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4,010 results for “STABILITY”
Data from: Soil aggregate stability and grassland productivity associations in a northern mixed-grass prairie
Soil aggregate stability data are often predicted to be positively associated with measures of plant productivity, rangeland health, and ecosystem functioning. Here we revisit the hypothesis that soil aggregate stability is positively associated with plant productivity. We measured local (plot-to-plot) variation in grassland community composition, plant (aboveground) biomass, root biomass, % water-stable soil aggregates, and topography. After accounting for spatial autocorrelation, we observed a negative association between % water-stable soil aggregates (0.25-1 and 1-2 mm size classes of macroaggregates) and dominant graminoid biomass, and negative associations between the % water-stable aggregates and the root biomass of a dominant sedge (Carex filifolia). However, variation in total root biomass (0-10 or 0-30 cm depths) was either negatively or not appreciably associated with soil aggregate stabilities. Overall, regression slope coefficients were consistently negative thereby indicating the general absence of a positive association between measures of plant productivity and soil aggregate stability for the study area. The predicted positive association between factors was likely confounded by variation in plant species composition. Specifically, sampling spanned a local gradient in plant community composition which was likely driven by niche partitioning along a subtle gradient in elevation. Our results suggest an apparent trade-off between some measures of plant biomass production and soil aggregate stability, both known to affect the land's capacity to resist erosion. These findings further highlight the uncertainty of plant biomass-soil stability associations.
Data from: EB Ford revisited: assessing the long-term stability of wing-spot patterns and population genetic structure of the meadow brown butterfly on the Isles of Scilly
Understanding selection in the wild remains a major aim of evolutionary ecology and work by Ford and colleagues on the meadow brown butterfly Maniola jurtina did much to ignite this agenda. A great deal of their work was conducted during the 1950s on the Isles of Scilly. They documented island-specific wing-spot patterns that remained consistent over about a decade, but patterns on some islands changed after environmental perturbation. It was suggested that these wing-spot patterns reflected island-specific selection and that there was little migration between islands. However, genetic studies to test the underlying assumption of restricted migration are lacking and it is also unknown whether the originally described wing-spot patterns have persisted over time. We therefore collected female butterflies from five of Ford's original study locations, including three large islands (St Mary's, St Martin's and Tresco) and two small islands (Tean and St Helen's). Wing-spot patterns had not changed appreciably over time on three of the islands (two large and one small), but were significantly different on the other two. Furthermore, analysis of 176 amplified fragment length polymorphisms revealed significant genome-wide differentiation among the five islands. Our findings are consistent with Ford's conclusions that despite the close proximity of these islands, there is restricted gene flow among them.
Data from: Cross-decades stability of an avian hybrid zone
Hybrid zones are particularly valuable for understanding the evolution of partial reproductive isolation between differentiated populations. An increasing number of hybrid zones have been inferred to move over time, but in most such cases zone movement has not been tested with long-term genomic data. The hybrid zone between Townsend's Warblers (Setophaga townsendi) and Hermit Warblers (S. occidentalis) in the Washington Cascades was previously inferred to be moving from northern S. townsendi southward toward S. occidentalis, based on plumage and behavioral patterns as well as a 2000-km genetic wake of hermit mitochondrial DNA (mtDNA) in coastal Townsend's Warblers. We directly tested whether hybrid zone position has changed over 2-3 decades by tracking plumage, mtDNA, and nuclear genomic variation across the hybrid zone over two sampling periods (1987-94 and 2015-16). Surprisingly, there was no significant movement in genomic or plumage cline centers between the two time periods. Plumage cline widths were narrower than expected by neutral diffusion, consistent with a "tension zone" model, in which selection against hybrids is balanced by movement of parental forms into the zone. Our results indicate that this hybrid zone is either stable in its location or moving at a rate that is not detectable over 2-3 decades. Despite considerable gene flow, the stable clines in multiple phenotypic and genotypic characters over decades suggest evolutionary stability of this young pair of sister species, allowing divergence to continue. We propose a novel biogeographic scenario to explain these patterns: rather than the hybrid zone having moved thousands of kilometers to its current position, inland Townsend's met coastal Hermit Warbler populations along a broad front of the British Columbia and Alaska coast and hybridization led to replacement of the Hermit Warbler plumage with Townsend's Warbler plumage patterns along this coastline. Hence hybrid zones along British Columbia and Alaska moved only a short distance from the inland to the coast, whereas the Hermit Warbler phenotype appears stable in Washington and further south. This case provides an example of the complex biogeographic processes that have led to the distribution of current phenotypes within and among closely related species.
Data from: A comparative study of ancient sedimentary DNA, pollen and macrofossils from permafrost sediments of northern Siberia reveals long-term vegetational stability
Although ancient DNA from sediments (sedaDNA) has been used to investigate past ecosystems, the approach has never been directly compared to the traditional methods of pollen and macrofossil analysis. We conducted a comparative survey of 18 ancient permafrost samples spanning the Late Pleistocene (46–12.5 thousand years ago), from the Taymyr Peninsula in northern Siberia. The results show that pollen, macrofossils and sedaDNA are complementary rather than overlapping, and in combination reveal more detailed information on plant palaeocommunities than can be achieved by each individual approach. SedaDNA and macrofossils share greater overlap in plant identifications than with pollen, suggesting that sedaDNA is local in origin. These two proxies also permit identification to lower taxonomic levels than pollen, enabling investigation of temporal changes in species composition and the determination of indicator species to describe environmental changes. Combining data from all three proxies, reveals an area continually dominated by a mosaic vegetation of tundra-steppe, pioneer and wet-indicator plants. Such vegetational stability is unexpected, given the severe climate changes taking place in the northern hemisphere during this time, with changes in average annual temperatures of > 22ºC. This may explain the abundance of ice-age mammals such as horse and bison in Taymyr Peninsula during the Pleistocene, and why it acted as a refugium for the last mainland woolly mammoth. Our finding reveals the benefits of combining sedaDNA, pollen and macrofossil for palaeovegetational reconstruction and add to the increasing evidence suggesting large areas of the northern hemisphere remained ecologically stable during the Late Pleistocene.
Data from: Patterns of cyto-nuclear linkage disequilibrium in Silene latifolia: genomic heterogeneity and temporal stability
Non-random association of alleles in the nucleus and cytoplasmic organelles, or cyto-nuclear linkage disequilibrium (LD), is both an important component of a number of evolutionary processes and a statistical indicator of others. The evolutionary significance of cyto-nuclear LD will depend on both its magnitude and how stable those associations are through time. Here, we use a longitudinal population genetic data set to explore the magnitude and temporal dynamics of cyto-nuclear disequilibria through time. We genotyped 135 and 170 individuals from 16 and 17 patches of the plant species Silene latifolia in Southwestern VA, sampled in 1993 and 2008, respectively. Individuals were genotyped at 14 highly polymorphic microsatellite markers and a single-nucleotide polymorphism (SNP) in the mitochondrial gene, atp1. Normalized LD (D′) between nuclear and cytoplasmic loci varied considerably depending on which nuclear locus was considered (ranging from 0.005–0.632). Four of the 14 cyto-nuclear associations showed a statistically significant shift over approximately seven generations. However, the overall magnitude of this disequilibrium was largely stable over time. The observed origin and stability of cyto-nuclear LD is most likely caused by the slow admixture between anciently diverged lineages within the species' newly invaded range, and the local spatial structure and metapopulation dynamics that are known to structure genetic variation in this system.
Genetics of quantitative traits with dominance under stabilizing and directional selection in partially selfing species
<p>Recurrent self-fertilization is thought to lead to reduced adaptive potential by decreasing the genetic diversity of populations, thus leading selfing lineages down an evolutionary 'blind alley'. Though well supported theoretically, empirical support for reduced adaptability in selfing species is limited. One limitation of classical theoretical models is that they assume pure additivity of the fitness-related traits that are under stabilizing selection, despite ample evidence that quantitative traits are subject to dominance. Here we relax this assumption and explore the effect of dominance on a fitness-related trait under stabilizing selection for populations that differ in selfing rates. By decomposing the genetic variance into additional components specific to inbred populations, we show that dominance components can explain a substantial part of the genetic variance of inbred populations. We also show that ignoring these components leads to an upward bias in the predicted response to selection. Finally, we show that when considering the effect of dominance, the short-term evolutionary potential of populations remains comparable across the entire gradient in outcrossing rates, and genetic associations can even make selfing populations more evolvable on the longer term, reconciling theoretical and empirical results.</p>
Data from: Reduced tillage, but not organic matter input, increased nematode diversity and food web stability in European long-term field experiments
Soil nematode communities and food web indices can inform about the complexity, nutrient flows and decomposition pathways of soil food webs, reflecting soil quality. Relative abundance of nematode feeding and life-history groups are used for calculating food web indices, i.e. maturity index (MI), enrichment index (EI), structure index (SI) and channel index (CI). Molecular methods to study nematode communities potentially offer advantages compared to traditional methods in terms of resolution, throughput, cost and time. In spite of such advantages, molecular data have not often been adopted so far to assess the effects of soil management on nematode communities and to calculate these food web indices. Here, we used high-throughput amplicon sequencing to investigate the effects of tillage (conventional vs reduced) and organic matter addition (low vs high) on nematode communities and food web indices in ten European long-term field experiments and we assessed the relationship between nematode communities and soil parameters. We found that nematode communities were more strongly affected by tillage than by organic matter addition. Compared to conventional tillage, reduced tillage increased nematode diversity (23% higher Shannon diversity index), nematode community stability (12% higher MI), structure (24% higher SI), and the fungal decomposition channel (59% higher CI), and also the number of herbivorous nematodes (70% higher). Total and labile organic carbon, available K and microbial parameters explained nematode community structure. Our findings show that nematode communities are sensitive indicators of soil quality and that molecular profiling of nematode communities has the potential to reveal the effects of soil management on soil quality.
Data from: Species asynchrony and response diversity determine multifunctional stability of natural grasslands
1. A growing body of empirical evidence has suggested that biodiversity affects the simultaneous performance of multiple ecosystem functions (that is, ecosystem multifunctionality). Given increasing environmental variability and uncertainty under global change, an emerging question is how biodiversity influences the stability of multiple functions (that is, multifunctional stability). We currently know little, however, about the determinants and mechanisms of multifunctional stability, which is of practical importance for ensuring the sustainable provision of multiple functions. 2. Here we examined mechanisms contributing to stability (quantified as the ratio of the mean to the standard deviation) of multiple functions related to ecosystem productivity and carbon sequestration, including plant aboveground and belowground productivity, litter production, gross primary productivity, and ecosystem respiration, in a large grassland biodiversity experiment in Inner Mongolia. 3. We found that community-wide species asynchrony was a strong driver to stabilize multiple functions. Community-wide asynchrony mediated the positive effects of species richness and response diversity (describing how species with similar effects on ecosystem function respond differently to environmental change) on multifunctional stability. However, species richness had a negative direct effect on multifunctional stability because, although it increased the averaged temporal mean of multiple functions, it strongly increased the averaged temporal standard deviation of multiple functions. The overall effects of species richness on multifunctional stability were thus negative, whereas those of response diversity were positive. 4. Synthesis. The studied ecosystem functions related to ecosystem productivity and carbon sequestration are important in natural grasslands across the world. We conclude that species asynchrony and response diversity, rather than species richness, are key to the ecosystem multifunctional stability. The loss of response diversity and compensatory mechanisms would likely reduce the long-term sustainability of grasslands in the face of global change.
Amber fossils demonstrate deep-time stability of Caribbean lizard communities
<p>This is the dataset for the paper Sherratt et al. 2015 (PNAS, doi: ). Included are the X-ray microtomography (micro-CT) TIFF stacks for the amber encased anole lizard fossils studied. Also included are the morphometric data for the fossil and 100 modern specimens, and the phylogenetic character matrix for the fossils and 181 species (91 morphological characters, 4873 DNA bases).</p> <p>Abstract</p> <p>Whether the structure of ecological communities can exhibit stability over macroevolutionary timescales has long been debated. The similarity of independently evolved <em>Anolis</em> lizard communities on environmentally similar Greater Antillean islands supports the notion that community evolution is deterministic. However, a dearth of Caribbean <em>Anolis</em> fossils—only three have been described to date—has precluded direct investigation of the stability of anole communities through time. Here we report on an additional 17 fossil anoles in Dominican amber dating to 15–20 My before the present. Using data collected primarily by X-ray micro computed tomography (X-ray micro-CT), we demonstrate that the main elements of Hispaniolan anole ecomorphological diversity were in place in the Miocene. Phylogenetic analysis yields results consistent with the hypothesis that the ecomorphs that evolved in the Miocene are members of the same ecomorph clades extant today. The primary axes of ecomorphological diversity in the Hispaniolan anole fauna appear to have changed little between the Miocene and the present, providing evidence for the stability of ecological communities over macroevolutionary timescales.</p>
Data of the publication: Dispersive heterodyne probing method for laser frequency stabilization based on spectral hole burning in rare-earth doped crystals by O. Gobron et al.
<p>Data corresponding to the figures of the publication "Dispersive heterodyne probing method for laser frequency stabilization based on spectral hole burning in rare-earth doped crystals" by O. Gobron et al. (https://doi.org/10.1364/OE.25.015539). A text file describes data in each compressed folder, please refer to the caption in the publication for more details. </p>
Data, Metadata, R-codes and R data files for publication "Comparative ungulate diversity and biomass change with human use and drought: implications for community stability and protected area prioritization in African savannas" by Bartzke et al. in Ecology and Evolution
<p>These files contain data and metadata for modeling ungulate diversity and biomass in the Maasai Mara ecosystem in Kenya in the drought year of 1999 and a year with normal rainfall, 2002. The files also contain R codes and R data files.</p> <p>Metadata.pdf: Metadata for files "mc_333m.csv" and "mc_1km.csv"</p> <p>mc_333m.csv: A data file for 333-meter-by-333-meter sub-blocks.</p> <p>prepare_data.r: R code to impute missing vegetation records in 333-meter-by-333-meter subblocks and summarize the data over 1-kilometer-by-1-kilometer blocks for analysis.</p> <p>krige_vegetation.RData: An R data file containing the imputed vegetation records.</p> <p>mc_1km.csv: A data file for 1-kilometer-by-1-kilometer blocks for analysis.</p> <p>mc_1km.r: R code for modeling ungulate diversity and biomass; mc_1km_mod.RData: An R data file for loading the ungulate diversity and biomass models.</p> <p>mc_1km.RData: An R data file containing model predictions of ungulate diversity and biomass.</p> <p>mc_1km_plots.r: R code for plotting model predictions of ungulate diversity and biomass.</p> <p>MMNR_boundary.shp: A shapefile of the Maasai Mara National Reserve boundary in Kenya and associated files. These files are used for plotting the predictions of ungulate diversity and biomass.</p> <p>MMNR_border.zip: A shapefile and associated files for the Maasai Mara National Reserve border with Tanzania. These files are also used for plotting predictions of ungulate diversity and biomass.</p>
Formation and Stability of Salty Soil Seals in Mars-like Conditions. Implications for Methane Variability on Mars.
<p>This is a raw data (Excel Tables) for Figures 4,5,7 in our manuscript: "Formation and Stability of Salty Soil Seals in Mars-like Conditions. Implications for Methane Variability on Mars".</p><p> </p>
Surface chemistry dictates the enhancement of luminescence and stability of InP QDs upon c-ALD ZnO hybrid shell growth
<p>Indium phosphide quantum dots (InP QDs) are a promising example of RoHS (Restriction of Hazardous Substances) compliant light-emitting materials. However, they suffer from low quantum yield and instability upon processing under ambient conditions. Colloidal atomic layer deposition (c-ALD) has been recently proposed as a methodology to grow hybrid materials including QDs and organic/inorganic oxide shells, which possess new functions compared to the as-synthesized QDs. Here, we demonstrate that ZnO shells can be grown on InP QDs obtained via two synthetic routes, which are the classical sylilphosphine-based and the more recently developed aminophosphine-based one. We find that the ZnO shell increases the photoluminescence emission significantly only in the case of aminophosphine-based InP QDs. We rationalize this result with the different chemistry involved in the nucleation step of the shell and the resulting surface defect passivation. Furthermore, we demonstrate that the ZnO shell prevents degradation of the InP QD suspension under ambient conditions by avoiding moisture induced ligand displacement from their surface. Overall, this study proposes c-ALD as a methodology for the synthesis of alternative InP-based core@shell QDs and provides insight into the surface chemistry that results in both enhanced photoluminescence and stability required for application in optoelectronic devise and bio-imaging.</p> <p> </p>
Gauge data repository for "Comprehensive evaluation and comparison of ten precipitation products in terms of accuracy and stability over a typical mountain basin, Southwest China"
<h4>1. Title: </h4> <p>Gauge data repository for "Comprehensive evaluation and comparison of ten precipitation products in terms of accuracy and stability over a typical mountain basin, Southwest China".</p> <h4>2. Corresponding author: </h4> <p>Xingbi Lei (leixingbi@st.gxu.edu.cn, leixingbi@foxmail.com).</p> <h4>3. Institution: </h4> <p>Key Laboratory of Disaster Prevention and Structural Safety of the Ministry of Education, Nanning 530000, China;</p> <p>College of Architecture and Civil Engineering, Guangxi University, Nanning 530000, China; </p> <p>Guangxi Provincial Engineering Research Center of Water Security and Intelligent Control for Karst Region, Guangxi University, Nanning 530000, China; </p> <p>Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530000, China; </p> <p>State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 200029, China; </p> <p>Guangxi Water & Power Design Institute Co., Ltd., Nanning 530023, China. </p> <h4>4. Description:</h4> <p>This repository contains gauge data for the research article "Comprehensive evaluation and comparison of ten precipitation products in terms of accuracy and stability over a typical mountain basin, Southwest China", which is currently under review for the journal "Atmospheric Research".</p> <p>The gauge data used in this study is the daily measurements (2003/01/01-2018/12/31) of 12 stations in the Chengbi River Basin (Southwest China). The data source was the Chengbi River Reservoir Bureau. The data has been quality controlled by the Bureau in accordance with "MWR, PRC,2015. Specification for precipitation observations: SL 21-2015". Please see the journal article for more detailed information.</p> <h4>5. Citation:</h4> <p>When using this dataset, please cite "Mo, C. et al., 2024. Comprehensive evaluation and comparison of ten precipitation products in terms of accuracy and stability over a typical mountain basin, Southwest China. Atmospheric Research, 297: 107116.10.1016/j.atmosres.2023.107116". </p> <p> </p>
Modeling Glioma Oncostreams In Vitro: Spatiotemporal Dynamics of their Formation, Stability, and Disassembly
<p>Movie 1 of 16 is a supplementary material for the manuscript 'Modeling Glioma Oncostreams In Vitro: Spatiotemporal Dynamics of their Formation, Stability, and Disassembly.' It visually demonstrates the effect of various treatments on the formation and dynamics of oncostreams in high-grade glioma cells. The time-lapse videos provide insightful observations into how various pharmacological drugs influence the initial formation and structural dynamics of oncostreams."</p> <p>It aims to enhance the understanding of the foundational stages of oncostream formation in glioma cells and their response to various pharmacological treatments, supporting the findings discussed in the manuscript.</p> <p>Individual Movie Descriptions:</p> <p><strong>Movie 1: Low Density Oncostream Dynamics: </strong>Demonstrates the formation and dynamics of oncostreams in GFP+ NPA glioma cells at low seeding density (1 × 10^5 cells), over 24 hours using time-lapse confocal imaging.</p> <p><strong>Movie 2: High Density Oncostream Dynamics:</strong> Explores the effect of high cell seeding density (2 × 10^5 cells) on the formation and behavior of oncostreams in GFP+ NPA glioma cells, analyzed over 24 hours.</p> <p><strong>Movie 3: Spatiotemporal Progression of Oncostreams:</strong> Showcases the sequential self-formation and developmental stages of oncostreams over a 24-hour period.</p> <p><strong>Movie 4: Collagenase Impact on Oncostreams:</strong> Description: Illustrates the disassembly of aggressive and malignant oncostreams with 15 U/ml collagenase treatment over 15 hours.</p> <p><strong>Movie 5: TC-I-15 Inhibition of Oncostream Formation:</strong> Details the impact of TC-I-15, an integrin antagonist, on adhesion and oncostream formation in glioma cells, recorded over 20 hours.</p> <p><strong>Movie 6: Cytochalasin D Disruption of Oncostreams:</strong> Captures the effect of Cytochalasin D on oncostream formation by inhibiting actin polymerization, observed over a 1-hour period with rapid imaging intervals.</p> <p><strong>Movie 7: Myosin II Inhibition in Oncostreams with p-nitro Blebbistatin: </strong>Presents the influence of p-nitro Blebbistatin on oncostream formation by inhibiting myosin II, documented over 1 hour with dynamic cellular responses.</p> <p><strong>Movie 8: Control - Oncostream Formation without BAPTA-AM:</strong> Demonstrates oncostream formation and dynamics without BAPTA-AM treatment, monitored over 16 hours.</p> <p><strong>Movie 9: BAPTA-AM (Calcium Modulation) Impact on Oncostream Formation:</strong> Reveals the effects of BAPTA-AM treatment on oncostream dynamics, observed over a 16-hour period.</p> <p><strong>Movie 10: Glutamate Influence on Oncostreams:</strong> Shows the effects of glutamate treatment on oncostream formation and dynamics, monitored over 16 hours.</p> <p><strong>Movie 11: Histamine Impact on Oncostream Dynamics:</strong> Demonstrates the influence of histamine on the formation and behavior of oncostreams, captured over a 16-hour period.</p> <p><strong>Movie 12: Oncostream Formation on Non-Laminin Coated Surfaces:</strong> Illustrates the compromised organization of oncostreams on poly-D-lysine coated dishes without laminin, observed over 45 hours.</p> <p><strong>Movie 13: 4-HAP Treatment Effect on Oncostreams:</strong> Shows the impact of 4-HAP treatment on the structure of oncostreams, monitored over 20 hours.</p> <p><strong>Movie 14: Rho-Activator I Untreated Control:</strong> Presents the formation and dynamics of oncostreams without Rho-Activator I treatment, recorded over 16 hours.</p> <p><strong>Movie 15: Rho-Activator I Influence on Oncostreams Dynamics:</strong> Details the effects of Rho-Activator I on oncostream formation and dynamics, observed over a 16-hour period.</p> <p><strong>Movie 16: Rho-Inhibitor Effect on Oncostreams Dynamics:</strong> Demonstrates the impact of Rho-Inhibitor on the formation and behavior of oncostreams, monitored over 16 hours.</p>
The stability of competitive metacommunities is insensitive to dispersal connectivity in a fluctuating environment
<p>This repository contains four archived folders: 1) all the codes and parameter sets for the simulations, 2) codes to analyse and visualise the simulation outputs, 3) simulation output files and other data files necessary for the analysis, and 4) library management files for julia lang. Please refer to README.txt for the descriptions of the files.</p>
Interactions of the Ionic Liquid [C2C1Im][DCA] with Au(111) Electrodes: Interplay between Ion Adsorption, Electrode Structure and Stability
Open the record for dataset details and reuse information.
Data from: Synthesis of low-molecular weight itaconic acid polymers as nanoclay dispersants and dispersion stabilizers
<p>The upload contains data associated with the publication, including raw data in the original file format whenever possible. Dataset content: SAXS, NMR, rheology, cryo-TEM, LC-MS.</p> <p>This work was financially supported by the Lead Agency bilateral a Czech-Polish project provided by the Czech Science Foundation (21-07004K) and National Science Center Poland (CEUS-UNISONO project grant no. 2020/02/Y/ST5/00021).</p>
[Data set] Alloy [FA,Cs]PbI3 Perovskite Surfaces, Stability and Tolerance to Defect Formation
<p>This is the data repository related to the simulations of alloy [FA,Cs]PbI<sub>3</sub> Perovskite Surfaces.</p> <p>The surfaces here (Slabs.tgz) included are the relaxed structure of the slab models obtained by making cuts in the (001) direction in the special quasi-random structure (SQS) bulk models of FA<sub>1-x</sub>Cs<sub>x</sub>PbI<sub>3</sub> with (x=0.25 and 0.5), and the supercell models of pure FAPbI<sub>3</sub> and CsPbI<sub>3</sub> perovskites.[1] Besides, we include the optimized structures of each neutral vacancy pair defects (Slabs-defects.tgz) of formamidinium iodide and/or cesium iodide created in the most stable alloy [FA,Cs]I-C-FA<sub>0.75</sub>Cs<sub>0.25</sub>PbI<sub>3</sub> surface (see details in the paper). The ionic relaxations were performed with VASP code (version 6.2.1), using the PBE exchange-correlation functional, including Van der Waals corrections using the Grimme method with zero-damping function.</p> <p>Finally, the data set includes the simulated ab initio molecular dynamics (AIMD) trajectories of the most stable alloy and pure slabs, [FA,Cs]I-C-FA<sub>0.75</sub>Cs<sub>0.25</sub>PbI<sub>3</sub> and FAI-PbI<sub>3</sub>), including neutral vacancy pair defects of formamidinium iodide on a surface (Slabs-defects-AIMD.tgz). The AIMD calculations were performed with the CP2K code (V7.1), evaluating the forces with the PBE functional with the Grimme correction scheme (DFT- D3, Zero–damped correction). The trajectory productions include up to 15 ps using the microcanonical ensemble with 0.5 fs of time-step, considering 5 ps of thermalization time. More details in the article support information. </p> <p> </p> <p>Reference:</p> <p>1. G. M. Dalpian, X. G. Zhao, L. Kazmerski, A. Zunger, <em>Chem. Mater.</em> <strong>31</strong>, 2497–2506 (2019).</p>
A singlet oxygen non-radical pathway for Rhodamine B dye degradation: Study on its stability, mechanism of degradation, and detoxification
<p><span>This study examined the degradation pathway of used face mask-derived carbon (UFMC) as a catalyst to activate peroxymonosulfate (PMS) without light sources and metal for Rhodamine B (RhB) dye degradation.</span><span> </span><span>The structural changes in the UFMC catalyst resulting from RhB degradation reduced its oxygen functionality and so reduced the rate of RhB dye degradation with each usage. </span><span>The structural changes of UFMC catalysts were confirmed by Fourier transform infrared, Raman, and X-ray photoelectron spectroscopy. The oxygen functionalities were involved in the generation of reactive oxygen species (ROS), in terms of singlet oxygen (<sup>1</sup>O<sub>2</sub>), which are involved in the RhB dye degradation mechanism. This was confirmed using paramagnetic resonance (EPR) spectroscopy and scavenging analyses. </span><span>Re-useability and stability investigations revealed the UFMC catalyst reached a minimum degradation percentage (38.8%) in the 5<sup>th</sup> cycle, confirming the complete utilization of UFMC functional groups for RhB dye degradation. </span><span>Finally, the ability to detoxify the RhB dye water was assessed using zebrafish (<em>Danio rerio) </em>with different RhB dye concentrations (2 to 6 mg/L), and 0 to 72 h of incubation at 26 °C and the<em> </em>yeast<em> </em>cells<em> (Saccharomyces cerevisiaetests)</em> harvested about 10<sup>7</sup> cells per mL for 24 h under shaking at 160 rpm at 30 °C. </span><span>Based on these results, the animal models were exposed to the RhB dye water, the significant changes in their growth were evident. However, treated with the RhB degraded water as a control, no developmental deformity was observed. This research employed the </span><span>UFM</span><span> derived carbon conveniently supported with PMS for dye removal application.</span></p>
ScienceDex guides
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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.