• Title/Summary/Keyword: citron jam

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Quality Characteristics of Citron Jam Made with Frozen Citron in Korea (국내 냉동유자로 제조한 유자잼의 품질특성)

  • Kim, Jae-Wook;Lee, Gyeong-Ha;Hur, Jong-Wha
    • Korean Journal of Food Science and Technology
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    • v.38 no.2
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    • pp.197-201
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    • 2006
  • Long-term storage technology was developed to extend shelf-life of citron (Citrus junos). Changes in quality characteristics of blanched and frozen citron peels (type A, without blanching for control; type B, blanched at $95^{\circ}C$ for 2 min; type C, blanched at $95^{\circ}C$ for 2 min, sugar added; type D, blanched at $95^{\circ}C$ for 5 min) during frozen storage were evaluated. Citron jam was prepared using frozen citron sample B, which showed the highest quality characteristics during storage, and high quality characteristics, such as yield and overall acceptability, were obtained when using 40% frozen citron, 41% sugar, 18.56% glutinous starch syrup, 0.39% pectin, and 0.05% citric acid. During storage of both blanched and frozen citron peels and citron jam made of frozen citron peel, changes in characteristics such as pH, total acids, soluble solids, and browning, were lower than those of control. Sensory evaluation for sourness, sweetness, and overall acceptability of citron jam made with frozen citron peel during storage showed higher values than those of control.