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https://www.readbyqxmd.com/read/29783084/organochlorine-pesticides-ocps-and-polychlorinated-biphenyls-pcbs-in-cyprinidae-fish-towards-hints-of-their-arrangements-using-advanced-classification-methods
#1
Snježana Herceg Romanić, Gordana Vuković, Darija Klinčić, Marijana Matek Sarić, Ivan Župan, Davor Antanasijević, Aleksandar Popović
To tackle the ever-present global concern regarding human exposure to persistent organic pollutants (POPs) via food products, this study strived to indicate associations between organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in lake-fish tissue depending on the species and sampling season. Apart from the monitoring initiatives recommended in the Global Monitoring Plan for POPs, the study discussed 7 OCPs and 18 PCB congeners determined in three Cyprinidae species (rudd, carp, and Prussian carp) from Vransko Lake (Croatia), which are widely domesticated and reared as food fish across Europe and Asia...
May 18, 2018: Environmental Research
https://www.readbyqxmd.com/read/29778940/pcbs-and-organochlorine-pesticides-in-indoor-environments-a-comparison-of-indoor-contamination-in-canada-and-czech-republic
#2
Ondrej Audy, Lisa Melymuk, Marta Venier, Simon Vojta, Jitka Becanova, Kevin Romanak, Martina Vykoukalova, Roman Prokes, Petr Kukucka, Miriam L Diamond, Jana Klanova
Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are restricted compounds that are ubiquitously detected in the environment, including indoor matrices such as air and residential dust. We report concentrations of PCBs and selected OCPs in indoor air and dust from homes in Canada (23 homes) and Czech Republic (20 homes). Indoor air concentrations of PCBs and OCPs were ∼10 times higher than that outdoors. PCB concentrations of ∼450 ng/m3 were similar in both countries, higher in homes built before the restrictions on PCBs, and had congener profiles consistent with PCB mixtures manufactured or used in each country...
May 3, 2018: Chemosphere
https://www.readbyqxmd.com/read/29777312/evaluating-organochlorine-pesticide-residues-in-the-aquatic-environment-of-the-lake-naivasha-river-basin-using-passive-sampling-techniques
#3
Yasser Abbasi, Chris M Mannaerts
Passive sampling techniques can improve the discovery of low concentrations by continuous collecting the contaminants, which usually go undetected with classic and once-off time-point grab sampling. The aim of this study was to evaluate organochlorine pesticide (OCP) residues in the aquatic environment of the Lake Naivasha river basin (Kenya) using passive sampling techniques. Silicone rubber sheet and Speedisk samplers were used to detect residues of α-HCH, β-HCH, γ-HCH, δ-HCH, heptachlor, aldrin, heptachlor epoxide, pp-DDE, endrin, dieldrin, α-endosulfan, β-endosulfan, pp-DDD, endrin aldehyde, pp-DDT, endosulfan sulfate, and methoxychlor in the Malewa River and Lake Naivasha...
May 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29775944/alterations-of-cytochrome-p450-and-the-occurrence-of-persistent-organic-pollutants-in-tilapia-caged-in-the-reservoirs-of-the-igua%C3%A3-u-river
#4
F Y Yamamoto, G D Diamante, M S Santana, D R Santos, R Bombardeli, C C Martins, C A Oliveira Ribeiro, D Schlenk
Environmental chemicals originating from human activities, such as persistent organic pollutants (POPs), may interfere with the endocrine system of aquatic organisms. The effect of these chemicals on biota and human populations is of high public concern but remains poorly understood, especially in aquatic environments of South America. The aim of this study was to investigate the bioavailability of POPs and the related effects in caged male tilapia (Oreochromis niloticus) in four cascading reservoirs of the Iguaçu River, Southern Brazil...
May 15, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29771504/revisiting-the-contributions-of-far-and-near-field-routes-to-aggregate-human-exposure-to-polychlorinated-biphenyls-pcbs
#5
Li Li, Jon Arnot, Frank Wania
The general population is exposed to polychlorinated biphenyls (PCBs) by both consuming food from far-field contaminated agricultural and aquatic environments, and inhalation and non-dietary ingestion in near-field indoor or residential environments. Here, we seek to evaluate the relative importance of far- and near-field routes by simulating the time-variant aggregate exposure of Swedish females to PCB congeners from 1930 to 2030. We rely on a mechanistic model, which integrates a food-chain bioaccumulation module and a human toxicokinetic module with dynamic substance flow analysis and nested indoor-urban-rural environmental fate modeling...
May 17, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29764339/determination-of-plasma-concentrations-of-organochlorine-pesticides-and-polychlorinated-biphenyls-in-pet-cats-and-dogs
#6
Oguzhan Yavuz, Handan Hilal Arslan, Cagatay Esin, Yavuz Kursad Das, Abdurrahman Aksoy
The aim of this study was the determination of plasma concentrations of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in cats and dogs and evaluation of their prevalence and possible effects. The concentrations of nine OCPs, such as α-hexachlorocyclohexane (HCH), β-HCH, γ-HCH, hexachlorobenzene (HCB), aldrin, 2,4'-dichlorodiphenyltrichloroethane (2,4'-DDT), 4,4'-DDT, 2,4'-dichlorodiphenyldichloroethylene (2,4'-DDE) and 4,4'-DDE and 16 PCBs (PCB-28, -52, -70, -74, -81, -99, -101, -118, -138, -153, -156, -170, -180, -183, -187 and -208) were evaluated in the plasma samples of pet cats ( n = 15) and dogs ( n = 21)...
January 1, 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29763869/exposure-of-dioxin-like-chemicals-in-participants-of-the-anniston-community-health-survey-follow-up
#7
Eric Yang, Marian Pavuk, Andreas Sjödin, Michael Lewin, Richard Jones, Jim Olson, Linda Birnbaum
The 2014 follow-up of the Anniston Community Health Survey (ACHS II) consisted of 338 surviving participants from the 2005-2007 baseline study (ACHS) who had previous polychlorinated biphenyl (PCB) measurements, were not pregnant, and were not institutionalized. Questionnaires and blood samples provided the demographic, personal history, and chemical concentration data of the Anniston residents. Approximately 51% of participants were African American, 72% were female, and the mean age was 63 years old. The objectives of this study were to provide an exposure assessment of dioxin-like chemicals in the ACHS II participants and compare the measurements with the general United States (U...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29761478/pain-relief-for-women-undergoing-oocyte-retrieval-for-assisted-reproduction
#8
REVIEW
Irene Kwan, Rui Wang, Emily Pearce, Siladitya Bhattacharya
BACKGROUND: Various methods of conscious sedation and analgesia (CSA) have been used during oocyte retrieval for assisted reproduction. The choice of agent has been influenced by the quality of sedation and analgesia and by concerns about possible detrimental effects on reproductive outcomes. OBJECTIVES: To assess the effectiveness and safety of different methods of conscious sedation and analgesia for pain relief and pregnancy outcomes in women undergoing transvaginal oocyte retrieval...
May 15, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29757996/design-of-a-low-power-small-area-aec-q100-compliant-sent-transmitter-in-signal-conditioning-ic-for-automotive-pressure-and-temperature-complex-sensors-in-180-nm-cmos-technology
#9
Imran Ali, Behnam Samadpoor Rikhan, Dong-Gyu Kim, Dong-Soo Lee, Muhammad Riaz Ur Rehman, Hamed Abbasizadeh, Muhammad Asif, Minjae Lee, Keum Cheol Hwang, Youngoo Yang, Kang-Yoon Lee
In this paper, a low-power and small-area Single Edge Nibble Transmission (SENT) transmitter design is proposed for automotive pressure and temperature complex sensor applications. To reduce the cost and size of the hardware, the pressure and temperature information is processed with a single integrated circuit (IC) and transmitted at the same time to the electronic control unit (ECU) through SENT. Due to its digital nature, it is immune to noise, has reduced sensitivity to electromagnetic interference (EMI), and generates low EMI...
May 14, 2018: Sensors
https://www.readbyqxmd.com/read/29754088/sampling-of-suspended-particulate-matter-using-particle-traps-in-the-rh%C3%A3-ne-river-relevance-and-representativeness-for-the-monitoring-of-contaminants
#10
M Masson, H Angot, C Le Bescond, M Launay, A Dabrin, C Miège, J Le Coz, M Coquery
Monitoring hydrophobic contaminants in surface freshwaters requires measuring contaminant concentrations in the particulate fraction (sediment or suspended particulate matter, SPM) of the water column. Particle traps (PTs) have been recently developed to sample SPM as cost-efficient, easy to operate and time-integrative tools. But the representativeness of SPM collected with PTs is not fully understood, notably in terms of grain size distribution and particulate organic carbon (POC) content, which could both skew particulate contaminant concentrations...
May 10, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29753250/levels-and-risk-assessment-of-hydrocarbons-and-organochlorines-in-aerosols-from-a-north-african-coastal-city-bizerte-tunisia
#11
Badreddine Barhoumi, Javier Castro-Jiménez, Catherine Guigue, Madeleine Goutx, Richard Sempéré, Abdelkader Derouiche, Amani Achour, Soufiane Touil, Mohamed Ridha Driss, Marc Tedetti
The aim of this study was to assess, for the first time, the concentrations, sources, dry deposition and human health risks of polycyclic aromatic hydrocarbons (PAHs), aliphatic hydrocarbons (AHs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in total suspended particle (TSP) samples collected in Bizerte city, Tunisia (North Africa), during one year (March 2015-January 2016). Concentrations of PAHs, AHs, PCBs and OCPs ranged 0.5-17.8 ng m-3 , 6.7-126.5 ng m-3 , 0.3-11 pg m-3 and 0...
May 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29751429/association-of-prenatal-exposure-to-pcdd-fs-and-pcbs-with-maternal-and-infant-thyroid-hormones-the-hokkaido-study-on-environment-and-children-s-health
#12
Toshiaki Baba, Sachiko Ito, Motoyuki Yuasa, Eiji Yoshioka, Chihiro Miyashita, Atsuko Araki, Seiko Sasaki, Sumitaka Kobayashi, Jumboku Kajiwara, Tsuguhide Hori, Shizue Kato, Reiko Kishi
Polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs) and biphenyls (PCBs) are persistent organic pollutants that are universally detected. Some congeners of PCDDs, PCDFs or PCBs have dioxin-like toxicity, whereas non-dioxin-like PCBs are considered to have different toxicity. Reports of the relationships between prenatal exposure to PCDDs, PCDFs or PCBs and thyroid homeostasis in pregnant women and infants have been inconsistent. The aim of this study was to investigate the effect of maternal serum PCDD/F or PCB levels on maternal and neonatal thyroid hormone (TH) levels in a prospective cohort...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29744915/using-performance-reference-compounds-to-compare-mass-transfer-calibration-methodologies-in-passive-samplers-deployed-in-the-water-column
#13
Abigail S Joyce, Robert M Burgess
Performance reference compounds (PRCs) are often added to passive samplers prior to field deployments to provide information about mass transfer kinetics between the sampled environment and the passive sampler. Their popularity has resulted in different methods of varying complexity to estimate mass transfer and better estimate freely dissolved concentrations (Cfree ) of targeted compounds. Three methods for describing a mass transfer model are commonly used: a first order (FO) kinetic method, a non-linear least squares (NLS) fitting of sampling rate, and a diffusion (DIF) method...
May 10, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29742474/environmental-behaviour-of-polychlorinated-biphenyls-in-a-paddy-field-impact-factors-and-canopy-effects
#14
Qilu Li, Kong Yang, Yan Wang, Biao Jin, Chunling Luo, Jun Li, Gan Zhang
Paddy fields play an important role in the transport of persistent organic pollutants (POPs) due to the filter effects of canopy and their wide distribution. Thus, most studies have been focusing on the filter effects of canopy for POPs. However, shielding effects of canopy might also influence transport and portion of POPs between top and bottom. To investigate these two important processes, our study involved 30 polychlorinated biphenyls (PCBs) in a paddy field. Samples of bulk depositions, surface water, and air were taken to investigate the occurrence and the behaviour of PCBs...
May 6, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29740459/3d-structures-of-plant-phytochrome-a-as-pr-and-pfr-from-solid-state-nmr-implications-for-molecular-function
#15
Chen Song, Maria Andrea Mroginski, Christina Lang, Jakub Kopycki, Wolfgang Gärtner, Jörg Matysik, Jon Hughes
We present structural information for oat phyA3 in the far-red-light-absorbing (Pfr) signaling state, to our knowledge the first three-dimensional (3D) information for a plant phytochrome as Pfr. Solid-state magic-angle spinning (MAS) NMR was used to detect interatomic contacts in the complete photosensory module [residues 1-595, including the NTE (N-terminal extension), PAS ( P er/ A rnt/ S im), GAF (c G MP phosphodiesterase/ a denylyl cyclase/ F hlA) and PHY ( phy tochrome-specific) domains but with the C-terminal PAS repeat and transmitter-like module deleted] auto-assembled in vitro with 13 C- and 15 N-labeled phycocyanobilin (PCB) chromophore...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29738842/relative-effective-potencies-of-dioxin-like-compounds-in-rodent-and-human-lung-cell-models
#16
Simona Strapáčová, Petra Brenerová, Pavel Krčmář, Patrik Andersson, Karin I van Ede, Majorie B M van Duursen, Martin van den Berg, Jan Vondráček, Miroslav Machala
Toxicity of dioxin-like compounds (DLCs), such as polychlorinated dibenzo-p-dioxins, dibenzofurans and biphenyls, is largely mediated via aryl hydrocarbon receptor (AhR) activation. AhR-mediated gene expression can be tissue-specific; however, the inducibility of AhR in the lungs, a major target of DLCs, remains poorly characterized. In this study, we developed relative effective potencies (REPs) for a series of DLCs in both rodent (MLE-12, RLE-6TN) and human (A549, BEAS-2B) lung and bronchial epithelial cell models, using expression of both canonical (CYP1A1, CYP1B1) and less well characterized (TIPARP, AHRR, ALDH3A1) AhR target genes...
May 5, 2018: Toxicology
https://www.readbyqxmd.com/read/29734078/determination-of-the-partition-coefficient-between-dissolved-organic-carbon-and-seawater-using-differential-equilibrium-kinetics
#17
Du Yung Kim, Jung-Hwan Kwon
Because the freely dissolved fraction of highly hydrophobic organic chemicals is bioavailable, knowing the partition coefficient between dissolved organic carbon and water (KDOCw ) is crucial to estimate the freely dissolved fraction from the total concentration. A kinetic method was developed to obtain KDOCw that required a shorter experimental time than equilibrium methods. The equilibrium partition coefficients of four polychlorinated biphenyls (PCBs) (2,4,4'-trichlorobiphenyl (PCB 28), 2,2',3,5'-tetrachlorobiphenyl (PCB 44), 2,2',4,5,5'-pentachlorobiphenyl (PCB 101), and 2,2',4,4',5,5'-hexachlorobiphenyl (PCB 153)) between dissolved organic carbon and seawater (KDOCsw ) were determined using seawater samples from the Korean coast...
May 4, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29727832/identification-of-biphenyl-metabolising-microbes-in-activated-biosludge-using-cultivation-independent-and-dependent-approaches
#18
Mengke Song, Longfei Jiang, Dayi Zhang, Chunling Luo, Hua Yin, Yongtao Li, Gan Zhang
Microbes have important roles in removing organic pollutants in wastewater treatment plants (WWTPs), especially in mineralising recalcitrant persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs). However, the majority of the microorganisms that metabolise these pollutants in situ remain elusive owing to barriers of traditional techniques in unravel yet-to-be-cultivated microbes. In this study, DNA stable-isotope probing (SIP) coupled with high-throughput sequencing was applied to identify the microbes responsible for PCB degradation in the activated biosludge of a WWTP using 13 C-labelled biphenyl (BP)...
April 16, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29727754/genomic-instability-in-adult-men-involved-in-processing-electronic-waste-in-northern-china
#19
Yan Wang, Xiaohui Sun, Lianying Fang, Keqiu Li, Ping Yang, Liqing Du, Kaihua Ji, Jinhan Wang, Qiang Liu, Chang Xu, Guang Li, John P Giesy, Markus Hecker
BACKGROUND: Managing and recycling electronic waste (e-waste), while useful and necessary, has resulted in significant contamination of several environments in China. The area around Tianjin, China has become one of the world's largest e-waste disposal centers, where electronics are processed by manually disassembly or burning, which can result in serious exposure of workers to a multitude of toxicants. OBJECTIVE: The present study assessed potential genomic damage in workers involved in recycling e-waste...
May 1, 2018: Environment International
https://www.readbyqxmd.com/read/29727753/towards-a-systematic-understanding-of-the-dynamic-fate-of-polychlorinated-biphenyls-in-indoor-urban-and-rural-environments
#20
Li Li, Jon A Arnot, Frank Wania
Indoor environments and urban areas are hubs of chemical stocks and emissions, which contaminate those indoor and urban areas as well as the surrounding rural areas. Here, we introduce a newly developed nested multimedia indoor-urban-rural chemical fate model, coupled with a substance flow analysis, aiming to provide an integrated and dynamic understanding of the mass distribution, concentrations, and major pathways of contaminants within and between indoor, urban and rural environments. The model is applied to simulate the emissions, transport and fate of polychlorinated biphenyl (PCB) congeners 28 and 153 in the Western Baltic drainage basin over time...
May 1, 2018: Environment International
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