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126 results for “spicule”
FIGURE 14 in An elusive giant: A new species of Vitreorana Guayasamin et al., 2009 (Anura: Centrolenidae) from the northern Atlantic Forest with an osteological description and comments on integumentary spicules
FIGURE 14. Location of the Parque Nacional da Serra das Lontras (white star) and distribution of other Vitreorana species (V. baliomma—yellow triangle, V. eurygnatha—orange cross, V. franciscana—green square, and V. uranoscopa—blue diamond) in northern portion of Atlantic Forest (upper left); collection site of Vitreorana assuh sp. nov. inside the PNSL (upper right); environments of the stream where V. assuh was found (lower photos). Brazilian states included are: Alagoas (AL), Bahia (BA), Minas Gerais (MG), Espírito Santo (ES) and Sergipe (SE). Photos by V.M. Zucchetti.
FIGURE 1 in New records of Neopetrosia carbonaria (Lamarck, 1814) from the Brazilian coast reveal new morphological features and spicule types
FIGURE 1. Collection sites of Neopetrosia carbonaria in the Northeastern Brazilian coast (CE—Ceará State; RN—Rio Grande do Norte State; PB—Paraíba State; PE—Pernambuco State; AL—Alagoas State and BA—Bahia State).
FIGURE 3 in New records of Neopetrosia carbonaria (Lamarck, 1814) from the Brazilian coast reveal new morphological features and spicule types
FIGURE 3. Anatomical characters of Neopetrosia carbonaria. (A–B) Tangential view of the ectosomal skeleton, (C) Cross section of the skeleton, showing the subdermal layer and the inner choanosome. Scale bars: (A–B) 500 μm, (C) 1 mm.
FIGURE 2 in New records of Neopetrosia carbonaria (Lamarck, 1814) from the Brazilian coast reveal new morphological features and spicule types
FIGURE 2. Underwater photographs of Neopetrosia carbonaria specimens. (A) UFPEPOR 1853, (B) UFPEPOR 1854, (C) UFPEPOR 1637, (D) MNRJ 17035, (E) MNRJ 17783, (F) UFPEPOR 1855, (G) MNRJ 17766, (H) MNRJ 17782.
Data for: Alfvén Pulse-Driven Spicule-like jets in the presence of thermal conduction and ion-neutral collision in a two-fluid regime
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Influence of a magnetic narrow region on the propagation of Type II spicules into the solar corona
<p>In this paper, we study the possible influence of a magnetic narrow region on the propagation of jets with some characteristics of Type II spicules into the solar corona using two approximations: thermo-mechanical (TM) and magnetohydrodynamic (MHD). We motivate the idea of this paper by considering that some advanced 2.5D numerical simulations of radiation MHD of the formation of Type II spicules show the narrowing of the magnetic field lines in the loops where the spicules propagate. In particular, we propose that the magnetic narrow region be described in terms of a magnetic bottle configuration. In the TM approximation, we have found that the magnetic bottle produces that the 9% of the plasma embedded manages to escape the magnetic confinement, in contrast, the remaining 91% returns to the bottom of configuration colliding to the raising plasma and generating a heating process. The heating process could represent a source that maintains the current temperature of the corona. On the other hand, in the MHD approximation, through numerical simulations, we found that it occurs an increase of temperature mainly at the top of the jet, which supports the idea of sectioning the spicule in the TM approximation. Also, in the MHD approximation, we show that the magnetic bottle does not directly affect the propagation of the jet; since the physical conditions of the ideal MHD equations imply that the magnetic field lines are frozen-in with the plasma, and no confinement effect is possible.</p>
FIGURE 1 in Two new species of Chondrocladia (Demospongiae: Cladorhizidae) with a new spicule type from the deep south Pacific, and a discussion of the genus Meliiderma
FIGURE 1. Maps showing the collecting areas.
Fig. 5 Spicule patterns using microcomputed tomography. a in Revealing morphological characteristics of Goniodorididae genera (Mollusca: Nudibranchia)
Fig. 5 Spicule patterns using microcomputed tomography. a Lateral view of Goniodoris nodosa (Montagu, 1808) (MNCN 15.05/92160). b Detail of anterior dorsal spicules of G. nodosa (MNCN 15.05/92160). c Ventral view of G. nodosa (MNCN 15.05/92160). d Lateral view of Goniodoridella savignyi Pruvot-Fol, 1933 (QMMO 85,916). e Dorsal view of G. savignyi (QMMO 85,916). f Ventral view of G. savignyi (QMMO 85,916). Scale bars: a–c 250 µm. d–f 100 µm
Figure 14. Psilocalyx wilsoni, spicules. A, uncinate. B, scopule. C in Systematics and spicule evolution in dictyonal sponges (Hexactinellida: Sceptrulophora) with description of two new species
Figure 14. Psilocalyx wilsoni, spicules. A, uncinate. B, scopule. C, lophodiscohexaster.
FIGURE 17 in Late Eocene siliceous sponge fauna of southern Australia: reconstruction based on loose spicules record
FIGURE 17. Sanidasters of Recent Sceptrintus richardi (redrawn from Topsent 1904).
FIGURE 11 in Late Eocene siliceous sponge fauna of southern Australia: reconstruction based on loose spicules record
FIGURE 11. Verticillate acanthostrongyle of Dotona pulchella (redrawn from Calcinai et al. 2001).
FIGURE 3 in Late Eocene siliceous sponge fauna of southern Australia: reconstruction based on loose spicules record
FIGURE 3. Acanthoxea of recent Agelas axifera (redrawn from Hentschel 1911).
Influence of a magnetic narrow region on the propagation of Type II spicules into the solar corona
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FIGURE 3. Cladorhiza bathycrinoides spicules, SEM. A. Style 1b in Report of Cladorhiza bathycrinoides Koltun (Demospongiae) from North America and a new species of Farrea (Hexactinellida) among sponges from Cordell Bank, California
FIGURE 3. Cladorhiza bathycrinoides spicules, SEM. A. Style 1b, one complete and magnified ends from the stalk axis. B. Style 2, two complete and magnified ends from the tentacle axis. C. Style 4, one complete and magnified ends from the tentacle subdermis. All styles are at the same scale as in A. D. Four views of anchorate anisochelae from tentacle cover. E. Two sigmas from the stalk cover. at the same scale as D.
orientation of emu femur shows dense CB, distinct ELB, and a thin layer of MB. (I) Ostrich MB appears more laminar than in (C) or (F) because of the longitudinal orientation of tubelike medullary spicules. in Gender-Specific Reproductive Tissue in Ratites and Tyrannosaurus rex
orientation of emu femur shows dense CB, distinct ELB, and a thin layer of MB. (I) Ostrich MB appears more laminar than in (C) or (F) because of the longitudinal orientation of tubelike medullary spicules.
Figure 8 in Recycling resources: silica of diatom frustules as a source for spicule building in Antarctic siliceous demosponges
Figure 8. Schematic summary of our hypothesized recycling route for the reutilization of diatom silica by sponge amoebocytes compared to the standard silicon uptake and production of siliceous spicules by the sclerocytes of demosponges.
Figure 3 in Recycling resources: silica of diatom frustules as a source for spicule building in Antarctic siliceous demosponges
Figure 3. Signs of silica dissolution in diatom frustules and valves. A–B, diatoms in the tissue of M. tridens. C, Podosira sp. valve in P. areolatus. D, Navicula sp. valve within He. pilosus. Arrows: evidence of silica dissolution or degradation in diatoms.
Figure 2. Diatoms within sponge tissues. A in Recycling resources: silica of diatom frustules as a source for spicule building in Antarctic siliceous demosponges
Figure 2. Diatoms within sponge tissues. A, diatom in the mesohyl of P. areolatus. B, diatom in the mesohyl of I. kerguelenensis. C, diatom in the mesohyl of Ha. penicillata. D, diatom in the mesohyl of K. variolosa. Abbreviations: b, bacteria; co, collagen; di, diatom; spc, sponge cell.
Figure 1 in Recycling resources: silica of diatom frustules as a source for spicule building in Antarctic siliceous demosponges
Figure 1. Free-living diatoms of Deception Island. A, external frustule of Porosira sp. B, external valve view of Fragilariopsis sp. C, internal view of Porosira sp. valve. D, external valve of Navicula sp. E, two frustules of Chaetoceros sp. Note the fused setae linking the cells. F, external view of Fragilariopsis sp.
Figure 5 in Systematics and spicule evolution in dictyonal sponges (Hexactinellida: Sceptrulophora) with description of two new species
Figure 5. Sarostegia oculata, spicules: A, uncinate. B, sarule. C, choanosomal hexactin. D, dermal hexactin. E, hemioxyhexaster. F, discohexaster.
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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.