Effects of high hydrostatic pressure on secondary structure and emulsifying behavior of sweet potato protein
文献类型: 外文期刊
第一作者: Khan, Nasir Mehmood
作者: Khan, Nasir Mehmood;Mu, Tai-Hua;Sun, Hong-Nan;Zhang, Miao;Chen, Jing-Wang;Khan, Nasir Mehmood
作者机构:
关键词: sweet potato protein;emulsion;circular dichroism;high hydrostatic pressure
期刊名称:HIGH PRESSURE RESEARCH ( 影响因子:1.431; 五年影响因子:2.243 )
ISSN: 0895-7959
年卷期: 2015 年 35 卷 2 期
页码:
收录情况: SCI
摘要: In this study, secondary structures of sweet potato protein (SPP) after high hydrostatic pressure (HHP) treatment (200-600 MPa) were evaluated and emulsifying properties of emulsions with HHP-treated SPP solutions in different pH values (3, 6, and 9) were investigated. Circular dichroism analysis confirmed the modification of the SPP secondary structure. Surface hydrophobicity increased at pH 3 and decreased at 6 and 9. Emulsifying activity index at pH 6 increased with an increase in pressure, whereas emulsifying stability index increased at pH 6 and 9. Oil droplet sizes decreased, while volume frequency distribution of the smaller droplets increased at pH 3 and 6 with the HHP treatment. Emulsion viscosity increased at pH 6 and 9 and pseudo-plastic flow behaviors were not altered for all emulsions produced with HHP-treated SPP. These results suggested that HHP could modify the SPP structure for better emulsifying properties, which could increase the use of SPP emulsion in the food industry.
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