Results 131 to 140 of about 37,064 (353)

The extension of the taxon cycle model to island plants: insights from the Canarian vascular flora

open access: yesBiological Reviews, EarlyView.
ABSTRACT Taxon cycle models describe eco‐evolutionary patterns of lineage colonization, diversification, and decline across archipelagos, inferring an important role for competition amongst ecologically similar taxa in driving concurrent niche changes.
José María Fernández‐Palacios   +2 more
wiley   +1 more source

Positional Relationship Between the Orbicularis Oculi and Zygomaticus Complex Muscles by Ultrasonography: New Anatomical Insights for Crow's Feet Injection

open access: yesClinical Anatomy, EarlyView.
ABSTRACT The orbicularis oculi muscle (OOc) is strongly associated with facial aging as its contraction causes the formation of crow's feet. Botulinum neurotoxin (BoNT) injection is a representative treatment targeting muscle. The aim of this study was to demonstrate the anatomical relationship between the OOc and the zygomaticus complex muscles, and ...
Jiong‐Zhen Piao   +3 more
wiley   +1 more source

On the Reaction Mechanism of Nitrate Radical and DMPO in Non‐aqueous Photocatalytic Media

open access: yesChemistry – A European Journal, EarlyView.
This work identifies 2‐oxo‐5,5‐dimethyl‐1‐pyrroline 1‐oxyl (DMPOX), formed via the selective oxidation of 5,5‐dimethyl‐1‐pyrroline N‐oxide (DMPO) by nitrate radicals (NO3•) in nonaqueous media, as a distinctive EPR fingerprint of NO3•. The DFT‐supported mechanism clarifies its formation pathway and highlights DMPOX detection as a robust tool for ...
Alessandro Gottuso   +4 more
wiley   +1 more source

An enhanced index for debris-covered glacier boundary extraction, with emphasis on low-activity glaciers, using time-series SAR imagery

open access: yesInternational Journal of Digital Earth
Accurate delineation of glacier boundaries is essential for monitoring glacier changes. Debris-covered glaciers often resemble the textures of their surrounding terrain, making boundary extraction especially challenging.
Yue Shi   +7 more
doaj   +1 more source

Application of LANDSAT imagery for snow mapping in Norway [PDF]

open access: yes
The author has identified the following significant results. It was shown that if the snow cover extent was determined from all four LANDSAT bands, there were significant differences in results.
Odegaard, H., Ostrem, G.
core   +1 more source

Mapping Surface Flow Velocity of Glaciers at Regional Scale Using a Multiple Sensors Approach [PDF]

open access: gold, 2019
Romain Millan   +6 more
openalex   +1 more source

Synthesis and characterization of amphiphilic nitroxide 1,1,3,3–tetraethylisoindoline–2–oxyl–5–sodium sulfonate (TEIOSNa)

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal   +3 more
wiley   +1 more source

DL4GAM: A Multi‐Modal Deep Learning‐Based Framework for Glacier Area Monitoring, Trained and Validated on the European Alps

open access: yesEarth and Space Science
Glaciers play a critical role in our society, impacting everything from sea‐level rise and access to clean water to the tourism industry. Their accelerated melt represents a key indicator of the changing climate, highlighting the need for efficient ...
Codruț‐Andrei Diaconu   +2 more
doaj   +1 more source

Review of SAR imaging geodesy for glacier velocity monitoring

open access: yesGeodesy and Geodynamics
The surface velocity is one of the most important characteristics of glaciers. Monitoring and mapping glacier movements are of great significance for the studies of sea-level rise, glacier mass balance and dynamics, global warming, and the management of ...
Meiling Wen, Teng Wang
doaj   +1 more source

Origin and structure of Devensian depressions at Letton, Herefordshire [PDF]

open access: yes, 2010
Groups of circular to oval enclosed depressions in soft sediments of Pleistocene age are relatively common in north-west Europe. These features are normally interpreted as being either glacial or periglacial in origin.
Astin, Timothy Robin   +2 more
core  

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