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342 results for “Electron Microscopy”
Experimental data used in the article entitled "Electron Microscopy Study of Structural Defects Formed in Additively Manufactured AlSi10Mg Alloy Processed by Equal Channel Angular Pressing"
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Scanning Electron Microscopy Datasets – Coccospheres and detached coccoliths in waters off the Southeast Pacific margin
<p>For enumeration of coccospheres and detached coccoliths polycarbonate filters were scanned at 800-1500x magnification using a Scanning Electron Microscopy (Quanta FEG 250). </p>
FIGURE 4. A–B. Ascodipteron species A in Investigation of taxonomically important morphological features of endoparasitic bat flies of the subfamily Ascodipterinae (Diptera: Streblidae) by scanning electron microscopy
FIGURE 4. A–B. Ascodipteron species A (ex. R. paradoxalophus), Tuyen Province, Vietnam. A. Overview of microvillilike organelles on subdermal surface of neosome. B. Enlargement of A. C– D. Ascodipteron emballonurae (ex. H. pomona), Quang Nam, Vietnam. C. Overview of microvillilike organelles on subdermal surface of neosome. D. Enlargement of C. E–F. Ascodipteron species A (ex. R. paradoxalophus), Tuyen Province, Vietnam. E. Anus, cerci, and genital orifice. F. Cercus, enlargement. Scale in microns.
FIGURE 5. A–D. Ascodipteron species A in Investigation of taxonomically important morphological features of endoparasitic bat flies of the subfamily Ascodipterinae (Diptera: Streblidae) by scanning electron microscopy
FIGURE 5. A–D. Ascodipteron species A (ex. H. pomona), larva (prepupa), Quang Nam Province, Vietnam. A. Ventroposterior aspect. B. Ventral spiracle (enlargement). C. Dorsoposterior aspect. D. Dorsal and ventral spiracles (enlargement). Abbreviations: ao, anal orifice; dsp, dorsal spiracle; vsp, ventral spiracle. Scale in microns.
FIGURE 3. A–B in Investigation of taxonomically important morphological features of endoparasitic bat flies of the subfamily Ascodipterinae (Diptera: Streblidae) by scanning electron microscopy
FIGURE 3. A–B. Ascodipteron emballonurae (ex. H. pomona), Quang Nam Province, Vietnam. A. Genital aperture, lateral view, arrows indicate spiracles. B. Genital aperture, lateral view, enlargement. C–D. Ascodipteron species A (ex. R. paradoxalophus), Tuyen Province, Vietnam. C. Genital aperture (arrow), lateral view. D. Genital aperture, lateral view, enlargement. E–F. Ascodipteron emballonurae (ex. H. pomona), spiracles, Quang Nam, Vietnam. E. Dorsal view. F. Lateral view. Abbreviations: sp5, sp6, sp7, respective numbered terminal spiracles. Scale in microns.
FIGURE 2. A–E in Investigation of taxonomically important morphological features of endoparasitic bat flies of the subfamily Ascodipterinae (Diptera: Streblidae) by scanning electron microscopy
FIGURE 2. A–E. Undescribed genus of Ascodipterinae (ex. R. affinis), Tuyen Province, Vietnam (A–B, D–E), and (ex. R. macrotis) Guangxi Province, China (C). A. Head and thorax, oblique lateral view. B. Labial theca, dorsal view. C. Labial theca, dorsal view (image by light microscopy). D. Labial theca, anterior view. E. Labial theca, anteroventral view. Abbreviation: lg, labial gutter. Scale in microns.
FIGURE 1. A–C. Ascodipteron species A in Investigation of taxonomically important morphological features of endoparasitic bat flies of the subfamily Ascodipterinae (Diptera: Streblidae) by scanning electron microscopy
FIGURE 1. A–C. Ascodipteron species A (ex. R. paradoxalophus), Tuyen Province, Vietnam. A. Head and thorax, dorsal view. Uppermost arrow indicates striations of underlying muscles of dorsal cheliceral blades. B. Head, lateral view. Arrows indicate striations of underlying muscles of dorsal and ventral cheliceral blades. C. Head, anterior view. Arrow indicates striations of ventral cheliceral blades. Abbreviations: ant, antenna; fr, frons; g, gena; lt, labial theca; lv, lateral vertex; sc, scutum. Scale in microns.
FIGURE 3. Myrcia federalis. Scanning Electron Microscopy. A in A new species of Myrcia (Myrtaceae) from the Federal District, Brazil, with micromorphological highlights
FIGURE 3. Myrcia federalis. Scanning Electron Microscopy. A. Stomata with crest and trichomes on the leaf abaxial surface. B-C. Epicuticular granulose wax on the leaf adaxial surface (arrow). D. Tricolpate pollen grain. TR: Trichome; CR: Stomatal crest.
Structural heterogeneity of cellular K5/K14 filaments as revealed by cryo-electron microscopy
<p>Keratin intermediate filaments are an essential and major component of the cytoskeleton in epithelial cells. They form a stable yet dynamic filamentous network extending from the nucleus to the cell periphery, which provides resistance to mechanical stresses. Mutations in keratin genes are related to a variety of epithelial tissue diseases. Despite their importance, the molecular structure of keratin filaments remains largely unknown. In this study, we analyzed the structure of keratin 5/keratin 14 filaments within ghost keratinocytes by cryo-electron microscopy and cryo-electron tomography. By averaging a large number of keratin segments, we have gained insights into the helical architecture of the filaments. Two-dimensional classification revealed profound variations in the diameter of keratin filaments and their subunit organization. Reconstitution of filaments of substantial length uncovered a high degree of internal heterogeneity along single filaments, which can contain regions of helical symmetry, regions with less symmetry and regions with significant diameter fluctuations. Cross section views of filaments revealed that keratins form hollow cylinders consisting of multiple protofilaments, with an electron dense core located in the center of the filament. These findings shed light on the complex and remarkable heterogenic architecture of keratin filaments, suggesting that they are highly flexible, dynamic cytoskeletal structures.</p>
FIGURE 3. Myrceugenia bananalensis. A–D. Scanning Electronic Microscopy. A in A new species of Myrceugenia (Myrteae, Myrtaceae) from Distrito Federal, Brazil, with notes on its micromorphology
FIGURE 3. Myrceugenia bananalensis. A–D. Scanning Electronic Microscopy. A. Abaxial leaf blade surface, stomata (arrow), stomatic crests and one trichome. B. Adaxial leaf blade surface, showing the arrangement of the epicuticular wax in platelets. C. Bracteole showing basal colleters (arrow). D. Tricolpate pollen grain. tr: trichome; cr: stomatic crest.
Figure 4 in Redescription of Macrolaimus crucis Maupas, 1900 (Nematoda: Rhabditida: Chambersiellidae) from Spain, with scanning electron microscopy study and a compendium of the genus
Figure 4. Macrolaimus spp. (A) M. arboreus; (B) M. canadensis; (C) M. crucis (cf. present paper); (D) M. hamatus; (E) M. natator; (F) M. richteri; (G) M. ruehmi; (H) M. taurus; (a) postvulval uterine sac; (b) female posterior end; (c) male posterior end; (d) spicule and gubernaculum (cf. Massey 1974). All drawings based on the original descriptions except those indicated.
Figure 3. Macrolaimus crucis Maupas, 1900 in Redescription of Macrolaimus crucis Maupas, 1900 (Nematoda: Rhabditida: Chambersiellidae) from Spain, with scanning electron microscopy study and a compendium of the genus
Figure 3. Macrolaimus crucis Maupas, 1900 (female, scanning electron micrographs). (A, B, C) Lip region in subventral (A, B) and frontal (C) view; (D) lateral field at deirid level (arrow points excretory pore); (E) lateral field at midbody (F, G) female tail in lateral and subventral view, respectively.
Figure 1. Macrolaimus crucis Maupas, 1900 in Redescription of Macrolaimus crucis Maupas, 1900 (Nematoda: Rhabditida: Chambersiellidae) from Spain, with scanning electron microscopy study and a compendium of the genus
Figure 1. Macrolaimus crucis Maupas, 1900. (A) Neck; (B) female reproductive system; (C) male posterior end; (D) female posterior end; (E) lip region; (F) entire male; (G) entire female.
Figure 2. Macrolaimus crucis Maupas, 1900 in Redescription of Macrolaimus crucis Maupas, 1900 (Nematoda: Rhabditida: Chambersiellidae) from Spain, with scanning electron microscopy study and a compendium of the genus
Figure 2. Macrolaimus crucis Maupas, 1900 (light micrographs). (A) Neck; (B) anterior end (C) vagina region (D); female posterior end; (E) male posterior end.
Figure 3 in Identification of Megaselia scalaris (Loew, 1866) (Diptera: Phoridae) in mummified human body from Itacambira (MG), Brazil, using scanning electron microscopy and cuticular hydrocarbons
Figure 3. Scanning electron microscopy of the puparium of Megaselia scalaris from a male mummy from Itacambira, Minas Gerais, Brazil: (A, B) Detailed view of the posterior spiracle, containing four openings arranged in parallel; (C, D) detail of the small tubercles located on the dorsal surface of the puparium.
Figure 2 in Identification of Megaselia scalaris (Loew, 1866) (Diptera: Phoridae) in mummified human body from Itacambira (MG), Brazil, using scanning electron microscopy and cuticular hydrocarbons
Figure 2. Scanning electron microscopy of the puparium of Megaselia scalaris from a male mummy from Itacambira, Minas Gerais, Brazil. (A) Overview (dorsal) of the puparium of Megaselia scalaris with the opening for adult emergence; (B) posterior spiracles (one pair), located at the posterior end of the puparium.
Figure 1 in Identification of Megaselia scalaris (Loew, 1866) (Diptera: Phoridae) in mummified human body from Itacambira (MG), Brazil, using scanning electron microscopy and cuticular hydrocarbons
Figure 1. Male mummy from Itacambira, Minas Gerais, Brazil. (A) Opening of the abdominal cavity of the mummy; (B) puparia of Megaselia scalaris (arrow) adhered to a rib (photographs by S. Novo).
FIGURE 2. Cimaria vargasi, scanning electron microscopy. A, D in Cimaria vargasi n. gen, n. sp. (Gastropoda: Pyramidellidae: Odostomiinae) from the Pacific Coast of Costa Rica, Central America
FIGURE 2. Cimaria vargasi, scanning electron microscopy. A, D - Holotype (MZUCR 8955); 2.2 × 1.3 mm. A. Whole shell in apertural view. D. Detail of sculpture. B, C - Paratype, juvenile (MZUCR 8956); 0.8 × 0.6 mm. B. Semiapertural view, showing shell scar. C. Apical view. Scale bars = 100 µm.
FIGURE 5–10. Amblyomma oblongoguttatum larva. 5 in Redescription of the larva of Amblyomma oblongoguttatum Koch, 1844 (Acari: Ixodidae) by light and scanning electron microscopy
FIGURE 5–10. Amblyomma oblongoguttatum larva. 5. Gnathosoma, dorsal view (30 µm); 6 Gnathosoma, ventral view (30 µm); 7. Detail of tibiotarsus and hypostome (30 µm); 8. Detail of scutum (30 µm); 9. Coxae I–III (20 µm); 10.Tarsus I, dorsal view (30 µm).
FIGURE 2. Amblyomma oblongoguttatum larva. Tarsus I in Redescription of the larva of Amblyomma oblongoguttatum Koch, 1844 (Acari: Ixodidae) by light and scanning electron microscopy
FIGURE 2. Amblyomma oblongoguttatum larva. Tarsus I dorsal views. Abbreviations: d—dorsal; a— antiaxial; p—paraxial; la—lateral anterior; lp—lateral posterior.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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