| 刘德阳,孔祥珍,华欲飞，等.氯化钙诱导大豆分离蛋白冷凝胶相图与流变性质研究[J].中国油脂,2015,40(8):.[LIU Deyang,KONG Xiangzhen,HUA Yufei，etc.Rheological properties and phase diagram of CaCl2-induced soy protein isolate cold-set gel[J].China Oils and Fats,2015,40(8):.] |
| 氯化钙诱导大豆分离蛋白冷凝胶相图与流变性质研究 |
| Rheological properties and phase diagram of CaCl2-induced soy protein isolate cold-set gel |
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| DOI： |
| 中文关键词: 大豆分离蛋白 冷凝胶 CaCl2 相图 流变性质 |
| 英文关键词:soy protein isolate cold-set gel CaCl2 phase diagram rheological property |
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| 中文摘要: |
| 主要研究了CaCl2诱导大豆分离蛋白冷凝胶在不同预加热温度、蛋白质含量和盐浓度下的相图、持水性与流变性质。结果表明：随着预加热温度的升高（75~95℃），诱导大豆分离蛋白冷凝胶形成所需要的CaCl2浓度降低，且相同条件下，蛋白质含量越高，冷凝胶越易形成；冷凝胶持水性与蛋白质含量成正比，与CaCl2浓度成反比，而在85℃预加热温度下冷凝胶持水性最高，75℃预加热温度条件下冷凝胶持水性最低；随着蛋白质含量、预加热温度和CaCl2浓度增加，冷凝胶的凝胶强度和屈服应力逐渐增加；冷凝胶的线性黏弹性区域（LVE）在15 mmol/L CaCl2浓度下随蛋白质含量增加而增加，但在10 mmol/L CaCl2浓度下呈现出相反的变化趋势；15 mmol/L CaCl2诱导冷凝胶在一定应变下会发生流动现象，而10 mmol/L CaCl2诱导冷凝胶没有流动现象，表明两种CaCl2浓度下形成的冷凝胶结构有很大差异。 |
| 英文摘要: |
| The phase diagram, water holding capacity（WHC） and rheological properties of CaCl2-induced soy protein isolate cold-set gel under the conditions of different preheating temperatures, protein contents and salt concentrations were studied. The results showed that with the increase of preheating temperature（from 75℃ to 95℃）, CaCl2 concentration which was needed to form soy protein isolate cold-set gel decreased, and under the same condition, the higher the protein content, the easier the formation of cold-set gel; WHC of cold-set gel had a positive correlation with protein content and negative correlation with CaCl2 concentration. Under the condition of preheating temperature 85℃,the WHC of cold-set gel was the highest, while it was the lowest under the condition of preheating temperature 75℃; with the increases of protein content,preheating temperature and CaCl2 concentration, the gel strength and yield stress of the cold-set gel improved.The linear viscoelastic region of cold-set gel induced by 15 mmol/L CaCl2 was positively correlated with protein content,while it showed opposite trends with the increase of protein content when the cold-set gel was induced by 10 mmol/L CaCl2. The cold-set gel induced by 15 mmol/L CaCl2 could flow with certain strain, while the cold-set gel induced by 10 mmol/L CaCl2 couldn’t flow under the same condition, which indicated that the structures of cold-set gels induced by 10 mmol/L CaCl2 and 15 mmol/L CaClv were very different. |
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