糙皮侧耳（平菇）疏水蛋白的分离纯化及其界面自组装特性研究 文献免费下载

春雨菌业

中文摘要:

从糙皮侧耳Pleurotus ostreatus Pm039菌丝体中分离纯化到一种疏水蛋白并命名为Po.HYD1，SDS-PAGE显示其分子量约15kDa。Po.HYD1具有高度的表面活性，100μg/mL浓度下能够降低水表面张力至25.5mN/m。在1~100μg/mL浓度范围内存在6μg/mL和24μg/mL两个关键浓度，说明了不同浓度范围内自组装条件的改变。水接触角测定证明了Po.HYD1自组装膜的包被能够逆转固体表面的可湿润性。原子力显微镜分析揭示了Po.HYD1在云母表面形成厚度4.2±0.1nm“小杆层”；在高定向热裂解石墨表面形成厚度3.2~3.8nm吸附层；在剧烈振荡诱导下的水溶液中形成形状相似、取向一致但体积大小不等的“耳型”颗粒。

英文摘要:

A hydrophobin designated as Po.HYD1 was purified from Pleurotus ostreatus Pm039. SDS-PAGE analysis showed an approximate molecular mass of 15kDa. Po.HYD1 showed highly surface activity, and it was able to decrease water surface tension to 25.5mN/m at concentration of 100μg/mL. Two crucial concentrations, 6μg/mL and 24μg/mL, were found by protracting the concentration-surface tension curve in range of 1~100μg/mL, which maybe indicate different conditions concerning interfacial self-assembly. Measurement of water contact angles suggested Po.HYD1 can reverse surface wettability through coating solid materials. Atomic force microscopy revealed Po.HYD1 formed distinct assemblages at different hydrophilic-hydrophobic interfaces. It formed “rodlet layer” with thickness of 4.2±0.1nm on mica surface, formed adsorption layer with thickness of 4.2±0.1nm on highly oriented pyrolytic graphite surface, and formed ear-like particles with similar shape, identical orientation and various sizes in aqueous solution by induction of vigorous shaking.

糙皮侧耳（平菇）疏水蛋白的分离纯化及其界面自组装特性研究.pdf (692.9 KB, 下载次数: 670)

2014-3-31 21:57 上传

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