title: Whole rat electron paramagnetic resonance imaging of a nitroxide free radical by a radio frequency (280 MHz) spectrometer.
abstract: Low frequency (280 MHz) electron paramagnetic resonance spectroscopy has been used to follow uptake, distribution and reduction of the nitroxyl spin label PCA in the rat. No difference of half life was found in seven rats submitted to three administrations of PCA (11.3 +/- 0.4; 11.0 +/- 0.6 and 11.5 +/- 0.7 min). Transversal two-dimensional images of PCA distribution in the rat body were obtained over 6 min by means of field gradients. PCA was observed in three regions by projections along the longitudinal axis of the rat. PCA accumulation was found in the lower abdomen 12 min after the start of the PCA injection.
authors.affiliation: Dipartimento di Scienze e Tecnologie Biomediche, Università dell'Aquila, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Quaresima
authors.forename: M
authors.initials: M
authors.lastname: Alecci
authors.forename: M
authors.initials: M
authors.lastname: Ferrari
authors.forename: A
authors.initials: A
authors.lastname: Sotgiu
mesh_terms: D000818:Animals; D015764:Bepridil / Q000031:analogs & derivatives; D001713:Biphenyl Compounds; D003497:Cyclic N-Oxides; D003952:Diagnostic Imaging / Q000379:methods*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D007839:Functional Laterality; D007275:Injections, Intravenous; D010851:Picrates; D011846:Radio Waves; D051381:Rats; D011919:Rats, Inbred Strains; D013057:Spectrum Analysis; D013113:Spin Labels
chemical_list: D001713:Biphenyl Compounds; D003497:Cyclic N-Oxides; D010851:Picrates; D013113:Spin Labels; C032289:2,2,5,5-tetramethyl-1-pyrrolidinyloxy-3-carboxylic acid; D015764:Bepridil; C004931:1,1-diphenyl-2-picrylhydrazyl