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https://www.readbyqxmd.com/read/27915389/insertion-sequences-enrichment-in-extreme-red-sea-brine-pool-vent
#1
Ali H A Elbehery, Ramy K Aziz, Rania Siam
Mobile genetic elements are major agents of genome diversification and evolution. Limited studies addressed their characteristics, including abundance, and role in extreme habitats. One of the rare natural habitats exposed to multiple-extreme conditions, including high temperature, salinity and concentration of heavy metals, are the Red Sea brine pools. We assessed the abundance and distribution of different mobile genetic elements in four Red Sea brine pools including the world's largest known multiple-extreme deep-sea environment, the Red Sea Atlantis II Deep...
December 3, 2016: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27915147/highly-sensitive-optical-interferometric-technique-reveals-stress-dependent-instantaneous-nanometric-growth-fluctuations-of-chinese-chive-leaf-under-heavy-metal-stress
#2
Kokge Thilini Kanchana Muthumali DeSilva, Uma Maheswari Rajagopalan, Hirofumi Kadono
Plant growth apart from being a complex and highly dynamic is dependent on its immediate environment. Leaf expansion measurements using Statistical Interferometry Technique, a sensitive interferometric technique at nanometric accuracy and at sub-second levels revealed the presence of characteristic nanometric intrinsic fluctuations [Plant Biotechnology 31, 195 (2014)]. In this paper, we demonstrate that the nanometric intrinsic fluctuations are sensitive enough that they change under exposure of heavy metals, essential micronutrient zinc and non-essential element cadmium, at relatively low concentrations in the leaves of Chinese chive (Allium tuberosum)...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27915146/differential-sensitivity-to-cadmium-of-immunomarkers-measured-in-hemocyte-subpopulations-of-zebra-mussel-dreissena-polymorpha
#3
Lauris Evariste, Damien Rioult, Pauline Brousseau, Alain Geffard, Elise David, Michel Auffret, Michel Fournier, Stéphane Betoulle
Increasing discharge of industrial wastes into the environment results in pollution transfer towards hydrosystems. These activities release heavy metals such as cadmium, known as persistent pollutant that is accumulated by molluscs and exercise immunotoxicological effects. Among molluscs, the zebra mussel, Dreissena polymorpha constitutes a suitable support for freshwater ecotoxicological studies. In molluscs, homeostasis maintain is ensured in part by hemocytes that are composed of several cell populations involved in multiple physiological processes such as cell-mediated immune response or metal metabolism...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27915140/two-zinc-aminoclays-in-vitro-cytotoxicity-assessment-in-hela-cells-and-in-vivo-embryotoxicity-assay-in-zebrafish
#4
Hang-Suk Chun, Duckshin Park, Song Eun Lim, Kwang-Hun Jeong, Ji-Seon Park, Han-Jin Park, Shinyoung Kang, Kyoung Suk Kang, Hyun Gyu Park, Ha-Rim An, Yun Suk Huh, Young-Chul Lee
Two zinc-aminoclays [ZnACs] with functionalized primary amines [(-CH2)3NH2] were prepared by a simple sol-gel reaction using cationic metal precursors of ZnCl2 and Zn(NO3)2 with 3-aminopropyl triethoxysilane [APTES] under ambient conditions. Due to the facile interaction of heavy metals with primary amine sites and Zn-related intrinsic antimicrobial activity, toxicity assays of ZnACs nanoparticles (NPs) prior to their environmental and human-health applications are essential. However, such reports remain rare...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27915099/foliar-heavy-metal-uptake-toxicity-and-detoxification-in-plants-a-comparison-of-foliar-and-root-metal-uptake
#5
REVIEW
Muhammad Shahid, Camille Dumat, Sana Khalid, Eva Schreck, Tiantian Xiong, Nabeel Khan Niazi
Anthropologic activities have transformed global biogeochemical cycling of heavy metals by emitting considerable quantities of these metals into the atmosphere from diverse sources. In spite of substantial and progressive developments in industrial processes and techniques to reduce environmental emissions, atmospheric contamination by toxic heavy metals and associated ecological and health risks are still newsworthy. Atmospheric heavy metals may be absorbed via foliar organs of plants after wet or dry deposition of atmospheric fallouts on plant canopy...
November 24, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27914858/heavy-metal-contamination-in-sandy-beach-macrofauna-communities-from-the-rio-de-janeiro-coast-southeastern-brazil
#6
Tatiana M B Cabrini, Carlos A M Barboza, Viviane B Skinner, Rachel A Hauser-Davis, Rafael C Rocha, Tatiana D Saint'Pierre, Jean L Valentin, Ricardo S Cardoso
We evaluated concentrations of eight heavy metals Cr, Zn, Pb, Ni, Cu, Cd, Co and V, in tissues of representative macrofauna species from 68 sandy beaches from the coast of Rio de Janeiro state. The links between contamination levels and community descriptors such as diversity, evenness, density and biomass, were also investigated. Metal concentrations from macrofaunal tissues were compared to maximum permissible limits for human ingestion stipulated by the Brazilian regulatory agency (ANVISA). Generalized linear models (GLM's) were used to investigate the variability in macrofauna density, richness, eveness and biomass in the seven different regions...
November 30, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27914349/effects-of-clay-minerals-hydroxides-and-timing-of-dissolved-organic-matter-addition-on-the-competitive-sorption-of-copper-nickel-and-zinc-a-column-experiment
#7
Yasser Refaey, Boris Jansen, John R Parsons, Pim de Voogt, Simone Bagnis, Adriaan Markus, Abdel-Hamid El-Shater, Abdel-Aziz El-Haddad, Karsten Kalbitz
Infiltration of heavy metal (HM) polluted wastewater can seriously compromise soil and groundwater quality. Interactions between mineral soil components (e.g. clay minerals) and dissolved organic matter (DOM) play a crucial role in determining HM mobility in soils. In this study, the influence of the timing of addition of DOM, i.e. concurrent with or prior to HMs, on HM mobility was explored in a set of continuous flow column experiments using well defined natural soil samples amended with goethite, birnessite and/or smectite...
November 30, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27914081/negative-staining-and-transmission-electron-microscopy-of-bacterial-surface-structures
#8
Matthias Mörgelin
Negative staining is an essential and versatile staining technique in transmission electron microscopy that can be employed for visualizing bacterial cell morphology, size, and surface architecture at high resolution. Bacteria are usually transferred by passive electrostatic adsorption from suspensions in physiological saline onto suitable hydrophilic support films on electron microscopic grids. There they are contrasted, or "stained," by heavy metal ions in solution such as tungsten, uranyl, molybdate, or vanadate compounds...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27913956/pollution-characteristics-and-ecological-risk-of-heavy-metals-in-ballast-tank-sediment
#9
Daolun Feng, Xiaofei Chen, Wen Tian, Qun Qian, Hao Shen, Dexiang Liao, Baoyi Lv
This study was conducted to illustrate the contents and potential ecological risk of heavy metals in ballast tank sediment. Ballast sediment samples were collected from six ships during their stay in shipyard, and the heavy metals were determined by inductive coupled plasma emission spectrometer. Results showed that high concentrations of heavy metals were detected in all six sediment samples following the order: Zn > Cu > Pb > Cr > As > Cd > Hg. The geoaccumulation index explained the average pollution degree of heavy metals decreased as the following: Zn > Pb > Cu > As > Cr > Hg, and the environmental risk indices suggested that concentration found of Zn, Pb, and Cu might be highly toxic to aquatic organisms...
December 2, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27912988/sequential-electrodialytic-recovery-of-phosphorus-from-low-temperature-gasification-ashes-of-chemically-precipitated-sewage-sludge
#10
Raimon Parés Viader, Pernille Erland Jensen, Lisbeth M Ottosen, Jesper Ahrenfeldt, Henrik Hauggaard-Nielsen
Phosphorus recycling from secondary materials like sewage sludge ashes offers an alternative to mining of phosphates from primary resources and a mean to counteract the current phosphorous rock depletion concern. A separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. Previously, more than 80% of P was recovered from incineration sewage sludge ashes using a two-compartment electrodialytic cell. In contrast, the recovery was below 30% for ashes from low-temperature gasification using the same setup...
November 29, 2016: Waste Management
https://www.readbyqxmd.com/read/27912914/distribution-and-source-analysis-of-heavy-metals-in-soils-and-sediments-of-yueqing-bay-basin-east-china-sea
#11
Xiaohui Yang, Pengbao Wu, Aijing Yin, Huan Zhang, Ming Zhang, Chao Gao
Concentrations of heavy metals in coastal soils, stream sediments and intertidal sediments of Yueqing Bay basin were analyzed to study their distribution and trace the possible sources. According to various single- and multi-index methods, heavy metal enrichment, especially for Cu, Zn, Cr and Ni in stream sediments, should draw environmental concern. Controlling factors such as inorganic scavengers, organic matter, sample grain size and hydrodynamic conditions were identified to influence the transportation and distribution of metals within coastal soils and sediments...
November 29, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27912188/bacillus-flexus-strain-as-12-a-new-arsenic-transformer-bacterium-isolated-from-contaminated-water-resources
#12
Mohammad Ahmadi Jebeli, Afshin Maleki, Mohammad Ali Amoozegar, Enayatollah Kalantar, Hassan Izanloo, Fardin Gharibi
A total of 14 arsenic-resistant bacteria were isolated from an arsenic-contaminated travertine spring water in the central district of Qorveh county, Kurdistan Province, Iran. One of strains designated As-12 was selected for further investigation because of its ability to transform arsenic. The strain was identified by cultural, morphological and biochemical tests, and 16S rRNA gene sequencing. Finally, the growth characteristics of the isolate were investigated in a chemically defined medium which included varied ranges of environmental factors such as pH, temperature and salinity...
November 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/27912116/application-of-melatonin-loaded-poly-n-isopropylacrylamide-hydrogel-particles-to-reduce-the-toxicity-of-airborne-pollutes-to-raw264-7-cells
#13
Wenjing Zhang, Pengfei Jiang, Jin Chen, Chaonan Zhu, Zhengwei Mao, Changyou Gao
The adverse effect of airborne PM2.5 pollutes on human beings and the environment, most likely due to heavy metal leaching, has received extensive attention recently. It is urgently required to develop a simple and effective method to suppress the toxicity of PM2.5 pollutes. In this study, the heavy metal content of PM2.5 pollutes around Zhejiang university were firstly identified. Their cytotoxicity was confirmed, by inducing significantly enhanced intracellular reactive oxygen species level. Poly(N-isopropylacrylamide) (PNIPAM) submicron hydrogel particles with tunable crosslinking densities and thermo-responsive swelling/shrinking properties were then prepared by adjusting the crosslinking density...
November 22, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27911941/copper-oxide-nanoparticles-impact-several-toxicological-endpoints-and-cause-neurodegeneration-in-caenorhabditis-elegans
#14
Michael J Mashock, Tyler Zanon, Anthony D Kappell, Lisa N Petrella, Erik C Andersen, Krassimira R Hristova
Engineered nanoparticles are becoming increasingly incorporated into technology and consumer products. In 2014, over 300 tons of copper oxide nanoparticles were manufactured in the United States. The increased production of nanoparticles raises concerns regarding the potential introduction into the environment or human exposure. Copper oxide nanoparticles commonly release copper ions into solutions, which contribute to their toxicity. We quantified the inhibitory effects of both copper oxide nanoparticles and copper sulfate on C...
2016: PloS One
https://www.readbyqxmd.com/read/27911906/adsorptive-removal-of-toxic-chromium-from-waste-water-using-wheat-straw-and-eupatorium-adenophorum
#15
Dagang Song, Kaiwen Pan, Akash Tariq, Azizullah Azizullah, Feng Sun, Zilong Li, Qinli Xiong
Environmental pollution with heavy metals is a serious issue worldwide posing threats to humans, animals and plants and to the stability of overall ecosystem. Chromium (Cr) is one of most hazardous heavy metals with a high carcinogenic and recalcitrant nature. Aim of the present study was to select low-cost biosorbent using wheat straw and Eupatorium adenophorum through simple carbonization process, capable of removing Cr (VI) efficiently from wastewater. From studied plants a low cost adsorbent was prepared for removing Cr (VI) from aqueous solution following very simple carbonization method excluding activation process...
2016: PloS One
https://www.readbyqxmd.com/read/27911535/enhanced-spin-orbit-torque-via-modulation-of-spin-current-absorption
#16
Xuepeng Qiu, William Legrand, Pan He, Yang Wu, Jiawei Yu, Rajagopalan Ramaswamy, Aurelien Manchon, Hyunsoo Yang
The magnitude of spin-orbit torque (SOT), exerted to a ferromagnet (FM) from an adjacent heavy metal (HM), strongly depends on the amount of spin current absorbed in the FM. We exploit the large spin absorption at the Ru interface to manipulate the SOTs in HM/FM/Ru multilayers. While the FM thickness is smaller than its spin dephasing length of 1.2 nm, the top Ru layer largely boosts the absorption of spin currents into the FM layer and substantially enhances the strength of SOT acting on the FM. Spin-pumping experiments induced by ferromagnetic resonance support our conclusions that the observed increase in the SOT efficiency can be attributed to an enhancement of the spin-current absorption...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27910770/addition-of-zeolites-to-improve-the-functional-characteristics-of-the-hen-of-the-wood-or-maitake-medicinal-mushroom-grifola-frondosa-agaricomycetes
#17
Jovana Vunduk, Anita Klaus, Maja Kozarski, Radovan Dordevic, Zoran Miladinovic, Ljubinko Jovanovic, Miomir Niksic, Leonardus Johannes Lambertus Donatus Van Griensven
Kaolinite and the modified natural zeolite minazel plus (M+) were used as supplements in substrate used for the production of the medicinal mushroom Grifola frondosa. Growth stimulation, expressed as yield and biological efficiency, was observed when M+ (1%) was added. The production cycle was shortened by half as a result of the zeolites' ion-exchange ability, stimulation of enzyme activity, and water retain capacity. Inductively coupled plasma optical emission spectrometry of fruiting bodies showed the absence of heavy metals (arsenic, cadmium, and lead), whereas the concentration of calcium increased greatly and the concentrations of iron, magnesium, and zinc increased moderately under the influence of M+...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27910529/development-of-a-beam-ion-velocity-detector-for-the-heavy-ion-beam-probe
#18
P J Fimognari, T P Crowley, D R Demers
In an axisymmetric plasma, the conservation of canonical angular momentum constrains heavy ion beam probe (HIBP) trajectories such that measurement of the toroidal velocity component of secondary ions provides a localized determination of the poloidal flux at the volume where they originated. We have developed a prototype detector which is designed to determine the beam angle in one dimension through the detection of ion current landing on two parallel planes of detecting elements. A set of apertures creates a pattern of ion current on wires in the first plane and solid metal plates behind them; the relative amounts detected by the wires and plates determine the angle which beam ions enter the detector, which is used to infer the toroidal velocity component...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910441/ultra-high-vacuum-compatible-preparation-chain-for-intermetallic-compounds
#19
A Bauer, G Benka, A Regnat, C Franz, C Pfleiderer
We report the development of a versatile material preparation chain for intermetallic compounds, which focuses on the realization of a high-purity growth environment. The preparation chain comprises an argon glovebox, an inductively heated horizontal cold boat furnace, an arc melting furnace, an inductively heated rod casting furnace, an optically heated floating-zone furnace, a resistively heated annealing furnace, and an inductively heated annealing furnace. The cold boat furnace and the arc melting furnace may be loaded from the glovebox by means of a load-lock permitting to synthesize compounds starting with air-sensitive elements while handling the constituents exclusively in an inert gas atmosphere...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909928/erratum-to-cost-effective-enhanced-iron-bioavailability-in-rice-grain-grown-on-calcareous-soil-by-sulfur-mediation-and-its-effect-on-heavy-metals-mineralization
#20
Pia Muhammad Adnan Ramzani, Muhammad Khalid, Shazia Anjum, Waqas-Ud-Din Khan, Shafaqat Ali, Fakhir Hannan, Muhammad Iqbal
No abstract text is available yet for this article.
December 2, 2016: Environmental Science and Pollution Research International
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