Self-Assembly of Rice Bran Globulin Fibrils in Electrostatic Screening: Nanostructure and Gels
文献类型： 外文期刊
作者： Huang, Lihua 1 ; Zhang, Yehui 2 ; Li, Haibin 1 ;
作者机构： 1.Guangzhou City Polytech, Dept Food, Guangzhou 510405, Guangdong, Peoples R China
2.Sericulture & Agrifood Res Inst GAAS, Guangdong Key Lab Agr Prod Proc, Guangzhou 510610, Guangdong, Peoples R China
期刊名称：JOURNAL OF NANOMATERIALS （ 影响因子：2.986； 五年影响因子：2.753 ）
ISSN： 1687-4110
年卷期： 2014 年
页码：
收录情况： SCI
摘要： The effects of various ionic strengths and protein concentrations on the fibrils structure and gel properties of rice bran globulin (RBG) at pH 2.0 were investigated using atomic force microscopy (AFM), rheometer, and scanning electron microscope (SEM). AFM images showed the morphology of assembling RBG fibrils from strand beads to becoming branch clustered, when electrostatic repulsive forces attenuated gradually with increasing ionic strength. NaCl seems to accelerate the kinetics of fibrils formation, resulting in a significant increase in Th T fluorescence intensity. The increased ionic strengths promote particle size increasing and zeta potential decreasing synchronously. The percolation model G' similar to (C - C-p)(n) be used to calculate theoretical RBG gels concentration at various ionic strengths (0-500 mM), which decreased from 15.17 +/- 0.63 to 2.26 +/- 0.27 wt%. SEM images exhibited a granular mesh-like gel structure. A more homogenous structure occurred in low ionic strength. This study elucidates properties of RBG fibrils and gels as a bioactive material.
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