Stable free radicals. IX. Use of halogen nuclear quadrupole coupling in electron spin resonance spectra of imino nitroxides for determination of solvent effects on rotational correlation times

1970 ◽  
Vol 92 (24) ◽  
pp. 7210-7212 ◽  
Author(s):  
Edwin F. Ullman ◽  
Ludwig. Call
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Solvent Effects ◽  
Quadrupole Coupling ◽  
Spin Resonance ◽  
Rotational Correlation Times ◽  
Nuclear Quadrupole ◽  
Stable Free Radicals

Determination of free radicals in polymer films by electron spin resonance spectrometry

1983 ◽  
Vol 55 (9) ◽  
pp. 1520-1522 ◽  
Author(s):  
John L. Gerlock
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Polymer Films ◽  
Spin Resonance

Stable free radicals. V. Electron spin resonance studies of nitronylnitroxide radicals with asymmetric centers

1969 ◽  
Vol 91 (18) ◽  
pp. 5121-5124 ◽  
Author(s):  
Robert W. Kreilick ◽  
J. Becher ◽  
Edwin F. Ullman
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Stable Free Radicals

Electron spin resonance of stable free radicals

Physics Today ◽  
1965 ◽  
Vol 18 (7) ◽  
pp. 26-36 ◽  
Author(s):  
John Turkevich
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Stable Free Radicals

Notizen: Synthesis and Electron Spin Resonance Study of Spin-Labelled Compounds Related to Tumour- Growth Inhibitory Nitroarylaziridines

1976 ◽  
Vol 31 (5-6) ◽  
pp. 328-330 ◽  
Author(s):  
N. Dodd ◽  
R. Harcus ◽  
P. Preston
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Esr Spectroscopy ◽  
Tumour Growth ◽  
Electron Spin Resonance Study ◽  
Growth Inhibitory ◽  
Spin Resonance ◽  
Stable Free Radicals ◽  
Spin Resonance Study

Abstract Three stable free radicals have been prepared which are akin to 5-aziridino-2,4-dinitrobenzamide (CB 1954) ; these compounds all contain a nitroxide function. The metabolism and excretion of two such compounds in mice has been monitored by electron spin resonance (ESR) spectroscopy and compared with that of the simpler nitioxide, 4-keto-2,2,6,6-tetramethylpiperidino-1-oxyl (tempone).

scholarly journals Estimation of the Postmortem Duration of Mouse Tissue by Electron Spin Resonance Spectroscopy

2011 ◽  
Vol 2011 ◽  
pp. 1-11
Author(s):  
Shinobu Ito ◽  
Tomohisa Mori ◽  
Hideko Kanazawa ◽  
Toshiko Sawaguchi
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Trap ◽  
Detection Sensitivity ◽  
Mouse Tissue ◽  
Spin Adduct ◽  
Simple Method ◽  
Oxidation Stress ◽  
Spin Resonance

Electron spin resonance (ESR) method is a simple method for detecting various free radicals simultaneously and directly. However, ESR spin trap method is unsuited to analyze weak ESR signals in organs because of water-induced dielectric loss (WIDL). To minimize WIDL occurring in biotissues and to improve detection sensitivity to free radicals in tissues, ESR cuvette was modified and used with 5,5-dimethtyl-1-pyrroline N-oxide (DMPO). The tissue samples were mouse brain, hart, lung, liver, kidney, pancreas, muscle, skin, and whole blood, where various ESR spin adduct signals including DMPO-ascorbyl radical (AsA∗), DMPO-superoxide anion radical (OOH), and DMPO-hydrogen radical (H) signal were detected. Postmortem changes in DMPO-AsA∗and DMPO-OOH were observed in various tissues of mouse. The signal peak of spin adduct was monitored until the 205th day postmortem. DMPO-AsA∗in liver (y=113.8–40.7 log (day),R1=-0.779,R2=0.6,P<.001) was found to linearly decrease with the logarithm of postmortem duration days. Therefore, DMPO-AsA∗signal may be suitable for detecting an oxidation stress tracer from tissue in comparison with other spin adduct signal on ESR spin trap method.

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