2,590 results match your criteria: "University of Colorado at Boulder.[Affiliation]"

The simulation of metals, oxides, and hydroxides can accelerate the design of therapeutics, alloys, catalysts, cement-based materials, ceramics, bioinspired composites, and glasses. Here we introduce the INTERFACE force field (IFF) and surface models for α-AlO, α-CrO, α-FeO, NiO, CaO, MgO, β-Ca(OH), β-Mg(OH), and β-Ni(OH). The force field parameters are nonbonded, including atomic charges for Coulomb interactions, Lennard-Jones (LJ) potentials for van der Waals interactions with 12-6 and 9-6 options, and harmonic bond stretching for hydroxide ions.

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Patient-generated device data play an important role in diabetes management. However, acquiring these data remains a challenge. This project aimed to understand whether implementing dedicated "Technology Navigator" (TN) personnel at a large academic diabetes clinic could facilitate access to device data without increasing work for clinic staff.

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Opinion disparity in hypergraphs with community structure.

Phys Rev E

September 2023

Department of Applied Mathematics, University of Colorado at Boulder, Boulder, Colorado 80309, USA.

The division of a social group into subgroups with opposing opinions, which we refer to as opinion disparity, is a prevalent phenomenon in society. This phenomenon has been modeled by including mechanisms such as opinion homophily, bounded confidence interactions, and social reinforcement mechanisms. In this paper, we study a complementary mechanism for the formation of opinion disparity based on higher-order interactions, i.

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Making the case for an International Decade of Radiocarbon.

Philos Trans A Math Phys Eng Sci

November 2023

Department of Physics, ETH Zurich, Zurich, Switzerland.

Radiocarbon (C) is a critical tool for understanding the global carbon cycle. During the Anthropocene, two new processes influenced C in atmospheric, land and ocean carbon reservoirs. First, C-free carbon derived from fossil fuel burning has diluted C, at rates that have accelerated with time.

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As part of the CarbonWatch-NZ research programme, air samples were collected at 28 sites around Auckland, New Zealand, to determine the atmospheric ratio () of excess (local enhancement over background) carbon monoxide to fossil CO (COff). Sites were categorized into seven types (background, forest, industrial, suburban, urban, downwind and motorway) to observe around Auckland. Motorway flasks observed of 14 ± 1 ppb ppm and were used to evaluate traffic .

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Background: ICSI (intracytoplasmic sperm injection) leads to a reduced male-to-female ratio at birth, whereas blastocyst transfer results in an increased male-to-female ratio. However, limited knowledge exists regarding the impact of these factors on the live birth rate for each gender. This study aimed to investigate the influence of patient characteristics and treatment parameters on the live birth rate for each gender, as well as the ultimate male-to-female ratio at birth in frozen-thawed embryo transfer (FET) cycles.

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Effects of Genetic Relatedness of Kin Pairs on Univariate ACE Model Performance.

Twin Res Hum Genet

October 2023

Department of Psychology, Wake Forest University, Winston Salem, North Carolina, USA.

The current study explored the impact of genetic relatedness differences (ΔH) and sample size on the performance of nonclassical ACE models, with a focus on same-sex and opposite-sex twin groups. The ACE model is a statistical model that posits that additive genetic factors (A), common environmental factors (C), and specific (or nonshared) environmental factors plus measurement error (E) account for individual differences in a phenotype. By extending Visscher's (2004) least squares paradigm and conducting simulations, we illustrated how genetic relatedness of same-sex twins (H) influences the statistical power of additive genetic estimates (A), AIC-based model performance, and the frequency of negative estimates.

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Characterizing rheological properties and microstructure of thioester networks during degradation.

Soft Matter

October 2023

Department of Chemical and Biomolecular Engineering, Lehigh University, 124 E Morton St, Bethlehem, PA, 18015, USA.

Covalent adaptable networks are designed for applications including cell and drug delivery and tissue regeneration. These applications require network degradation at physiological conditions and on a physiological timescale with microstructures that can: (1) support, protect and deliver encapsulated cells or molecules and (2) provide structure to surrounding tissue. Due to this, the evolving microstructure and rheological properties during scaffold degradation must be characterized.

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Introduction: Incident investigation is a foundational tool of safety management. Determining the causal factors of any incident underpins organizational learning and subsequent positive change to processes and practices. Research of incident investigation has largely focused on what information to collect, how to analyze it, and how to optimize resultant conclusions and organizational learning.

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Article Synopsis
  • - The T2K experiment reports enhanced measurements of neutrino oscillation parameters through new proton-on-target (POT) neutrino data, significantly improving analysis methods with a major focus on the near detector's new selection procedures.
  • - This analysis is the first to utilize data from the NA61/SHINE experiment, helping to refine the neutrino flux model and enhance the neutrino interaction model by incorporating new nuclear effects.
  • - Both frequentist and Bayesian approaches indicate a preference for normal mass ordering and a nearly maximal CP-violating phase, with notable exclusions and constraints on certain parameters aligning with past T2K studies.
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Identification and functional analysis of senescent cells in the cardiovascular system using omics approaches.

Am J Physiol Heart Circ Physiol

November 2023

Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States.

Cardiovascular disease (CVD) is a leading cause of morbidity and mortality worldwide, and senescent cells have emerged as key contributors to its pathogenesis. Senescent cells exhibit cell cycle arrest and secrete a range of proinflammatory factors, termed the senescence-associated secretory phenotype (SASP), which promotes tissue dysfunction and exacerbates CVD progression. Omics technologies, specifically transcriptomics and proteomics, offer powerful tools to uncover and define the molecular signatures of senescent cells in cardiovascular tissue.

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There are substantial concerns that extended exposures to weak radiofrequency (RF) fields can lead to adverse health effects. In this study, HT-1080 fibrosarcoma cells were simultaneously exposed to a static magnetic flux density between 10 [Formula: see text] and 300 [Formula: see text] and RF magnetic fields with amplitudes ranging from 1 nT to 1.5 μT in the frequency range from 1.

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Objectives: The glucocorticoid receptor (GR) is a well-studied, ligand-activated transcription factor and a common target of anti-inflammatory treatments. Recently, several studies have drawn attention the effects of binding of GR to RNA rather than DNA and the potential implications of this activity for GR function. The objective of our study was to further characterize the relationship between GR function and RNA binding by measuring changes in the glucocorticoid-driven transcriptome in the presence of a GR mutant that exhibited reduced RNA affinity.

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Article Synopsis
  • The study examined the genetic basis of various structural features of the human cerebral cortex using data from over 36,000 individuals and identified 4,349 significant genetic locations linked to cortical traits.
  • Researchers explored 13 different phenotypes, including thickness, surface area, and water diffusion, and found four genetic structures that suggest different developmental gene expression paths.
  • The findings highlight complex relationships among the identified phenotypes and suggest that genetic variants related to cortical expansion may also be linked to certain head disorders, emphasizing the genetic organization of the cortex and its developmental implications.
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Backgruound: While the triglyceride-glucose (TyG) index is a measure of insulin resistance, its association with cardiovascular disease (CVD) has not been well elucidated. We evaluated the TyG index for prediction of CVDs in a prospective large communitybased cohort.

Methods: Individuals 40 to 70 years old were prospectively followed for a median 15.

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The shared genetic risk architecture of neurological and psychiatric disorders: a genome-wide analysis.

medRxiv

September 2023

NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.

While neurological and psychiatric disorders have historically been considered to reflect distinct pathogenic entities, recent findings suggest shared pathobiological mechanisms. However, the extent to which these heritable disorders share genetic influences remains unclear. Here, we performed a comprehensive analysis of GWAS data, involving nearly 1 million cases across ten neurological diseases and ten psychiatric disorders, to compare their common genetic risk and biological underpinnings.

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Article Synopsis
  • Major depressive disorder shows varied symptoms, and genetic analysis can help identify specific subtypes and clinical profiles.
  • Challenges in integrating symptom data arise from differences in sample sizes and patterns of missing data in clinical vs. community groups.
  • The study used genome-wide association studies to find that a model including unique symptom factors and accounting for missing data best represented the symptoms of depression, highlighting the need to consider symptom directionality and study design when analyzing genetic data.
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Abundance surveys are commonly used to estimate plant or animal densities and frequently require estimating detection probabilities to account for imperfect detection. The estimation of detection probabilities requires additional measurements that take time, potentially reducing the efficiency of the survey when applied to high-density populations. We conducted quadrat, removal, and distance surveys of zebra mussels () in three central Minnesota lakes and determined how much survey effort would be required to achieve a pre-specified level of precision for each abundance estimator, allowing us to directly compare survey design efficiencies across a range of conditions.

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The management of Soil Organic Carbon (SOC) is a critical component of both nature-based solutions for climate change mitigation and global food security. Agriculture has contributed substantially to a reduction in global SOC through cultivation, thus there has been renewed focus on management practices which minimize SOC losses and increase SOC gain as pathways towards maintaining healthy soils and reducing net greenhouse gas emissions. Mechanistic models are frequently used to aid in identifying these pathways due to their scalability and cost-effectiveness.

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Affect regulation often is disrupted in depression. Understanding biomarkers of affect regulation in ecologically valid contexts is critical for identifying moments when interventions can be delivered to improve regulation and may have utility for identifying which individuals are vulnerable to psychopathology. Autonomic complexity, which includes linear and nonlinear indices of heart rate variability, has been proposed as a novel marker of neurovisceral integration.

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Supramolecular Liquid Crystal Carbon Dots for Solvent-Free Direct Ink Writing.

Adv Mater

October 2023

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.

Recent years have witnessed the major advances of nanolights with extensive exploration of nano-luminescent materials like carbon dots (CDs). However, solvent-free processing of these materials remains a formidable challenge, impeding endeavors to develop advanced manufacturing techniques. Herein, in response to this challenge, liquid crystallization is demonstrated as a versatile and robust approach by deliberately anchoring flexible alkyl chains on the CDs surface.

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Airborne observations over the North Atlantic Ocean reveal the importance of gas-phase urea in the atmosphere.

Proc Natl Acad Sci U S A

June 2023

Department of Earth and Environmental Science, Centre for Atmospheric Science, University of Manchester, Manchester M13 9PL, United Kingdom.

Reduced nitrogen (N) is central to global biogeochemistry, yet there are large uncertainties surrounding its sources and rate of cycling. Here, we present observations of gas-phase urea (CO(NH)) in the atmosphere from airborne high-resolution mass spectrometer measurements over the North Atlantic Ocean. We show that urea is ubiquitous in the lower troposphere in the summer, autumn, and winter but was not detected in the spring.

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We investigate the microhydration structures of complexes of alkaline earth dications and ethylenediaminetetraacetic acid (EDTA) for up to two water molecules, using cryogenic ion vibrational spectroscopy in concert with density functional theory (DFT). The interaction with water shows a clear dependence on the chemical identity of the bound ion. For Mg, microhydration mostly involves the carboxylate groups of EDTA and does not entail direct contact with the dication.

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