keyword
MENU ▼
Read by QxMD icon Read
search

Pfos

keyword
https://www.readbyqxmd.com/read/28732399/analysis-of-emerging-organic-contaminants-in-water-fish-and-suspended-particulate-matter-spm-in-the-joint-danube-survey-using-solid-phase-extraction-followed-by-uhplc-ms-ms-and-gc-ms-analysis
#1
Robert Loos, Simona Tavazzi, Giulio Mariani, Gert Suurkuusk, Bruno Paracchini, Gunther Umlauf
In the third Joint Danube Survey (JDS3), emerging organic contaminants were analysed in the dissolved water phase of samples from the Danube River and its major tributaries. Analyses were performed using solid-phase extraction (SPE) followed by ultra-high-pressure liquid chromatography triple-quadrupole mass spectrometry (UHPLC-MS-MS) and gas chromatography-mass spectrometry (GC-MS). The polar organic compounds analysed by UHPLC-MS-MS were 1H-benzotriazole, methylbenzotriazoles, carbamazepine, 10,11-dihydro-10,11-dihydroxy-carbamazepine, diclofenac, sulfamethox-azole, 2,4-D (2,4-dichlorophenoxyacetic acid), MCPA (2-methyl-4-chlorophenoxyacetic acid), metolachlor, cybutryne (irgarol), terbutryn, DEET (N,N-diethyl-m-toluamide), and several perfluoroalkyl acids (C6-C9; C8=perfluorooctanoic acid (PFOA)) and perfluorooctansulfonic acid (PFOS)...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28724225/seasonal-variations-in-the-occurrence-of-perfluoroalkyl-substances-in-water-sediment-and-fish-samples-from-ebro-delta-catalonia-spain
#2
Emanuela Pignotti, Gemma Casas, Marta Llorca, Anil Tellbüscher, David Almeida, Enrico Dinelli, Marinella Farré, Damià Barceló
The main objective of this study was to assess the concentration levels and the seasonal variations of 13 poly- and perfluoroalkyl substances (PFASs) in different compartments (water, sediments and fish) of the Ebro Delta (NE Spain) and surrounding coastal areas. Perfluorooctanoic acid (PFOA) was the most frequently detected compound in waters and sediments. Perfluorocarboxylic acids (PFCAs) were the compounds found at the highest concentrations in water samples. On the other hand, sediments were more enriched in perfluorooctanesulfonate (PFOS) (range<1...
July 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28721589/recent-developments-in-polyfluoroalkyl-compounds-research-a-focus-on-human-environmental-health-impact-suggested-substitutes-and-removal-strategies
#3
John Baptist Nzukizi Mudumbi, Seteno Karabo Obed Ntwampe, Tandi Matsha, Lukhanyo Mekuto, Elie Fereche Itoba-Tombo
Between the late 1940s and early 1950s, humans manufactured polyfluoroalkyl compounds (PFCs) using electrochemical fluorination and telomerisation technologies, whereby hydrogen atoms are substituted by fluorine atoms, thus conferring unnatural and unique physicochemical properties to these compounds. Presently, there are wide ranges of PFCs, and owing to their bioaccumulative properties, they have been detected in various environmental matrices and in human sera. It has thus been suggested that they are hazardous...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28712295/closing-the-mass-balance-on-fluorine-on-papers-and-textiles
#4
Alix Elizabeth Robel, Kristin Amy Marshall, Margaret Dickinson, David Lunderberg, Craig Butt, Graham F Peaslee, Heather M Stapleton, Jennifer A Field
Papers and textiles that treated with per- and polyfluoroalkyl substances (PFASs) are sources of human and environmental exposure. Data for individual PFASs, such as perfluorooctane sulfonate (PFOS) and perfluroooctanoate (PFOA), are not placed into the context of total fluorine for papers and textiles. Gas chromatography mass spectrometry (GC-MS) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) were used to quantify volatile and ionic PFASs, respectively, and the total oxidizable precursor (TOP) assay was used to quantify precursors that form perfluoroalkyl carboxylates...
July 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28709101/the-impact-of-prenatal-perfluoroalkyl-substances-exposure-on-neonatal-and-child-growth
#5
Mei-Huei Chen, Sharon Ng, Chia-Jung Hsieh, Ching-Chun Lin, Wu-Shiun Hsieh, Pau-Chung Chen
BACKGROUND: Perfluoroalkyl substances (PFASs) are wildly distributed environmental pollutants. Laboratory mice exposed prenatally to PFASs develop smaller birth weight but are more likely to become obese in adulthood. The evidences in human studies are still inconclusive. METHODS: The participants were 429 mother-infant pairs from Taiwan Birth Panel Study. These children were followed serially and growth data were collected through face to face interviews and records in Child Healthcare Handbooks until 108months of age...
July 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28704677/hydrated-electron-based-decomposition-of-perfluorooctane-sulfonate-pfos-in-the-vuv-sulfite-system
#6
Yurong Gu, Tongzhou Liu, Hongjie Wang, Huili Han, Wenyi Dong
As one of the most reactive species, hydrated electron (eaq(-)) is promising for reductive decomposition of recalcitrant organic pollutants, such as perfluorooctane sulfonate (PFOS). In this study, PFOS decomposition using a vacuum ultraviolet (VUV)/sulfite system was systematically investigated in comparison with sole VUV and ultraviolet (UV)/sulfite systems. A fast and nearly complete (97.3%) PFOS decomposition was observed within 4h from its initial concentration of 37.2μM in the VUV/sulfite system. The observed rate constant (kobs) for PFOS decomposition in the studied system was 0...
July 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28704675/effect-of-single-wall-carbon-nanotubes-on-bioconcentration-and-toxicity-of-perfluorooctane-sulfonate-in-zebrafish-danio-rerio
#7
Yaxuan Li, Bin Men, Yi He, Haiming Xu, Meiqi Liu, Dongsheng Wang
The wide application of nanoparticles will lead its release into the aquatic environment, which may alter the bioavailability and toxicity of other contaminants to aquatic organisms. This work aimed to study the effects of perfluorooctane sulfonate (PFOS), single-wall carbon nanotubes (SWCNT), and their mixture on PFOS accumulation, antioxidant defenses and acetylcholinesterase (AChE) activity in zebrafish. The fish was dissected after being exposed (24, 48, 72 and 96h) separately to PFOS, SWCNT and PFOS+SWCNT co-exposure...
July 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28701769/perfluorooctane-sulfonate-affects-intestinal-immunity-against-bacterial-infection
#8
Caixia Suo, Zhiqin Fan, Liang Zhou, Ju Qiu
Perfluorooctane sulfonate (PFOS) is an environmental contaminant that has been manufactured to be used as surfactants and repellents in industry. Due to long half-life for clearance and degradation, PFOS is accumulative in human body and has potential threat to human health. Previous studies have shown the development and function of immune cells can be affected by PFOS. Although PFOS has a high chance of being absorbed through the oral route, whether and how PFOS affects immune cells in the gut is unknown...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692894/occurrence-survey-and-spatial-distribution-of-perfluoroalkyl-and-polyfluoroalkyl-surfactants-in-groundwater-surface-water-and-sediments-from-tropical-environments
#9
Gabriel Munoz, Pierre Labadie, Fabrizio Botta, François Lestremau, Benjamin Lopez, Emmanuel Geneste, Patrick Pardon, Marie-Hélène Dévier, Hélène Budzinski
The occurrence and spatial distribution of 22 selected perfluoroalkyl and polyfluoroalkyl substances (PFASs) in surface water (n=75), groundwater (n=80) and surficial sediment (n=15) were investigated for the first time in the tropical areas constituted by the French Overseas Territories (French Guiana, Guadeloupe, Martinique, Mayotte and Reunion). Descriptive statistics and correlations between PFASs were evaluated through the use of specific statistical treatments to handle left-censored data ("non-detects")...
July 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28688604/serum-concentrations-of-per-and-poly-fluoroalkyl-substances-and-factors-associated-with-exposure-in-the-general-adult-population-in-south-korea
#10
Jin Heon Lee, Chae Kwan Lee, Chun-Hui Suh, Hee-Sook Kang, Chun-Pyo Hong, Suk-Nam Choi
Per- and polyfluoroalkyl substances (PFASs) are ubiquitous contaminants found worldwide, including in South Korea. As a result, they are frequently detected in Koreans. However, there is limited representative data and information on potential sources in Korea. Therefore, we measured the serum concentrations of ten PFASs in nationally representative samples of the Korean population (n=1874, 18-69 years) and evaluated the factors associated with their exposure. Serum PFOS, PFDA, PFOA, and PFNA were detected in nearly all participants (83...
June 24, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28683408/dissimilar-effects-of-organohalogenated-compounds-on-thyroid-hormones-in-glaucous-gulls
#11
Marte Melnes, Geir W Gabrielsen, Dorte Herzke, Kjetil Sagerup, Bjørn Munro Jenssen
The glaucous gull (Larus hyperboreus) is an arctic top predator and scavenger exposed to high levels of mixtures of organohalogenated contaminants (OHCs) of which many interfere with the thyroid hormone (TH) system. In the present study, we applied statistical modeling to investigate the potential combined influence of the mixture of chlorinated, brominated and perfluorinated organic compounds in plasma of glaucous gulls on their plasma TH concentrations. In females, there were significant negative associations between several organochlorinated compounds (OCs) and free thyroxin (FT4) and triiodothyronine (FT3), indicating additive negative effects on FT4 and FT3...
July 3, 2017: Environmental Research
https://www.readbyqxmd.com/read/28679074/occurrence-and-dietary-exposure-assessment-of-pfos-and-pfoa-in-cultured-trachinotus-ovatus-in-china
#12
Di Meng, Mengmeng Guo, Yongzhong Qian, Gang Han
In this study, investigation was conducted into concentrations of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in Chinese farmed Trachinotus ovatus between 2014 and 2015 using a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) and ultra fast liquid chromatography-tandem mass spectrometry (UFLC-MS/MS) method. The tissue distribution (muscle, skin, liver, kidney and gill) in Trachinotus ovatus was also assessed. The detection frequencies of PFOS and PFOA in fish were 92% and 3%, respectively, and the mean concentrations were 0...
July 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28679050/evidence-for-the-trophic-transfer-of-perfluoroalkylated-substances-in-a-temperate-macrotidal-estuary
#13
Gabriel Munoz, Hélène Budzinski, Marc Babut, Hilaire Drouineau, Mathilde Lauzent, Karyn Le Menach, Jérémy Lobry, Jonathan Selleslagh, Caroline Simonnet-Laprade, Pierre Labadie
The present survey examines the trophodynamics of a suite of 19 perfluoroalkyl substances (PFASs) in a temperate macrotidal estuary (Gironde, SW France). Across the 147 biota samples (18 taxa) collected, perfluorooctane sulfonate (PFOS), perfluorooctane sulfonamide (FOSA), and C8-C14 perfluoroalkyl carboxylates (PFCAs) were the most-recurrent analytes. ΣPFASs ranged between 0.66-45 ng per g of wet weight of the whole body. Benthic organisms had relatively high ΣPFASs compared to demersal organisms and displayed specific composition profiles with higher relative abundances of C8 and C9 PFCAs...
July 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28675102/the-occurrence-exposure-and-risk-assessment-of-perfluoroalkyl-acids-in-food-from-mainland-china
#14
Xinxuan Wang, Ruobing Zhang, Hong Zhang, Yanping Wang
To study the contamination of perfluoroalkyl acids (PFAAs) in Chinese food and the risk of dietary exposure for the Chinese population, the data of 17 PFAAs covering 38 cities throughout China in 15 groups of foods were collected for meta-analysis from published and available research literature. Using food consumption and body weight parameters, estimated dietary intakes (EDIs) were calculated for evaluation using the Scenario-Based Risk Assessment (SceBRA) modelling. Among food groups, the highest ΣPFAAs concentrations and EDI contributions were both found in poultry (363 ng/g), fish and shrimp (313 ng/g), dark vegetables (309 ng/g), fruits (116 ng/g) and pork (25 ng/g)...
July 11, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28665121/role-of-snow-deposition-of-perfluoroalkylated-substances-at-coastal-livingston-island-maritime-antarctica
#15
Paulo Casal, Yifeng Zhang, Jonathan W Martin, Mariana Pizarro, Begoña Jiménez, Jordi Dachs
Perfluoroalkyl substances (PFAS) are ubiquitous in the environment, including remote polar regions. To evaluate the role of snow deposition as an input of PFAS to Maritime Antarctica, fresh snow deposition, surface snow, streams from melted snow, coastal seawater, and plankton samples were collected over a three-month period (December 2014-February 2015) at Livingston Island. Local sources of PFASs were significant for perfluoroalkyl sulfonates (PFSAs) and C7-14 perfluoroalkyl carboxylates (PFCAs) in snow but limited to the transited areas of the research station...
July 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28662452/estimating-human-exposure-to-perfluoroalkyl-acids-via-solid-food-and-drinks-implementation-and-comparison-of-different-dietary-assessment-methods
#16
Eleni Papadopoulou, Somrutai Poothong, Jacco Koekkoek, Luisa Lucattini, Juan Antonio Padilla-Sánchez, Margaretha Haugen, Dorte Herzke, Stig Valdersnes, Amund Maage, Ian T Cousins, Pim E G Leonards, Line Småstuen Haug
BACKGROUND: Diet is a major source of human exposure to hazardous environmental chemicals, including many perfluoroalkyl acids (PFAAs). Several assessment methods of dietary exposure to PFAAs have been used previously, but there is a lack of comparisons between methods. AIM: To assess human exposure to PFAAs through diet by different methods and compare the results. METHODS: We studied the dietary exposure to PFAAs in 61 Norwegian adults (74% women, average age: 42 years) using three methods: i) by measuring daily PFAA intakes through a 1-day duplicate diet study (separately in solid and liquid foods), ii) by estimating intake after combining food contamination with food consumption data, as assessed by 2-day weighted food diaries and iii) by a Food Frequency Questionnaire (FFQ)...
June 26, 2017: Environmental Research
https://www.readbyqxmd.com/read/28657892/plasma-perfluoroalkyl-and-polyfluoroalkyl-substances-concentration-and-menstrual-cycle-characteristics-in-preconception-women
#17
Wei Zhou, Lulu Zhang, Chuanliang Tong, Fang Fang, Shasha Zhao, Ying Tian, Yexuan Tao, Jun Zhang
BACKGROUND: Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are persistent synthetic chemicals that are widely used in industrial applications and often detectable in humans. In rats, PFASs can interfere with the estrous cycle. In humans, menstruation has been viewed as a proxy of female fecundity, and periodic menstruation plays a critical role in endometrial sloughing in the absence of pregnancy and in preparing for embryo implantation. OBJECTIVES: We investigated the association between PFAS exposure and menstrual cycle characteristics in women who plan to become pregnant...
June 22, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28654807/per-and-poly-fluoroalkyl-compounds-in-freshwater-fish-from-the-rh%C3%A3-ne-river-influence-of-fish-size-diet-prey-contamination-and-biotransformation
#18
Marc Babut, Pierre Labadie, Caroline Simonnet-Laprade, Gabriel Munoz, Marie-Claude Roger, Benoit J D Ferrari, Hélène Budzinski, Eve Sivade
Pools of aquatic plants and benthic invertebrates were collected along with 47 individuals from three cyprinid fish species (Barbus barbus, Gobio gobio, Rutilus rutilus) at a site in the Rhône River (France). Carbon and nitrogen isotopic ratios (δ(13)C and δ(15)N) and a wide range of per- and poly-fluorinated chemicals (PFASs) were analysed in all samples. The sum of PFAS concentrations (ΣPFAS) increased from aquatic plants to fish dorsal muscles; molecular profiles were dominated by C9-C13 perfluorocarboxylic acids (PFCAs), while perfluorooctane sulfonate (PFOS) and perfluorooctane sulfonamide (FOSA) were detected in all samples at lower concentrations...
June 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28654245/effects-of-in-utero-pfos-exposure-on-transcriptome-lipidome-and-function-of-mouse-testis
#19
Keng Po Lai, Jetty Chung-Yung Lee, Hin Ting Wan, Jing Woei Li, Aman Yi-Man Wong, Ting Fung Chan, Camille Oger, Jean-Marie Galano, Thierry Durand, Kin Sum Leung, Cherry C Leung, Rong Li, Chris Kong-Chu Wong
Transcriptomic and LC-MS/MS-based targeted lipidomic analyses were conducted to identify the effects of in utero PFOS exposure on neonatal testes and its relation to testicular dysfunction in adult offspring. Pregnant mice were orally administered 0.3 and 3 μg PFOS/g body weight until term. Neonatal testes (P1) were collected for the detection of PFOS, and were subjected to omics study. Integrated pathway analyses using DAVID, KEGG, and IPA underlined the effects of PFOS exposure on lipid metabolism, oxidative stress and cell junction signaling in testes...
July 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28649486/constrictive-pericarditis-induced-shunting-through-a-pfo-persistence-despite-pericardiectomy
#20
Emily Schuiteman, Thomas Verrill, Nader Mina, Bhavinkumar Dalal
A patent foramen ovale (PFO) is found in around 25-30% of patients. The discovery is often made only on autopsy, as most PFOs are clinically silent and any inter-atrial blood exchange typically shunts from the left to right heart [1]. Thus, when a patient presents with hypoxic respiratory failure, concern for presence of a PFO is rarely at the top of the differential. However, in the setting of elevated right heart pressures, PFOs can become of great hemodynamic importance and can lead to deadly complications, including right to left shunting and refractory hypoxic respiratory failure...
2017: Respiratory Medicine Case Reports
keyword
keyword
13240
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"