title: Oxidative stress and electron spin resonance.
abstract: The body constantly reacts with oxygen as part of the energy producing processes of cells. Oxidative stress is a dysbalance between the production of free radicals as products of these reactions and antioxidant properties of cells. The factors influencing the production of free radicals are physical agents, chemical agents and biological agents. Free radicals are paramagnetic molecules with short time-period for their detection by electron spin resonance (ESR) spectroscopy. The free radical stabilization can be gained by freezing a solution of an organic radical or bonding to spin trapping agents. The spin trapping agents are diamagnetic compounds which rapidly scavenge transient radicals to form stable paramagnetic spin adducts radicals. Because this secondary radical retains an unpaired electron, it can often be detected by electron spin resonance. From ESR spectra can be obtained structural information and kinetic information, information about the formation and decay of the radicals. To study the process of free radical generation is an important step towards reducing the deteriorating effects of oxidative stress.
authors.affiliation: Comenius University, School of Medicine, Institute of Pathology, Sasinkova 4, 811 08 Bratislava, Slovakia. martin.kopani@fmed.uniba.sk
authors.forename: Martin
authors.initials: M
authors.lastname: Kopáni
authors.forename: Peter
authors.initials: P
authors.lastname: Celec
authors.forename: Lubos
authors.initials: L
authors.lastname: Danisovic
authors.forename: Peter
authors.initials: P
authors.lastname: Michalka
authors.forename: Csaba
authors.initials: C
authors.lastname: Biró
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005609:Free Radicals / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D018384:Oxidative Stress; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D005609:Free Radicals