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https://www.readbyqxmd.com/read/29241079/prenatal-and-childhood-perfluoroalkyl-substances-exposures-and-children-s-reading-skills-at-ages-5-and-8years
#1
Hongmei Zhang, Kimberly Yolton, Glenys M Webster, Xiaoyun Ye, Antonia M Calafat, Kim N Dietrich, Yingying Xu, Changchun Xie, Joseph M Braun, Bruce P Lanphear, Aimin Chen
BACKGROUND: Exposure to perfluoroalkyl substances (PFASs) may impact children's neurodevelopment. OBJECTIVE: To examine the association of prenatal and early childhood serum PFAS concentrations with children's reading skills at ages 5 and 8years. METHODS: We used data from 167 mother-child pairs recruited during pregnancy (2003-2006) in Cincinnati, OH, quantified prenatal serum PFAS concentrations at 16±3weeks of gestation and childhood sera at ages 3 and 8years...
December 11, 2017: Environment International
https://www.readbyqxmd.com/read/29223808/perfluoroalkyl-acid-levels-in-first-time-mothers-in-relation-to-offspring-weight-gain-and-growth
#2
Irina Gyllenhammar, Barbro Diderholm, Jan Gustafsson, Urs Berger, Peter Ridefelt, Jonathan P Benskin, Sanna Lignell, Erik Lampa, Anders Glynn
We investigated if maternal body burdens of perfluoroalkyl acids (PFAAs) at the time of delivery are associated with birth outcome and if early life exposure (in utero/nursing) is associated with early childhood growth and weight gain. Maternal PFAA body burdens were estimated by analysis of serum samples from mothers living in Uppsala County, Sweden (POPUP), sampled three weeks after delivery between 1996 and 2011. Data on child length and weight were collected from medical records and converted into standard deviation scores (SDS)...
December 7, 2017: Environment International
https://www.readbyqxmd.com/read/29199597/hepatocellular-carcinoma-and-possible-chemical-and-biological-causes-a-review
#3
Pinar Erkekoglu, Didem Oral, Ming-Wei Chao, Belmar Kocer-Gumusel
The development of hepatocellular carcinoma (HCC) is a multistep process. In HCC, progressive and morphologically distinct preneoplastic lesions/alterations associated with chronic liver injury, inflammation, hepatocellular degeneration/regeneration, necrosis, and small-cell dysplasia can be observed. The incidence of HCC exhibits regional and ethnic differences. Several cytotoxic and DNA-damaging chemicals are suggested to be the underlying causes of HCC-for example, acrylamide, perfluorooctanoic acid (PFOA), polychlorinated biphenyls (PCBs), benzo(a)pyrene (BaP), perfluorinated chemicals (PFCs), vinyl chloride monomer (VCM), and dietary contaminants (aflatoxins, ochratoxins)...
2017: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/29198028/adverse-bioeffect-of-perfluorooctanoic-acid-on-liver-metabolic-function-in-mice
#4
Xinmou Wu, Guojie Xie, Xiaoxiao Xu, Wei Wu, Bin Yang
Perfluorooctanoic acid (PFOA), a kind of manufactured material, is widely accumulated around environmental system and into wildlife, including human beings. Toxicologically, PFOA induces hepatomegaly (liver enlargement) in the dose- and time-dependent manners. However, biological mechanism of hepatotoxicity warrants to be further investigated. In the present study, mature male mice were exposed to dosed PFOA for 21 days before conducting biochemical tests and immunoassays. As results, decreased fast blood glucose and elevated insulin contents were observed in PFOA-dosed mice...
December 2, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29197229/photocatalytic-degradation-and-mineralization-of-perfluorooctanoic-acid-pfoa-using-a-composite-tio2-rgo-catalyst
#5
Beatriz Gomez-Ruiz, Paula Ribao, Nazely Diban, Maria J Rivero, Inmaculada Ortiz, Ane Urtiaga
The inherent resistance of perfluoroalkyl substances (PFASs) to biological degradation makes necessary to develop advanced technologies for the abatement of this group of hazardous substances. The present work investigated the photocatalytic decomposition of perfluorooctanoic acid (PFOA) using a composite catalyst based on TiO2 and reduced graphene oxide (95% TiO2/5% rGO) that was synthesized using a facile hydrothermal method. The efficient photoactivity of the TiO2-rGO (0.1gL-1) composite was confirmed for PFOA (0...
November 28, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29191320/distribution-characteristics-of-poly-and-perfluoroalkyl-substances-in-the-yangtze-river-delta
#6
Binghui Zheng, Xiaolei Liu, Rui Guo, Qing Fu, Xingru Zhao, Shanjun Wang, Sheng Chang, Xing Wang, Mengjiao Geng, Guang Yang
In this work, a method was developed and optimized for the analysis of polyfluoroalkyl and/or perfluoroalkyl substances (PFASs) content in surface water and sediment samples with high instrumental response and good separation. Surface water and sediment samples were collected from the Yangtze River Delta (YRD) to analyze the distribution characteristics of perfluoroalkyl carboxylic acids (PFCAs), perfluoroalkane sulfonic acids (PFSAs), perfluoroalkyl phosphonic acids (PFPAs), perfluoroalkyl phosphinic acids (PFPiAs), and polyfluoroalkyl phosphoric acid diesters (diPAPs)...
November 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29191318/contribution-of-precursor-compounds-to-the-release-of-per-and-polyfluoroalkyl-substances-pfass-from-waste-water-treatment-plants-wwtps
#7
Ulrika Eriksson, Peter Haglund, Anna Kärrman
Per- and polyfluoroalkyl substances (PFASs) are ubiquitous in sludge and water from waste water treatment plants, as a result of their incorporation in everyday products and industrial processes. In this study, we measured several classes of persistent PFASs, precursors, transformation intermediates, and newly identified PFASs in influent and effluent sewage water and sludge from three municipal waste water treatment plants in Sweden, sampled in 2015. For sludge, samples from 2012 and 2014 were analyzed as well...
November 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29191316/tissue-distribution-of-perfluoroalkyl-acids-and-health-status-in-wild-mozambique-tilapia-oreochromis-mossambicus-from-loskop-dam-mpumalanga-south-africa
#8
Jacqueline T Bangma, Jessica L Reiner, Hannes Botha, Theresa M Cantu, Marco A Gouws, Matthew P Guillette, Jeremy P Koelmel, Wilmien J Luus-Powell, Jan Myburgh, Olivia Rynders, Joseph R Sara, Willem J Smit, John A Bowden
This study examined concentrations of 15 perfluoroalkyl acids (PFAAs) in tissues from male Mozambique tilapia (Oreochromis mossambicus) collected at Loskop Dam, Mpumalanga, South Africa in 2014 and 2016. Nine of the 15 PFAAs were detected frequently and were included in statistical analysis and included two of the most commonly known PFAAs, perfluorooctanesulfonic acid (PFOS) (median, 41.6ng/g) and perfluorooctanoic acid (PFOA) (median, 0.0825ng/g). Of the tissues measured, plasma (2016 and 2014 median, 22...
November 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29175300/perfluorooctanoic-acid-and-low-birth-weight-estimates-of-us-attributable-burden-and-economic-costs-from-2003-through-2014
#9
Julia Malits, Jan Blustein, Leonardo Trasande, Teresa M Attina
BACKGROUND AND OBJECTIVE: In utero exposure to perfluorooctanoic acid (PFOA) has been associated with decreases in birth weight. We aimed to estimate the proportion of PFOA-attributable low birth weight (LBW) births and associated costs in the US from 2003 to 2014, a period during which there were industry-initiated and regulatory activities aimed at reducing exposure. METHODS: Serum PFOA levels among women 18-49 years were obtained from the National Health and Nutrition Examination Survey (NHANES) for 2003-2014; birth weight distributions were obtained from the Vital Statistics Natality Birth Data...
November 22, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29169101/contribution-of-diet-and-other-factors-to-the-observed-levels-of-selected-perfluoroalkyl-acids-in-serum-among-us-children-aged-3-11-years
#10
Ram B Jain
Data from National Health and Nutrition Examination Survey for 2013-2014 for children aged 3-11 years (N = 639) were analyzed to evaluate the contribution of diet and other factors in variability associated with the observed levels of seven perfluoroalkyl acids in serum, namely, 2(N-methyl-perfluorooctane sulfonamide) acetic acid (MPAH), perfluorodecanoic acid (PFDE), perfluorononanoic acid (PFNA), perflurorohexane sulfonic acid (PFHxS), linear isomer of PFOA (NPFOA), linear isomer of PFOS (NPFOS), and monomethyl isomer of PFOS (MPFOS)...
November 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/29169098/assessing-the-effects-of-seawater-temperature-and-ph-on-the-bioaccumulation-of-emerging-chemical-contaminants-in-marine-bivalves
#11
Ana Luísa Maulvault, Carolina Camacho, Vera Barbosa, Ricardo Alves, Patrícia Anacleto, Fabiola Fogaça, Christiaan Kwadijk, Michiel Kotterman, Sara C Cunha, José O Fernandes, Rie R Rasmussen, Jens J Sloth, Òscar Aznar-Alemany, Ethel Eljarrat, Damià Barceló, António Marques
Emerging chemical contaminants [e.g. toxic metals speciation, flame retardants (FRs) and perfluorinated compounds (PFCs), among others], that have not been historically recognized as pollutants nor their toxicological hazards, are increasingly more present in the marine environment. Furthermore, the effects of environmental conditions (e.g. temperature and pH) on bioaccumulation and elimination mechanisms of these emerging contaminants in marine biota have been poorly studied until now. In this context, the aim of this study was to assess, for the first time, the effect of warmer seawater temperatures (Δ = + 4°C) and lower pH levels (Δ = - 0...
November 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/29156323/early-life-exposure-to-per-and-polyfluoroalkyl-substances-and-mid-childhood-lipid-and-alanine-aminotransferase-levels
#12
Ana M Mora, Abby F Fleisch, Sheryl L Rifas-Shiman, Jennifer A Woo Baidal, Larissa Pardo, Thomas F Webster, Antonia M Calafat, Xiaoyun Ye, Emily Oken, Sharon K Sagiv
BACKGROUND: Growing evidence suggests that exposure to per- and polyfluoroalkyl substances (PFASs) may disrupt lipid homeostasis and liver function, but data in children are limited. OBJECTIVE: We examined the association of prenatal and mid-childhood PFAS exposure with lipids and alanine aminotransferase (ALT) levels in children. METHODS: We studied 682 mother-child pairs from a Boston-area pre-birth cohort. We quantified PFASs in maternal plasma collected in pregnancy (median 9...
November 17, 2017: Environment International
https://www.readbyqxmd.com/read/29154207/particle-size-distribution-and-respiratory-deposition-estimates-of-airborne-perfluoroalkyl-acids-during-the-haze-period-in-the-megacity-of-shanghai
#13
Mengjie Guo, Yan Lyu, Tingting Xu, Bo Yao, Weihua Song, Mei Li, Xin Yang, Tiantao Cheng, Xiang Li
This study presents the particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids (PFAAs) during the haze period. Size-segregated haze aerosols were collected from an urban location in Shanghai using an eight-stage air sampler. The samples were analyzed for eight PFAAs using ultra-high-performance liquid chromatography tandem triple quadrupole mass spectrometry. The quantification results showed that the concentrations of particle-bound Σ 8PFAAs ranged from 0.26 to 1...
November 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29154139/perfluorinated-compounds-in-surface-waters-of-shanghai-china-source-analysis-and-risk-assessment
#14
Rui Sun, Minghong Wu, Liang Tang, Jiajun Li, Zhaoqiu Qian, Tao Han, Gang Xu
17 perfluorinated compounds (PFCs) were systematically investigated in the surface water from principal watersheds of Shanghai, China. 10 PFCs were above the detection limit (0.08-0.28ng/L) in 39 surface water samples. The perfluorooctanoic acid (PFOA) and perfluorobutanesulfonate (PFBS) were the two dominant compounds with a median concentration 50.67ng/L and 29.84ng/L, respectively. Concentrations of perfluorooctanesulfonate (PFOS) were generally less than PFBS, which might result from the global phase-out of PFOS production and the use of PFBS as a substitute for PFOS-based products...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29150771/occurrence-and-partition-of-perfluorinated-compounds-pfcs-in-water-and-sediment-from-the-songhua-river-china
#15
Weihua Dong, Baolin Liu, Yang Song, Hong Zhang, Juying Li, Xiaoyu Cui
This study provided the first evidence that perfluorinated compounds (PFCs) were widely detected in the Songhua River, China. Seventeen surface water and sediment samples were collected and analyzed for the determination of 14 PFCs. The total concentrations of PFCs (Σ PFCs) ranged from 0.143 to 1.41 ng L(-1) in water samples. Perfluorooctanoic acid (PFOA) was detected with the highest detection frequency (%) ranging from below LOQ to 0.678 ng L(-1). Σ PFCs were relatively low in sediments, and only four individual homologues were detected...
November 17, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29139573/gait-patterns-symptoms-and-function-in-patients-with-isolated-tibiofemoral-osteoarthritis-and-combined-tibiofemoral-and-patellofemoral-osteoarthritis
#16
Harvi F Hart, Kay M Crossley, Michael A Hunt
The purpose of this study was to compare hip and knee biomechanics during walking in individuals with isolated TFOA, combined TFOA and PFOA, and those without knee OA, and to compare patient-reported symptoms and function in individuals with isolated TFOA and those with combined TFOA and PFOA. Participants with and without knee OA were assessed and categorized into (i) no OA, (ii) isolated TFOA, and (iii) combined TFOA and PFOA, based on Kellgren and Lawrence diagnostic criteria. Quantitative motion analyses were conducted during walking, and hip and knee kinematics and external moments were calculated...
November 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29136802/carboxylated-carbon-nanospheres-as-solid-phase-extraction-adsorbents-for-the-determination-of-perfluorinated-compounds-in-water-samples-by-liquid-chromatography-tandem-mass-spectrometry
#17
Xia Wang, Ying Zhang, Fu-Wei Li, Ru-Song Zhao
This work demonstrates the extraction potential of carboxylated carbon nanospheres (CNSs-COOH) for solid-phase extraction of perfluoroalkyl acids (PFAAs) for the first time. Six PFAAs, including perfluorohexanesulfonate (PFHxS), perfluoroheptanoic acid (PFHpA), perfluorooctanoic acid (PFOA), perfluorooctanoic sulfonic (PFOS), perfluorononanoic acid (PFNA) and perfluorodecanoic acid (PFDA), were quantitatively adsorbed on a CNSs-COOH-packed cartridge; then, the PFAAs retained on the adsorbent were quantitatively eluted with an optimized volume of acetone (pH = 10)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29135438/exposure-to-perfluoroalkyl-substances-and-metabolic-outcomes-in-pregnant-women-evidence-from-the-spanish-inma-birth-cohorts
#18
Nuria Matilla-Santander, Damaskini Valvi, Maria-Jose Lopez-Espinosa, Cyntia B Manzano-Salgado, Ferran Ballester, Jesús Ibarluzea, Loreto Santa-Marina, Thomas Schettgen, Mònica Guxens, Jordi Sunyer, Martine Vrijheid
BACKGROUND: Exposure to perfluoroalkyl substances (PFASs) may increase risk for metabolic diseases; however, epidemiologic evidence is lacking at the present time. Pregnancy is a period of enhanced tissue plasticity for the fetus and the mother and may be a critical window of PFAS exposure susceptibility. OBJECTIVE: We evaluated the associations between PFAS exposures and metabolic outcomes in pregnant women. METHODS: We analyzed 1,240 pregnant women from the Spanish INMA [Environment and Childhood Project (INfancia y Medio Ambiente)] birth cohort study (recruitment period: 2003-2008) with measured first pregnancy trimester plasma concentrations of four PFASs (in nanograms/milliliter)...
November 13, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29133598/half-lives-of-pfos-pfhxs-and-pfoa-after-end-of-exposure-to-contaminated-drinking-water
#19
Ying Li, Tony Fletcher, Daniel Mucs, Kristin Scott, Christian H Lindh, Pia Tallving, Kristina Jakobsson
BACKGROUND: Municipal drinking water contaminated with perfluorinated alkyl acids had been distributed to one-third of households in Ronneby, Sweden. The source was firefighting foam used in a nearby airfield since the mid-1980s. Clean water was provided from 16 December 2013. OBJECTIVE: To determine the rates of decline in serum perfluorohexane sulfonate (PFHxS), perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA), and their corresponding half-lives...
November 13, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29132022/determination-of-perfluoroalkyl-acid-isomers-in-biosolids-biosolids-amended-soils-and-plants-using-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry
#20
Hongna Zhang, Bei Wen, Wen Wen, Yibing Ma, Xiaoyu Hu, Yali Wu, Lei Luo, Shuzhen Zhang
Isomer-specific analysis of perfluoroalkyl acids (PFAAs) is important to accurately assess their environmental source, fate, and human risks. In this study, a method was developed for the determination of perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), and perfluorohexane sulfonate (PFHxS) isomers in biosolids, biosolids-amended soils and plants using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). The separation efficiencies of two chromatographic columns and extraction capacities of different methods were tested...
November 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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