Results 61 to 70 of about 93,853 (324)

La fragmentació de les masses forestals redueix la seva diversitat genètica [PDF]

open access: yes, 2006
Un estudi del Centre de Recerca Ecològica i Aplicacions Forestals (CREAF), de la Universitat Autònoma de Barcelona, dut a terme per Alistair Jump, investigador postdoctoral, i Josep Peñuelas, professor d'investigació del CREAF i del Consell Superior d ...
Peñuelas, Josep
core   +1 more source

La maravillosa historia de los números [PDF]

open access: yes, 2004
La maravillosa historia de los números es un cuento-relato elaborado como material de divulgación por El CSIC en la Escuela [ http://www.csicenlaescuela.csic.es ] para el portal WEB Museo Virtual de la Ciencia del CSIC [ http://museovirtual.csic.es ...
Gómez Díaz, María José   +3 more
core   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

open access: yesAdvanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje   +7 more
wiley   +1 more source

Reflexiones sobre el Framework de desarrollo del Consejo Superior de Investigaciones Científicas [PDF]

open access: yes, 2007
El Consejo Superior de Investigaciones Científicas (CSIC) ha definido un marco común para realizar sus desarrollos. Dicho marco representa una ventaja estratégica gracias a su enorme flexibilidad.
Barroso, José Ángel   +2 more
core  

Transient Charging of Mixed Ionic‐Electronic Conductors by Anomalous Diffusion

open access: yesAdvanced Materials, EarlyView.
This article explores charge transport in mixed ionic‐electronic conductors (MIECs) through electrochemical impedance spectroscopy and transient current analysis. Focusing on PEDOT:PSS, WO3, and n‐doped PBDF, it uncovers the impact of anomalous diffusion via fractional modeling. The study reveals key correlations that deepen understanding and guide the
Heyi Zhang   +9 more
wiley   +1 more source

Role of Liquid Composition in the Transient Liquid Assisted Growth of Superconducting YBa2Cu3O7‐δ Films

open access: yesAdvanced Materials, EarlyView.
The Y supersaturation in the [Ba‐Cu(I/II)‐O] transient liquid composition is the driving force toward YBCO nucleation and growth in TLAG. Tuning the initial (Ba:Cu) molar ratio in the ink composition determines the YBCO epitaxial nucleation through supersaturation control.
Lavinia Saltarelli   +12 more
wiley   +1 more source

Improving the 14c dating of marine shells from the Canary Islands for constructing more reliable and accurate chronologies [PDF]

open access: yes, 2012
Radiocarbon dating of closely associated marine mollusk shells and terrestrial material (charred wood or bone) collected from archaeological contexts on Tenerife and Fuerteventura islands allowed us to quantify the marine C-14 reservoir effect (Delta R ...
Acosta   +14 more
core   +1 more source

Self‐Cooling Molecular Spin Qudits

open access: yesAdvanced Materials, EarlyView.
A material made of [GdEr] molecular dimers can encode a qudit and perform as a magnetic refrigerant. Microwave resonant pulses coherently manipulate its 16 spin states, while direct demagnetization measurements cool the material and a device down to temperatures below 1 K.
Elías Palacios   +12 more
wiley   +1 more source

La web universitaria como una herramienta de información al alumnado potencial

open access: yesRed U, 2012
La Web es un elemento disponible por parte de las universidades para emitir información y para el desarrollo de relaciones con sus diferentes públicos objetivos, entre los que destacan los alumnos tanto potenciales como actuales.
Julián Pando García   +2 more
doaj   +1 more source

Guerra y sociedad en la monarquía hispánica: política, estrategia y cultura en la Europa moderna (1500-1700), vols. I-II. [Reseña] [PDF]

open access: yes, 2008
Reseña de: Enrique García Hernán - Davide Maffi (coords.), Guerra y sociedad en la monarquía hispánica: política, estrategia y cultura en la Europa moderna (1500-1700), vols.
Fernández-de-Córdova-Miralles, Á. (Álvaro)
core  

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