Quantified Maximum Entropy and Biological EPR Spectra
This work describes the use of a quantified maximum entropy method for the optimisation of analytical information from EPR spectra using both single and composite point spread functions. Quantified maximum entropy reconstruction of the complex multiline EPR spectrum of the perinaphthyl radical allows the accurate determination of the 2 hyperfine splittings. The approach is then used on a system involving unknown radical species formed by crushing lettuce in the presence of a spin trap. This reconstruction reveals the presence of at least 2 radicals and the parameters derived suggest that one of them is a hydroxyl radical adduct — a result not obtainable by direct inspection.
KeywordsElectron Paramagnetic Resonance Electron Paramagnetic Resonance Spectrum Point Spread Function Electron Paramagnetic Resonance Spectroscopy Spin Trap
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