Results 231 to 240 of about 2,543,869 (384)

El scautismo en la educación física bonaerense argentina o acerca del buen encauzamiento varonil (1914-1916) [PDF]

open access: yes, 2008
Aceptando que el cuerpo se ha visto históricamente atravesado por diferentes dispositivos, prácticas, saberes, modelos y conceptos, y que dicho proceso se ha configurando en diferentes instituciones; el siguiente artículo indaga en dicho proceso en el ámbito escolar argentino.
openaire  

Layer Sliding‐Induced Fluorescence Changes in a Flexible Hydrogen‐Bonded Organic Framework

open access: yesChemistry – A European Journal, EarlyView.
A fluorescence color change from blue to green of pyrene‐based HOFs was achieved by the sliding of the H‐bonded 2D network layers. Single‐crystal XRD analysis revealed that the 2D‐layer sliding forms a pyrene dimer, which results in the green color of the HOF emission including the excimer contribution.
Taito Hashimoto   +5 more
wiley   +1 more source

Sumari [PDF]

open access: yes, 2007
Revista de física
core  

Enhancing the Hydrogen Evolution Reaction Performance of Ti3C2O2 MXene by Metal Doping

open access: yesChemPhysChem, EarlyView.
Doping Ti3C2O2 by metals may effectively reduce the free energy of the hydrogen evolution reaction reaction steps, thereby enhancing electrocatalytic efficiency. The atomic and electronic structure, thermodynamic stability, and effect of doping the O‐terminated Ti3C2 MXene (Ti3C2O2) by Hf, Nb, Ta, and Zr on the electrocatalytic activity for the ...
Hui Li   +5 more
wiley   +1 more source

Tuning the Fe‐Oxide Nanoparticle Properties by Playing with Salt Precursors and Camellia sinensis Extract Concentrations

open access: yesChemPhysChem, EarlyView.
Functionalized iron‐oxide nanoparticles exhibiting distinct physical characteristics (particle size and magnetic anisotropy) were successfully biosynthesized by modulating the precursor salts and using two different chemical synthesis pathways. By varying salt precursors and precipitating agents, polyphenol‐functionalized γ‐Fe2O3 nanoparticles (NPs ...
Renzo Rueda‐Vellasmin   +4 more
wiley   +1 more source

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