采用汽爆技术提高羽毛角蛋白生物效价的研究  

Study on bioavailability improving of feather keratin by steam explosion

作　　者：张益奇[1] 赵伟[2] 金妙仁 杨瑞金[2] 张文斌[2] 华霄[1] 徐张贤 

机构地区：[1]江南大学食品科学与技术国家重点实验室,江苏无锡214122 [2]江南大学食品学院,江苏无锡214122 [3]杭州启明星生物营养有限公司,杭州萧山311265

出　　处：《食品与机械》2011年第2期35-37,共3页Food and Machinery

基　　金：杭州市萧山区科技发展计划项目(编号:2009109);国家星火计划项目(编号:国科发计[2010]265号)

摘　　要：利用不同压力的汽爆处理提高羽毛角蛋白生物效价的效果。结果表明,汽爆技术可显著提高羽毛蛋白的消化率以及溶解性,1.8 MPa,60 s时,大约92%的羽毛角蛋白能够转化为胃蛋白酶消化的形式,其在0.2%KOH溶液中的溶解度达到62.6%。半胱氨酸含量与胃蛋白酶消化率,蛋白溶解性呈负相关,汽爆处理后,半胱氨酸含量有一定程度的降低。SDS-PAGE分析表明,汽爆处理后,羽毛角蛋白发生降解。The effect of different steam pressure on feather keratin has been investigated.The results showed that the digestibility and solubility of the feather keratin could be improved remarkably through the steam explosion process.The process with saturated steam of 1.8 MPa for 60 s modified approximately 92% of feather keratin to the pepsin-digestible form and the solubility of the keratin in 0.2% KOH solution was 62.6%.Pepsin-digestible protein and protein solubility were negatively correlated with cysteine content.The content of the cysteine was reduced with the rise of the steam pressure.SDS-PAGE results showed that the protein depolymerized into lower molecular weight units during the process.

关 键 词：羽毛 汽爆 胃蛋白酶消化率 生物效价 

分 类 号：S879.9[农业科学—畜牧兽医]