Results 71 to 80 of about 23,801 (236)

Alambique : didáctica de las ciencias experimentales

Resumen tomado de la publicaciónEl cambio climático constituye uno de los retos fundamentales de nuestro tiempo. Por su complejidad, su tratamiento, su tratamiento en el aula entraña un dialogo permanente entre los modelos explicativos de las disciplinas
Pro Bueno, Antonio José de
core   +3 more sources

Counterintuitive Fluorescence Blue Shift in Symmetry Breaking Dicationic Bis(indolium) with Two‐Photon Absorption Properties for NIR Living Cell Imaging

Advanced Materials, EarlyView.
Highly water‐soluble dicationic bis(indolium) dyes have been prepared, showing excellent two‐photon absorption and light emission. Their fluorescence behavior discloses an unusual increasing blue shift with increasing solvent polarity, which, in parallel, is beneficial for enhanced detection in biological media.
Carlos Benitez‐Martin, Jose M. Marin‐Beloqui, Juan T. López Navarrete, Juan Casado, Francisco Najera, Ezequiel Perez‐Inestrosa   +5 more
wiley   +1 more source

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Bioorthogonal Photoactivation of 2‐Nitrobenzyl Caged Doxorubicin Anticancer Prodrugs on Gold Nanostars

Advanced Materials, EarlyView.
Bioorthogonal chemistry was applied to intracellularly photoactivate Doxorubicin (Dox) using gold nanostars (AuNSt) and near‐infrared (NIR) light. Two prodrugs were used: one photoactivatable, masked with 2‐nitrobenzyl carbamate (proDox1) and another photolabile, masked with 2‐nitrobenzyl diol (proDox2), which was attached to the AuNSt surface.
Juan José Esteve‐Moreno, Andrea Escudero, Oscar Ferreira Silvestre, José Manuel Terrés, Mónica Gorbe, Eva Garrido, Carlos Renero‐Lecuna, Judith Langer, María Alfonso, Javier Ibañez, Félix Sancenón, Roberto Cao‐Milán, Luis M. Liz‐Marzán, Alba García‐Fernández, Andy Hernández‐Montoto, Ramón Martínez‐Máñez   +15 more
wiley   +1 more source

Qué dicen esperar y qué dicen que han encontrado los estudiantes del MAES, en la especialidad de Ciencias [PDF]

, 2012
En este trabajo se presenta una parte de la información obtenida al estudiar una muestra amplia de asistentes al Máster Universitario en Formación de Profesorado de Educación Secundaria Obligatoria y Bachillerato, Formación Profesional y Enseñanzas de ...
Solís Ramírez, Emilio, Rivero García, Ana, Martín del Pozo, Rosa   +2 more
core  

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Dog invasions in protected areas: A case study using camera trapping, citizen science and artificial intelligence

Global Ecology and Conservation
Domestic dogs, Canis familiaris, wandering into natural habitats poses a grave threat to wildlife, increasing predation pressure and disease risk and disrupting the ecological balance within ecosystems.
Santiago Gutiérrez-Zapata, Simone Santoro, Manuel Emilio Gegundez-Arias, Nuria Selva, Javier Calzada   +4 more
doaj   +1 more source

Concepciones de maestros costarricenses sobre la indagación en ciencias desde un modelo de complejidad

Indagatio Didactica, 2016
Esta investigación, con alcance exploratorio y descriptivo, tiene como propósito el análisis de las concepciones acerca de la indagación escolar en la implementación del Programa Educación del Pensamiento Científico basado en la Indagación del Ministerio
Diego Armando Retana Alvarado, Bartolomé Vázquez Bernal   +1 more
doaj   +1 more source

Aplicación de un ciclo de mejora en la asignatura "didáctica de las ciencias experimentales" en el Grado de Educación Primaria: el papel del maestro de ciencias [PDF]

, 2015
En esta comunicación se presenta la experiencia docente desarrollada en el marco del Programa de Formación Docente del Profesorado organizado por la Universidad de Sevilla.
González Castanedo, Yolanda
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