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https://www.readbyqxmd.com/read/29876847/heavy-metals-and-arsenic-content-in-water-along-the-southern-caspian-coasts-in-iran
#1
Mohammad Abadi, Abbasali Zamani, Abdolhossein Parizanganeh, Younes Khosravi, Hamid Badiee
Due to the importance of pollution monitoring in marine ecosystems and lack of a coherent and systematic investigation of heavy metal ions along the southern shores of the Caspian Sea, in the present study, the amount of these metals and As ions in coastal waters along its 780-km-long coast in Iran have been studied. Heavy metals (cobalt, nickel, copper, zinc, cadmium, mercury, lead) and a poisonous metalloid (arsenic) were selected in 59 sampling stations and determined using differential pulse polarography method...
June 6, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29863208/promoting-effect-of-nickel-hydroxide-on-the-electrocatalytic-performance-of-pt-in-alkaline-solution
#2
Yao Wang, Yuchen Qin, Xin Zhang, Xiaoping Dai, Hongying Zhuo, Chenglong Luan, Yan Jiang, Huihui Zhao, Hai Wang, Xingliang Huang
Despite intense research in the past decades, the lack of high-performance catalysts for fuel cell reactions remains a challenge in realizing fuel cell applications. Herein, we report a novel hybrid nanomaterial of platinum-nickel hydroxide-nanotubes (Pt/Ni(OH)2/CNTs) for improving electrocatalytic performance in alkaline environments. Ni(OH)2 was directly grown on functionalized nanotubes and then, Pt nanoparticles were in situ immobilized by the microwave synthesis method. Due to electronic and synergistic effects, 10 : 2-Pt/Ni(OH)2/N-CNT catalyst exhibited 2...
June 4, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29365163/extra-articular-retained-missiles-is-surveillance-of-lead-levels-needed
#3
Walter N Nickel, Theodore J Steelman, Zena R Sabath, Benjamin K Potter
Background: Although gunshot wounds are relatively common, lead toxicity associated with extra-articular retained missiles (EARMs) is an uncommon, yet potentially devastating, complication. Although the risk of lead toxicity with intra-articular retained missiles is well known, EARMs are routinely left in situ or only removed in selected circumstances secondary to the relatively rare occurrence of complications. Methods: We first describe a patient with systemic lead poisoning associated with retained lead fragments after a gunshot-induced left femoral shaft fracture...
March 1, 2018: Military Medicine
https://www.readbyqxmd.com/read/29201629/rational-design-of-a-water-storable-hierarchical-architecture-decorated-with-amorphous-barium-oxide-and-nickel-nanoparticles-as-a-solid-oxide-fuel-cell-anode-with-excellent-sulfur-tolerance
#4
Yufei Song, Wei Wang, Lei Ge, Xiaomin Xu, Zhenbao Zhang, Paulo Sérgio Barros Julião, Wei Zhou, Zongping Shao
Solid oxide fuel cells (SOFCs), which can directly convert chemical energy stored in fuels into electric power, represent a useful technology for a more sustainable future. They are particularly attractive given that they can be easily integrated into the currently available fossil fuel infrastructure to realize an ideal clean energy system. However, the widespread use of the SOFC technology is hindered by sulfur poisoning at the anode caused by the sulfur impurities in fossil fuels. Therefore, improving the sulfur tolerance of the anode is critical for developing SOFCs for use with fossil fuels...
November 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29158002/sofc-single-cells-fed-by-biogas-experimental-tests-with-trace-contaminants
#5
Davide Papurello, Andrea Lanzini
Biogas from biological treatments and from the waste degradation in landfills generally contains a wide range of trace impurities (e.g., sulphur compounds, siloxanes, halogens, tar compounds, etc.). This paper describes an experimental analysis performed with SOFC single cells fed by a synthetic gas polluted by H2 S, HCl, D4 and a mixture of H2 S + C2 Cl4 . The aim is to detect the threshold tolerance limit on different cell performance parameters. Results show how: hydrogen sulphide has a strong impact on the polarization losses due to the nickel sulphide formation on the electrode that causes a mass transfer resistance...
February 2018: Waste Management
https://www.readbyqxmd.com/read/29064188/reconsidering-water-electrolysis-producing-hydrogen-at-cathodes-together-with-selective-oxidation-of-n-butylamine-at-anodes
#6
Song Xue, Sebastian Watzele, Viktor Čolić, Kurt Brandl, Batyr Garlyyev, Aliaksandr S Bandarenka
Electrocatalysis for the oxygen evolution reaction (OER) is of great interest for improving the effectiveness of water splitting devices. Decreasing the anodic overpotential and simultaneously changing the anodic reaction selectively to produce valuable chemicals instead of O2 would be a major improvement of the overall cost efficiency. Some amines, when present in aqueous electrolytes, were recently shown to change the selectivity of the anodic process to generate H2 O2 rather than O2 on MnOx at pH 10. This results in unusually high apparent "anodic activities"...
December 22, 2017: ChemSusChem
https://www.readbyqxmd.com/read/29058747/cobalt-and-nickel-impair-dna-metabolism-by-the-oxidative-stress-independent-pathway
#7
Vineet Kumar, Rajesh Kumar Mishra, Gursharan Kaur, Dipak Dutta
The oxidative stress that evolves under cobalt and nickel exposure is thought to exert toxicity, though the exact routes of such metal poisoning remain ambiguous. We revisited the metal toxicity in Escherichia coli to show that cobalt and nickel exposure at levels as low as 0.5 and 1 mM, respectively, visibly inhibits growth. We also observed that acidic conditions aggravated, while alkaline conditions alleviated the metal toxicity. Besides, 1 mM manganese, which is non-cytotoxic, as judged by the growth of E...
November 15, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28937739/applications-of-iridium-catalyzed-asymmetric-allylic-substitution-reactions-in-target-oriented-synthesis
#8
Jianping Qu, Günter Helmchen
Metal catalyzed allylic substitution is a cornerstone of organometallic and synthetic chemistry. Enantioselective versions have been developed with catalysts derived from transition metals, most notably molybdenum, nickel, ruthenium, rhodium, iridium, palladium, and copper. The palladium- and the iridium-catalyzed versions have turned out to be particularly versatile in organic synthesis because of the very broad scope of the nucleophile and great functional group compatibility. Assets of the iridium-catalyzed reaction are the formation of branched, chiral products from simple monosubstituted allylic substrates, high degrees of regio- and enantioselectivity, and use of modular, readily available chiral ligands...
October 17, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28694031/in-vivo-induction-of-regulatory-t-cells-promotes-allergen-tolerance-and-suppresses-allergic-contact-dermatitis
#9
Stephen C Balmert, Cara Donahue, John R Vu, Geza Erdos, Louis D Falo, Steven R Little
Allergic contact dermatitis (ACD) is a common T-cell mediated inflammatory skin condition, characterized by an intensely pruritic rash at the site of contact with allergens like poison ivy or nickel. Current clinical treatments use topical corticosteroids, which broadly and transiently suppress inflammation and symptoms of ACD, but fail to address the underlying immune dysfunction. Here, we present an alternative therapeutic approach that teaches the immune system to tolerate contact allergens by expanding populations of naturally suppressive allergen-specific regulatory T cells (Tregs)...
September 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28666216/assessment-of-28-trace-elements-and-17-amino-acid-levels-in-muscular-tissues-of-broiler-chicken-gallus-gallus-suffering-from-arsenic-trioxide
#10
Si-Wen Li, Ying He, Hong-Jing Zhao, Yu Wang, Juan-Juan Liu, Yi-Zhi Shao, Jing-Lun Li, Xiao Sun, Li-Na Zhang, Ming-Wei Xing
The contents of 28 trace elements, 17 amino acid were evaluated in muscular tissues (wings, crureus and pectoralis) of chickens in response to arsenic trioxide (As2 O3 ). A total of 200 one-day-old male Hy-line chickens were fed either a commercial diet (C-group) or an As2 O3 supplement diet containing 7.5mg/kg (L-group), 15mg/kg (M-group) or 30mg/kg (H-group) As2 O3 for 90 days. The elements content was analyzed by inductively coupled plasma mass spectrometry (ICP-MS). Under As2 O3 exposure, the concentration of As were elevated 8...
October 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28643849/prevalence-of-exposure-of-heavy-metals-and-their-impact-on-health-consequences
#11
Kanwal Rehman, Fiza Fatima, Iqra Waheed, Muhammad Sajid Hamid Akash
Even in the current era of growing technology, the concentration of heavy metals present in drinking water is still not within the recommended limits as set by the regulatory authorities in different countries of the world. Drinking water contaminated with heavy metals namely; arsenic, cadmium, nickel, mercury, chromium, zinc, and lead is becoming a major health concern for public and health care professionals. Occupational exposure to heavy metals is known to occur by the utilization of these metals in various industrial processes and/or contents including color pigments and alloys...
January 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28539940/horizontal-and-vertical-distribution-of-heavy-metals-in-farm-produce-and-livestock-around-lead-contaminated-goldmine-in-dareta-and-abare-zamfara-state-northern-nigeria
#12
O E Orisakwe, O O Oladipo, G C Ajaezi, N A Udowelle
Background. Hitherto studies in response to the June 2010 lead poisoning, Zamfara State, Nigeria, have focused on clinical interventions without information on livestock and other metals. Objective. This study has investigated the distribution of heavy metals in farm produce and livestock around lead-contaminated goldmine in Dareta and Abare, Zamfara State, Nigeria. Methods. Vegetables, soil, water, blood, and different meat samples were harvested from goat, sheep, cattle, and chicken from Dareta, Abare, and Gusau communities...
2017: Journal of Environmental and Public Health
https://www.readbyqxmd.com/read/28335315/oxidation-of-co-and-methanol-on-pd-ni-catalysts-supported-on-different-chemically-treated-carbon-nanofibers
#13
Juan Carlos Calderón, Miguel Rios Ráfales, María Jesús Nieto-Monge, Juan Ignacio Pardo, Rafael Moliner, María Jesús Lázaro
In this work, palladium-nickel nanoparticles supported on carbon nanofibers were synthesized, with metal contents close to 25 wt % and Pd:Ni atomic ratios near to 1:2. These catalysts were previously studied in order to determine their activity toward the oxygen reduction reaction. Before the deposition of metals, the carbon nanofibers were chemically treated in order to generate oxygen and nitrogen groups on their surface. Transmission electron microscopy analysis (TEM) images revealed particle diameters between 3 and 4 nm, overcoming the sizes observed for the nanoparticles supported on carbon black (catalyst Pd-Ni CB 1:2)...
October 18, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28128086/vesicular-contact-reaction-may-progress-into-erythema-multiforme
#14
REVIEW
Magdalena Czarnecka-Operacz, Dorota Jenerowicz, Joanna Szulczyńska-Gabor, Ewa Teresiak-Mikołajczak, Joanna Szyfter-Harris, Monika Bowszyc-Dmochowska
Dear Editor, Erythema multiforme is considered an acute skin condition, characterized by a self-limiting and sometimes recurrent course. It is regarded as a type IV hypersensitivity reaction associated with certain infections, medications, and other various triggers. Allergic contact dermatitis is in turn a delayed type of induced allergy as a result of cutaneous contact with a specific allergen to which the patient develops specific sensitivity. This type of cutaneous reaction is associated with inflammation manifesting with erythema, edema, and vesicles...
December 2016: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28064036/effects-of-specimen-size-and-mix-ratio-on-the-nickel-migration-behavior-of-landfill-waste-mixed-mortar
#15
M Aminul Haque
Landfill solid waste management system poses the potential source of silent wide-spread heavy metals like nickel poisoning in the entire ecosystem of nearby environment. Nickel containing demolish solid wastes are disposed at landfill zones to a great extent from where nickel migrate into the food chain through the surface water body as well as groundwater. Consequently, nickel exposure may cause different environmental problems. From this sense, it may be an attractive proposal to recycle the waste as a sustainable product...
April 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28059410/enhanced-electrooxidation-of-glucose-at-nano-chitosan-niooh-modified-gc-electrode-fuel-blends-and-hydrocarbon-impurities
#16
Gumaa A El-Nagar, Christina Roth
The current study addresses, for the first time, the promoting effect of some selected fuel blending components, such as methanol (MeOH), ethanol (EtOH) and acetaldehyde (ACTA), on the glucose electrooxidation at a nano-chitosan-NiOOH modified GC electrode (nano-CS-NiOOH/GC). Blending glucose with different molar ratios of MeOH, EtOH and ACTA results in a significant enhancement in the fuel utilization, NiOOH oxidation capacity and turnover number of oxidized glucose molecules compared to the pure fuels. For instance, the use of glucose fuel blends composed of 40% of glucose with 60% of either MeOH, EtOH and ACTA results in 10, 8 and 5 times higher glucose activity of the nano-CS-NiOOH/GC electrode compared to using glucose as a pure fuel, respectively...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28043279/-a-case-of-acute-poisoning-caused-by-ingestion-of-nickel-sulfate
#17
C J Xue, Y J Xia, Q Ye
No abstract text is available yet for this article.
November 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28043274/-high-resolution-ct-features-of-pulmonary-injury-induced-by-acute-nickel-carbonyl-poisoning
#18
S H Jin, Q Zhang, J Wang
No abstract text is available yet for this article.
November 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28029760/evidence-of-sulfate-dependent-anaerobic-methane-oxidation-within-an-area-impacted-by-coalbed-methane-related-gas-migration
#19
Amy L Wolfe, Richard T Wilkin
We evaluated water quality characteristics in the northern Raton Basin of Colorado and documented the response of the Poison Canyon aquifer system several years after upward migration of methane gas occurred from the deeper Vermejo Formation coalbed production zone. Results show persistent secondary water quality impacts related to the biodegradation of methane. We identify four distinct characteristics of groundwater-methane attenuation in the Poison Canyon aquifer: (i) consumption of methane and sulfate and production of sulfide and bicarbonate, (ii) methane loss coupled to production of higher molecular weight (C2+) gaseous hydrocarbons, (iii) patterns of (13)C enrichment and depletion in methane and dissolved inorganic carbon, and (iv) a systematic shift in sulfur and oxygen isotope ratios of sulfate, indicative of microbial sulfate reduction...
February 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/27669512/is-geo-environmental-exposure-a-risk-factor-for-multiple-sclerosis-a-population-based-cross-sectional-study-in-south-western-sardinia
#20
Maria Cristina Monti, Davide Guido, Cristina Montomoli, Claudia Sardu, Alessandro Sanna, Salvatore Pretti, Lorena Lorefice, Maria Giovanna Marrosu, Paolo Valera, Eleonora Cocco
BACKGROUND: South-Western Sardinia (SWS) is a high risk area for Multiple Sclerosis (MS) with high prevalence and spatial clustering; its population is genetically representative of Sardinians and presents a peculiar environment. We evaluated the MS environmental risk of specific heavy metals (HM) and geographical factors such as solar UV exposure and urbanization by undertaking a population-based cross-sectional study in SWS. METHODS: Geochemical data on HM, UV exposure, urbanization and epidemiological MS data were available for all SWS municipalities...
2016: PloS One
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