Results 111 to 120 of about 1,846 (182)
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Ion-exchange chromatographic analysis of peroxynitric acid
Journal of Chromatography A, 2016Ion-exchange chromatographic analysis of peroxynitric acid (O2NOOH) was performed by combining an acidic eluate with an UV-vis detector and immersing the separation column in an ice-water bath. The decomposition behavior of peroxynitric acid in the solution was also studied using this system.
Yoichi Nakashima +3 more
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Degradation of extracellular matrix by peroxynitrite/peroxynitrous acid
Free Radical Biology and Medicine, 2008The extracellular matrix (ECM) provides strength and elasticity to tissues and plays a key role in regulating cell behavior; damage to this material is believed to be a major factor in many inflammatory diseases. Peroxynitrite/peroxynitrous acid, which is generated at elevated levels at sites of inflammation, is believed to play a role in ECM damage ...
Eleanor C, Kennett, Michael J, Davies
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Hydroxyl Radical Formation during Peroxynitrous Acid Decomposition
Journal of the American Chemical Society, 1999Yields of O2 formed during decomposition of peroxynitrous acid (ONOOH) under widely varying medium conditions are compared to predictions based upon the assumption that the reaction involves formation of discrete •OH and •NO2 radicals as oxidizing intermediates.
John W. Coddington +2 more
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Spectroscopic Characterization of Peroxynitrous Acid in cis-perp Configurations
The Journal of Physical Chemistry A, 2006This paper presents experimental evidence, supported by two-dimensional theoretical calculations, that HOONO can be observed in cis-perp (cp) configurations in a pulsed supersonic expansion. The spectral properties (transition frequency, rotational constants, and transition type) of OH overtone transitions originating from a state with predominately cp
Eunice X J, Li +3 more
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Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant
Dalton Transactions, 2012The isomerisation of ONOOH to NO(3)(-) and H(+), some oxidations and all hydroxylations and nitrations of aromatic compounds are first-order in ONOOH and zero-order in the compounds that are modified. These reactions are widely believed to proceed via homolysis of ONOOH into HO˙ and NO(2)˙ to an extent of ca. 30%.
Willem H, Koppenol +4 more
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Free radical yields from the homolysis of peroxynitrous acid
Free Radical Biology and Medicine, 1992A recent study reports discordant results for maximal free-radical yields from the decomposition of peroxynitrous acid using different assay reagents and a puzzling decrease (to zero) of the radical yields with increasing pH. An assay method using 2,2,'azino-bis(3-ethyl-benzthiazoline sulphonate) (ABTS) has been tested using stopped-flow kinetic ...
G, Yang +7 more
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Significance of peroxynitric acid in atmospheric chemistry of nitrogen oxides
Nature, 1977KNOWLEDGE of the life cycle and budget of nitrogen oxides in the atmosphere is important for several reasons. In the stratosphere, NO and NO2 (NOX) play a dominant part in maintaining the structure and stability of the ozone distribution. In the troposphere, NOX is involved in the production and destruction of OH radicals which control the fluxes of ...
R. A. Cox +2 more
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Infrared overtone spectroscopy and unimolecular decay dynamics of peroxynitrous acid
The Journal of Chemical Physics, 2005Peroxynitrous acid (HOONO) is generated in a pulsed supersonic expansion through recombination of photolytically generated OH and NO2 radicals. A rotationally resolved infrared action spectrum of HOONO is obtained in the OH overtone region at 6971.351(4)cm−1 (origin), providing definitive spectroscopic identification of the trans-perp (tp) conformer of
Ian M, Konen +5 more
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Formation and decay of peroxynitric acid: a pulse radiolysis study
The Journal of Physical Chemistry, 1993Peroxynitrous acid and peroxynitrite anion have been studied using pulse radiolysis of nitrite and nitrate solutions. The formation rate constant is determined to be k(OH+NO 2 )=(4.5±1.0)×10 9 M -1 s -1 , and the rate constant for the OH radical reaction with nitrite is determined to be k(OH+NO 2 - )= (6.0±1.0)×10 9 M -1 s -1 .
T. Loegager, K. Sehested
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Kinetics Evidence for a Complex Between Peroxynitrous Acid and Titanium(IV).
ChemInform, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Patrick K, Wick +2 more
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