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https://www.readbyqxmd.com/read/28647231/simultaneous-elimination-of-cyanotoxins-and-pcbs-via-mechanical-collection-of-cyanobacterial-blooms-an-application-of-green-bioadsorption-concept
#1
Wei Chen, Yunlu Jia, Anyue Liu, Qichao Zhou, Lirong Song
In this study, the distribution, transfer and fate of both polychlorinated biphenyls (PCBs) and cyanotoxins via phytoplankton routes were systematically investigated in two Chinese lakes. Results indicated that PCB adsorption/bioaccumulation dynamics has significantly positive correlations with the biomass of green alga and diatoms. Total lipid content of phytoplankton is the major factor that influences PCB adsorption/bioaccumulation. Cyanobacterial blooms with relatively lower lipid content could also absorb high amount of PCBs due to their high cell density in the water columns, and this process was proposed as major route for the transfer of PCBs in Chinese eutrophic freshwater...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646779/polychlorinated-biphenyls-in-the-surrounding-of-an-e-waste-recycling-facility-in-north-rhine-westphalia-levels-in-plants-and-dusts-spatial-distribution-homologue-pattern-and-source-identification-using-the-combination-of-plants-and-wind-direction-data
#2
Marcel Klees, Katja Hombrecher, Dieter Gladtke
During this study the occurrence of polychlorinated biphenyls (PCBs) in the surrounding of an e-waste recycling facility in North-Rhine Westphalia was analysed. PCB levels were analysed in curly kale, spruce needles, street dusts and dusts. Conspicuously high PCB concentrations in curly kale and spruce needles were found directly northwards of the industrial premises. Furthermore a concentration gradient originating from the industrial premises to the residential areas in direction southwest to northeast was evident...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28646765/historical-record-of-polychlorinated-biphenyls-pcbs-and-special-occurrence-of-pcb-209-in-a-shallow-fresh-water-lake-from-eastern-china
#3
Shouliang Huo, Chaocan Li, Beidou Xi, Zhiqiang Yu, Kevin M Yeager, Fengchang Wu
Concentrations of polychlorinated biphenyls (PCBs) were measured in dated sediment cores collected from the fifth largest freshwater lake in China, Lake Chaohu, to investigate PCB temporal trends, accumulation, and environmental fate. Total PCB concentrations in Lake Choahu sediments ranged from 0.03 to 24.11 ng g(-1) (d.w.). PCB 209 was the dominant congener, accounting for 45.5%-83.9% of total PCBs detected after the mid-20th century. All PCB congeners were positively correlated with total organic carbon (TOC) concentrations...
June 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28646397/concentrations-of-environmental-chemicals-in-urine-and-blood-samples-of-children-from-san-luis-potos%C3%A3-mexico
#4
Ivan N Perez-Maldonado, Angeles C Ochoa-Martinez, Sandra T Orta-Garcia, Tania Ruiz-Vera, Jose A Varela-Silva
Human biomonitoring (HBM) is an appreciated tool used to evaluate human exposure to environmental, occupational or lifestyle chemicals. Therefore, the aim of this study was to evaluate the exposure levels for environmental chemicals in urine and blood samples of children from San Luis Potosí, Mexico (SLP). This study identifies environmental chemicals of concern such as: arsenic (45.0 ± 15.0 µg/g creatinine), lead (5.40 ± 2.80 µg/dL), t,t-muconic acid (266 ± 220 µg/g creatinine), 1-hydroxypyrene (0...
June 23, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28639323/molecular-interactions-of-dioxins-and-dlcs-with-the-xenosensors-pxr-and-car-an-in-silico-risk-assessment-approach
#5
Garima Verma, Mohemmed Faraz Khan, Mohammad Shaquiquzzaman, Wasim Akhtar, Mymoona Akhter, Syed Misbahul Hasan, Mohammad Mumtaz Alam
Dioxins and dioxin-like compounds (DLCs) are known to cause endocrine disruption in humans and animals. Being lipophilic xenobiotic chemicals, they can be easily absorbed into the biological system from the surrounding environments, thereby causing various health dysfunctions. In the present study, a total of 100 dioxins and DLCs were taken, and their binding pattern was assessed with the xenosensors pregnane X receptor (PXR) and constitutive androstane receptor (CAR) in comparison with the corresponding known inhibitors and a well-studied endocrine disrupting xenobiotic, bisphenol A (BPA)...
June 22, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28639016/accumulation-properties-of-polychlorinated-biphenyl-congeners-in-yusho-patients-and-prediction-of-their-cytochrome-p450-dependent-metabolism-by-in-silico-analysis
#6
Shusaku Hirakawa, Takashi Miyawaki, Tsuguhide Hori, Jumboku Kajiwara, Susumu Katsuki, Masashi Hirano, Yuka Yoshinouchi, Hisato Iwata, Chikage Mitoma, Masutaka Furue
In what has become known as the Yusho incident, thousands of people in western Japan were poisoned by the accidental ingestion of rice bran oil contaminated with polychlorinated biphenyls (PCBs) and various dioxins and dioxin-like compounds. In this study, we investigated the accumulation patterns of 69 PCB congeners in the blood of Yusho patients in comparison with those of non-exposed controls. The blood samples were collected at medical check-ups in 2004 and 2005. To compare the patterns of PCB congeners, we calculated the concentration ratio of each congener relative to the 2,2',4,4',5,5'-hexaCB (CB153) concentration...
June 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634910/the-complex-biology-of-the-aryl-hydrocarbon-receptor-and-its-role-in-the-pituitary-gland
#7
REVIEW
Robert Formosa, Josanne Vassallo
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor best known for its ability to mediate the effects of environmental toxins such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD or dioxin), polycyclic aromatic hydrocarbons (PAHs), benzene, and polychlorinated biphenyls (PCBs) through the initiation of transcription of a number of metabolically active enzymes. Therefore, the AHR has been studied mostly in the context of xenobiotic signaling. However, several studies have shown that the AHR is constitutively active and plays an important role in general cell physiology, independently of its activity as a xenobiotic receptor and in the absence of exogenous ligands...
June 20, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28634112/concentrations-of-environmental-organic-contaminants-in-meat-and-meat-products-and-human-dietary-exposure-a-review
#8
REVIEW
José L Domingo
Meat and meat products is one of the most relevant food groups in an important number of human diets. Recently, the IARC, based on results of a number of epidemiological studies, classified the consumptions of red meat and processed meat as "probably carcinogenic to humans" and as "carcinogenic to humans", respectively. It was suggested that the substances responsible of the potential carcinogenicity would be mainly generated during meat processing, such as curing and smoking, or when meat is heated at high temperatures...
June 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28632453/survey-of-polychlorinated-dibenzo-p-dioxins-polychlorinated-dibenzofurans-and-non-ortho-polychlorinated-biphenyls-in-u-s-meat-and-poultry-from-2012-2013-toxic-equivalency-levels-patterns-temporal-trends-and-implications
#9
Sara J Lupton, Margaret O'Keefe, Jorge G Muñiz-Ortiz, Nelson Clinch, Pat Basu
The U.S. Department of Agriculture (USDA) conducts a statistically-based survey of the domestic meat supply (beef, pork, chicken, and turkey) to determine current levels of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and non-ortho-polychlorinated biphenyls (no-PCBs) every five years. Fat samples for each slaughter class were collected from U.S. federally licensed slaughter facilities. The samples were processed and analyzed for 17 PCDD/Fs and 3 no-PCBs. The sum of PCDD, PCDF, and no-PCB toxic equivalencies (sum-TEQ) calculated using 2005 toxic equivalency factors for all slaughter classes, ranged from non-detect (nd) to 6...
June 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28631552/effect-of-2-3-4-4-5-pentachlorobiphenyl-exposure-on-endometrial-receptivity-and-the-methylation-of-hoxa10
#10
Xin-Lan Qu, Ming-Zhang, Yuan-Fang, Hui Wang, Yuan-Zhen Zhang
Polychlorinated biphenyls (PCBs) are one of the most common endocrine-disrupting chemicals and have obvious toxicity on human reproductive development. The aim of our study was to investigate the toxicity of chronic 2,3',4,4',5-pentachlorobiphenyl (PCB 118) exposure on embryo implantation and endometrial receptivity, with the possible mechanism of DNA methylation involved. Virgin CD-1 female mice (3 weeks old) were housed and orally treated with PCB 118 (0, 1, 10, 100 μg/kg) for a month. After mating with fertile males, the pregnant mice were killed on gestation day 4...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28624947/physiological-and-molecular-responses-of-the-earthworm-eisenia-fetida-to-polychlorinated-biphenyl-contamination-in-soil
#11
Xiaochen Duan, Xiuyong Fu, Jing Song, Huixin Li, Mingming Sun, Feng Hu, Li Xu, Jiaguo Jiao
Polychlorinated biphenyls (PCBs) are a class of man-made organic compounds ubiquitously present in the biosphere. In this study, we evaluated the toxic effects of different concentrations of PCBs in two natural soils (i.e. red soil and fluvo-aquic soil) on the earthworm Eisenia fetida. The parameters investigated included anti-oxidative response, genotoxic potential, weight variation and biochemical responses of the earthworm exposed to two different types of soils spiked with PCBs after 7 or 14 days of exposure...
June 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28623747/results-of-a-national-survey-of-high-frequency-fish-consumers-in-the-united-states
#12
Katherine von Stackelberg, Miling Li, Elsie Sunderland
Exposure to contaminants in fish may be associated with adverse health outcomes even as fish consumption is generally considered beneficial. Risk assessments conducted to support regulatory analyses rely on quantitative fish consumption estimates. Here we report the results of a national survey of high-frequency fish consumers (n = 2099) based on a survey population statistically representative of ~17.6 million U.S. individuals consuming three or more fish meals per week. The survey was conducted during 2013 using an on-line survey instrument...
June 14, 2017: Environmental Research
https://www.readbyqxmd.com/read/28621543/estimating-particulate-exposure-from-modern-municipal-waste-incinerators-in-great-britain
#13
Philippa Douglas, Anna Freni-Sterrantino, Maria Leal Sanchez, Danielle C Ashworth, Rebecca E Ghosh, Daniela Fecht, Anna Font, Marta Blangiardo, John Gulliver, Mireille B Toledano, Paul Elliott, Kees de Hoogh, Gary W Fuller, Anna L Hansell
Municipal Waste Incineration (MWI) is regulated through the European Union Directive on Industrial Emissions (IED), but there is ongoing public concern regarding potential hazards to health. Using dispersion modeling, we estimated spatial variability in PM10 concentrations arising from MWIs at postcodes (average 12 households) within 10 km of MWIs in Great Britain (GB) in 2003-2010. We also investigated change points in PM10 emissions in relation to introduction of EU Waste Incineration Directive (EU-WID) (subsequently transposed into IED) and correlations of PM10 with SO2, NOx, heavy metals, polychlorinated dibenzo-p-dioxins/furan (PCDD/F), polycyclic aromatic hydrocarbon (PAH) and polychlorinated biphenyl (PCB) emissions...
June 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28620612/potential-role-of-pet-cats-as-a-sentinel-species-for-human-exposure-to-flame-retardants
#14
Luis A Henríquez-Hernández, Elena Carretón, María Camacho, José Alberto Montoya-Alonso, Luis D Boada, Verónica Bernal Martín, Yaiza Falcón Cordón, Soraya Falcón Cordón, Manuel Zumbado, Octavio P Luzardo
Flame retardants are a wide group of chemicals used by the industry to avoid combustion of materials. These substances are commonly found in plastics, electronic equipment, fabrics, and in many other everyday articles. Subsequently, ubiquitous environmental contamination by these common chemical is frequently reported. In the present study, we have evaluated the level of exposure to polychlorinated biphenyls (PCBs), brominated diphenyl ethers (BDEs), and organophosphorous flame retardants (OPFRs) in pet cats through the analysis of their serum...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28610584/serum-levels-of-environmental-pollutants-is-a-risk-factor-for-breast-cancer-in-inuit-a-case-control-study
#15
Maria Wielsøe, Peder Kern, Eva Cecilie Bonefeld-Jørgensen
BACKGROUND: Environmental Persistent Organic Pollutants (POPs) can alter the hormone homeostasis by mimicking, interfering or blocking the function of hormones; moreover POPs are hypothesized to modify the risk of breast cancer. The association between POPs and breast cancer has been widely studied but the conclusions are inconsistent. The present study examined the associations between serum levels of POPs and breast cancer with focus on the highly exposed Greenlandic Inuit population...
June 13, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28609223/the-influence-of-multiple-chemical-and-non-chemical-stressors-on-benthic-communities-in-a-mid-west-agricultural-stream
#16
Lenwood W Hall, Willian D Killen, Ronald D Anderson, Raymond W Alden
The objective of this 3-year study was to characterize benthic communities and physical habitat in an agricultural stream in the mid-west area of the United States (Big Bureau Creek, Illinois). Concurrent basic water quality parameters and seven nutrients were measured in the water column. Sediment measurements from depositional areas were conducted for bifenthrin, Total Organic Carbon, grain size, polychlorinated biphenyls (PCBs) and eight metals. All parameters were measured at 12 sites annually during the late summer for a 3-year period (2014, 2015 and 2016)...
June 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28605706/comparing-polyethylene-and-polyoxymethylene-passive-samplers-for-measuring-sediment-porewater-concentrations-of-polychlorinated-biphenyls-mutual-validation-and-possible-correction-by-polymer-polymer-partition-experiment
#17
Satoshi Endo, Yoshinori Yabuki, Shuhei Tanaka
Two sediment passive samplers, polyethylene (PE) and polyoxymethylene (POM), were compared and mutually validated for measuring freely dissolved concentrations (Cfree) of polychlorinated biphenyls (PCBs) in sediment porewater. PE and POM strips in commonly used dimensions (30 and 76 μm in thickness, respectively) were exposed to sediment slurries for 28 d. The Cfree values calculated using literature polymer-water partition coefficients were consistently higher for PE than for POM by a factor of 2 on average...
June 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28605185/soft-matter-printed-circuit-board-with-uv-laser-micropatterning
#18
Tong Lu, Eric Markvicka, Yichu Jin, Carmel Majidi
When encapsulated in elastomer, micropatterned traces of Ga-based liquid metal (LM) can function as elastically deformable circuit wiring that provides mechanically robust electrical connectivity between solid state elements (e.g. transistors, processors, sensor nodes). However, LM-microelectronics integration is currently limited by challenges in rapid fabrication of LM circuits and the creation of vias between circuit terminals and the I/O pins of packaged electronics. In this study we address both with a unique layup for soft-matter electronics in which traces of liquid-phase Ga-In eutectic (EGaIn) are patterned with UV laser micromachining (UVLM)...
June 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28602678/combination-of-polycyclic-aromatic-hydrocarbons-and-temperature-exposure-in%C3%A2-vitro-effects-on-immune-response-of-european-clam-ruditapes-decussatus
#19
Chalbia Mansour, Francisco Antonio Guardiola, María Ángeles Esteban, Dalila Saidane Mosbahi
Marine organisms are subjected to various biotic and abiotic factors such as changes of temperature and pollutants [e.g. polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and heavy metals, which may affect their defense mechanisms. In this context, the aim was to evaluate the combined effects of temperature (20 and 30 °C) and PAHs (fluorene, phenanthrene and pyrene) at two concentrations (10(-5) and 10(-3) mg mL(-1)) on the immune responses of the European clam Ruditapes decussatus were after 24 h of in vitro exposure...
June 5, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28602421/endocrine-disruption-effects-in-male-and-intersex-roach-rutilus-rutilus-l-from-french-rivers-an-integrative-approach-based-on-subcellular-to-individual-responses
#20
Perrine Geraudie, Marie Gerbron, Christophe Minier
Among the chemicals found in the aquatic environment, some have been reported to interact with the endocrine system of organisms and have been identified as endocrine disrupting compounds. In this study, we have assessed the biological effects due to environmental estrogenic compounds in adult male roach (Rutilus rutilus). Wild fish were collected in the Seine river, and one of its affluent, the Epte river in Normandy, France and impacts on endocrine and reproductive functions have been assessed. This study provides innovative data on the intersex condition in wild fish that are crucial to understand estrogenic contamination impacts and maintenance of sustainable fish population...
June 5, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
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