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KMID : 0665420060210030330
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Korean Journal of Food Culture
2006 Volume.21 No. 3 p.330 ~ p.335
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The Effects of the Addition of Orange and Grape Concentrates, and Fructose on the Quality Characteristics of Soy Kefir
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Lee Sook-Young
Na Sung-Hoon
Lee See-Young
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Abstract
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The objectives of this study were to characterize the quality of soy kefir made with soymilk in combination with fructose (5%, 10%) and one of the extracts from orange (10%, 15%) and grape (5%, 10%) with differently adjusted amounts as defendant variables. The lactic acid bacteria, yeast and total microbial counts of soy kefir were respectively 1.3×10^7 1.6×10^8CFU/ml, 1.5×10^8 CFU/ml, CFU/ml, soy kefir was propered to drink. pH of soy kefir mixed by orange and grape extracts was decreased significantly according to add fructose 5%. Acidity became significantly high when orange and grape extracts were added, which means acidity showed similar tendency in the opposite direction. The saccharinity of soy kefir was not significantly in orange extract, but soy kefir added fructose 10% was high more than fructose 5% in grape extract. In sensory evaluation, soy kefirs added orange extract 15%, fructose 5% and grape extract 10%, fructose 5% were estimated highly on color, astrigent taste, sour taste, mouth feel and overall quality.
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KEYWORD
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soy kefir, soy milk, orange extract, grape extract, fructose
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