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6,175 results for “Composition”
Data from: The early composition and evolution of the turtle shell (Reptilia, Testudinata)
The shell of the oldest true turtle (Testudinata) branch (Proterochersidae) from the Late Triassic (Norian) of Poland and Germany was built in its anterior and posterior part from an osteodermal mosaic which developed several million years after the plastron, neurals, and costal bones. The most detailed description of the shell composition in proterochersids thus far is provided together with a review of the shell composition in other Triassic pantestudinates, the scenario of early evolution of the turtle shell is proposed based on new data, and the possible adaptive meaning of the observed evolutionary changes is discussed. These observations are consistent with the trend of shell simplification previously reported in turtles. Several aspects of proterochersid shell anatomy are intermediate between O. semitestacea and more derived turtles, supporting their stem phylogenetic position. Three additional ossifications were sutured to xiphiplastra and pelvis in Proterochersis spp. and at least in some individuals the nuchal bone was paired. The peripherals, suprapygals, and pygal bone are most likely of osteodermal origin and homologous to the proterochersid shell mosaic.
Data from: Mitochondrial membranes in cardiac muscle from Antarctic notothenioid fishes vary in phospholipid composition and membrane fluidity
Antarctic notothenioid fishes are highly stenothermal, yet their tolerance for warming is species-dependent. Because a body of literature points to the loss of cardiac function as underlying thermal limits in ectothermic animals, we investigated potential relationships among properties of ventricular mitochondrial membranes in notothenioids with known differences in both cardiac mitochondrial metabolism and organismal thermal tolerance. Fluidity of mitochondrial membranes was quantified by fluorescence depolarization for the white-blooded Chaenocephalus aceratus and the red-blooded Notothenia coriiceps. In these same membranes, lipid compositions and products of lipid peroxidation, the latter of which can disrupt membrane order, were analyzed in both species and in a second icefish, Pseudochaenichthys georgianus. Mitochondrial membranes from C. aceratus were significantly more fluid than those of the more thermotolerant species N. coriiceps (P < .0001). Consistent with this, ratios of total phosphatidylethanolamine (PE) to total phosphatidylcholine (PC) were lower in membranes from both species of icefishes, compared to those of N. coriiceps (P < .05). However, membranes of N. coriiceps displayed a greater unsaturation index (P < .0001). No differences among species were found in membrane products of lipid peroxidation. With rising temperatures, greater contents of PC in mitochondrial membranes from ventricles of icefishes are likely to promote membrane hyperfluidization at a lower temperature than for cardiac mitochondrial membranes from the red-blooded notothenioid. We propose that physical and chemical properties of the mitochondrial membranes may contribute to some of the observed differences in thermal sensitivity of physiological function among these species.
Adze Handle, Half of Composite XCB-105-4039
Adze Handle, Half of Composite . XCB-105-4039. 400 BCE-100 CE XCB-105 Adamagan (Aleut for place of walrus hunters) is at the head of Morzhovoi Bay, western Alaska Peninsula. It is a massive village with multiple occupations. When it was occupied 400 BCE-100 CE, it was the largest village in the Arctic with an estimated 1000 people. It also has limited occupations dated 2200-1700 BCE, 1000-600 BCE, and 900-1100 CE. The Western Alaska Peninsula artifacts are presented as a result of the research conducted under grants NSF 9630072, NSF 9814086, NSF 9996372, NSF 9996415, NSF 1139266, NSF 1321411. H. Maschner, Principal Investigator. These artifacts were scanned with either a Faro Edge Arm or a Minolta Vivid 9i. Processed in Geomagic or Polyworks. 2-8 photos were used for texture in Geomagic Wrap. Original digitizing work done at the IVL at Id. St. Univ. Subsequent processing and publication completed at Global Digital Heritage. Source: Objaverse 1.0 / Sketchfab
Data and code to accompany the publication: Chemical and Pb isotope composition of phenocrysts from bentonites constrains the chronostratigraphy around the Cretaceous-Paleogene boundary in the Hell Creek region, Montana in G3
<p>EPMA data and analysis for Ikckert et al., 2015</p>
Observations of molecular hydrogen (H2) mixing ratio and stable isotopic composition (deuterium content) at the Cabauw tall tower in the Netherlands
<p>This zip file contains the final corrected data that were used for the journal article "Observations of molecular hydrogen mixing ratio and stable isotopic composition at the Cabauw tall tower in the Netherlands" by Batenburg et al., Atmospheric Environment, 2016, doi:10.1016/j.atmosenv.2016.09.058<br> <br> Please cite the original AtmosEnv article when using these data.<br> The paper also contains more information about how these data were collected and calibrated, and on how the quality control flags were assigned.</p> <p>All samples were collected at the Cabauw tower, at the CESAR site (51.971° N, 4.927° E, http://www.cesar-observatory.nl/).<br> H2 and deltaD(H2) are calibrated using one to four laboratory reference air cylinders, depending on measurement period.<br> The H2 mixing ratio of the reference cylinders was determined by UHEI-IUP, MPI-BGC, or the IMAU isotope laboratory.<br> The deltaD(H2) of the reference cylinders is, sometimes indirectly, linked to the VSMOW scale by measurements of air mixtures containing H2 standards of known isotopic composition.<br> H2 scale: MPI2009, Jordan and Steinberg, AMT, 2011, doi:10.5194/amt-4-509-2011<br> deltaD(H2) units: permil deviation from VSMOW, Gonfiantini et al., IAEA-TECDOC-825, IAEA</p> <p>Times are UTC. </p> <p><br> The corresponding author can be reached through annekebatenburg@gmail.com for questions.</p>
FIGURE 2 in The Eucnemidae (Coleoptera) of the Maritime Provinces of Canada: new records, observations on composition and zoogeography, and comments on the rarity of saproxylic beetles
FIGURE 2. The distribution of Epiphanis cornutus (Eschscholtz) and Hylis terminalis (LeConte) in the Maritime Provinces of Canada.
FIGURE 4 in The Eucnemidae (Coleoptera) of the Maritime Provinces of Canada: new records, observations on composition and zoogeography, and comments on the rarity of saproxylic beetles
FIGURE 4. The distribution of Onichodon canadensis (Brown), Dromaeolus harringtoni Horn, Deltometopus amoenicornis (Say), and Nematodes penetrans (LeConte), in the Maritime Provinces of Canada.
FIGURE 1 in The Eucnemidae (Coleoptera) of the Maritime Provinces of Canada: new records, observations on composition and zoogeography, and comments on the rarity of saproxylic beetles
FIGURE 1. The distribution of Isorhipis ruficornis (Say) and Isorhipis obliqua (Say) in the Maritime Provinces of Canada.
FIGURE 3 in The Eucnemidae (Coleoptera) of the Maritime Provinces of Canada: new records, observations on composition and zoogeography, and comments on the rarity of saproxylic beetles
FIGURE 3. The distribution of Microrhagus pectinatus LeConte, Microrhagus subsinuatus LeConte, and Microrhagus triangularis (Say) in the Maritime Provinces of Canada.
FIGURES 22–23 in A new and endangered species of the pseudoscorpion genus Lagynochthonius from a cave in Vietnam, with notes on chelal morphology and the composition of the Tyrannochthoniini (Arachnida, Chelonethi, Chthoniidae)
FIGURES 22–23. Lagynochthonius undescribed sp., male from Tobago, tip of fixed finger of right chela, showing displaced terminal tooth. 22, dorsal view; 23, lateral view.
FIGURES 2–12. Lagynochthonius fragilis n in A new and endangered species of the pseudoscorpion genus Lagynochthonius from a cave in Vietnam, with notes on chelal morphology and the composition of the Tyrannochthoniini (Arachnida, Chelonethi, Chthoniidae)
FIGURES 2–12. Lagynochthonius fragilis n. sp., female holotype. 2, carapace; 3, process of coxa I, lateral view; 4, process of coxa I, ventral view; 5, anterior margin of carapace; 6, right leg IV, lateral view; 7, tip of movable finger of chelicera, showing spinneret, distoventral view. 8, right chelicera. 9, apotele of right leg IV, lateral view; 10, arolium and basal piece of apotele of right leg IV, ventral view; 11, right leg I, lateral view; 12, flagellum of right chelicera. Abbreviations: Δ condyle of palpcoxa; λ base of cheliceral tectum; Μ muscles; po preocular seta; tap tapetum of anterior eye; tec tectum of chelicera. Divisions of scales lines 0.1 mm (figs 2-5, 8, 11), 0.05 mm (fig. 6) or 0.01 mm (figs 7, 9-10, 12).
FIGURE 11 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 11. Dorsal and lateral views of Morronia brevirostris (A–B) and Antarctobius malvinensis (C–D).
FIGURE 14 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 14. Map of Islas Malvinas showing distribution of Puranius scaber (circles); P. championi (squares); and P. exsculpticollis (triangles).
FIGURE 10 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 10. Map of southern South America showing distribution of Cylydrorhinus caudiculatus (squares); Falklandiellus suffodens (circles); Falklandius antarcticus (triangles); and Haversiella albolimbata (stars).
FIGURE 9 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 9. Dorsal and lateral views of Cylydrorhinus caudiculatus (A–B); Malvinius compressiventris (C–D); Cylydrorhinus lemniscatus (E–F); and Malvinius nordenskioeldi (G–H).
FIGURE 16 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 16. Comparative composition of Malvinian and Fuegian weevil faunas at family and subfamily levels. Dotted: Curculionoidea families other than Curculionidae. Red: Entiminae. Sky blue: Cyclominae. Yellow: Curculionidae. Violet: Cryptorrhynchinae. Pink: Cossoninae. Numbers indicate species recorded for each archipelago as total and percentage.
FIGURE 13 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 13. Map of Islas Malvinas showing distribution of Falklandius goliath (circles); F. kuscheli (squares); F. t u r b i - ficatus (triangles); and Germainiellus salebrosus (stars).
FIGURE 4 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 4. Number of specimens collected per genus. Colors indicate different species within each genus.
FIGURE 12 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 12. Map of Islas Malvinas showing distribution of Morronia brevirostris (green circles); Antarctobius abditus (blue circles); A. bidentatus (yellow squares); A. falklandicus (triangles); A. malvinensis (stars); and A. vulsus (orange squares).
FIGURE 8 in A preliminar overview of species composition and geographical distribution of Malvinian weevils (Insecta: Coleoptera: Curculionidae)
FIGURE 8. Map of Islas Malvinas showing distribution of Caneorhinus biangulatus (circles); Cylydrorhinus lemniscatus (squares); Malvinius compressiventris (triangles); and M. nordenskioeldi (stars).
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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.