Results 221 to 230 of about 126,616 (265)

Interactions of oxidant stress and vascular reactivity

American Journal of Physiology-Lung Cellular and Molecular Physiology, 1991
Oxidants have complex effects on pulmonary vascular reactivity. They can stimulate production of vasoconstrictor arachidonate mediators and can also cause vasodilation through activation of guanylate cyclase. Oxidants can also inactivate vasomotor phenomenon by interfering with mechanisms of signal transduction or smooth muscle contraction.
G H, Gurtner, T, Burke-Wolin
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Selective Reactivity and Oxidation of Dissolved Organic Matter by Manganese Oxides

Environmental Science & Technology, 2021
Dissolved organic matter (DOM) varies widely across natural and engineered systems, but little is known about the influence of DOM composition on its reactivity with manganese oxides. Here, we investigate bulk and molecular transformations of 30 diverse DOM samples after reaction with acid birnessite (MnO2), a strong oxidant that may react with DOM in ...
Emma L. Trainer, Matthew Ginder-Vogel, Christina K. Remucal   +2 more
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Reactive Shell Model for Boron Oxidation

The Journal of Physical Chemistry C, 2019
An approach suitable for quantitative description of oxidation of porous powders with a complex particle morphology is developed and applied for a 95% pure boron powder.
Yalun Sun, Kerri-Lee Chintersingh, Mirko Schoenitz, Edward L. Dreizin   +3 more
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NITRIC OXIDE AND VASCULAR REACTIVITY IN SEPSIS

Shock, 2008
Sepsis and septic shock are major causes of morbidity and mortality in critically ill patients. Sepsis and septic shock induce a profound fall in the peripheral vascular tone. NO has been implicated as a key player in vascular changes of sepsis and septic shock.
Daniel, Fernandes, Jamil, Assreuy
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Reactive Oxygen Species and Oxidative Stress

2011
Oxidative stress defined as an excessive production of reactive oxygen species (ROS) surpassing existing antioxidative defense mechanisms plays a critical role in the development and progression of diabetic vascular complications including nephropathy.
Hyunjin, Noh, Hunjoo, Ha
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Characterization and reactivity of group III oxides supported on niobium oxide

Catalysis Today, 2003
A series of group III oxides supported on niobia were prepared by incipient wetness impregnation. The bulk and surface composition of the samples as well as their structural and textural features were determined by chemical analysis, nitrogen adsorption, XRD, TG-DSC and XPS measurements.
A. L. Petre, J. A. Perdigon Melon, A. Gervasini, A. Auroux   +3 more
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Nanoscale oxidation of Cu(100): Oxide morphology and surface reactivity

The Journal of Chemical Physics, 2007
Surface oxidation of Cu(100) in O2 has been investigated in situ by x-ray photoelectron spectroscopy, x-ray induced Auger electron spectroscopy (XAES), and scanning tunneling microscopy (STM) as a function of surface temperature (TS=303–423K) and O2 pressure (pO2=3.7×10−2–213mbars).
M, Lampimäki, K, Lahtonen, M, Hirsimäki, M, Valden   +3 more
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Oxidation and reactivity of nitrogen- and phosphorus-doped heterofullerenes

Physical Chemistry Chemical Physics, 2008
Density functional theory (DFT) calculations suggest significantly different oxidation behaviour for phosphorus-doped heterofullerenes compared to their pure and nitrogen-doped counterparts, due to formation of a phosphene oxide. This oxide is not thermally labile, suggesting stable phosphofullerenes are likely to be C(59)POH and (C(59)PO)(2).
Ewels, Christopher, El Cheikh, H., Suarez-Martinez, I., van Lier, G.   +3 more
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POSSIBLE REACTIVE INTERMEDIATES IN THE OXIDATIVE BIOTRANSFORMATION OF HEXACHLOROBENZENE

Drug Metabolism and Drug Interactions, 1989
In this review the biotransformation of hexachlorobenzene is discussed, with special reference to the possible generation of reactive metabolites or intermediates during this process. Evidence is presented for the direct involvement of certain cytochrome P-450 isoenzymes in the major toxic effect of hexachlorobenzene, hepatic porphyria.
Ommen, B. van, Bladeren, P.J. van
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The Reactivity of Oxide Surfaces

1958
Publisher Summary This chapter discusses some of the experimental evidence showing, the use of isotopes, how lattice oxygen itself takes part in the chemisorption step and often in catalytic reactions involving oxygen-containing gases including studies of isotopic exchange in the reactions of O2, CO, and CO2 with a number of metallic oxides, together
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