Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Development and shelf-life determination of senior-friendly strawberry jelly

고령자 친화 딸기 젤리 개발 및 저장수명 결정

  • Kim, Ji Hyeon (Department of Food Science and Technology, Seoul Women's University) ;
  • Min, Sea Cheol (Department of Food Science and Technology, Seoul Women's University)
  • 김지현 (서울여자대학교 식품공학과) ;
  • 민세철 (서울여자대학교 식품공학과)
  • Received : 2017.03.02
  • Accepted : 2017.03.20
  • Published : 2017.04.30
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Abstract

Senior-friendly strawberry jelly was developed using strawberry juice, sugar, xanthan gum, and locust bean gum. The experimental variables included strawberry juice (30.0-40.0%, w/w) and sugar (7.5-10.0%, w/w) concentrations and the xanthan gum/locust bean gum ratio (0.3-4.0), and interactions among these variables were predicted using a response surface methodology. The optimal concentrations of strawberry juice and sugar and the ratio of xanthan gum/locust bean gum, determined against jelly hardness, were found to be 40.0, 10.0, and 1.5%, respectively. The hardness, gumminess, and chewiness of strawberry jelly increased significantly during storage at 5 and $15^{\circ}C$ (p<0.05). The lightness of the gum decreased significantly at both temperatures (p<0.05), whereas the hue angle increased during storage at $15^{\circ}C$. The zero-order kinetics was used to predict the shelf-life of the prepared jelly ($R^2=0.89-0.96$), which was determined to be 38 and 26 days at 5 and $15^{\circ}C$, respectively.

설탕 또는 잔탄검의 함량이 증가함에 따라 딸기 젤리의 경도, 검성, 그리고 씹힘성이 상승하는 경향을 보였다. 딸기 젤리의 텍스처는 딸기 주스의 함량에 따른 경향성을 보이지 않았다. 고령자 친화 젤리에 알맞은 경도(1.3 N)를 가지도록 최적화된 딸기 젤리의 제형은 딸기 주스 함량 40.0%, 설탕 함량 10.0%, 그리고 잔탄검/로커스트콩검의 비율 1.5였다. 모든 저장 온도에서 젤리의 경도, 검성, 그리고 씹힘성은 증가하였고, 명도는 감소하였다. $15^{\circ}C$에서는 저장 일자가 길어질수록 황색화가 증가하였다. 경도를 품질지표로 선정하여 예측하였을 때 $5^{\circ}C$와 $15^{\circ}C$에서의 젤리의 저장수명은 각각 38일과 26일이었다. 본 연구를 통해 냉동 딸기를 이용하여 고령자 친화 딸기 젤리를 개발하였고 제품의 저장 중 품질 특성과 저장수명을 예측할 수 있었다.

Keywords

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