Results 141 to 150 of about 4,999,106 (187)

Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant.

Dalton Transactions, 2012
The 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.
W. Koppenol, P. L. Bounds, T. Nauser, R. Kissner, H. Rüegger   +4 more
semanticscholar   +1 more source

Evaluation of Activation Volumes for the Conversion of Peroxynitrous to Nitric Acid

The Journal of Physical Chemistry A, 2003
Peroxynitrous acid, an inorganic toxin of biological importance, acts both as an oxidizing and a nitrating agent during its conversion to nitric acid. In discussions of the mechanism of this conversion, activation volumes have been invoked to distinguish between possible mechanisms, viz., homolysis of the O−O bond versus rotation via the N−O bond of ...
Chris F. Thomas, Rudi van Eldik, Willem H. Koppenol, Mohamed S. A. Hamsa, Reinhard Kissner   +4 more
openaire   +2 more sources

Observation of gas-phase peroxynitrous and peroxynitric acid during the photolysis of nitrate in acidified frozen solutions

Chemical Physics Letters, 2011
Abstract The photolysis of nitrate embedded in ice and snow can be a significant source of volatile nitrogen oxides affecting the composition of the planetary boundary layer. In this work, we examined the nitrogen oxides evolved from irradiated frozen solutions containing nitrate.
Otman Abida, L. H. Mielke, Hans D. Osthoff   +2 more
openaire   +2 more sources

Mechanistic studies on the reaction between cob(II)alamin and peroxynitrite: evidence for a dual role for cob(II)alamin as a scavenger of peroxynitrous acid and nitrogen dioxide.

Chemistry, 2011
Peroxynitrite/peroxynitrous acid (ONOO(-)/ONOOH; pK(a(ONOOH)) =6.8) is implicated in multiple chronic inflammatory and neurodegenerative diseases. Both mammalian B(12)-dependent enzymes are inactivated under oxidative stress conditions. We report studies
Riya Mukherjee, N. Brasch
semanticscholar   +1 more source

Kinetic studies on the reaction between cob(I)alamin and peroxynitrite: rapid oxidation of cob(I)alamin to cob(II)alamin by peroxynitrous acid.

Chemistry, 2011
There is currently much interest in the biochemical reactivity of peroxynitrite/peroxynitrous acid (ONOO / ONOOH; pKa(ONOOH) =6.8), [1] a strong oxidizing, hydroxylating and/or nitrating agent formed by the diffusion controlled reaction of nitric oxide ...
Riya Mukherjee, N. Brasch
semanticscholar   +1 more source

Identification and quantification of nitration and oxidation sites in extracellular matrix from human coronary artery smooth muscle cells treated with peroxynitrous acid (ONOOH)

Free Radical Biology & Medicine, 2022
Shuqi Xu, Christine Y Chuang, C. Hawkins, P. Hägglund, M. Davies   +4 more
semanticscholar   +1 more source

S-oxidation of thiazolidinedione with hydrogen peroxide, peroxynitrous acid, and C4a-hydroperoxyflavin: a theoretical study.

Journal of Physical Chemistry A, 2011
Quantum chemical analysis was carried out to model metabolism of glitazone class of drugs through oxygen transfer process to the sulfur atom of thiazolidinedione ring with different oxidants such as H(2)O(2), HOONO, and C4a-hydroperoxyflavin.
N. Taxak, Vinod Parmar, Dhilon S. Patel, A. Kotasthane, P. Bharatam   +4 more
semanticscholar   +1 more source

Theoretical Study on Raman Spectra of Aqueous Peroxynitric Acid

Chinese Journal of Chemical Physics, 2011
Using density functional theory and polarizable continuum models, we study the Raman spectra of aqueous peroxynitric acid. The calculated results indicate that the solvent effect has significant influence on the electric dipole transition moments between the ground and excited electronic state and Raman polarizabilities.
Qiang Shi, Wen-mei Wei, Ren-hui Zheng, Ya-ting Liu, Yong Ye, Jun-cheng Hu, Yuanyuan Jing   +6 more
openaire   +2 more sources

Mapping and quantification of damage and cross-links formed on fibronectin by peroxynitrous acid

Free Radical Biology & Medicine, 2021
Michele Mariotti, A. Rogowska-Wrzesińska, P. Hägglund, M. Davies   +3 more
semanticscholar   +1 more source

Phenotypic changes in human coronary artery smooth muscles cells cultured on peroxynitrous acid-modified extracellular matrix

Free Radical Biology & Medicine, 2021
Sara M. Jørgensen, Christine Y Chuang, M. Davies   +2 more
semanticscholar   +1 more source