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2,135 results for “stabling”
Data from: Toward a standardised protocol for the stable isotope analysis of scleractinian corals
<p><strong>Rationale:</strong> The stable isotope analysis of carbon and nitrogen is a powerful tool in many ecological studies, but different sample treatments may affect stable isotope ratios and hamper comparisons among studies. The goal of this study was to determine whether treatments that are commonly used to prepare scleractinian coral samples for stable isotope analysis yield different δ<sup>15</sup>N and δ<sup>13</sup>C values, and to provide guidelines toward a standardised protocol. </p> <p><strong>Methods:</strong> The animal tissues and Symbiodiniaceae of two symbiotic scleractinian coral species (<em>Stylophora pistillata</em> and <em>Porites lutea</em>) were divided into subsamples to test the effects of the drying method, lipid extraction, acidification treatment and water washing. All the subsamples were analysed for their δ<sup>15</sup>N and δ<sup>13</sup>C values, using continuous flow elemental analyser/isotope ratio mass spectrometry.</p> <p><strong>Results: </strong>The drying method and lipid extraction treatment had no substantial effects on the δ<sup>15</sup>N and δ<sup>13</sup>C values of Symbiodiniaceae and animal tissues. Acid treatment did cause significant differences in δ<sup>13</sup>C values (mean differences ≤0.5‰, with individual samples becoming up to 2.0‰ more negative), whereas no ecologically significant differences were observed in δ<sup>15</sup>N values. Animal tissue δ<sup>13</sup>C values may vary depending on whether samples are washed or not. </p> <p><strong>Conclusions: </strong>To move towards a standardised protocol in coral research, we recommend using an available drying method (as they are equally acceptable) for the stable isotope analysis of scleractinian corals, examining the need for lipid extraction on a case‐by‐case basis, performing a direct acidification of Symbiodiniaceae and animal tissues, and avoiding washing animal tissue with distilled water.</p>
mselensky/Selensky2021_LavaBeds_Lithoautotrophy: Stable Carbon Isotope Depletions in Lipid Biomarkers Suggest Subsurface Carbon Fixation in Lava Caves
<p>Data and R script repository for the manuscript "Stable Carbon Isotope Depletions in Lipid Biomarkers Suggest Subsurface Carbon Fixation in Lava Caves" (Selensky et al. 2021)</p>
Stable, Storehouse and Shed in Kurala, Finland
Located in Turku, Kurala, Finland. Built around 1920 - 1930. Photos taken with D5300 + Sigma fisheye + Parrot Anafi. Source: Objaverse 1.0 / Sketchfab
Protein stable isotope fingerprinting (P-SIF): Multidimensional protein chromatography coupled to stable isotope-ratio mass spectrometry
<p>Carbon stable isotope ratios (δ<sup>13</sup>C) for protein fractions extracted from a mixture of cultured cells of <em>Allochromatium vinosum </em>DSM 180 and <em>Synechocystis</em> sp. PCC6803, as well as from extracts of each pure culture.</p> <p>Citation: Mohr W, Tang T, Sattin SR, Bovee RJ, Pearson A. (2014) Protein stable isotope fingerprinting (P-SIF): Multidimensional protein chromatography coupled to stable isotope-ratio mass spectrometry. Analytical Chemistry 86, 8514-8520.</p> <p>Contact: Ann Pearson (pearson@eps.harvard.edu)</p>
Protein stable isotope fingerprinting (P-SIF): Chocolate Pots (Yellowstone) biomass
<p>Stable carbon isotope data for proteins extracted from a Yellowstone microbial mat, Chocolate Pots hot springs.</p>
Protein stable isotope fingerprinting (P-SIF): Mahoney Lake (Canada) 7-m biomass
<p>Carbon isotope data for proteins extracted from a biomass pellet from a sulfide-oxidizing phototroph layer (7m); Mahoney Lake, British Columbia, Canada.</p>
Synthesis of Ti3AuC2, Ti3Au2C2 and Ti3IrC2 by noble-metal substitution reaction in Ti3SiC2 for high-temperature-stable ohmic contacts to SiC
<p>Repository data for paper "Synthesis of Ti<sub>3</sub>AuC<sub>2</sub>, Ti<sub>3</sub>Au<sub>2</sub>C<sub>2</sub> and Ti<sub>3</sub>IrC<sub>2</sub> by noble-metal substitution reaction in Ti<sub>3</sub>SiC<sub>2</sub> for high-temperature-stable ohmic contacts to SiC".</p> <p>Detailed information:</p> <p>Data from calculations include relaxed structures, electronic band-structure (selected compounds), electronic density of states and crystal overlap Hamilton population (selected compounds). In addition, spin-orbit coupling used for selected compounds. Data fro each compound are found in separate zip files. Scripts used to extract data are found in tools.zip.</p> <p>EDX-mapping:<br> Fig1d.xlsx</p> <p>XRD data:<br> Fig1h.xlsx, Fig2g.xlsx, FigS3.xlsx, FigS7a.xlsx</p> <p>I/V-measurements:<br> Fig4c.xlsx, FigS7b.xlsx, FigS13.xlsx</p> <p>Electrical resistance:<br> FigS5.xlsx, FigS14.xlsx</p>
Example data to run the STABLE algorithm
<p>Datasets from ERA5 (1 degree resolution) and NCAR (2.5 degree resolution) from both hemispheres to run the SubTropical Atmospheric ridge and BLocking Events (STABLE) algorithm. See the STABLE GitHub repository (https://github.com/mikaslima/STABLE) for details.</p>
Research trends in stable isotope analysis: a revision on unconsolidated intertidal ecosystems Supplementary Material 2
<p>Supplementary material corresponding to document "Research trends in stable isotope analysis: a revision on unconsolidated intertidal ecosystems".</p>
Grain size and clay mineralogy data of the Esplugafreda sequence (Spain) with stable carbon, oxygen and clumped isotope data of soil carbonates
<p>This datasets contains 1) grain size distribution data of mudstone paleosols of the Esplugafreda sequence (Esplugafreda and Claret Formations) measured by laser diffraction, and 2) clay mineralogy measured by powder X-ray diffraction, as well as 3) stable carbon, oxygen and clumped (D47) isotope compositions of soil carbonates. The Esplugafreda sequence is found in the Tremp-Graus Basin in the southern forefront of the Pyrenees and consists of continental sediments formed in a coastal alluvial setting during the late Paleocene and early Eocene.</p> <p>In addition, a proxy dataset of late Paleocene and PETM continental temperatures of the northern hemisphere is also included.</p>
dataset for: Carbonate content and stable isotopic composition of atmospheric aerosol carbon in the Canadian High Arctic
<p>Dataset related to publication of the same title in <a href="https://www.atmospheric-chemistry-and-physics.net/">Atmospheric Chemistry and Physics</a></p>
On the computation of stable coupled state-space models for dynamic substructuring applications
<p>This paper aims at introducing a methodology to compute stable coupled state-space models for dynamic substructuring applications by introducing two novel approaches targeted to accomplish this task: (a) a procedure to impose Newtons's second law without relying on the use of undamped RCMs (residual compensation modes) and (b) a novel approach to impose stability on unstable coupled state-space models. The enforcement of stability is performed by dividing the unstable model into two different models, one composed by the stable poles (stable model) and the other composed by the unstable ones (unstable model). Then, the poles of the unstable state-space model are forced to be stable, leading to the computation of a stabilized state-space model. If this model is composed by real poles, it should be divided into two different ones, one composed by the pairs of complex conjugate poles and the other composed by the real poles. Afterwards, to make sure that the Frequency Response Functions (FRFs) of the stabilized model well match the FRFs of the unstable model, the Least-Squares Frequency Domain (LSFD) method is exploited to update the modal parameters of the stabilized model composed by the pairs of complex conjugate poles. The validity of the proposed methodologies is presented and discussed by exploiting experimental data. Indeed, by exploiting the FRFs of a real system, accurate state-space models respecting Newton's second law are computed. Then, decoupling and coupling operations are performed with the identified state-space models, no matter the models resultant from the decoupling/coupling operations are unstable. Stability is then imposed on the computed unstable coupled model by following the approach proposed in this paper. The methodology proved to work well on these data. Moreover, the paper also shows that the coupled state-space models obtained using this methodology are suitable to be exploited in time-domain analyses and simulations.</p>
Stable oxygen and hydrogen isotope values for permafrost ice, rain, and snow collected near Fairbanks, Alaska and a summary of all age dates from the CRREL Permafrost Tunnel
<p>Stable oxygen and hydrogen isotope values for permafrost ice, rain, and snow collected near Fairbanks, Alaska as well as a summary of all age dates from the CRREL Permafrost Tunnel</p><p>Please contact me for more information or to use the data.</p><p>thomas.a.douglas@usace.army.mil</p>
Dataset of: Deconvolving feeding niches and strategies of abyssal holothurians from their stable isotope, amino acid, and fatty acid composition
Open the record for dataset details and reuse information.
Water Stable Isotopes in the Holthedalfonna Shallow Cores
<p><span>In the dataset, you will find the depth profile of stable oxygen isotopes taken from surface cores of the Holthedhalfonna glacier at Svalbard (79°09′N, 13°23′E; 1150 m a.s.l.). These samples were collected at a spatial resolution of 5 to 7 cm and retrieved in 2012, 2015, 2017, and 2019. The depth is converted to centimeters of water equivalent using density measurements. To align and merge the various cores, depth data from mass balance records available at <a href="http://www.mosj.com" target="_new">www.mosj.no</a> were used. All isotopic measurements were conducted utilizing a Picarro L1102-i analyzer coupled with a CTC Pal autosampler. Data for the 2012 cores are available in Spolaor et al. 2013, the 2015 core in Ruppel et al. 2017, and the 2017 core in Burgay et al. 2021. For additional information contact <a href="mailto:andrea.spolaor@cnr.it">andrea.spolaor@cnr.it</a>. </span></p> <p><span>This work has been supported by the “Programma di Ricerca in Artico” (PRA, project number PRA2019-0011, Sentinel); by the Svalbard Science Forum/Research Council of Norway through the Arctic Field Grant call (project ASIHAD, ISSICOS, BIOMASS), by French Polar Institute IPEV (Institut Polaire Français Paul-Emile Victor) science funding (programs 399 and 1192) and the Svalbard Strategic Grant (project C2S3, nr. 257636, SnowNet nr. 295779 and BC3D nr. 283466). This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 689443 via project iCUPE (Integrative and Comprehensive Understanding on Polar Environments). This research has been partially funded by <span>the University of Perugia Research Action no. 5 “Climate, Energy, and Mobility”.</span> Cryogrid simulations have been supported by the Nansen Legacy project (Research Council of Norway grant 276730) and SIOS infraNor (Research Council of Norway grant 269927).</span></p>
C19th brick stable floor, St Helier, Jersey
A C19th grey/black brick stable floor from an evaluation trench at Rue de Funchal, St Helier, Jersey. The floor was found 30cm below the modern concrete floor of a demolished shop. Source: Objaverse 1.0 / Sketchfab
Data from: Contrasting patterns of female house mouse spatial organisation among outbreaking and stable populations
<p>The size and distribution of home ranges reflects how individuals within a population use, defend, and share space and resources, and may thus be an important predictor of population-level dynamics. In eruptive species like the house mouse in Australian grain growing regions, contrasting space use between stable and outbreaking populations allows us to test predictions regarding social or life history strategies that may contribute to an outbreak. In this study we use spatially explicit capture-recapture models to compare home range overlap (as a proxy for territoriality) in female mice from populations showing different outbreak trajectories. We found that female space use in spring varied between outbreaking and stable populations. Our analysis indicated greater home range overlap in populations with stable trajectories compared to those that would later experience an outbreak, suggesting females in these stable populations may have had greater potential for cooperative group formation as indicated by shared space use. We discuss the results with respect to intrinsic factors, such as kin structure, with potential implications for better predicting mouse outbreaks at a microgeographic scale.</p>
Mesophotic corals in Hawaii maintain autotrophy to survive low-light conditions: Stable isotope dataset
<p>In mesophotic coral ecosystems, reef-building corals and their photosynthetic symbionts can survive with less than 1% of surface irradiance. How depth-specialist corals rely upon autotrophically and heterotrophically-derived energy sources across the mesophotic zone remains unclear. We analyzed the stable carbon (δ<sup>13</sup>C) and nitrogen (δ<sup>15</sup>N) isotope values of a <em>Leptoseris </em>community from the ʻAuʻau Channel, Maui, Hawaiʻi (65-125 m) including four coral host species living symbiotically with three algal haplotypes. We characterized the isotope values of hosts and symbionts across species and depth to compare trophic strategies. Symbiont δ<sup>13</sup>C was consistently 0.5‰ higher than host δ<sup>13</sup>C at all depths. Mean colony host and symbiont δ<sup>15</sup>N differed by up to 3.7‰ at shallow depths and converged at deeper depths. These results suggest that both heterotrophy and autotrophy remained integral to colony survival across depth. The increasing similarity between host and symbiont δ<sup>15</sup>N at deeper depths suggests that nitrogen is more efficiently shared between mesophotic coral hosts and their algal symbionts to sustain autotrophy. Isotopic trends across depth did not generally vary by host species or algal haplotype, suggesting that photosynthesis remains essential to <em>Leptoseris </em>survival and growth despite low light availability in the mesophotic zone.</p>
Meterological and stable carbon, oxygen and clumped isotope data of land snails Clausilia pumila, Succinella oblonga and Trochulus hispidus from Europe
<p>These data include site information and collection dates of land snails (Clausilia pumila, Succinella oblonga and Trochulus hispidus), meteorological data of collection sites of molluscs derived using the ClimateEU software, as well as carbon, oxygen and clumped isotope compositions of snail shells of the mentioned three species from culturing experiments and natural populations across Europe. During the laboratory experiments individuals of the three species were kept at 12, 18 and 24 Celsius temperatures in climate chambers, fed exclusively by fresh lettuce and humidity was controlled using tap water (d18O: -9.29+-0.52 permil, V-SMOW). d13C, 18O and D47 values of snail shells from lab experiments and field-collections were determined in two laboratories (Isnt. for Nuclear Research, Debrecen, and Geological Institute, ETH Zürich) using IRMS. Detailed analysis and interpretations of the results obtained can be read in the original publication. </p>
Using protein isolation on elasmobranch blood plasma for ecological research and stable isotope analysis
<p>Stable isotope analysis is a useful tool for studying the ecology of elasmobranchs. Analysis of elasmobranch blood plasma provides insight into an individual's ecology on a small temporal scale. However, plasma is a systemic transport vessel containing many dissolved constituents in variable amounts, which may bias analyses and ecological conclusions based on that data.</p> <p>In this study, we develop a new method of protein precipitation using ethanol and acetonitrile to isolate the protein fraction of plasma from Sandbar Sharks, and examine its effects on carbon and nitrogen stable isotope values. We also tested these solvent precipitations on bovine serum albumin as a control to assess the introduction of exogenous sources of C and N.</p> <p>Protein isolation resulted in a significant decrease in δ<sup>13</sup>C values and a significant increase in C:N compared to untreated plasma. Isolated proteins were not significantly different in δ<sup>15</sup>N value compared to untreated plasma. We observed no change in isotope composition in bovine serum albumin samples, indicating protein precipitation does not itself affect isotope analysis.</p> <p>These results suggest that the preparation of blood plasma is necessary for stable isotope analysis, to eliminate the biasing effects of other dissolved compounds. We find that solvent precipitation is an effective method of isolating proteins for stable isotope studies.</p>
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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.
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.