Results 61 to 70 of about 1,811,573 (224)

Da Vinci's mischief: xylem conduits in the stems of woody plants do not furcate

open access: yesNew Phytologist, Volume 250, Issue 5, Page 3001-3013, June 2026.
Summary The hydraulic architecture of plants is often modeled as a ‘furcating’ network, in which xylem conduits proliferate in number toward the stem apex, analogous to animal circulatory systems. Yet whether furcation actually occurs within woody stems remains untested, despite major implications for carbon costs and hydraulic efficiency.
Gilberto Alemán‐Sancheschúlz   +4 more
wiley   +1 more source

Detección por el satélite LANDSAT-4 de los efectos de la riada del 8-XI-82 en el río Segre [PDF]

open access: yes, 1984
Por medio de técnicas de tratamiento de imágenes digitales se realiza un estudio de los efectos producidos por una inundación ocurrida a finales del año 1982 en el valle del río Segre, en Catalunya, a partir de la información multiespectral captada por ...
Arbiol, Roman   +2 more
core   +1 more source

Urban–Wild Interface Diversity: A Comprehensive Checklist of Herpetofauna of Guayaquil, Ecuador

open access: yesEcology and Evolution, Volume 16, Issue 5, May 2026.
Amphibians and reptiles in Guayaquil comprise multiple taxonomic orders and occur across conservation areas, forest remnants, and urban parks, including several endemic species and numerous taxa with type localities in the city. Although most species are globally classified as Least Concern, discrepancies between global and national threat assessments ...
Keyko Cruz‐García   +3 more
wiley   +1 more source

Demo 25. Movimiento de electrones en campos E y B: el ciclotrón [PDF]

open access: yes, 2013
Objetivo:1.- Observar el proceso de generación de cargas libres. 2.- Observar el movimiento de cargas en campos eléctricos y magnéticos. Estudio experimental del movimiento de electrones en un campo magnético uniforme.
Andrés, Miguel V.   +2 more
core  

Data gaps and heterogeneity limit our understanding of human–wildlife interactions: A continental study of Andean bears

open access: yesPeople and Nature, Volume 8, Issue 5, Page 1499-1519, May 2026.
Abstract The expansion and intensification of human activities have increased interactions between people and wildlife. Interactions involving bears and other large carnivores are complex and can lead to conflicts. Promoting positive coexistence requires managing information, which is not always available.
Roxana Rojas‐VeraPinto   +2 more
wiley   +1 more source

RESONANCIA EN UN MEDIO DIELÉCTRICO TENIENDO EN CUENTA LA ANISOTROPÍA EN EL CAMPO LOCAL.

open access: yesAnales (Asociación Física Argentina), 2013
Se estudió el desfasaje del movimiento de un electrón respecto al campo eléctrico macroscópico, considerando que el campo local que actúa sobre el electrón es el de una cavidad elipsoidal con uno de sus ejes principales en la dirección del campo externo.
Adrián H. Buep, J. Ignacio Casaubon
doaj  

Modelos de Naciones Unidas: una herramienta constructivista

open access: yesAlteridad : Revista de Educación, 2019
En el presente documento se presenta la investigación realizada sobre el caso de estudio del Modelo de Naciones Unidas (MUN) en un grupo de estudiantes de la Maestría en Educación: Campo Educación ambiental (MECEA). Esta investigación presenta relevancia
Fernando David Márquez Duarte
doaj   +1 more source

Trends and Challenges in Water Governance Systematic Review and Bibliographic Study of Scientific Publications (2018–2025)

open access: yesWorld Water Policy, Volume 12, Issue 2, May 2026.
ABSTRACT Water governance has emerged as a critical analytical framework for addressing the complexity of socioecological water systems in contexts of increasing climate vulnerability and anthropogenic pressure. This study presents a systematic review and bibliometric analysis of 50 scientific articles indexed on water governance published between 2018
Roger Pichis‐García   +1 more
wiley   +1 more source

Algunas reflexiones epistemológicas sobre la investigación educativa

open access: yesEducar, 1988
En este trabajo la autora parte de que el campo de la investigación en educación esta lejos de constituir un mapa bien delimitado, definido y eficaz. Se plantea una serie de factores que inciden en esta situación y se detiene en hacer propuestas que ...
Carme Vidal Xifré
doaj   +1 more source

Functional traits predict changes in floral phenology under climate change in a highly diverse Mediterranean community

open access: yesFunctional Ecology, Volume 40, Issue 5, Page 1270-1285, May 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plants are shifting their flowering phenology in response to climate change, but trends differ between species and communities. Functional traits can largely explain how different species respond to climate change by shifting their phenology, and can therefore help ...
Daniel Pareja‐Bonilla   +3 more
wiley   +1 more source

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