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Lei Zhang, Xin Liu, Guimin Meng, Min Chi, Jingguang Li, Shuaixing Yin, Yunfeng Zhao, Yongning Wu
Several studies support a plausible association of human exposure to polychlorinated biphenyls (PCBs) with type 2 diabetes mellitus. However, little is known about the potential link between circulating PCBs levels in early pregnancy and development of gestational diabetes mellitus (GDM). Here, we conducted a prospective study with a nested case-control design to determine the association of PCB exposure in early pregnancy with GDM risk. Concentrations of selected so-called 'indicator PCBs' were determined in sera of women in the first trimester of pregnancy via gas chromatography - high resolution mass spectrometry...
March 17, 2018: Environment International
Yuming Hu, Chuanzhu Yi, Jingguang Li, Xiaohong Shang, Zimin Li, Xiaochen Yin, Bo Chen, Yuechan Zhou, Yinyin Zhang, Yongning Wu
Japanese schistosomiasis was endemic in Dongting Lake, the second largest freshwater lake in China. The technical sodium pentachlorophenate (Na-PCP) was widely used during the period between the early 1960s and early 1990s to kill oncomelania, the intermediate host of Schistosomes. However, polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) also contaminated the environment of Dongting Lake due to trace impurities of Na-PCP. In this study, 13 species of freshwater fish were collected from Dongting Lake and analyzed in wet and dry seasons...
March 19, 2018: Environmental Monitoring and Assessment
Hu Cheng, Yang Song, Fang Wang, Rongting Ji, Xiaona Li, Yuhao Fu, Xinglun Yang, Yongrong Bian, Xin Jiang
Porous materials have great prospective applications for solid-phase microextraction (SPME) technology because of their large specific surface area and pore volume. In this study, a hierarchical porous carbon (HPC) was synthesized by simple hydrothermal reaction and potassium hydroxide (KOH) activation of crude biomass and found to be an efficient adsorbent for SPME of organic pollutants. Results show that the as-prepared HPC has a partly graphitic amorphous-like structure with ultrahigh specific surface area (2551 m2 /g), high pore volume (1...
March 13, 2018: Journal of Chromatography. A
Francesco Paolo Serpe, Filomena Fiorito, Mauro Esposito, Angelo Ferrari, Federico Fracassi, Roberto Miniero, Marco Pietra, Paola Roncada, Gianfranco Brambilla
The domestic cat (Felis catus) was used as a sentinel of exposure to polychlorobiphenyls (PCBs) in indoor urban environments y. Sera from 120 cats were pooled to form 30 different groups selected by age (<2 years; > 2 ≤ 8 years; > 8 years), sex, municipality (Bologna and Turin) and environment (indoor vs. outdoor). Test portions of 1 mL were analyzed by means of gas chromatography coupled to high-resolution mass spectrometry (GC-HRMS) for six selected indicators non-dioxin-like PCBs (∑6 PCBs: congeners #28, #52, #101, #132, #153 and #180) and the results were computed in the upper-bound mode...
March 19, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Christine M Custer, Thomas W Custer, Paul M Dummer, Diana Goldberg, J Christian Franson
Tree swallow (Tachycineta bicolor) eggs and nestlings were collected from 16 sites across the Great Lakes to quantify normal annual variation in total polychlorinated biphenyl (PCB) exposure and to validate the sample size choice in earlier work. A sample size of five eggs or five nestlings per site was adequate to quantify exposure to PCBs in tree swallows given the current exposure levels and variation. There was no difference in PCB exposure in two randomly selected sets of five eggs collected in the same year, but analyzed in different years...
March 17, 2018: Environmental Monitoring and Assessment
Mehmet Eray Alcigir, Halef Okan Dogan, Begum Yurdakok, Kubra Dogan, Sevil Vural, Fatma Meric Yilmaz, Atilla Isgoren
Aroclor 1254 is a widespread toxic compound of Polychlorinated Biphenyls (PCBs), which can create significant nervous problems. No remedies have been found to date. The aim of this study was to reveal the damage that occurs in the central nervous system of rat pups exposed to Aroclor 1254 in the prenatal period, and to show the inhibiting effect of curcumin, which is a strong anti-oxidant and neuroprotective substance. The study established 3 groups of adult female and male Wistar albino rats. The rats were mated within these groups and the offspring rats were evaluated within the group given Aroclor 1254 only (n=10) and the group given both Aroclor 1254 and curcumin (n=10) and the control group (n=10)...
March 15, 2018: CNS & Neurological Disorders Drug Targets
Xuefeng Guo, Chao Yu, Zhouyang Yin, Shouheng Sun, Christopher Takakazu Seto
We report a Ni30Pd70/nitrogen-doped graphene (NG) catalyst that hydrodehalogenates halogenated aromatics under mild reaction conditions. It reduces mono- or dichloroarenes to the corresponding dehalogenated arenes in >90% yield in 10% aqueous isopropanol solvent at or below 50C within 5 hours. Tests on a variety of substrates containing various functional groups show that the catalyst is selective for reduction of C-Cl and C-Br bonds. In addition, this catalyst completely hydrodehalogenates high concentration solutions of dioxin, polychlorinated biphenyls (PCBs), chloroaromatic constituents of the defoliant agent orange, and polybrominated diphenyl ethers (PBDEs) in 12 hours...
March 14, 2018: ChemSusChem
Ashwin Rammohan, Sripriya Srinivas, Yahya Al Azri, Mettu Srinivas Reddy, Mohamed Rela
Roux-en-Y (RY) hepaticojejunostomy (HJ) is a critical component of complex hepatobiliary operations, and it is the treatment of choice for post-cholecystectomy biliary strictures (PCBS). Complications related to the Roux limb, particularly those leading to cholangitis, can severely compromise outcomes. We present a case of a 54-year-old lady who had previously undergone two HJ procedures for recurrent PCBS. The same Roux limb had been used in each of the operations. Short Roux/Roux reflux syndrome led to recurrent cholangitis in this patient, as proven by the reflux of oral contrast into the biliary tree on imaging...
February 2018: Annals of Hepato-Biliary-Pancreatic Surgery
Tingting Hu, Mengyun Yao, Xiaoxia Fu, Chaolu Chen, Ruijin Wu
Polychlorinated biphenyls (PCBs), as part of environmental contaminants, have been proved to be related to endometriosis. This study is to investigate the effect of PCB 104 on cell migration, invasion and resultant gene expression in endometrial stromal cells (ESCs). Fifty-three specimens of eutopic endometrial tissues were collected from twenty-four women with endometriosis (EU-EMS) and twenty-nine women without endometriosis (EU-NON). Both EU-EMS and EU-NON were divided into the PCB 104 exposure group and the control group according to whether they were exposed to PCB 104...
March 10, 2018: Toxicology Letters
Phealay May, Patricia Bremond, Christophe Sauzet, Philippe Piccerelle, Frédérique Grimaldi, Serge Champion, Pierre-Henri Villard
(1) Objective: Highlight the in vitro effects of 3T3-L1 cell exposure to polychlorinated biphenyls (PCB118 and 153) or benzo(a)pyrene (BaP) alone or as a cocktail on adipogenesis (ADG) by focusing on changes in lipid metabolism and inflammatory-related genes expression (INFG) and ADG-related genes expression (ADGG); (2) Results: Treatment from the early stage of cell differentiation by BaP alone or in combination with PCBs decreased the expression of some of the ADGG ( PPARγ Glut-4 , FAS , Lipin-1a , Leptin , and Adiponectin )...
March 13, 2018: International Journal of Molecular Sciences
Ami R Zota, Ruth J Geller, Laura E Romano, Kimberly Coleman-Phox, Nancy E Adler, Emily Parry, Miaomiao Wang, June-Soo Park, Angelo F Elmi, Barbara A Laraia, Elissa S Epel
BACKGROUND: Endocrine-disrupting chemicals (EDCs) can target immune and metabolic pathways. However, few epidemiologic studies have examined the influence of EDCs on measures of inflammation and cellular aging during pregnancy and postpartum. OBJECTIVE: We investigated associations between prenatal exposures to polybrominated diphenyl ethers (PBDEs), hydroxylated PBDE metabolites (OH-PBDEs), polychlorinated biphenyls (PCBs), and per- and polyfluorochemicals (PFASs) with repeated biomarker measurements of inflammation and cellular aging in women during pregnancy and the postpartum period...
March 10, 2018: Environment International
Luca Maria Chiesa, Sara Panseri, Maria Nobile, Federica Ceriani, Francesco Arioli
Demand for honey is increasing, especially if it is organic and if its nutritional properties are linked to untreated environments in order to guarantee quality for health. Sources of contamination of honey can be divided into environmental and apicultural Therefore, the distribution of POPs (persistent organic pollutants), pesticides and antibiotic residues from geographical areas with different contamination sources (high anthropic impact, intensive farming, husbandry and low anthropic impact) was investigated in order to confirm the potential transfer of xenobiotics into the supply chain and to give beekeepers tools for the selection of areas dedicated to organic production...
March 13, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Shixiang Dai, Ling Zhao, Ying Teng, Xiaomi Wang, Wenjie Ren
The fate and transport of polychlorinated biphenyls (PCBs), a class of persistent organic compounds, in soils was markedly affected by their sorption/desorption on soil organic matters (SOM) due to high hydrophobicity of PCBs. Humic acid (HA), an important fraction of SOM, has no steady composition and microstructure from different origins, resulting in their diverse sorption capacity. Therefore, the effect of composition and microstructure of HA on sorption of 3,3',4,4'-tetrachlorobiphenyl (PCB77) was investigated in this study...
March 12, 2018: Environmental Science and Pollution Research International
Rosanne J Michielsen, Judy Shamoun-Baranes, John R Parsons, Michiel H S Kraak
Persistent organic pollutants (POPs) are present in almost all environments due to their high bioaccumulation potential. Especially species that adapted to human activities, like gulls, might be exposed to harmful concentrations of these chemicals. The nature and degree of the exposure to POPs greatly vary between individual gulls, due to their diverse foraging behavior and specialization in certain foraging tactics. Therefore, in order clarify the effect of POP-contaminated areas on gull populations, it is important to identify the sources of POP contamination in individual gulls...
March 13, 2018: Reviews of Environmental Contamination and Toxicology
Quan Zhang, Ximing Wang, Jianqiang Zhu, Zhe Li, Ye Wang
The Grand Canal is one of the most important waterways and sources of drinking water in China. The security of this water environment has a strong influence on national economic development and public health. However, data on the pollution status and potential risks due to persistent organic pollutants (POPs) in this area is insufficient. In this study, we selected a branch of the Grand Canal in Hangzhou as the study subject from which 16 surface water samples were collected in the summer of 2016. The concentrations of organochlorine pesticides (OCPs) (including 4 hexachlorocyclohexanes (HCHs) and 6 dichlorodiphenyltrichloroethanes (DDTs)), 12 polycyclic aromatic hydrocarbons (PAHs), and 35 polychlorinated biphenyls (PCBs) in the water samples were determined by gas chromatography-mass spectrometry (GC-MS)...
March 12, 2018: Environmental Monitoring and Assessment
Anber Naqvi, Abdul Qadir, Adeel Mahmood, Mujtaba Baqar, Iqra Aslam, Farhan Sajid, Mehvish Mumtaz, Jun Li, Gan Zhang
The present study biomonitored the placental polychlorinated biphenyl (PCB) concentrations in women from Punjab Province, Pakistan, that provides the pioneer data for occurrence and body burden of PCBs in placental tissues from South Asian women. The ∑34 PCB concentrations in placental tissues were ranged from 20.2 to 115.98 ng/g lipid weight (lip. wt.), with predominance of tetra-PCB (54.67%). The levels of ∑8 DL-PCBs and ∑6 -indicator PCBs were ranged from 2.03 to 27.64 ng/g (lip. wt.) and 1.71 to 30...
March 11, 2018: Environmental Science and Pollution Research International
S Rebekah Burket, Yelena Sapozhnikova, Shan S Chung, Bryan W Brooks
Aquaculture, which is growing 3-5 times faster than terrestrial agriculture, will play an important role to meet future global food production needs. However, over 80% of global sewage production is returned to the environment untreated or poorly treated. In developing nations, these non-traditional waters of diverse quality are being recycled for aquaculture, yet chemical residues are differentially studied. Here, we examined pharmaceuticals, pesticides, PCBs, PBDEs, PAHs and flame retardants in marine bivalves using isotope dilution LC-MS/MS and low pressure (LP)GC-MS/MS...
March 10, 2018: Journal of Agricultural and Food Chemistry
Ana Paula Moreno Barbosa, Paula Méndez-Fernandez, Patrick Simões Dias, Marcos César Oliveira Santos, Satie Taniguchi, Rosalinda Carmela Montone
Persistent organic pollutants (POPs) accumulate in the fat tissue of living organisms and are found in relatively high concentrations in animals at the top of the food chain, such as dolphins. The ability of these compounds to interact with the endocrine system of marine mammals constitutes a risk for the reproduction and conservation of species. The La Plata dolphin, Pontoporia blainvillei, is exclusive to the southwestern Atlantic Ocean and is classified on the IUCN red list as a vulnerable species. Blubber, liver, kidney and muscle samples from four P...
March 7, 2018: Science of the Total Environment
Christine M Custer, Thomas W Custer, Matthew A Etterson, Paul M Dummer, Diana Goldberg, J Christian Franson
During 2010-2014, tree swallow (Tachycineta bicolor) reproductive success was monitored at 68 sites across all 5 Great Lakes, including 58 sites located within Great Lakes Areas of Concern (AOCs) and 10 non-AOCs. Sample eggs were collected from tree swallow clutches and analyzed for contaminants including polychlorinated biphenyls (PCBs), dioxins and furans, polybrominated diphenyl ethers, and 34 other organic compounds. Contaminant data were available for 360 of the clutches monitored. Markov chain multistate modeling was used to assess the importance of 5 ecological variables and 11 of the dominant contaminants in explaining the pattern of egg and nestling failure rates...
March 9, 2018: Ecotoxicology
A R Fernandes, D Mortimer, M Holmes, M Rose, L Zhihua, X Huang, F Smith, S Panton, L Marshall
The occurrence of a range of regulated and emerging organic environmental contaminants was investigated in 182 samples of edible marine fish sampled mainly from UK marine regions, but extending northerly to the coast of Norway and south to the Algarve. These species (sprats, mackerel, turbot, halibut, herring, grey mullet, sea bass, grey mullet, sardines, etc.) are among those considered to be at the highest risk of contamination with regulated contaminants such as polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, dioxins), and polychlorinated biphenyls (PCBs), but the occurrence of polybrominated diphenylethers (PBDEs) and polybrominated biphenyls (PBBs) was also investigated...
March 6, 2018: Environment International
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