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2,118 results for “Metal”
Data from: Trace metals in nectar of important urban pollinator forage plants: A direct exposure risk to pollinators and nectar-feeding animals in cities
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Measurements of heavy metals in the moss Orthotrichum lyellii collected using community science in the Duwamish Valley, Seattle, Washington, U.S.A.
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Molecular dynamics simulations in: High-resolution structures with bound Mn2+ and Cd2+ map the metal import pathway in an Nramp transporter
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Co-occurrence of antimicrobials and metals in swine manure as potential drivers of antimicrobial resistance in the environment
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Oxidation of L-leucine amino acid initiated by HO● radical - Are transition metal ions an enhancement factor?
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Data from: Reactive high-spin iron(IV)-oxo sites through dioxygen activation in a metal–organic framework
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Carotenoid- but not melanin-based plumage coloration is negatively related to metal exposure and proximity to the road in an urban songbird
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3D microCT of lithium metal battery after charge and discharge
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Trace Metal Content of Community Garden Soils in Metro Phoenix, AZ
Gardens are established in urban areas as a way to establish natural spaces and fresh food in low affluence communities. A potential problem of growing food in cities is that high levels of heavy metals can exist in soils from proximity to industries and longterm agriculture, which can be taken up my plants. This research measured soil and plant Pb and Cd, two of the most prolific and high concern metals, in order to determine if toxic levels beyond EPA standards of metals exist in Phoenix metro garden soils.
Soil trace metals: Effects of Various Nutrients and Water on Vegetation
This experiment was conducted within the fenced areas of fields A, B, C, and D. The purpose of this experiment was to determine the effect of various nutrients on vegetation. There were eight different nutrients and a control. The different nutrients were N, P, K, Ca, Mg, Na, H2O, and a combination of trace metals. There were 36 plots in each field, 4 replicates of the 9 treatment levels. The plots were 1 meter by 4 meters and were laid out in a 4 by 9 grid. The grid was divided into 4 quarters and treatments were assigned with a randomized block design.
SAMI3 simulations of ionospheric metallic layers at Arecibo II
<p>data files and supporting material for the paper 'SAMI3 simulations of ionospheric metallic layers at Arecibo'</p>
Modeling the Impact of Metallic Ion Layers on Equatorial Spread F with SAMI3/ESF
<p>data for paper submitted to GRL entitled</p> <p>Modeling the Impact of Metallic Ion Layers on Equatorial Spread F with SAMI3/ESF</p>
Dataset related to publication "In silico evaluation of the thermal stress induced by MRI switched gradient fields in patients with metallic hip implant"
<p>The datasets reported in the figures of the article "In silico evaluation of the thermal stress induced by MRI switched gradient fields in patients with metallic hip implant", published on Phys. Med. Biol. 64 245006, 2019.</p> <p>This work focuses on the in silico evaluation of the energy deposed by MRI switched gradient fields<br> in bulk metallic implants and the consequent temperature increase in the surrounding tissues. The results show that the gradient coils can generate local increases of temperature up to some kelvin when acting without radiofrequency excitation. Hence, their contribution in general should not be disregarded when evaluating patients’ safety.</p>
IronRefs database of bibliographic data on remediation of contaminated environmental materials using zerovalent metals such as iron (ZVI)
<p>Database of bibliographic data for publications (journal articles, reports, patents, presentation abstracts, etc.) on the use of zerovalent metals (ZVMs)—especially zerovalent iron (ZVI)—for remediation or treatment of contaminated environmental materials (mainly groundwater, but also wastewater, soil, and sediment).</p> <p>The data were compiled and curated between 1996 and 2011 by members of the research group of Professor Paul G. Tratnyek at the Oregon Graduate Institute in Beaverton, Oregon, USA. At the beginning, the field was very small and most new work appeared first in gray-literature, so manual curation of the database made it a uniquely-valuable resource for the community.</p> <p>The original list of references was replaced with a searchable online database in 1998, which was named the “IronRefs” database and made available to all at <a href="http://cgr.ebs.ogi.edu/ironrefs/">http://cgr.ebs.ogi.edu/ironrefs/</a>. The database was updated periodically until 2011, by which time the field had grown so large that it was no longer practical to keep up with all of the new publications.</p> <p>The early development and impact of the IronRefs database was documented when it reached 500 records (Tratnyek, 2002) and when it reached 1000 records (Schneider et al., 2008). The former was published as an article in Groundwater Monitoring and Remediation (DOI: 10.1111/j.1745-6592.2002.tb00757.x) and the latter was given as a poster at the 6th International Conference on Chlorinated and Recalcitrant Compounds, Monterey, CA (PDF included here).</p> <p>In 2019, the server containing IronRefs was retired, so this unique resource became unavailable. In place of IronRefs, we provide here all of the data (2000+ records) in two tagged-field formats that are compatible with most bibliographic data management software: an EndNote compressed library (.enlx) and an RIS file (.ris). We also exported the data to a tab-delimited text file and provide that in .csv and .txt formats.</p> <p>Note that no new records were added to the IronRefs database after about mid-2011, so the value of the dataset provided here is largely historical. There are many newer publications that are relevant, and the literature on this topic continues to grow rapidly as of 2020.</p>
Massive donors in interacting binaries: impact of metallicity
<p>Input files needed to reproduce the simulations as well as output MESA history files (i.e. stellar tracks) to paper "Massive donors in interacting binaries: impact of metallicity". MESA version r11554.</p> <p>Output history files are provided for the models with the chosen reference set of input physical assumptions. History files from other models discussed in the paper can be provided upon request. </p> <p> </p>
Supplementary Data for "Tuning the Redox Activity of Metal–Organic Frameworks for Enhanced, Selective O2 Binding: Design Rules and Ambient Temperature O2 Chemisorption in a Cobalt–Triazolate Framework"
<p>Supplementary dataset to support "Tuning the Redox Activity of Metal–Organic Frameworks for Enhanced, Selective O<sub>2</sub> Binding: Design Rules and Ambient Temperature O<sub>2</sub> Chemisorption in a Cobalt–Triazolate Framework"</p>
Preparation of Phosphorus doping modification of porous boron nitride and its adsorption characteristics for heavy metals in flue gas
Boron nitride, known as "white graphene", have attracted extensive attention to the fields of adsorption, catalysis and hydrogen storage due to their excellent chemical properties. In this paper, the phosphorus doped boron nitride material (P-BN), was successfully prepared by red phosphorus as a dopant for the preparation of porous boron nitride precursors, the phosphorus content in P-BN was adjusted by the addition rate of phosphorus. The tendency of specific surface area of P-BN increased firstly and then decreased with the increasing of phosphorus addition rate, and the maximum specific surface area was 837.08m2/g when the phosphorus addition rate was 0.50. The P-BN, prepared by the experimental, used as an adsorbent had been proved its adsorption capacity for heavy metal flue gas. In particular, P-BN had a stronger adsorption selectivity for Zinc compared with other heavy metals, and the adsorption capacity of P-BN for Zinc reached 5~38 times higher than that of other heavy metals. However, the maximum adsorption capacities of P-BN for Zinc and Copper in the single heavy metal atmosphere were 69.45mg/g and 53.80mg/g, respectively.
Bottom-up synthesis of multi-metal micro/nano motors
In the past two decades, micro/nano motors have experienced rapid development, especially in environment remediation, biomedical field, and cargo delivery. In this article, we synthesize a micro-nano motor composed of a variety of materials through the bottom-up method (template electrodeposition), and we use different functional layers and catalytic layers in the synthesis process. With this method, we test the motion effects of different materials in solution. In order to better analyze the influence of different factors on the motor movement effect, we mainly selected three factors to analyse from different aspects, respectively, hydrogen peroxide concentration, surfactant type, surfactant concentration. According to these statistical data, the movement efficiency and diversity of micromotors in different environments will be achieved.
Data from: Paleolimnological assessment of wildfire-derived atmospheric deposition of trace metal(loid)s and major ions to subarctic lakes (Northwest Territories, Canada)
<p>Wildfires release terrestrial elements to the atmosphere as aerosols, and these events are becoming more frequent and intense in the Arctic boreal forest as the climate is warming. We quantified the impact of atmospheric deposition of aerosols from local wildfires on metal(loid) fluxes using macroscopic charcoal accumulation rates, historical fire mapping, and element concentrations in <sup>210</sup>Pb‐dated lake sediment from five subarctic lakes with small catchments. Lake sediments showed small but significant increases in fluxes (median = 5–10%) for 22 trace metals, metalloids, or major ions following fire events. The impact of wildfire aerosols on element fluxes was mostly due to short‐term (≤2 years) increasing sedimentation rate (6 ± 41% increase), whereas sediment element concentrations were not strongly impacted. Wildfire‐associated deposition to lake sediments was mainly composed of Ca, Al, Fe, Mg, K, Mn, and Na, which are major constituents of ash from burned biomass, but changes in sediment flux were greatest for Sb, As, Ni, Ba, Mn, Mo, and Sr compared to pre‐disturbance conditions. Compared to anthropogenic sources of pollution, wildfire‐associated atmospheric fluxes of metal contaminants to the lakes (e.g., Hg, Pb, As, Sb, and Cd) were low. This study provides quantitative estimates of wildfire impacts on atmospheric geochemical fluxes to subarctic lakes, which can be used for modeling larger‐scale impacts under changing fire regimes.</p>
Hierarchically Porous Reduced Graphene Oxide Coated with Metal-Organic Framework HKUST-1 for Enhanced Hydrogen Gas Affinity
<p>Metal organic frameworks (MOFs) are crystalline porous materials with interconnected pores and have been actively explored for various gas storage, separation and conversion applications due to their structural tunability. While the micropores (<2 nm) in MOFs are essential for increased gas affinity, these small pores significantly decrease the mass transport kinetics. One way to address this challenge is to develop hierarchically porous MOFs with interconnected micro-, meso- and macropores. Whereas these MOFs can be formed by using soft/hard templates or by creating pores through post-modification, it can also be achieved by growing MOFs on structural templates such as porous carbons i.e., reduced graphene oxide. The latter strategy can enable the introduction of hierarchical porosity, while creating a synergistic effect to simultaneously improve both mechanical property and gas affinity by creating pores at the interface. In this direction, we demonstrated that the coating of HKUST-1 onto a porous reduced graphene oxide (HRGO) led to the formation of a hierarchically porous structure, namely, HKUST-1@HRGO with increased affinity towards H2 gas. While the isosteric heats of adsorption (<em>Q</em><sub>st</sub>) values for H2 were found to be 7.7, 6.9 and 6.7 kJ mol<sup>-1</sup> for HRGO, HKUST-1 and the physical mixture of HKUST-1 and HRGO, respectively, at zero coverage, that of HKUST-1@HRGO composite revealed a significant increase up to 9.26 kJ mol<sup>-1 </sup>,<sup> </sup>thus clearly demonstrating not only the synergetic effect between HKUST-1 and the reduced graphene oxide and also the critical role interfacial pores as high affinity binding sites.</p> <p> </p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.