A5042977492- Toxic Organic Pollutants Impact
- Per- and polyfluoroalkyl substances research
- Air Quality and Health Impacts
- Flame retardant materials and properties
- Effects and risks of endocrine disrupting chemicals
- Carcinogens and Genotoxicity Assessment
- Fire dynamics and safety research
- Atmospheric chemistry and aerosols
- South Asian Studies and Conflicts
- Pesticide Exposure and Toxicity
- Chemistry and Chemical Engineering
- Indian History and Philosophy
- Environmental and Industrial Safety
- Microplastics and Plastic Pollution
- Environmental Justice and Health Disparities
- Structural Engineering and Materials Analysis
- South Asian Studies and Diaspora
- Psychiatric care and mental health services
- Thermal Radiation and Cooling Technologies
- Sports, Gender, and Society
- Synthesis of Organic Compounds
- Artificial Intelligence in Games
- Radiology practices and education
- Recycling and Waste Management Techniques
- Vietnamese History and Culture Studies
Public Policy Institute of California
2016-2025
Imagerie Adaptative Diagnostique et Interventionnelle
2024
Inserm
2024
University of California, Berkeley
2012-2023
Olympus (United States)
2011
Battelle
2009
University of California, Davis
2009
San Francisco Estuary Institute
2009
University of Michigan
2009
Duke University
2009
Drinking water contamination with poly- and perfluoroalkyl substances (PFASs) poses risks to the developmental, immune, metabolic, endocrine health of consumers. We present a spatial analysis 2013–2015 national drinking PFAS concentrations from U.S. Environmental Protection Agency's (US EPA) third Unregulated Contaminant Monitoring Rule (UCMR3) program. The number industrial sites that manufacture or use these compounds, military fire training areas, wastewater treatment plants are all...
Restrictions on the use of polybrominated diphenyl ethers (PBDEs) have resulted in increased alternate flame retardant chemicals to meet flammability standards. However, it has been difficult determine which chemical formulations are currently being used high volumes standards since consumer products is not transparent (i.e., provided customers). To investigate as replacements for PentaBDE polyurethane foam, we analyzed foam samples from 26 different pieces furniture purchased United States...
As the use of polybrominated diphenyl ethers (PBDEs), and entire class organohalogen flame retardants, is declining, organophosphate esters retardants (OPFRs) increasing. In this paper, we ask whether OPFRs are a better choice than PBDEs. To address question, compared with PBDEs for wide range properties. exposure ubiquitous in people outdoor indoor environments, now often found at higher levels to PBDE peak levels. Furthermore, data from toxicity testing, epidemiological studies, risk...
Per- and polyfluoroalkyl substances (PFASs) are highly persistent synthetic chemicals, some of which have been associated with cancer, developmental toxicity, immunotoxicity, other health effects. PFASs in grease-resistant food packaging can leach into increase dietary exposure. We collected ∼400 samples contact papers, paperboard containers, beverage containers from fast restaurants throughout the United States measured total fluorine using particle-induced γ-ray emission (PIGE)...
With the phase-out of PentaBDE in 2004, alternative flame retardants are being used polyurethane foam to meet flammability standards. However, insufficient information is available on identity currently use. Baby products containing must California state furniture standards, which likely affects use baby throughout U.S. it unclear contain and at what concentrations. In this study we surveyed investigate how often were these products. Information when purchased whether they contained a label...
California's furniture flammability standard Technical Bulletin 117 (TB 117) is believed to be a major driver of chemical flame retardant (FR) use in residential the United States. With phase-out polybrominated diphenyl ether (PBDE) FR mixture PentaBDE 2005, alternative FRs are increasingly being used meet TB 117; however, it was unclear which chemicals were and how frequently. To address this data gap, we collected analyzed 102 samples polyurethane foam from couches purchased States 1985...
This commentary presents a scientific basis for managing as one chemical class the thousands of chemicals known PFAS (per- and polyfluoroalkyl substances). The includes perfluoroalkyl acids, perfluoroalkylether their precursors; fluoropolymers perfluoropolyethers; other PFAS. approach is presented in relation to physicochemical, environmental, toxicological properties. Specifically, high persistence, accumulation potential, and/or hazards (known potential) studied date warrant treating all...
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...
The Florence Statement on Triclosan and Triclocarban documents a consensus of more than 200 scientists medical professionals the hazards lack demonstrated benefit from common uses triclosan triclocarban. These chemicals may be used in thousands personal care consumer products as well building materials. Based extensive peer-reviewed research, this statement concludes that triclocarban are environmentally persistent endocrine disruptors bioaccumulate toxic to aquatic other organisms. Evidence...
Sources of exposure to per- and polyfluorinated alkyl substances (PFAS) include food, water, given that humans spend typically 90% our time indoors, air dust. Quantifying PFAS prevalent such as neutral, volatile PFAS, estimating their risk is thus important. To accurately measure these compounds polyethylene (PE) sheets were employed validated passive detection tools, analyzed by gas chromatography-mass spectrometry. Air concentrations compared dust carpet reported elsewhere. Partitioning...
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...
A flame retardant used in children's sleepwear, tris-(1,3-dichloro-2-propyl)phosphate (Fyrol FR2) is a mutagen the Salmonella -mammalian tissue homogenate test after it has been activated by mouse or rat liver homogenate. The expected enzymatic hydrolysis product, 1,3-dichloro-2-propanol, similarly activation proposed metabolite of retardant, 1,3-dichloro-2-propanone, potent absence such activation. with similar structure, tris-(2,3-dibromopropyl)phosphate (tris-BP), was shown previously to...
The flame retardant, tris(2,3-dibromopropyl)phosphate (tris-BP), which is a mutagen and causes cancer sterility in animals absorbed from fabric by people. 2,3-Dibromopropanol, metabolite of tris-BP itself, has been found the urine samples ten children who were wearing or had worn tris-BP-treated sleepwear. Eight these well-washed sleepwear possibility absorption discussed. 2,3-Dibromopropanol was not urines one child adult never garments.
Background: To date, the toxicity of organophosphate esters has primarily been studied regarding their use as pesticides and effects on neurotransmitter acetylcholinesterase (AChE). Currently, flame retardants plasticizers are two largest market segments for they found in a wide variety products, including electronics, building materials, vehicles, furniture, car seats, plastics, textiles. As result, metabolites routinely human urine, blood, placental tissue, breast milk across globe. It...
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...
Flame retardants (FRs) are added to vehicles meet flammability standards, such as US Federal Motor Vehicle Safety Standard FMVSS 302. However, an understanding of which FRs being used, sources in the vehicle, and implications for human exposure is lacking. participants (n = 101) owning a vehicle model year 2015 or newer hung silicone passive sampler on their rearview mirror 7 days. Fifty-one 101 collected foam sample from seat. Organophosphate esters (OPEs) were most frequently detected FR...