Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
14
datasets available to search
ShareScore release 0.9.0
Dataset results
14 results for “concentration addition”
Green algae, cyanobacteria and diatom concentrations from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) Project
SALTEx (Seawater Addition Long-Term Experiment) is a field experiment designed to simulate saltwater intrusion in a tidal freshwater wetland to predict how chronic (Press) and acute (Pulse) salinization will affect this and other tidal freshwater ecosystems. The SALTEx experiment was initiated in 2012 and consists of 31 field plots , each 2.5 m on a side. There are three treatments (Press, Pulse, and Fresh) and two types of controls (with and without sides), each consisting of six replicates. The Press treatment plots receive regular (4 times each week) additions of a mixture of seawater and fresh river water. Pulse plots receive the same mixture of seawater and river water during September and October, which is historically a time of low flow in the river when natural saltwater intrusion occurs. The Fresh treatment plots receive regular additions of fresh river water. Treatment water is added during low tide to facilitate its infiltration into the soil, and all plots are inundated by astronomical tides at high tide. We are measuring the abundance of benthic algae with a BenthoTorch as one of the response variables for the SALTEx project.
Peatland Vascular Plant Leaf N Concentrations (10 Species) From Leaves Collected From N-Addition Plots in an Alberta Peatland, 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). In July of each year, we collected new growth of ten species of vascular plants, returned them to the lab, cleaned them, dried and ground them, and ran them on a Flash EA 1112 Series CN Soil Analyzer. Leaf N concentration responses to increasing N input differed between species. Increasing N input led to increasing leaf N concentrations in A. polifolia, C. calyculata, V. vitis-idaea, and V. oxycoccos, with differences in N concentrations between years for all of these species except V. vitis-idaea. There was no leaf N concentration response to increasing N input for E. vaginatum, R. chamaemorus, S. trifolia, or K. polifolia. Water input alone had no significant effect on leaf N concentration for any of the species (p >= 0.18). Although aboveground growth of bog vascular plants may be a general response to increasing N deposition, we do not have a species-specific mechanistic understanding of how growth and leaf/needle N concentrations respond to increasing N deposition, however, there appeared to be no strong evidence for luxury consumption of N.
Sphagnum fuscum Capitulum Density, Mass, and N Concentrations From N-Addition Plots in an Alberta Peatland, 2013-2015
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). From 2013-2015, we examined the effects of N addition on changes in S. fuscum capitulum mass density, N concentrations, and N contents in plants collected in early July (summer) and early October (fall). In each year, capitulum mass density decreased with increasing N input at equal rates in summer-collected and fall-collected plants, although CMD was consistently higher in fall-collected than in summer-collected plants. For both summer- and fall-collected plants, capitulum N concentrations were unaffected by N inputs, although N concentrations were consistently higher in summer (14.4 ± 0.3 mg g-1) than in fall (0.7 ± 0.1 mg g-1). Combining CMD and capitulum N concentrations, capitulum N contents overall averaged 1.16 ± 0.04 g m-2. Capitulum N contents decreased with increasing N input, with the response being stronger in 2013 than in 2014/2015 . These results, combined with stem and capitulum responses at Mariana Lakes Bog, suggest that increasing N loading affects not only S. fuscum NPP, but also the way in which S. fuscum grows.
Pore Water Concentrations of Nitrogen From N-Addition Plots in an Alberta Peatland, 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). We collected surface pore water from all plots several times a year throughout the 5 year experiment. Porewater NH4 +-N, NO3 --N, and DON concentrations were unaffected by N input in any of the five years (rmANOVA; p = 0.44, 0.37, and 0.82, respectively). We hypothesized that as N deposition increases to a level that exceeds the capacity of the bog vegetation to take up N, net N mineralization in surface peat would be inhibited by higher NH4 +-N availability, net nitrification would be stimulated by higher NH4 +-N availability, and concentrations of DIN in porewater at the top of the water table would increase, as DIN bypasses interception by the ground layer vegetation. None of these hypotheses was supported with nitrogen being immediately taken up by vegetation. It is unclear if longer term study would reveal similar responses.
Peatland Vascular Plant Leaf N Concentrations (5 species) From Leaves collected from N-Addition plots in an Alberta Poor Fen, 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). In July of each year, we collected new growth of 5 species of vascular plants, returned them to the lab, cleaned them, dried and ground them, and ran them on a Flash EA 1112 Series CN Soil Analyzer Leaf N concentrations in C. calyculata, A. polifolia, and V. oxycoccos increased significantly with increasing N addition (Fig. 5). For C. calyculata and A. polifolia, there were differences in N concentrations between years, but the regression slopes describing the response to N addition were consistent across all years. Leaf N concentrations were unaffected by N addition for E. vaginatum and S. palustris, with the latter exhibiting interannual differences in leaf N concentrations. Water addition alone had no significant effect on N concentrations for any of the vascular plant species (p >= 0.67).
Pore water concentrations of Nitrogen from N-Addition plots in an Alberta Poor Fen, 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). We collected surface pore water from all plots several times a year throughout the 5 year experiment. Over the 5 years of the study, porewater NH4+-N, NO3--N, and DON concentrations at the top of the poor fen water table were unaffected by N addition (p = 0.06, 0.30, 0.16, respectively). However, porewater NH4+-N, NO3--N, and DON concentrations were substantially higher in 2011 than in 2012-2015 (Fig. 11). Water addition alone had no significant effect on porewater concentrations of NH4+-N, NO3--N, or DON (p > 0.99). We hypothesized that as N deposition increases to a level that exceeds the capacity of the fen vegetation to take up N, net N mineralization in surface peat would be inhibited by higher NH4+-N availability, net nitrification would be stimulated by higher NH4+-N availability, and concentrations of DIN in porewater at the top of the water table would increase, as DIN bypasses interception by the ground layer vegetation. None of these hypotheses was supported with nitrogen being immediately taken up by vegetation. It is unclear if longer term study would reveal similar responses.
Interior Alaska managed sites: soil organic layer and mineral soil nutrient concentrations and additional characteristics measured one time in either summer 2012 or 2013
This dataset contains soil organic layer and mineral soil depth, C and N concentrations, and other soil characteristics collected at all managed and adjacent unmanaged study sites.
Tumescent injections in subcutaneous pig tissue disperse fluids volumetrically and maintain elevated local concentrations of additives for several hours, suggesting a treatment for drug resistant wounds
Open the record for dataset details and reuse information.
Molecular dynamics simulations of lipid bilayers containing POPC and POPS (5:1) with ECC-lipids force field, and Na+ (K+) counterions at various CaCl2 additional concentrations
<p>Classical molecular dynamics simulations of various mixtures of POPC:POPS lipid bilayers in water solution with Na+ counterions (or with K+ counterions when noted with "_KCl" suffix) and an additional concentration of CaCl2.</p> <p>The numbers in the file names denote the number of additional Ca2+ cations.</p> <p>ECC-lipids force field parameters used for lipids, SPC/E water model and ECC-ions, all parameters available at <a href="https://github.com/jmelcr/ecc_lipids">https://github.com/jmelcr/ecc_lipids</a></p> <p>simulations performed with Gromacs 2018.0 (*.xtc files)</p> <p>simulation length 1000 ns = 1 microsecond</p> <p>temperature 298 K</p> <p>Simulations without additional salts are at a <a href="https://doi.org/10.5281/zenodo.1488094">separate deposit: 10.5281/zenodo.1488094</a>.</p>
Molecular dynamics simulations of lipid bilayers containing POPC and POPS (5:1) with ECC-lipids force field, and Na+ (K+) counterions at various additional concentrations of NaCl and KCl
<p>Classical molecular dynamics simulations of various mixtures of POPC:POPS lipid bilayers in water solution with Na+ counterions (or with K+ counterions when noted with "_KCl" suffix) and an additional concentration of NaCl or KCl.</p> <p>The numbers in the file names denote the number of additional cations.</p> <p>ECC-lipids force field parameters used for lipids, SPC/E water model and ECC-ions, all parameters are included in this repository in GROMACS format and are also available at <a href="https://github.com/jmelcr/ecc_lipids">https://github.com/jmelcr/ecc_lipids</a></p> <p>simulations performed with Gromacs 2018.0 (*.xtc files)</p> <p>simulation length 1000 ns = 1 microsecond</p> <p>temperature 298 K</p> <p>Simulations without additional salts are at a <a href="https://doi.org/10.5281/zenodo.1488094">separate deposit: 10.5281/zenodo.1488094</a>.</p>
Data from: Neighborhood-scale analyses of non-additive species effects on cation concentrations in forest soils
Open the record for dataset details and reuse information.
Can the Addition of Pioglitazone to SGLT2 Inhibitor in Type 1 Diabetic Patients Amplify the Decrease in HbA1c and Prevent the Increase in Plasma Ketone Concentration?
ClinicalTrials.gov study NCT06922656. IPD Sharing: YES. Countries: 3. Publications: 0.
Addition of melanin concentration hormone and control in osteogenic differentiation of mesenchymal stem cells
GEO Series GSE242377. Mus musculus. 6 samples. Type: Expression profiling by high throughput sequencing.
Nitrogen addition increases aboveground silicon and phytolith concentrations in understory plants of a tropical forest
<p><strong><i>Purpose</i></strong>: Silicon (Si) is a beneficial element for plants and plays important roles in the biogeochemical cycle of mineral elements. Yet, few studies have focused on the impact of nitrogen (N) deposition on plant Si uptake and the Si biocycle.</p> <p><strong><i>Methods</i></strong>:<strong> </strong>We designed an experiment dealing with canopy and understory N addition in a tropical forest to comprehensively assess the response of Si cycle to N addition focusing on understory plants and topsoil. After six years of treatment, we compared the effects of different treatments on the concentrations of Si-related variables in the leaves of dominant understory species, and topsoil. The foliar elemental stoichiometry, plant water-use efficiency, and soil properties were also assessed to explore potential mechanisms underpinning an N-regulated biological feedback loop of Si.</p> <p><strong><i>Results</i></strong>: The concentrations of SiO<sub>2</sub> and phytolith in the leaves of the understory plants increased under N addition, while those of phytolith and plant-available Si in the topsoil were not altered. The significant accumulation of Si in the leaves and the unaltered plant-available Si concentrations in the soil were associated with enhanced plant Si uptake and decreased soil phytolith return due to increased phosphorus (P) limitation, soil acidification, and decreased leaf C:N ratios caused by N addition.</p> <p><strong><i>Conclusion</i></strong>: Our findings suggest that N addition affected plant phytolith production and its coupling with the Si biocycle in the forest which may stimulate plant Si accumulation and decrease soil Si return. Nitrogen enrichment will alter the biological Si cycle in forest ecosystems at regional and global scales.</p>
ScienceDex guides
Understand access before you commit
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.