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9 results for “stinger”
Figure 5 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 5. Histochemistry of the Potamotrygon rex stingray: back (A: B: C: D; E) and stinger (F; G; H, I). (A) Micrograph showing mucous cells positive by the PAS histochemical method. (B) Image magnification showing that epithelial cells also presented positive cytoplasm to PAS, as well as the basal membrane (Bm). (C) Alcian Blue positive epithelial cells. (D) Epithelial cells positive to Bromophenol Blue, detail (Pr) Protein reserve strongly positive for Bromophenol Blue. (E) granulosa cells positive to Bromophenol Blue. (F, G, H, I) Stinger regions with all Bromophenol Blue positive cells. Ct- connective tissue; Bm- basal membrane; Mc – mucous cell; Pr- protein reserve (arrows); Mr- mineralized region; Gc – granulosa cell; Cm- chromatophores; DLR - dorsolateral region; VLR- ventrolateral region.
Figure 1 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 1. Collection sites for the tissues of the back and stinger of the Potamotrygon rex stingray, numbered according to their position. (A) Back of the stingray: 1- median tail; 2- base of the tail; 3- cephalic region; 4- left lateral fin; 5- right lateral fin. (B) Stinger: 1- apex; 2-middle and 3- base. (C) Scheme showing transversal section of the stinger regions that were analyzed under light microscopy. DR- Dorsal Region, DLR- Dorsolateral Region, VLR- Ventrolateral Region.
Figure 3 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 3. Photomicrograph of the back and stinger of the Potamotrygon rex's epidermis. (A) General view of the back. (C) Detail of the epithelial tissue of the back showing the layers: Sup- superficial; Int- intermediary; Bas- basal. (E) Detail of the basal layer showing the granulosa cell (arrow). (B. D and F) Different regions of the stinger and the different layers of the epithelium: Sup- superficial, Intintermediate, Bas- basal. (G) Cross section of the stinger showing the superficial (Sup) and intermediate (Int) layers, where it is possible to notice the epithelial cells of the intermediate layer. Et- epithelial tissue, Ct- connective tissue; Dd- dermal denticle; Mc- mucous cell; Gc – granulosa cell; Pr- protein reserve; Cm- chromatophores; DLR - dorsolateral region; VLR- ventrolateral region; Mr- mineralized region. (A-F) H&E stain. (G) PAS stain.
Figure 2 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 2. Adult female specimen of the stingray Potamotrygon rex. (A) Dorsal view of the stingray. (B) Tail of the stingray with two stingers attached to the middle portion of the tail, in the dorsal region, where the outermost stinger (*) is larger than the innermost one.
Prevalent bee venom genes evolved before the stinger and eusociality
<p>Background: Venoms, which have evolved numerous times in animals, are ideal models of convergent trait evolution. However, detailed genomic studies of toxin-encoding genes exist for only a few animal groups. The hyper-diverse hymenopteran insects are the most speciose venomous clade, but investigation of the origin of their venom genes has been largely neglected.</p> <p>Results: Utilising a combination of genomic and proteo-transcriptomic data, we investigated the origin of 11 toxin genes in 29 published and 3 new hymenopteran genomes and compiled an up-to-date list of prevalent bee venom proteins. Observed patterns indicate that bee venom genes predominantly originate through single gene co-option with gene duplication contributing to subsequent diversification.</p> <p>Conclusions: Most Hymenoptera venom genes are shared by all members of the clade and only melittin and the new venom protein family anthophilin1 appear unique to the bee lineage. Most venom proteins thus predate the mega-radiation of hymenopterans and the evolution of the aculeate stinger.</p>
Data from: Evolution and functional implications of stinger shape in ants
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Morphological measurements of the ant stinging apparatus associated with: Evolutionary simplification and functional shifts of the ant stinger
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Figure 4 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 4. Micrographs demonstrating cell morphology along the back of the Potamotrygon rex stingray.Et- epithelial tissue, Ct- connective tissue. H&E stain. Bar = 100µm.
A honeybee stinger inspired self-interlocking microneedle patch and its application in myocardial infarction treatment
GEO Series GSE201196. Rattus norvegicus. 24 samples. Type: Expression profiling by high throughput sequencing.
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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.