A5061714052- Air Quality and Health Impacts
- Smoking Behavior and Cessation
- Indoor Air Quality and Microbial Exposure
- Noise Effects and Management
- Heavy Metal Exposure and Toxicity
- Air Quality Monitoring and Forecasting
- Climate Change and Health Impacts
- Environmental Justice and Health Disparities
- Heavy metals in environment
- Infection Control and Ventilation
- Atmospheric chemistry and aerosols
- Energy and Environment Impacts
- Arsenic contamination and mitigation
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Nutritional Studies and Diet
- Toxic Organic Pollutants Impact
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Allergic Rhinitis and Sensitization
- Gas Sensing Nanomaterials and Sensors
- Health, Environment, Cognitive Aging
- Oil Spill Detection and Mitigation
- Obesity, Physical Activity, Diet
- Aerosol Filtration and Electrostatic Precipitation
- Inhalation and Respiratory Drug Delivery
Johns Hopkins University
2016-2025
University of Maryland, Baltimore
2024
Instituto Politécnico Nacional
2022
Instituto Nacional de Enfermedades Respiratorias
2022
Weatherford College
2022
Universidad de Granada
2021
University of Baltimore
2020
American Academy of Pediatrics
2020
Bloomberg (United States)
2015-2019
Johns Hopkins Medicine
2019
We have increased organic field-effect transistor (OFET) NH3 response using tris(pentafluorophenyl)borane (TPFB) as a receptor. OFETs with this additive could detect concentrations of 450 ppb v/v, limit detection 350 ppb, the highest sensitivity reported to date for semiconductor films; in comparison, when triphenylmethane (TPM) or triphenylborane (TFB) was used an additive, no obvious improvement observed. These also showed considerable selectivity respect common vapors and stability toward...
Rationale: Indoor particulate matter is associated with worse chronic obstructive pulmonary disease (COPD) outcomes. It remains unknown whether reductions of indoor pollutants improve respiratory morbidity. Objectives: To determine placement active portable high-efficiency air cleaners can morbidity in former smokers. Methods: Eligible smokers moderate-to-severe COPD received or sham absolute and were followed for 6 months this blinded randomized controlled trial. The primary outcome was...
The surge in electronic cigarette (e-cig) use recent years has raised questions on chemical exposures that may result from vaping. Previous studies have focused measuring known toxicants, particularly those present traditional cigarettes, while fewer investigated unknown compounds and transformation products formed during the vaping process these diverse constantly evolving products. primary aim of this work was to apply liquid chromatography-high-resolution mass spectrometry (LC-HRMS)...
Importance Structural racism has been implicated in the disproportionally high asthma morbidity experienced by children living disadvantaged, urban neighborhoods. Current approaches designed to reduce triggers have modest impact. Objective To examine whether participation a housing mobility program that provided vouchers and assistance moving low-poverty neighborhoods was associated with reduced among explore potential mediating factors. Design, Setting, Participants Cohort study of 123 aged...
The use of nontherapeutic levels antibiotics in swine production can select for antibiotic resistance commensal and pathogenic bacteria swine. As a result, retail pork products, as well surface groundwaters contaminated with waste, have been shown to be sources human exposure antibiotic-resistant bacteria. However, it is unclear whether the air within operations also serves source bacterial pathogens. To investigate this issue, we sampled concentrated feeding operation an all-glass impinger....
Use of antimicrobials in industrial food-animal production is associated with the presence antimicrobial-resistant Staphylococcus aureus (S. aureus) among animals and humans. Hog slaughter/processing plants process large numbers from animal operations are environments conducive to exchange bacteria between workers.We compared prevalence multidrug-resistant S. (MDRSA) methicillin-resistant (MRSA) carriage processing plant workers, their household members, community residents.We conducted a...
Development of an air quality monitoring network with high spatio-temporal resolution requires installation a large number pollutant monitors. However, state-of-the-art monitors are costly and may not be compatible wireless data logging systems. In this study, low-cost electro-chemical sensors manufactured by Alphasense Ltd. for detection CO oxidative gases (predominantly O3 NO2) were evaluated. The voltages from three gas recorded every 2.5 sec when exposed to controlled concentrations in...
Ethylene oxide ("EtO") is an industrially made volatile organic compound and a known human carcinogen. There are few reliable reports of ambient EtO concentrations around production end-use facilities, however, despite major exposure concerns. We present
Using nationally representative data from the 2020-2021 Korea National Health and Nutrition Examination Survey, we examined associations between indoor air pollutant exposure potential obstructive sleep apnea (OSA) risk, estimated by STOP-BANG questionnaire scores. We included 1,501 participants who completed consented to in-home quality measurements per Korea's Indoor Air Quality (IAQ) standards. Data were weighted for national representativeness, multivariate logistic regression models...
Abstract Naphthalenetetracarboxylic diimide derivatives (octyl “8” NTCDI, dimethylaminopropyl “DMP” NTCDI) and copper phthalocyanine (CuPc) are used to form a diverse organic field‐effect transistor (OFET) sensor array. CuPc 8‐NTCDI p‐channel n‐channel semiconductors, respectively, showing expected opposing responses analytes. DMP‐NTCDI, on the other hand, because of its ionizable side chain, shows response directions magnitudes that not correlated those two. The result is distinct pattern...
E-cigarette (vaping) conventions are public events promoting electronic cigarettes, in which indoor use of e-cigarettes is allowed. The large concentration people using and poor air ventilation can result pollution. In order to estimate this worst-case exposure e-cigarettes, we evaluated quality a vaping convention Maryland (MD), USA. Real-time concentrations particulate matter (PM10) real-time total volatile organic compounds (TVOCs), CO2 NO2 were measured. Integrated samples nicotine PM10...
<h3>Background</h3> Despite the increasing popularity of hookah bars, there is a lack research assessing health effects smoke among employees. This study investigated indoor air quality in bars and secondhand on bar workers. <h3>Methods</h3> Air samples were collected during work shift 10 workers New York City (NYC). measurements fine particulate matter (PM<sub>2.5</sub>), black carbon (BC<sub>2.5</sub>), monoxide (CO), nicotine each shift. Blood pressure heart rate, markers active smoking...
Nearly three billion people use solid fuels for cooking and heating, which leads to extremely high levels of household air pollution is a major cause morbidity mortality. Many stove manufacturers have developed alternative cookstoves (ACSs) that are aimed at reducing emissions fuel consumption. Here, we tested traditional clay chulha cookstove (TCS) five commercially available ACSs, including both natural draft (Greenway Smart Stove, Envirofit PCS-1) forced stoves (BioLite HomeStove, Philips...