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44 results for “karst formations”
Figure 3 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Scanning electron microscopy images of fungal infection and anatomical abnormalities in primary disturbed zones. (a, b) Fungal hyphae present in tracheid lumens (arrows) in close proximity to the leaf trace. Radial sections, scale bars = 20 μm. (c) The onset of the tracheid cell wall degradation resulting in the formation of cell wall cracks (arrows). Radial section, scale bar = 10 μm. (d) Abnormally large cross-field pitting (arrows) at the intersections of longitudinal tracheids and ray parenchyma cells. Radial-section, scale bar = 20 μm. (e, f) Leaf trace conductive tissue (arrowhead) which is plugged and filled with polyphenolic compound deposits (arrows). Radial sections. Scale bar for (a) = 20 μm, scale bar for (b) = 10 μm</p>
Figure 2 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>The anatomy of indented annual growth ring tissues in the early stages of indentation. (a, b) Radial sections through the centre of the leaf trace showing twisted tracheids in large disturbed zones (arrows) which induce the onset of indentation (white arrowheads) within annual growth ring. Yellow arrowheads show the reorientation of tracheids towards the cambium in a radial direction. The dark red colour is due to the presence of polyphenolic compound deposits inside the leaf trace. Bright-field (a) and polarised light (b) microscopy, scale bars = 500 μm. (c) The effect of the asymmetry of the disturbed zone (arrows), associated with the leaf trace, on the depth of indentation within the annual growth ring (arrowheads). Cross-section, scale bar = 200 μm. (d) The onset of indentation after the termination of the leaf trace formation. Cross-section, scale bar = 500 μm. (e) The early stage of the disturbed zone formation (arrows) associated with the leaf trace growth. Tangential section, scale bar = 100 μm. (f) Intertwined tracheids in the marginal zone of indented annual growth ring. Radial section in polarised light microscopy, scale bar = 100 μm; agr, annual growth ring; lt, leaf trace; p, pith</p>
Figure 1 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Macroscopic characteristics of hazel wood zones. (a) Norway spruce stem disc containing the hazel wood zones, cross-section. The wedge-shaped samples, labelled B1–B3, denote different blocks separated by age for microscopic observations. Cross-section, scale bar = 2 cm. (b) Topographic profile of conical lenticular depressions within the fifth annual growth ring. The dark brown colour is due to the presence of polyphenolic compounds (arrows). Tangential section, scale bar = 1 mm. (c) Various sizes of hazel wood zones coming from the 10<sup>th</sup> annual growth ring. Tangential section, scale bar = 1 cm. (d) The 3-D model of the shape and dimensions of the annual growth ring indentation which shows rapid changes in the early stages of indentation development. Scale bar = 1 cm. (e) In the 3-D model, the empty spaces at the margins of indented annual growth rings (arrows) denote the secondary disturbed zones which spread through several annual growth rings. Scale bar = 0.5 cm</p>
Figure 4 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Distribution of resin ducts per unit area of wood within annual growth rings</p>
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.