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1,663 results for “shells”
Fig. 5 in Phylogenetic reconstruction based on COI reshuffles the taxonomy of hyalosphenid shelled (testate) amoebae and reveals the convoluted evolution of shell plate shapes
Fig. 5. Light (a) and scanning electron (b) micrographs of Quadrulella quadrigera from Australia. Image (a) has been stacked with Combine ZP. Scale bars = 40 µm.
Fig. 2 in Phylogenetic reconstruction based on COI reshuffles the taxonomy of hyalosphenid shelled (testate) amoebae and reveals the convoluted evolution of shell plate shapes
Fig. 2. Light micrographs of barcoded Quadrulella variabilis sp. nov. cells: (a) cell Q-54; (b) cell Q-48; (c) cell Q-52; (d) cell Q-101; (e) cell Q-98; (f) cell Q-53. Scale bars = 10 µm.
Fig. 9 in Phylogenetic reconstruction based on COI reshuffles the taxonomy of hyalosphenid shelled (testate) amoebae and reveals the convoluted evolution of shell plate shapes
Fig. 9. Maximum likelihood bootstrap consensus tree of 34 Quadrulella COI sequences and 71 other hyalosphenid sequences based on a 684- nucleotide position alignment. The numbers along the branches represent respectively the bootstrap values obtained by maximum-likelihood analysis, posterior probability values obtain by Bayesian analysis and parsimony scores obtain by maximum parsimony analysis. Only values above 50/0.50/50 are shown. The tree is rooted with the Padaungiella–Alocodera group. The scale bar corresponds to the mean number of nucleotide substitutions per site on the respective branch.
Fig. 8 in Phylogenetic reconstruction based on COI reshuffles the taxonomy of hyalosphenid shelled (testate) amoebae and reveals the convoluted evolution of shell plate shapes
Fig. 8. Scanning electron micrographs illustrating morphological variations within the Quadrulella cf. symmetrica morphospecies. (a) Q. cf. symmetrica_BG from Bulgaria; (b) Q. cf. symmetrica_CA from Canada; (c) Q. cf. symmetrica_CH from Switzerland; (d) Q. variabilis with a long neck (ex: Q. longicollis) from Bulgaria. Scale bars = 20 µm. Image from Kosakyan et al. (2012) with permission from the editor.
PLATE 140. Splendrillia spp. shell surface SEM images, part 1. Figs. 1–2 in Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species
PLATE 140. Splendrillia spp. shell surface SEM images, part 1. Figs. 1–2: Splendrillia interpunctata (E.A. Smith, 1882), Tourmaline Reef, Mayaguez, Puerto Rico (M. Williams coll.), SEM magnifications of 250x & 1,000x, respectively. Figs. 3–4: Splendrillia coccinata (Reeve, 1845), designated neotype, Chatham Bay, Union I., SVG (USNM 1291358), SEM magnifications of 250x & 1,000x, respectively. Figs. 5–6: Splendrillia masinoi, new species, paratype, WNW off Santa Martha Beach, Curaçao, Netherlands Antilles (USNM 1291363), SEM magnifications of 250x & 1,000x, respectively. All SEM images courtesy the ANSP and Paul Callomon.
PLATE 141. Splendrillia spp. shell surface SEM images, part 2. Figs. 1–2 in Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species
PLATE 141. Splendrillia spp. shell surface SEM images, part 2. Figs. 1–2: Splendrillia karukeraensis, new species, paratype, 1.6 km NW of Pointe des Chateaux, Grande-Terre, Guadeloupe (ANSP 465005), SEM magnifications of 250x & 1,000x, respectively. Figs. 3–4: Splendrillia karukeraensis, new species, holotype, 1.6 km NW of Pointe des Chateaux, Grande-Terre, Guadeloupe (ANSP 313863), SEM magnifications of 250x & 1,000x, respectively. Figs. 5–6: Splendrillia compta, new species, Holotype, off N Natal, Rio Grande do Norte, Brazil (MZSP 122075), SEM magnifications of 250x & 1,000x, respectively. All SEM images courtesy the ANSP and Paul Callomon.
Pernambuco State, Brazil (MZSP 30975). Fig. 1: ventral, lateral & dorsal views; Fig. 2: apical view, V = varix, L = edge of outer lip. Figs. 3–4: paratype from the type lot (MZSP 122078). Fig. 3: ventral view; Fig. 4: apical view (varix not developed in this immature specimen). Figs. 5–6: shell surface SEM images of holotype (MZSP 30975). Fig. 5: image taken at 500x showing pattern of paired grooves separated by wider region; the thin line is parallel to the axis of shell. Fig. 6: a closer look showing pattern of punctae (1,000x). SEM images by Yolanda Villacampa and courtesy of the Smithsonian. in Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species
Pernambuco State, Brazil (MZSP 30975). Fig. 1: ventral, lateral & dorsal views; Fig. 2: apical view, V = varix, L = edge of outer lip. Figs. 3–4: paratype from the type lot (MZSP 122078). Fig. 3: ventral view; Fig. 4: apical view (varix not developed in this immature specimen). Figs. 5–6: shell surface SEM images of holotype (MZSP 30975). Fig. 5: image taken at 500x showing pattern of paired grooves separated by wider region; the thin line is parallel to the axis of shell. Fig. 6: a closer look showing pattern of punctae (1,000x). SEM images by Yolanda Villacampa and courtesy of the Smithsonian.
PLATE 51. Decoradrillia spp. shell surface SEM images. Figs. 1–2 in Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species
PLATE 51. Decoradrillia spp. shell surface SEM images. Figs. 1–2: Decoradrillia pulchella (Reeve, 1845), Anse Bateau Bay, Tobago I., Trinidad & Tobago (ANSP 338495), 240x & 930x, respectively. Figs. 3–4: Decoradrillia harlequina, new species: Fig. 3: Indian Cay, Grand Bahama I. (ANSP 366927), 240x; Fig. 4: holotype, Devil's Bay, Grenada (USNM 1291335), 1,000x. Figs. 5–6: Decoradrillia interstincta, new species, "Big Rocks", Utila I., Bay Is., Honduras (ANSP 464986), 250x & 1,000x, respectively.
FIGURE 3. Enneophyllus ecarina n in Enneophyllus ecarina, a new species of scaphopod shell dwelling hermit crab (Crustacea: Decapoda: Anomura: Paguridae) from deep-sea off the Ryukyu Islands, southern Japan
FIGURE 3. Enneophyllus ecarina n. sp., holotype, male (sl 1.64 mm), CBM-ZC 13592. A, left chela, dorsal view; B, carpus of left cheliped, dorsal view; C, left cheliped, mesial view; D, same, lateral view; E, right pereopod 2, lateral view; F. left pereopod 3, lateral view; G, H, dactyli of right pereopod 2 and left pereopod 3, respectively.
FIGURE 1. Enneophyllus ecarina n in Enneophyllus ecarina, a new species of scaphopod shell dwelling hermit crab (Crustacea: Decapoda: Anomura: Paguridae) from deep-sea off the Ryukyu Islands, southern Japan
FIGURE 1. Enneophyllus ecarina n. sp. A–L, holotype, male (sl 1.64 mm), CBM-ZC 13592; M, paratype, female (sl 1.60 mm), CBM-ZC 13593. A, carapace, cephalic appendages and left sexual tube, dorsal view; B, rostrum and left ocular acicle, dorsolateral view; C, left antennal peduncle, ventral view; D, left maxilliped 3, lateral view; E, same, ischium and basis, ventral view; F, left pereopod 4, lateral view; G, sternal lobe of thoracic sternite 6 (pereopods 3); H, sternal lobes of thoracic sternites 7 and 8 and coxae of pereopods 5; I, tip of left sexual tube; J, carapace and pleon, dorsal view; K, tergum of pleomere 6 and uropods, dorsal view; L, telson, outer view; M, coxae of pereopods 3 and sternal lobe of thoracic sternite 6.
FIGURE 2. Enneophyllus ecarina n in Enneophyllus ecarina, a new species of scaphopod shell dwelling hermit crab (Crustacea: Decapoda: Anomura: Paguridae) from deep-sea off the Ryukyu Islands, southern Japan
FIGURE 2. Enneophyllus ecarina n. sp. A–D, holotype, male (sl 1.64 mm), CBM-ZC 13592; E, paratype, female (sl 1.60 mm), CBM-ZC 13593. A, right cheliped, mesial view; B, same, lateral view; C, right chela, dorsal view; D, carpus of right cheliped, dorsal view; E. right chela, dorsal view.
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>
Figure 1 in The balanced life: evolution of ventral shell weighting in gastropods
Figure 1. Examples of Recent gastropods with a ventral callus. All specimens are in the Vermeij collection. A, Monetarla caputserpentis Linnaeus, 1758 (Cypraeidae), reef off Nchesar, Babeldaob, Palau, collected 5 September 1975; cypraeiform callus. B, Cypraecassis testiculus Linnaeus, 1758 (Cassidae), grassbeds, Isla Galeta, Atlantic Panama, collected 12 April 1975; cassiform callus. C, Vasum rhinoceros Gmelin, 1791 (Vasidae), in grassbeds, Klkambala, Kenya, collected June 1972; modified cassiform callus. D, Gutturnium muriclnum Roding, 1798 (Cymatlidae), at depth of 4 m lying on its dorsal side, northeast coast of Urukthape1, Palau, collected 19 June 1984 by Roy K. Kropp; modified cassiform callus. E, Polinices mammilla Linnaeus, 1758 (Naticidae), Cocotiers beach, Nosy-Be, Madagascar, collected 29 June 1972; pseudoliviform callus. F, Phrontis luteostoma Broderip & Sowerby, 1829 (Nassariidae), Playa Venado, Pacific Panama, collected 28 August 1969; cassiform callus. G, Ministrombus variabilis Swainson, 1820 (Strombldae), depth of 12 m, Malakal, Palau, collected 9 July 1984 by Roy K. Kropp; modified cassiform callus. H, Nassarius pullus Linnaeus, 1758 (Nassariidae), grassbed, Taneti Island, Maluku, Indonesia, collected 12 July 1979; cassiform callus. I, Linnerita polita Linnaeus, 1758 (Neritidae), Tagachan Point, Guam, collected 26 May 1981; modified cassiform callus. Scale bar: 1 cm.
FIGURE 3. Flexopecten felipponei. A. Left valve. B. Right valve. C in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina
FIGURE 3. Flexopecten felipponei. A. Left valve. B. Right valve. C. Fold of Post-nepioconch of LV stage. D. Anterior auricle and byssal notch. E. Microsculpture of LV Nepioconch. F. Prodissoconch of RV. Scale bars: A= 1 mm; B= 1 mm; C= 200 µm; D= 400 µm; E = 80 µm; F=100 µm. All specimens from Fracasso Beach (42.39754S, 64.19199W), Chubut Province, Argentina (CNP-INV 4084).
FIGURE 2. Aequipecten tehuelchus. A. Left valve. B. Right valve. C in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina
FIGURE 2. Aequipecten tehuelchus. A. Left valve. B. Right valve. C. Radial rib with scales of LV. D. Detail of scales. E. Anterior auricle and byssal notch of RV. F. Detail of ctenolium. G. Microsculpture of Nepioconch of LR. H. Prodissoconch. Scale bars: A= 500 µm; B= 500 µm; C= 200 µm; D= 50 µm; E= 400 µm; F=100 µm; G=100 µm; H=50 µm. All specimens from Fracasso Beach (42.39754S, 64.19199W), Chubut Province, Argentina (CNP-INV 4085).
FIGURE 1 in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina
FIGURE 1. Morphological characters of shell. A. Left valve. B. Right valve. Abbreviations: P-1, prodissoconch-1; P-2, prodissoconch-2; AA, anterior auricle; AC, active ctenolium; ADP, connection point of auricle with disc; α, angle; BF, byssal fasciole; BN, byssal notch; BS, byssal sinus; EHP extreme point of the hinge; FMA, free margin of auricle; IR, inter-rib space; PriS, prismatic stage; N, Nepioconch; PN, Post-nepioconch; PA, posterior auricle; R, rib; S, scale.
FIGURE 4. Zygochlamys patagonica. A. Left valve. B. Right valve. C in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina
FIGURE 4. Zygochlamys patagonica. A. Left valve. B. Right valve. C. Post-nepioconch of LV. D. Anterior auricle and byssal notch. E. Microsculpture of Nepioconch of LV. F. Prodissoconch. Scale bars: A= 500 µm; B= 500 µm; C= 200 µm; D= 200 µm; E=100 µm; F=100 µm. All specimens from Fracasso Beach (42.39754S, 64.19199W), Chubut Province, Argentina (CNP-INV 4086).
Columella Shell Beads (80a1025)
**Columella Shell Beads** Location: Wall site (31Or11), Orange County, North Carolina. Period: Late Woodland (AD 1500-1600). Material: marine shell. Dimensions: length, 23.1 cm; width, 18.2 cm (background size). Notes: Catalog no. 80a1025, North Carolina Archaeological Collection, Research Laboratories of Archaeology, University of North Carolina at Chapel Hill. Model by Sebastian Farris. Source: Objaverse 1.0 / Sketchfab
Shell Gorget (1040a1359-2-2)
**Shell Gorget** Location: Town Creek site (31Mg2-3), Montgomery County, North Carolina. Period: Mississippian, Pee Dee phase (AD 1150-1400). Material: marine shell. Dimensions: length, 104.1 mm; width, 92.8 mm; thickness, 53.6 mm. Notes: Catalog no. 1040a1359-2 (specimen 2 of 2). North Carolina Archaeological Collection, Research Laboratories of Archaeology, University of North Carolina at Chapel Hill. Model by Steve Davis. Source: Objaverse 1.0 / Sketchfab
Incised Bowl Rim Crushed Shell Temper 500-800 Yo
Source: Objaverse 1.0 / Sketchfab
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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)
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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.