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534 results for “stable isotopes”
LBA-ECO CD-02 Carbon, Nitrogen, Oxygen Stable Isotopes in Organic Material, Brazil
This data set reports the measurement of stable carbon, nitrogen, and oxygen isotope ratios in organic material (plant, litter and soil samples) in forest canopy profiles and pasture (grasses and shrubs) as well as corresponding carbon and nitrogen tissue concentrations in a number of different sites across Brazil. The sampling design captured the temporal variation in rainfall over the course of several years. Carbon and nitrogen isotope ratios can act as a proxy for interpreting aspects of the carbon and nitrogen cycles in Amazonian rainforests. Data are in three comma-delimited ASCII files.
Delta-X: Root Stable Isotopes from Herbaceous Wetlands, MRD, LA, USA, August 2021
This dataset contains carbon-13 (13C) and nitrogen-15 (15N) isotopic signatures of belowground root biomass samples from herbaceous wetlands in the Atchafalaya and Terrebonne basins of the Mississippi River Delta in coastal Louisiana, U.S., during August 2021. The data were collected during the Delta-X Fall deployment. Field measurements were conducted at three sites in the Atchafalaya basin and three sites in the Terrebonne basin. Five of the sites are adjacent to sites from the Coastwide Reference Monitoring System (CRMS). The other site is located in Wax Lake Delta (WLD) without appropriate adjacent CRMS sites. Herbaceous wetland sites in both basins were chosen to represent a salinity gradient including freshwater, brackish, and saline ecosystems. Root biomass samples were collected using a gouge soil auger. Bulk isotopic signatures in living fine roots were measured with a mass spectrometer coupled to an elemental analyzer.
Delta-X: Foliar Stable Isotopes, MRD, LA, USA, 2021
This dataset contains foliar tissue C and N bulk isotopic signatures (delta 13C, delta 15N) of dominant wetland herbaceous species collected at six sites in the Atchafalaya (N = 3) and Terrebonne (N = 3) basins in coastal Louisiana. Five of the sites are from the Coastwide Reference Monitoring System (CRMS) and one site is the Mike Island Site in the Wax Lake Delta (WLD). For the herbaceous wetland sites, Aboveground biomass (AGB) was harvested inside duplicate plots (0.25 m2), located 5 m apart at each sampling station. All plant material within each plot was clipped at soil level, stored in plastic bags, and transported to the laboratory for further analyses. In the lab, plant tissue (foliar) C and N bulk isotopic signatures were analyzed for two dominant plant species from each site using a Thermo Scientific Delta V Plus CF-IRMS coupled to a Carlo-Erba 1108 elemental analyzer via a ConFlo IV interface (Thermo Fisher Scientific, Waltham, MA, USA). The data were collected during 2021-08-19 to 2021-08-27 during the Delta-X Fall 2021 deployment.
BOREAS TE-05 CO2 Concentration and Stable Isotope Composition
The BOREAS group TE-05 collected measurements in the NSA and SSA on gas exchange, gas composition and tree growth. This data set contains measurements of the concentration and stable carbon (13C/12C) and oxygen (18O/16O) isotope ratios of atmospheric CO2 in air samples collected at different heights within forest canopies. The data were collected to determine the influence of photosynthesis and respiration by the forest ecosystems on the concentration and stable isotope ratio of atmospheric CO2. These measurements were collected at the SSA during each IFC at OJP, OBS, and OA sites. Measurements were also collected at the NSA during each 1994 IFC at the OJP, T6R5S TE UBS, and T2Q6A TE OA sites. The stable isotope ratios are expressed using standard delta notation and in units of per mil. The isotope ratios are expressed relative to the international standard, PDB, for both carbon and oxygen samples.
Global Stable-isotope Tracing Metabolomics Reveals System-wide Metabolic Alternations in Aging Drosophila
GEO Series GSE204740. Drosophila melanogaster. 6 samples. Type: Expression profiling by high throughput sequencing.
Transcriptome-stable isotope probing provides targeted functional and taxonomic insights into hypoxic pollutant-degrading aquifer microbiota
GEO Series GSE119644. aquifer metagenome. 8 samples. Type: Expression profiling by high throughput sequencing; Other.
Foraging preferences of an apex marine predator revealed through stomach content and stable isotope analyses
<p>Stable Isotope Data and Stomach Content Data from Bottlenose Dolphins and their Prey. </p>
Sulfur in New Zealand geothermal systems : insights from stable isotope and trace element analyses of anhydrite from Rotokawa and Ngatamariki geothermal fields.
<p>Anhydrite major and trace element analyses</p>
Hydrochemical components and stable isotopes data
Open the record for dataset details and reuse information.
Stable Isotopes- Adults With Obesity
ClinicalTrials.gov study NCT07020741. IPD Sharing: NO. Countries: 1. Publications: 0.
Albumin Catabolic Rate Measured by a Stable Isotope
ClinicalTrials.gov study NCT05956015. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Amorphous Calcium Carbonate (Acc) Versus Crystalline Calcium Carbonate (Ccc) Using Stable Calcium Isotopes In Postmenopausal Women
ClinicalTrials.gov study NCT01338142. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Investigating Optimal Propionate Delivery to the Colon Using Stable Isotope Labeling
ClinicalTrials.gov study NCT02229500. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Using Stable Isotope Techniques to Monitor and Assess the Vitamin A Status of Children Susceptible to Infection
ClinicalTrials.gov study NCT02363985. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Bioavailability of Folate From a Mixed Diet Using a Stable Isotope Method
ClinicalTrials.gov study NCT00130585. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Use of Stable Carbon And Nitrogen Isotopes to Improve Dietary Assessment for Cardiovascular Disease
ClinicalTrials.gov study NCT04933656. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Study in Healthy Volunteers to Evaluate the Application of Stable Isotope Approach to Reduce Number of Subjects Needed for PK Studies
ClinicalTrials.gov study NCT01793870. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Absorption, Stable Isotope Appearance and Non-transferrin-bound Iron (NTBI) Profile From NaFeEDTA and Ferrous Sulphate
ClinicalTrials.gov study NCT01053442. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Anabolic Response to Beef vs Plant Protein in (Pre)Frail Older Adults Using a Novel Stable Isotope Pulse Method
ClinicalTrials.gov study NCT07254403. IPD Sharing: NO. Countries: 1. Publications: 0.
Development of a Novel Method to Study in Vivo Fatty Acid Metabolism Using Stable Isotope Labeled Fatty Acids in Humans
ClinicalTrials.gov study NCT02312492. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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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.
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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.