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 20 of 188 for “"three dimensional structure"”.
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Radio-derived three-dimensional structure of a solar active region
… predict such events require determination of the three-dimensional distributions of density, temperature, and magnetic fields above such active regions. This thesis presents the structure of the solar atmosphere above active region AR 10923, observed on 2006 Nov 10, as deduced from …
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Approaches to determining the three-dimensional structure and dynamics of bacterial chromosomes
… of their nucleotides. Their folding into dynamic three-dimensional structures creates spatial relationships between loci that likely play important functional roles. Yet so far only the broad outlines of this spatial organization have been discerned. In chapter 2 of this thesis I describe a …
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Three-dimensional structure of a type III glutamine synthetase by single particle reconstruction
… studied with a view to better understanding its structure/functioning in relation to the extensively characterised GSIs. GSIIIs are the most recently discovered family of GSs and are the most phylogenitically distant GSs from the GSIs. Images (160) of negatively stained rGlnA, expressed in E.coli …
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Three-dimensional structure of the crust and mantle beneath the island of Hawaii.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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The tectonics and three-dimensional structure of spreading centers : microearthquake studies and tomographic inversions
… East Pacific Rise, and the pronounced en echelon structure of the Reykjanes Peninsula within southwestern Iceland. In this thesis, each of these different spreading centers is investigated with microearthquake studies or tomographic inversion of travel times. Results of these studies are used to …
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The tectonics and three-dimensional structure of spreading centers--microearthquake studies and tomographic inversions
… East Pacific Rise, and the pronounced en echelon structure of the Reykjanes Peninsula within southwestern Iceland. In this thesis, each of these different spreading centers is investigated with microearthquake studies or tomographic inversion of travel times. Results of these studies are used to …
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Soluble expression of plasmodium falciparum glutamine synthetase and three-dimensional structure by single particle reconstruction
[No subject] Malaria infection caused by the apicomplexa pathogen Plasmodium falciparum has a high rate of resistance to existing anti-malarial drugs. The World Health Organisation recommended interventions are unlikely to eliminate the growth of resistance and it would therefore be prudent to …
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Protein Three -Dimensional Structure: Theoretical and Computational Aspects of Structure Prediction Based on the Amino Acid Sequence
Given that the repertoire of secondary structure classifications is limited, we asked if there is a limited set, even if large, of structural features that describe the protein three-dimensional structure adequately. Towards this end, we created libraries of peptide fragments of sizes 7 to 13 …
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Three dimensional structure of a human Class II MHC protein HLA-DR1 bound to an endogenous peptide
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Theoretical and experimental studies on the structure of vertebrate visual pigments
High resolution three dimensional structure of visual pigments is essential for understanding the visual process. The past few years have been an exciting period in the field of the structure of visual pigments. One of the significant achievements is the 9A projection map of bovine rhodopsin. …
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Structure and motion from long image sequences
… object, they have a vivid perception of the three-dimensional structure of the object. In addition, if an object in the field of view is moving, humans can more easily separate the object from the background than if it were stationary. This thesis presents a computer algorithm which, given a …
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Molecular characterisation of the Haemolysin (HlyA) and the Region Downstream of hlyA in Vibrio cholerae O1
Provides insights into the structure/function relationships within the El Tor haemolysin (HlyA). Generates some constructs used to determine the three-dimensional structure of the protein and of the pore. The genetic organisation of the region flanking the hly locus suggests a pathogenicity island.
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The Structural Characterization and Bioactivity Assessment of Nonspecific Lipid Transfer Protein 1 (nsLTP1) from Caraway (Carum Carvi) Seeds
… 1 (nsLTP1) from caraway seed, determine its three-dimensional structure, and analyze protein-ligand complex interactions through docking studies. Also, evaluate nsLTP1 in vitro cytotoxic effect, antioxidant capacity, and thermal- and pH- stability.</p> <p><strong>Methods</strong>: Caraway …
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Growing machines
construction is developed in three dimensions. It is similarly shown that right-angled tetrahedrons, when folded from an edge-connected string, can generate any three dimensional structure where the primitive pixel (or voxel) is a rhombic hexahedron. This construction also suggests a concept of 3D …
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MARKOV STATE MODELS AND THEIR APPLICATIONS IN PROTEIN FOLDING SIMULATION, SMALL MOLECULE DESIGN, AND MEMBRANE PROTEIN MODELING
… to understand how proteins obtain their unique three-dimensional structure from their aminoacid sequences. The function of protein critically depends on its three- dimensional structure; hence, any internal (such as mutations) or external (such as high temperature) perturbation that obstructs …
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Improvements on low-cost high-resolution CT system
… based inspection technique used to analyze the three dimensional structure of an object. The goal of this thesis is to show that good CT image quality can be achieved with low cost CT systems while maintaining high resolution and keeping the collection time for a scan to a minimum (s;I hour). …
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Geometry-driven filamentary structures : elastic gridshells, weaves, clasps, and knots
… topics in the realm of the mechanics of slender structures involving strong geometric constraints: elastic gridshells, triaxial weaves, elastic clasps, and elastic knots. These studies involve a combination of geometric reasoning, high-fidelity numerical simulations, and precision model …
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