Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"axis elongation"”.
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Notochord morphogenesis as a mechanical driver of embryo axis elongation
… morphology. A key step in this process is the elongation of the head-to-tail, or anterior-posterior (AP) embryonic axis. For axis elongation to occur, multiple tissues must deform concomitantly, often elongating through a combination of convergence and extension and/or volumetric growth. As …
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The Role of Cell Division Orientation during Zebrafish Early Development
… orientation have been implicated in both body axis elongation and neural rod formation, although there is little direct evidence for a critical function of SDO in either of these processes. Making use of extended time-lapse, multi-photon microscopy and a careful three-dimensional analysis of …
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The mechanical characteristics and differentiation potential of the axial progenitor region in vertebrate embryos
Vertebrate embryos grow and pattern their body axis in an anterior-to-posterior direction, relying on a pool of multipotent cells at the posterior end. This region is known as the progenitor zone (PZ) and contains neural tube (NT) and presomitic mesoderm (PSM) progenitors, as well as a bi-potent …
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Regulation of polycomb repressive complexes at the neural differentiation gene Pax6
During body axis elongation spinal cord neural tissue in the posterior of the embryo is progressively generated from a pool of bipotent progenitors of the stem zone/caudal lateral epiblast, termed neuromesodermal progenitors. Neural differentiation gene transcription begins in a sharply defined …
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The regulation of tissue proportions: analysis of progenitor behavioural dynamics in response to cell ablation in the zebrafish tailbud.
… a head to tail progression known as primary body axis elongation. This begins with the differentiation and morphogenetic events of gastrulation which initially give rise to the head and anterior trunk. During this phase of development, it has been shown that the proportions of germ-layer …
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Enhancement Of Magnetic Vortex Pinning by APCs with Coherent BZO 1D-APC/YBCO Interface
… the difference in pinning force generated by c-axis (direction of film growth) aligned one-dimensional (1D) APC fabricated with BaZrO3 (BZO) on one hand and BaHfO3 (BHO) on the other. A considerably higher pinning force density (Fp) was observed on the BHO 1D-APCs, which was attributed to a less …
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The co-crystallisation of sugars by the supersaturation process
… did provide some data to further this argument, axis elongation for co-crystallised material is suggestive of a sopping of the main phase. However, determination of the unit cell volumes did not yield conclusive evidence to help prove this hypothesis though. This behaviour in both forms of …
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Multi-scalar mechanisms timing axial progenitor contribution to the vertebrate body axis
… to ensure that cells are allocated to the body axis in a controlled manner. The prevailing model for regulation of the timing of progenitor contribution to the body axis centres around a changing Hox gene expression complement in the population (‘The Hox Clock’) that can influence the timing …
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The evolution of somitogenesis: Mechanisms of paraxial mesoderm elongation in zebrafish and other vertebrates
… of the adult spine. This process involves elongation and segmentation of the paraxial mesoderm to form somites. Although the segmentation aspect of this has been widely studied, the elongation aspect is not well understood. Posterior growth is widely assumed to be the main driver, but there …