推荐回答(2个)
淀粉糊化指淀粉高温溶胀、裂与水作用形均匀糊状溶液特性淀粉糊化使食品变变松软口适口性易体淀粉酶水解蛋白质存情况淀粉糊化能赋予食品特定质构特性用于焙烤食品
淀粉化指糊化淀粉室温或低于室温条件慢慢冷却经段间变透明甚至凝结沉淀化看做糊化逆程化淀粉与水失亲力难复水食品失口并难于消化
由于淀粉化种逆程食品产需注意淀粉防化防止延缓淀粉化措施主要:1)由于化适温度20℃-40℃使温度高于60℃或低于20℃防止化2)使食品含水量低于10%或者高于60%延缓化3)使酸碱度低于4或者碱性环境淀粉易化4)食品加入脂肪甘油酯糖脂磷脂豆蛋白或聚氧化乙烯等表面性物质延缓淀粉化5)使食品经高温高压膨化处理发化现象
淀粉的糊化是指淀粉在高温下溶胀、分裂,与水作用形成均匀糊状溶液的特性。淀粉的糊化可以使食品变得变得松软可口,适口性好,易被人体淀粉酶水解。而在有蛋白质存在的情况下,淀粉糊化还能赋予食品特定的质构,这一特性被用于焙烤食品中。
淀粉的老化是指糊化后的淀粉在室温或低于室温的条件下慢慢冷却,经过一段时间,变得不透明,甚至凝结沉淀。老化可以看做是糊化的逆过程,老化后的淀粉与水失去亲和力,难以复水,食品会失去口感,并难于消化。
由于淀粉老化是一种不可逆的过程,因此食品生产中需注意淀粉防老化。防止和延缓淀粉老化的措施主要有:1)由于老化最适温度在20℃-40℃,使温度高于60℃或低于20℃可以防止老化。2)使食品含水量低于10%或者高于60%以延缓老化。3)使酸碱度低于4或者碱性环境下淀粉不易老化。4)在食品中加入脂肪甘油酯,糖脂,磷脂,大豆蛋白或聚氧化乙烯等表面活性物质可以延缓淀粉老化。5)使食品经高温,高压膨化处理后,也不会发生老化现象。
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