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.
33
datasets available to search
ShareScore release 0.7.1
Dataset results
33 results for “hydrogen isotopes”
Fig. 1 in The metabolic sensitivity of hydrogen isotope fractionation differs between plant compounds
Fig. 1. Schematic, simplified overview of plant leaf carbohydrate, acetogenic lipid, and phytol synthesis. Reactions altered by impaired enzyme activities through mutations in the starch synthesis pathway marked in red for A. thaliana, or otherwise annotated for different species. Arrows in blue indicate putative reactions where C-bound H-exchange can occur. NADPH production is marked in purple and NADPH consumption is marked in pink. All used mutants accumulate trace amounts of starch, *except for the adg2-1 genotype, which accumulates around 40% of WT starch levels (Lin et al., 1988a). The MEP and acetogenic pathways are highlighted by yellow and orange dashed lines, respectively. Night-time starch degradation can provide a source of 2H-depleted carbohydrates in WT plants and is marked with brown dashed lines. Transport of G6P across the chloroplast membrane, indicated by the dashed black line, may occur when chloroplast G6P reach excess levels, like in pgm mutants (Kunz et al., 2010). Organic compounds extracted and measured for δ2H are shown in outlined white boxes. Abbreviations: 3PGA, 3-phosphoglycerate; Acetyl-CoA, acetyl coenzyme A; ADPGlc, ADP-glucose; CBB cycle, Calvin-Benson-Bassham cycle; DHAP, dihydroxyacetone phosphate; DOXP, 1-deoxy-D-xylulose 5-phosphate; F1,6BP, fructose 1,6-bisphosphate; F6P, fructose 6-phosphate; FA, fatty acid; Fd, ferredoxin; FNR, ferredoxin-NADP+ reductase; G6P, glucose 6-phosphate; G1P, glucose 1-phosphate; GAP, glyceraldehyde 3-phosphate; GGPP, geranylgeranyl pyrophosphate; Glc, glucose; IPP, isopentenyl pyrophosphate; Mal, maltose; MEP, 2-C-methylerythritol 4-phosphate; oxPPP, oxidative pentose phosphate pathway; Sucrose 6P, sucrose 6-phosphate; UDPGlc, UDP-glucose. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
Fig. 5 in The metabolic sensitivity of hydrogen isotope fractionation differs between plant compounds
Fig. 5. Schematic overview of the origin of H positions from phytol (A), n-C16:0 (B), and G6P and F6P (C). Red H represents that originating from RuBP and are annotated with possible positions in superscript, following nomenclature from Wieloch et al. (2022a): H1, H2, H6S and H6R, where H1 and H6S, and H2 and H6R are interchangeable at the triose-phosphate level, noted as H 1/6S and H 2/6R, respectively. Blue H represent those derived from surrounding water. Green H represent those derived from NADPH. Tallies of H atoms from specific sources are shown for different compounds. In these tallies, numbers of H1/6S are separately counted, highlighting that H 1/6S is contributing more H in phytol and carbohydrates compared to in acetogenic lipids. Superscript numbers on C atoms follow C positions 1 through 6 in hexose molecules. Although numbers on C atoms should also be considered interchangeable at the triose-phosphate level, we did not visualize this to maintain better traceability of C throughout reactions. Simplified visualization of RuBisCO carboxylation and oxygenation shows exchange of H 2/6R with water and 2H-enrichment of H1/6S in the photorespiration pathway, which end up in 3PGA. During the PGI reaction between F6P and G6P, H2/6R can transfer intramolecularly or H 2/6R can be exchanged with water, which should be considered if H 2/6R is thought to be an important driver for δ2 H values. Information compiled from different publications (Cormier et al., 2018; Eisenreich et al., 2004; Gutbrod et al., 2019; Lichtenthaler, 1999; Schleucher et al., 1999; Schmidt et al., 2003). Abbreviations: 3PGA, 3-phosphoglycerate; DMAPP, dimethylallyl pyrophosphate; DOXP, 1-deoxy-D-xylulose 5-phosphate; F6P, fructose 6-phosphate; G6P, glucose 6-phosphate; GAP, glyceraldehyde 3-phosphate; GGPP, geranylgeranyl pyrophosphate; IPP, isopentenyl pyrophosphate; MEP, 2-C-methyl-D-erythritol 4-phosphate; RuBP, ribulose 1,5-bisphosphate; TPP, thiamine pyrophosphate. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
Fig. 3 in The metabolic sensitivity of hydrogen isotope fractionation differs between plant compounds
Fig. 3. Δεbio values of different compounds across starchless mutants of species with respect to WT mean value. Boxplot structure is explained in Fig. 2. Asterisks indicate a significant difference from zero (***p <0.001, **p <0.01, *p <0.05). Letters at the top of the plotting area indicate significant differences between the species within each respective compound (p <0.05). Letters below the plotting area indicate significant differences between compounds within a species (p <0.05), where species are separated by lines and fill colors, and letter positions are aligned with the respective mutant and compounds. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
Fig. 4 in The metabolic sensitivity of hydrogen isotope fractionation differs between plant compounds
Fig. 4. Comparison of εbio values among species and mutants between phytol and n-C16:0 (A), and between phytol and cellulose (B). Dashed lines represent significant (p <0.05) correlations, with the black line representing the correlation across all species and genotypes, and the colored lines representing the correlations across genotypes within a species. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
Hydrogen Isotope Fingerprinting of Lipid Biomarkers in the Chinese Marginal Seas-Data
<p>Hydrogen isotope data for lipid biomarkers extracted from surface sediments of the Chinese marginal seas. </p>
Temporal and spatial variability of the stable isotopic composition of atmospheric molecular hydrogen: observations at six EUROHYDROS stations
<p>These are the H2 mixing ratio and deuterium content data used in: <br /> Batenburg, A. M., Walter, S., Pieterse, G., Levin, I., Schmidt, M., Jordan, A., Hammer, S., Yver, C., and Röckmann, T.: Temporal and spatial variability of the stable isotopic composition of atmospheric molecular hydrogen: observations at six EUROHYDROS stations, Atmos. Chem. Phys., 11, 6985-6999, doi:10.5194/acp-11-6985-2011, 2011,http://www.atmos-chem-phys.net/11/6985/2011/acp-11-6985-2011.html<br /> <br /> Please cite this ACP article when using these data in a publication, and kindly notify the first author (annekebatenburg'at'gmail.com).<br /> <br /> In the CSV files:<br /> - Mixing ratios are reduction gas analyzer results obtained at UHEI-IUP, MPI-BGC and LSCE.<br /> - dD(H2) data are obtained from analysis with the GC-IRMS system at the IMAU-APCG lab of Utrecht University. The estimated standard deviation/error in a single measurement is 4.5 permil, based on measurements of a laboratory working tank.<br /> - Outlier selection was based on visual inspection of the time series.<br /> - The "biased" or "downshifted" flag indicates dD measurements performed in a period where the dD results seemed to have a positive bias of approximately 9.5 permil. These samples were shown in the time series figure with the 9.5 permil subtracted, but excluded from the following quantitative analyses.<br /> - The last column indicates the number of succesfull repeat measurements of dD.<br /> <br /> More information can be found in the published, open-access article. Please do not hesitate to contact annekebatenburg'at'gmail.com if you have any questions.</p>
Hydrogen Isotope fingerprinting of lipid biomarkers in the Chinese Marginal Seas
Open the record for dataset details and reuse information.
Data for Triple Oxygen and Hydrogen Stable Isotope Composition of Water in Murchison Carbonaceous Chondrite
Open the record for dataset details and reuse information.
Hydrogen isotopes (d2H) of polyunsaturated fatty acids track bioconversion by zooplankton
<p>Organisms at the base of aquatic food webs synthesize essential nutrients, such as omega-3 polyunsaturated fatty acids (n-3 PUFA), which are transferred to consumers at higher trophic levels. Many consumers, requiring n-3 long-chain (LC) PUFA, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), have limited ability to bioconvert them from the essential dietary precursor α-linolenic acid (ALA) and thus rely on dietary provision of LC-PUFA. We investigated LC-PUFA metabolism in freshwater zooplankton using stable hydrogen isotopes (<i>d</i><sup>2</sup>H) of fatty acids as tracers. We conducted feeding experiments with the freshwater keystone grazer <i>Daphnia</i> to quantify changes in the <i>d</i><sup>2</sup>H value of body FA in response to the FA composition of their food and the <i>d</i><sup>2</sup>H value of the ambient water. The isotopic composition of LC-PUFA changed in <i>Daphnia</i>, depending on the integration of <sup>2</sup>H from ambient water during <i>de novo </i>synthesis or bioconversion from dietary precursors, allowing us to distinguish dietary from bioconverted EPA in body tissue. We tested the applicability of these laboratory findings in a field setting by analyzing <i>d</i><sup>2</sup>H values of PUFA in primary producers and consumers in eutrophic ponds to track EPA sources of zooplankton. Multilinear regression models that included conversion of ALA to EPA correlated better with zooplankton <i>d</i><sup>2</sup>H<sub>EPA</sub> than seston <i>d</i><sup>2</sup>H<sub>EPA</sub> at low dietary EPA supply. This study provides evidence that zooplankton can compensate for low dietary EPA supply by activating LC-PUFA biosynthesis and shows that herbivorous zooplankton play a crucial role in upgrading FA for higher trophic levels during low dietary EPA supply.</p>
Hydrogen isotopes (d2H) of polyunsaturated fatty acids track bioconversion by zooplankton
Open the record for dataset details and reuse information.
Hexafluorophosphate-Triggered Hydrogen Isotope Exchange (HIE) in Fluorinated Environments: A Platform for the Deuteration of Aromatic Compounds via Strong Bond Activation
<p>The data set contains DFT with the program package ORCA to calculate the free enthalpy of the reaction for the hydrolysis of PF6-activated with hexafluoroisopropanol (HFIP) and reaction barriers with the help of nudged elastic band (NEB) calculation. The data in Simulated_IR contains DFT optimization and frequency calculations performed using Gaussian16 package.</p>
Magnetic properties of ultramafic rocks in the Troodos ophiolite, with compiled oxygen & hydrogen isotope data and magnetic susceptibility of serpentinites from different tectonic settings
Open the record for dataset details and reuse information.
Fig. 2 in The metabolic sensitivity of hydrogen isotope fractionation differs between plant compounds
Fig. 2. Δεbio values from different compounds across the A. thaliana mutants, relative to the mean of the WT. Boxes represent interquartile range and median values. The whiskers extend to observations that fall within 1.5 times above or below the box size; individual points represent observations that fall out of this range. Asterisks indicate a significant difference from zero (***p <0.001, **p <0.01, *p <0.05). Letters at the top of the plotting area indicate significant differences between the different mutants within each respective compound (p <0.05). Letters below the plotting area indicate significant differences between compounds within a mutant (p <0.05), where mutants are separated by lines and fill colors, and letter positions are aligned with the respective compound and mutant. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
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.