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9 results for “stable isotope tracer”
Stable isotope and conservative tracer data used to estimate uptake of stream water dissolved organic carbon (DOC) through a whole-stream addition of a ¹³C-DOC tracer coupled with laboratory measurements of bioavailability of the tracer and stream water DOC using lability profiling with bioreactors
We performed a whole-stream addition of a ¹³C-DOC tracer and made laboratory measurements of the biological availability of the tracer as well as stream water DOC. The study was performed in October 2002 in a 1.27 km stretch of the third-order White Clay Creek in southeastern Pennsylvania. The tracer was prepared as a cold-water leachate of ¹³C-labeled tulip poplar saplings and it was added to the stream along with sodium bromide, a conservative tracer, over a 2-h period. Stream water samples were collected at 8 downstream stations over an 8-h period, filtered, and analyzed for concentrations of bromide and DOC. DOC was measured by Pt-catalyzed, persulfate oxidation, Br- was analyzed by ion chromatography, and C isotope samples were rotary evaporated, acidified, lyophilized, combusted, and the CO₂ analyzed with an elemental analyzer interfaced with an isotope ratio mass spectrometer. Lability profiling of the ¹³C-DOC tracer and stream water DOC were performed with a series of plug-flow bioreactors of increasing empty-bed contact times with the concentration of biodegradable DOC operationally defined as the difference between the DOC concentrations in the influent and effluent waters of the bioreactors. The bioreactor measurements were performed 2 days after the whole-stream release. Data were analyzed to estimate the uptake of stream water DOC associated with labile and semi-labile fraction of biodegradable DOC. These data have been previously used in a 2008 publication in Freshwater Biology, doi:10.1111/j.1365-2427.2007.01941.x.
Fig. 3 in Mercury and stable isotopes ( N and C) as tracers during the ontogeny of Trichiurus lepturus
Fig. 3. Relationship between δ15N and δ13C in the muscle of sub-adult and adult specimens of Trichiurus lepturus. Bars represent the standard deviation.
Fig. 1 in Mercury and stable isotopes ( N and C) as tracers during the ontogeny of Trichiurus lepturus
Fig. 1. Northern Rio de Janeiro, in south-eastern Brazil. The sampling area where the Trichiurus lepturus specimens were collected is marked with a dashed polygon.
Fig. 2 in Mercury and stable isotopes ( N and C) as tracers during the ontogeny of Trichiurus lepturus
Fig. 2. Length (cm), weight (g), total mercury concentration (THg) in dry and wet weight basis and isotopic signatures (δ15N and δ13C) of sub-adult and adult specimens of Trichiurus lepturus, considering dry season, rainy season, and all sampling periods. Data is shown as a mean and standard deviation. The scale for length, weight, and THg is different for the two ontogenetic phases.
Data from: Stable isotope tracers reveal a trade-off between reproduction and immunity in a reptile with competing needs
Open the record for dataset details and reuse information.
Multi-year impact of maternal provisioning on a juvenile elasmobranch: pitfalls of tissue type and tracer number for stable isotope analysis
<p>Stable isotope data and R script for all the analysis referred to in the manuscript.</p>
Meteorological, catchment wetness, natural tracers and stable isotopes of water data in Schwingbach Environmental Observatory, Germany
<p>Dataset includes the following high-resolution (3 h) variables in 2018 and 2019 :</p> <ul> <li>Meteorological data</li> <li>Discharge</li> <li>Soil moisture</li> <li>Water temperature</li> <li>pH</li> <li>Electrical conductivity</li> <li>stable isotopes of water</li> </ul>
Investigating the Digestibility, Bioavailability and Utilisation of Varied Combined Protein Sources in Older Males Using a Dual Stable Isotope Tracer Technique
ClinicalTrials.gov study NCT07038655. IPD Sharing: NO. Countries: 1. Publications: 1.
MRI and Stable Isotope Tracer Studies for Detecting the Progression of Non-Alcoholic Steatohepatitis (NASH)
ClinicalTrials.gov study NCT04227782. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
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Allen Brain Atlas
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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.