Results 11 to 20 of about 1,172,237 (299)

Chemodivergent transformations of amides using gem-diborylalkanes as pro-nucleophiles

open access: yesNature Communications, 2020
Amides are versatile synthetic building blocks, however the general stability of the amide bond makes its selective transformation challenging. Here, the authors report a chemodivergent transformation of primary, secondary and tertiary amides by using 1 ...
Wei Sun   +5 more
doaj   +1 more source

Sequential Extraction Analysis of Arsenic in Soil Samples Collected in an Agricultural Area of Brindisi, Apulia (Italy), in the Proximity of a Coal-Burning Power Plant

open access: yesApplied Sciences, 2021
In order to evaluate the local environmental risk deriving from coal transport and burning, 30 soil samples were collected along the coal conveyor belt and around the coal-burning power plant Federico II of Brindisi (Apulia, southern Italy).
Danilo Migoni   +3 more
doaj   +1 more source

Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure: Part 2: Catalytic oxidation of carbon monoxide [PDF]

open access: yes, 1984
The catalytic properties of mixed oxides with the fluorite or pyrochlore structure were investigated using CO oxidation. The presence of ions with a variable valence state, the size of the ions and especially the extent of pyrochlore ordering affect ...
Bosch, H.   +6 more
core   +13 more sources

Redox viscometry of some Fe-bearing silicate melts [PDF]

open access: yes, 1991
The dependence of shear viscosity on the oxidation state of six ferrosilicate melts has been measured using the concentric cylinder method and a gas mixing furnace.
Dingwell, Donald B.
core   +1 more source

Community- and genome-based evidence for a shaping influence of redox potential on bacterial protein evolution

open access: yesmSystems, 2023
Despite deep interest in how environments shape microbial communities, whether redox conditions influence the sequence composition of genomes is not well known.
Jeffrey M. Dick, Delong Meng
doaj   +1 more source

Control of oxidation and spin state in a single-molecule junction [PDF]

open access: yes, 2018
The oxidation and spin state of a metal–organic molecule determine its chemical reactivity and magnetic properties. Here, we demonstrate the reversible control of the oxidation and spin state in a single Fe porphyrin molecule in the force field of the ...
Braun, Lukas   +6 more
core   +3 more sources

Effect of Water Chemistry on Zeta Potential of Air Bubbles

open access: yesInternational Journal of Electrochemical Science, 2013
Effects of various factors on zeta potential of air bubbles in aqueous solution were studied. It was found that the water pH, surfactants types and concentration, and water temperature had significant roles on the zeta potential of air bubbles.
Weihong Jia, Sili Ren, Bin Hu
doaj   +1 more source

Effect of doping TiO2 with alkaline-earth metal ions on its photocatalytic activity [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
TiO2 photocatalysts doped with alkaline-earth metal ions were prepared by the impregnation and coprecipitation methods. The sample were characterized by XRD, XPS and IR spectroscopy.
Li Yuexiang   +4 more
doaj   +1 more source

Local Structure and Magnetism of LiFeSi0.01P0.99O4/C as a Cathode Material on Lithium-Ion Battery

open access: yesJournal of Magnetism and Its Applications, 2021
The oxidation state and local structure of LiFeSi0.01P0.99O4/C composites as a cathode on lithium-ion battery were investigated by Fe K-edge X-ray Absorption Near Edge Spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS). The LiFeSi0.
Vera Laviara Maghfirohtuzzoimah   +7 more
doaj   +1 more source

FERROCENYL ALKYLAMMONIUM N-SUBSTITUTED POLYPYRROLE CONTAINING Pt AND Pd AND ITS APPLICATION ON ELECTROANALYSIS OF ARSENITE [PDF]

open access: yes, 2016
Indexación: Web of Science; Scopus; Scielo.Arsenic occurs in a variety of forms and oxidation states and is a very toxic element. The main inorganic arsenic species present in natural waters are arsenate (oxidation state V) and arsenite ions (oxidation ...
Moutet, JC   +3 more
core   +1 more source

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