A5062188541- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Vehicle emissions and performance
- Particle accelerators and beam dynamics
- Toxic Organic Pollutants Impact
- Atmospheric aerosols and clouds
- Superconducting Materials and Applications
- Oil Spill Detection and Mitigation
- Spacecraft and Cryogenic Technologies
- Ionosphere and magnetosphere dynamics
- RNA Interference and Gene Delivery
- Maritime Transport Emissions and Efficiency
- Methane Hydrates and Related Phenomena
- Effects and risks of endocrine disrupting chemicals
- Cyclone Separators and Fluid Dynamics
- Gas Sensing Nanomaterials and Sensors
- Viral Infections and Vectors
- Geophysics and Gravity Measurements
- Environmental Policies and Emissions
- Education, Safety, and Science Studies
- Plant responses to elevated CO2
- Polymer composites and self-healing
University of Houston
2020-2025
Catholic University of Korea
2023-2025
Baylor University
2014-2024
Fermi National Accelerator Laboratory
2024
Korea Institute of Science and Technology
2022
Institute for Basic Science
2014-2019
Abstract The NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP 2 Ex) employed the P-3, Stratton Park Engineering Company (SPEC) Learjet 35, a host of satellites surface sensors to characterize coupling aerosol processes, cloud physics, atmospheric radiation within Maritime Continent’s complex southwest monsoonal environment. Conducted in late summer 2019 from Luzon, Philippines, conjunction with Office Naval Research Propagation Intraseasonal Tropical Oscillations...
Abstract. The tropical Northwest Pacific (TNWP) is a receptor for pollution sources throughout Asia and highly susceptible to climate change, making it imperative understand long-range transport in this complex aerosol-meteorological environment. Measurements from the NASA Cloud, Aerosol, Monsoon Processes Philippines Experiment (CAMP2Ex; 24 August 5 October 2019) back trajectories National Oceanic Atmospheric Administration Hybrid Single Particle Lagrangian Integrated Trajectory Model...
Atmospheric particulate matter (PM) samples were collected from four ground-based sites located in the Houston, TX (September 21-28, 2013) and analyzed for 12 organophosphate esters (OPEs; current-use plasticizers flame retardants). Samples included daytime, nighttime, 24 h PM of <2.5 μm aerodynamic diameter (PM2.5) total suspended (TSP) samples. PM2.5 TSP atmospheric ΣOPE concentrations varied over an order magnitude statistically significantly different between urban suburban industrial...
We measured submicron aerosols (PM1) at a beachfront site in Texas Spring 2021 to characterize the "background" aerosol chemical composition advecting into and factors controlling this composition. Observations show that marine from Gulf of Mexico were highly processed acidic; sulfate was most abundant component (on average 57% total PM1 mass), followed by organic material (26%). These characteristics are similar those observed other locations globally. However, much more polluted;...
Houston, Texas, with its large-scale industrial activities, serves as a national hub for petrochemical processing and chemical feedstock production, making it unique emission region volatile organic compounds (VOCs) production-related emissions. These emissions can be associated including solvent usage production to manufacture consumer products such products. To support the Houston-based Dept. of Energy’s Atmospheric Measurement Radiation program-led Tracking Aerosol Convection ExpeRiment...
Abstract Autonomous polymers that report damage prior to loss of function and simultaneously self-heal are highly relevant for preventing catastrophic failures extending the lifetimes materials. Here, we demonstrate mechanochromic thermally reprocessable thermosets can be used autonomic reporting self-healing coatings. A molecule, spiropyran (SP), is covalently incorporated into thermoreversible Diels–Alder (DA) cross-linking networks. Mechanical activation SPs in DA networks confirmed by...
Abstract Since the coronavirus pandemic, mRNA vaccines have revolutionized field of vaccinology. Lipid nanoparticles (LNPs) are proposed to enhance delivery efficiency; however, their design is suboptimal. Here, a rational method for designing LNPs explored, focusing on ionizable lipid composition and structural optimization using machine learning (ML) techniques. A total 213 analyzed random forest regression models trained with 314 features predict expression efficiency. The models, which...
A new type of microfluidic bioreactor with fibrous micromixers for the ingredient mixing and a long macrochannel in vitro transcription reaction was fabricated continuous production mRNA. The diameter microchannels tuned by using an electrospun microfibrous disc different microfiber diameters. micromixer larger exhibited better performance than others. efficiency increased to 0.95 while mixture passed through micromixers, suggesting complete mixing. To demonstrate mRNA, ingredients were...
Ambient black carbon (BC) has detrimental effects on both human health and near-term global warming. To mitigate these negative effects, there have been significant efforts to reduce emissions of BC from anthropogenic biomass burning sources in California's Bay Area since the 1960s. Recent reductions mainly fossil fuel combustion such as diesel but additional may be needed for contemporary like meat cooking. In this study, PM10 (particulate matter with aerodynamic diameter less than or equal...
Abstract. A novel technique has been developed to measure sulfur dioxide (SO2) using a modification of the existing electrochemical concentration cell (ECC) ozonesonde technology. The current sonde-based method SO2 (i.e., dual-sonde approach) involves launching two ozonesondes together, with one sondes having filter remove at inlet. profile is determined by taking difference between measurements from instruments. works well in typical tropospheric conditions when [O3]>[SO2] but saturates...
To investigate major sources and trends of particulate pollution in Houston, total suspended (TSP) fine matter (PM2.5) samples were collected analyzed. Characterization organic (OC) elemental (EC) carbon combined with realtime black (BC) concentration provided insight into the temporal PM2.5 coarse PM (subtraction from TSP) during Deriving Information on Surface Conditions Column VERtically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) Campaign Houston 2013. Ambient OC, EC, BC...
Changing urban emission landscapes and increasing population make it imperative to understand the driving forces for air quality in growing areas. Recent field studies an industrial area Houston a semiurban San Antonio reveal unique signatures these two Texas cities. A comparison of benzene, toluene, xylenes, isoprene, methyl ethyl ketone (MEK) was conducted locations previous other megacities. It found that had similar ratios as megacities xylenes (1.10, 4.57, 3.60 pptv ppbv−1 CO,...
Abstract. As criteria pollutants from anthropogenic emissions have declined in the US last 2 decades, biomass burning (BB) are becoming more important for urban air quality. Tracking transported BB and their impacts is challenging, especially areas that also burdened by sources like Texas Gulf Coast. During Corpus Christi San Antonio (CCSA) field campaign spring 2021, two long-range-transport events (BB1 BB2) were identified. The observed patterns of an absorption Ångström exponent (AAE), a...