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Generation of radical anions during NADPH reduction of four mutagenic and genotoxic α-nitroarenofurans was examined. ESR showed that free radicals were generated during reduction solely in the presence of light. Computer simulations of ESR spectra were in good agreement with the experimental ones.
The rate constant for the reaction of NO with ·O 2 − was determined to be (6.7 ± 0.9) × 10 9 1 mol −1 s −1 , considerably higher than previously reported. Rate measurements were made from pH 5.6 to 12.5 both by monitoring the loss of ·O 2 − and the formation of the product − OONO....
This study was undertaken to compare, on a kinetic basis, the antioxidant efficiency of an ubiquinol homologue having a short isoprenoid side-chain length, such as ubiquinol-3, with that of the long chain ubiquinol-7, by determining their rate constants of inhibition with respect to...
EPR characterization of the short-lived free radicals generated by pulsed UV laser ablation of biological samples has been investigated using a spin trap method. The obtained EPR spectra suggest that the trapped short-lived free radicals generated by excimer laser ablation of collagen and...
The time course and nature of the pulmonary inflammatory and antioxidant responses, both during and after hyperoxic-induced acute lung injury were studied in the preterm guinea pig. Three-day preterm (65 days gestation) guinea pigs were randomly exposed to either 21% O 2 (control) or 95% O 2...
It is well known that oxygen enhances Che relaxation of free radical EPR probes through spin lattice and Heisenberg spin-spin interactions with consequent effect on the line height and width. The two relaxation processes have opposing effects on the signal heights and depend on the concentration...
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