Results 21 to 30 of about 558,651 (312)
Thermal oxidation kinetics of additive free polyamide 6-6 [PDF]
, 2013 Thermal aging of an additive free PA 6-6 has been elucidated at 90, 100, 120, 140, 150 and 160 C in airventiled ovens by Fourier transform infrared spectrophotometry, viscosimetry in molten state and uniaxial tensile testing.
BEN HASSINE, Mouna +3 more
core +1 more source
Nature Communications, 2019 Bridging homogeneous and heterogeneous catalysis is a long-term pursuit in the field of catalysis. Here, the authors present results on integration of nano- and molecular catalysis via catalytic synthesis of nitrogen doped carbon layers on AlOx supported
Yajuan Wu +5 more
doaj +1 more source
Oxidation of cellulose in pressurized carbon dioxide [PDF]
, 2009 This work presents first results upon oxidation of type II cellulose by nitrogen dioxide dissolved in carbon dioxide at high pressure. This reaction leads to oxidized cellulose, a natural-based bioresorbable fabric used for biomedical applications.
Montanari, Suzelei +4 more
core +1 more source
Iodine-catalyzed diazo activation to access radical reactivity
Nature Communications, 2018 Radical reactivity of diazo compounds, useful organic building blocks, is yet underexplored. Here, the authors report an iodine-catalyzed radical activation of diazo compounds affording a variety of substituted cyclopropanes, pyrroles and epoxides under ...
Pan Li +5 more
doaj +1 more source
Effect of doping TiO2 with alkaline-earth metal ions on its photocatalytic activity [PDF]
Journal 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
Beilstein Journal of Nanotechnology, 2022 In this study, we present theoretical X-ray absorption near-edge structure (XANES) spectra at the K-edge of oxygen in zirconia containing Ni dopant atoms and O vacancies at varying concentrations.
Dick Hartmann Douma +6 more
doaj +1 more source
The dn Number in Transition Metal Chemistry: Its Utility and Limitations
Chemistry, 2023 The dn number or configuration is a very useful parameter in transition metal chemistry because it conveys information about the expected properties of a d-block metal complex, including its shape, magnetism, thermodynamic stability, kinetic lability ...
Nicholas C. Norman, Paul G. Pringle
doaj +1 more source
Chemical State of Complex Uranium Oxides [PDF]
Physical Review Letters, 2013 We report here the first direct observation of U(V) in uranium binary oxides and analyze the gradual conversion of the U oxidation state in the mixed uranium systems. Our finding clarifies previous contradicting results and provides important input for the geological disposal of spent fuel, recycling applications and chemistry of uranium species.
Kvashnina, K. O. +3 more
openaire +3 more sources
The effect of oxidation state on the viscosity of melts in the system Na2O-FeO-Fe2O3-SiO2 [PDF]
, 1987 The viscosities of two melts in the system Na2O-FeO-Fe2O3-SiO2 have been measured as a function of oxidation state. The experiments were conducted by concentric-cylinder viscometry, on melts equilibrated with gas mixtures in a vertical tube, gas-mixing ...
Virgo, David, Dingwell, Donald B.
core +1 more source
Polyoxometalate-Based Catalysts for CO2 Conversion
Molecules, 2019 Polyoxometalates (POMs) are a diverse class of anionic metal-oxo clusters with intriguing chemical and physical properties. Owing to unrivaled versatility and structural variation, POMs have been extensively utilized for catalysis for a plethora of ...
Yanwei Cao +3 more
doaj +1 more source