Korean journal of food and cookery science (한국식품조리과학회지)

Korean Society of Food and Cookery Science (한국식품조리과학회)
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Quality Characteristics of Pumpkin Jam when Sucrose was Replaced with Oligosaccharides during Storage

올리고당을 첨가한 호박잼 저장 중 품질 특성 변화

  • 송인선 (충남대학교 식품영양학과) ;
  • 이경미 (충남대학교 식품영양학과) ;
  • 김미리 (충남대학교 식품영양학과)
  • Published : 2004.06.01
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Abstract

The physicochemical and sensory qualities of pumpkin jams, in which sucrose was replaced with oligosaccharides, were investigated during storage at 20$^{\circ}C$. pumpkin jam was prepared with steamed grind pumpkin, mixed with either sucrose only(50％), corn syrup(COS, sucrose 30％＋COS 20％), fructooligosaccharide (FTO, sucrose 30％＋FTO 20％), isomaltooligo saccharide (IMO, sucrose 30％＋IMO 20％), or galactooligo-saccharide(GTO, sucrose 30％＋GTO 20％). The final sweetness of each pumpkin jam was 64$^{\circ}$ Brix. During 60days of storage there were no differences in acidity and pH among the treatments. Reducing sugar content was higher in the pumpkin jam containing COS compared to 次e others. During storage Lightness(Hunter L), redness(a value) and yellowness(b value) increased, of which L and b values were the highest in COS, and the a value were higher in sucrose compared to the other sugars. Adhesiveness and hardness of textural properties were the highest in sucrose. Sensory evaluation results showed that the mean scores of over-all acceptability during storage did not significantly decrease until the 30th day of storage, compared to the freshly made jams. Physicochemical and sensory characteristics of pumpkin jams during storage in a PCA plot were comprised of the first principal component (99.44％) and the second principal component (0.54％).

본 연구에서는 가을철에 다량 생산되는 영양가 높은 호박을 이용한 기능성 가공품을 개발하기 위해 다량의 설탕이 첨가되는 잼에 대체감미료로 올리고당을 첨가한 호박 잼을 제조하여 저장기간에 따른 품질 특성을 비교하였다. 올리고당을 첨가하여 만든 잼의 pH 및 산도는 설탕 및 올리고당의 종류간에 유의적인 차이가 없었다. 환원당 함량은 저장기간이 경과되는 동안 증가하였으며 COS군과 IMO군은 증가폭이 컸으며, 대조군과 FTO군은 증가폭이 적었다. 투명도, 적색도 및 황색도는 저장 기간이 경과됨에 따라 증가하였으며, 명도 및 황색도는 COS군이 높았고 적색도는 대조군이 높았다. 기계적인 조직감 특성 중에서 끈기, 경도, 부착성은 저장기간이 증가됨에 따라 증가하였으며, 당류 중에서는 대조군이 높았다. 관능평가 결과, 제조 직후 호박 잼의 색은 IMO군과 GTO군, 투명도는 COS군과 IMO군, 향은 FTO군과 IMO군이 높았고, 단맛은 대조군이 높았다. 전체적인 수용도는 제조직후 저장기간이 경과됨에 따라 감소하였으며, 이는 향, 맛 특성치의 저하에 기인된 것으로 보인다. 주성분 분석결과 저장기간에 따른 호박 잼의 특성치는 제1주성분이 99.44％, 제2주 성분이 0.54％ 설명 가능하였으며, 향, 투명도, 끈기가 전체적인 수용도에 영향을 주는 것으로 파악되었다.

Keywords

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