A5027131480- Air Quality and Health Impacts
- Occupational exposure and asthma
- Occupational and environmental lung diseases
- Indoor Air Quality and Microbial Exposure
- Occupational Health and Safety Research
- Inhalation and Respiratory Drug Delivery
- Risk and Safety Analysis
- Cyclone Separators and Fluid Dynamics
- Aerosol Filtration and Electrostatic Precipitation
- Nanoparticles: synthesis and applications
- Air Quality Monitoring and Forecasting
- Chemical Safety and Risk Management
- Smart Materials for Construction
- Heart Rate Variability and Autonomic Control
- Environmental Impact and Sustainability
- Drilling and Well Engineering
- Nuclear and radioactivity studies
- Wind and Air Flow Studies
- Water Quality Monitoring and Analysis
- Toxic Organic Pollutants Impact
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Carcinogens and Genotoxicity Assessment
- Ergonomics and Human Factors
- Burn Injury Management and Outcomes
National Institute for Occupational Safety and Health
2013-2023
Health Effects Institute
2020
Morgantown High School
2020
Centers for Disease Control and Prevention
2018
Mining or processing asbestos minerals can liberate isolated fibers fiber bundles regulated as airborne fibers. Coarsely crystalline amphibole are more common than in many geologic environments, and disturbance result the release of prismatic acicular single crystals cleavage fragments resembling but that not currently asbestos. Bulk samples six coarsely amphiboles their five analogs were processed to maximize number particles meeting criterion for counting under current U.S. National...
The objective of this present study was to evaluate the performance a portable gas chromatograph-photoionization detector (GC-PID), under various test conditions determine if it could be used in occupational settings. A mixture 7 volatile organic compounds (VOCs)—acetone, ethylbenzene, methyl isobutyl ketone, toluene, m-xylene, p-xylene, and o-xylene—was selected because its components are commonly paint manufacturing industries. full-factorial combination 4 concentration levels (exposure...
Objectives To describe the effect of monopolar electrocautery (EC) settings on surgical plume particulate concentration during pediatric tonsillectomy. Study Design Cross‐sectional study. Setting Tertiary medical center. Subjects and Methods During total tonsillectomy exclusively performed with EC, air was sampled a surgeon‐worn portable particle counter. The airborne mean maximum concentrations were compared for EC at 12 W vs 20 W, smoke evacuation system (SES) no (NS). Results A 36...
Objectives To assess the exposure of surgical personnel to known carcinogens during pediatric tonsillectomy and adenoidectomy (T&A) compare efficacy smoke evacuation systems T&A. Study Design Prospective, case series. Setting Tertiary children’s hospital. Subjects Methods The present study assessed operating room workers’ chemical compounds aerosolized particulates generated We also investigated effect 3 different smoke‐controlling methods: smoke‐evacuator pencil cautery (SE), with...
This study was to determine occupational exposures formaldehyde and compare concentrations of obtained by active passive sampling methods. In one pathology histology laboratories, exposure measurements were collected with sets air samplers (Supelco LpDNPH tubes) badges (ChemDisk Aldehyde Monitor 571). Sixty-six sample pairs (49 personal 17 area) analyzed NIOSH NMAM 2016 for samples OSHA Method 1007 (using the manufacturer's updated uptake rate) samples. All 8-hr time-weighted average (TWA)...
Tier 1 occupational exposure assessment tools recommended for use under the Registration, Evaluation, Authorization, and restriction of CHemicals (REACH) were evaluated using newly collected measurement data. Evaluated included ECETOC TRAv2 TRAv3, MEASEv1.02.01, EMKG-EXPO-TOOL. Fifty-three situations (ESs) based on tasks/chemicals developed from National Institute Occupational Safety Health field surveys. During surveys, high quality contextual information required evaluating was also...
A laboratory study was performed to measure quartz in coal dust using high-flow rate samplers (CIP10-R, GK2.69 cyclone, and FSP10 cyclone) low-flow [10-mm nylon Higgins–Dewell type (BGI4L) cyclones] determine whether an increased mass collection from would affect the subsequent measurement by Fourier transform infrared (FTIR) X-ray diffraction (XRD) analytical procedures. Two different sizes of dusts, median aerodynamic diameter 4.48 μm (Coal Dust A) 2.33 B), were aerosolized a calm air...
Abstract Stoffenmanager®v4.5 and Advanced REACH Tool (ART) v1.5, two higher tier exposure assessment tools for use under REACH, were evaluated by determining accuracy robustness. A total of 282 measurements from 51 situations (ESs) collected categorized category. In this study, only the results liquids with vapor pressure (VP) > 10 Pa category having a sufficient number (n = 251 42 ESs) utilized. addition, presented handling/activity description input parameters same It should be...
This study introduces two semi-quantitative methods, Structured Subjective Assessment (SSA) and Control of Substances Hazardous to Health (COSHH) Essentials, in conjunction with two-dimensional Monte Carlo simulations for determining prior probabilities. Prior distribution using expert judgment was included comparison. Practical applications the proposed methods were demonstrated personal exposure measurements isoamyl acetate an electronics manufacturing facility isopropanol a printing shop....
The US Occupational Safety and Health Administration (OSHA) Mine do not regulate cleavage fragments of amphibole serpentine minerals as asbestos, even when particles meet the dimensional criteria for counting under standard phase-contrast microscopy methods. OSHA ID-160 method cautions that discriminatory is difficult should be attempted unless necessary no procedure provided differentiation. A published by American Society Testing Materials (ASTM International D7200-06) includes an attempt...
The Control of Substances Hazardous to Health (COSHH) Essentials model was evaluated using full-shift exposure measurements five chemical components in a mixture [acetone, ethylbenzene, methyl ethyl ketone, toluene, and xylenes] at medium-sized plant producing paint materials. Two tasks, batch-making bucket-washing, were examined. Varying levels control already established both tasks the average exposures individual chemicals considerably lower than regulatory advisory 8-h standards....
Thermal spray coating involves spraying a product (oftentimes metal) that is melted by extremely high temperatures and then applied under pressure onto surface. Large amounts of complex metal aerosol (e.g., Fe, Cr, Ni, Zn) are formed during the process, presenting potentially serious risk to operator. Information about health effects associated with exposure these aerosols lacking. Even less known chemical physical properties aerosols. The goal was develop test an automated thermal generator...
Phase distribution of airborne chemicals is important because intake and uptake mechanisms each phase are different. The concentrations needed to determine strategies exposure assessment, hazard control, worker protection. However, procedures for establishing concentration have not been standardized. objective this study was compare measurements an semivolatile pesticide (chlorpyrifos) by using two different procedures. Six applications in facilities were studied at site, samples collected...
The dry cleaning industry is moving away from using perchloroethylene. Occupational exposures to two alternative solvents, butylal and high-flashpoint hydrocarbons, have not been well characterized. We evaluated four shops that used these solvents. were staffed by Korean- Cantonese-speaking owners, Korean-, Cantonese-, Spanish-speaking employees. Because most workers had limited English proficiency we language services in our evaluations. In collected personal area air samples for butylal....
Manufacturing, processing, use, and disposal of nanoclay-enabled composites potentially lead to the release nanoclay particles from polymer matrix in which they are embedded; however, exposures airborne poorly understood.
Thermal spray coating is a process that applies molten metal product under pressure onto surface. Although thermal processes have been used for decades, exposure to aerosols formed during an emerging risk. Reports indicate high concentrations of composed toxic metals (e.g. chromium) are generated in the workplace. A knowledge gap exists related physicochemical properties as well any potential associated health effects. The objective this manuscript was review and previous studies examined...
Abstract In practice, workers often handle the same chemical(s) of interest under different control measures (e.g. local ventilation, enclosed system) during a full shift. Stoffenmanager® allows users to predict either task-based or full-shift exposures. However, most previous studies evaluated tool by comparing exposures with measured Also, limited evaluation Advanced REACH Tool (ART) Bayesian approach (ART+B) are available, requiring additional studies. The performance and ART without was...
A polyvinyl chloride (PVC) cassette insert with PVC filter (ACCU-CAP) in a 37-mm closed-face (CFC) was designed for gravimetric analysis. customized version of the ACCU-CAP, also to be used CFC, manufactured from an acid-digestible cellulose-acetate joined mixed cellulose ester (MCE) wet chemical The aim this study compare metal particle concentrations as sampled by (CI) CFC sampler traditional sampling method using only MCE CFC. Thirty-nine personal and 13 area samples were taken paired...
This second, and concluding, part of this study evaluated changes in sampling efficiency respirable size-selective samplers due to air pulsations generated by the selected personal pumps characterized Part I (Lee E, Lee L, Möhlmann C et al. Evaluation pump pulsation sampling: I. Pulsation measurements. Ann Occup Hyg 2013). Nine particle sizes monodisperse ammonium fluorescein (from 1 9 μm mass median aerodynamic diameter) were individually a vibrating orifice aerosol generator from dilute...
A study was conducted to evaluate a portable respiratory inductive plethysmograph (RIP) as means estimate minute ventilation (E) for use in controlling the flow rate of physiologic sampling pump (PSP). Specific aims were to: (1) ability RIP system measure E using direct (individual) fixed-volume calibration method (Direct model), (2) develop and performance indirect (group) regression models prediction output data from subject demographic characteristics (Indirect (3) compare estimates with...