Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Quality Characteristics of Purple Sweet Potato Muffins Containing Rice Flour

쌀가루 첨가량에 따른 자색고구마 머핀의 품질특성

  • Park, Geum-Soon (Faculty of Food Service and Technology, Catholic University of Daegu) ;
  • Kim, Kyung-Eun (Faculty of Food Service and Technology, Catholic University of Daegu) ;
  • Park, Sin-Yeon (Faculty of Food Service and Technology, Catholic University of Daegu)
  • 박금순 (대구가톨릭대학교 외식식품산업학부) ;
  • 김경은 (대구가톨릭대학교 외식식품산업학부) ;
  • 박신연 (대구가톨릭대학교 외식식품산업학부)
  • Received : 2012.08.22
  • Accepted : 2012.11.14
  • Published : 2012.12.30
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Abstract

In this study, purple sweet potato muffins were made with the addition of 0, 25, 50, 75, and 100% rice flour, and their quality characteristics were determined. The weight and height increased with the increase in the amount of rice flour added. The moisture contents decreased significantly. As the amount of rice flour added increased, the pH and acidity decreased. The lightness and yellowness of the rice flour decreased significantly, but the redness increased with increasing purple sweet potato content. The textural properties, such as the cohesiveness, chewiness, and brittleness, were significantly lower in the groups with added rice flour. The DPPH radical scavenging activity was significantly higher in the purple sweet potato muffins to which 50 and 75% rice flour were added compared to those in the control. The results of the sensory evaluation showed that there was no significant difference in flavor among the samples. The chewiness was higher with 50, 75, and 100% rice flour than with 0 and 25% rice flour. The groups with 50 and 75% rice flour had significantly higher scores for overall acceptability compared to the control group.

다양한 생리기능을 지닌 자색고구마를 이용한 머핀에 쌀가루 첨가량을 달리하여 고품질의 자색고구마 쌀머핀을 제조한 후 품질특성 및 관능적 기호도를 조사한 결과는 다음과 같다. 머핀의 무게와 높이는 쌀가루를 첨가 할수록 높이가 높아지는 경향을 보였으며 수분함량은 낮게 나타났다. 쌀가루의 첨가량이 많아질수록 pH는 높아졌으며 반면 산도는 낮아지는 경향을 보였다. 쌀가루 첨가 자색고구마 머핀에서 색도는 쌀가루 첨가량이 증가할수록 명도(L)와 황색도(b)는 감소하였고 적색도(a)는 증가하였다. 경도는 P0(대조군)에서 가장 낮게 나타났으며 쌀가루 첨가량이 증가할수록 높게 나타났고 탄력성은 P4(100% 첨가군)가 가장 높았다. 응집성, 씹힘성과 부서짐성은 쌀가루 첨가량이 증가할수록 낮음을 알 수 있었다. 쌀가루 첨가 자색고구마 머핀의 항산화활성은 55.07~58.34로 나타났으며 P0(대조군)에 비해 P3(75% 첨가군)와 P4(100% 첨가군)가 유의적으로 높게 나타났다(p<0.001). 쌀가루 첨가 자색고구마 머핀 관능검사 결과 외부색에서는 P2(50% 첨가군)에서 내부색은 P0(대조군)와 P1(25% 첨가군)이 높았으며 향미에서는 시료 간 유의한 차이를 보이지 않았다. 질감 중 촉촉한 정도는 P0(대조군)이 가장 높게 나타났으며 P2(50% 첨가군), P4(100% 첨가군)에서 다소 낮게 나타났다. 씹힘성에서는 P0(대조군), P1(25% 첨가군) 보다 P2(50% 첨가군), P3(75% 첨가군), P4(100% 첨가군)가 더 높게 나타났다. 전반적인 기호도에서는 쌀가루 첨가량이 증가할수록 P3(75% 첨가군), P2(50% 첨가군), P4(100% 첨가군), P1(25% 첨가군)순으로 기호도가 높게 평가되었으며 대조군에 비해 P2(50% 첨가군)와 P3(75% 첨가군)이 유의적으로 높은 값을 보여(p<.05) 쌀가루 첨가 자색고구마 머핀 제조시 쌀가루 첨가량을 밀가루 대비 쌀가루 첨가 50~75%를 적정한 비율로 판단되었다.

Keywords

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