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http://dx.doi.org/10.17495/easdl.2016.2.26.1.44

Quality Characteristics of Sikhye added with Mulberry (Morus alba L.) Fruit Concentrate  

Yang, Ji-won (Division of Functional Food Research, Korea Food Research Institute)
Jung, Sung Keun (Division of Functional Food Research, Korea Food Research Institute)
Song, Kyung-Mo (Division of Functional Food Research, Korea Food Research Institute)
Kim, Young Ho (Division of Functional Food Research, Korea Food Research Institute)
Lee, Nam Hyouck (Division of Functional Food Research, Korea Food Research Institute)
Hong, Sang Pil (Division of Strategic Food Research, Korea Food Research Institute)
Lee, Kyung Hee (Dept. of Food Service Management, Kyunghee University)
Kim, Young Eon (Division of Functional Food Research, Korea Food Research Institute)
Publication Information
Journal of the East Asian Society of Dietary Life / v.26, no.1, 2016 , pp. 44-54 More about this Journal
Abstract
This study compared the physicochemical characteristics, proximate composition, taste compounds, and antioxidant properties of Sikhye prepared with mulberry fruit concentrate. Analysis of the physicochemical characteristics of Sikhye added with mulberry indicated that sugar content and titratable acidity increased significantly with increasing mulberry concentration, whereas pH decreased significantly. The whiteness index (L) was 36.77~51.40, which significantly decreased with increasing mulberry concentrate. The redness index (a) was -0.90~1.97 and highest in Sikhye sample containing 4% mulberry concentrate. The yellow index (b) was 0.03~1.90 and highest in Sikhye sample containing 1% mulberry concentrate. Analysis of the antioxidant properties of Sikhye added with mulberry indicated that total polyphenol content and flavonoid content increased significantly as the amount of mulberry concentrate increased above 1%. Total anthocyanin color also increased significantly with increasing mulberry concentrate. The mulberry Sikhye sample containing 8% extract showed the strongest antioxidant properties based on DPPH radical scavenging activity, reducing power, and FRAP assay. Evaluation of the sensory properties of Sikhye added with mulberry revealed that the most preferred flavor, color, and taste were observed in Sikhye samples containing 2%, 4%, and 8% extract, respectively. However, the highest overall preference was observed in Sikhye sample containing 2% extract, indicating that 2% concentration was most suitable for Sikhye and that flavor and aftertaste were more critical than taste. Analysis of the storage characteristics of Sikhye added with mulberry indicated that total bacteria count increased across all samples with increased storage period. However, total bacteria count in the added mulberry concentration group decreased in comparison to the control group as the amount of added mulberry increased.
Keywords
Quality characteristics; Sikhye; mulberry fruit; antioxidant;
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Times Cited By KSCI : 24  (Citation Analysis)
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