Results 171 to 180 of about 3,488,373 (301)
La teoría política y la universidad en el siglo XIV
Patristica et Mediaevalia, 2004 En la Edad Media es difícil distinguir entre la teoría política y las ideas, más abarcativas pero a la vez bastante vagas, de orientación política. El área de acción política no estaba en absoluto definida de forma clara.
Jürgen Miethke
doaj
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 +11 more
wiley +1 more source
Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers
Advanced Materials, EarlyView.Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez +9 more
wiley +1 more source
Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2012 This work argues the role of communication in natural sciences classrooms and delimits a way of analysis in relation to interactive discursive circuits.
De Longhi, A.L.; +7 more
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Advanced Materials, EarlyView.Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim +17 more
wiley +1 more source
Revista MENDIVELa preparación de los docentes de preuniversitario para la orientación profesional hacia carreras de Ciencias, es de gran importancia y pertinencia; por su contribución a la formación científica de los futuros bachilleres como parte de su desarrollo ...
Modesta Milians Carbo +2 more
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A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments
Advanced Materials, EarlyView.The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal +14 more
wiley +1 more source
Advanced Materials, EarlyView.2D α‐Co(OH)2 interleaved with Mo species displays an appealing dual functionality for the production and use of green hydrogen.Mo incorporation greatly benefits the electrochemical behaviour in Oxygen Evolution Reaction for H2 production, while the magnetocaloric response at liquid H2 temperature paves the way for alternative cryogenic refrigerants ...
Daniel Muñoz‐Gil +14 more
wiley +1 more source
Aprendizaje de las matemáticas desde la literatura
Voces de la educación, 2017 Las ciencias y las letras deben compartir espacio en la educación, evitando antagonismos y prejuicios. Saber razonar, desarrollar la creatividad y adquirir un pensamiento crítico es esencial, y en esta tarea, las ciencias y las letras deben aportar ...
Marta Macho Stadler
doaj
Advanced Materials, EarlyView.In this work, low bandgap (≈1.55 eV) semitransparent perovskite solar cells (ST‐PSCs) having thin (thickness < ≈100 nm) perovskite layers and transparent conductive oxide‐based rear electrodes are fabricated using vacuum‐deposition methods. Two different ST‐PSCs demonstrated a high light utilization efficiency value of 4.2 (PCE: 9.26% and AVT: 45.3 ...
Abhyuday Paliwal +9 more
wiley +1 more source