Detection of the formyl radical by EPR spin-trapping and mass spectrometry
نویسندگان
چکیده
منابع مشابه
The structure of free radical metabolites detected by EPR spin trapping and mass spectroscopy from halocarbons in rat liver microsomes.
Electron impact (EI) tandem mass spectrometry (MS/MS) combined with EPR spin trapping was used to detect and identify the free radical metabolites of various halocarbons in rat liver microsomal dispersions. EPR spectra of the spin adducts of radical metabolites derived from fluorine-containing halocarbons display fluorine hyperfine splitting, which can be used as proof for the identification of...
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The spontaneous addition of air oxygen to a dienolic compound, yielding a cyclic peroxide, was followed by spin trapping (ST) combined with EPR spectroscopy and mass spectrometry (MS). Using two different nitrones, the ST/EPR study allowed the detection of the spin adduct of a radical intermediate, and the radical centre in the addend was identified after similar experiments performed with two ...
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The electron paramagnetic resonance technique of spin trapping was employed to study the interaction of hydroxyl radicals with carnosine and related His-containing dipeptides. His and His-containing dipeptides were able to quench 49.1-94.996 of hydroxyl radicals produced by Fez+ and HzOz. The hydroxyl radical scavenging activity of dipeptides was in the order @-Ala < yaminobutyric acid (GABA) <...
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ion and subsequent deprotonation gives rise to phenoxy radicals, which play a pivotal role in lignin chemistry. Overall spin trapping systems could be powerful tools to understand the radical intermediates involved in lignin chemistry. In Table 4 our data on spin trap experiments with DIPPMPO and different phenols are shown. There are different oxidation systems for the generation of phenoxy ra...
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The radical intermediates formed upon UVA irradiation of titanium dioxide suspensions in aqueous and non-aqueous environments were investigated applying the EPR spin trapping technique. The results showed that the generation of reactive species and their consecutive reactions are influenced by the solvent properties (e.g., polarity, solubility of molecular oxygen, rate constant for the reaction...
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ژورنال
عنوان ژورنال: Free Radical Biology and Medicine
سال: 2018
ISSN: 0891-5849
DOI: 10.1016/j.freeradbiomed.2018.01.002