Results 31 to 40 of about 127,824 (171)

Tailoring Oxide/MAX Phase Nanocomposites via Low‐Temperature Oxidation for Lithium‐Ion Battery Anodes: Peeking Behind the Electrochemical Mechanism via In Situ Investigations

open access: yesAdvanced Science, Volume 12, Issue 45, December 4, 2025.
Controlled oxidation of Ti3Al0.3Sn0.7C2 produces SnO2/TiO2–MAX nanocomposites with superior electrochemical performance. The SnHigh_Ox700 sample shows optimal stability, capacity (300 mAh g−1), and reversibility (99.2%). Its unique morphology ensures efficient charge transport and stress accommodation. In situ analyses reveal reversible SnO2 conversion/
Irene Ostroman   +15 more
wiley   +1 more source

Una biorrefinería en zonas agrícolas en Extremadura: alternativa a los combustibles fósiles [PDF]

open access: yes, 2008
Las oportunidades que presentan las áreas agrícolas y de dehesa bien implantadas, deberían aprovecharse de acuerdo a la actual coyuntura socio-económica.
Hernández Díaz-Ambrona, Carlos Gregorio
core   +1 more source

US Foreign Policy and the Gulf States: Changing Dynamics in a Multipolar World

open access: yesWorld Affairs, Volume 188, Issue 4, Winter 2025.
ABSTRACT This article focuses on US foreign policy toward the Gulf from Obama's Pivot to Asia to the initial period of the second Trump administration. It situates the role of the US within the broader context of the global energy transition and the Gulf states as geopolitical actors in a multipolar world order.
Steven Wright
wiley   +1 more source

Environmental impacts of land use and occupation in subbasins of Campinas, São Paulo, Brazil

open access: yesActa Brasiliensis, 2019
Changes promoted by anthropic actions in ecosystems located in urban habitats have generated the destruction of areas of great environmental importance, such as that occurring in small river basins that have suffered as a consequence of constant episodes
Desiree Baldin Damame   +2 more
doaj   +1 more source

Enquadramento energético do sector residencial português [PDF]

open access: yes, 2012
Portugal não possui reservas de energias fósseis, pelo que importa grande parte dos recursos energéticos que consome. Nos últimos anos tem sido feita uma aposta na instalação de sistemas de produção de energia a partir de energias renováveis no sentido ...
Almeida, Manuela Guedes de   +2 more
core  

Lost Opportunities in Sustainable Hydropower: The Overlooked Role of Sediment Management and Coordinated Dam Operations

open access: yesEarth's Future, Volume 13, Issue 12, December 2025.
Abstract Balancing hydropower development with river sediment connectivity is essential for meeting energy demands while mitigating impacts on river ecosystems and delta communities. Here, we introduce an integrated modeling framework to jointly explore water and sediment release strategies alongside dam planning, addressing the complex interplay ...
Bruno Invernizzi   +4 more
wiley   +1 more source

El desarrollo del Sistema Energético Solar-Hidrógeno en América Latina: Potencialidades, oportunidades y barreras

open access: yesMaskana, 2014
El Sistema Energético Solar-Hidrógeno (SESH) constituye un sistema energético cuya fuente primaria es la energía solar, directa o indirecta, y la secundaria el hidrógeno.
Fausto Posso, Johanna Sánchez
doaj   +1 more source

Across the edge: Spatial segregation drives community structure in tri‐trophic multilayer networks at a forest–grassland edge

open access: yesJournal of Animal Ecology, Volume 94, Issue 11, Page 2205-2219, November 2025.
This study reveals how forest–grassland edges act as ecological barriers that shape tri‐trophic interaction networks. Using multilayer network theory, it uncovers how species influence and biodiversity patterns emerge across spatial layers, offering novel insights into edge‐driven community assembly and conservation in fire‐prone mosaics.
Henrique Negrello‐Oliveira   +2 more
wiley   +1 more source

Análisis energético en lecherías de la región Pampeana Argentina. Parte 2. Contabilidad energética

open access: yesAgronomía Mesoamericana, 2022
Introducción. La actividad agropecuaria es usuaria y productora de energía, puede evaluarse mediante el análisis energético, que también relaciona conceptos de física, bioquímica y biología. Objetivos.
Gustavo Daniel Gimenez   +2 more
doaj   +1 more source

The Oxidized Ti2(Al/Sn)C Behavior as Anode for Lithium‐ and Sodium‐Ion Batteries: The Role of the MAX Phase Order

open access: yesChemElectroChem, Volume 12, Issue 19, October 3, 2025.
The present study is dedicated to investigation of the performance of oxidized Ti2(Al/Sn)C system (211 MAX phases) as anode for lithium and sodium ion batteries. Their behavior has been rationalized as function of the tin content and as function of the MAX phase order, with detailed comparison with the 312 MAX phase analog series.
Nicholas Vallana   +9 more
wiley   +1 more source

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