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https://www.readbyqxmd.com/read/27936402/influence-of-triethyl-phosphate-on-phosphatase-activity-in-shooting-range-soil-isolation-of-a-zinc-resistant-bacterium-with-an-acid-phosphatase
#1
Sandra Story, Robin L Brigmon
Phosphatase-mediated hydrolysis of organic phosphate may be a viable means of stabilizing heavy metals via precipitation as a metal phosphate in bioremediation applications. We investigated the effect of triethyl phosphate (TEP) on soil microbial-phosphatase activity in a heavy-metal contaminated soil. Gaseous TEP has been used at subsurface sites for bioremediation of organic contaminants but not applied in heavy-metal contaminated areas. Little is known about how TEP affects microbial activity in soils and it is postulated that TEP can serve as a phosphate source in nutrient-poor groundwater and soil/sediments...
December 6, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27935969/effects-of-heavy-metals-from-soil-and-dust-source-on-dna-damage-of-the-leymus-chinensis-leaves-in-coal-mining-area-in-northwest-china
#2
Tianxin Li, Minjie Zhang, Zhongming Lu, Uwizeyimana Herman, Dzivaidzo Mumbengegwi, John Crittenden
Air and soil pollution from mining activities has been considered as a critical issue to the health of living organisms. However, few efforts have been made in distinguishing the main pathway of organism genetic damage by heavy metals related to mining activities. Therefore, we investigated the genetic damage of Leymus chinensis leaf cells, the air particulate matter (PM) contents, and concentrations of the main heavy metals (Pb, Cd, Cr, Hg) in soil and foliar dust samples collected from seven experiment points at the core mining area and one control point 20 kilometers away from the core mining area in Inner Mongolia in 2013...
2016: PloS One
https://www.readbyqxmd.com/read/27934213/development-of-correlative-cryo-soft-x-ray-tomography-and-stochastic-reconstruction-microscopy-a-study-of-cholesterol-crystal-early-formation-in-cells
#3
Neta Varsano, Tali Dadosh, Sergey Kapishnikov, Eva Pereiro, Eyal Shimoni, Xueting Jin, Howard S Kruth, Leslie Leiserowitz, Lia Addadi
We have developed a high resolution correlative method involving cryo-soft X-ray tomography (cryo-SXT) and stochastic optical reconstruction microscopy (STORM), which provides information in three dimensions on large cellular volumes at 70 nm resolution. Cryo-SXT morphologically identified and localized aggregations of carbon-rich materials. STORM identified specific markers on the desired epitopes, enabling colocalization between the identified objects, in this case cholesterol crystals, and the cellular environment...
November 16, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27934187/3d-printed-microfluidic-device-with-microporous-mn2o3-modified-screen-printed-electrode-for-real-time-determination-of-heavy-metal-ions
#4
Ying Hong, Meiyan Wu, Guangwei Chen, Ziyang Dai, Yizhou Zhang, Guosong Chen, Xiaochen Dong
Fabricating portable devices for the determination of heavy metal ions is an ongoing challenge. Here, a 3D printing approach was adopted to fabricate a microfluidic electrochemical sensor with the desired shape in which the model for velocity profiles in microfluidic cells was built and optimized by the finite element method (FEM). The electrode in the microfluidic cell was a flexible screen-printed electrode (SPE) modified with porous Mn2O3 derived from manganese containing metal-organic framework (Mn-MOF)...
December 7, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27933457/pristine-but-metal-rich-r%C3%A3-o-sucio-dirty-river-is-dominated-by-gallionella-and-other-iron-sulfur-oxidizing-microbes
#5
Alejandro Arce-Rodríguez, Fernando Puente-Sánchez, Roberto Avendaño, Eduardo Libby, Leonardo Rojas, Juan Carlos Cambronero, Dietmar H Pieper, Kenneth N Timmis, Max Chavarría
Whether the extreme conditions of acidity and heavy metal pollution of streams and rivers originating in pyritic formations are caused primarily by mining activities or by natural activities of metal-oxidizing microbes living within the geological formations is a subject of considerable controversy. Most microbiological studies of such waters have so far focused on acid mine drainage sites, which are heavily human-impacted environments, so it has been problematic to eliminate the human factor in the question of the origin of the key metal compounds...
December 8, 2016: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27932906/environmental-variability-and-heavy-metal-concentrations-from-five-lagoons-in-the-ionian-sea-amvrakikos-gulf-w-greece
#6
Katerina Vasileiadou, Christina Pavloudi, Ioanna Kalantzi, Eugenia T Apostolaki, Giorgos Chatzigeorgiou, Eva Chatzinikolaou, Evangelos Pafilis, Nafsika Papageorgiou, Lucia Fanini, Spyridon Konstas, Nina Fragopoulou, Christos Arvanitidis
BACKGROUND: Coastal lagoons are ecosystems of major importance as they host a number of species tolerant to disturbances and they are highly productive. Therefore, these ecosystems should be protected to ensure stability and resilience. The lagoons of Amvrakikos Gulf form one of the most important lagoonal complexes in Greece. The optimal ecological status of these lagoons is crucial for the well-being of the biodiversity and the economic prosperity of the local communities. Thus, monitoring of the area is necessary to detect possible sources of disturbance and restore stability...
2016: Biodiversity Data Journal
https://www.readbyqxmd.com/read/27932041/source-apportionment-and-health-risk-assessment-of-heavy-metals-in-soil-for-a-township-in-jiangsu-province-china
#7
Yanxue Jiang, Sihong Chao, Jianwei Liu, Yue Yang, Yanjiao Chen, Aichen Zhang, Hongbin Cao
Human activities contribute greatly to heavy metal pollution in soils. Concentrations of 15 metal elements were detected in 105 soil samples collected from a typical rural-industrial town in southern Jiangsu, China. Among them, 7 heavy metals-lead, copper, zinc, arsenic, chromium, cadmium, and nickel-were considered in the health risk assessment for residents via soil inhalation, dermal contact, and/or direct/indirect ingestion. Their potential sources were quantitatively apportioned by positive matrix factorization using the data set of all metal elements, in combination with geostatistical analysis, land use investigation, and industrial composition analysis...
December 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27932039/anaerobic-digestion-of-nitrogen-rich-poultry-manure-impact-of-thermophilic-biogas-process-on-metal-release-and-microbial-resistances
#8
Reshma Anjum, Elisabeth Grohmann, Niclas Krakat
Poultry manure is a nitrogen rich fertilizer, which is usually recycled and spread on agricultural fields. Due to its high nutrient content, chicken manure is considered to be one of the most valuable animal wastes as organic fertilizer. However, when chicken litter is applied in its native form, concerns are raised as such fertilizers also include high amounts of antibiotic resistant pathogenic Bacteria and heavy metals. We studied the impact of an anaerobic thermophilic digestion process on poultry manure...
December 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27931714/host-plant-growth-promotion-and-cadmium-detoxification-in-solanum-nigrum-mediated-by-endophytic-fungi
#9
Abdur Rahim Khan, Ihsan Ullah, Muhammad Waqas, Gun-Seok Park, Abdul Latif Khan, Sung-Jun Hong, Rehman Ullah, Byung Kwon Jung, Chang Eon Park, Shafiq Ur-Rehman, In-Jung Lee, Jae-Ho Shin
Current investigation conducted to evaluate the associated fungal endophyte interactions of a Cd hyper-accumulator Solanum nigrum Korean ecotype under varying concentrations of Cd. Two indole-3-acetic acid (IAA) producing fungal strains, RSF-4L and RSF-6L, isolated from the leaves of S. nigrum, were initially screened for Cd tolerance and accumulation potential. In terms of dry biomass production, the strain RSF-6L showed higher tolerance and accumulation capacity for Cd toxicity in comparison to RSF-4L. Therefore, RSF-6L was applied in vivo to S...
February 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27931390/thermal-effects
#10
Ming Yan, Panyue Zhang, Guangming Zeng
This review focuses on the research literatures published in 2015 relating to topics of thermal effects in water pollution control. This review is divided into the following sections: biological nitrogen and phosphorus removal, wastewater treatment for organic conversion, industrial wastewater treatment, anaerobic digestion of sewage sludge and solid waste, sludge biochar preparation and application, pyrolysis of sewage sludge, reduction heavy metal in sewage sludge and soil, and other issues of wastewater and sludge treatment...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931002/3d-hierarchical-flower-like-nickel-ferrite-manganese-dioxide-toward-lead-ii-removal-from-aqueous-water
#11
Bo Xiang, Dong Ling, Han Lou, Hongbo Gu
A functionalized magnetic nickel ferrite/manganese dioxide (NiFe2O4/MnO2) with 3D hierarchical flower-like and core-shell structure was synthesized by a facile hydrothermal approach and applied for the removal of Pb(II) ions from aqueous solutions. Batch adsorption experiments were conducted to study the effect of solution pH, initial Pb(II) concentration, and dose of absorbents on the Pb(II) removal by NiFe2O4/MnO2. The NiFe2O4/MnO2 nanocomposites showed the fast Pb(II) adsorption performance with the maximum adsorption capacity of 85...
November 4, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27930707/native-phytoremediation-potential-of-urtica-dioica-for-removal-of-pcbs-and-heavy-metals-can-be-improved-by-genetic-manipulations-using-constitutive-camv-35s-promoter
#12
Jitka Viktorova, Zuzana Jandova, Michaela Madlenakova, Petra Prouzova, Vilem Bartunek, Blanka Vrchotova, Petra Lovecka, Lucie Musilova, Tomas Macek
Although stinging nettle (Urtica dioica) has been shown to reduce HM (heavy metal) content in soil, its wider phytoremediation potential has been neglected. Urtica dioica was cultivated in soils contaminated with HMs or polychlorinated biphenyls (PCBs). After four months, up to 33% of the less chlorinated biphenyls and 8% of HMs (Zn, Pb, Cd) had been removed. Bacteria were isolated from the plant tissue, with the endophytic bacteria Bacillus shackletonii and Streptomyces badius shown to have the most significant effect...
2016: PloS One
https://www.readbyqxmd.com/read/27929414/pb-2-effects-on-growth-lipids-and-protein-and-dna-profiles-of-the-thermophilic-bacterium-thermus-thermophilus
#13
Barbara Nicolaus, Annarita Poli, Paola Di Donato, Ida Romano, Giusi Laezza, Alessia Gioiello, Sergio Ulgiati, Florinda Fratianni, Filomena Nazzaro, Pierangelo Orlando, Stefano Dumontet
Extremophiles are organisms able to thrive in extreme environmental conditions and some of them show the ability to survive high doses of heavy metals thanks to defensive mechanisms provided by primary and secondary metabolic products, i.e., extremolytes, lipids, and extremozymes. This is why there is a growing scientific and industrial interest in the use of thermophilic bacteria in a host of tasks, from the environmental detoxification of heavy metal to industrial activities, such as bio-machining and bio-metallurgy...
December 6, 2016: Microorganisms
https://www.readbyqxmd.com/read/27928750/phytoextraction-of-arsenic-contaminated-soil-with-pteris-vittata-in-henan-province-china-comprehensive-evaluation-of-remediation-efficiency-correcting-for-atmospheric-depositions
#14
Mei Lei, Xiaoming Wan, Guanghui Guo, Junxing Yang, Tongbin Chen
Research on the appropriate method for evaluating phytoremediation efficiency is limited. A 2-year field experiment was conducted to investigate phytoremediation efficiency using the hyperaccumulator Pteris vittata on an arsenic (As)-contaminated site. The remediation efficiency was evaluated through the removal rate of As in soils and extraction rate of heavy metals in plants. After 2 years of remediation, the concentration of total As in soils decreased from 16.27 mg kg(-1) in 2012 to 14.58 mg kg(-1) in 2014...
December 7, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27928531/a-simple-and-fast-method-based-on-new-magnetic-ion-imprinted-polymer-as-a-highly-selective-sorbent-for-preconcentration-and-determination-of-cadmium-in-environmental-samples
#15
Zahra Panjali, Ali Akbar Asgharinezhad, Homeira Ebrahimzadeh, Niloofar Jalilian, Rasoul Yarahmadi, Seyed Jamaleddin Shahtaheri
BACKGROUND: The analysis of heavy metals at trace level is one of the main toxicologists concern, due to their vital rules in human`s life. Cadmium is one of these toxic heavy metals, which released to the environment from various industries. METHODS: In order to determine Cd (II) ions in various matrices magnetic ion-imprinted polymer (IIP) method has been developed and applied. This nano-sorbent has been synthesized by coating an IIP compound on Fe3O4 nanoparticles core to achieve highest surface area...
August 2016: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/27925752/emergent-structural-mechanisms-for-high-density-collective-motion-inspired-by-human-crowds
#16
Arianna Bottinelli, David T J Sumpter, Jesse L Silverberg
Collective motion of large human crowds often depends on their density. In extreme cases like heavy metal concerts and black Friday sales events, motion is dominated by physical interactions instead of conventional social norms. Here, we study an active matter model inspired by situations when large groups of people gather at a point of common interest. Our analysis takes an approach developed for jammed granular media and identifies Goldstone modes, soft spots, and stochastic resonance as structurally driven mechanisms for potentially dangerous emergent collective motion...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27923372/community-acquired-meningitis-caused-by-a-cg86-hypervirulent-klebsiella-pneumoniae-strain-first-case-report-in-the-caribbean
#17
Bénédicte Melot, Sylvain Brisse, Sébastien Breurec, Virginie Passet, Edith Malpote, Isabelle Lamaury, Guillaume Thiery, Bruno Hoen
BACKGROUND: Community-acquired bacterial meningitis due to Klebsiella pneumoniae has mainly been described in Southeast Asia and has a poor prognosis. Severe invasive infections caused by K. pneumoniae, including meningitis, are often due to hypervirulent strains (hvKP), which are characterized by capsular serotypes K1 and K2, a gene responsible for hypermucoviscosity, and the cluster for synthesis of the siderophore aerobactin. CASE PRESENTATION: A 55 year old man with a history of essential hypertension, benign prostate hyperplasia, hyperlipidemia, obstructive sleep apnea, and chronic alcoholism was admitted for meningitis due to Klebsiella pneumoniae with a wild-type susceptibility profile...
December 7, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27923163/waste-conversion-into-high-value-ceramics-carbothermal-nitridation-synthesis-of-titanium-nitride-nanoparticles-using-automotive-shredder-waste
#18
Mohannad Mayyas, Farshid Pahlevani, Samane Maroufi, Zhao Liu, Veena Sahajwalla
Environmental concern about automotive shredder residue (ASR) has increased in recent years due to its harmful content of heavy metals. Although several approaches of ASR management have been suggested, these approaches remain commercially unproven. This study presents an alternative approach for ASR management where advanced materials can be generated as a by-product. In this approach, titanium nitride (TiN) has been thermally synthesized by nitriding pressed mixture of automotive shredder residue (ASR) and titanium oxide (TiO2)...
December 3, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27922674/2-hydroxycinnamaldehyde-induces-apoptosis-through-hsf1-mediated-bag3-expression
#19
Hai-Anh Nguyen, Soo-A Kim
BAG3, a member of BAG co-chaperone family, is induced by stressful stimuli such as heat shock and heavy metals. Through interaction with various binding partners, BAG3 is thought to play a role in cellular adaptive responses against stressful conditions in normal and neoplastic cells. 2'-Hydroxycinnamaldehyde (HCA) is a natural derivative of cinnamaldehyde and has antitumor activity in various cancer cells. In the present study, for the first time, we identified that HCA induced BAG3 expression and BAG3-mediated apoptosis in cancer cells...
December 6, 2016: International Journal of Oncology
https://www.readbyqxmd.com/read/27921247/erratum-to-removing-heavy-metals-from-isfahan-composting-leachate-by-horizontal-subsurface-flow-constructed-wetland
#20
Reza Bakhshoodeh, Nadali Alavi, Amir Soltani Mohammadi, Hossein Ghanavati
No abstract text is available yet for this article.
December 6, 2016: Environmental Science and Pollution Research International
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