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Archives of Environmental Contamination and Toxicology

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https://www.readbyqxmd.com/read/28190079/source-apportionment-of-volatile-organic-compounds-in-an-urban-environment-at-the-yangtze-river-delta-china
#1
Junlin An, Junxiu Wang, Yuxin Zhang, Bin Zhu
Volatile organic compounds (VOCs) were collected continuously during June-August 2013 and December 2013-February 2014 at an urban site in Nanjing in the Yangtze River Delta. The positive matrix factorization receptor model was used to analyse the sources of VOCs in different seasons. Eight and seven sources were identified in summer and winter, respectively. In summer and winter, the dominant sources of VOCs were vehicular emissions, liquefied petroleum gas/natural gas (LPG/NG) usage, solvent usage, biomass/biofuel burning, and industrial production...
February 11, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28150020/dietary-selenomethionine-administration-in-the-american-alligator-alligator-mississippiensis-hepatic-and-renal-se-accumulation-and-its-effects-on-growth-and-body-condition
#2
John W Finger, Matthew T Hamilton, Travis C Glenn, Tracey D Tuberville
Selenium (Se) is an essential trace nutrient, but in excess, it can induce toxicity. Incomplete combustion of coal produces coal combustion wastes, which are enriched in Se and often disposed of in aquatic basins. While a multitude of studies have investigated Se accumulation in vertebrates, few studies have examined its effects on longer-lived top trophic carnivores, such as the American alligator (Alligator mississippiensis). In this study, alligators were fed one of three Dietary Treatments: mice injected with water (controls) or water supplemented with 1000 or 2000 ppm selenomethionine (SeMet)...
February 1, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28144697/molecular-characterization-and-expression-analysis-of-p38-mapk-gene-and-protein-in-aquatic-midge-chironomus-riparius-diptera-chironomidae-exposed-to-environmental-contaminants
#3
Sun-Young Park, Jinhee Choi
P38 Mitogen-activated protein kinase (MAPK), an important signaling protein involved in various cellular processes, including stress responses, has been well characterized in model organisms. P38 has been identified in a number of insects, including the genus Drosophila; however, its homologue in Chironomus riparius has not yet been identified. In this study, we identified and characterized p38 MAPK (Crp38) gene in C. riparius using a transcriptome database that was previously generated 454 GS-FLX pyrosequencing...
January 31, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28132076/monitoring-the-genotoxic-and-cytotoxic-potential-and-the-presence-of-pesticides-and-hydrocarbons-in-water-of-the-sinos-river-basin-southern-brazil
#4
Eloisa Bianchi, Gustavo Lessing, Karisa Roxo Brina, Larissa Angeli, Natália Bordin Andriguetti, Jaqueline Regina Soares Peruzzo, Carlos Augusto do Nascimento, Fernando Rosado Spilki, Ana Luiza Ziulkoski, Luciano Basso da Silva
The Sinos River is one of the most polluted rivers in Brazil. The purpose of this work was to monitor the presence of some pesticides and hydrocarbons as well as the genotoxic and cytotoxic potential on HEp-2 cells from water samples collected at seven sites in the Sinos River Basin (SRB), southern Brazil. Nine samples were taken from the three main rivers in the SRB and used as a solution to dilute the HEp-2 cell culture medium after microfiltration. Twenty-four pesticides and 19 hydrocarbons were measured...
January 28, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28105488/effects-of-ceo2-nanoparticles-on-terrestrial-isopod-porcellio-scaber-comparison-of-ceo2-biological-potential-with-other-nanoparticles
#5
Olga Malev, Polonca Trebše, Małgorzata Piecha, Sara Novak, Bojan Budič, Miroslav D Dramićanin, Damjana Drobne
Nano-sized cerium dioxide (CeO2) particles are emerging as an environmental issue due to their extensive use in automobile industries as fuel additives. Limited information is available on the potential toxicity of CeO2 nanoparticles (NPs) on terrestrial invertebrates through dietary exposure. In the present study, the toxic effects of CeO2 NPs on the model soil organism Porcellio scaber were evaluated. Nanotoxicity was assessed by monitoring the lipid peroxidation (LP) level and feeding rate after 14-days exposure to food amended with nano CeO2...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28102440/thyroid-hormones-retinol-and-clinical-parameters-in-relation-to-mercury-and-organohalogen-contaminants-in-great-blue-heron-ardea-herodias-nestlings-from-the-st-lawrence-river-qu%C3%A3-bec-canada
#6
Louise Champoux, Monique Boily, Guy Fitzgerald
The exposure and effects of persistent environmental contaminants were investigated in great blue heron (Ardea herodias) nestlings sampled in 2001, 2002, 2006, and 2007 in freshwater and estuarine heronries along the St. Lawrence River, Québec (Canada). Biomarkers (retinoids, thyroid hormones, and clinical parameters) and contaminants (organochlorine contaminants, polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs), and mercury (Hg)) were analyzed in blood, and Hg was analyzed in feathers (generally 9 nestlings per colony and 4 colonies per year)...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28074227/heavy-metals-in-liver-and-brain-of-waterfowl-from-the-evros-delta-greece
#7
Maria Aloupi, Asimina Karagianni, Savas Kazantzidis, Triantaphyllos Akriotis
The concentrations of six heavy metals (cadmium [Cd], chromium [Cr], copper [Cu], manganese [Mn], lead [Pb], and zinc [Zn]) were determined in liver and brain of nine species of waterfowl from the Evros Delta, one of the most important wetlands in Greece, to assess metal contamination and potential risk to waterfowl. Significant differences among species were found for hepatic Cr, Cu, Pb, and Zn; the highest levels of all metals were found in liver of mute swans. Cd increased significantly with age in both organs of wigeon; some differences were also observed between males and females of the same species...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28064370/changes-in-sport-fish-mercury-concentrations-from-food-web-shifts-suggest-partial-decoupling-from-atmospheric-deposition-in-two-colorado-reservoirs
#8
Brian A Wolff, Brett M Johnson, Jesse M Lepak
Partial decoupling of mercury (Hg) loading and observed Hg concentrations ([Hg]) in biotic and abiotic samples has been documented in aquatic systems. We studied two Colorado reservoirs to test whether shifts in prey for sport fish would lead to changes in [Hg] independent of external atmospheric Hg deposition. We compared sport fish total mercury concentrations ([T-Hg]) and macroinvertebrate (chironomids and crayfish) methylmercury concentrations ([MeHg]) before and after food web shifts occurred in both reservoirs...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28054105/comparative-developmental-toxicity-of-desalination-brine-and-sulfate-dominated-saltwater-in-a-euryhaline-fish
#9
Allison Kupsco, Rafid Sikder, Daniel Schlenk
Desalination is a promising sustainable solution to meet growing water needs of cities across the United States. However, the environmental impacts of the resulting filtrate (brine) discharged to surface water need to be evaluated before large-scale desalination can be successful in the United States. Developing fish are especially sensitive to changes in salinity and varying ionic composition. Limited research is available on the impacts of hypersalinity on chronic vertebrate embryonic development, particularly on sublethal effects...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28050624/toxicity-assessment-of-binary-metal-mixtures-copper-zinc-to-nitrification-in-soilless-culture-with-the-extended-biotic-ligand-model
#10
Aiju Liu, JinXin Li, Menghong Li, Xiao Yin Niu, Jun Wang
Metals are always found in the environment as mixtures rather than as solitary elements. Only a limited number of studies have developed appropriate models that incorporate bioavailability to estimate the toxicity of heavy-metal mixtures. In the present study, we explored the applicability of two extended biotic ligand model (BLM) approaches-BLM-f mix and BLM-toxicity unit (TU)-to predict and interpret mixture toxicity with the assumption that interactions between metal ions obey the BLM theory. Exposure assays of single and mixed metals were performed with inoculums of an ammonia-oxidizing bacterium SD5 isolated from soil...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28040852/testing-local-adaptation-in-five-populations-of-hyalella-azteca-in-northern-alberta-s-oil-sands-region
#11
Steven R Beery, Patrick T Gauthier, Gregory G Pyle
Canada's oil sands hold the third largest petroleum reserves worldwide and have experienced rapid economic growth. The oil sands region provides an ideal location for studying local adaptations through reciprocal transplant (RT) because populations within the region have been historically exposed to naturally occurring bitumen. Our objectives were to (1) determine if Hyalella azteca from habitats within the oil sands region exhibited increased tolerance to constituents associated with industrial bitumen extraction compared with H...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27999877/influence-of-road-proximity-on-the-concentrations-of-heavy-metals-in-korean-urban-agricultural-soils-and-crops
#12
Hyuck Soo Kim, Kwon-Rae Kim, Won-Il Kim, Gary Owens, Kye-Hoon Kim
The urban agricultural (UA) environment near active roadways can be degraded by traffic-related particles (i.e., exhaust gases and road dust), which may contain heavy metals. The current study investigated changes in heavy-metal [cadmium (Cd), copper (Cu), chromium (Cr) nickel (Ni), lead (Pb) and zinc (Zn)] concentrations in soils located near highly trafficked roads in Korea and the subsequent uptake of these metals by Chinese cabbage. Heavy-metal plant concentrations were determined in both washed and unwashed plant leaves to determine whether foliar deposition played any role in plant metal uptake...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27990606/geochemical-assessment-of-trace-element-pollution-in-surface-sediments-from-the-georges-river-southern-sydney-australia
#13
Yasir M Alyazichi, Brian G Jones, Errol McLean, Joel Pease, Heidi Brown
Measurement of elevated trace elements is an important component of environmental assessment and management of estuarine marine sediments in systems adjacent to concentrated human activity. The present study surveys the estuarine sediments in selected tributary bays, creeks, and the upper segments of the Georges River system, NSW, Australia, which flows into the Tasman Sea through Botany Bay. A total of 146 surface sediment samples were analysed by X-ray fluorescence. Potential pollution of sediments was evaluated using potential load index, modified degree of contamination, and potential ecological risk index...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27990605/profiling-of-selected-functional-metabolites-in-the-central-nervous-system-of-marine-medaka-oryzias-melastigma-for-environmental-neurotoxicological-assessments
#14
Elva Ngai-Yu Lei, Man-Shan Yau, Chi-Chung Yeung, Margaret B Murphy, Ka-Leung Wong, Michael Hon-Wah Lam
The simultaneous profiling of 43 functional metabolites in the brain of the small model vertebrate organism, marine medaka (Oryzais melastigma), has been accomplished via dansyl chloride derivatization and LC-MS/MS quantification. This technique was applied to examine effects of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47), one of the most abundant polybrominated diphenyl ether flame retardants in the natural environment, on the central nervous system (CNS) of vertebrates. The model teleosts were fed with bioencapsulated Artemia nauplii for up to 21 days...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27986996/the-degree-of-impairment-of-foraging-in-crayfish-orconectes-virilis-due-to-insecticide-exposure-is-dependent-upon-turbulence-dispersion
#15
Timothy S Ludington, Paul A Moore
As toxicants move into aquatic systems, the concentration at any point in space or time is heavily influenced by the flow dynamics. The dispersion of these chemicals creates a toxicant concentration that fluctuates widely in time and is highly dependent on the spatial heterogeneity of turbulence. Despite this knowledge on the movement of toxicants in natural systems, most ecotoxicological studies use static exposure paradigms that ignore the spatio-temporal dynamics of toxicants in aquatic systems. Although recent studies have begun to use pulsed paradigms in an attempt to mimic natural conditions, the heterogeneity of real concentrations in natural systems rarely is considered for use in these tests...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27986995/the-effect-of-atrazine-on-louisiana-gulf-coast-estuarine-phytoplankton
#16
Alexis V Starr, Sibel Bargu, Kanchan Maiti, Ronald D DeLaune
Pesticides may enter water bodies in areas with a high proportion of agricultural land use through surface runoff, groundwater discharge, and erosion and thus negatively impact nontarget aquatic organisms. The herbicide atrazine is used extensively throughout the Midwest and enters the Mississippi River through surface runoff and groundwater discharge. The purpose of this study was to determine the extent of atrazine contamination in Louisiana's estuaries from Mississippi River water under different flow and nutrient regimes (spring and summer) and its effect on the biomass and oxygen production of the local phytoplankton community...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27933359/raccoons-procyon-lotor-as-sentinels-of-trace-element-contamination-and-physiological-effects-of-exposure-to-coal-fly-ash
#17
Felipe Hernández, Ricki E Oldenkamp, Sarah Webster, James C Beasley, Lisa L Farina, Samantha M Wisely
Anthropogenic pollutants disrupt global biodiversity, and terrestrial sentinels of pollution can provide a warning system for ecosystem-wide contamination. This study sought to assess whether raccoons (Procyon lotor) are sentinels of local exposure to trace element contaminants at a coal fly ash site and whether exposure resulted in health impairment or changes in the intestinal helminth communities. We compared trace element accumulation and the impact on health responses and intestinal helminth communities of raccoons inhabiting contaminated and reference sites of the U...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27904922/impacts-of-sediment-organic-matter-content-and-ph-on-ecotoxicity-of-coexposure-of-tio2-nanoparticles-and-cadmium-to-freshwater-snails-bellamya-aeruginosa
#18
Taowu Ma, Meng Wang, Shuangjiao Gong, Bin Tian
The environmental factors are expected to affect the ecotoxicity of heavy metals in the presence of engineered nanoparticles (NPs) in aquatic ecosystems. However, in sediment scenario, little is known regarding their impacts on the ecotoxicity of co-exposure of sediment-associated heavy metals and NPs. This study evaluated the impacts of different levels of organic matter (OM) (4.8-11.6%) and pH (6-9) on the ecotoxicological effects of co-exposure of sediment-associated titanium dioxide nanoparticles (TiO2-NPs) and cadmium (Cd) to a freshwater gastropod Bellamya aeruginosa...
January 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27900424/long-term-geochemical-evolution-of-lithogenic-versus-anthropogenic-distribution-of-macro-and-trace-elements-in-household-attic-dust
#19
Biljana Balabanova, Trajče Stafilov, Robert Šajn, Claudiu Tănăselia
Attic dusts were examined as historical archives of anthropogenic emissions, with the goal of elucidating the enrichment pathways associated with hydrothermal exploitation of Cu, Pb, and Zn minerals in the Bregalnica River basin in the eastern part of the Republic of Macedonia. Dust samples were collected from 84 settlements. Atomic emission spectrometry and mass spectrometry with inductively coupled plasma were applied as analytical techniques for the determination of 69 element contents. Multivariate analysis was applied for the extraction of dominant geochemical markers...
January 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27900423/contamination-fractionation-and-biological-risk-related-to-metals-in-surface-sediments-from-the-largest-deep-freshwater-lake-in-china
#20
Hua-Bing Li, Yang-Guang Gu, Rong Wang, Hui-Bin Lu
The toxicity and mobility of metals in the environment are driven by their specific chemical forms and binding states. However, heavy metal fractionation in sediments from plateau deep lakes in China is rare. This study analyzed surface sediments collected from Fuxian Lake, the largest deep freshwater lake in China; parameters examined included total metal concentrations, chemical partitioning, and biological risk assessment. The average total concentrations (mg/kg) were 7.9 for Cd, 97.6 for Pb, 102.8 for Cr, 60...
January 2017: Archives of Environmental Contamination and Toxicology
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