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2,318 results for “Synthesis”
Data for: Cdt1 inhibits CMG helicase in early S phase to separate origin licensing from DNA synthesis
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Quantum-inspired computational wavefront shaping enables turbulence-resilient distributed aperture synthesis imaging
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Data from: Live-cell analysis of IMPDH protein levels during yeast colony growth provides insights into the regulation of GTP synthesis
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A global synthesis on land-cover changes in watersheds shaping freshwater detrital food webs
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Data from: Revised evolutionary and taxonomic synthesis for parrots (order: Psittaciformes) guided by phylogenomic analysis
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Distance functions of carabids in crop fields depend on functional traits, crop type and adjacent habitat: a synthesis
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Supporting data and software for: Low-temperature open-air synthesis of PVP-coated NaYF4:Yb,Er,Mn upconversion nanoparticles with strong red emission
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A new approach to geostatistical synthesis of historical records reveals capuchin spatial responses to climate and demographic change
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International Long-Term Ecological Research Network (ILTER) Atmospheric Deposition and Stream Nitrogen Synthesis
We identified variables controlling stream nitrogen concentrations and fluxes, and how they have changed over time, by synthesizing 20 time series ranging from 5 to 51 years of data collected from forest and grassland dominated watersheds across Europe, North America, and East Asia and across four climate types (tropical, temperate, Mediterranean, and boreal) using the International Long-Term Ecological Research Network. We found declining trends in bulk ammonium and nitrate deposition, with ammonium contributing significantly more to atmospheric nitrogen deposition over time. Among sites, there were significant positive relationships between (1) precipitation and stream ammonium and nitrate fluxes and (2) atmospheric nitrogen inputs and stream nitrogen concentrations and fluxes. There were no significant relationships between air temperature and stream nitrogen export. Our long-term data shows that although nitrogen deposition is declining over time, atmospheric nitrogen inputs and precipitation remain the main predictors for nitrogen exported from forested and grassland watersheds. Overall, we also demonstrate that long-term monitoring provides understanding of ecosystems and biogeochemical cycling that would not be possible with short-term studies alone. Acknowledgements: We thank the organizers and funders of the ILTER Nitrogen Initiative Training Course and Workshop in Hokkaido, Japan in June 2016, which brought together many of the participants in this project. Templer was supported by a US National Science Foundation LTER grant NSF DEB 1637685. McDowell was supported by US National Science Foundation LTER grant NSF DEB 1831592. We are grateful to the EU Horizon 2020 funded eLTER PLUS project (Grand Agreement No. 871128) for financial support to Haase and Dirnböck. Dirnböck was also funded by the LTER-CWN project (FFG project number 858024). This study was partly supported by the Research Initiative Grants of the ILTER, Grants-in-Aid for Scientific Research (1
SOils DAta Harmonization database (SoDaH): an open-source synthesis of soil data from research networks
This SOils DAta Harmonization (SoDaH) database is designed to bring together soil carbon data from diverse research networks into a harmonized dataset that can be used for synthesis activities and model development. The research network sources for SoDaH span different biomes and climates, encompass multiple ecosystem types, and have collected data across a range of spatial, temporal, and depth gradients. The rich data sets assembled in SoDaH consist of observations from monitoring efforts and long-term ecological experiments. The SoDaH database also incorporates related environmental covariate data pertaining to climate, vegetation, soil chemistry, and soil physical properties. The data are harmonized and aggregated using open-source code that enables a scripted, repeatable approach for soil data synthesis.
Elucidation of the Atroposelectivity in the Synthesis of Axially Chiral Thiohydantoin Derivatives
<p>Recently, Sarigul and Dogan have synthesized a number of enantiomerically enriched axially chiral atropoisomeric 2-thiohydantoins by the reaction of L-amino acid ester salts and <em>o</em>-aryl isothiocyanates in the presence of triethyl amine (TEA) in dichloromethane. The nonaxially chiral derivative 5-methyl-3-phenyl-2-thiohydantoin gave a racemic product whereas the axially chiral 5-methyl-3-<em>o</em>-bromophenyl-2-thiohydantoin was less prone to racemize at C<sub>5</sub> of the heterocyclic ring. In this study, we present a computational study (M06-2X/6-311+G(d,p) for C, H, O, N and S; M06-2X/6-311++G(3df,3pd) for Br) in order to propose plausible mechanisms for the racemization and cyclization steps for 2-thiohydantoin derivatives. The study includes rationalization based on steric as well as the electrostatic effects to elucidate the epimerization differences at C<sub>5</sub>.</p>
Data and code for figures: Ultralow-Noise Photonic Microwave Synthesis using a Soliton Microcomb-based Transfer Oscillator
<p>This repository contains the data and code for the paper "Ultralow-Noise Photonic Microwave Synthesis using a Soliton Microcomb-based Transfer Oscillator".</p>
Fig. 1 in Tortonian teleost otoliths from northern Italy: taxonomic synthesis and stratigraphic significance
Fig. 1. Map showing the sampling sites.
Recording of workshop: Open Synthesis: Open Science in Evidence Synthesis
<p>Recording of the session "Open Synthesis: Open Science in Evidence Synthesis" chaired by Dr Elaine Toomey. Further details of the workshop can be found here: <a href="https://evidencesynthesisireland.ie/opensynthesis/">https://evidencesynthesisireland.ie/opensynthesis</a></p> <p>Dr <a href="https://evidencesynthesisireland.ie/team-member/dr-elaine-toomey/">Elaine Toomey</a> is Associate Director of <a href="https://ireland.cochrane.org/">Cochrane Ireland</a> within <a href="https://evidencesynthesisireland.ie/">Evidence Synthesis Ireland</a> based in the National University of Ireland Galway. Her research primarily focuses on methods used in the development, evaluation and implementation of health behaviour change interventions, particularly in relation to the treatment and prevention of chronic disease. She has specific expertise in implementation science, evidence synthesis, process evaluation and exploring the fidelity and adaptation of behaviour change interventions.</p> <p>Elaine is a member of the <a href="https://www.hrb.ie/">Health Research Board (HRB)</a> <a href="https://hrbopenresearch.org/advisors">Open Research National Steering Committee</a>, Co-Chair of the <a href="https://ehps.net/special-interest-groups/">European Health Psychology Society Open Science Special Interest Group</a> and a Catalyst for the Berkeley Initiative for Transparency in the Social Sciences (<a href="https://www.bitss.org/">BITSS</a>). In 2016 Elaine was awarded a Leamer-Rosenthal Prize for Open Social Science for Emerging Researchers from the University of California Berkeley for her work in fidelity and transparency of behaviour change interventions, and has been shortlisted for a <a href="https://www.esof.eu/en/news-reader/id-9th-call-for-the-2020-european-young-researchers-award-is-now-open.html">European Young Researcher Award 2020</a>.</p> <p>The presentation was part of the <a href="http://www.nuigalway.ie/osw/">Open Scholarship Week 2020</a>. It can also be viewed at <a href="https://www.youtube.com/watch?v=fANpI4xX-lk">https://www.youtube.com/watch?v=fANpI4xX-lk</a> or <a href="https://nuigalway.mediaspace.kaltura.com/media/Open+SynthesisA+Open+Science+in+Evidence+Synthesis/1_rdli41as/121659351">https://nuigalway.mediaspace.kaltura.com/media/Open+SynthesisA+Open+Science+in+Evidence+Synthesis/1_rdli41as/121659351</a></p>
Towards a Realistic Explosion Landscape for Binary Population Synthesis
<p>Data from:</p> <p> Towards a Realistic Explosion Landscape for Binary Population Synthesis</p> <p> by</p> <p> Patton, Rachel A. and Sukhbold, Tuguldur<br> (2020).</p> <p> (Submitted to MNRAS)</p> <p>- Detailed descriptions of calculations are provided in the paper, but<br> please feel free to get in touch with any of us with questions, or<br> if you need something that is not provided here.</p> <p>Contacts:<br> Rachel Patton = patton[dot]502[at]osu[dot]edu<br> Tuguldur Sukhbold = tuguldur[dot]s[at]gmail[dot]com<br> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -</p> <p>Below are brief descriptions of each dataset. More details can be found in the paper.</p> <p>kepler_table.tar.gz (1.0GB)<br> -These are tables for our entire set of 3496 KEPLER CO-core models, containing the final presupernova structure and composition quantities for each zone. Core masses range from 2.5 to 10.0 in increments of 0.1 Msun and the initial composition ranges from 5% carbon and 95% oxygen to 50% carbon and oxygen, in incrmeents of 1%. Each file has the naming convention "mA_B.ktbl" where A is the core mass in Msun (2.5, 2.6, etc.) and B represents the initial carbon mass fraction as the number of increments of 0.01 taken from 0.05 (5%). For example, the file 'm8.0_27.ktbl' would be for an 8 Msun core with an initial carbon mass fraction of 0.32 (= 0.05 + 27*0.01).</p> <p>kepler_datatset.tar.gz (30.4KB)<br> -This folder contains four tables listing the presupernova parameters evaluated from all of our KEPLER CO-cores: M_fe, the iron core mass, M4, the mass enclosed where the entropy per baryon reaches 4 Kb, mu_4, the radial gradient of mass at the location of M4, and xi_2.5, the compactness parameter. See section#3 of our paper for details on how these were evaluated. Columns represent each CO-core mass and rows represent starting carbon mass fraction.</p> <p>inlist (2.8KB)<br> -This is the inlist used to create 760 MESA (version 7624) CO-core models, presented in section#4.1. The only thing that changes between models is the CO-core mass, set by 'initial_mass' and the composition, set by 'accretion_species_xa(1)' and 'accretion_species_xa(2)'. In our grid, we covered the same mass and composition range as the KEPLER models, keeping the same mass increment but increasing the carbon mass increment from 0.01 to 0.05.</p>
Data from: A synthesis of the coast-wide decline in survival of west coast Chinook salmon (Oncorhynchus tshawytscha, Salmonidae)
<p>We collated smolt-to-adult return rate (SAR) data for Chinook salmon from all available regions of the Pacific coast of North America to examine the large-scale patterns of salmon survival. For consistency, our analyses primarily used coded wire tag-based (CWT) SAR estimates. Survival collapsed over the past half century by roughly a factor of three to ca. 1% for many regions. Within the Columbia River, the SARs of Snake River populations, often singled out as exemplars of poor survival, are unexceptional and in fact higher than estimates reported from many other regions of the west coast lacking dams. Given the seemingly congruent decline in SARs to similar levels, the notion that contemporary survival is driven primarily by broader oceanic factors rather than local factors should be considered. Ambitious Columbia River rebuilding targets may be unachievable because other regions with nearly pristine freshwater conditions, such as SE Alaska and northern BC, also largely fail to reach these levels. Passive integrated transponder (PIT) tag-based SAR estimates available for Columbia River basin populations are generally consistent with CWT findings; however, PIT tag-based SARs are not adjusted for harvest which compromises their intended use because harvest rates are large and variable. More attention is needed on how SARs should be quantified and how rebuilding targets are defined. We call for a systematic review by funding agencies to assess consistency and comparability of the SAR data generated and to further assess the implications of survival falling to similar levels in most regions of the west coast.</p>
Dataset for Manthan: A Data Driven Approach for Boolean Function Synthesis (CAV-20 paper)
<p>The data set consists of 609 benchmarks used for experimental evaluation of <a href="https://arxiv.org/abs/2005.06922">paper</a> titled 'Manthan: A Data-Driven Approach for Boolean Function Synthesis" published in International Conference of Computer-Aided Verification (CAV), 2020 . The benchmarks are from following sources:</p> <ul> <li>Prenex-2QBF track of<a href="http://www.qbflib.org/qbfeval17.php"> QBFEval-17</a> and <a href="http://www.qbflib.org/qbfeval18.php">QBFEval-18</a></li> <li>Arithmetic set (Srivastava, Gulwani, Foster 2013).</li> <li>Disjunctive set (Akshay, Charkraborty, John, Shah 2017).</li> <li>Factorization set (Akshay, Charkraborty, John, Shah 2017).</li> </ul>
Data from: Cu-Al mixed oxide-catalysed multicomponent synthesis of gluco- and allofuranose-linked 1,2,3-triazole derivatives
<p><span>A series of carbohydrate linked-1,2,3-triazole derivatives were synthetized in good yields from glucofuranose and allofuranose diacetonides using as key step a three-component 1,3-dipolar azide-alkyne cycloaddition catalyzed by a Cu-Al mixed oxide. In this multicomponent reaction, Cu-Al mixed oxide/sodium ascorbate system serves as highly reactive, recyclable and efficient heterogeneous catalyst for regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles. The reported protocol has significant advantages over classical CuI/DIPEA or CuSO<sub>4</sub>/sodium ascorbate conditions in terms of efficiency and reduced synthetic complexity. In addition, the selective deprotection of synthesized di-<i>O</i>-isopropylidene derivatives was also carried out leading to the corresponding mono-<i>O</i>-isopropylidene products in moderate yields. Some of the synthesized triazole glycoconjugates were tested for their <em>in vitro</em> antimicrobial activity using the disk diffusion method against Gram-positive bacteria (<i>Staphylococcus aureus</i> and <i>Bacillus subtilis</i>), Gram-negative bacteria (<i>Escherichia coli</i> and <i>Pseudomonas aeruginosa</i>), as well as fungus (<i>Aspergillus niger</i>) and yeast (<i>Candida utilis</i>). The results revealed that these compounds exhibit moderate to good antimicrobial activity mainly against Gram-negative bacteria. </span></p>
Data from: Optimisation of biogenic synthesis of silver nanoparticles from flavonoid-rich Clinacanthus nutans leaf and stem aqueous extracts
<p>BACKGROUND: Silver nanoparticles (AgNPs) are widely used in food industries, biomedical, dentistry, catalysis, diagnostic biological probes, and sensors. The use of plant extract for AgNPs synthesis eliminates the process of maintaining cell culture and the process could be scaled up under a non-aseptic environment. The purpose of this study is to determine the classes of phytochemicals, to biosynthesise and characterise the AgNPs using Clinacanthus nutans leaf and stem extracts. In this study, AgNPs was synthesised from the aqueous extracts of C. nutans leaves and stems through a non-toxic, cost effective and eco-friendly method.</p> <p>RESULTS: The formation of AgNPs was confirmed by UV-Vis spectroscopy, and the size of AgNP-L (leaf) and AgNP-S (stem) were 114 and 129 nm, respectively. Transmission electron microscopy (TEM) analysis showed spherical nanoparticles with AgNP-L and AgNP-S ranging from 10-300 nm and 10-180 nm; with zeta potentials of AgNP-L and AgNP-S at -42.8 and -43.9 mV, respectively. XRD analysis matched the face-centred cubic structure of silver and was capped with bioactive compounds. FTIR analysis revealed the presence of few functional groups of phenolic and flavonoid compounds. These functional groups act as reducing agents in AgNPs synthesis.</p> <p>CONCLUSION: This result showed that the biogenically synthesised nanoparticles reduced silver ions to silver nanoparticles in aqueous condition and the AgNPs formed were stable and less toxic.</p>
Synthesis of Vinylene-Linked Two-Dimensional Conjugated Pol-ymers via the Horner-Wadsworth-Emmons Reaction
<p>DFTB+ // mio-0-1 optimised structures of 2D-PPQV1 and 2D-PPQV2. "Layer mismatch" structures were optimized with fixed unit cells.</p>
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.