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https://www.readbyqxmd.com/read/28531955/influence-of-sediment-chemistry-and-sediment-toxicity-on-macroinvertebrate-communities-across-99-wadable-streams-of-the-midwestern-usa
#1
Patrick W Moran, Lisa H Nowell, Nile E Kemble, Barbara J Mahler, Ian R Waite, Peter C Van Metre
Simultaneous assessment of sediment chemistry, sediment toxicity, and macroinvertebrate communities can provide multiple lines of evidence when investigating relations between sediment contaminants and ecological degradation. These three measures were evaluated at 99 wadable stream sites across 11 states in the Midwestern United States during the summer of 2013 to assess sediment pollution across a large agricultural landscape. This evaluation considers an extensive suite of sediment chemistry totaling 274 analytes (polycyclic aromatic hydrocarbons, organochlorine compounds, polychlorinated biphenyls, polybrominated diphenyl ethers, trace elements, and current-use pesticides) and a mixture assessment based on the ratios of detected compounds to available effects-based benchmarks...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531952/groundwater-quality-in-the-alluvial-aquifer-system-of-northwest-india-new-evidence-of-the-extent-of-anthropogenic-and-geogenic-contamination
#2
D J Lapworth, G Krishan, A M MacDonald, M S Rao
Groundwater depletion has been widely studied in northwest India, but water quality concerns are still poorly constrained. In this study, we explore the hydrochemistry of the top 160m of the aquifer system, through detailed field studies in the Bist-Doab region, considering both anthropogenic and geogenic controls. A detailed comparison is made between sites dominated by urban and agricultural landuse. Salinity, nitrate, chloride and lead concentrations are significantly higher in the shallow (0-50m) groundwater system due to surface anthropogenic contaminant loading from agricultural and urban sources...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531917/assessing-phytotoxicity-of-trace-element-contaminated-soils-phytomanaged-with-gentle-remediation-options-at-ten-european-field-trials
#3
Celestino Quintela-Sabarís, Lilian Marchand, Petra S Kidd, Wolfgang Friesl-Hanl, Markus Puschenreiter, Jurate Kumpiene, Ingo Müller, Silke Neu, Jolien Janssen, Jaco Vangronsveld, Ioannis Dimitriou, Grzegorz Siebielec, Rafał Gałązka, Valérie Bert, Rolf Herzig, Andrew B Cundy, Nadège Oustrière, Aliaksandr Kolbas, William Galland, Michel Mench
Gentle remediation options (GRO), i.e. in situ stabilisation, (aided) phytoextraction and (aided) phytostabilisation, were implemented at ten European sites contaminated with trace elements (TE) from various anthropogenic sources: mining, atmospheric fallout, landfill leachates, wood preservatives, dredged-sediments, and dumped wastes. To assess the performance of the GRO options, topsoil was collected from each field trial, potted, and cultivated with lettuce (Lactuca sativa L.) for 48days. Shoot dry weight (DW) yield, photosynthesis efficiency and major element and TE concentrations in the soil pore water and lettuce shoots were measured...
May 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28530587/trace-elements-in-raw-milk-of-buffaloes-bubalus-bubalis-from-campania-italy
#4
Mauro Esposito, Oto Miedico, Stefania Cavallo, Roberta Pellicanò, Guido Rosato, Loredana Baldi, A Eugenio Chiaravalle
The profile of 18 trace elements was traced in 68 milk samples collected from buffalo farms in the territory known as the "Land of Fires" in the Campania region (Italy). This area has been polluted by the illegal dumping in fields of industrial or domestic waste, wich is sometimes then burned spreading toxic contaminants. Milk from buffaloes raised on rural farms might be a good indicator of environmental contamination risk in the human food chain. Trace element analysis in milk was performed using mass spectrometry...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28529953/bis-4-4-dimethyl-2-2-bipyridine-oxidovanadium-iv-sulfate-dehydrate-potential-candidate-for-controlling-lipid-metabolism
#5
Renata Francik, Jadwiga Kryczyk-Kozioł, Sławomir Francik, Ryszard Gryboś, Mirosław Krośniak
Vanadium is a trace element mainly connected with regulation of insulin metabolism which is particularly important in diabetes. In recent years, organic complexes of vanadium seem to be more interesting than inorganic salts. Nevertheless, the effect of vanadium on lipid metabolism is still a problematic issue; therefore, the main purpose of this study was to investigate the effect of 3 organic complexes of vanadium such as sodium (2,2'-bipyridine)oxidobisperoxovanadate(V) octahydrate, bis(2,2'-bipyridine)oxidovanadium(IV) sulfate dehydrate, and bis(4,4'-dimethyl-2,2'-bipyridine)oxidovanadium(IV) sulfate dihydrate in conjunction with high-fat as well as control diet in nondiabetes model on the following lipid parameters: total cholesterol, triglycerides, and high density lipoprotein as well as activity of paraoxonase 1...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28528651/manganese-in-marine-microbiology
#6
Colleen M Hansel
The importance of manganese in the physiology of marine microbes, the biogeochemistry of the ocean and the health of microbial communities of past and present is emerging. Manganese is distributed widely throughout the global ocean, taking the form of an essential antioxidant (Mn(2+)), a potent oxidant (Mn(3+)) and strong adsorbent (Mn oxides) sequestering disproportionately high levels of trace metals and nutrients in comparison to the surrounding seawater. Manganese is, in fact, linked to nearly all other elemental cycles and intricately involved in the health, metabolism and function of the ocean's microbiome...
2017: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/28527214/associations-of-spatial-disparities-of%C3%A2-alzheimer-s-disease-mortality-rates-and%C3%A2-soil-selenium-sulfur-concentrations-and-risk-factors-in-the-united-states
#7
Hongbing Sun
BACKGROUND: Associations between environmental factors and spatial disparity of mortality rates of Alzheimer's disease (AD) in the US are not well understood. OBJECTIVE: To find associations between 41 trace elements, four common risk factors, and AD mortality rates in the48 contiguous states. METHODS: Isopleth maps of AD mortality rates of the 48 states and associated factors were examined. Correlations between state average AD mortality rates and concentrations of 41 soil elements, wine consumption, percentage of current smokers, obesity, and diagnosed diabetes of the 48 states between 1999 and 2014 were analyzed...
May 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527181/physicochemical-parameters-as-a-tool-for-the-assessment-of-origin-of-honey
#8
Kristina B Lazarević, Milica S Jovetić, Živoslav Lj Tešić
Honey is a complex mixture of various substances, and its composition depends on both botanical and geographical origin, as well as anthropogenic factors. The accurate identification of honey origin guarantees the satisfaction of consumers' needs and has an impact on the honey market value. Physicochemical parameters, some of which are used in routine analysis of honey quality, could be useful for the assessment of its origin. In this review, special attention is paid to those studies that assessed the sugar and mineral composition of honey, whether they were investigated in terms of botanical or geographical origin, or for the characterization of honey type...
May 19, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28524844/emptying-dirac-valleys-in-bismuth-using-high-magnetic-fields
#9
Zengwei Zhu, Jinhua Wang, Huakun Zuo, Benoît Fauqué, Ross D McDonald, Yuki Fuseya, Kamran Behnia
The Fermi surface of elemental bismuth consists of three small rotationally equivalent electron pockets, offering a valley degree of freedom to charge carriers. A relatively small magnetic field can confine electrons to their lowest Landau level. This is the quantum limit attained in other dilute metals upon application of sufficiently strong magnetic field. Here we report on the observation of another threshold magnetic field never encountered before in any other solid. Above this field, Bempty, one or two valleys become totally empty...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28523580/chemical-characterization-of-surface-snow-in-istanbul-nw-turkey-and-their-association-with-atmospheric-circulations
#10
Asli Baysal, Hakki Baltaci, Nil Ozbek, Orhan Destanoglu, Gul Sirin Ustabasi, Gulcin Gumus
The understanding of the impurities in natural snow is important in realizing its atmospheric quality, soil characteristics, and the pollution caused to the environment. Knowledge of the occurrence of major ions and trace metals in the snow in the megacity of Istanbul is very limited. This manuscript attempts to understand the origin of major soluble ions (fluoride, acetate, formate, chlorite, chloride, nitrite, chlorate, bromide, nitrate, sulfate, phosphate, and perchlorate) and some trace metals (Fe, Mn, Cd, Co, Ni, Pb, Zn, Cu) in winter surface snow, collected in Istanbul, Turkey...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28521936/trace-element-concentrations-in-the-apex-predator-swordfish-xiphias-gladius-from-a-mediterranean-fishery-and-risk-assessment-for-consumers
#11
S Gobert, V Pasqualini, J Dijoux, P Lejeune, E D H Durieux, M Marengo
Swordfish (Xiphias gladius L., 1758) is an apex predator, highly migratory meso-pelagic fish widely distributed in the Atlantic Ocean and Mediterranean. As top predators, this fish may be the end reservoir of the bioaccumulation of trace elements in a food chain because they occupy higher trophic levels and are an important food source, causing them to be potentially hazardous to consume. This study aims to investigate the concentration of 18 trace elements of Swordfish, caught in the Mediterranean Sea and to discuss human exposure risks...
May 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28521934/talitrus-saltator-as-a-biomonitor-an-assessment-of-trace-element-contamination-on-an-urban-coastline-gradient
#12
Liam Morrison, Matthew Bennion, Ellen McGrory, William Hurley, M P Johnson
This study reports the first ever application of the trace element pollution index (TEPI) along a coastal, urban gradient using trace element concentrations (Ti, Mn, Co, Cu, As, Mo, Ag, Cd, Pb, Cr, Fe, Zn and Se) in the amphipod crustacean Talitrus saltator. Samples were collected from 10 sites in Galway Bay (Ireland) and concentrations of Pb showed the greatest spatial variation, likely due to the proximity of some sites to a former landfill and busy harbour. The TEPI used alongside the quartile method allowed for the assigning of sites to contamination level categories...
May 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28521663/towards-a-generic-procedure-for-the-detection-of-relevant-contaminants-from-waste-electric-and-electronic-equipment-weee-in-plastic-food-contact-materials-review-and-selection-of-key-parameters
#13
Franky Puype, Jiří Samsonek, Věra Vilímková, Šárka Kopečková, Andrea Ratiborská, Jan Knoop, Marion Egelkraut-Holtus, Markus Ortlieb, Uwe Oppermann
Recently, traces of brominated flame retardants (BFRs) have been detected in black plastic food contact materials (FCMs) indicating the presence of recycled plastics, mainly coming from waste electric and electronic equipment (WEEE) as BFRs are one of the main additives in electric applications. In order to evaluate efficiently and preliminary in situ the presence of WEEE in plastic FCMs, a generic procedure for evaluation of WEEE presence in plastic FCMs by using defined parameters having each an associated importance level has been proposed...
May 18, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28521510/differential-growth-promotion-of-poplar-and-birch-inoculated-with-three-dark-septate-endophytes-in-two-trace-element-contaminated-soils
#14
Charlotte Berthelot, Damien Blaudez, Corinne Leyval
Dark septate endophytes (DSEs) are abundant in stressful environments, including trace element- (TE-) enriched soils. However, knowledge about the effects of DSEs on plant growth in such soils is poor compared to the well-known mycorrhizal fungi. The aim of this work was to evaluate the effects of three DSE strains isolated from TE-contaminated soils on the growth and mineral nutrition of Betula pendula and Populus tremula x alba grown on two contrasting TE-polluted soils. The three DSEs evenly colonized the two plant species in both soils...
May 19, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28521165/alteration-of-trace-element-concentrations-in-plants-by-adhering-particles-methods-of-correction
#15
Solveig Pospiech, Wiebke Fahlbusch, Benedikt Sauer, Tino Pasold, Hans Ruppert
Trace element concentrations in plants may be influenced by airborne dust or adhering soil particles. Neglecting adhering particles in plant tissue leads to misinterpretation of trace element concentrations in research fields such as phytomining, phytoremediation, bio-monitoring, uptake of micronutrients and provenance studies. In case washing or brushing the samples prior to analysis is insufficient or impossible due to fragile or pre-processed samples mathematical correction should be applied. In this study three methods are presented allowing to subtract the influence of adhering particles in order to obtain the element concentrations in plants resulting only from uptake...
May 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28516990/cross-talk-between-neurometals-and-amyloidogenic-proteins-at-the-synapse-and-the-pathogenesis-of-neurodegenerative-diseases
#16
REVIEW
M Kawahara, M Kato-Negishi, K Tanaka
Increasing evidence suggests that disruption of metal homeostasis contributes to the pathogenesis of various neurodegenerative diseases, including Alzheimer's disease, prion diseases, Lewy body diseases, and vascular dementia. Conformational changes of disease-related proteins (amyloidogenic proteins), such as β-amyloid protein, prion proteins, and α-synuclein, are well-established contributors to neurotoxicity and to the pathogenesis of these diseases. Recent studies have demonstrated that these amyloidogenic proteins are metalloproteins that bind trace elements, including zinc, iron, copper, and manganese, and play significant roles in the maintenance of metal homeostasis...
May 18, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28516354/characterization-partitioning-and-potential-ecological-risk-quantification-of-trace-elements-in-coal-fly-ash
#17
Zeba Usmani, Vipin Kumar
Coal-based thermal power plants are the major source of power generation in India. Combustion of coal gives rise to by-products such as fly ash (FA) in huge quantities. The current study focuses on physico-chemical and mineralogical characterization and risk evaluation of FA, generated from five thermal power plants (TPPs) of India. The coal, and corresponding FA and bottom ash (BA) were further analyzed for trace elements in order to observe the enrichment and partitioning behavior of elements. The environmental risk assessment of trace elements in FA was performed in accordance with geoaccumulation index (I geo) and potential ecological risk index (PERI)...
May 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28515603/correlation-of-serum-vitamin-d-level-with-mortality-in-patients-with-sepsis
#18
Prakash Vipul, Consul Shuchi, Agarwal Avinash, Gutch Manish, Kumar Sukriti, Prakash Ved
BACKGROUND: Sepsis is the leading cause of mortality in the critically ill. Recently, it has been found in many studies that many trace elements and nutrients do have an effect on human body and if supplemented can improve the prognosis in patients with sepsis. AIM AND OBJECTIVES: Primary objective: Whether low Vitamin D is associated with mortality. Secondary objective: To find out association of low Vitamin D levels and morbidity in terms of length of hospital and Intensive Care Unit (ICU) stay...
April 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28515439/the-biomechanics-behind-extreme-osteophagy-in-tyrannosaurus-rex
#19
Paul M Gignac, Gregory M Erickson
Most carnivorous mammals can pulverize skeletal elements by generating tooth pressures between occluding teeth that exceed cortical bone shear strength, thereby permitting access to marrow and phosphatic salts. Conversely, carnivorous reptiles have non-occluding dentitions that engender negligible bone damage during feeding. As a result, most reptilian predators can only consume bones in their entirety. Nevertheless, North American tyrannosaurids, including the giant (13 metres [m]) theropod dinosaur Tyrannosaurus rex stand out for habitually biting deeply into bones, pulverizing and digesting them...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511359/occurrence-of-chemical-contaminants-in-peri-urban-agricultural-irrigation-waters-and-assessment-of-their-phytotoxicity-and-crop-productivity
#20
Anna Margenat, Víctor Matamoros, Sergi Díez, Núria Cañameras, Jordi Comas, Josep M Bayona
Water scarcity and water pollution have increased the pressure on water resources worldwide. This pressure is particularly important in highly populated areas where water demand exceeds the available natural resources. In this regard, water reuse has emerged as an excellent water source alternative for peri-urban agriculture. Nevertheless, it must cope with the occurrence of chemical contaminants, ranging from trace elements (TEs) to organic microcontaminants. In this study, chemical contaminants (i.e., 15 TEs, 34 contaminants of emerging concern (CECs)), bulk parameters, and nutrients from irrigation waters and crop productivity (Lycopersicon esculentum Mill...
May 12, 2017: Science of the Total Environment
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