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 14 of 14 for “"boundary formation"”.
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Mechanisms of bullseye boundary formation in Hibiscus trionum petal patterning
… axis are unknown. In particular, how a sharp boundary emerges to separate the two contrasting regions that makes the bullseye remains to be understood. My PhD adds to the current understanding of petal patterning mechanisms by investigating the genetic and cellular mechanisms of H. trionum …
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Investigating the cell surface code for compartment boundary formation in Drosophila embryos
… cells of different identity is crucial for the formation and function of tissues and organs. Tissues are compartmentalised to ensure organisation remains during dynamic processes, such as cell division and cell rearrangement. At Drosophila compartment boundaries, supracellular actomyosin cables …
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What are they gabbin about?: A relational realist approach to small stories (re)told on Gab
… (re)construction of collective identities and boundary formation, Alexander's (2006) work on the civil sphere and its civil/anti-civil symbolic codes and discourses of liberty and repression, and Georgakopoulou's (2013) concept of 'small stories,' I conducted a narrative analysis focused on the …
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A genetic analysis of somitogenesis in the Medaka (Oryzias latipes)
… in these pathways showing specific somite malformations are described. This was explained by functional redundancies among related genes that have resulted from a whole genome duplication which occurred in a teleost fish ancestor 350 million years ago. As distinct duplicates exist in different …
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Stress and structure evolution during Volmer-Weber growth of thin films
… A computer simulation of thin film formation by the Volmer-Weber mechanism was developed to model the nucleation and growth of individual islands that impinge and coalesce to form a continuous film. By including a size-dependent lattice contraction in pre-coalescence islands, the …
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Changes of nucleosome positioning and 3D chromatin organization in cell transitions
… and proposed a new model of chromatin boundary formation through ordered, asymmetric nucleosome arrays. Chapter 3 documents my work on the connection between nucleosome positioning and chromatin state using machine learning. We developed a general methodology for this task and provided …
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The Impact and Role of Boundary Spanners and Boundary Objects in Global Project Networks
… century technological advances such as information technology, AEC firms are now capable of collaborating in a dispersed manner both on the projects and among participants. Because of the global outlook of firms, particularly to remain competitive and to reach new markets, project network …
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Segregation and embrittlement in metallic interfaces : bounds, models, and trends
… the excess free energy associated with grain boundary formation drives rapid grain growth in pure nanostructured metals at low homologous temperatures [4], preventing traditional (hot) forming and consolidation techniques and restricting practical usage. Such microstructural instability can be …
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Mechanism of cell adhesion at the midbrain-hindbrain neural plate in the teleost Danio rerio
… death of the organism. The midbrain-hindbrain boundary (also termed isthmic organizer) is a region of high interest as well in early as also in later development. The isthmic region carries organizer identity by the expression and subsequent release of FGF8. False patterning events of this …
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Spatial Optimization Techniques for School Redistricting
… structure and are often coterminous with the boundary of a city or a county. School districts play an important role in the functioning of society. In a well-run school district with safe and well-functioning schools, graduating enough students can enhance the quality of life in its area. …
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Role of ephrinB2 and EphB4 in mouse retinal angiogenesis
… substances are playing an important role for the formation of the primary vascular network during embryonal development, as well as for the distinction and boundary formation between arteries and veins. <br>In order to verify the presence of both substances in the retina RNA was isolated from …
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Microseismic observations in the Ceres-Tulbagh aftershock zone, Western Cape, South Africa, and their tectonic implications
… could be the manifestation of an incipient plate boundary formation.
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The role of <em>Pax7</em> in the formation of the superior colliculus and the vertebrate visual system
This thesis has explored the role of Pax7 in formation and maturation of the mouse superior colliculus, an important brain region associated with topographic visual input and the capacity to evoke appropriate visuomotor responses to environmental stimuli. The research performed was explicitly …
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High-resolution sequence stratigraphy and diagenesis of mixed carbonate/siliciclastic successions.
… non-deposition/marine flooding at a parasequence boundary. The results also indicate that the application of sequence stratigraphic theory can be used to predict the presence and location of early diagenetic concretions within similar successions. Analysis of early diagenetic features within …