Characterization of water state and distribution in textured soybean protein using DSC and NMR

文献类型： 外文期刊

第一作者： Chen, Feng Liang

作者： Chen, Feng Liang;Wei, Yi Min;Zhang, Bo

作者机构：

关键词： soybean protein isolate;extrusion texturization;water state and distribution;differential scanning calorimetry (DSC);low field nuclear magnetic resonance (LF-NMR)

期刊名称：JOURNAL OF FOOD ENGINEERING （ 影响因子：5.354； 五年影响因子：5.144 ）

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收录情况： SCI

摘要： To explore the role of water during extrusion cooking and the scientific basis for demarcating low-intermediate moisture and high-moisture extrusion technique, soybean protein isolate (SPI) was processed using a pilot-scale twin-screw extruder under 28-60% moisture content and 140-160 ℃ cooking temperature. The state of water in textured soybean protein (TSP) with different treatments were analyzed by using differential scanning calorimetry (DSC) and low field nuclear magnetic resonance (LF-NMR) together. The distribution of water in TSP was characterized by using magnetic resonance imaging (MRI). The results showed that there were at least two categories of water with different states or mobility in TSP, and the results of water state and critical water content in TSP measured by DSC and NMR were consistent. The distribution of water in TSP was homogeneous, and the intensity of distribution increased markedly with total water content increasing.

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