Results 101 to 110 of about 1,846 (182)
Internal rotation in peroxynitrous acid (ONOOH)
The Journal of Chemical Physics, 2005 Using higher levels of wave-function-based electronic structure theory than previously applied, as well as density functional theory (B-LYP and B3-LYP functionals), all theoretical models conclude that three ONOOH conformers are stationary point minima, in disagreement with some of the previous studies that we survey.
Mark P. McGrath, F. S. Rowland
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Chemiluminescence characterisation of the reaction system Tb(III)–amino acid–peroxynitrous acid
Journal of Alloys and Compounds, 2007 Abstract Chemiluminescence of the reaction system tryptophan–hydrogen peroxide–nitrite–Tb(III)–H2SO4 was used for the determination of tryptophan. The chemiluminescence intensity observed in the system tryptophan–hydrogen peroxide–nitrite–sulfuric acid, in the presence of Tb(III) ions was five times higher than that in a solution without Tb(III) ions.
Małgorzata Kaczmarek, Stefan Lis
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Kinetic study of Orange II oxidation using peroxynitrous acid
Journal of Physical Organic Chemistry, 2009 AbstractThe reaction of Orange II with peroxynitrous acid has been studied by a spectrophotometrical method. The reaction rate is complex because the order changes from zero to one in function of substrate and oxidant concentration. The influence of pH and ionic strength has been investigated, but their effect on the reaction rate appears to be ...
F. J. Poblete +2 more
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Kinetic Footprinting of an RNA-Folding Pathway Using Peroxynitrous Acid
Angewandte Chemie International Edition, 2000 Following footprints to discover a path is easier with peroxynitrous acid. The folding of the Tetrahymena ribozyme was studied using this readily available reagent to generate hydroxyl radicals for kinetic footprinting studies. The different domains of the ribozyme appear to assemble at different rates following an ordered, hierarchical pathway (see ...
Steven G. Chaulk, Andrew M. MacMillan
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Peroxynitrous-acid-induced chemiluminescence detection of nitrite based on Microfluidic chip
Talanta, 2016 A chemiluminescent method for nitrite detection was developed on microfluidic chip. Carbon dots-NaNO2(-) acidified H2O2 system was adopted. Chemiluminescence (CL) spectrum of this system was detected. The radiative recombination of hole-injected and electron-injected carbon dots explained their CL property.
Jing Wu +4 more
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Peroxynitric acid inhibits amyloid β aggregation
Biochemical and Biophysical Research Communications, 2023Peroxynitric acid (PNA), a reactive oxygen nitrogen species, has attracted attention in life science because of its unique properties such as high bacteriacidal activity. Since the bactericidal activity of PNA could be related to its reaction with amino acid residues, we speculate that PNA can be used for protein modifications.
Haruka Kawabe +3 more
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Protonation study of peroxynitric acid and peroxynitrous acid
The Journal of Chemical Physics, 2004The equilibrium structures and harmonic vibrational frequencies of peroxynitric acid (HOONO2) and seven structures of protonated peroxynitric acid, along with peroxynitrous acid (HOONO) and its 12 protonated peroxynitrous acid structures, have been investigated using several ab initio and density functional methods. The ab initio methods include second-
Randy L, Santiano, Joseph S, Francisco
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Photon-Initiated Homolysis of Peroxynitrous Acid
Inorganic Chemistry, 2009Laser flash photolysis of ONOOH at 355 nm and a pH of 4.0-5.5 causes homolysis of ONOOH nearly exclusively at the N-O bond rather than at the O-O bond (HO(2)(*)/HO(*) > 25:1). All of the NO(*) and HO(2)(*) radicals formed by photolysis subsequently recombine with a rate constant of (1.2 +/- 0.2) x 10(10) M(-1) s(-1) via second-order kinetics, as ...
Manuel, Sturzbecher-Höhne +3 more
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Rapid scavenging of peroxynitrous acid by monohydroascorbate
Free Radical Biology and Medicine, 2003The reaction of peroxynitrous acid with monohydroascorbate, over the concentration range of 250 microM to 50 mM of monohydroascorbate at pH 5.8 and at 25 degrees C, was reinvestigated and the rate constant of the reaction found to be much higher than reported earlier (Bartlett, D.; Church, D. F.; Bounds, P. L.; Koppenol, W. H. The kinetics of oxidation
Christophe R, Kurz +4 more
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Kinetics Analysis of the Reactions between Peroxynitric Acid and Amino Acids
Chemical Research in Toxicology, 2020Plasma disinfection using low-temperature atmospheric pressure plasma is widely studied in many applications, and the use of plasma-treated water (PTW) for disinfection is being developed by many researchers. Exposing plasma to water supplies and preserves reactive oxygen and nitrogen species (RONS) in the water, and this PTW exhibits bactericidal ...
Takashi Yokoyama +4 more
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