A5058261479- Per- and polyfluoroalkyl substances research
- Toxic Organic Pollutants Impact
- Forensic Toxicology and Drug Analysis
- Opioid Use Disorder Treatment
- Air Quality and Health Impacts
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Atmospheric chemistry and aerosols
- Particle Accelerators and Free-Electron Lasers
- Cannabis and Cannabinoid Research
- Metabolomics and Mass Spectrometry Studies
- Biosensors and Analytical Detection
- Neurotransmitter Receptor Influence on Behavior
- Effects and risks of endocrine disrupting chemicals
- Additive Manufacturing and 3D Printing Technologies
- Molecular Biology Techniques and Applications
- Advanced Chemical Sensor Technologies
- Environmental Justice and Health Disparities
- 3D Printing in Biomedical Research
- Groundwater and Isotope Geochemistry
- Fiber-reinforced polymer composites
- Analytical Methods in Pharmaceuticals
- Advanced biosensing and bioanalysis techniques
- Innovative Microfluidic and Catalytic Techniques Innovation
- HIV, Drug Use, Sexual Risk
Environmental Protection Agency
2025
Oak Ridge Associated Universities
2025
University of Notre Dame
2021-2024
University of Tulsa
2017-2019
Thomas Jefferson National Accelerator Facility
1991-2002
Continuous Electron Beam Accelerator Facility
2002
Per- and polyfluoroalkyl substances (PFAS), a highly persistent potentially toxic class of chemicals, are added to cosmetics increase their durability water resistance. To assess this potential health environmental risk, 231 cosmetic products purchased in the U.S. Canada were screened for total fluorine using particle-induced gamma-ray emission spectroscopy. Of eight categories tested, foundations, mascaras, lip had highest proportion with high ≥0.384 μg F/cm2. Twenty-nine including 20...
A suite of analytical techniques was used to obtain a comprehensive picture per- and polyfluoroalkyl substances (PFAS) in selected Canadian food packaging for fast foods (n = 42). Particle-induced gamma ray emission spectroscopy revealed that 55% the samples contained <3580, 19% 3580–10 800, 26% > 10 800 μg F/m2. The highest total F (1 010 000–1 300 000 F/m2) measured molded "compostable" bowls. Targeted analysis 8 with high 4–15 individual PFAS each sample, 6:2 fluorotelomer methacrylate...
Following the expiration of patents on fused-filament-fabrication (FFF), availability and uses this 3D-printing technology have exploded. Several recent reports describe how conductive composites can be used with FFF printers to generate 3D-printed electrodes (3DEs) for energy storage electrochemical analysis. As printed materials, these very high impedance values because content insulating thermoplastic required printers. To overcome challenge, deposition metals or activation harsh...
We analyzed 72 children's textile products marketed as stain-resistant from US and Canadian stores, particularly school uniforms, to assess if clothing represents a significant route of exposure per- polyfluoroalkyl substances (PFAS). Products were first screened for total fluorine (total F) using particle-induced γ-ray emission (PIGE) spectroscopy (n = 72), followed by targeted analysis 49 neutral ionic PFAS 57). detected in all both markets, with the most abundant compound being 6:2...
Numerous per- and polyfluoroalkyl substances (PFASs) occur in consumer food packaging due to intentional unintentional addition, despite increasing concern about their health environmental hazards. We present a substance flow analysis framework assess the flows of PFASs contained plant fiber-based plastic waste stream environment. Each year between 2018 2020, an estimated 9000 (range 1100-25 000) 940 120-2600) tonnes per polymeric were used 2% U.S. Canada, respectively. At least 11...
Direct fluorination of plastics is performed to impart chemical resistance via exposure polyethylene fluorine gas produce a fluorine-modified surface layer. Leaching experiments were on directly fluorinated container under various conditions and with different matrices, including foodstuffs. The average sum per- polyfluoroalkyl substances (PFAS) concentrations measured from extraction was 63.75 ± 13.2 ng/g plastic. Seven-day leaching containers water, methanol, acetone produced sums PFAS...
The opioid epidemic continues to be associated with high numbers of fatalities in the USA and other countries, driven mainly by inclusion potent synthetic opioids street drugs. Drug checking means various technologies is being increasingly implemented as a harm reduction strategy inform users about constituent drugs their samples. We assessed how valued drug services (DCS) would for given ubiquity fentanyl related analogs supply, information they most value from checking, compared expected...
Purpose If NHS hospitals wish to influence patients choose them and, as the literature review suggests, cleanliness will be a key‐influencing factor in making that choice, it would seem important for understand what factors lead people decide whether hospital is clean or dirty. The research aims identify key are patients' perceptions of and rank these order importance. Design/methodology/approach project utilised mixed methodology collect data. staff who had been recent took part focus...
Per- and polyfluoroalkyl substances (PFAS) distribute bioaccumulate within aquatic organisms food webs. Many PFAS are proteinophilic compounds that display higher concentrations in the blood, liver, kidney of vertebrates than muscle. Several studies have shown birds mammals exhibit maternal offloading to offspring through transport placenta, milk, egg deposition, but no study date has observed fish. We analyzed muscle tissue eggs with targeted LC-MS/MS for sexually mature Lake Michigan...
Ultraviolet–visible (UV–vis) spectroscopy represents one of the most popular analytical techniques in chemical research labs. A variety vendors provide instruments that are suited for analysis liquid samples at moderate concentrations. However, to accommodate more specialized experiments, expensive accessories required and often do not fit specific needs experimental scientists. In this work, we present a generalized adapter can be 3D printed used with existing spectrometers enable wide...
A new method for rapidly screening drinking water the presence of per- and polyfluoroalkyl substances (PFAS) has been developed. This involves gravity filtering through an activated carbon felt subsequently analyzing surface with particle induced gamma-ray emission (PIGE) spectroscopy. Using this technique, total fluorine measurements by PIGE produced linear calibration curves adequate to measure below 50 ppt from PFAS in as little 2 L sample. Inorganic fluoride were successfully...
ADVERTISEMENT RETURN TO ISSUEPREVCorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Fluorinated Compounds in North American Cosmetics"Heather D. WhiteheadHeather WhiteheadMore by Heather Whitehead, Marta VenierMarta VenierMore Venierhttps://orcid.org/0000-0002-2089-8992, Yan WuYan WuMore Wuhttps://orcid.org/0000-0001-7876-261X, Emi EastmanEmi EastmanMore Eastman, Shannon UrbanikShannon UrbanikMore Urbanik, Miriam L. DiamondMiriam DiamondMore...
Many "smart" and "fitness" watch bands are advertised to contain fluoroelastomers, a type of synthetic rubber designed be resilient against skin oils sweat. Fluoroelastomers, which considered polymeric form per- polyfluoroalkyl substances (PFAS), have historically involved the use shorter-chain PFAS as surfactants in polymerization process. In this study, 22 were analyzed across numerous brands price points for presence PFAS. Products first screened total fluorine using particle-induced...
In February 2023, a train derailment in Ohio caused chemical spill and fires releasing contaminants into the air, soil, waterways, buildings.
The use of nucleic acid tests (NAT) for sensitive and rapid detection pathogens relevant to human health has increased due the ubiquity amplification techniques such as polymerase chain reaction. tools amplified (NA) in field clinical settings is limited by need complex instrumentation trained users. To address these limitations we developed a rapid, robust, instrument-free colorimetric method acids using visible region dye, Nile Blue (NB). NB cationic benzophenoxazine dye with well-known...
Abstract Background: The opioid epidemic continues to cause high numbers of fatalities in the US and other countries, driven mainly by inclusion potent synthetic opioids street drugs. Drug checking means various technologies is being increasingly implemented as a harm reduction strategy inform users about constituent drugs their samples. We assessed how valued drug services (DCS) would be for given ubiquity fentanyl related analogs supply, information they most value from checking, compared...
In order to support the planned CEBAF upgrade at Jefferson Lab a new cryomodule has been designed. A key component of is upgraded RF input waveguide, which may couple as much 10 kW power superconducting radio frequency (SRF) cavities contained in bath superfluid helium. The coupler consists straight copper plated stainless steel waveguide thermal transition between 2 K and 300 one ceramic window warm end waveguide. interior shares common vacuum with cavity. Initial testing conducted...