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| Titel: |
Effect of pH on superoxide/hydroperoxyl radical trapping by nitrones: an EPR/kinetic study |
| Auteur: |
Allouch, A. Lauricella, R. P. Tuccio, B. N. |
| Verschenen in: |
Molecular physics |
| Paginering: | Jaargang 105 (2007) nr. 15-16 pagina's 2017-2024 |
| Jaar: |
2007-08 |
| Inhoud: |
The pH dependence of the apparent rate constant kTap for [image omitted] trapping by four nitrones was examined. In each case, kinetic curves were obtained after treatment of EPR spectra of the spin adduct formed using both singular value decomposition and pseudo-inverse deconvolution methods. Modelling these curves led to evaluate kTap at various pH values. Analysis of the pH dependence of kTap permitted the determination of the rate constants for the spin trapping of [image omitted] and of [image omitted] separately. Whatever the nitrone, our results clearly show that the EPR signals of the nitrone/superoxide spin adducts observed in aqueous media were essentially due to the trapping of the protonated species [image omitted] |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 20 gevonden artikelen
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