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http://dx.doi.org/10.3746/jkfn.2005.34.10.1579

Influence of Addition of Membrane-Filtered Powder of Sunmul on the Quality Characteristics of Yogurt  

Jung, Jin-Young (Dept. of Food Science Nutrition, Daejin University)
Chung, Hai-Jung (Dept. of Food Science Nutrition, Daejin University)
Kim, Woo-Jung (Dept. of Food Science Technology, Sejong University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.34, no.10, 2005 , pp. 1579-1585 More about this Journal
Abstract
The aim of this study was to propose utilization of tofu whey concentrates separated by ultrafiltration (UF) for yogurt production. The curd yogurt was prepared from whole milk added with skim milk Powder in which UF powder was substituted 0$\%$, 6.25$\%$, 12.5$\%$ or 25$\%$ for skim milk powder. The quality characteristics of yogurt in terms of pH, titratable acidity, viscosity, color and viable cell counts were evaluated. There were no significant differences in pH and titratable acidity between control (yogurt added with only skim milk powder) and yogurt added with UF powder after 24 hr of fermentation at 37$^{\circ}C$. Apparent viscosity of yogurt added with UF powder was lower (2,623 $\∼$ 3,189 cps) than that of the control yogurt (3,196 cps). Lightness and redness value of yogurt added with UF powder were not significantly different from control yogurt, while yellowness value increased as the amount of UF powder increased. Addition of UF powder stimulated the growth of lactic acid bacteria. Gas chromatographic analysis detected acetaldehyde, diacetyl, and organic acids, and more volatile compounds were detected in yogurt added with UF powder. Sensory analysis showed that yogurt added with UF powder were evaluated as acceptable as control yogurt. Therefore, UF powder could be substituted for skim milk powder without depressing yogurt qualify.
Keywords
sunmul; yogurt; volatile compounds;
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Times Cited By KSCI : 2  (Citation Analysis)
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