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https://www.readbyqxmd.com/read/28335995/assessment-of-dietary-exposure-to-organohalogen-contaminants-legacy-and-emerging-flame-retardants-in-a-norwegian-cohort
#1
Fuchao Xu, Joo-Hui Tay, Adrian Covaci, Juan Antonio Padilla-Sánchez, Eleni Papadopoulou, Line Småstuen Haug, Hugo Neels, Ulla Sellström, Cynthia A de Wit
Polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), emerging halogenated flame retardants (EHFRs) and organophosphate flame retardants (PFRs) were detected in 24h duplicate diet samples from a Norwegian cohort (n=61), with concentrations ranging from <method limit of quantification (MLQ)-0.64ng/g ww, <MLQ-0.70ng/g ww, <MLQ-0.93ng/g ww, <MLQ-0.14ng/g ww, and <MLQ-150ng/g ww, respectively. All studied contaminants were detected in the duplicate diet samples with detection frequencies (DF) ranging from 1...
March 20, 2017: Environment International
https://www.readbyqxmd.com/read/28332915/effects-of-sampling-interval-on-the-passive-air-sampling-of-atmospheric-pcbs-levels
#2
Ahmet Egemen Sakin, Fatma Esen, Yucel Tasdemir
In this study, we collected Polychlorinated biphenyls (PCBs) using passive air samplers (PASs), between February 4, 2013 and February 2, 2014, with the sampling periods ranging from 10 to 60 days. The samples were collected with PASs that contained polyurethane foam (PUF). With these samples, 87 PCB congeners were analyzed. Sampling coefficient (R) values for the four seasons were calculated using both the high volume air sampler (HVAS) and PAS samples collected with the same time interval. The average of the annual concentrations of 87 PCB congeners, calculated using the R values specific to this study, was 234 ± 175 pg/m(3)...
March 23, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28332723/evidence-for-persistent-organochlorine-pollutants-in-the-human-adrenal-cortex
#3
Enza Fommei, Roberta Turci, Andrea Ripoli, Silvana Balzan, Fabrizio Bianchi, Luca Morelli, Alessio Coi
Environmental pollutants may act as endocrine disruptors in animals. Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) enter the food chain and may accumulate in the fatty animal tissues, including adrenals. To our knowledge, no previous study has investigated their presence in the human normal adrenal (NA) cortex and aldosterone-producing adenomas (APA). Surgical fragments of APA from 11 patients and NA from 8 kidney donors were analyzed for 16 PCBs congeners and 10 OCPs. A Matrix Solid-Phase Dispersion (MSPD) method for simultaneous determination of the target compounds in cortex homogenates was developed...
March 23, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28332084/molecularly-imprinted-membranes-mims-for-selective-removal-of-polychlorinated-biphenyls-pcbs-in-environmental-waters-fabrication-and-characterization
#4
Dennis S Mkhize, Hlengilizwe Nyoni, Laura P Quinn, Bhekie B Mamba, Titus A M Msagati
Molecularly imprinted membranes (MIMs) with selective removal properties for polychlorinated biphenyls (PCBs) were prepared through the phase inversion technique. The MIMs were obtained from casting the viscous solutions of molecularly imprinted polymers (MIPs), polysulfone (PSf), and N-methyl-2-pyrrolidone (NMP) as the casting solvent. Different membranes were prepared at different concentration of MIPs and PSf. The resulting MIMs were characterized by atomic force microscope (AFM), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR)...
March 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28329713/pcbs-and-ocps-in-human-milk-in-eastern-siberia-russia-levels-temporal-trends-and-infant-exposure-assessment
#5
Elena A Mamontova, Eugenia N Tarasova, Alexander A Mamontov
The aim of our study is to investigate the spatial distribution of polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethane (p,p'-DDT) and its metabolites, α- and γ-isomers of hexachlorocyclohexane (HCH) in 155 samples of human milk (HM) from Eastern Siberia (six towns and seven villages in Irkutsk Region, one village of the Republic of Buryatia and one town in Zabaikal'sk Region, Russia), and to examine the dietary and social factors influencing the human exposure to the organochlorines...
March 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28325610/depositional-history-and-inventories-of-polychlorinated-biphenyls-pcbs-in-sediment-cores-from-an-antarctic-specially-managed-area-admiralty-bay-king-george-island
#6
Tatiane Combi, César C Martins, Satie Taniguchi, Juliana Leonel, Rafael André Lourenço, Rosalinda Carmela Montone
Temporal patterns, fluxes and inventories of polychlorinated biphenyls (PCBs) were assessed in nine sediment cores collected from selected areas of Admiralty Bay off the Antarctic Peninsula. Concentrations of total PCBs were low, but slightly higher in comparison to low-impacted, remote environments in the world, ranging from below the detection limit to 11.9ngg(-1) in dry weight. PCB concentrations and inventories suggest a possible minor influence related to the nearby logistic activities, especially in the sediment core collected close to the Ferraz Station...
March 18, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28324278/concentrations-and-origin-of-polychlorinated-biphenyls-pcbs-and-polycyclic-aromatic-hydrocarbons-pahs-in-sediments-of-western-spitsbergen-fjords-kongsfjorden-hornsund-and-adventfjorden
#7
Anna Pouch, Agata Zaborska, Ksenia Pazdro
Contaminant profiles in sediment cores represent valuable natural archives of environmental contamination, by which contaminant sources and historical changes in contaminant input and cycling may be recognized. In the present study, we discuss the sedimentary profiles and historical trends of organic contaminants - polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) - in three fjords of the Svalbard archipelago differing in environmental conditions and anthropogenic impact. The obtained results revealed no significant differences between the fjords Hornsund and Kongsfjorden, in the average levels of the analyzed contaminants...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28320535/optimization-of-selective-pressurized-liquid-extraction-of-organic-pollutants-in-placenta-to-evaluate-prenatal-exposure
#8
REVIEW
Tania Fernández-Cruz, Elena Martínez-Carballo, Jesús Simal-Gándara
The early exposure to organic pollutants (OPs) related to dietary habit or environmental exposure is a concern of growing interest in environmental health. When OPs enter the body, they can accumulate in fatty tissue and even travel through the bloodstream being able to cross the placenta and reach the fetus through the substance exchange between the mother and the child. Epidemiologic and clinical data affirm that these chemicals increase the risk of adverse effects during childhood. This article reviews and addresses one of the most relevant analytical methods for determining OPs in placenta...
March 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28319019/recycling-of-metals-from-pretreated-waste-printed-circuit-boards-effectively-in-stirred-tank-reactor-by-a-moderately-thermophilic-culture
#9
Ming-Chen Xia, Ya-Ping Wang, Tang-Jian Peng, Li Shen, Run-Lan Yu, Yuan-Dong Liu, Miao Chen, Jiao-Kun Li, Xue-Ling Wu, Wei-Min Zeng
To seek a feasible technique for processing waste printed circuit boards (PCBs), pretreatment of PCBs by table separation and further bioleached by moderate thermophiles in a stirred tank reactor were investigated. The shaking table separation, conducted after grinding and sieving of PCBs, produced two fractions: metal-rich parts (RPCBs), which is more suitable for pyrometallurgy process than untreated PCBs, and metal-poor parts (PPCBs) with only 8.83% metals was then bioleached by a mixed culture of moderate thermophiles effectively...
March 15, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28315012/chlorinated-biphenyls-effect-on-estrogen-related-receptor-expression-steroid-secretion-mitochondria-ultrastructure-but-not-on-mitochondrial-membrane-potential-in-leydig-cells
#10
Agnieszka Milon, Malgorzata Opydo-Chanek, Waclaw Tworzydlo, Jerzy Galas, Laura Pardyak, Alicja Kaminska, Anna Ptak, Malgorzata Kotula-Balak
To characterize polychlorinated biphenyls (PCBs) action on Leydig cells, PCBs congeners, low-chlorinated (delor 103; d103) and high-chlorinated ones (delor 106; d106) were selected. The cells were treated according to PCBs dose (d103 or d106 0.2 ng/ml in low doses:, or 2 ng/ml in high doses) and type (d103 + d106 in low doses or 103 + 106 in high doses). After 24 h treatment with PCBs, a distinct increase in estrogen-related receptors (ERRs type α, β and γ) expression was revealed. However, the dose- and type-dependent PCBs effect was mostly exerted on ERRα expression...
March 18, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28314564/hydroxylated-polychlorinated-biphenyl-metabolites-oh-pcbs-maternal-smoking-and-size-at-birth
#11
Katrina Kezios, Yiwei Gu, Xinhua Liu, Piera Cirillo, Darcy Tarrant, Myrto Petreas, Jun-Soo Park, Barbara Cohn, Pam Factor-Litvak
In a sample of 442 births from the Child Health and Development Studies cohort, we examined associations between maternal prenatal exposure to hydroxylated polychlorinated biphenyl metabolites (OH-PCBs) and pregnancy outcomes, and whether associations were mediated by maternal thyroid hormone levels and/or modified by maternal smoking. Compared to nonsmokers, smokers had twice the mean concentration of 4-OH-CB107 (p<0.001) and lower levels of its parent compound, PCB118 (p=0.001). Among mothers who smoked, the birth weight of newborns with maternal concentrations of 4-OH-CB107 in the upper quartile was 316g lighter (95% confidence interval (CI) 566, 65) compared to those with maternal concentrations in the lowest quartile, after control for PCB118 and other potential confounders...
March 14, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28306542/biomonitoring-of-danish-school-children-and-mothers-including-biomarkers-of-pbde-and-glyphosate
#12
Lisbeth E Knudsen, Pernille Winton Hansen, Seher Mizrak, Heidi K Hansen, Thit A Mørck, Flemming Nielsen, Volkert Siersma, Line Mathiesen
BACKGROUND: The Danish part of the large European Human biomonitoring pilot project Demonstration of a study to Coordinate and Perform Human biomonitoring on a European Scale (DEMOCOPHES) investigated the urine, hair and blood concentrations of 66 different environmental chemicals in a group of 145 Danish school children aged 6-11 years and their mothers from rural and urban areas in autumn 2011. Some - but not all - results were published; however, the concurrence of the chemicals has not been assessed...
March 17, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28303007/modeling-the-air-soil-exchange-secondary-emissions-and-residues-in-soil-of-polychlorinated-biphenyls-in-china
#13
Song Cui, Qiang Fu, Yi-Fan Li, Jianmin Ma, Chongguo Tian, Liyan Liu, Leiming Zhang
The present study investigated the environmental distribution and fate of low molecular weight (LMW) polychlorinated biphenyls (PCBs) in China using the ChnGIPERM (Chinese Gridded Industrial Pollutants Emission and Residue Model), in which the air-soil exchange, spatial-temporal variations and the heterogeneity of secondary emission and residue in the non-source areas were studied. The model simulated the temporal and spatial variations of the PCB28 concentration in soils and air which agreed well with historical monitoring data across China...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28301833/persistent-environmental-toxicants-in-breast-milk-and-rapid-infant-growth
#14
Rachel Criswell, Virissa Lenters, Siddhartha Mandal, Hein Stigum, Nina Iszatt, Merete Eggesbø
BACKGROUND/AIMS: Many environmental toxicants are passed to infants in utero and through breast milk. Exposure to toxicants during the perinatal period can alter growth patterns, impairing growth or increasing obesity risk. Previous studies have focused on only a few toxicants at a time, which may confound results. We investigated levels of 26 toxicants in breast milk and their associations with rapid infant growth, a risk factor for later obesity. METHODS: We used data from the Norwegian HUMIS study, a multi-center cohort of 2,606 mothers and newborns enrolled between 2002 and 2008...
March 17, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28297068/drug-eluting-balloons-for-resistant-arteriovenous-dialysis-access-stenosis
#15
Dimitrios Karnabatidis, Panagiotis Kitrou
Vascular access maintenance is vital for hemodialysis patients. Conventional balloon angioplasty is the gold standard of treatment in endovascular therapy according to published guidelines, accompanied by bare metal stents as a bail-out method. Several devices have been used so far with a view to improve patency outcomes, but only covered stents have been proposed as a valid alternative and only for venous juxta-anastomotic stenosis of arteriovenous grafts. Paclitaxel-coated balloons (PCBs) have been extensively investigated in the last few years in pilot studies with small numbers of patients in dialysis access...
March 6, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28292528/halogenated-organic-pollutants-in-marine-biota-from-the-xuande-atoll-south-china-sea-levels-biomagnification-and-dietary-exposure
#16
Yu-Xin Sun, Yong-Xia Hu, Zai-Wang Zhang, Xiang-Rong Xu, Heng-Xiang Li, Lin-Zi Zuo, Yi Zhong, Hong Sun, Bi-Xian Mai
Six marine biota species were collected from the Xuande Atoll, South China Sea to investigate the bioaccumulation of dichlorodiphenyltrichloroethane (DDT), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), decabromodiphenyl ethane (DBDPE) and dechlorane plus (DP). Pike conger (Muraenesox talabonoides) had the highest concentrations of halogenated organic pollutants (HOPs) among the six marine biota species. DDTs were the predominant HOPs, followed by PCBs and PBDEs, with minor contributions of DBDPE and DP...
March 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28291610/the-impact-of-the-1999-mw-7-4-event-in-the-%C3%A4-zmit-bay-turkey-on-anthropogenic-contaminant-pcbs-pahs-and-pbdes-concentrations-recorded-in-a-deep-sediment-core
#17
S Giuliani, L G Bellucci, M N Çağatay, A Polonia, R Piazza, M Vecchiato, S Pizzini, L Gasperini
The 1999 Mw 7.4 earthquake triggered a tremendous human tragedy and had a great social impact over the population of the İzmit Bay, one of the most industrialized area of Turkey. Although the successive environmental disasters were well documented, information on its sedimentary record is lacking. The present research aims at filling this gap, through the analysis of organic contaminants (PCBs, PAHs, and PBDEs) in a dated sediment core collected in the depocenter of the Karamürsel Basin in 2005. Profiles of total PCBs and total PAHs overlap the timing of industrialization in the area (starting in the 1960s) with values increasing as the population and the number of industrial plants grew larger...
March 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28290315/inactivation-modeling-of-human-enteric-virus-surrogates-ms2-q%C3%AE-and-%C3%AE-x174-in-water-using-uvc-leds-a-novel-disinfecting-system
#18
Do-Kyun Kim, Soo-Ji Kim, Dong-Hyun Kang
In order to assure the microbial safety of drinking water, UVC-LED treatment has emerged as a possible technology to replace the use of conventional low pressure (LP) mercury vapor UV lamps. In this investigation, inactivation of Human Enteric Virus (HuEV) surrogates with UVC-LEDs was investigated in a water disinfection system, and kinetic model equations were applied to depict the surviving infectivities of the viruses. MS2, Qβ, and ΦX 174 bacteriophages were inoculated into sterile distilled water (DW) and irradiated with UVC-LED printed circuit boards (PCBs) (266nm and 279nm) or conventional LP lamps...
January 2017: Food Research International
https://www.readbyqxmd.com/read/28288427/the-trophic-transfer-of-persistent-pollutants-hcb-ddts-pcbs-within-polar-marine-food-webs
#19
Simonetta Corsolini, Gianluca Sarà
Biomagnification (increase in contaminant concentrations at successively higher levels of trophic web), is a process that can transversally impair biodiversity and human health. Most research shows that biomagnification should be higher at poles with northern sites having a major tendency to biomagnify Persistent Organic Pollutants (POPs) through their marine food webs. We investigated the biomagnification degree into two marine trophic webs combining carbon and nitrogen stable isotopes and POP analyses. We showed that the Antarctic trophic web was more depleted than the sub-Arctic one and the differences highlighted for the basal part could explain the difference in length between them...
February 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/28287790/cocaine-self-administration-in-male-and-female-rats-perinatally-exposed-to-pcbs-evaluating-drug-use-in-an-animal-model-of-environmental-contaminant-exposure
#20
Mellessa M Miller, Abby E Meyer, Jenna L N Sprowles, Helen J K Sable
Polychlorinated biphenyls (PCBs) are ubiquitous environmental toxicants known to adversely impact human health. Ortho-substituted PCBs affect the nervous system, including the brain dopaminergic system. The reinforcing effects of psychostimulants are typically modulated via the dopaminergic system, so this study used a preclinical (i.e., rodent) model to evaluate whether developmental contaminant exposure altered intravenous self-administration (IV SA) for the psychostimulant cocaine. Long-Evans rats were perinatally exposed to 6 or 3 mg/kg/day of PCBs throughout gestation and lactation and compared with nonexposed controls...
March 13, 2017: Experimental and Clinical Psychopharmacology
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