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76 results for “15N”
15N (Nitrate and Ammonium) Uptake by Spartina Alterniflora Sourced from Plum Island Estuary, MA and North Inlet, SC
15N uptake measurements were taken from Spartina alterniflora plants grown from seeds originating from six march locations in PLUM Island Estuary (PIE) and North Inlet, SC. All sites were Spartina alterniflora dominated marsh. 15N uptake was measured after 60 minutes in Nitrate, Ammonium, or control treatments. Seeds were collected in Fall 2022, reared Winter-Summer 2023, and uptake measured in Summer 2023.
iNRACM: Incorporating 15N into the Regional Atmospheric Chemistry Mechanism (RACM) for assessing the role photochemistry plays in controlling the isotopic composition of NOx, NOy, and atmospheric nitrate
<p><sup>15</sup>N compounds and reactions were incorporated into Regional Atmospheric Chemistry Mechanism (RACM), based on recent experimental or calculated values of isotope fractionation factors (α), to simulate δ<sup>15</sup>N values in NO<sub>y</sub> compounds.</p>
Evaluating the impact of shade on Nitrogen fixation in sulla (Hedysarum coronarium L.): a 15N natural abundance study
<p>This dataset refers to the experimental raw data (csv version) collected within the trial reported in the concerned article on the following parameters:</p> <p>1. total nitrogen, delta N15, nitrogen derived from atmosphere, root biomass, nitrogen yield, nitrogen fixed, splitted per experiment, mowing, crop, treatment and replicate (15N_root.csv).</p> <p>2. total nitrogen, delta N15, nitrogen derived from atmosphere, shoot biomass, nitrogen yield, nitrogen fixed, splitted per experiment, mowing, crop, treatment and replicate (15N_shoot.csv).</p> <p>3. shoot cumulative nitrogen yield, root cumulative nitrogen yield, shoot cumulative nitrogen fixed, root cumulative nitrogen fixed, shoot:root ratio of nitrogen yield, shoot:root ratio of nitrogen fixed, splitted per experiment, treatment and replicate (shoot root ratio and N cumulative value.csv).</p>
Primary data: Signal enhancement of hyperpolarized 15N sites in solution — increase in solid-state polarization at 3.35 T and prolongation of relaxation in deuterated water mixtures
<p>Primary data for DOI: 10.1002/nbm.4787</p> <p>NMR in Biomedicine. 2022;e4787</p> <p>Title: Signal enhancement of hyperpolarized 15N sites in solution—increase in solid-state polarization at 3.35 T and prolongation of relaxation in deuterated water mixtures</p> <p>Authors: Ayelet Gamliel, David Shaul, J. Moshe Gomori, Rachel Katz-Brull</p> <p>Description:</p> <p>These primary datasets contain data presented in the above publication and consist of:</p> <p>1. 15N-NMR spectra in solutions</p> <p>2. 13C polarization buildup data in solid-state</p> <p>3. 13C microwave profiles in solid state</p> <p>Please consult the Archive Guide.</p>
del 15N Values for Tanana River Floodplain Soils and Xylem Sap Samples
Because soil microoorganisms preferencially discriminate either for or against heavy nitrogen isotopes in organic compounds we can learn something about the route these compounds take through any given system by looking at the isotopic ratio of heavy to light nitrogen within a pool as compared to the ratio for the system as a whole. An enriched pool means that 15N has been discriminated for, while a depleted pool means 15N has been discriminated against. By determining the del 15N values for soil protein, amino acids, ammonium, the soil microbial population, and plant roots and xylem we can learn something about where plants are deriving there nitrogen nutrition.
Biomass %N, %C, natural abundance 15N and 13C isotopic signatures for common and rare under- and overstory plants in long unburned and burned (1999) boreal forest stands, Caribou-Poker Creek and Delta Junction
This dataset contains leaf, aboveground stem, and fruit carbon and N concentration and natural abundance isotope data for new and old tissue fractions of common and rare plant species in burned and unburned black spruce forest stands. Stands were located in either Caribou-Poker Creek or Delta Junction, in either unburned areas, or in areas burned in 1999 fires. Biomass was collected between 2000 and 2001 in mid-July at peak biomass.
Nitrate (15N) Uptake from samples collected aboard Palmer LTER annual cruises off the Western Antarctic Peninsula, 2012-2014
Nitrate uptake by the bulk phytoplankton community was determined using tracer (<10%) additions of labeled 15-NO3. Samples were collected by Go-Flo from 5 depths 0, 5, 10, 20, 65 m and incubated for 24 h at light levels of 100%, 50%, 25%, 10%, and 0% surface irradiance, respectively.
Data for "Combining 13C, 15N, and 2H tracer to measure feeding and metabolic activity in marine, shallow-water sponges – A pilot study"
<p>This dataset includes raw data used in the paper "Combining <sup>13</sup>C, <sup>15</sup>N, and <sup>2</sup>H tracer to measure feeding and metabolic activity in marine, shallow-water sponges – A pilot study" (JEMBE).</p>
Smartcow EU project database on feed efficiency in beef cattle and analysis of natural 15N abundance and plasma urea concentration
<p>This is a database built in the frame of the Smartcow H2020 Eu project (N°730924) and gathering individual raw data for animal performances obtained in thirteen beef cattle trials conducted in France, UK and Switzerland as well as animal values for two biomakers of feed efficiency : the natural 15N abundance in animal proteins (plasma or muscle) and plasma urea concentration. </p>
Data for: Solvent effects in hyperpolarization of 15N nuclei in [15N3]metronidazole and [15N3]nimorazole antibiotics via SABRE-SHEATH
<p>Raw 15N and 1H NMR spectra for the article which is under revision at the time posting this dataset.</p> <p>These results are also available as preprint at https://doi.org/10.26434/chemrxiv-2024-6pg8b</p> <p>15N NMR spectra were acquired using SpinSolve Expert Software (Magritek)</p> <p>1H NMR spectra were acquired using TopSpin (Bruker)</p>
Fig. 1 in 1H, 13C, 15N Chemical Shift Assignments for Mesd12-155
Fig. 1. Pangerpeton sinensis gen. et sp. nov. A. Holotype specimen (IVPP V14244) from Wubaiding Village, Lingyuan City, Liaoning Province, China, probably contemporaneous with the salamander−bearing horizon at Daohugou, Inner Mongolia, Late Jurassic/Early Cretaceous, showing ventral impression of a nearly complete skeleton. B. High−fidelity cast of holotype showing skull, forelimbs and pectoral girdle. C. Line drawing of skull and atlas, taken from cast.
Fig. 2 in 1H, 13C, 15N Chemical Shift Assignments for Mesd12-155
Fig. 2. Fifty percent Majority Rule Consensus of 28 most parsimonious trees resulting from a phylogenetic analysis using PAUP* (see character description in http://spaces.msn.com/members/ywangivpp, and matrix of taxon and character states in Table 2).
UVic2.9-MOBI2.0+Fe-15N_13C Isoscapes Hindcast
<p>The simulations provided here are based on the model version including a dynamic, prognostic iron cycle (Somes et al. 2021), and they use the previous formulations for nitrogen and carbon isotopes (Somes et al. 2017; Schmittner et al., 2013). The model code and simulation description can be found at <a href="https://hdl.handle.net/20.500.12085/9e490d1e-4873-4eec-905b-1c470f79b01b">https://hdl.handle.net/20.500.12085/9e490d1e-4873-4eec-905b-1c470f79b01b</a>. Here we provide euphotic zone results from the North Atlantic corresponding with the associated squid data locations.</p>
Data from: Bivalve shells reflect 15N enrichment in a fertilizer-dominated estuary
Open the record for dataset details and reuse information.
Denitrification losses in response to N fertiliser rates - integrating high temporal resolution N2O, in-situ 15N2O and 15N2 measurements and fertiliser 15N recoveries in intensive sugarcane systems
Denitrification is a key process in the global nitrogen (N) cycle, causing both nitrous oxide (N2O) and dinitrogen (N2) emissions. However, estimates of seasonal denitrification losses (N2O+N2) are scarce, reflecting methodological difficulties in measuring soil-borne N2 emissions against the high atmospheric N2 background and challenges regarding their spatio-temporal upscaling. This study investigated N2O+N2 losses in response to N fertiliser rates (0, 100, 150, 200 and 250 kg N ha-1) on two intensively managed tropical sugarcane farms in Australia, by combining automated N2O monitoring, in-situ N2 and N2O measurements using the 15N gas flux method and fertiliser 15N recoveries at harvest. Dynamic changes in the N2O/(N2O+N2) ratio (< 0.01 to 0.768) were explained by fitting generalised additive mixed models (GAMMs) with soil factors to upscale high temporal-resolution N2O data to daily N2 emissions over the season. Cumulative N2O+N2 losses ranged from 12 to 87 kg N ha-1, increasing non-linearly with increasing N fertiliser rates. Emissions of N2O+N2 accounted for 31–78% of fertiliser 15N losses and were dominated by environmentally benign N2 emissions. The contribution of denitrification to N fertiliser loss decreased with increasing N rates, suggesting increasing significance of other N loss pathways including leaching and runoff at higher N rates. This study delivers a blueprint approach to extrapolate denitrification measurements at both temporal and spatial scales, which can be applied in fertilised agroecosystems. Robust estimates of denitrification losses determined using this method will help to improve cropping system modelling approaches, advancing our understanding of the N cycle across scales.
Pool size and 15N atom % of nydrolyzable N in natural and enriched soils in Imnavait watershed
Hydrolyzable N pool size and 15N atom % of natural and enriched soils collected from Imnavait watershed in summer of 2005.
NO3 and NH4 collected by resin bags in 15N addition plots during 2003-2004
Concentrations of NO3 and NH4 and d15N of NO3 and NH4 collected on resin bags from 15N addition plots along hillslope in Imnavait watershed.
Chloroform-extractableN and d15N within 15N addition plots for Aug 2003
Pool size and d15N values for chloroform-extractable N, extractable-N, and non-extractable N pools. Samples collected in Aug. 2003 from 1st Organic Layer of 15N addition plots in Imnavait watershed. 1st Organic Layer = the upper 10 cm of organic soil or, if the organic layer was &lt; 10 cm thick, the entire layer (e.g., there was never &gt; 4 cm of organic soil at Crest).
Arctic LTER 1988: del 13C and del 15N ratios measurement for Eriophorum, Carex and lichen species in water tracks at Toolik and Imnavait Creek
del 13C and del 15N ratios were measured for plant and lichen in watertracks in the Toolik Lake drainage and the east facing slope of the Imnavait Creek area. Sampling locations for each species for a specific date were chosen across an elevation gradient starting from the lakeside and leading to ridge crest. The vegetation was dried and analyzed for stable isotopes.
Del 13C and del 15N ratios in a peat core at 2 cm depth intervals at 4 locations along the Dalton Highway, North Slope Alaska, 1989.
del 13C and del 15N ratios were measured on a peat core at 2 cm depth intervals. Peat cores were taken at Imnavait Creek, Pump Station 3, the Happy Valley Steram and Olikok Dock Road along the Dalton Highway, Alaska.
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Allen Brain Atlas
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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.