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https://www.readbyqxmd.com/read/27908622/biomonitoring-of-persistent-organic-pollutants-pops-in-child-populations-living-near-contaminated-sites-in-mexico
#1
R Flores-Ramírez, F J Pérez-Vázquez, M Rodríguez-Aguilar, S E Medellín-Garibay, E Van Brussel, A C Cubillas-Tejeda, L Carrizales-Yáñez, F Díaz-Barriga
The aim of this study was to conduct a POP biomonitoring programme for children in high-risk areas. We evaluated 247 serum samples from children between the ages of 6 and 12years old from two zones in Mexico: (1) indigenous zones, which included Cuatlamayan (CUA), Tocoy (TOC), and Santa Maria Picula (SAM); and (2) industrial zones, which included Tercera Chica (TC), Industrial San Luis (IND) and Rincon de San Jose (SJR); Mundo Nuevo (MN); and Alpuyeca (ALP). Our results showed that α-endosulfan was similar to CUA, TOC, SAM, TC and MN (178...
November 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27900525/in-focus-in-hcb
#2
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
November 29, 2016: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/27890414/developmental-neurotoxicants-in-human-milk-comparison-of-levels-and-intakes-in-three-european-countries
#3
Eliška Čechová, Martin Scheringer, Marta Seifertová, Ondřej Mikeš, Kristýna Kroupová, Jan Kuta, Joan Forns, Merete Eggesbø, Ilona Quaak, Marijke de Cock, Margot van de Bor, Henrieta Patayová, Ľubica Palkovičová Murínová, Anton Kočan
Developmental neurotoxicants (DNTs), such as methylmercury (MeHg), polychlorinated biphenyls (PCBs) and selected organochlorine pesticides (OCPs), have gained increasing interest recently due to their possible relation to developmental disorders in children, which are increasing worldwide. We analyzed levels of 14 developmental neurotoxicants in human milk samples from Slovakia (n=37), the Netherlands (n=120) and Norway (n=388). Positive identification for most target analytes was >95% in all samples. In all three countries MeHg was measured for the first time in mother milk...
November 24, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27884466/linking-pollutant-exposure-of-humpback-whales-breeding-in-the-indian-ocean-to-their-feeding-habits-and-feeding-areas-off-antarctica
#4
Krishna Das, Govindan Malarvannan, Alin Dirtu, Violaine Dulau, Magali Dumont, Gilles Lepoint, Philippe Mongin, Adrian Covaci
Humpback whales, Megaptera novaeangliae, breeding off la Reunion Island (Indian Ocean) undergo large-scale seasonal migrations between summer feeding grounds near Antarctica and their reproductive winter grounds in the Indian Ocean. The main scope of the current study was to investigate chemical exposure of humpback whales breeding in the Indian Ocean by providing the first published data on this breeding stock concerning persistent organic pollutants (POPs), namely polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), hexachlorocyclohexanes (HCHs), DDT and its metabolites (DDTs), chlordane compounds (CHLs), polybrominated diphenyl ethers (PBDEs), and methoxylated PBDEs (MeO-PBDEs)...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27881186/the-social-network-around-influenza-vaccination-in-health-care-workers-a-cross-sectional-study
#5
Anna Llupià, Joaquim Puig, Guillermo Mena, José M Bayas, Antoni Trilla
BACKGROUND: Influenza vaccination coverage remains low among health care workers (HCWs) in many health facilities. This study describes the social network defined by HCWs' conversations around an influenza vaccination campaign in order to describe the role played by vaccination behavior and other HCW characteristics in the configuration of the links among subjects. METHODS: This study used cross-sectional data from 235 HCWs interviewed after the 2010/2011 influenza vaccination campaign at the Hospital Clinic of Barcelona (HCB), Spain...
November 24, 2016: Implementation Science: IS
https://www.readbyqxmd.com/read/27831922/the-association-between-single-nucleotide-polymorphisms-of-the-apelin-gene-and-diabetes-mellitus-in-a-chinese-population
#6
Hui Zheng, Xiaofang Fan, Xuesong Li, Yu Zhang, Yujuan Fan, Ning Zhang, Yuping Song, Fengdong Ren, Chunfang Shen, Jiayi Shen, Jialin Yang
BACKGROUND: The objective of the study was to analyze the association of apelin gene (APLN) single nucleotide polymorphisms (SNPs) and type 2 diabetes mellitus (T2DM). METHODS: A total of 1966 subjects were enrolled in this study, including 168 cases (first batch), 330 cases (second batch), and 1468 nondiabetic controls. The SNPs in the HapMap-HCB of APLN were detected using Sequenom MassARRAY SNP technology and included rs2281068, rs3115757, rs2235309, and rs2235310...
December 1, 2016: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/27825712/untargeted-metabolomic-analysis-of-human-serum-samples-associated-with-exposure-levels-of-persistent-organic-pollutants-indicate-important-perturbations-in-sphingolipids-and-glycerophospholipids-levels
#7
Daniel Carrizo, Olivier P Chevallier, Jayne V Woodside, Sarah F Brennan, Marie M Cantwell, Geraldine Cuskelly, Christopher T Elliott
Persistent organic pollutants (POPs) are distributed globally and are associated with adverse health effects in humans. A study combining gas chromatography-mass spectrometry (GC-MS), high resolution mass spectrometry (UPLC-QTof-MS) and chemometrics for the analysis of adult human serum samples was undertaken. Levels of serum POPs found were in the low range of what has been reported in similar populations across Europe (median 33.84 p, p'-DDE, 3.02 HCB, 83.55 β-HCH, 246.62 PCBs ng/g lipids). Results indicated that compounds concentrations were significantly different between the two groups of POPs exposure (high vs low) and classes (DDE, β-HCH, HCB, PCBs)...
November 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27825649/sources-atmospheric-transport-and-deposition-mechanism-of-organochlorine-pesticides-in-soils-of-the-tibetan-plateau
#8
Laiguo Chen, Qianhua Feng, Qiusheng He, Yumei Huang, Yu Zhang, Guo Jiang, Wei Zhao, Bo Gao, Kui Lin, Zhencheng Xu
Because of mountain cold-trapping, the soil in the Tibetan Plateau may be an important global sink of organochlorine pesticides (OCPs). However, there are limited data on OCPs in the soils of the Tibetan Plateau. In addition, the atmospheric transport and deposition mechanisms of OCPs also need to be further studied. In this study, the sampling area covered most regions of the Tibetan Plateau. The detection frequencies of ΣChlordane (sum of trans-chlordane, cis-chlordane and oxychlordane), HCB, ΣNonachlor (sum of trans- and cis-nonachlor), DDTs, ΣEndo (sum of endosulfan-I, endosulfan-II and endosulfate), aldrin, HCHs, ΣHeptachlor (sum of heptachlor and heptachlor epoxide), mirex and dieldrin were 100%, 98...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27822694/occurrence-sources-and-risk-assessment-of-ocps-in-surface-sediments-from-urban-rural-and-reclamation-affected-rivers-of-the-pearl-river-delta-china
#9
Wei Wang, Junhong Bai, Min Xi, Qingqing Zhao, Guangliang Zhang, Xiaojun Wen, Rong Xiao
Sediments were collected to a depth of 20 cm from urban, rural, and reclamation-affected rivers in the Pearl River Delta of China. In total, 16 organochlorine pesticides (OCPs) were analyzed in all sediment samples, and the occurrence, possible sources, toxicity, and health risks of OCPs were evaluated to compare the contamination characteristics of OCPs in sediments among the three types of rivers. The results showed that concentrations of Σ16OCPs in sediments from the three rivers followed the order urban river > reclamation-affected river > rural river, with a mean value of 247...
November 8, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27814542/predictors-of-pesticide-concentrations-in-freshwater-trout-the-role-of-life-history
#10
Rachel C Scholes, Kimberly J Hageman, Gerard P Closs, Claudine H Stirling, Malcolm R Reid, Rasmus Gabrielsson, Jason M Augspurger
Concentrations of halogenated pesticides in freshwater fish can be affected by age, size, trophic position, and exposure history. Exposure history may vary for individual fish caught at a single location due to different life histories, e.g. they may have hatched in different tributaries before migrating to a specific lake. We evaluated correlations of pesticide concentrations in freshwater brown trout (Salmo trutta) from the Clutha River, New Zealand, with potential predictors including capture site, age, length, trophic level, and life history...
October 28, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27802588/gene-profiles-in-a-smoke-induced-copd-mouse-lung-model-following-treatment-with-mesenchymal-stem-cells
#11
You-Sun Kim, Nurdan Kokturk, Ji-Young Kim, Sei Won Lee, Jaeyun Lim, Soo Jin Choi, Wonil Oh, Yeon-Mok Oh
Mesenchymal stem cells (MSCs) effectively reduce airway inflammation and regenerate the alveolus in cigarette- and elastase-induced chronic obstructive pulmonary disease (COPD) animal models. The effects of stem cells are thought to be paracrine and immune-modulatory because very few stem cells remain in the lung one day after their systemic injection, which has been demonstrated previously. In this report, we analyzed the gene expression profiles to compare mouse lungs with chronic exposure to cigarette smoke with non-exposed lungs...
October 2016: Molecules and Cells
https://www.readbyqxmd.com/read/27796529/in-focus-in-hcb-from-cell-biology-to-tissue-structure-and-function
#12
EDITORIAL
Esther Asan
No abstract text is available yet for this article.
October 31, 2016: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/27780102/persistent-organic-pollutants-in-sediment-and-fish-in-the-river-thames-catchment-uk
#13
Qiong Lu, Monika D Jürgens, Andrew C Johnson, Carola Graf, Andy Sweetman, John Crosse, Paul Whitehead
Some organic pollutants including polychlorinated biphenyls (PCBs), polybrominated diphenylethers (PBDEs) and hexachlorobenzene (HCB) have been banned from production and use in the UK for >30years but due to their toxicity and persistence are still of concern. However, due to their hydrophobicity they are present at very low concentrations and are difficult to measure in water, and so other matrices need to be sampled in order to best assess contamination. This study measured concentrations of ΣICES 7 PCBs (PCB congeners 28, 52, 101, 118, 138, 153 and 180) and Σ6 PBDEs (PBDE congeners 28, 47, 99, 100, 153, 154) and HCB in both bed-sediments and wild roach (a common pelagic fish) in the Thames Basin...
October 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27771571/environmental-exposure-to-human-carcinogens-in-teenagers-and-the-association-with-dna-damage
#14
Carmen Franken, Gudrun Koppen, Nathalie Lambrechts, Eva Govarts, Liesbeth Bruckers, Elly Den Hond, Ilse Loots, Vera Nelen, Isabelle Sioen, Tim S Nawrot, Willy Baeyens, Nicolas Van Larebeke, Francis Boonen, Daniëlla Ooms, Mai Wevers, Griet Jacobs, Adrian Covaci, Thomas Schettgen, Greet Schoeters
BACKGROUND: We investigated whether human environmental exposure to chemicals that are labeled as (potential) carcinogens leads to increased (oxidative) damage to DNA in adolescents. MATERIAL AND METHODS: Six hundred 14-15-year-old youngsters were recruited all over Flanders (Belgium) and in two areas with important industrial activities. DNA damage was assessed by alkaline and formamidopyrimidine DNA glycosylase (Fpg) modified comet assays in peripheral blood cells and analysis of urinary 8-hydroxydeoxyguanosine (8-OHdG) levels...
January 2017: Environmental Research
https://www.readbyqxmd.com/read/27743729/persistent-organic-pollutants-in-early-pregnancy-and-risk-of-gestational-diabetes-mellitus
#15
Marina Vafeiadi, Theano Roumeliotaki, Georgia Chalkiadaki, Panu Rantakokko, Hannu Kiviranta, Eleni Fthenou, Soterios A Kyrtopoulos, Manolis Kogevinas, Leda Chatzi
BACKGROUND: Persistent organic pollutants (POPs) are a group of diverse substances, including polychlorinated biphenyls (PCBs) and organochlorine pesticides that are resistant to biodegradation and ubiquitously present in our environment. Exposure to endocrine disrupting chemicals such as POPs has been linked to type 2 diabetes and metabolic disturbances in epidemiological and animal studies, but little is known about POPs exposure during pregnancy and the development of gestational diabetes mellitus (GDM)...
October 12, 2016: Environment International
https://www.readbyqxmd.com/read/27742439/spatial-variation-in-the-accumulation-of-pops-and-mercury-in-bottlenose-dolphins-of-the-lower-florida-keys-and-the-coastal-everglades-south-florida
#16
France Damseaux, Jeremy J Kiszka, Michael R Heithaus, George Scholl, Gauthier Eppe, Jean-Pierre Thomé, Jennifer Lewis, Wensi Hao, Michaël C Fontaine, Krishna Das
The bottlenose dolphin (Tursiops truncatus) is an upper trophic level predator and the most common cetacean species found in nearshore waters of southern Florida, including the Lower Florida Keys (LFK) and the Florida Coastal Everglades (FCE). The objective of this study was to assess contamination levels of total mercury (T-Hg) in skin and persistent organic pollutants (PCBs, PBDEs, DDXs, HCHs, HCB, Σ PCDD/Fs and Σ DL-PCBs) in blubber samples of bottlenose dolphins from LFK (n = 27) and FCE (n = 24)...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27726598/application-of-the-quechers-method-for-the-determination-of-organochlorine-pesticide-residues-in-brazilian-fruit-pulps-by-gc-ecd
#17
Mário Paz, Luísa Correia-Sá, Carla B Vidal, Helena Becker, Elisane Longhinotti, Valentina F Domingues, Cristina Delerue-Matos
The Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method was applied to the extraction of 14 organochlorine pesticides (OCPs) residues from commercial fruit pulps available in supermarkets in Fortaleza, Northeastern Brazil. The analyses were carried out by gas chromatography (GC), coupled to an electron-capture detector (ECD), and were confirmed by GC-tandem mass spectrometry (MS). The parameters of the analytical method, such as accuracy, precision, linear range, limits of detection and quantification, were determined for each pesticide...
October 11, 2016: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/27700994/efficient-destruction-of-hexachlorobenzene-by-calcium-carbide-through-mechanochemical-reaction-in-a-planetary-ball-mill
#18
Yingjie Li, Qingnan Liu, Wenfeng Li, Yingzhou Lu, Hong Meng, Chunxi Li
Mechanochemical destruction (MCD) is a good alternative to traditional incineration for the destruction of persistent organic pollutants (POPs), like hexachlorobenzene (HCB), and the key is to find an efficient co-milling reagent. Toward this aim, HCB was milled with various reagents in a planetary ball mill at room temperature, and CaC2 was found to be the best one. HCB can be destroyed completely within 20 min at a mass ratio of CaC2/HCB = 0.9 and a rotation speed of 300 rpm. The ground samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy...
January 2017: Chemosphere
https://www.readbyqxmd.com/read/27696516/fish-bioconcentration-studies-with-column-generated-analyte-concentrations-of-highly-hydrophobic-organic-chemicals
#19
Christian Schlechtriem, Leonard Böhm, Rebecca Bebon, Hans-Jörg Bruckert, Rolf-Alexander Düring
The performance of aqueous exposure bioconcentration fish tests according to Organisation for Economic Co-operation and Development (OECD) guideline 305 requires the possibility of preparing stable aqueous concentrations of the test substances. For highly hydrophobic organic chemicals (HOCs; octanol-water partition coefficient [log KOW ] > 5), testing via aqueous exposure may become increasingly difficult. A solid-phase desorption dosing system was developed to generate stable concentrations of HOCs without using solubilizing agents...
October 3, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27694046/linking-toxicity-profiles-to-pollutants-in-sludge-and-sediments
#20
Hana Stiborova, Michal Kolar, Jana Vrkoslavova, Jana Pulkrabova, Jana Hajslova, Katerina Demnerova, Ondrej Uhlik
Obtaining a complex picture of how pollutants synergistically influence toxicity of a system requires statistical correlation of chemical and ecotoxicological data. In this study, we determined concentrations of eight potentially toxic metals (PTMs) and four groups of organic pollutants in 15 sewage sludge and 12 river sediment samples, then linked measured contaminant concentrations to the toxicity of each matrix through constrained correspondence analysis (CCA). In sludge samples, Hg, As, hexachlorohexane (HCH), polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD) influenced the toxicity profiles, with the first four having significant effects and HBCD being marginally significant...
September 23, 2016: Journal of Hazardous Materials
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