3,466 results match your criteria: "Ga. 30332 U.S.A.; Yerkes Regional Primate Research Center of Emory University[Affiliation]"

Disparities in autism research and practices based on race and ethnicity are evident across many outcomes and life course stages. However, most of the research has focused on outlining differences and not the underlying systemic inequities driving these disparities. In this conceptual paper, we aim to shift the focus by outlining mechanisms of structural racism within the institutions of science, healthcare, and residential segregation and educational systems in the United States (U.

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Climate change poses direct and indirect threats to public health, including exacerbating air pollution. However, the influence of rising temperature on air quality remains highly uncertain in the United States, particularly under rapid reduction in anthropogenic emissions. Here, we examined the sensitivity of surface-level fine particulate matter (PM) and ozone (O) to summer temperature anomalies in the contiguous US as well as their decadal changes using high-resolution datasets generated by machine learning.

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An organic electrochemical neuron for a neuromorphic perception system.

Proc Natl Acad Sci U S A

January 2025

Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL 60208.

Human perception systems are highly refined, relying on an adaptive, plastic, and event-driven network of sensory neurons. Drawing inspiration from Nature, neuromorphic perception systems hold tremendous potential for efficient multisensory signal processing in the physical world; however, the development of an efficient artificial neuron with a widely calibratable spiking range and reduced footprint remains challenging. Here, we report an efficient organic electrochemical neuron (OECN) with reduced footprint (<37 mm) based on high-performance vertical OECT (vOECT) complementary circuitry enabled by an advanced n-type polymer for balanced p-/n-type vOECT performance.

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The overlapping molecular pathophysiology of Alzheimer's Disease (AD), Amyotrophic Lateral Sclerosis (ALS), and Frontotemporal Dementia (FTD) was analyzed using relationships from a knowledge graph of 33+ million biomedical journal articles. The unsupervised learning rank aggregation algorithm from SemNet 2.0 compared the most important amino acid, peptide, and protein (AAPP) nodes connected to AD, ALS, or FTD.

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Classical preimplantation embryo culture is performed in static fluid environments. Whether a dynamic fluid environment, like the fallopian tube, is beneficial for embryo development remains to be determined across mammalian species. Objectives of these proof-of-concept studies were to determine if controllable dynamic microfluidic culture would enhance preimplantation murine, bovine, and human embryo development compared to static culture.

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A primary challenge following severe musculoskeletal trauma is incomplete muscle regeneration. Current therapies often fail to heal damaged muscle due to dysregulated healing programs and insufficient revascularization early in the repair process. There is a limited understanding of the temporal changes that occur during the early stages of muscle remodeling in response to engineered therapies.

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Nanoscale Fourier transform infrared (Nano-FTIR) imaging and spectroscopy correlated with photoluminescence measurements of lunar Apollo samples with different surface radiation exposure histories reveal distinct physical and chemical differences associated with space weathering effects. Analysis of two sample fragments: an ilmenite basalt (12016) and an impact melt breccia (15445) show evidence of intrinsic or delivered Nd and an amorphous silica glass component on exterior surfaces, whereas intrinsic Cr and/or trapped electron states are limited to interior surfaces. Spatially localized 1050 cm/935 cm band ratios in Nano-FTIR hyperspectral maps may further reflect impact-induced shock nanostructures, while shifts in silicate band positions indicate accumulated radiation damage at the nanoscale from prolonged space weathering due to micrometeorites, solar wind, energetic x-rays and cosmic ray bombardment.

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Article Synopsis
  • Neurons communicate information through variable action potentials that can differ significantly with each stimulus repetition.
  • The study investigates the reliability of cortical neurons when stimulated with simulated synaptic inputs and finds that parvalbumin+ (PV) interneurons exhibit high spiking reliability compared to excitatory neurons.
  • This high reliability in PV interneurons enables precise inhibition of other neurons, while the variability in excitatory neurons allows for better integration of synaptic inputs, ultimately influencing how information is processed in the brain.
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Per- and polyfluoroalkyl substances (PFASs) have recently garnered considerable concerns regarding their impacts on human and ecological health. Despite the important roles of polyamide membranes in remediating PFASs-contaminated water, the governing factors influencing PFAS transport across these membranes remain elusive. In this study, we investigate PFAS rejection by polyamide membranes using two machine learning (ML) models, namely XGBoost and multimodal transformer models.

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Human brain aging is associated with dysregulation of cell type epigenetic identity.

Geroscience

December 2024

Department of Ecology, Evolution, and Marine Biology, Department of Molecular, Cellular, and Cell Biology, Neuroscience Research Institute, University of California, Santa Barbara, CA, 93106, USA.

Significant links between aging and DNA methylation are emerging from recent studies. On the one hand, DNA methylation undergoes changes with age, a process termed as epigenetic drift. On the other hand, DNA methylation serves as a readily accessible and accurate biomarker for aging.

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Recombinant antibodies are a promising class of therapeutics to treat protein misfolding associated with neurodegenerative diseases, and several antibodies that inhibit aggregation are approved or in clinical trials to treat Alzheimer's disease. Here, we developed antibodies targeting the aggregation-prone β-propeller olfactomedin (OLF) domain of myocilin, variants of which comprise the strongest genetic link to glaucoma and cause early onset vision loss for several million individuals worldwide. Mutant myocilin aggregates intracellularly in the endoplasmic reticulum (ER).

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Objective: To detect and classify features of stigmatizing and biased language in intensive care electronic health records (EHRs) using natural language processing techniques.

Materials And Methods: We first created a lexicon and regular expression lists from literature-driven stem words for linguistic features of stigmatizing patient labels, doubt markers, and scare quotes within EHRs. The lexicon was further extended using Word2Vec and GPT 3.

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Background: Chronic pain following traumatic stress exposure (TSE) is common. Increasing evidence suggests inflammatory/immune mechanisms are induced by TSE, play a key role in the recovery process versus development of post-TSE chronic pain, and are sex specific. In this study, we tested the hypothesis that the inflammatory marker C-reactive protein (CRP) is associated with chronic pain after TSE in a sex-specific manner.

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Article Synopsis
  • The study analyzes how a boundary between a passive fluid and an active fluid made of microtubules behaves, especially under turbulence-like conditions.
  • It finds that strong active flows cause the boundary to have pronounced asymmetries and local vortices, which disrupts spatial symmetry and leads to significant fluctuations at the interface.
  • As the activity level increases, the interface deforms more dramatically, eventually folding in on itself and creating a foam-like structure with passive droplets embedded within the active fluid.
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Protein misfolding is a widespread phenomenon that can result in the formation of protein aggregates, which are markers of various disease states, including Alzheimer's disease (AD). In AD, amyloid beta (Aβ) peptides are key players in the disease's progression, particularly the 40- and 42- residue variants, Aβ40 and Aβ42. These peptides aggregate to form amyloid plaques and contribute to neuronal toxicity.

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High-temperature high-k polyolefin by rational molecular design.

Proc Natl Acad Sci U S A

December 2024

Electrical Insulation Research Center, Institute of Materials Science, University of Connecticut, Storrs, CT 06269.

Article Synopsis
  • - Polymer film dielectrics are preferred for energy storage because they offer advantages like high breakdown strength, low dielectric loss, and easy processing, while the move towards high-density renewables increases the demand for high-temperature, high-k polymers.
  • - A new design method enhances high-temperature polyolefins' dielectric constant by integrating phenyl pendants into their structure, allowing for better dielectric properties while still maintaining high thermal stability.
  • - The resulting polymer, m-PNB-BP, achieves a notable dielectric constant of 4 at 150 °C and a discharged density of 8.6 J/m at 660 MV/m, presenting a promising approach for developing polymers ideal for capacitive energy storage under harsh conditions.
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Lipid-protein interactions are crucial for virtually all biological processes in living cells. However, existing structural databases focusing on these interactions are limited to integral membrane proteins. A systematic understanding of diverse lipid-protein interactions also encompassing lipid-anchored, peripheral membrane and soluble lipid binding proteins remains to be elucidated.

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This study estimates temporal trajectories and sociodemographic disparities in underage adolescent binge drinking in the United States over the past four decades. By compiling 47 waves of national representative data from the Monitoring the Future (MTF) study between 1976 and 2022, we analyzed two types of adolescent binge drinking behaviors, past-two-week excessive drinking and drunkenness in the past 30 days, using the innovative modified Poisson (mixture) approach to grouped and right-censored counts (GRC). The overall decrease in incidence rates was attributable to substantial reductions in the risks of excessive drinking (45.

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Evaluating coarse PM composition and sources based on bulk and molecular speciation of PM and PM in Nanjing, East China.

J Environ Sci (China)

June 2025

Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address:

To understand the differences in the composition and sources of PM and PM caused by coarse particles, integrated PM and PM samples were synchronously collected in Nanjing, East China, in summer 2020 and winter 2020/2021. Bulk and molecular speciation and light absorption measurements of aerosol extracts were performed, followed by positive matrix factorization (PMF) based on the PM and PM data sets, respectively. The difference in average concentrations of total bulk species between PM and PM was mainly caused by the distribution of considerable NO, SO, Ca, and organic carbon (OC) in coarse particles.

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Natural fatty acids are attractive carrier materials for drug delivery, but their rapid dissolution and degradation in vivo calls for new strategies to enhance their stability. Here we report a simple and versatile method capable of photo-crosslinking carriers made of natural fatty acids for drug delivery under controlled release. By optimizing the crosslinking density, the nanoscale carriers show a high drug loading efficiency, together with a stable network structure for minimal degradation in a body fluid mimic.

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Cellular senescence is a prominent accomplice of aging. The expression of gene p16ink4a has been established as a biomarker of cellular senescence in humans and animal models. However, it has not been extensively studied in clinical settings in the context of natural aging and the development of age-related diseases.

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Social Buffering of PTSD: Longitudinal Effects and Neural Mediators.

Biol Psychiatry Cogn Neurosci Neuroimaging

November 2024

Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, 30329, USA. Electronic address:

Article Synopsis
  • This study investigates how early social support after trauma affects PTSD symptoms over time and explores specific brain regions involved in this process, such as the amygdala and ventromedial prefrontal cortex.
  • Using data from 315 participants in the AURORA study, researchers measured PTSD symptoms and perceived emotional support at multiple time points, while also conducting neuroimaging two weeks post-trauma.
  • The results show that early emotional support is linked to changes in white matter connectivity between key brain areas, but it also highlighted unexpected increased threat reactivity in the default mode network, suggesting complex neural pathways in response to social threats.
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Article Synopsis
  • Sports-related concussions often lead to cognitive issues, especially in younger individuals, although most symptoms resolve within a week.
  • This study utilized a swine model to analyze how single and repeated head rotations affect brain activity (measured by rs-EEG) in piglets during the first week post-injury.
  • Results showed that healthy piglets displayed stable brain activity metrics, while repeated head rotations led to a temporary increase in alpha power on the first day post-injury, indicating potential changes in brain function.
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Article Synopsis
  • Aging leads to an increase in diseases due to the development of senescent cells that stop dividing and contribute to altered immune responses.
  • The senescence-associated secretory phenotype (SASP) aims to recruit immune cells to clear damaged cells, but it can inadvertently cause surrounding cells to also become senescent, leading to chronic inflammation known as "inflammaging."
  • An interdisciplinary approach combining biomaterials, microfluidics, and spatial omics is proposed to better understand the aging process and its effects on diseases, highlighting the importance of cellular interactions in tissue environments.
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