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https://www.readbyqxmd.com/read/28525872/levels-and-temporal-trends-of-organochlorine-contaminants-in-mussels-from-spanish-mediterranean-waters
#1
Juan A Campillo, Beatriz Fernández, Víctor García, José Benedicto, Víctor M León
The levels and trends of organochlorine contaminants were determined along the Spanish Mediterranean coast from 2000 to 2013 using mussel, Mytilus galloprovincialis, as bioindicator species. The highest levels of PCBs and DDTs were found at industrial and urban locations, and at areas under the influence of the mouth of major rivers. Dieldrin and t-NNC were commonly detected, while HCHs, aldrin, isodrin, endrin and HCB were at levels not detectable at many areas. Significant declines on the levels of DDTs were observed at most of the areas studied...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28463822/organochlorine-pesticides-and-polychlorinated-biphenyls-in-human-adipose-tissue-from-northern-tunisia-current-extent-of-contamination-and-contributions-of-socio-demographic-characteristics-and-dietary-habits
#2
Amani Achour, Abdelkader Derouiche, Badreddine Barhoumi, Badreddine Kort, Driss Cherif, Sondes Bouabdallah, Mohsen Sakly, Khémais Ben Rhouma, Soufiane Touil, Mohamed Ridha Driss, Olfa Tebourbi
The aims of the present study were to investigate the current exposure levels of persistent organochlorine compounds (OCs) in adipose tissues intraoperatively collected from 40 patients over 20 years undergoing non-cancer-related surgery residing in Northern region of Tunisia (Bizerte), which constitutes an exemplary case, and examined association between levels of contamination and both socio-demographic characteristics and dietary habits. Concentration of hexachlorobenzene (HCB), hexachlorocyclohexane isomers (α-HCH, β-HCH, γ-HCH and δ-HCH), dichlorodiphenyltrichloroethane isomers (p,p'-DDT and o,p'-DDT) and metabolites (p,p'-DDE, o,p'-DDE, p,p'-DDD and o,p'-DDD) and 12 polychlorinated biphenyls (PCBs) congeners were measured using capillary gas chromatography with electron capture detector...
April 27, 2017: Environmental Research
https://www.readbyqxmd.com/read/28456845/in-focus-in-hcb
#3
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
April 29, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28438788/associations-between-persistent-organic-pollutants-type-2-diabetes-diabetic-nephropathy-and-mortality
#4
Brian A Grice, Robert G Nelson, Desmond E Williams, William C Knowler, Clinton Mason, Robert L Hanson, Kai McKeever Bullard, Meda E Pavkov
OBJECTIVE: Relationships were examined between persistent organic pollutants (POPs) and incident type 2 diabetes, end-stage renal disease (ESRD) and mortality. METHODS: In a nested case-control study, 300 persons without diabetes had baseline examinations between 1969 and 1974; 149 developed diabetes (cases) and 151 remained non-diabetic (controls) during 8.0 and 23.1 years of follow-up, respectively. POPs were measured at baseline. ORs for diabetes were computed by logistic regression analysis...
April 24, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28421253/levels-and-sources-of-organochlorine-pesticides-in-surface-sediment-from-anhui-reach-of-huaihe-river-china
#5
Chunnian Da, Ke Wu, Jie Jin, Minjun Yu
Twenty-two organochlorine pesticides (OCPs) were investigated in Anhui reach of Huaihe river, China. Seventeen out of 22 OCPs were detected by GC-MS. The mean concentrations of OCPs followed the order: HCHs > DDTs > HCB > chlordanes > endosulfans. Levels of total HCHs and total DDTs ranged from 2.54 to 13.91 ng g(-1) (mean = 7.52 ng g(-1)) and 0.016 to 2.54 ng g(-1) (mean = 0.45 ng g(-1)), respectively. The concentrations of DDTs were lower than those of HCHs. Compared with the other rivers in China, DDTs and HCHs were relatively lower or similar...
June 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28414931/human-adipose-tissue-levels-of-persistent-organic-pollutants-and-metabolic-syndrome-components-combining-a-cross-sectional-with-a-10-year-longitudinal-study-using-a-multi-pollutant-approach
#6
Vicente Mustieles, Mariana F Fernández, Piedad Martin-Olmedo, Beatriz González-Alzaga, Andrés Fontalba-Navas, Russ Hauser, Nicolás Olea, Juan P Arrebola
We aimed to assess the influence of long-term exposure to POPs on the risk of metabolic syndrome, combining a cross-sectional with a 10-year longitudinal follow-up design. Residues of eight POPs were quantified in adipose tissue samples from 387 participants recruited between 2003 and 2004 in Granada province (Spain). The outcome ("metabolically compromised") was defined as having ≥1 diagnosis of type 2 diabetes, hypertension, hypertriglyceridemia, and/or low HDL cholesterol. The cross-sectional analysis was conducted in the initial cohort, while the 10-year longitudinal analysis was conducted in those 154 participants free of any of the so-mentioned metabolic diseases and classified as "metabolically healthy" at recruitment...
April 14, 2017: Environment International
https://www.readbyqxmd.com/read/28395858/association-between-exposure-to-organochlorine-compounds-and-maternal-thyroid-status-role-of-the-iodothyronine-deiodinase-1-gene
#7
Sabrina Llop, Mario Murcia, Mar Alvarez-Pedrerol, Joan O Grimalt, Loreto Santa-Marina, Jordi Julvez, Fernando Goñi-Irigoyen, Mercedes Espada, Ferran Ballester, Marisa Rebagliato, Maria-Jose Lopez-Espinosa
INTRODUCTION: Exposure to organochlorine compounds (OCs) may interfere with thyroid hormone (TH) homeostasis. The disruption of the deiodinase (DIO) enzymes has been proposed as a mechanism of action. AIM: To evaluate the association between exposure to OCs and TH status in pregnant women, as well as to explore the role of genetic variations in the DIO1 and DIO2 genes. METHODS: The study population (n=1128) was composed of pregnant women who participated in the INMA Project (Spain, 2003-2006)...
April 8, 2017: Environment International
https://www.readbyqxmd.com/read/28392239/organohalogenated-contaminants-in-plasma-and-eggs-of-rockhopper-penguins-does-vitellogenin-affect-maternal-transfer
#8
Nina Dehnhard, Veerle L B Jaspers, Laurent Demongin, Evi Van den Steen, Adrian Covaci, Rianne Pinxten, Glenn T Crossin, Petra Quillfeldt, Marcel Eens, Maud Poisbleau
Although many studies have investigated organohalogenated contaminants (OHCs) in yolk, little is known about the mechanisms and timing of transfer of OHCs from the female to the egg. Vitellogenin, a yolk precursor, has been suggested to play a role in this transport. We here report for the first time the temporal changes in OHC and an index of vitellogenin concentrations in female plasma from the pre-laying period to clutch completion in free-living birds: the southern rockhopper penguin (Eudyptes chrysocome chrysocome) breeding in the Falkland/Malvinas Islands...
April 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28391396/%C3%A2-in-focus-in-hcb
#9
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
April 8, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28384585/polyhalogenated-compounds-chlorinated-paraffins-novel-and-classic-flame-retardants-pops-in-dishcloths-after-their-regular-use-in-households
#10
Christoph Gallistl, Bianca Lok, Annika Schlienz, Walter Vetter
Dishcloths are routinely used in the clean-up process following daily kitchen activities and are thus subject to contamination commensurate with their frequent use. Here we analyzed dishcloths for the occurrence of polyhalogenated compounds after 14days of use in household kitchens. Analysis of 19 dishcloths revealed the presence of 29 polyhalogenated contaminants with total mean/median concentrations of 6,900/3,600ng/dishcloth, respectively. The spectrum featured classic and novel halogenated flame-retardants (HFRs) like polybrominated diphenyl ethers (PBDEs), hexabromocyclododecane (HBCD), decabromodiphenyl ethane (DBDPE), pentabromoethylbenzene (PBEB), chlordene plus and dechlorane plus, as well as typical chloropesticides and background contaminants (e...
October 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28382615/a-case-of-multiple-system-atrophy-with-preexisting-alzheimer-s-disease-and-predating-the-hot-cross-bun-sign
#11
Chi-Wei Lin, Chi-Yu Tseng, Chung-Ping Lo, Min-Chien Tu
PURPOSE: Synucleinopathy, tauopathy and amyloidopathy were classified as distinct clinical and pathological entities in traditional classification systems, and their interactions have been studied on neuropathology and molecular genetics recently. CASE REPORT: In this report, we present a 69-year-old male patient who had been diagnosed with probable Alzheimer's disease (AD) dementia due to progressive forgetfulness in February 2013. His Mini- Mental State Examination score was 21/30, and his Cognitive Abilities Screening Instrument score was 78/100, resulted from profound deficits in recent memory and abstract thinking domains...
December 15, 2016: Acta Neurologica Taiwanica
https://www.readbyqxmd.com/read/28371370/integrated-design-of-mno2-carbon-hollow-nanoboxes-to-synergistically-encapsulate-polysulfides-for-empowering-lithium-sulfur-batteries
#12
Sarish Rehman, Tianyu Tang, Zeeshan Ali, Xiaoxiao Huang, Yanglong Hou
Lithium sulfur batteries (LSBs) with high theoretical energy density are being pursued as highly promising next-generation large-scale energy storage devices. However, its launch into practical application is still shackled by various challenges. A rational nanostructure of hollow carbon nanoboxes filled with birnessite-type manganese oxide nanosheets (MnO2 @HCB) as a new class of molecularly-designed physical and chemical trap for lithium polysulfides (Li2 Sx (x = 4-8)) is reported. The bifunctional, integrated, hybrid nanoboxes overcome the obstacles of low sulfur loading, poor conductivity, and redox shuttle of LSBs via effective physical confinement and chemical interaction...
March 31, 2017: Small
https://www.readbyqxmd.com/read/28368688/organochlorine-pesticides-and-polychlorinated-biphenyls-in-sewage-sludge-from-egypt
#13
Assem O Barakat, Mohammed A Khairy, Mahmoud R Mahmoud
The purpose of this study was to determine the levels, distribution and toxicological potential of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in sewage sludge samples from several WWTPs in the Alexandria area, Egypt. The POPs of interest were 26 PCBs and 16 OCPs. Analyses were performed by gas chromatography with electron impact mass spectrometric detection in the selected ion monitoring mode (GC-MS-SIM) using deuterated organochlorines as internal standards. Total concentrations of OCPs and Σ7 PCBs (ICES) in sludge ranged from 44...
April 3, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28355053/experimental-study-on-the-role-of-sedimentation-and-degradation-processes-on-atmospheric-deposition-of-persistent-organic-pollutants-in-a-subtropical-water-column
#14
Yumei Huang, Ruijie Zhang, Kechang Li, Zhineng Cheng, Guangcai Zhong, Gan Zhang, Jun Li
The goal of this study is to experimentally assess the role of vertical sinking and degradation processes of persistent organic pollutants (POPs) in a subtropical water column. This was done by measuring the concentrations of selected typical organochlorine pesticides, including hexachlorocyclohexanes (HCHs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethanes (DDTs), trans-chlordane (TC), and cis-chlordane (CC), in atmosphere (gas phase), water (dissolved and particulate phases), and sedimentation samples simultaneously from October 2011 to April 2013 in a subtropical lake...
April 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28349741/organochlorine-pesticides-ocps-in-raft-mussels-coming-from-galician-r%C3%A3-as
#15
Nieves Carro, Isabel García, María Ignacio, Ana Mouteira
This survey gives an overview of the range of organochlorine pesticides (OCPs) α and γ-HCH (lindane), HCB, pp´-DDE, pp´-DDD, op´-DDT, pp´-DDT, aldrin, dieldrin, endrin, isodrin and trans-nonachlor in raft mussels cultivated in several polygons of the Galician Rías (Ares-Betanzos, Muros-Noia, Arousa, Pontevedra and Vigo) during the period 1998-2014. A significant number of OCPs were detected but the levels found were generally low, mainly in the recent samplings (2010-2014). The levels of ∑DDs (sum of DDTs and its metabolites, pp´-DDE and pp´-DDD) ranged between 0...
March 28, 2017: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/28342994/persistent-organic-pollutants-pops-in-the-atmosphere-of-coastal-areas-of-the-ross-sea-antarctica-indications-for-long-term-downward-trends
#16
Karla Pozo, Tania Martellini, Simonetta Corsolini, Tom Harner, Victor Estellano, Petr Kukučka, Marie D Mulder, Gerhard Lammel, Alessandra Cincinelli
Passive air samplers were used to evaluate long-term trends and spatial distribution of trace organic compounds in Antarctica. Duplicate PUF disk samplers were deployed at six automatic weather stations in the coastal area of the Ross sea (East Antarctica), between December 2010 and January 2011, during the XXVI Italian Scientific Research Expedition. Among the investigated persistent organic compounds, Hexachlorobenzene was the most abundant, with air concentrations ranging from 0.8 to 50 pg m(-3). In general, the following decreasing concentration order was found for the air samples analyzed: HCB > PeCB > PCBs > DDTs > HCHs...
July 2017: Chemosphere
https://www.readbyqxmd.com/read/28342352/mechanochemical-mechanism-of-rapid-dechlorination-of-hexachlorobenzene
#17
Shanshan Deng, Shaoguo Kang, Nannan Feng, Jianxin Zhu, Bo Yu, Xiaofeng Xie, Jing Chen
Recent researches indicate that mechanochemical treatment (MCT) is a promising method to degrade the environmental hazards, especially in the area of persistent organic pollutants (POPs) disposal. However, the mechanochemical dechlorination mechanism of POPs still needs to be further verified. In this mechanochemical process, hexachlorobenzene (HCB) was chosen as a model pollutant with aluminum and alumina (Al+Al2O3) powders as the co-milling regents. Both of the intermediate analysis and quantum chemical calculations were adopted to elucidate the free radical dechlorination mechanism of HCB...
March 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28336095/chlorinated-pesticides-and-natural-brominated-anisoles-in-air-at-three-northern-baltic-stations
#18
Terry F Bidleman, Hjalmar Laudon, Olle Nygren, Staffan Svanberg, Mats Tysklind
Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of -2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log KOA ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources...
March 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28332723/evidence-for-persistent-organochlorine-pollutants-in-the-human-adrenal-cortex
#19
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/28329713/pcbs-and-ocps-in-human-milk-in-eastern-siberia-russia-levels-temporal-trends-and-infant-exposure-assessment
#20
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
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