同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司

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测量应用案例-20201004

2020-10-21 13:20:00

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文献名: Bovine hemoglobin adsorption onto modified silica nanoparticles: Multi-spectroscopic measurements based on kinetics and protein conformation

 

作者 Haiyan YangChangchun HaoZhezhu NanRunguang Sun

School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China

 

 

 

摘要:Herein, the effects of bovine hemoglobin (BHb) binding to hydrophilic silica nanoparticles (SN1) and hydrophobic silica nanoparticles (SN2) were explored under physiological conditions. SEM and XRD were used to characterize silica nanoparticles (SNs). Zeta potential and DLS confirmed the formation of protein corona (PC), and SN2 showed more increase in their size after PC formation comparing with SN1. The adsorption isotherms were fitted well by the Freundlich model, and the kinetics tended to follow pseudo-second-order kinetics. Then, the second structure of BHb has been analyzed by UV–vis and FT-IR spectroscopy, which implied the impact of SN2 on the secondary structure of BHb was greater than that of SN1 on BHb. Moreover, fluorescence spectroscopy and Raman spectroscopy showed that SNs may induce heme degradation to form fluorescent heme product, resulting in increased fluorescence intensity. This investigation will be significant in exploring the toxicity profile of SNs for their in vivo.


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同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司 同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司
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