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1,112 results for “canals”
Mãos que Vibram - Canal Mãos que Vibram: um olhar para a doença de Parkinson
<p>O <strong>Canal Mãos que Vibram</strong> é uma iniciativa voltada para fornecer informações atualizadas e relevantes sobre a doença de Parkinson. Criado em parceria com a UniAraguaia e a ASPARK-GO, este canal tem como objetivo conscientizar e educar sobre a doença, oferecendo conteúdo de qualidade de forma acessível.</p>
FIGURES 59–62 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 59–62. Platichthys krammeri sp. nov. compared to Nitzschia sp. SEM. 59. External/internal valve view, the two broken valves of a frustules displaying valve cavity with range of fibulae (above); raphe slit outside (below) running parallel to the marginal crest; note transapical waves and the external central raphe endings—central nodule (arrow). 60. Internal view of areolae structure and fibulae. 61, 62. Nitzschia sp. from section Lineares for comparison, specimens associated in the same preparation. Main distinguishing feature vs. Platichthys gen. nov. is differentiation between valve faces and mantles with a consequently more or less rectangular cross-section.
FIGURES 54–58 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 54–58. Platichthys krammeri sp. nov. SEM. 54. Broken valve showing external and internal valve views, specimen with strongly lacerated surface, with copulae of both valves lying between ruptured, collapsed valves. 55. External view of two frustules after cell division. 56–58. External view from keel-shaped edge towards ventral valve margin and copulae. 56. Note course of the raphe. 57. Note raphe below and parallel to ridge of the keel. 58. Close up of an intact valve with copulae.
FIGURES 1–21 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 1–21. Platichthys darwiniana sp. nov. 1–18. LM. Diminution size series of P. darwiniana sp. nov. frustules and valves, all in valve view taken from the holotype slide. 6. Holotype specimen. 19–21. SEM. 19–20. External view of the complete frustules, note the valvocopula perforated with multiple rows of fine puncta (arrow in Fig. 19). 21. External view of the valve with slight constriction in the middle showing the striae composed of very fine areolae (arrow) and particularly well developed hyaline valve mantle.
FIGURES 22–26 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 22–26. Platichthys darwiniana sp. nov. 22–24 SEM. 25, 26. TEM. 22. Valve view from the keel side of the specimen illustrated in Fig. 21 (strongly tilted). Note the position of the raphe bearing keel and the central nodule (arrow). 23. Specimen showing the compression of the valve and the raphe branches with distinct central nodule (arrow). 24. General view of the valve positioned on the raphe bearing canal. 25, 26. Valve of a specimen showing a position of the fibulae below the raphe bearing canal (arrowheads) and the transapical striae composed of oblong areolae (white arrow). Note the presence of narrow hyaline valve mantle (black arrow in Fig. 26) and of the hyaline raphe bearing canal (white arrow in Fig. 26). Fig. 26 is a close up of a specimen illustrated in Fig. 25.
FIGURES 39–53 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 39–53. Platichthys krammeri sp. nov. 39–49. LM. Valve view, frustules in various position with different focus. Note in particular diffuse prolongation of fibulae into the valve transapically. 50–53. SEM. 50. External valve view. 51, 52. External view of valve end. Holotype specimen in straight and marginal view. Note copulae of epitheca and shallow valves lacking distinction between faces and mantles. 53. External valve view of specimen with slightly lacerated surface.
FIGURES 27–32 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 27–32. Platichthys darwiniana sp. nov. SEM. 27. Valve apex showing strongly bent raphe apical ending (arrow). 28. View of an apical valve part with small groove formed by the strongly bent raphe end (arrowhead) which is not visible. 29. Apical part of the frustule showing strongly bent raphe end (arrowhead). 30–32. Internal view of a broken valve. 30. Internal view showing the compression of the valve (marked by the small arrowheads) and narrow hyaline mantle (arrow). 31, 32. Close up of the broken valve, note the striae forming areolae positioned in shallow grooves (arrowhead in Fig. 32).
FIGURES 33–38 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae
FIGURES 33–38. SEM. Platichthys darwiniana sp. nov. 33, 34. Internal valve view of the same specimen at different tilting degree, note the position of fibulae (black arrow) and the internal central raphe endings (white arrow). 35. Broken valve showing the position of the fibulae (arrow), note the transapical striae merging into the particular fibulae. 36. Close up of the specimen illustrated in Fig. 34 with an internal view of the central valve part, note the distant position of the two central fibulae (arrowheads) and the central nodule (arrow). 37. Central part of the valve interior with close up of the central nodule with double helictoglossa (arrowhead) and the presence of portulae (white arrow). 38. Apical part of the valve interior, note the presence of simple helictoglossa (arrowhead) and the portulae (white arrow).
FIGURES 23–29 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 23–29. Nitzschia gaoi, sp. nov., LM. 23–25. Three valves showing a slightly eccentric raphe system. 24. Photograph of holotype. 26. One valve showing a centrally positioned raphe system. 27–29. Three valves showing a slightly eccentric raphe system. 27. Photograph of isotype specimen. Scale bar = 10 μm for all figures.
FIGURES 45–49 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 45–49. Nitzschia gaoi, sp. nov., girdle band views, SEM. 45. Internal view of a whole valve with one girdle band. 46–47. Apices, note that the girdle band is open at one apex (Fig. 46) but closed at the other (Fig. 47). 48. External view of the apex, note the girdle band (arrow). 49. Apex showing the areolae of the girdle band covered by hymenes and terminating near each apex (Figs 46, 49, arrows). Scale bars = 10 μm (Fig. 45), 1 μm (Figs 46–49).
FIGURES 17–22 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 17–22. Nitzschia arierae, sp. nov., canal-raphe-conopeum system, SEM. 17. External view of the apex, note that the conopea are fused into the valve (arrow). 18–19. External view of central area, note conopeal canal, raphe canal and supporting points. 20–22. Internal views, note keels and supporting marks. Abbreviations: c = conopeum, cc = conopeal canal, cv = zone of valve face subtended by conopeum, f = fibula, k = keel, r = raphe slit, rc = raphe canal, sm = supporting mark, v = uncovered zone of valve face. Scale bars = 1 μm (Figs 17–18, 20–22), 2 μm (Fig. 19).
FIGURES 12–16 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 12–16. Nitzschia arierae, sp. nov., internal views, SEM. 12. A whole valve, note the interspaces narrower towards the poles. 13. Apex, note the distinctive apical pore field and the poroids in the keel zone (two arrows). 14–16. Central areas, showing the subtended zone different from the uncovered zone (Fig. 14, double-head arrows), shortened striae (arrows), dichotomous striae (wavy arrows), and poroids present in the keel zone (Figs 14–15, arrowheads). Scale bars = 10 μm (Fig. 12), 1 μm (Figs 13–16).
FIGURES 8–11 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 8–11. Nitzschia arierae, sp. nov., external views, SEM. 8. A whole valve, note the constant width of conopeum. 9. Apex, showing the apical pore field (wavy arrows), the hooked terminal fissure towards the dorsal side (arrowhead), and the supporting points (arrows). 10. Central area, note the supporting points (arrows). 11. Another apex, note the hooked terminal fissure towards the dorsal side (arrowhead) and the supporting points (arrows). Scale bars = 10 μm (Fig. 8), 1 μm (Figs 9–11).
FIGURES 1–7 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 1–7. Nitzschia arierae, sp. nov., LM. 1–7. Seven valves showing size reduction. 1. Photograph of isotype specimen, note the two rows of dark spots (six arrows) and the two parallel lines on either side of the raphe. 3. Photograph of holotype, note the centrally positioned raphe system. Scale bar = 10 μm for all figures.
FIGURES 30–39 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 30–39. Nitzschia gaoi, sp. nov., external views, SEM. 30–31. Two complete valves, note the nitzschioid symmetry of the raphe system. 32–33. Apices, note the constant width of the conopeum. 34–35. Apices showing the apical pore fields and the hooked terminal fissures towards the dorsal side. 36. Intact central area, showing costae, conopea, and the fusing of costae with conopeal spines (arrowheads). 37. Eroded area showing small conopea occuring on each side of each costa, and a transverse row of areolae appearing in a girdle band. 38. Eroded area showing striae and areolae. 39. Broken central area, showing the canal-raphe-conopeum system (cc = conopeal canal). Scale bars = 10 μm (Figs 30–31), 1 μm (Figs 32–39).
FIGURES 40–44 in Two new Nitzschia species (Bacillariophyceae) from China, possessing a canal-raphe-conopeum system
FIGURES 40–44. Nitzschia gaoi, sp. nov., internal views, SEM. 40. A whole valve, note the upper apex very slightly arched toward the ventral side. 41–42. Apices, note one apex bending toward the ventral side (Fig. 41, two arrows) and the other almost straight (Fig. 42, two arrows). 43. Central area, note that the zone of valve face subtended by the conopeum (cv) has no areolae in most part but these are present near or on the wall of raphe canal (arrow). 44. Detail of the apex, note the distinctive apical pore field (arrow). Scale bars = 10 μm (Fig. 40), 1 μm (Figs 41–44).
FIGURES 24–29 in Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)
FIGURES 24–29. Encyonema bonapartei SEM views (type material from Sampigny). 24. Valve in external view. 25. Valve in internal view. 26. Close up on proximal raphe endings in external view. 27. Close-up of proximal raphe endings in internal view. 28. Close-up of apex in external view. 29. Close-up of apex in internal view showing distal raphe fissure ending in helictoglossae. Scale bars = 2 μm.
FIGURE 1 in Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)
FIGURE 1. Sampling sites (black triangle) in Great East region (France) where Encyonema bonapartei has been recorded, with the location of type locality (black star).
Cambio estacional de la hora en el Canal 24h de RTVE
<p>Entrevista en directo en el Canal 24h de RTVE con ocasión del cambio estacional de la hora de otoño del 2024.</p>
Associations among cotyledon developmental stability, canalization and phenotypic plasticity in response to shading and burial depth in five herbaceous species at early seedling stage
<p class="MsoNormal"><strong><span>Premise of research. </span></strong></p> <p class="MsoNormal"><span>Cotyledons have important functions in early seedling stage and have important effects on later stages, but we know little about the relationships among developmental stability, canalization and phenotypic plasticity in cotyledons. </span></p> <p class="MsoNormal"><strong><span>Methodology. </span></strong></p> <p class="MsoNormal"><span>We conducted </span><span><span>a field</span></span><span> experiment with five herbaceous species, by subjecting them to contrasting light conditions and burial depths and measuring their cotyledon size and fluctuating asymmetry (random deviation from perfect bilateral symmetry, indicating developmental stability or instability), coefficient of variation and plasticity of cotyledon size,</span><span> </span><span>to investigate the relationships among</span><span> </span><span>cotyledon developmental stability, canalization and plasticity in response to shading and deep burial. </span></p> <p class="MsoNormal"><strong><span>Pivotal </span><span><span>r</span></span><span>esults. </span></strong></p> <p class="MsoNormal"><em><span>Pharbitis purpurea</span></em><span>, </span><em><span>Convolvulus arvensis</span></em><span> and </span><em><span>Carpesium</span></em><span> </span><em><span>abrotanoides</span></em><span> had increased cotyledon size in response to shading at both burial depths;</span><em><span> Abutilon theophrasti</span></em><span> showed reduced cotyledon size in response to shading vs. full light at shallow depth, but greater cotyledon size </span><span>in response to </span><span>both shading and deep burial. </span><span>Shading increased cotyledon fluctuating asymmetry of</span><em><span> </span></em><em><span>P</span></em><em><span><span>.</span></span></em><em><span> purpurea</span></em><span> and </span><em><span>C</span></em><em><span><span>.</span></span></em><span> </span><em><span>abrotanoides</span></em><span>, while deep burial decreased it. Cotyledon fluctuating asymmetry had positive correlations with coefficient of variation and plasticity in response to shade in shading, with little correlation between coefficient of variation and plasticity. </span></p> <p class="MsoNormal"><strong><span><span>C</span></span><span>onclusions. </span></strong></p> <p class="MsoNormal"><span>Results suggested</span><span> </span><em><span>A</span></em><em><span><span>.</span></span></em><em><span> theophrasti</span></em><span> </span><span>may have greater tolerance for multiple stresses than the other species,</span><span> and deep burial may improve shade tolerance of cotyledons through moderate level of stress selection</span><span>. Both developmental instability</span><span> and decreased canalization may indicate </span><span><span>the</span></span><span> state of faster growth. </span><span>Developmental instability</span><span> can facilitate more-active response to shading in cotyledon, while the relationship between canalization and plasticity should be more complex. </span></p>
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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.