对不同品种大豆分离蛋白(soybean protein isolate,SPI)的表面疏水性、氨基酸组成及溶液的Zeta电位和粒径分布进行分析,探讨蛋白质溶液Zeta电位和粒径分布与表面疏水性的关系。不同品种SPI的表面疏水性由大到小的变化趋势为:东农46>...对不同品种大豆分离蛋白(soybean protein isolate,SPI)的表面疏水性、氨基酸组成及溶液的Zeta电位和粒径分布进行分析,探讨蛋白质溶液Zeta电位和粒径分布与表面疏水性的关系。不同品种SPI的表面疏水性由大到小的变化趋势为:东农46>皖豆24>黑农46>五星4>中黄13>冀NF58,品种差异对SPI的Zeta电位及粒径分布具有显著影响。相关性分析表明,SPI表面疏水性与氨基酸组成无显著相关性,表面疏水性与Zeta电位绝对值呈显著的正相关,与粒径大小呈显著的负相关。当蛋白溶液Zeta电位绝对值较大时,蛋白表面更多同性电荷间的排斥作用会减少蛋白分子的相互聚集,使蛋白溶液趋于稳定,同时降低蛋白质粒径大小。此时,蛋白质疏水基团的内卷程度降低,并更多暴露在分子表面,导致蛋白质表面疏水性增加。展开更多
The post structure aligned carbon nanotube(ACNT) film was prepared by CVD. it was a ultra-hydrophobic film with a higher contact angle(166°) and lower sliding angle(less than 3°). The post structure ACNT fil...The post structure aligned carbon nanotube(ACNT) film was prepared by CVD. it was a ultra-hydrophobic film with a higher contact angle(166°) and lower sliding angle(less than 3°). The post structure ACNT film showed discrete pillar composed of carbon nanotubes, these pillar formed microstructure in the film, which affected both the contact angle and the sliding angle.展开更多
文摘对不同品种大豆分离蛋白(soybean protein isolate,SPI)的表面疏水性、氨基酸组成及溶液的Zeta电位和粒径分布进行分析,探讨蛋白质溶液Zeta电位和粒径分布与表面疏水性的关系。不同品种SPI的表面疏水性由大到小的变化趋势为:东农46>皖豆24>黑农46>五星4>中黄13>冀NF58,品种差异对SPI的Zeta电位及粒径分布具有显著影响。相关性分析表明,SPI表面疏水性与氨基酸组成无显著相关性,表面疏水性与Zeta电位绝对值呈显著的正相关,与粒径大小呈显著的负相关。当蛋白溶液Zeta电位绝对值较大时,蛋白表面更多同性电荷间的排斥作用会减少蛋白分子的相互聚集,使蛋白溶液趋于稳定,同时降低蛋白质粒径大小。此时,蛋白质疏水基团的内卷程度降低,并更多暴露在分子表面,导致蛋白质表面疏水性增加。
文摘The post structure aligned carbon nanotube(ACNT) film was prepared by CVD. it was a ultra-hydrophobic film with a higher contact angle(166°) and lower sliding angle(less than 3°). The post structure ACNT film showed discrete pillar composed of carbon nanotubes, these pillar formed microstructure in the film, which affected both the contact angle and the sliding angle.
