Results 41 to 50 of about 47,504 (266)

Phylogenomic insights into the genus Tulipa (Liliaceae): Taxonomy, evolution, and biogeography

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Tulips are one of the best‐known geophytes, but their taxonomy remains convoluted and their evolutionary history poorly understood. Here, we used plastid genomes to identify some issues with current classification, understand the diversification history of the genus, and identify potential species linked to historical cultivation ...
Brett Wilson   +17 more
wiley   +1 more source

Speech Biomarkers for Quantifying Effects of Subthalamic Deep Brain Stimulation in Parkinson's Disease

open access: yesAnnals of Neurology, EarlyView.
Objective Dysarthria is one of the most common and disabling side effects of subthalamic nucleus deep brain stimulation (STN‐DBS) in Parkinson's disease (PD). Stimulation often exacerbates speech dysfunction beyond the effects of PD progression, likely because of current spread to structures surrounding the STN.
Petr Krýže   +17 more
wiley   +1 more source

ESTIMATION OF THE ASYMMETRIC VERTICAL VARIATION OF THE SOUTHERN AND NORTHERN HEMISPHERES OF THE EARTH

open access: yesГеодинамика и тектонофизика, 2015
In previous studies, the northern hemisphere of the Earth is considered to be in compression while the southern one is in expansion. In this study, based on three different methods, we calculate average vertical variations of the two hemispheres from ...
Wen-Bin Shen Wen-Bin Shen   +3 more
doaj   +1 more source

Monitoring Antiseizure Medication Change Using Ultra Long‐Term Electroencephalogram: A Multicenter Study

open access: yesAnnals of Neurology, EarlyView.
Objective Medication dose adjustments are common in treatment‐resistant epilepsy, but lack robust evidence, and patient‐reported seizure diaries have known limitations. We assessed whether ultra long‐term subcutaneous electroencephalogram (sqEEG) improves detection of seizure frequency changes after antiseizure medication adjustments.
Pedro F. Viana   +20 more
wiley   +1 more source

Effect of interplanetary magnetic field Bx on the polar electrojets as observed by CHAMP and Swarm satellites

open access: yesEarth and Planetary Physics
Based on 16 years of magnetic field observations from CHAMP and Swarm satellites, this study investigates the influence of the Interplanetary Magnetic Field (IMF) Bx component on the location and peak current density of the polar electrojets (PEJs).
Hui Wang, ChengZhi Wang, YunFang Zhong
doaj   +1 more source

Drivers of hemispheric differences in return dates of mid-latitude stratospheric ozone to historical levels [PDF]

open access: yesAtmospheric Chemistry and Physics, 2013
Chemistry-climate models (CCMs) project an earlier return of northern mid-latitude total column ozone to 1980 values compared to the southern mid-latitudes.
H. Garny   +4 more
doaj   +1 more source

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

open access: yesThe Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

The stratospheric Brewer–Dobson circulation under different phases of the Stratospheric Polar Vortex Oscillation combined with different phases of the Quasi-Biennial Oscillation

open access: yesEarth and Planetary Physics
Using long-term Whole Atmosphere Community Climate Model version 5 (WACCM5) simulations initialized with the climatology around the year 2000, we studied the anomalous distribution of planetary wave and gravity wave fluxes during distinct phases of the ...
ZiXuan Yu   +3 more
doaj   +1 more source

An Arbovirus Cline across the Northern Hemisphere

open access: yesVirology, 1995
The mode and tempo of arbovirus evolution and dispersal can help to explain the dynamics of pandemics, viral outbreaks, and emerging viruses. By comparing nucleotide and deduced amino acid sequences of their envelope proteins, we describe the continuous distribution of the tick-borne encephalitis (TBE) complex viruses, the most important flaviviruses ...
de A. Zanotto, P.M.   +7 more
openaire   +2 more sources

Endothermy, neuron counts, and other issues: Further remarks on neurocognitive evolution in fossil vertebrates

open access: yesThe Anatomical Record, EarlyView.
Abstract Last year, we challenged the view that large‐bodied theropod dinosaurs such as Tyrannosaurus rex resembled primates in cognition and behavior, a proposition made by Herculano‐Houzel in 2023. More recently, Jensen et al. have criticized our work on this topic, raising methodological and conceptual issues.
Kai R. Caspar   +5 more
wiley   +1 more source

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