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1,491 results for “Ione”
Nitrogen Deposition to an Alberta Bog as Measured with Mixed-bed Ion Exchange Resin Tube Collectors, 2011-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). Resin tubes filled with mixed-bed ion exchange resin were swapped in and out at each collection/deployment date (mid-May and mid-October of each year). Upon collection, resins were extracted with 1M KI and analyzed for inorganic N concentrations. Deposition of NH4 +-N, NO3 --N, and DIN averaged 187 ± 11, 237 ± 13, and 426 ± 19 μg m-2 da-1, corresponding to 0.68 ± 0.04, 0.87 ± 0.05, and 1.55 ± 0.07 kg N ha-1 yr-1, with no significant differences between open and throughfall collectors for any of the three measured parameters (p >= 0.63). Deposition of NH4 +-N was significantly higher during the growing season (averaging 240 μg m-2 da-1) than during the winter months (averaging 121 μg m-2 da-1) (p = 0.0004), while NO3 --N and DIN deposition did not differ significantly between winter and summer (p = 0.06 and 0.13, respectively).
Nitrogen Deposition to an Alberta Poor Fen as Measured with Mixed-bed Ion Exchange Resin Tube Collectors, 2011-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). Resin tubes filled with mixed-bed ion exchange resin were swapped in and out at each collection/deployment date (mid-May and mid-October of each year). Upon collection, resins were extracted with 1M KI and analyzed for inorganic N concentrations. Over all ion exchange resin tube collection dates, deposition of NH4+-N, NO3--N, and dissolved inorganic N (DIN; NH4+-N + NO3--N) averaged 240 ± 29, 318 ± 27, and 557 ± 41 µg m-2 da-1, values that are equivalent to 0.87 ± 0.10, 1.16 ± 0.10, and 2.03 ± 0.15 kg N ha-1 yr-1. While NH4+-N deposition was higher in the growing season than in non-growing season (p = 0.0006), NO3--N deposition was higher in non-growing season than during the growing season (p = 0.0052), with the net result being no seasonal difference in DIN deposition (p = 0.6428).
Summary of lysimeter ion concentrations at Coweeta Watershed One at the Coweeta Hydrologic Laboratory from 1985 to 1988
None provided by researcher.
McMurdo Dry Valleys Major Ion Concentrations for Glacier Ice, Snow, and Melt Water Samples 1993-1997
The chemistry of various glaciers (Canada, Commonwealth, Howard, Suess, Taylor) in Taylor Valley was measured for the following analytes between 1993 and 1997: Alkalinity, Ca, Cl, F, K, Mg, Na, NO3, Si, and SO4.
McMurdo Dry Valleys Gas, Tritium, Stable Isotope, and Major Ion data for lake waters: 2005-2006 Antarctic Season
Data of dissolved gas, tritium, stable isotopes, and major ion for Lake Vanda (Wright Valley), Lake Fryxell (Taylor Valley), Lake Hoare (Taylor Valley), and Lake Joyce (Pearce Valley): 2005-2006 Antarctic Season
2017-2018 Oahu Precipitation Isotopes and Ions
<p>Precipitation collected around Oahu, Hawaii from 2017-2018 across 20 stations. Data includes station locations, precision of measurements, ion concentrations, and stable isotopes.</p>
Data set related to the manuscript "Ionic liquids under confinement: From systematic variations of the ion and pore sizes towards an understanding of structure and dynamics in complex porous carbons"
<p>Graphical files in the agr format for all the figures in the main text of the manuscript entitled "Ionic liquids under confinement: From systematic variations of the ion and pore sizes towards an understanding of structure and dynamics in complex porous carbons" (10.1021/acsami.9b16740). Example of input file for one of the systems simulated.</p>
Experimental data for "Development of Experimental Techniques for Parameterization of Multi-scale Lithium-ion Battery Models"
<p>This dataset is for the validation data in Chen et al. (2020). It contains data for three different LG M50 cells undergoing an experiment in which the cells are charged in a constant-current/constant-voltage fashion and discharge at a constant current for different C-rates (C/10, C/2, 1C and 1.5C). Apart from the current and voltage, the temperatures of the cell surface and the thermal chamber in which they are cycled is recorded too.</p> <p><strong>References:</strong></p> <p>Chang-Hui Chen <em>et al</em> 2020 <em>J. Electrochem. Soc.</em> <strong>167</strong> 080534 (<a href="https://doi.org/10.1149/1945-7111/ab9050">https://doi.org/10.1149/1945-7111/ab9050</a>)</p>
3D metabolic profiles acquired by a Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS)
<p>Dataset for "Spatially resolved 3D metabolomic profiling in tissues"</p> <p>The Dataset has 6 subdata of TOF-SIMS signal raw data:<br> * Inside germinal center dataset separate into 2<br> * Outside germinal center dataset<br> * Border germinal center dataset<br> * Unlabeled dataset separate into 2<br> * Labeled tonsil tissue dataset<br> * Unlabeled tonsil tissue dataset</p> <p>1 processed data for python numpy version: 3D metabolites npy Data.zip</p> <p>Each dataset is a folder that has 191 txt files corresponding to the signal of 189 mass channels, the sum of all signals and the rest of signals not captured. <br> In each folder, the signal corresponding to a channel is named: name - molecular compound<br> </p>
Effects of ion slippage in Earth's ionosphere and the plasma sheet
<p>The compressed file contains text files of RCM-I simulation output. The file names specify simulation time (format: hhmmss). The stored quantities are, "I","J","COLAT","ALOCT","BNDLOC","XMIN","YMIN","FTV","BMIN","V", "BIRK_fromV(NH)","BIRK","PEDLAM", "PEDPSI", "HALL", "EFLUX", "EAVG", "eeta_k10""P(RCM),nPa", "PV_gamma","RCM_T_p","RCM_T_e","RCM_N_p","RCM_N_e","Vx_exb","Vy_exb","Vtotx","Vtoty","vel_x","Ey","f_i_005","f_i_010","f_i_020","f_i_040","f_i_060".</p>
Effects of ion slippage in Earth's ionosphere and the plasma sheet
<p>Ion_slippage_movie.avi shows the ion slippage evolvement after 1h growthphase, with time resolution of 20s.</p> <p>The text files are RCM-I simulation output. The file names specify simulation time (format: hhmmss). The stored quantities are, "I","J","COLAT","ALOCT","BNDLOC","XMIN","YMIN","FTV","BMIN","V", "BIRK_fromV(NH)","BIRK","PEDLAM", "PEDPSI", "HALL", "EFLUX", "EAVG", "eeta_k10""P(RCM),nPa", "PV_gamma","RCM_T_p","RCM_T_e","RCM_N_p","RCM_N_e","Vx_exb","Vy_exb","Vtotx","Vtoty","vel_x","Ey","f_i_005","f_i_010","f_i_020","f_i_040","f_i_060".</p>
Supplementary data for: "Global Venus-solar wind coupling and oxygen ion escape"
<p>Supplementary data for paper "Global Venus-Solar wind coupling and oxygen ion escape", submitted to Geophysical Research Letters. See README file for description of the data in each file.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": AMPOP_April2016
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the April 2016 event, with IPWM driven by AMPERE convection maps and Ovation Prime precipitation (AMPOP_April2016). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/AMPOP_April2016_output.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": SDOP_May2014
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the May 2014 event, with IPWM driven by SuperDARN convection maps and Ovation Prime precipitation (SDOP_May2014). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/SDOP_May2014_output.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": SDOP_April2016
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the April 2016 event, with IPWM driven by SuperDARN convection maps and Ovation Prime precipitation (SDOP_April2016). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/SDOP_April2016_output.</p>
Supplemental IPWM Run for "Ion heating in the polar cap under northwards IMF Bz": AMPOP_May2014
<p>Full output from the Ionosphere/Polar Wind Model (IPWM) for results published in "Ion heating in the polar cap under northwards IMF Bz", by L. J. Lamarche, R. H. Varney, and A. S. Reimer. This is a simulation of the May 2014 event, with IPWM driven by AMPERE convection maps and Ovation Prime precipitation (AMPOP_May2014). Scripts to visualize these model output and produce the figures in the article are available in a separate repository <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>.</p> <p>If you are configuring the Resen bucket available in <a href="http://doi.org/10.5281/zenodo.4453390">10.5281/zenodo.4453390</a>, mount this repository to /home/jovyan/mount/AMPOP_May2014_output.</p>
Data from: Ion microprobe measured stable isotope evidence for ammonite habitat and life mode during early ontogeny
Ammonites have disparate adult morphologies indicative of diverse ecological niches, but ammonite hatchlings are small (~1 mm diameter), which raises questions about the similarity of egg incubation and hatchling life mode in ammonites. Modern Nautilus is sometimes used as a model organism for understanding ammonites, but despite their outward similarities, the groups are only distantly related. Trends in ammonite diversity and extinction vulnerability in the fossil record contrast starkly with those of nautilids, and embryonic shells from Late Cretaceous ammonites are two orders of magnitude smaller than nautilid embryonic shells. To investigate possible environmental changes experienced by ammonite hatchlings, we used secondary ion mass spectrometry (SIMS) to analyze the oxygen and carbon isotope composition of the embryonic shells and early postembryonic whorls of five juveniles of Hoploscaphites comprimus obtained from a single concretion in the Fox Hills Formation of South Dakota. Co-occurring bivalves and diagenetic calcite were also analyzed to provide a benthic baseline for comparison. The oxygen isotope ratios of embryonic shells are more like those of benthic bivalves, suggesting that ammonite eggs were laid on the bottom. Ammonite shell immediately after hatching has more negative δ18O, suggesting movement to more shallow water that is potentially warmer and/or fresher. After approximately one whorl of postembryonic growth, the values of δ18O become more positive in three of the five individuals, suggesting that these animals transitioned to a more demersal mode of life. Two other individuals transition to even lower δ18O values that could suggest movement to nearshore brackish water. These data suggest that ammonites, like many modern coleoids, may have spawned at different times of the year. Because scaphites were one of the short-term K-Pg survivors, it is possible that this characteristic allowed them to develop a broader geographic range and, consequently, a greater resistance to extinction.
Ion Creanga_2
Facade located on entrance at Pedagogical State University Ion Creangă from Chișinău Source: Objaverse 1.0 / Sketchfab
Chemical characterization of atmospheric ions at the High-Alpine station Jungfraujoch (Switzerland)
<p>The ion composition at high-altitude (3454 m a.s.l.) was measured with an Atmospheric<br> Pressure interface Time of Flight mass spectrometer (APi-TOF) during a period of nine<br> months, from August 2013 to April 2014. The negative mass spectra were dominated by the<br> ions of sulfuric, nitric, malonic and methanesulfonic acid (MSA) as well as SO5- . The most<br> prominent positive ion peaks were from amines. The other cations were mainly organic compounds<br> clustered with a nitrogen-containing ion, which could be either NH4+ or an aminium.<br> Occasionally the positive spectra were characterized by groups of compounds each differing<br> by a methylene group. In the negative spectrum, sulfuric acid was always observed during<br> clear sky conditions following the diurnal cycle of sun irradiation. On many occasions we<br> also saw a high signal of sulfuric acid during night time when clusters up to the tetramer<br> were observed. A plausible reason for these events could be evaporation from particles at low<br> relative humidity. A remarkably strong correlation between the signals of SO5- and CH3SO3-<br> was observed for the full measurement period. The presence of these two ions during both<br> the day and the night suggests a non-photochemical channel of formation which is possibly<br> linked to halogen chemistry. Halogenated species, especially Br– and IO3- , were frequently<br> observed in air masses that originated mainly from the Atlantic Ocean and occasionally from<br> continental areas based on back trajectory analyses. We found I2O5 clustered with an ion, a<br> species that was proposed from laboratory and modelling studies. All halogenated ions exhibited<br> an unexpected diurnal behaviour with low values during day time. New particle formation<br> (NPF) events were observed and characterized by 1) highly oxygenated molecules (HOMs) and<br> low sulfuric acid or 2) ammonia-sulfuric acid clusters. We present characteristic spectra for<br> each of these two event types based on 26 nucleation episodes. The mass spectrum of the<br> ammonia-sulfuric acid nucleation event compares very well with laboratory measurements<br> reported from the CLOUD chamber. A source receptor analysis indicates that new particle<br> formation events at the Jungfraujoch take place within a restricted period of time of 24-48<br> hours after air masses have had contact with boundary layer. This time frame appears to be<br> crucial to reach an optimal oxidation state and concentration of organic molecules necessary<br> to facilitate nucleation.</p>
MD simulation trajectory of a POPC/POPS (4:1) bilayer with 1M NaCl, Berger force field for lipids and ffgmx for ions
<p>MD simulation trajectory of a POPC/POPS (4:1) bilayer with 1M NaCl (102 POPC, 26 POPS, 4290 WAT, 106 Na+, 80 Cl-). Additional Na+ cations added to neutralize the negative charge of POPS. Berger force field for lipids and ffgmx for ions are employed. Gromacs 4.0.7, T=310K, 200 ns trajectories were calculated with the last 50 ns stored here.</p> <p>Used in:</p> <p>P. Jurkiewicz, L. Cwiklik, A. Vojtiskova, P. Jungwirth, M. Hof, Structure, Dynamics, and Hydration of POPC/POPS Bilayers Suspended in NaCl, KCl, and CsCl <br> <em>BBA Biomembranes </em>2012<em>, 1818, 609-616.</em><br> DOI: 10.1016/j.bbamem.2011.11.033</p> <p> </p>
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