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Quality Characteristics of Pumpkin Jam when Sucrose was Replaced with Oligosaccharides during Storage  

송인선 (충남대학교 식품영양학과)
이경미 (충남대학교 식품영양학과)
김미리 (충남대학교 식품영양학과)
Publication Information
Korean journal of food and cookery science / v.20, no.3, 2004 , pp. 279-286 More about this Journal
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％).
Keywords
Pumpkin jam; oligosaccharides; qualities; storage;
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