keyword
MENU ▼
Read by QxMD icon Read
search

PCBs

keyword
https://www.readbyqxmd.com/read/28926786/polybrominated-diphenyl-ethers-and-indicator-polychlorinated-biphenyls-in-human-milk-from-china-under-the-stockholm-convention
#1
Lei Zhang, Shuaixing Yin, Yunfeng Zhao, Zhixiong Shi, Jingguang Li, Yongning Wu
Seven congeners of polybrominated diphenyl ethers (PBDEs) (BDE-28, BDE-47, BDE-99, BDE-100, BDE-153,BDE-154 and BDE-183) and six indicator polychlorinated biphenyls (PCBs) (PCB-28, PCB-52, PCB-101, PCB-138, PCB-153 and PCB-180) were measured in 32 regional pooled human milk samples originating from 1760 volunteering primiparous mothers to evaluate the current human body burden of general population and the temporal trend in China. Individual human milk samples were collected following a WHO-designed procedure...
September 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28924500/comparison-of-polybrominated-diphenyl-ethers-pbdes-and-polychlorinated-biphenyls-pcbs-in-the-serum-of-hypothyroxinemic-and-euthyroid-dogs
#2
Grace Lau, Kyla Walter, Philip Kass, Birgit Puschner
OBJECTIVE: To determine the profile of 14 polybrominated diphenyl ethers (PBDEs) and 23 polychlorinated biphenyls (PCBs) in serum of domestic canines and whether this was predictive of thyroid hormone status. SAMPLES: Serum samples were collected from 51 client-owned dogs visiting the University of California Davis William R. Pritchard Veterinary Medical Teaching Hospital during 2012 to 2016 for routine appointments. Fifteen dogs were diagnosed with hypothyroxinemia while 36 were euthyroid...
2017: PeerJ
https://www.readbyqxmd.com/read/28921373/released-fraction-of-polychlorinated-biphenyls-from-soil-biosolid-system-using-a-leaching-procedure-and-its-comparison-with-bioavailable-fraction-determined-by-wheat-plant-uptake
#3
Lourdes Jachero, Claudio Leiva, Inés Ahumada, Pablo Richter
The bioavailability of polychlorinated biphenyls (PCBs) in soils amended with biosolids was estimated using an aqueous leaching process of the compounds combined with rotating disk sorptive extraction (RDSE), and compared with bioavailability determined through of PCB absorption in wheat plants growing in the same soil-biosolid matrix. The matrices consisted of soil amended with biosolids at doses of 30, 90, and 200 Mg/ha, which increase concomitantly the organic matter content of the matrix. Considering that PCBs were natively absent in both the biosolids and soil used, the compounds were spiked in the biosolids and aged for 10 days...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28920759/spatial-distribution-of-polycyclic-aromatic-hydrocarbon-and-polychlorinated-biphenyl-sources-in-the-nakdong-river-estuary-south-korea
#4
Jun H Lee, Han J Woo, Kap S Jeong, Jeong W Kang, Jae U Choi, Eun J Jeong, Kap S Park, Dong H Lee
Our research team investigated the elemental composition and the presence of various toxic organic compounds, such as polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs), in estuary surface sediments to trace the spatial distribution of the sources of pollution deposited in Nakdong River, Busan, South Korea. The spatial patterns of elemental composition and toxic organic compounds were determined from the measurements of total organic carbon (TOC), total nitrogen, total sulfur, PAHs, and PCBs...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28918983/distribution-of-organic-contamination-of-sediments-from-ichkeul-lake-and-bizerte-lagoon-tunisia
#5
Fida Ben Salem, Olfa Ben Said, Ezzeddine Mahmoudi, Robert Duran, Mathilde Monperrus
Analyses of organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and butyl tins (BuSn) were conducted on sediments from Ichkeul Lake-Bizerte Lagoon watershed (Tunisia). A total of 59 compounds (16 PAHs, 12 PCBs, 22 OCPs and 9 BuSn) were measured in 40 surface sediment samples collected during two campaigns. High concentrations of total PAHs were identified in the lagoon ranging from 122 to 19600ng·g(-1). Several OCPs, including endrin, dieldrin, and lindane (Hexachlorocyclohexane or HCH or BHC) were found in high concentrations in Ichkeul Lake, ranging from 28 to 2012ngg(-1)...
September 14, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28915320/adipose-tissue-as-a-site-of-toxin-accumulation
#6
Erin Jackson, Robin Shoemaker, Nika Larian, Lisa Cassis
We examine the role of adipose tissue, typically considered an energy storage site, as a potential site of toxicant accumulation. Although the production of most persistent organic pollutants (POPs) was banned years ago, these toxicants persist in the environment due to their resistance to biodegradation and widespread distribution in various environmental forms (e.g., vapor, sediment, and water). As a result, human exposure to these toxicants is inevitable. Largely due to their lipophilicity, POPs bioaccumulate in adipose tissue, resulting in greater body burdens of these environmental toxicants with obesity...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28910963/placental-transfer-of-persistent-organic-pollutants-and-feasibility-using-the-placenta-as-a-non-invasive-biomonitoring-matrix
#7
Yunsun Jeong, Sunggyu Lee, Sunmi Kim, Jeongim Park, Hai-Joong Kim, Gyuyeon Choi, Sooran Choi, Sungjoo Kim, Su Young Kim, Sungkyoon Kim, Kyungho Choi, Hyo-Bang Moon
The placenta is a crucial organ for the supply of oxygen and nutritional elements from mother to fetus. Several studies have reported evidence of the placental transfer of persistent organic pollutants (POPs). Despite the importance of prenatal exposure to POPs, the transport process of POPs via the human placenta is not well understood. To investigate the transport processes of these contaminants and to assess the feasibility of the placenta as a non-invasive biological matrix, we measured 19 polychlorinated biphenyls (PCBs), 18 organochlorine pesticides (OCPs), and 24 polybrominated diphenyl ethers (PBDEs) in placenta tissues...
September 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28910252/lifetime-excess-cancer-risk-due-to-carcinogens-in-food-and-beverages-urban-versus-rural-differences-in-canada
#8
Roslyn Cheasley, C Peter Keller, Eleanor Setton
OBJECTIVES: To explore differences in urban versus rural lifetime excess risk of cancer from five specific contaminants found in food and beverages. METHODS: Probable contaminant intake is estimated using Monte Carlo simulations of contaminant concentrations in combination with dietary patterns. Contaminant concentrations for arsenic, benzene, lead, polychlorinated biphenyls (PCBs) and tetrachloroethylene (PERC) were derived from government dietary studies. The dietary patterns of 34 944 Canadians from 10 provinces were available from Health Canada's Canadian Community Health Survey, Cycle 2...
September 14, 2017: Canadian Journal of Public Health. Revue Canadienne de Santé Publique
https://www.readbyqxmd.com/read/28910084/changes-in-flame-retardant-and-legacy-contaminant-concentrations-in-indoor-air-during-building-construction-furnishing-and-use
#9
Simon Vojta, Lisa Melymuk, Jana Klánová
A newly constructed university building was selected for targeted assessment of changes in the levels of flame retardants and legacy contaminants during the installation of building equipment, furniture and electronics, and first year of building use. Indoor air samples were collected during several periods of intensive equipment installation to determine a relationship between newly-introduced equipment and changes in the concentrations and profiles of contaminants in indoor air. Samples were analysed for polybrominated diphenyl ethers (PBDEs), hexabromocyclododecanes (HBCDDs) and new types of flame retardants - brominated (BFRs) and organophosphate esters (OPEs)...
September 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28903176/assessment-of-pcbs-and-exposure-risk-to-infants-in-breast-milk-of-primiparae-and-multiparae-mothers-in-an-electronic-waste-hot-spot-and-non-hot-spot-areas-in-ghana
#10
Anita Asamoah, David Kofi Essumang, Jens Muff, Sergey V Kucheryavskiy, Erik Gydesen Søgaard
The aim of the study was to assess the levels of PCBs in the breast milk of some Ghanaian women at suspected hotspot and relatively non-hotspot areas and to find out if the levels of these PCBs pose any risk to the breastfed infants. A total of 128 individual human breast milk were sampled from both primiparae and multiparae mothers. The levels of PCBs in the milk samples were compared. Some of these mothers (105 individuals) work or reside in and around Agbogbloshie (hot-spot), the largest electric and electronic waste dump and recycling site in Accra, Ghana...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898957/persistent-organic-pollutants-in-krill-from-the-bellingshausen-south-scotia-and-weddell-seas
#11
Cristóbal J Galbán-Malagón, Gema Hernán, Esteban Abad, Jordi Dachs
Persistent organic pollutants (POPs) reach Antarctica through atmospheric transport, oceanic currents, and to minor extent, by migratory animals. The Southern Ocean is a net sink for many POPs, with a key contribution of the settling fluxes of POPs bound to organic matter (biological pump). However, little is known about POP transfer through the food web in the Southern Ocean and Antarctic waters, where krill is an important ecological node. In this study, we assessed the occurrence of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs) in Antarctic krill (Euphausia superba) from the Bellingshausen, South Scotia and Weddell Seas around the Antarctic Peninsula...
September 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898812/formation-of-hydroxylated-and-methoxylated-polychlorinated-biphenyls-by-bacillus-subtilis-new-insights-into-microbial-metabolism
#12
Jianteng Sun, Lili Pan, Lizhong Zhu
The detoxification and degradation of polychlorinated biphenyls (PCBs) have been studied. However, little information is available about the biological mechanisms involved in the metabolism of hydroxylated polychlorinated biphenyls (OH-PCBs) and methoxylated polychlorinated biphenyls (MeO-PCBs) by specific microorganism. In this study, the simultaneous formation of OH-PCB (major metabolite) and MeO-PCB (minor metabolite) was found in Bacillus subtilis after exposure to PCB. Interconversion between MeO-PCB and OH-PCB was also observed and the demethylation ratio of MeO-PCB was higher than the methylation ratio of OH-PCB...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898241/alterations-in-the-programming-of-energy-metabolism-in-adolescents-with-background-exposure-to-dioxins-dl-pcbs-and-pbdes
#13
Marike M Leijs, Janna G Koppe, Thomas Vulsma, Kees Olie, Wim M C van Aalderen, Pim de Voogt, Juliette Legler, Gavin W Ten Tusscher
OBJECTIVES: Dioxins and PCBs are highly toxic and persistent environmental pollutants that are measurable in humans worldwide. These persistent organic pollutants are associated with a higher incidence of diabetes mellitus. We hypothesise that perinatal (background) exposure to industrial pollutants like dioxins also influences body mass development and energy metabolism in later life. STUDY DESIGN: In The Netherlands, the perinatal exposure (prenatal exposure and postnatal lactational intake) to dioxins has been studied prospectively since 1987...
2017: PloS One
https://www.readbyqxmd.com/read/28892854/tissue-distribution-and-maternal-transfer-of-persistent-organic-pollutants-in-kentish-plovers-charadrius-alexandrines-from-cangzhou-wetland-bohai-bay-china
#14
Shucheng Zheng, Pu Wang, Huizhong Sun, Julius Matsiko, Yanfen Hao, Derong Meng, Yingming Li, Guogang Zhang, Qinghua Zhang, Guibin Jiang
Several persistent organic pollutants, including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and organochlorine pesticides (OCPs), were comprehensively investigated in the egg, muscle and liver samples of Kentish Plover (Charadrius alexandrines) collected from Cangzhou Wetland in western Bohai Bay, China. DDTs were the most abundant contaminants (35.4-9853ngg(-1) lipid weight, lw), followed by HCHs, PCBs, PBDEs and HCB...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28888117/biotransformation-antioxidant-and-histopathological-biomarker-responses-to-contaminants-in-european-and-american-yellow-eels-from-the-gironde-and-st-lawrence-estuaries
#15
Géraldine Patey, Catherine M Couillard, Fabien Pierron, Magalie Baudrimont, Patrice Couture
Since the early 1980s, populations of American (Anguilla rostrata) and European eels (Anguilla anguilla) have suffered a sharp decline. The causes of their decline are likely multifactorial and include chemical pollution. A field study was conducted in eight sites varying in organic and metal contamination along the St. Lawrence (Eastern Canada) and Gironde (France) systems to investigate the relationships among contaminants, biological characteristics and biotransformation, antioxidant and histopathological biomarkers in eels from both species...
August 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/28886414/serum-polychlorinated-biphenyls-and-leukocyte-telomere-length-in-a-highly-exposed-population-the-anniston-community-health-survey
#16
Catherine L Callahan, Marian Pavuk, Linda S Birnbaum, Xuefeng Ren, James R Olson, Matthew R Bonner
BACKGROUND: Serum polychlorinated biphenyls (PCBs) have previously been associated with longer leukocyte telomere length (LTL) in most, but not all, of the few previous studies. PCBs were produced in Anniston, Alabama from 1929 to 1971 and participants of the Anniston Community Health Survey (ACHS) were highly exposed. OBJECTIVES: We evaluated serum levels of 35 PCBs and relative telomere length in 559 ACHS participants. METHODS: Relative LTL was measured in DNA extracted from blood clots...
September 5, 2017: Environment International
https://www.readbyqxmd.com/read/28885748/extensive-study-on-physicochemical-properties-of-polychlorinated-biphenyls-in-a-commercial-ion-trap-mass-spectrometer-relevance-in-analytical-and-environmental-chemistry
#17
R Narizzano, F Risso, A Magherini, G Cordone, M Ottonelli, E Smirnova, S Nadotti, L Rivara, R La Rocca, E Magi, S Lottici, S Maggiolo, C E Pepe, M Garbarino
Polychlorinated biphenyls (PCBs) exist as 209 congeners, consisting of biphenyl molecules, where the number and substitution positions of halogen atoms are known to affect industrial uses, environmental transport mechanisms, distribution, fate, and toxicity. The complexity of the problem requires accurate physicochemical studies of an increasing number of congeners in order to understand the environmental and biological processes at play. This work presents a systematic study on the thermodynamic and kinetic properties of PCBs by quadrupole ion trap mass spectrometry...
September 8, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28882586/pcbs-and-measures-of-attention-and-impulsivity-on-a-continuous-performance-task-of-young-adults
#18
Bita Behforooz, Joan Newman, Mia V Gallo, Lawrence M Schell
The present study examines the relationship between current body burden of persistent PCBs and attention and impulsivity in 140 Akwesasne Mohawk young adults aged 17 to 21 whose environment has been contaminated by industrial effluent. Attention and impulsivity were measured by errors of omission, errors of commission, and patterns of reaction time responses on the Conners Continuous Performance Test. The PCB measure was the sum of those persistent PCB congeners detected in 50% of the participants. After adjusting for multiple covariates, regression analyses showed a significant positive relationship between PCB levels and omission scores, but only for males...
September 4, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28881309/in-situ-benthic-flow-through-chambers-to-determine-sediment-to-water-fluxes-of-legacy-hydrophobic-organic-contaminants
#19
Lukas Mustajärvi, Espen Eek, Gerard Cornelissen, Ann-Kristin Eriksson-Wiklund, Emma Undeman, Anna Sobek
Contaminated sediment can release hydrophobic organic contaminants (HOCs) and thereby act as a secondary source of primarily legacy hazardous substances to the water column. There is therefore a need for assessments of the release of HOCs from contaminated sediment for prioritization of management actions. In situ assessment of HOC sediment-to-water flux is currently done with (closed) benthic flux chambers, which have a sampling time exceeding one month. During this time, the water inside the chamber is depleted of oxygen and the effect of bioturbation on the sediment-to-water release of HOCs is largely ignored...
September 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28876910/dynamic-transgenerational-fate-of-polychlorinated-biphenyls-and-dioxins-furans-in-lactating-cows-and-their-offspring
#20
Christian Bogdal, Selina Züst, Peter Schmid, Tenzing Gyalpo, Anicia Zeberli, Konrad Hungerbühler, Markus Zennegg
We report on two farms in Switzerland heavily contaminated by polychlorinated biphenyls (PCBs) and dioxins (PCDD/Fs), occurring in the first case from diffuse sources and in the second case from PCB-containing wall paint. Extensive measurements of PCBs and PCDD/Fs on site (soil, forage, and paint) and in cattle (blood, fat, and milk) allowed validation of our novel dynamic toxicokinetic model, which includes the transfer of contaminants from the mother cows to their suckling calf and the uptake of soil by grazing cattle...
September 6, 2017: Environmental Science & Technology
keyword
keyword
37548
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"