A5045107570- Mass Spectrometry Techniques and Applications
- Particle Dynamics in Fluid Flows
- Atmospheric chemistry and aerosols
- Aerosol Filtration and Electrostatic Precipitation
- Coagulation and Flocculation Studies
- Electrohydrodynamics and Fluid Dynamics
- nanoparticles nucleation surface interactions
- Ion-surface interactions and analysis
- Atmospheric Ozone and Climate
- Analytical Chemistry and Chromatography
- Infection Control and Ventilation
- Heart Failure Treatment and Management
- Atmospheric and Environmental Gas Dynamics
- Analytical chemistry methods development
- Fluid Dynamics and Heat Transfer
- Dust and Plasma Wave Phenomena
- Spectroscopy and Quantum Chemical Studies
- Natural Language Processing Techniques
- Electrostatics and Colloid Interactions
- Atmospheric aerosols and clouds
- Pesticide Residue Analysis and Safety
- Speech and dialogue systems
- Cyclone Separators and Fluid Dynamics
- Air Quality and Health Impacts
- Protist diversity and phylogeny
University of Minnesota
2016-2025
Twin Cities Orthopedics
2019-2025
University College London Hospitals NHS Foundation Trust
2025
University College London
2025
Gaertner (United States)
2025
Austin Hospital
2018-2024
Austin Health
2024
Massachusetts General Hospital
2024
University of California, Riverside
2024
University of Minnesota System
2014-2023
Ion/electrical mobility measurements of nanoparticles and polyatomic ions are typically linked to particle/ion physical properties through either application the Stokes–Millikan relationship or comparison mobilities predicted from models, which assume that gas molecules scatter specularly elastically rigid structural models. However, there is a discrepancy between these approaches; when specular, elastic scattering models (i.e., elastic-hard-sphere scattering, EHSS) applied nanometer-scale...
Macroporous particle photocatalysts can be produced using polystyrene latex (PSL) colloidal templating (see figure), which used for organic waste degradation. The rate of degradation is similar to that nanoparticles. particles have lower mechanical mobilities than nanoparticles and easily collected recovered repeated use.
The aerosolization and collection of submicrometre ultrafine virus particles were studied with the objective developing robust accurate methodologies to study airborne viruses.The efficiencies three sampling devices used sample biological - All Glass Impinger 30, SKC BioSampler a frit bubbler evaluated for particles. Test aerosol produced by atomizing suspensions single-stranded RNA double-stranded DNA bacteriophages. Size distribution results show that fraction viruses present in typical...
Abstract. Air was sampled from the porous firn layer at NEEM site in Northern Greenland. We use an ensemble of ten reference tracers known atmospheric history to characterise transport properties site. By analysing uncertainties both data and gas histories, we can objectively assign weights each gases used for depth-diffusivity reconstruction. define objective root mean square criterion that is minimised model tuning procedure. Each tracer constrains profile differently through its unique...
The mechanism of the multiple charging macromolecules in electrospray ionization (ESI) continues to inspire debate and controversy. Recently, we proposed that number charges on a macromolecule is determined by emission small charge carriers from macromolecule-containing nanodroplets that, after solvent evaporation, remaining transferred macromolecule. In this study, tested applicability new theory for macromolecular, positive-ion ESI mass spectrometry measuring mean states distributions...
In patients with heart failure (HF), increased arginine vasopressin concentrations are associated more severe disease, making an attractive target for therapy. However, AVP is difficult to measure due its in vitro instability and rapid clearance. Copeptin, the C-terminal segment of preprovasopressin, a stable reliable surrogate biomarker serum concentrations.The Biomarkers Acute Heart Failure (BACH) trial was 15-center, diagnostic prognostic study 1641 acute dyspnea; 557 HF were included...
The validity of the Stokes-Millikan equation is examined in light mass and mobility measurements clusters ionic liquid 1-ethyl-3-methyl-imidazolium tetrafluoroborate (EMI-BF4) ambient air. diameter dZ based on measured law compared with volume dv , which generalizes for binary substances such as salts. sum anion cation volumes cluster corrected void fraction bulk liquid. For > 1.5 nm, d Z within 1.4% + 0.3 nm. smaller 3.84 14.3% deviations are observed at = 1.21 nm 0.68 respectively. These...
Biomarkers have proven their ability in the evaluation of cardiopulmonary diseases. We investigated utility concentrations biomarker procalcitonin (PCT) alone and with clinical variables for diagnosis pneumonia patients presenting to emergency departments (EDs) a chief complaint shortness breath.The BACH trial was prospective, international, study 1641 EDs dyspnoea. Blood samples were analysed PCT other biomarkers. Relevant data also captured. Patient outcomes assessed at 90 days. The made...
Aerosol generation with modes of oxygen therapy such as high-flow nasal cannula and noninvasive positive-pressure ventilation is a concern for healthcare workers during the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. The amount aerosol from tract these various modalities unknown.
Aggregation is a known consequence of nanoparticle use in biology and medicine; however, characterization typically performed under the pretext well-dispersed, aqueous conditions. Here, we systematically characterize effects aggregation on alternating magnetic field induced heating resonance (MR) imaging performance iron oxide nanoparticles (IONPs) non-ideal biological systems. Specifically, behavior IONP aggregates composed ~10 nm primary particles, but with aggregate hydrodynamic sizes...
A parallel-plate differential mobility analyzer and a time-of-flight mass spectrometer (DMA-MS) are used in series to measure true dry atmospheric pressure air for mass-resolved electrosprayed GroEL tetradecamers (14-mers; ~800 kDa). Narrow peaks found (2.6-2.9% fwhm); hence, precise mobilities can be obtained these ions without collisional activation, just following their generation by electrospray ionization. In contrast previous studies, two conformers with (Z) differing ~5% at charge...
A benchmark comparison between two ion mobility and collision cross-section (CCS) calculators, MOBCAL IMoS, is presented here as a standard to test the efficiency performance of both programs. Utilizing 47 organic ions, results are in excellent agreement IMoS He N2, when programs use identical input parameters. Due more efficiently written algorithm its parallelization, able calculate same CCS (within 1%) with speed around orders magnitude faster than counterpart seven cores used. high...
Interprofessional education needs a stronger theoretical basis informed by the challenges facing collaboration across professions. This study explores impact of power distance (perception role hierarchy), on team effectiveness as mediated cohesion and psychological safety (believe one can speak up without fear negative consequences). Furthermore, it tests for differences between medical nursing students in these concepts. Final-year completed paper survey constructs at end three-session, 6-h...
Rapid detection of volatile organic compounds (VOCs) is growing in importance many sectors. Noninvasive medical diagnoses may be based upon particular combinations VOCs human breath; detecting emitted from environmental hazards such as fungal growth could prevent illness; and waste reduced through monitoring gases produced during food storage. Electronic noses have been applied to problems, however, a common limitation improving selectivity. Graphene an adaptable material that can...