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2,555 results for “Lead”
Figure 2 in A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals
Figure 2. Leaves of lettuce under lead and silver nitrate concentrations. A: 0 mg.Kg-1 Pb and Ag; B: 12,5 mg.Kg-1 Ag; C: 25 mg.Kg-1 Ag; D: 37 mg.Kg-1 Ag; E: 90 mg.Kg-1 Pb; F: 180 mg.Kg-1 Pb and G: 270 mg.Kg-1 Pb. Ade: adaxial epidermis;Chp:Chlorophyll parenchyma; Tr:trichome; X: xylem; Abe: abaxial epidermins P: phoema Hy: Hypodermis; VB:vascular bundles; AB: Assesory bundles Bars 50µm.
Figure 1 in A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals
Figure 1. Germination and growth characteristics of lettuce plants subjected to increasing lead and Ag concentrations. A) Emergence speed index and emergence mean time; B) Emergence percentage; C) Plant height as a function of lead and silver concentrations; D) Behavior of leaf area in plants subjected to lead; E) SPAD as a function of lead and silver concentrations; F) Weight of dry matter. Each point on the graphs represents an average of 50 repetitions. The standards variations vary between ±2.5 and ±6.8 around the average from the graphs at the different points.
Figure 3 in A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals
Figure 3. Roots of lettuce under lead and silver nitrate concentrations. A: 0 mg.Kg-1 Pb and Ag; B: 12,5 mg.Kg-1 Ag; C: 25 mg.Kg-1 Ag; D: 37 mg.Kg-1 Ag; E: 90 mg.Kg-1 Pb; F: 180 mg.Kg-1 Pb and G: 270 mg.Kg-1 Pb. En: endoderm; Ep: epidermis; Ex: exoderm; Co: cortex; Px: protoxylem; Mx: metaxylem. Bars: 50µm.
Urban Growth Strategy in Greater Sydney Leads to Unintended Social and Environmental Challenges
<p>A dataset of the manuscript "Urban Growth Strategy in Greater Sydney Leads to Unintended Social and Environmental Challenges", paper published in Nature Cities. The NVivo files contain all variables and causal relationships among the variables supported by quotations coded from the 1968, 2005 and 2018 urban planning reports in Greater Sydney. (1) <em>Sydney region: outline plan, 1970-2000 A.D – a strategy for development</em><em> </em>published by the NSW State Planning Authority<em>; </em>(2)<em> City of Cities. A plan for Sydney's Future</em> published by the NSW Department of Planning<em>; and </em>(3)<em> A Metropolis of Three Cities – connecting people</em> published by Greater Sydney Commission.</p>
Shift in Circulating Human Adenovirus Species Leading to Nationwide Outbreak - China, January 2023-August 2024
<p><span>Detailed methodologies and data quality control standards are provided</span><span> in the supplementary materials</span></p>
Synergistic homovalent and heterovalent substitution effects on piezoelectric and relaxor behavior in lead-free BaTiO3 ceramics
<p>This study investigates lead-free BaTiO3 (BT) perovskite ceramics, unraveling the synergistic effects arising from simultaneous homovalent (Zr) and heterovalent (Nb) substitution. Focusing on piezoelectric, ferroelectric, and relaxor behaviors, this research employs a comprehensive suite of analyses, including temperature-dependent<br>dielectric measurements, polarization-electric field hysteresis loops, and bipolar strain measurements. Significantly, our study unveils that the simultaneous substitution of Zr and Nb in the BT lattice induces roomtemperature relaxor behavior at relatively low concentrations (5 % Zr and 3 % Nb), yielding higher permittivity and larger maximum polarization compared to single element (Zr or Nb) substituted BT relaxors. Bipolar strain measurements showcase substantial large-signal d33* values (~250 pm/V) across a broad temperature range (–50 ◦C to 30 ◦C) for BT ceramics with simultaneous 5 % Zr and 2 % Nb substitution. This research advances understanding of homovalent and heterovalent substitution in BT ceramics and opens avenues for tailoring properties to suit specific applications. </p>
Effect of Organic Cation Size on Structural, Thermochromic, Dielectric and Photoluminescence Properties of Two-Dimensional Lead Iodide Perovskites with Extremally Reduced Dielectric Confinement
<p>Dataset for scientific publication entitled Effect of Organic Cation Size on Structural, Thermochromic, Dielectric and Photoluminescence Properties of Two-Dimensional Lead Iodide Perovskites with Extremally Reduced Dielectric Confinement. </p> <p>This research was supported by the National Science Center (Narodowe Centrum Nauki) in Poland under project No. 2020/38/A/ST3/00214. JKZ acknowledges support from Academia Iuvenum, Wroclaw University of Science and Technology.</p>
Linked collectors and determiners for: A new Calliprora species mining lead trees in Florida (Lepidoptera: Gelechiidae).
Natural history specimen data linked to collectors and determiners held within, "A new Calliprora species mining lead trees in Florida (Lepidoptera: Gelechiidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/a0a76453-f5d6-4758-8545-7ce2a6e0b092">https://bionomia.net/dataset/a0a76453-f5d6-4758-8545-7ce2a6e0b092</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/a0a76453-f5d6-4758-8545-7ce2a6e0b092">https://gbif.org/dataset/a0a76453-f5d6-4758-8545-7ce2a6e0b092</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Revisiting the type of Cespitularia stolonifera Gohar, 1938 leads to the description of a new genus and a species of the family Xeniidae (Octocorallia, Alcyonacea).
Natural history specimen data linked to collectors and determiners held within, "Revisiting the type of Cespitularia stolonifera Gohar, 1938 leads to the description of a new genus and a species of the family Xeniidae (Octocorallia, Alcyonacea)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/6d7b4e8c-9086-45b7-87f2-eee086af0c5a">https://bionomia.net/dataset/6d7b4e8c-9086-45b7-87f2-eee086af0c5a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/6d7b4e8c-9086-45b7-87f2-eee086af0c5a">https://gbif.org/dataset/6d7b4e8c-9086-45b7-87f2-eee086af0c5a</a>. Formatted as a Frictionless Data package.
Supplementary data for study on "Superplastic 3D printed nitinol woven metamaterials lead to dramatic variations of mechanical properties by design"
<p>Raw and processed data from experimental compression testing of 3D printed nitinol lattices and wovens are provided as supplementary materials for the mentioned study, submitted for evaluation to the journal of Virtual and Physical Prototyping.</p>
Data from: A threat to loyalty: Fear of missing out (FOMO) leads to reluctance to repeat current experiences
<p>We investigate a popular but underresearched concept, the fear of missing out (FOMO), on desirable experiences of which an individual is aware, but in which they do not partake. Through laboratory and field studies, we establish FOMO's pervasiveness as a psychological phenomenon, present real-life contexts wherein FOMO may be experienced, and explore its behavioral consequences. Specifically, we show that FOMO poses a threat to loyalty by decreasing one's intentions to repeat a current experience and may decrease the valuation of the current experience.</p>
Oriental Honey-Buzzards Dataset | Climate change leads to range contraction for the Oriental Honey-Buzzards: How to point out the future conservation strategies?
<p>This dataset contains raster data (.TIF) in probability and binary outputs of oriental honey-buzzards distribution within the wintering and breeding areas under changing climate.</p> <p><strong>File Size</strong>: ~184 MB (13.8 MB in compressed ZIP file)</p> <p><strong>Format File</strong>:</p> <p><em>ohb_A_B_C</em>.tif (.tfw; .XML; .dbf)</p> <p><strong>A</strong>: breeding or wintering</p> <p><strong>B</strong>: timepoint and scenario. e.g., 2050ssp5 or 2010ssp2</p> <p><strong>C</strong>: binary or probability outputs. e.g., bin or prob. <em>Note: for binary maps, value 0: non-suitable areas for OHB and value 1: suitable areas for OHB</em></p> <p>For further inquiries. Please contact: aryo_acondro@apps.ipb.ac.id</p>
Molecular signatures of resource competition: Clonal interference favors ecological diversification and can lead to incipient speciation
<p>Microbial ecosystems harbor an astonishing diversity that can persist for long times. To understand how such diversity is structured and maintained, ecological and evolutionary processes need to be integrated at similar timescales. Here, we study a model of resource competition that allows for evolution via de novo mutation, and focus on rapidly adapting asexual populations with large mutational inputs, as typical of many bacteria species. We characterize the adaptation and diversification of an initially maladapted population and show how the eco-evolutionary dynamics are shaped by the interaction between simultaneously emerging lineages – clonal interference. We find that in large populations, more intense clonal interference can foster diversification under sympatry, increasing the probability that phenotypically and genetically distinct clusters coexist. In smaller populations, the accumulation of deleterious and compensatory mutations can push further the diversification process and kick-start speciation. Our findings have implications beyond microbial populations, providing novel insights about the interplay between ecology and evolution in clonal populations.</p>
Fig. 4. Oral papillae sensu lato. A in Interactive identification key to all brittle star families (Echinodermata; Ophiuroidea) leads to revised morphological descriptions
Fig. 4. Oral papillae sensu lato. A. Ventral side of a schematic brittle star. B. One angle of the oral frame includes a dental plate (DP), two oral plates (= half-jaws) (OP), two adoral shields (AdSh), and one oral shield (OSh), positioned from proximal towards distal. The typical position of teeth, tooth papillae, secondary infradental papillae (2IPa), infradental papillae (IPa), buccal scale, secondary adoral shield spine (2AdShSp), adoral shield spine (AdShSp) on DP, OP and AdSh are illustrated, respectively. The presence / absence, number and shape of each papilla vary among different taxa.
Fig. 6 in Interactive identification key to all brittle star families (Echinodermata; Ophiuroidea) leads to revised morphological descriptions
Fig. 6. DELTA interactive key workspace. The software window shows: available characters (blue box), used characters (grey), remaining taxa (green) and eliminated taxa (red).
Fig. 2 in Interactive identification key to all brittle star families (Echinodermata; Ophiuroidea) leads to revised morphological descriptions
Fig. 2. SEM images of various brittle star ossicles. A–E. Disc structures. A. Dorsal disc, radial shield with tubercles (Ophiomusa lymani (Wyville-Thomson, 1873)). B. Dorsal disc (Ophiolimna bairdi (Lyman, 1883)). C. Ventral disc (Ophionereis porrecta Lyman, 1860), the interradius is assumed as a triangle and H gives its height. D. Dorsal disc, triangular radial shield (Ophiactis savignyi (Müller & Troschel, 1842)). E. Ventral disc, mouth (Ophioderma sp.). – F–H. Atypical arm spines. F. Umbrella-shaped arm spine (Ophiotholia spathifer (Lyman, 1879)). G. Hook-shaped arm spine (Asteronyx loveni Müller & Troschel, 1842). H. Bristle spines (Ophiernus vallincola Lyman, 1878). – I–L. Lateral arm plates (LAP). I. LAP with constriction (Ophioscolex glacialis Müller & Troschel, 1842). J. Dorsal and ventral part of LAP without constriction (Ophiura ophiura (Linneaus, 1758)). K. Ventral part of LAP projecting ventro-proximalwards (Ophiopallas paradoxa Koehler, 1904). L. Ventral part of LAP not projecting ventro-proximalwards (Ophiosphalma fimbriatum (Koehler, 1922)).
Fig. 5. Typical arm spine shape. A in Interactive identification key to all brittle star families (Echinodermata; Ophiuroidea) leads to revised morphological descriptions
Fig. 5. Typical arm spine shape. A. Tapering (conical): distally ⅓ as thick as proximal diameter with a round cross-section; Pointed: distally half as thick as proximal diameter with a round cross-section; Cylindrical: same thickness at both ends with flat/round tip. B. Flat: distally half as thick as proximal diameter with oval cross-section. Red dashed lines show the ⅓ distal cross-section. The letters ʻaʼ and ʻbʼ illustrate the diameter of ⅓ distal and basal cross-sections, respectively. ʻa/bʼ shows the approximate ratio of these diameters.
Fig. 3 in Interactive identification key to all brittle star families (Echinodermata; Ophiuroidea) leads to revised morphological descriptions
Fig. 3. SEM images of various ossicle structures in brittle stars. A. Muscle and nerve opening on LAP separated by small ridge if at all (Amphiura chiajei Forbes, 1843). B. Muscle and nerve opening on LAP separated by large, prominent ridge or regular stereom (Ophiolycus purpureus (Düben & Koren, 1846)). C. Non-keeled vertebra (Amphiura chiajei). D. Keeled vertebra (Ophiothrix fragilis Abildgaard, 1789). E. Vertebra with oral bridge (Euryale aspera Lamarck, 1816). F. Sockets indicate teeth and tooth papillae on dental plate as single row (Amphilepis norvegica (Ljungman, 1865)). G. ½ single row of teeth and ½ tooth papillae (Ophiothrix fragilis). H. ⅔ single row of teeth and ⅓ tooth papillae (Ophiocamax vitrea Lyman, 1878). I. Sockets on dental plate covering evenly (Asteronyx loveni Müller & Troschel, 1842). J–K. LAP not arched = position lateral. L. LAP arched = wrapped around the arm.
Low molecular weight seaweed–derived polysaccharides lead to increased faecal bulk but do not alter human gut health markers
<p>Differential analysis of taxa before and after the consumption of either agar, alginate or maltodextrin showed no significant change at phylum or family level (<strong>Supplementary tables 1-2</strong>). </p> <p><em>Supplementary Table 1: Differential abundance analysis with ALDEX2 on family level</em></p> <p><em>Supplementary Table 2: Differential abundance analysis with ALDEX2 on phylum level</em></p>
Rapid evolution of a brood parasite's egg pattern does not lead to large increases in mimetic fidelity
<p>In coevolutionary mimicry systems, mimics evolve to resemble models. When model fitness is reduced by close mimicry (such as when models are hosts and mimics are brood parasites), selection should drive mimics to evolve greater similarity to models over time, and models to evolve away from mimics ('chase-away evolution'), potentially resulting in mimetic fidelity remaining constant over time. Evidence for reciprocal evolution of models and mimics and its effect on mimetic fidelity is limited, however, likely because long-term data are required to observe such trends. Here, we test for these dynamics in an avian brood parasite system. The brood-parasitic cuckoo finch (Anomalospiza imberbis) lays eggs which mimic those of its host, the tawny-flanked prinia (Prinia subflava). In defence, prinias have evolved complex egg patterns which facilitate recognition of parasitic eggs. Prinia egg patterns are more complex than cuckoo finch egg patterns, and so selection should favour elevated complexity in parasite eggs (i.e. mimics evolving towards models) and even greater complexity in host eggs (i.e. models evolving away from mimics). Using a dataset spanning 50 years, we show that egg pattern complexity has indeed increased in both species over this time period, reflecting rapid adaptive evolution of both models and mimics. Both species have evolved at similar rates. Accordingly, we find no detectible increase in mimetic fidelity over time. Thus, host evolution can counteract even rapid parasite evolution, and result in the persistence of imperfect mimicry.</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.