نتایج جستجو برای: coadsorption of co o2

تعداد نتایج: 21197742  

Journal: :The Journal of General Physiology 1987
R Motais F Garcia-Romeu F Borgese

It has previously been shown that addition of catecholamines to a suspension of trout erythrocytes induces an enlargement of the cells owing to an uptake of NaCl mediated by a cAMP-dependent, amiloride-sensitive Na+/H+ exchange. In this article, we show that the change in cell volume induced by catecholamines is much greater when the erythrocytes are incubated in N2 than when they are in O2. Th...

2011
Ya-Huei Chin Corneliu Buda Matthew Neurock Enrique Iglesia

Rate measurements, density functional theory (DFT) within the framework of transition state theory, and ensemble-averaging methods are used to probe oxygen selectivities, defined as the reaction probability ratios for O reactions with CO and CH4, during CH4–O2 catalysis on Pt and Rh clusters. CO2 and H2O are the predominant products, but small amounts of CO form as chemisorbed oxygen atoms (O )...

Journal: :Nanoscale 2014
P Remith N Kalaiselvi

Novel lithium-rich layered Li(1.2)Mn(0.6)Ni(0.1)Co(0.1)O2 microspheres containing hierarchically arranged and interconnected nanostructures have been synthesized by a combination of template-free co-precipitation and solid-state methods. The in situ formed γ-MnO2 spherical template upon co-precipitation gets sacrificed during the course of solid-state fusion of cobalt, nickel and lithium precur...

Journal: :Journal of Physical Chemistry C 2021

Using density functional theory and an exchange–correlation that includes the van der Waals interaction, we study coadsorption of CO on Ru(0001) saturated with 0.5 ML oxygen. Different coexisting coverages are considered experimentally motivated, room temperature coverage consisting ML-O + 0.25 ML-CO (low coverage), saturation achieved at low temperatures (0.5 0.375 ML-CO, intermediate equally ...

Journal: :The journal of physical chemistry. B 2005
C M Kim C-W Yi D W Goodman

Infrared reflection absorption spectroscopy (IRAS) has been used to study CO-NO and CO-O(2) interactions on Cu(100) between 25 and 200 K. A strong repulsive interaction between CO and NO on Cu(100) at 25 K causes tilting of the CO molecules away from the surface normal and a blue-shift of the CO vibrational frequency. Upon warming and decomposition of the NO, the CO molecules return to a bondin...

1997
David T. Frayer

We present a general set of calculations describing the chemical evolution of young massive galaxies and predict the evolution of the CO, O2, and dust abundances as a function of age and metallicity. Over a wide range of input parameters, the models predict that (1) the total mass in gaseous metals peaks at early epochs (z ∼ 1− 3) when approximately half the total baryonic mass is in stars and ...

2016
Dianne J. Xiao Miguel I. Gonzalez Lucy E. Darago Konstantinos D. Vogiatzis Emmanuel Haldoupis Laura Gagliardi Jeffrey R. Long

The air-free reaction of CoCl2 with 1,3,5-tri(1H-1,2,3-triazol-5-yl)benzene (H3BTTri) in N,N-dimethylformamide (DMF) and methanol leads to the formation of Co-BTTri (Co3[(Co4Cl)3(BTTri)8]2·DMF), a sodalite-type metal-organic framework. Desolvation of this material generates coordinatively unsaturated low-spin cobalt(II) centers that exhibit a strong preference for binding O2 over N2, with isost...

Journal: :The Journal of clinical investigation 1992
S D Brown C A Piantadosi

Carbon monoxide (CO) may inhibit mitochondrial electron transport in the brain and increase the toxic effects of the gas. This hypothesis was investigated in anesthetized rats during CO exposure and recovery at either normobaric or hyperbaric O2 concentrations. During exposure and recovery, we measured the oxidation level of cerebrocortical cytochrome c oxidase by differential spectroscopy and ...

Journal: :The Journal of clinical investigation 1973
C E Cross H Gong C J Kurpershoek J R Gillespie R W Hyde

We measured simultaneously, by single breath methods, pulmonary capillary blood flow (Q(c)), carbon monoxide diffusing capacity (DL(CO)), and isotopic oxygen ((18)O(18)O) diffusing capacity (DL(18) (O2)) in five normal males during conditions of rest and moderate exercise at mixed venous O(2) tensions (PO(2) 33-44 mm Hg). During moderate exercise at a work load of 100 W. pulmonary capillary blo...

Journal: :Circulation research 2009
Brian D Lamon Frank F Zhang Nitin Puri Sergey V Brodsky Michael S Goligorsky Alberto Nasjletti

RATIONALE Vascular tissues produce carbon monoxide (CO) via HO-dependent and HO-independent mechanisms; the former in tandem with biliverdin and iron and the latter as a lone product. CO has been shown to function as both a vasoconstrictor and vasodilator; however, factors that dictate the vasoregulatory phenotype of this gas are unknown. OBJECTIVE We investigated whether CO-mediated vasocons...

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