Photolytic studies on 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl, a stable nitroxide free radical

1971 ◽  
Vol 36 (1) ◽  
pp. 209-211 ◽  
Author(s):  
John F. W. Keana ◽  
Robert J. Dinerstein ◽  
Friedhelm Baitis
Keyword(s):  
Free Radical ◽  
Nitroxide Free Radical ◽  
Stable Nitroxide

An experimental NEXAFS and computational TDDFT and ΔDFT study of the gas-phase core excitation spectra of nitroxide free radical TEMPO and its analogues

2016 ◽  
Vol 18 (15) ◽  
pp. 10207-10217 ◽  
Author(s):  
Ivan Ljubić ◽  
Antti Kivimäki ◽  
Marcello Coreno
Keyword(s):  
Free Radical ◽  
Gas Phase ◽  
Excitation Spectra ◽  
Core Excitation ◽  
The Core ◽  
Nitroxide Free Radical ◽  
Phase Spectra ◽  
Stable Nitroxide

Core excitation (NEXAFS) C 1s, N 1s, and O 1s gas-phase spectra of stable nitroxide free radical TEMPO and two of its amide-substituted analogues are assigned from the onset of the absorptions to the vicinity of the core-ionization thresholds using the theoretical TDDFT and ΔDFT methods.

Nitroxides. IX. Synthesis of nitroxide free radical α-amino acids

1982 ◽  
Vol 60 (12) ◽  
pp. 1448-1451 ◽  
Author(s):  
László Lex ◽  
Kálmán Hideg ◽  
H. Olga Hankovszky
Keyword(s):  
Amino Acids ◽  
Free Radical ◽  
Amino Acid ◽  
Propionic Acid ◽  
Nitroxide Free Radical ◽  
Stable Nitroxide

Three methods are described for preparation of a new stable nitroxide free radical amino acid, 2-amino-3-(1-oxyl-2,2,5,5-tetramethyl-3-pyrrolin-3-yl) propionic acid and its derivates. This amino acid may be used as a paramagnetic amino acid synthon in studies of peptides.

scholarly journals Desferrioxamine (Desferal) and superoxide free radicals. Formation of an enzyme-damaging nitroxide

1987 ◽  
Vol 246 (3) ◽  
pp. 725-729 ◽  
Author(s):  
M J Davies ◽  
R Donkor ◽  
C A Dunster ◽  
C A Gee ◽  
S Jonas ◽  
...  
Keyword(s):  
Free Radical ◽  
Room Temperature ◽  
Chelation Therapy ◽  
Iron Chelation ◽  
Protonated Form ◽  
Water Soluble ◽  
Iron Chelation Therapy ◽  
Superoxide Free Radical ◽  
Nitroxide Free Radical ◽  
Stable Nitroxide

In neutral solutions, desferrioxamine (Desferal) can react with the superoxide free radical, O2.- (possibly through its protonated form HO2.), to form a relatively stable nitroxide free radical, which can have a half-life of approx. 10 min at room temperature. The formation of the radical can be largely prevented by the presence of superoxide dismutase. The radical reacts rapidly with cysteine, methionine, glutathione, vitamin C and a water-soluble derivative of vitamin E. It also reacts rapidly with alcohol dehydrogenase, causing a loss of enzyme activity. The implications of these findings for mechanistic free-radical biochemistry and iron-chelation therapy could be considerable.

Synthesis, Equilibrium and Kinetic Properties of Gd3+ Complexes of Three DTPA-Bis(Amide) Derivatives Containing Stable Nitroxide Free Radical Substituents

2003 ◽  
Vol 2003 (19) ◽  
pp. 3601-3608 ◽  
Author(s):  
Zoltán Jászberényi ◽  
Ernő Brücher ◽  
József Jekő ◽  
Kálmán Hideg ◽  
Tamás Kálai ◽  
...  
Keyword(s):  
Free Radical ◽  
Kinetic Properties ◽  
Amide Derivatives ◽  
Nitroxide Free Radical ◽  
Stable Nitroxide

In VivoImaging of Nitroxide-Free-Radical Clearance in the Rat, Using Radiofrequency Longitudinally Detected ESR Imaging

1996 ◽  
Vol 113 (3) ◽  
pp. 256-261 ◽  
Author(s):  
I. Nicholson ◽  
M.A. Foster ◽  
F.J.L. Robb ◽  
J.M.S. Hutchison ◽  
D.J. Lurie
Keyword(s):  
Free Radical ◽  
Nitroxide Free Radical ◽  
Esr Imaging

A New Nematogn-Like Nitroxide Free Radical To Probe The Structure And Dynamics Of Nematic Liquid Crsytals

1976 ◽  
Vol 34 (2) ◽  
pp. 33-41 ◽  
Author(s):  
Andrew T. Pudzianowski ◽  
Arthur F Stiliman ◽  
Robert N. Schwartz ◽  
Barney L. Bales ◽  
Eric S. Lesin
Keyword(s):  
Free Radical ◽  
Structure And Dynamics ◽  
Nitroxide Free Radical
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