A5100457358- Air Quality and Health Impacts
- Indoor Air Quality and Microbial Exposure
- Mercury impact and mitigation studies
- Smoking Behavior and Cessation
- Infection Control and Ventilation
- Heavy metals in environment
- Air Quality Monitoring and Forecasting
- Noise Effects and Management
- Odor and Emission Control Technologies
- Building Energy and Comfort Optimization
- Heavy Metal Exposure and Toxicity
- Coffee research and impacts
- Chromium effects and bioremediation
- Urban Heat Island Mitigation
- Adipose Tissue and Metabolism
- Control Systems and Identification
- Climate Change and Health Impacts
- Stability and Control of Uncertain Systems
- Membrane Separation Technologies
- Water Treatment and Disinfection
- Cannabis and Cannabinoid Research
- Fuzzy Systems and Optimization
- Vehicle emissions and performance
- Conservation Techniques and Studies
- Transportation Planning and Optimization
California Department of Public Health
2013-2024
Hunan University
2022-2024
Nanyang Technological University
2024
Guangxi University
2024
Chongqing University
2022
First Affiliated Hospital of Wenzhou Medical University
2021
Wenzhou Medical University
2021
Central Hospital Affiliated to Shenyang Medical College
2021
Xi’an University
2019
Xi'an University of Technology
2019
Objectives To investigate how the two main electronic (e-) cigarette solvents—propylene glycol (PG) and glycerol (GL)—modulate formation of toxic volatile carbonyl compounds under precisely controlled temperatures in absence nicotine flavor additives. Methods PG, GL, PG:GL = 1:1 (wt/wt) mixture, commercial e-cigarette liquids were vaporized a stainless steel, tubular reactor flowing air ranging up to 318°C simulate vaping. Aerosols collected analyzed quantify amount carbonyls produced with...
Objectives To determine the effect of applied power settings, coil wetness conditions, and e-liquid compositions on heating temperature for e-cigarettes with a “top-coil” clearomizer, to make associations conditions emission toxic carbonyl compounds by combining results herein literature. Methods The second generation e-cigarette was measured at various levels, compositions, including (1) measurements thermocouple three fill levels (dry, wet-through-wick, full-wet), resistances (low,...
Many people spend most of their time in an indoor environment. A positive relationship exists between environmental quality and the health, wellbeing, productivity occupants buildings. The environment is affected by pollutants, such as gases particles. Pollutants can be removed from various ways. Air-cleaning devices are commonly marketed benefiting removal air pollutants and, consequently, improving quality. Depending on type cleaning technology, cleaners may generate undesired toxic...
Emissions of formaldehyde from building materials and furniture can cause adverse health effects. Traditional models generally only consider emissions as a physical process that be characterized by three key parameters: the initial emittable concentration, diffusion coefficient partition coefficient. However, physical-based model causes discrepancy in predicting long-term for cases where chemical reaction (i.e., hydrolysis) occurs over time. In this study, an improved mechanism-based was...
Electronic (e)-cigarette smoking is considered to be less harmful than traditional tobacco because of the lack a combustion process. However, e-cigarettes have potential release chemicals depending on constituents vapor. To date, there has been significant evidence adverse health effects e-cigarette usage. what known are impacts contained in exhaled air from an smoker indoor quality, second-hand passive residents, and toxicity air. In this study, we develop comprehensive numerical model...
Abstract Sulfate radicals have been increasingly used for the pathogen inactivation due to their strong redox ability and high selectivity electron-rich species in last decade. The application of sulfate water disinfection has become a very promising technology. However, there is currently lack reviews inactivated pathogenic microorganisms. At same time, less attention paid by-products produced by use inactivate This paper begins with brief overview radicals’ properties. Then, progress...
Interest in improving ventilation and indoor air quality (IAQ) California schools has grown since the COVID-19 pandemic. This paper presents a field protocol for simultaneous monitoring of usage patterns in-room portable cleaners (PACs), outdoor concentrations composition particulate matter (PM), CO2 as an indicator rates (VRs). was implemented 7-week pilot study four occupied classrooms 2022. Monitoring results showed that VRs PM were generally well maintained studied. One classroom had...
Formaldehyde emissions from fiberglass and polyester filters used in building heating, ventilation, air conditioning (HVAC) systems were measured bench-scale tests using 10 17 cm(2) coupons over 24 to 720 h periods. Experiments performed at room temperature four different relative humidity settings (20, 50, 65, 80% RH). Two flow velocities across the explored: 0.013 0.5 m/s. Fiberglass emitted between 20 1000 times more formaldehyde than under similar RH airflow conditions. Emissions...
Background Identifying the functional materials inside vaping devices can help inform efforts to understand risk. While nicotine E-cigarette components and metals have been characterized in several previous studies, internal component compositions of tetrahydrocannabinol (THC) cartridge designs are not as well known. The 2019–20 e-cigarette or product use associated lung injury (EVALI) outbreak has with THC containing vitamin E acetate (VEA), possibly mediated by chemical reactions high...
This study addresses a robust <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">H</i> <sub xmlns:xlink="http://www.w3.org/1999/xlink">∞</sub> filter design problem for nonlinear stochastic partial differential systems (NSPDSs) with random external disturbance and measurement noise in the spatiotemporal domain. For NSPDSs, through set of sensor measurements needs to solve complex second-order Hamilton Jacobi integral inequality (HJII). In order...
Methylmercury is a neurotoxic compound that can enter rice fields through rainfall or irrigation with contaminated wastewater, and then contaminate the human food chain consumption of rice. Flooded paddy soil has porous structure facilitates air exchange atmosphere, but presence trace amounts oxygen in flooded field its impact on microbial-mediated formation methylmercury still unclear. We compared microbial communities their functions oxygen-depleted oxygen-limited soil. discovered had...
Abstract Introduction The use of electronic vaping products (EVPs) containing nicotine, marijuana, and/or other substances remains prominent among youth; with EVPs nicotine being the most commonly used tobacco product youth since 2014. However, a detailed understanding chemical composition these is limited. Aims and Methods From February 25th to March 15th, 2019, total 576 EVPs, including 233 e-cigarette devices (with 43 disposable vape pens) 343 e-liquid cartridges/pods/bottled e-liquids,...
The purpose of this study was to investigate, in the human respiratory tract, flow patterns and adsorption flux (deposition flux) distributions volatile organic compounds (VOCs) generated by use electronic cigarettes (e-cigarettes) through application a three-dimensional computational fluid dynamics (CFD) analysis. Two types tract models, which give detailed geometries were reproduced using computed tomography data, for CFD analysis inhalation exposure. Complicated patterns, nonuniform VOC...