Results 261 to 270 of about 90,125 (307)
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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
Kurz CR +4 more
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Scavenging of photoenols by acids and bases
Tetrahedron Letters, 1992Abstract Photoenols generated by irradiation of ortho -methylacetophenone, ortho -methylbenzophenone and ortho -benzylbenzophenone are readily quenched by acids and bases. The rate constants for these reaction have been employing laser flash photolysis techniques.
J.C. Scaiano +2 more
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Uric acid as radical scavenger and antioxidant in the heart
Pfl�gers Archiv European Journal of Physiology, 1989Uric acid (UA) is released from the heart of many species, including man, and its site of formation has been shown to be the microvascular endothelium. Since UA reacts with oxygen radicals in vitro, experiments were conducted on guinea pig hearts perfused with Krebs-Henseleit buffer (KHB) to evaluate whether the formation of UA could afford protection ...
B F, Becker +4 more
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Scavenging the Water Cation in Concentrated Acidic Solutions
The Journal of Physical Chemistry A, 2015Picosecond pulse radiolysis techniques were used to observe the kinetics of the SO4(•-), H2PO4(•), Cl2(•-), and Br2(•-) species formed in the fast oxidation of concentrated and highly acidic solutions of SO4(2-), PO4(3-), Cl(-), and Br(-). Experimental results were compared with model predictions to gain insight into the possible mechanisms occurring ...
Jun, Ma +2 more
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Investigation of Sulfide Scavengers in Well Acidizing Fluids
SPE International Symposium on Formation Damage Control, 2000Abstract This paper describes the development of acidizing systems that use several different aldehyde-based sulfide suppression chemicals in conjunction with new acid corrosion inhibitors. Specific combinations of these chemicals have allowed the acid to dissolve FeS, suppress H2S and still enable the acid to be inhibited to industry ...
H. A. Nasr-El-Din +4 more
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A Reassessment of the Peroxynitrite Scavenging Activity of Uric Acid
Annals of the New York Academy of Sciences, 2002Abstract: Peroxynitrite is implicated in numerous human diseases. Hence, there is considerable interest in potential therapeutic peroxynitrite scavengers. It has been claimed that uric acid is a powerful peroxynitrite scavenger. We previously observed that uric acid is a powerful inhibitor of tyrosine nitration induced by peroxynitrite, but fails to ...
M, Whiteman +2 more
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Nasal Secretion of the Ozone Scavenger Uric Acid
American Review of Respiratory Disease, 1993Abstract Uric acid, an important scavenger of ozone, has been identified as the major low molecular weight antioxidant in baseline and cholinergically induced nasal secretions. The purpose of this study was to determine the specific tissue source of uric acid in airway secretions. The secretion of uric acid is increased by cholinergic
D B, Peden +5 more
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A Comprehensive Study of the Radical Scavenging Activity of Rosmarinic Acid
The Journal of Organic Chemistry, 2023Rosmarinic acid (RA) is reported in separate studies to be either an inducer or reliever of oxidative stress, and this contradiction has not been resolved. In this study, we present a comprehensive examination of the radical scavenging activity of RA using density functional theory calculations in comparison with experimental data.
Quan V. Vo +7 more
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Citric acid: A promising copper scavenger
Computational and Theoretical Chemistry, 2018Abstract In this investigation, the capacity of citric acid as copper scavenger is analyzed. For the copper scavenger capacity, the formation of the chelate complexes is studied using the Gibbs free energies. The chelates may be formed since the formation reactions are all exergonic.
Ana Martínez +2 more
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Scavenging of hypochlorous acid by carvedilol and ebselen in vitro
General Pharmacology: The Vascular System, 19971. The antihypertensive drug carvedilol and the antiinflammatory selenoorganic compound ebselen were tested for their ability to react with the reactive oxygen species hypochlorous acid (HOCl) in vitro. 2. Carvedilol scavenges HOCl at a rate sufficient to protect a model molecule catalase against inactivation by HOCl. 3.
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