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Quality Characteristics and Antioxidant Properties of Saccharified Banana Gruels

바나나 첨가량을 달리한 당화 바나나죽의 품질특성 및 항산화효과

  • Kim, Jin Sook (Dept. of Agrofood Resources National Academy of Agricultural Science, RDA) ;
  • Kim, Ja Young (Dept. of Agrofood Resources National Academy of Agricultural Science, RDA) ;
  • Kim, Gi Chang (Dept. of Agrofood Resources National Academy of Agricultural Science, RDA) ;
  • Kim, Kyung Mi (Dept. of Agrofood Resources National Academy of Agricultural Science, RDA) ;
  • Kang, Myung Hwa (Dept. of Food Science and Nutrition, Hoseo University)
  • 김진숙 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김자영 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김기창 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김경미 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 강명화 (호서대학교 식품영양학과)
  • Received : 2013.03.18
  • Accepted : 2013.05.31
  • Published : 2013.07.31

Abstract

We conducted this study in order to investigate the quality and antioxidant properties of saccharifed banana gruel containing different levels (0, 15, 30, and 45%) of banana puree. Saccharified banana gruel with different ratios of banana was prepared and proximate composition, sweetness ($^{\circ}brix%$), pH, total acidity, Hunter's color value, viscosity, free sugar, sensory evaluation, and physiological activities of the sample were measured. With increasing banana content, proximate composition, sweetness, and acidity of banana gruel increased, and pH showed a significant decrease (P<0.05). Saccharified banana gruel prepared with 15~45% banana showed significantly lower viscosity. As the level of banana increased, L-value decreased, whereas the a-value, b-value increased. Free sugar content of fructose, glucose, maltose, and sucrose showed a significant increase (P<0.05). Saccharified banana gruel with 30% added banana was the most preferred for color, flavor, taste, mouth-feeling, texture, and overall acceptability. The total phenolic compound contents of saccharified banana gruel with banana puree ranged from 1.73 to 5.75 mg/g. DPPH and ABTS radical scavenging activities of saccharified banana gruel with banana puree were 8.67~31.26% and 6.02~55.16%, respectively. With increasing banana content, total polyphenol contents, DPPH and ABTS radical scavenging activity of banana gruel showed a significant increase (P<0.05). From these results, we found that addition of 30% banana was the best method for preparation of gruel with high sensory quality.

본 연구에서는 탄수화물 주원료에 과일을 넣어 호화 및 가열과정을 거쳐 새로운 맛과 영양, 항산화능 효과가 향상되는 당화 과일죽의 조리법을 기본으로 한다. 죽의 기본 원료인 쌀가루에 당화과정을 거쳐 생성된 쌀 당화액(rice mash)과 남녀노소 누구나 수용성이 높은 과일 바나나를 0~45%를 넣고 제조한 당화 바나나죽의 품질 특성과 항산화성을 조사하였다. 바나나 첨가량을 0, 15, 30 및 45% 수준으로 첨가한 당화 바나나죽의 수분, 조회분, 조지방 및 조섬유는 그 첨가량에 따라 증가하는 경향이었다. 바나나의 첨가수준을 0~45%로 달리하여 제조한 당화 바나나죽의 pH는 6.58~5.23 범위로 바나나 첨가량이 많아질수록 유의적으로 감소된 반면(P<0.05), 총산도는 0.03~0.13 범위로 증가되었으나 유의적이지 않았다. 당화 바나나죽의 당도는 바나나 0~45% 첨가 수준에 따라 10.80~14.20으로 증가되었으나 유의적 차이는 없었다. 바나나를 0~45% 수준으로 첨가한 당화 바나나죽의 점도는 2683.3~1920.0 cP로서 바나나 첨가량이 많아질수록 상대적으로 점도가 낮아지는 경향이었다. 당화 바나나죽의 L값은 바나나 0~45% 첨가수준에 따라 75.69~49.82로 감소된 반면(P<0.05), a값과 b값은 각각 0.17~4.10, 9.09~10.47로 증가하였다(P<0.05). 바나나를 15~45% 수준으로 첨가한 당화 바나나죽의 유리당은 glucose, fructose, maltose, sucrose가 검출되었고, 총 유리당 함량도 바나나 첨가량에 따라 증가하는 경향이었다(P<0.05). 관능적 특성 조사 결과에서 바나나 15~45% 첨가구(BA15, BA30, BA45)는 바나나 무첨가구(BA0)보다 색, 향, 맛, 입안에서의 느낌, 조직감 및 전반적인 기호도가 좋았는데, 특히 바나나 30% 첨가구는 바나나 45% 첨가구와는 달리 맛 특성에서 유의적으로 높은 점수를 보였다(P<0.05). 바나나를 0~45% 수준으로 첨가한 당화 바나나죽의 total polyphenol 함량, DPPH 소거능 및 ABTS 라디칼 소거 활성은 바나나 첨가량에 따라 증가되는 경향이었다. 이상으로 물 대신에 쌀 당화액을 조리수로 이용한 당화 바나나죽은 탄수화물 중심인 쌀에 영양과 향미가 좋은 완숙 바나나를 최대 45% 수준까지 첨가하여 죽을 제조할 경우, 유리당, 당도, 관능적 특성 및 항산화능력이 향상되었다. 다만 관능적 특성상에는 최대 30% 수준에서 전체적 기호도가 좋았음을 확인하였으므로 향후 바나나를 비롯한 새로운 과일죽 제품개발에 기초자료로서 활용되기를 기대한다.

Keywords

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