Results 91 to 100 of about 2,564,184 (334)

Trasladar el Aula al Laboratorio

open access: yesTecnología y Ciencia, 2018
La certificación y acreditación de las carreras de Ingeniería, iniciadas mediante la ley 24.521 de Educación Superior, han implicado el análisis exhaustivo de todas las instancias de formación de los futuros profesionales.
Jezabel Bianchotti, Emanuel Bianco
doaj  

Matemática y física en el Tímeo de Platón. Poliedros regulares y elementos naturales.

open access: yesPraxis Filosófica, 2015
Analizaremos las características de los cinco poliedros regulares convexos que Platón describe en el Timeo y esclareceremos los siguientes problemas: primero, mientras los poliedros regulares son cinco, los elementos naturales son solo cuatro; segundo ...
María Henar Lanza González
doaj   +1 more source

Study of the Cys-His bridge electron transfer pathway in a copper-containing nitrite reductase by site-directed mutagenesis, spectroscopic, and computational methods [PDF]

open access: yes, 2018
The Cys-His bridge as electron transfer conduit in the enzymatic catalysis of nitrite to nitric oxide by nitrite reductase from Sinorhizobium meliloti 2011 (SmNir) was evaluated by site-directed mutagenesis, steady state kinetic studies, UV-vis and EPR ...
Brondino, Carlos Dante   +7 more
core   +1 more source

Atomistic Mechanisms Triggered by Joule Heating Effects in Metallic Cu‐Bi Nanowires for Spintronics

open access: yesAdvanced Materials, EarlyView.
Bi doped metallic Cu nanowires are promising for spintronics thanks to the stabilization of a giant spin Hall effect. However, heat resulting from current injection forces Bi to leave solution, forcing segregation into monoatomic decorations which evolve into coherent crystalline aggregates.
Alejandra Guedeja‐Marrón   +6 more
wiley   +1 more source

O USO DE MATERIAIS DE BAIXO CUSTO PARA EXPERIMENTAÇÃO NAS AULAS DE DENSIDADE E PRESSÃO HIDROSTÁTICA

open access: yesRevista Prática Docente, 2017
A aula de física baseada em um formalismo matemático, ou ainda, sem relacionar o conteúdo com o cotidiano, tem feito com que a maioria dos alunos não estabeleça afinidade com a disciplina, o que leva a uma aprendizagem mecânica dos conceitos apresentados.
Marcelo Luiz da Silva
doaj   +1 more source

Mechanistic Insight into the Enzymatic Reduction of Truncated Hemoglobin N of Mycobacterium tuberculosis: role of the CD loop and pre-A Motif in electron cycling [PDF]

open access: yes, 2014
Background: The HbN of Mycobacterium tuberculosis carries a potent nitric-oxide dioxygenase activity despite lacking a reductase domain. Results: The NADH-ferredoxin reductase system acts as an efficient partner for the reduction of HbN.
Bidon Chanal, Axel   +12 more
core   +2 more sources

COFs on MOFs: Layer‐by‐Layer Synthesis of MOF@COF Nanoparticles with Synergistic Adsorption

open access: yesAdvanced Materials, EarlyView.
A layer‐by‐layer strategy enables the growth of crystalline covalent organic framework (COF) shells on metal–organic framework nanoparticles, creating core–shell structures with tunable porosity. Ordered interstitial mesopores are formed during shell growth, which are connected with the COF's intrinsic micropores, thereby enhancing water sorption. This
Ana Guillem‐Navajas   +11 more
wiley   +1 more source

Investigación y divulgación científica: su importancia para el avance de la Física

open access: yesAvances
La conexión entre investigación y divulgación científica desempeña un papel crucial en el avance de la física y su impacto social. Este artículo presenta una reflexión teórica sobre la indispensable e importante sinergia que existe entre la investigación
Franmis José Rodríguez Jiménez
doaj   +1 more source

Thin shells surrounding black holes in F(R) gravity [PDF]

open access: yes, 2019
In this article, we consider spherical thin shells of matter surrounding black holes in F(R) theories of gravity. We study the stability of the static configurations under perturbations that conserve the symmetry.
Eiroa, Ernesto Fabian   +1 more
core   +2 more sources

Gapless Superconductivity From Extremely Dilute Magnetic Disorder in 2H‐NbSe2‐xSx

open access: yesAdvanced Materials, EarlyView.
We demonstrate that 2H‐NbSe2‐xSx hosts gapless superconductivity at unexpectedly low magnetic impurity concentrations. Combining STM, Bogoliubovde Gennes simulations, DFT, and quasiparticle interference, we comprehensively study the development of gapless behavior and show that SeS substitution reshapes the band structure, enhances nesting, and drives ...
Jose Antonio Moreno   +16 more
wiley   +1 more source

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