Results 91 to 100 of about 210,432 (378)

Advances in Morphometrics in Archaeobotany

open access: yesEnvironmental Archaeology, 2019
Morphometric analysis offers an alternative or augmentation to traditional archaeobotanical methods to address differences within and between plant species and their remains, refining and enhancing taxonomic resolution.
M. Portillo   +7 more
semanticscholar   +1 more source

Midbrain PAG Astrocytes Modulate Mouse Defensive and Panic‐Like Behaviors

open access: yesAdvanced Science, EarlyView.
Astrocytes in the midbrain periaqueductal gray (PAG) dynamically encode threat intensity and shape defensive action selection in mice. Real‐time Ca2+ imaging reveals robust astrocytic activation during predator odor and CO2 exposure. Aberrant astrocytic Ca2+ overactivation disrupts goal‐directed escape, biases behavior toward freezing, and induces ...
Ellane Barcelon   +10 more
wiley   +1 more source

Gut Microbiota‐Derived Anandamide Mediates the Therapeutic Effects of Urolithin A on Alcohol‐Induced Cognitive and Social Dysfunction via CB1R‐DRD2‐RAP1 Signaling Axis

open access: yesAdvanced Science, EarlyView.
This study reveals that Urolithin A (UA) counteracts alcohol‐induced cognitive and social dysfunction (AICSD) via a gut microbiome‐dependent mechanism. UA‐enriched Bacteroids sartorii and Parabacteroids distasonis elevate anandamide (AEA), which activates the CB1R‐DRD2‐Rap1 signaling cascade to drive synaptic repair and reduce neuroinflammation ...
Hongbo Zhang   +9 more
wiley   +1 more source

Analyzing Fluctuating Asymmetry with Geometric Morphometrics: Concepts, Methods, and Applications

open access: yesSymmetry, 2015
Approximately two decades after the first pioneering analyses, the study of shape asymmetry with the methods of geometric morphometrics has matured and is a burgeoning field.
C. Klingenberg
semanticscholar   +1 more source

A Degradable Bioinspired Flier with Aerogel‐Based Colorimetric Sensors for Environmental Monitoring

open access: yesAdvanced Science, EarlyView.
Biodegradable fliers are developed inspired by Tipuana tipu samaras, integrating cellulose nanocrystal aerogel (CNCa) sensors loaded with natural dyes for pH and ammonia detection. The lightweight, degradable fliers mimic natural morphology and aerodynamics, offering an eco‐friendly, scalable solution for in situ environmental monitoring after passive ...
Gianpaolo Gallo   +4 more
wiley   +1 more source

Structure and morphometrics of Ancyrocephalus paradoxus (Monogenea: Ancyrocephalidae) from Sander lucioperca (Percidae) in Czechia

open access: yesHelminthologia, 2019
New morphometric data, including details of the copulatory system and attachment structures, as well as inner organs are provided for Ancyrocephalus paradoxus Creplin, 1839. Scanning electron microscopy reveals new information of the body shape, position
Rubtsova N. Yu., Heckmann R. A.
doaj   +1 more source

Hyperviscous Diabetic Bone Marrow Niche Impairs BMSCs Osteogenesis via TRPV2‐Mediated Cytoskeletal‐Nuclear Mechanotransduction

open access: yesAdvanced Science, EarlyView.
Diabetic bone marrow exhibits pathological ECM hyperviscosity that activates TRPV2‐mediated Ca2⁺ influx, leading to perinuclear F‐actin disassembly, nuclear deformation, and chromatin condensation. This cytoskeletal‐nuclear decoupling suppresses osteogenic differentiation of BMSCs.
Yao Wen   +8 more
wiley   +1 more source

Approaching a population‐level assessment of body size in pinnipeds using drones, an early warning of environmental degradation

open access: yesRemote Sensing in Ecology and Conservation
Body mass is a fundamental indicator of animal health closely linked to survival and reproductive success. Systematic assessment of body mass for a large proportion of a population can allow early detection of changes likely to impact population growth ...
Daire Carroll   +3 more
doaj   +1 more source

Long-term impacts of captivity on skull morphology and endocranial volume in a marsupial carnivore

open access: yesRoyal Society Open Science
A challenge in modern conservation is maintaining ecological roles and natural behaviours of wildlife in an anthropogenic world. Captive breeding has been linked to morphological changes that may impact individual fitness for reintroduction to the wild ...
Emily L. Scicluna   +5 more
doaj   +1 more source

Isometry in mesosaurs: Implications for growth patterns in early amniotes

open access: yesActa Palaeontologica Polonica, 2022
Mesosaurs were small amphibious tetrapods that lived in western Gondwana during the early Permian or even earlier, when temperate Carboniferous–Permian conditions initiated after the glaciations that affected the southern region of Pangea.
PABLO NÚÑEZ DEMARCO   +2 more
doaj   +1 more source

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