C. Webb results 216
· Newest (Page 1/9, per page 25)
Author: C. Webb ×Clear All Filters
Search Results
Differential metabolomic effects of progestagen-based estrus synchronisation in South African Dohne Merino ewesNARA Subscribed
This study represents one of the first to comprehensively profile the homeostatic cervicovaginal metabolome of South African Dohne Merino ewes using liquid chromatography high resolution mass spectrophotometry (LC-HRMS) and compare that metabolome immediately after estrus synchronisation using progestagen intravaginal pessaries. As the use of assisted reproductive technologies gains traction in various livestock production sys...
Post-prandial acyl ghrelin infusion in heart failure patients increases gastric emptying rateNARA Subscribed
Acyl ghrelin increases cardiac output (CO) and contractility in patients with heart failure with reduced ejection fraction (HFrEF). In healthy humans, acyl ghrelin increases gastric emptying rate (GER) and hunger, a potential add-on benefit for HFrEF patients suffering from cachexia with symptoms of delayed gastric emptying and loss of appetite. The aim of this study was to determine if post-prandial acyl ghrelin infusion incr...
Interpretable deep learning reveals spatiotemporal MRI features of brain aging that align with neurodegenerationNARA Subscribed
Cortical thinning and atrophy are hallmarks of brain aging that have been characterized using magnetic resonance imaging (MRI). Brain aging involves many neuroanatomic features whose effects on brain structure remain unexplored. To address this challenge, we trained interpretable deep neural networks (DNNs) to estimate brain age (BA) from T 1 -weighted ( T 1 w) MRI. By identifying MRI features unapparent to humans, DNNs can fi...
SNAPSHOT USA 2024: Year 6 of the Coordinated National Camera Trap Survey of the United StatesNARA Subscribed
Motivation SNAPSHOT USA is an annual, multi‐contributor camera trap survey of mammals across the United States. The growing SNAPSHOT USA dataset is intended for tracking the spatial and temporal responses of mammal populations to changes in land use, land cover and climate. These data will be useful for exploring the drivers of spatial and temporal changes in relative abundance and distribution, as well as the impacts of speci...
Comparison of machine learning interpolation models for movement trajectories of desert bighorn sheepNARA Subscribed
Global positioning system (GPS) collars have revolutionized wildlife monitoring by enabling fine-scale inference of animal movement, behavior, and habitat use. However, GPS fix failures associated with terrain, canopy, or animal behavior introduce bias into downstream ecological analyses. In a study of 16 translocated desert bighorn sheep ( Ovis canadensis mexicana ) in Sonora, Mexico, we recorded 55,277 scheduled GPS fixes ov...
Alzheimer’s disease (AD) disproportionately affects women and carriers of the apolipoprotein E ε4 allele (APOE4), yet little is known about how sex and APOE interact to influence white matter (WM) integrity during disease progression. We integrated diffusion MRI and matched blood transcriptomic data to investigate these interactions and their underlying biological mechanisms. WM microstructure was quantified using diffusion te...
Evaluating a Tri-Institutional Cancer Research Capacity-Building Program for Early-Stage InvestigatorsNARA Subscribed
The Comprehensive Partnerships to Advance Cancer Health Equity (CPACHE) initiative of the National Cancer Institute (NCI) supports long-standing collaborations between an under-resourced institution and NCI-designated Cancer Centers to strengthen cancer research workforce and advance cancer research capacity. One of the longest continuously funded CPACHE programs is the Morehouse School of Medicine/Tuskegee University/Universi...
The high levels of broad-spectrum insecticides used to manage invertebrates in many cities around the world has significant environmental and health impacts. Integrated pest management (IPM) is a framework for sustainable pest control practice, but uptake of IPM remains low in most cities. We used participatory action research with pest management industry stakeholders (practitioners, industry representatives, researchers and...
Implications of flooding events for the green‐lipped mussels ( Perna canaliculus ): an aquatic health perspectiveNARA Subscribed
Flood events are increasingly impacting coastal infrastructures and marine organisms. Prominent among these organisms, the green‐lipped mussel, Perna canaliculus , is an important marine ecosystem engineer and one of New Zealand’s key aquaculture species. Although relatively robust, the species may have limited capacity to tolerate acute environmental shocks such as exposure to riverine floodwater. As flood events become more...
Establishment, current status and possible origin of the greater white-toothed shrew Crocidura russula in Great BritainNARA Subscribed
Great Britain has three native shrews, while the greater white-toothed shrew (GWT: Crocidura russula ) is native to the European continent and some Channel islands. The GWT shrew was first reported in northern England in 2022. We detail its immediate investigation through national authorities, non-government bodies and individuals. Sixteen GWT were among 595 small mammals live-trapped. Barn owl pellet analysis revealed 56 GWT...
When is a knowledge gap filled in environmental monitoring?NARA Subscribed
A Review of Abrupt Permafrost Thaw: Definitions, Usage, and a Proposed Conceptual FrameworkNARA Subscribed
Purpose of Review We review how ‘abrupt thaw’ has been used in published studies, compare these definitions to abrupt processes in other Earth science disciplines, and provide a definitive framework for how abrupt thaw should be used in the context of permafrost science. Recent Findings We address several aspects of permafrost systems necessary for abrupt thaw to occur and propose a framework for classifying permafrost process...
Blue carbon ecosystems such as seagrass meadows, mangrove forests, and salt marshes are important carbon sinks that can store carbon for millennia. Recently, organic matter sulfurization and pyritization have been proposed as mechanisms of net carbon storage in blue carbon ecosystems. At our study site, organic sulfur that is resistant to acid hydrolysis (protokerogen) is an order of magnitude less abundant than pyrite sulfur,...