가루가 현재 상용화되어 있는 습식제분법인 2 step roll mill보다 제분공정을 간편화한 우수한 설기떡을 제조할 수 있으리라 사료된다.

Keywords

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