Chemical investigation of a Red Sea Spongia sp. led to the isolation of four new compounds, i.e., 17-dehydroxysponalactone (1), a carboxylic acid, spongiafuranic acid A (2), one hydroxamic acid, spongiafuranohydroxamic acid A (3), and a furanyl ...
Chi-Jen Tai +8 more
doaj +1 more source
Generation of superoxide and singlet oxygen from α-tocopherolquinone and analogues. [PDF]
Three potential routes to generation of reactive oxygen species from a tocopherolquinone have been identified. The quinone of the water-soluble vitamin E analogue Trolox C (Trol-Q) is reduced by hydrated electron and isopropanol a hydroxyalkyl radical ...
Bisby, RH +4 more
core +1 more source
It is tempting to speculate that increased vasoconstriction and loss of endothelium-dependent vasodilation might be etiological factors of elevated blood pressure in the insulin-resistant state.
Kazuya Shinozaki +4 more
doaj +1 more source
One-electron oxidation and reduction of glycosaminoglycan chloramides: a kinetic study. [PDF]
Hypochlorous acid and its acid-base counterpart, hypochlorite ions, produced under inflammatory conditions, may produce chloramides of glycosaminoglycans, these being significant components of the extracellular matrix (ECM).
A.W.J. Paterson +67 more
core +1 more source
Ovariectomy increases the participation of hyperpolarizing mechanisms in the relaxation of rat aorta. [PDF]
This study examines the downstream NO release pathway and the contribution of different vasodilator mediators in the acetylcholine-induced response in rat aorta 5-months after the loss of ovarian function.
Ana Sagredo +6 more
doaj +1 more source
Vibronic coupling in the superoxide anion: The vibrational dependence of the photoelectron angular distribution [PDF]
We present a comprehensive photoelectron imaging study of the O₂(X³Σg⁻,v′=0–6)←O₂⁻(X²Πg,v′′=0) and O₂(a¹Δg,v′=0–4)←O₂⁻(X²Πg,v′′=0)photodetachment bands at wavelengths between 900 and 455 nm, examining the effect of vibronic coupling on the photoelectron ...
Cavanagh, Steven J. +9 more
core +1 more source
Superoxide reductase from Giardia intestinalis: structural characterization of the first sor from a eukaryotic organism shows an iron centre that is highly sensitive to photoreduction [PDF]
Superoxide reductase (SOR), which is commonly found in prokaryotic organisms, affords protection from oxidative stress by reducing the superoxide anion to hydrogen peroxide.
Bandeiras, Tiago M. +8 more
core +2 more sources
New hydrophobic derivatives of cinnamic and hydroxycinnamic (ferulic and cumaric) acids obtained by chemical esterification of the carboxylic group with C10 linear alcohol were studied to evaluate their antioxidant capacity toward the superoxide anion ...
Diego Romano Perinelli +5 more
doaj +1 more source
Oxidative stress parameters in plasma of Huntington's disease patients, asymptomatic Huntington's disease gene carriers and healthy subjects : a cross-sectional study [PDF]
BACKGROUND : Animal data and postmortem studies suggest a role of oxidative stress in the Huntington's disease (HD), but in vivo human studies have been scarce.
Babić, Tomislav +5 more
core +1 more source
Antioxidant and radical scavenging activities of some norcantharidin and bridged perhydroisoindole derivatives [PDF]
A series of norcantharidin and bridged perhydroisoindole derivatives were evaluated for their antioxidant and radical scavenging activities. Different in vitro methodologies such as total reducing power, 1,1-diphenyl-2- picrylhydrazil (DPPH•) free ...
Peksel Aysegul +3 more
doaj +1 more source

