Results 51 to 60 of about 4,877 (73)

Testing the Dry Refuge Model: Paleoecological Insights From Late Pleistocene Gomphotheres in Ecuador

open access: yesEcology and Evolution, Volume 16, Issue 8, August 2026.
We present paleontological evidence that may prove the Dry Refuge Model in Ecuador during the Late Pleistocene. ABSTRACT Paleoenvironmental records indicate that Neotropical regions near the Equator experienced reduced rainfall during the Last Glacial Maximum (LGM). However, some records show conflicting environmental signals.
Erwin González‐Guarda   +9 more
wiley   +1 more source

Oceanographic and climatic variability in the lower gulf of california: links with the tropics and north pacific

open access: yesCiencias Marinas, 2001
The links between climate and oceanography in the lower Gulf of California (LGC) and the observed physical variability in the open Pacific were studied on interannual to decadal timescales.
G Bernal, P Ripa, JC Herguera
doaj   +1 more source

What do We Mean by Environmental Heterogeneity? Toward A Mechanistically Explicit and Scale‐Dependent Framework

open access: yesEcology and Evolution, Volume 16, Issue 8, August 2026.
We synthesized 360 studies on environmental heterogeneity (EH) across taxa, regions, and disciplines. Only 10% of studies explicitly defined EH, and definitions were predominantly descriptive. We identify four operational interpretations of EH and propose a Research Roadmap linking EH metrics to five mechanistic hypotheses with testable predictions ...
Iván Hérnandez‐Chávez   +3 more
wiley   +1 more source

Estimación espectral de ondas oceánicas por máxima entropía

open access: yesGeofísica Internacional, 1980
Se realiza un estudio estadístico de cuatro criterios para determinar el orden de un modelo autorregresivo (AR) a ser ajustado a datos de olas oceánicas.
H. G. Pena   +3 more
doaj   +1 more source

Single‐Breathhold 3D MR Elastography in the Liver, With Simultaneous R2* and PDFF Mapping

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 2, Page 682-697, August 2026.
Purpose To develop a sequence for the rapid acquisition of MR elastography (MRE) parameters in 3D, with simultaneous measurement of proton‐density fat fraction (PDFF) and R2* for multiparametric assessment of liver disease. Methods The proposed sequence uses an interleaved motion‐encoding scheme to acquire 3D volumes of all motion encodings and wave ...
Donovan P. Tripp   +10 more
wiley   +1 more source

Functionalized rare earth-doped nanoparticles for breast cancer nanodiagnostic using fluorescence and CT imaging

open access: yesJournal of Nanobiotechnology, 2018
Background Breast cancer is the second leading cause of cancer death among women and represents 14% of death in women around the world. The standard diagnosis method for breast tumor is mammography, which is often related with false-negative results ...
Akhil Jain   +8 more
doaj   +1 more source

Immunoglobulin binding protein (BiP) forms two types of dimers

open access: yesProtein Science, Volume 35, Issue 8, August 2026.
Abstract Immunoglobulin binding protein (BiP) is a chaperone protein that plays crucial roles in protein folding and transport by binding unfolded proteins in the substrate binding domain (SBD), an interaction allosterically linked to the nucleotide occupancy of the nucleotide binding domain (NBD).
Karina New   +6 more
wiley   +1 more source

Allelic and genotypic variation of leucine-aminopeptidase (Lap-2) and phosphoglucomutase (Pgm) in Procambarus clurkii (Decapoda: Cambaridae), acclimated at different temperatures and exposed to thermal hardening

open access: yesCiencias Marinas, 1998
 In this study, the allozymic and genotypic variation of leucine-aminopeptidase (Lap-2) and phosphoglucomutase (Pgm) in Procambarus clarkii from Baja California is analyzed, under different thermic conditions.
F Correa-S   +5 more
doaj   +1 more source

Bianchi I Spacetimes in f(Q)‐Gravity

open access: yesFortschritte der Physik, Volume 74, Issue 8, August 2026.
ABSTRACT The Kasner spacetimes are exact solutions that are self‐similar and of significant interest because they can describe the dynamic evolution of kinematic variables near the singularity of the Mixmaster universe. The chaotic behavior of the Mixmaster universe is related to the Kasner relations.
Andronikos Paliathanasis, Genly Leon
wiley   +1 more source

The effect of parameter variability in the allometric projection of leaf growth rates for eelgrass (Zostera marina L.)

open access: yesLatin American Journal of Aquatic Research, 2014
Restoration of eelgrass Zostera marina meadows from harmful anthropogenic influences has made it essential to evaluate these efforts by using non-destructive assessments.
Elena Solana-Arellano   +3 more
doaj   +1 more source

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