Results 51 to 60 of about 158,660 (220)

Recovering European River Invertebrate Communities Homogenize or Differentiate Depending on Anthropogenic Stress

open access: yesGlobal Change Biology, Volume 32, Issue 1, January 2026.
(a) European river invertebrate communities showed an average increase in local richness over time (1994–2023), indicating partial local recovery following the alleviation of anthropogenic stress (e.g., point‐source pollution). However, this local recovery was not accompanied by increases in β‐diversity, likely due to persistent, unaddressed stressors,
Daniela Cortés‐Guzmán   +9 more
wiley   +1 more source

Superconducting gap and vortex lattice of the heavy fermion compound CeCu_2Si_2 [PDF]

open access: yes, 2015
The order parameter and pairing mechanism for superconductivity in heavy fermion compounds are still poorly understood. Scanning tunneling microscopy and spectroscopy at ultra-low temperatures can yield important information about the superconducting ...
Condensed Matter Physics   +10 more
core   +4 more sources

Foliar spectral signatures reveal adaptive divergence in live oaks (Quercus section Virentes) across species and environmental niches

open access: yesNew Phytologist, Volume 248, Issue 1, Page 370-388, October 2025.
Summary Genomic tools have advanced our understanding of species and population structure, but distinguishing neutral from adaptive evolution remains challenging due to limited methods for measuring a broad spectrum of phenotypic traits. We used spectroscopic data from preserved leaves to test for adaptive divergence among populations of live oaks ...
Mariana S. Hernández‐Leal   +3 more
wiley   +1 more source

Efecto del procesado termomecánico sobre las propiedades mecánicas de la aleación MA956. II Caracterización mecánica

open access: yesRevista de Metalurgia, 1998
Se estudia el efecto de las características microestructurales de la aleación MA956 obtenidas en algunas de las etapas intermedias de su procesado, sobre sus propiedades mecánicas a temperatura ambiente y a bajas temperaturas.
J. Chao, G. González-Doncel
doaj   +1 more source

Proceso de tintura del poliéster a bajas temperaturas: cinética de tintura con colorantes dispersos. [PDF]

open access: yes, 1995
Este trabajo propone un proceso de tintura para el poliéster, a bajas temperaturas (40°C y menores), con colorantes dispersos, utilizando una microemulsión formada por una pequeña proporción de solvente orgánico (halogenuro de alquilo) y un ...
Carrión Fité, Francisco Javier
core  

El premio Wheatley de la American Physical Society: una aventura patagónica [PDF]

open access: yes, 2001
A principios de 1990, la American Physical Society (APS) aprobó la creación de un premio en reconocimiento a la dedicación de físicos norteamericanos que hubieran realizado, contribuciones al desarrollo Física en países del Tercer Mundo.
Fasano, Yanina
core  

Proximity effect and strong coupling superconductivity in nanostructures built with an STM

open access: yes, 2001
We present high resolution tunneling spectroscopy data at very low temperatures on superconducting nanostructures of lead built with an STM. By applying magnetic fields, superconductivity is restricted to length scales of the order of the coherence ...
A. Izquierdo   +25 more
core   +1 more source

Tunneling spectroscopy of the superconducting state of URu2Si2 [PDF]

open access: yes, 2012
We present measurements of the superconducting gap of URu$_2$Si$_2$ made with scanning tunneling microscopy (STM) using a superconducting tip of Al. We find tunneling conductance curves with a finite value at the Fermi level.
Aoki, D.   +6 more
core   +2 more sources

Plant Responses to Anomalous Heat and Drought Events in the Sonoran Desert

open access: yesGlobal Change Biology, Volume 31, Issue 5, May 2025.
What are the impacts of region‐wide heat and drought events on desert vegetation? This multi‐scale assessment shows that columnar cacti and succulent trees show acute plant stress across the Sonoran Desert. The expected increased frequency of heat and drought events will likely have landscape‐wide impacts that could fundamentally reshape populations of
Benjamin T. Wilder   +10 more
wiley   +1 more source

Susceptibilidad al daño por heladas en el pino híbrido, Pinus elliottii Engelm var. elliottii × Pinus caribaea Morlet var. hondurensis (sénéclauze) W.H. Barrett & Golfari y su relación con variables de crecimiento y fenología

open access: yesRevista de la Facultad de Agronomía
Las especies híbridas se adaptan mejor a diferentes ambientes que sus progenitores. El pino híbrido (pino híbrido PEE×PCH) entre Pinus elliottii Engelm var. elliottii × Pinus caribaea Morlet var. hondurensis (Sénéclauze) W.H.
Cristian Damian Schoffen   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy