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Studies on the Manufacture of Peanut Yogurt  

방병호 (서울보건대학 식품영양과)
서정숙 (서울보건대학 식품영양)
정은자 (서울보건대학 식품영양)
김관필 (롯데중앙연구소)
Publication Information
The Korean Journal of Food And Nutrition / v.17, no.1, 2004 , pp. 53-59 More about this Journal
Abstract
To increase the nutritional and economic value of commercial peanut yogurt, a peanut yogurt was prepared by 12% skim milk added defatted peanut powder(DPP). The proximate compositions of DPP were moisture 2.3%, crude protein 31.39%, crude lipid 38.84, ash 2.89% and carbohydrate 24.58, respectively. The yogurt product were evaluated for acid production(pH, titratable acidity), number of viable cell, viscosity, color, quality-keeping property and sensory property. By addition of 5% and 10% DPP, the titratable acidity of yogurt was higher than that of yogurt not added DPP. The propagation of lactic acid bacteria was stimulated by adding 5% DPP, and the number of viable cells were about 8.9 log cfu/ml. On the other hand, the number of viable cells in control were 8.3 log cfu/ml. Viscosity of yogurt made from adding 5% and 10% DPP was higher than that of yogurt with only skim milk. When yogurt added with DPP was kept for 15 days at 5$^{\circ}C$ its quality-keeping was relatively good. As the DPP increased, L value(lightness) decreased and a value(redness) increased obviously but the b value(yellowness) of 5% peanut yogurt increased and 10% and 15% again decreased. The overall sensory scores of yogurts added with DPP showed lower than that of yogurt with only skim milk.
Keywords
yogurt; peanut yogurt; defatted peanut powder;
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