L-α-磷脂酰胆碱含量对挤压重组米回生动力学影响  

The Effect of L-α-PC Addition on Retrogradation Kinetics of Restructuring Rice

作　　者：郑广钊[1] 肖志刚[1] 王利民[1] 严棣[1] 郭艳莉[1] 

机构地区：[1]东北农业大学食品学院,哈尔滨150030

出　　处：《中国粮油学报》2012年第3期6-10,共5页Journal of the Chinese Cereals and Oils Association

基　　金：黑龙江省教育厅科学技术重点项目(12511z006)

摘　　要：利用差示扫描量热仪(DSC)和质构仪对6种挤压重组米淀粉的回生特性和质构特性进行了研究,且分析了L-α-磷脂酰胆碱含量对挤压重组米淀粉回生影响的Avrami方程。试验结果表明:L-α-磷脂酰胆碱对挤压重组米的硬度有较大影响,当添加L-α-磷脂酰胆碱的含量在0.3%～0.7%之间时,添加量越大,挤压重组米存放相同时间的硬度值越低;L-α-磷脂酰胆碱对挤压重组米的老化有明显作用,降低了重结晶的增长速率,回生受到抑制;当淀粉分支度一定的情况下,随着L-α-磷脂酰胆碱含量的升高,速率常数k值降低,晶体的成核方式也由瞬间成核向自发成核方式转化。The retrogradation and texture characteristics of six kinds of Restructuring rice starch were studied by DSC and texture analyser, and the Avrami equation of L -α- PC on retrogradation of Restructuring rice addition was analyzed. The results indicated that L-α- PC have a greater impact on Restructuring rice hardness. When the L -α- PC addition is between 0.3% to 0.7% ,the greater the L -α- PC addition,the lower Restructuring rice hard- ness in the same time ; L -α- PC plays a significant role in Restructuring rice retrogradation, reduces the growth rate of recrystallization and Retrogradation was inhibited ; when the degree of branching of starch in certain circumstances, with the L-α-PC addition increased, k values is descended, and crystal nucleation is also convert from moment of nucleation mode to the spontaneous nucleation.

关 键 词：重组米 回生 Avrami方程 

分 类 号：S377[农业科学—农产品加工]