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.

Free Radicals in Wheat Seeds Studied by Electron Spin Resonance

2002 ◽  
Vol 67 (6) ◽  
pp. 2079-2082 ◽  
Author(s):  
F. Szocs
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Wheat Seeds
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