Nanotechnologies. Electron spin resonance (ESR) as a method for measuring reactive oxygen species (ROS) generated by metal oxide nanomaterials

2017 ◽  
Keyword(s):  
Reactive Oxygen Species ◽  
Electron Spin Resonance ◽  
Metal Oxide ◽  
Electron Spin ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Spin Resonance ◽  
Metal Oxide Nanomaterials

Exploring environment-dependent effects of Pd nanostructures on reactive oxygen species (ROS) using electron spin resonance (ESR) technique: implications for biomedical applications

2015 ◽  
Vol 17 (38) ◽  
pp. 24937-24943 ◽  
Author(s):  
Tao Wen ◽  
Weiwei He ◽  
Yu Chong ◽  
Yi Liu ◽  
Jun-Jie Yin ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Electron Spin Resonance ◽  
Singlet Oxygen ◽  
Electron Spin ◽  
Biomedical Applications ◽  
Reactive Oxygen ◽  
Dependent Manner ◽  
Oxygen Species ◽  
Spin Resonance ◽  
Ph Dependent

Pd nanostructures can promote the decomposition of H2O2 in a pH-dependent manner and scavenge superoxide and singlet oxygen.

Characterization by Electron Spin Resonance Spectroscopy of Reactive Oxygen Species Generated by Titanium Dioxide and Hydrogen Peroxide

2005 ◽  
Vol 84 (2) ◽  
pp. 178-182 ◽  
Author(s):  
M.-C. Lee ◽  
F. Yoshino ◽  
H. Shoji ◽  
S. Takahashi ◽  
K. Todoki ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Titanium Dioxide ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Reactive Oxygen ◽  
Titanium Implants ◽  
Spin Adduct ◽  
Oxygen Species ◽  
Spin Concentration ◽  
Spin Resonance

The influence of reactive oxygen species (ROS) on the surface modification of titanium implants and osseointegration is unclear. The aim of this study was to evaluate the ability of titanium dioxide (TiO2) to generate ROS in the presence of H2O2 and to determine whether any ROS thus generated play a role in osseointegration, as measured by electron spin resonance (ESR) spin-trapping with 5,5-dimethyl-1-pyrolline- N-oxide (DMPO). We demonstrate that TiO2 together with H2O2 generated hydroxyl radicals (HO•), as shown by a time-dependent increase in the spin concentration of the ESR signal for the DMPO-OH spin adduct, indicating HO• generation. Interestingly, irradiated TiO2 with H2O2 generated the superoxide (O2•-), as shown by an increase in the spin concentration of the signal for the DMPO-OOH spin adduct, indicating O2•- generation during the period of irradiation (0–5 min). These results suggest that ROS generated from the TiO2 layer may be involved in creating appropriate conditions for the osseointegration of dental implants into alveolar bone tissues.

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