机构地区: 华南理工大学食品与生物工程学院
出 处: 《食品与发酵工业》 1998年第5期1-4,共4页
摘 要: 采用差示扫描量热法(DSC)分析了芝麻蛋白热变性的特征曲线,探讨了温度和不同食品添加物对芝麻蛋白热凝聚性的影响,考察了磷酸盐、表面活性剂吐温60、卡拉胶、黄原胶和蔗糖对芝麻蛋白热凝聚性的作用规律。实验结果表明:芝麻蛋白的DSC曲线的变性温度为57.2℃,绝大部分蛋白质在60~80℃范围内开始凝聚;低浓度的磷酸氢钠(<0.05mol/L)能抑止芝麻蛋白热凝聚,高浓度的磷酸氢钠(>0.05mol/L)能促进其热凝聚;吐温60、卡拉胶、黄原胶和蔗糖对芝麻蛋白热凝聚有保护作用,卡拉胶的保护作用优于黄原胶。 The effect of electrolyte, surfactant, edible gums and sugar on the heat coagulation of sesame protein were studied. The heating-denaturation temperature of sesame protein analyzed by DSC method was 57.2℃ and most of sesame protein began to coagulate at 60 ̄80℃.The experimental results showed that Tween 60, xanthan gum,carrageen gum and sugar had the ability to inhibit the heat coagulation of sesame protein. In addition, carrageenin exhibited a better inhibitor of heat coagulation of the sesame protein than xanthan gum. At low concentration of Na 2HPO 4 (<0.05 mol/L), the electrolyte was beneficial to the protein thermal stability while it accelerated the protein coagulatetion at higher concentration(>0.05 mol/L).