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1,051 results for “ring”
Thermochemical Data for Furan-based Monomer Candidates for Frontal Ring-Opening Metathesis Polymerization (FROMP)
<p>This dataset includes 471 furan-based monomer candidates for frontal ring-opening metathesis polymerization (FROMP) and relevant thermochemistry as calculated with density functional theory (DFT). The monomer candidates were combinatorically enumerated using Diels-Alder reactions of furan derivatives as dienes and four types of dienophiles (alkenes, alkynes, allenes, and benzynes). Common substituents were enumerated for the dienophile classes, and methyl substitution on the diene was explored. We used the SMILES arbitrary target specification (SMARTS) language to produce monomers and ring-opened structures from diene and dienophile precursor SMILES, and we studied the ring-opening reaction using a homodesmotic equation with ethene. RDKit conformers were initially generated from SMILES, then optimized with GFN2-xTB. The two conformers lowest in energy were then optimized with DFT using the wb97x-D3 functional, def2-TZVP basis set, and def2/J auxiliary basis set. Gibbs free energy corrections were obtained through frequency calculations. Structures with imaginary frequencies below -50 cm^{-1} were excluded from this work, and smaller imaginary modes were flipped to be positive for free energy calculations. Modes below 50 cm^{-1} were treated with the modified rigid rotor approximation, and all thermochemical values were calculated at T=200C. The CSV file contains the monomer SMILES, the free energy of reaction for Diels-Alder addition (G_DA_200), and the enthalpy of the ring-opening reaction (H_RO_200). All energies are given in kcal/mol. An interactive HTML is also included to visualize the monomers in this dataset.</p>
EXPLO. Lin 3. Supplementary material for Yermokhin et al., 2025, Dendroarchaeology at Lake Ohrid: Pine Tree-Ring Chronology and 5th Millennium BCE Palisades from the Pile-Dwelling Settlement of Lin 3, Albania
<p>Supplementary data for the article "Dendroarchaeology at Lake Ohrid: Pine Tree-Ring Chronology and 5th Millennium BCE Palisades from the Pile-Dwelling Settlement of Lin 3, Albania, by Maxim Yermokhin, Andrej Maczkowski, Matthias Bolliger, John Francuz, Adrian Anastasi, Krist Anastasi, Ariane Ballmer, Ilirjan Gjipali, Mirco Brunner, Tryfon Giagkoulis, Martin Hinz, Marco Hostettler, Johannes Reich, Sönke Szidat, Albert Hafner submited in Dendrochronologia.</p>
Advancing shrub dendroecology: a cutting-edge machine learning method for measuring shrub rings
<p>This dataset contains the original data used for the manuscript "<span>Advancing shrub dendroecology: a cutting-edge machine learning method for measuring shrub rings". Image labels is structured as follows: </span></p> <p><span>Site code - Species - sample number </span></p> <p><span>Sites: </span></p> <ul> <li><span>F stands for Finse</span></li> <li><span>A stands for Abisko</span></li> </ul> <p><span>Species :</span></p> <ul> <li><span>DO stands fro Dryas octopetala </span></li> <li><span>EH for Empetrum hermaphroditum</span></li> </ul>
Tree-ring dataset derived from timbers of roof structures at Colegial del Salvador church in Seville and Jaen Cathedral (Spain)
<p>Tree-ring dataset in Heidelberg format derived from pine (Pinus sp.) timbers of the roof structures at Jaen Cathedral (dendro code JCS) and the Colegial del Salvador church in Seville (code SCS). These samples were researched within the scope of the NWO-funded project <em>Filling in the blanks in European dendrochronology</em>. They are documented in the following article:</p> <p>Domínguez-Delmás, M.,<strong> </strong>Van Daalen, S., Alejano-Monge, R., Wazny,T., 2018. Timber resources, transport and woodworking techniques in post-medieval Andalusia (Spain): Insights from dendroarchaeological research on historic roof structures. <em>Journal of Archaeological Science</em> <strong>95</strong>: 64–75. <a href="https://doi.org/10.1016/j.jas.2018.05.002">https://doi.org/10.1016/j.jas.2018.05.002</a></p> <p>This upload includes the supplementary material accompanying the article (tables with sampled elements on each building and their metadata). While most of the timbers from Jaen Cathedral are dated, only two of 71 from the Colegial are dated.If discrepancies exist between the metadata inserted in the headers of the measurements and tables uploaded here and the metadata on the article, the metadata published in the article prevails.</p>
Stormtime ring current heating of the ionosphere and plasmasphere Numerical information for the figures
<p>This archive contains data files needed to reproduce selected figures from the following manuscript:</p> <p>Stormtime ring current heating of the ionosphere and plasmasphere<br> by J. Krall, M.-C. Fok, J. D. Huba, and A. Glocer</p> <p>This manuscript was submitted to Journal of Geophysical Research: Space<br> Physics in February, 2022</p> <p>Specifically, this archive contains one IDL file for each figure. If run, the<br> IDL script reads one or more of the datasets and re-creates the figure.<br> Each IDL script is a text-formatted file with a header that explains each file.<br> Individual datasets are either text-formatted or unformatted FORTRAN data<br> files. Also included is a namelist file giving SAMI3 input parameters.</p>
Preliminary In Vivo Pulse-Acquire MRI with Concentric Ring Trajectories at 7 Tesla
<p>Pulse-Acquire MRI with Concentric Ring Trajectories, 305 Hz Readout Bandwidth, 350x350x99 Matrix,<br> voxel size 0.63x0.63x1.34 mm3, TR 60 ms, 5° FA, Acquisition Delay 5 ms, TA 13 min</p>
NEMA IQ phantom raw data GE 4-ring DMI
<p><strong>NEMA IQ phantom raw data of the 4-ring acquired on a GE DMI PET/CT at three different count levels</strong></p> <ul> <li>raw and pre-processed sinograms of NEMA IQ phantom acquisition with 3e6, 1e7 and 1e8 prompt counts</li> <li>for each count (noise) level we provide 5 data sets that were unlisted from a very long listmode file with 1e9 prompt counts</li> <li>each unlisted data set (5 for each count level) contains:<br> - subfolder "raw" with the original unlisted emission sinogram + dicom header<br> - subfolder "duetto_workdir" with the pre-processed emission and correction sinograms<br> - subfolder "duetto_workdir/offline3D" example TOF-OSEM reconstruction in dicom format</li> <li>attenuation CT "CTAC" in dicom format</li> <li>high resolution CT "CT_detail" in dicom format</li> <li>the ratio of the activity concentrations of the "hot" spheres and the background was 4.82</li> </ul> <p> </p>
Fig. 4 in Regional Recaptures Of Bats (Chiroptera, Vespertilionidae) Ringed In Eastern Ukraine
Fig. 4. Map of recaptures of N. noctula in Kharkiv Region (recaptures N 24 and 51), and the farthest recapture (N 50) from Kharkiv Region to Luhansk Region (research polygon N 3 according to fig. 1).
Fig. 1 in Regional Recaptures Of Bats (Chiroptera, Vespertilionidae) Ringed In Eastern Ukraine
Fig. 1. Map of Kharkiv Region with territories of main recaptures: 1 — recaptures within Kharkiv City and surroundings; 2 — recaptures in NNP "Homilsha Forest"; 3 — recaptures outside of Kharkiv Region.
When is a Ring Road a 'Ring Road'? - results of the survey
<p>Images and results from the survey described in the paper "When is a Ring Road a 'Ring Road'? A Brief Perceptual Study".</p>
Rings in Clinical Trials and Drugs: Present and Future - Datasets
<p>"Rings in Clinical Trials and Drugs: Present and Future" - Datasets from publication in Journal of Medicinal Chemistry</p>
Thermal Burst on the Ring Nebula M57
<p>The observation on Ring Nebula (M57) mainly studied its circumnuclear structure. The signal noise process is identified to be in the range of 8.2 - 36.9 K. The thermonuclear reaction caused a globular shockwave in the observation, and similar structure of black & white hole seed collision is observed as the ring (singularity). However, even with the polarized ring, exotic metal-insulator creation is not expected without the black hole being charged. With the circumnuclear spin of the ring, the black hole type therein is identified as a Kerr. The thermal process of reionization from around -10 K to positive temperature with eruption noises suggest minor collision could have occurred around the temperature of 0 K. The effect of the ring from the eruption is implies that lower temperatures persist in the undetected region of the structure.</p>
Supplementary Movies and Dataset for Debris Flows, Debris Avalanches and Rock Avalanches Impacting A Flexible Ring Net Barrier.
<p>The supplementary movies S1, S2, and S3 (presented in Figures 1, S4, and S6) show typical debris flow, debris avalanche, and rock avalanche impacting a flexible ring net barrier with = 6 m/s, respectively.</p> <p>The experimental data used for comparison in Figure 2b from the large-scale flume test V6-B1 with a flexible ring net barrier was published open access in the below article (Vicari <em>et al.,</em> 2021).</p> <p>Vicari, H., Ng, C. W., Nordal, S., Thakur, V., De Silva, W. R. K., Liu, H., & Choi, C. E. (2021). The Effects of Upstream Flexible Barrier on the Debris Flow Entrainment and Impact Dynamics on a Terminal Barrier. <em>Canadian Geotechnical Journal</em>, <em>59</em>(6), 1007-1019. <a href="https://doi.org/10.1139/cgj-2021-0119">https://doi.org/10.1139/cgj-2021-0119</a></p>
Supplementary Information for "G-type Halohydrin Dehalogenases Catalyze Ring Opening Reactions of Cyclic Epoxides with Diverse Anionic Nucleophiles"
<p>This is the external Supplementary Information for our publication "G-type Halohydrin Dehalogenases Catalyze Ring Opening Reactions of Cyclic Epoxides with Diverse Anionic Nucleophiles".</p> <p>The .zip files contain the raw NMR data for all compounds as well as the protein structural data described in the manuscript.</p>
Code and data related to semi-synchronous growth changes and the similarity of tree-ring patterns
<p>This dataset contains the data and code related to Visser, RM. 2021 On the similarity of tree-ring patterns: Assessing the influence of semi-synchronous growth changes on the Gleichläufigkeitskoeffizient for big tree-ring data sets. <em>Archaeometry 63(1)</em>: 204–215. DOI: <a href="https://doi.org/10.1111/arcm.12600">https://doi.org/10.1111/arcm.12600</a>.</p>
Text-fig. 10. Platanoxylon cf. haydenii, a, e, h: UF 279-34470; b, c, d, f g: UF 279-34469. a, b: Diffuse porous wood with vessels solitary and in small multiples, which are mostly tangential or oblique, diffuse and diffuse-in-aggregates axial parenchyma., TS. c–e: Scalariform perforation plates. f, g: Opposite intervessel pits, TLS. h: Two size classes of rays, TLS. Platanus sp., UF 279- 24552. i: Predominantly solitary vessels, diffuse and diffuse-in-aggregates parenchyma, growth ring boundary distinct, noded rays, TS. j: Simple perforation plates (PP), RLS. k: Body of ray with procumbent ray cells, RLS. l: Scalariform perforation plate, RLS. m: Rays of two sizes, wide rays>10-seriate, TLS. Scale bars: 200 µm in a, b, h, i, m; 100 µm in j, k: 50 µm in c, d, e, f, l. in A Diverse Assemblage Of Late Eocene Woods From Oregon, Western Usa
Text-fig. 10. Platanoxylon cf. haydenii, a, e, h: UF 279-34470; b, c, d, f g: UF 279-34469. a, b: Diffuse porous wood with vessels solitary and in small multiples, which are mostly tangential or oblique, diffuse and diffuse-in-aggregates axial parenchyma., TS. c–e: Scalariform perforation plates. f, g: Opposite intervessel pits, TLS. h: Two size classes of rays, TLS. Platanus sp., UF 279- 24552. i: Predominantly solitary vessels, diffuse and diffuse-in-aggregates parenchyma, growth ring boundary distinct, noded rays, TS. j: Simple perforation plates (PP), RLS. k: Body of ray with procumbent ray cells, RLS. l: Scalariform perforation plate, RLS. m: Rays of two sizes, wide rays>10-seriate, TLS. Scale bars: 200 µm in a, b, h, i, m; 100 µm in j, k: 50 µm in c, d, e, f, l.
Text-fig. 11. Acer Post Hammer species 1, UF 279-34456. a, b: Diffuse-porous wood with distinct growth rings, marked by marginal parenchyma, vessels solitary and in short radial multiples, TS. c: Crowded alternate intervessel pits, TLS. d: Simple perforation plates, helical thickenings in vessel elements, TLS. e: Rays 2–3-seriate, gum deposit in vessel element, TLS. Acer Post Hammer species 2. UF 279-34466. f: Diffuse-porous wood with distinct growth rings, marked by marginal parenchyma, vessels solitary and in short radial multiples, TS. g: Alternate intervessel pits, helical thickenings in vessel elements, TLS. h: Rays 1–4(–5)-seriate, TLS. i: Crystalliferous strand, multiseriate ray, TLS. Trochodendron beckii, UF 279-24558. j, k: Distinct growth rings, abrupt transition from earlywood to latewood, vesselless, wide rays noded at growth ring boundaries, TS. l: Rays of two distinct sizes, uniseriate and multiseriates>10-seriate, TLS. m. Scalariform intertracheary pits. RLS. Scale bars: 500 µm in j; 200 µm in a, f, k, l; 100 µm in b, h; 50 µm in c, d, e, g, i, m. in A Diverse Assemblage Of Late Eocene Woods From Oregon, Western Usa
Text-fig. 11. Acer Post Hammer species 1, UF 279-34456. a, b: Diffuse-porous wood with distinct growth rings, marked by marginal parenchyma, vessels solitary and in short radial multiples, TS. c: Crowded alternate intervessel pits, TLS. d: Simple perforation plates, helical thickenings in vessel elements, TLS. e: Rays 2–3-seriate, gum deposit in vessel element, TLS. Acer Post Hammer species 2. UF 279-34466. f: Diffuse-porous wood with distinct growth rings, marked by marginal parenchyma, vessels solitary and in short radial multiples, TS. g: Alternate intervessel pits, helical thickenings in vessel elements, TLS. h: Rays 1–4(–5)-seriate, TLS. i: Crystalliferous strand, multiseriate ray, TLS. Trochodendron beckii, UF 279-24558. j, k: Distinct growth rings, abrupt transition from earlywood to latewood, vesselless, wide rays noded at growth ring boundaries, TS. l: Rays of two distinct sizes, uniseriate and multiseriates>10-seriate, TLS. m. Scalariform intertracheary pits. RLS. Scale bars: 500 µm in j; 200 µm in a, f, k, l; 100 µm in b, h; 50 µm in c, d, e, g, i, m.
Text-fig. 9. Wataria kvacekii sp. nov., UF 279-24556. a: Wood ring-porous, earlywood with 2–3 rows of wide pores, vessels solitary and in radial multiples of 2, axial parenchyma scanty vasicentric and some apotracheal diffuse-in-aggregates, TS. b: Series of vessel elements with simple perforations, axial parenchyma strands adjacent to vessels, RLS. c: Alternate intervessel pitting, vessel element end walls horizontal, RLS. d: Vessel-axial parenchyma pitting similar to intervessel pitting, RLS. e, f: Rays with tile cells, storied axial parenchyma, some strands chambered crystalliferous, TLS. g: Detail of ray, TLS. h: Storied imperforate elements. Scale bars: 200 µm in a; 100 µm in b, e; 50 µm in c, d, f, h; 20 µm in g. in A Diverse Assemblage Of Late Eocene Woods From Oregon, Western Usa
Text-fig. 9. Wataria kvacekii sp. nov., UF 279-24556. a: Wood ring-porous, earlywood with 2–3 rows of wide pores, vessels solitary and in radial multiples of 2, axial parenchyma scanty vasicentric and some apotracheal diffuse-in-aggregates, TS. b: Series of vessel elements with simple perforations, axial parenchyma strands adjacent to vessels, RLS. c: Alternate intervessel pitting, vessel element end walls horizontal, RLS. d: Vessel-axial parenchyma pitting similar to intervessel pitting, RLS. e, f: Rays with tile cells, storied axial parenchyma, some strands chambered crystalliferous, TLS. g: Detail of ray, TLS. h: Storied imperforate elements. Scale bars: 200 µm in a; 100 µm in b, e; 50 µm in c, d, f, h; 20 µm in g.
Text-fig. 8. Pterocaryoxylon sp., a–c, e: UF 279-85024; d, f: UF 279-24551. a, b: Wood semi-ring-porous, vessels solitary and in short radial multiples, axial parenchyma scanty vasicentric, marginal, and in narrow lines, TS. c: Crowded alternate intervessel pitting, simple perforation plate (PP), TLS. d: Vessel-axial parenchyma pitting similar to intervessel pitting, RLS. e: Rays mostly 1–3 cells wide, occasionally 4 cells, uniseriate rays probably mostly square to upright cells, TLS. f: Rays heterocellular, body cells procumbent. Scale bars: 200 µm in a, b; 100 µm in e, f; 50 µm in c; 20 µm in d. in A Diverse Assemblage Of Late Eocene Woods From Oregon, Western Usa
Text-fig. 8. Pterocaryoxylon sp., a–c, e: UF 279-85024; d, f: UF 279-24551. a, b: Wood semi-ring-porous, vessels solitary and in short radial multiples, axial parenchyma scanty vasicentric, marginal, and in narrow lines, TS. c: Crowded alternate intervessel pitting, simple perforation plate (PP), TLS. d: Vessel-axial parenchyma pitting similar to intervessel pitting, RLS. e: Rays mostly 1–3 cells wide, occasionally 4 cells, uniseriate rays probably mostly square to upright cells, TLS. f: Rays heterocellular, body cells procumbent. Scale bars: 200 µm in a, b; 100 µm in e, f; 50 µm in c; 20 µm in d.
Text-fig. 7. Hamamelidoxylon crystalliferum sp. nov., UF 279-34464. a: Diffuse porous wood with exclusively solitary vessels, tending to be angular in outline, TS. b: Growth ring boundary, marked by radially narrowed fibers, latewood vessels narrower than earlywood vessels of the next ring, fibers thick-walled, no axial parenchyma visible, TS. c: Scalariform intervessel pits in narrow vessel (left), fibers with distinctly bordered pits, TLS. d: Scalariform perforation plate, tyloses (T) formation from marginal ray cell, TLS. e: Scalariform perforation plates with fewer than 15 bars (PP), RLS. f: Vessel-ray parenchyma pits with in A Diverse Assemblage Of Late Eocene Woods From Oregon, Western Usa
Text-fig. 7. Hamamelidoxylon crystalliferum sp. nov., UF 279-34464. a: Diffuse porous wood with exclusively solitary vessels, tending to be angular in outline, TS. b: Growth ring boundary, marked by radially narrowed fibers, latewood vessels narrower than earlywood vessels of the next ring, fibers thick-walled, no axial parenchyma visible, TS. c: Scalariform intervessel pits in narrow vessel (left), fibers with distinctly bordered pits, TLS. d: Scalariform perforation plate, tyloses (T) formation from marginal ray cell, TLS. e: Scalariform perforation plates with fewer than 15 bars (PP), RLS. f: Vessel-ray parenchyma pits with
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.