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 26921 for “"Mechanisms"”.
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Arenavirus Attenuation Mechanisms
Arenaviridae derives from the Latin word ‘arena’ meaning ‘sand’. When scientists first looked at arenavirus virions by transmission electron microscopy, they saw pleomorphic particles that had a sandy appearance. This sandy appearance was due to host ribosomes being incorporated into the virions. …
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Enzymatic Sulfurylation Mechanisms
<p>Sulfate activation and transfer to lipids, polysaccharides, and aminoalkyl phenols have been studied In a variety of biological systems. The transfer of S<sup>35</sup>O<sub>4</sub> from radioactive 3'-phosphoadenoslne 5'-phosphosulfate (PAPS<sup>35</sup>) into lipid-soluble material has been …
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Neuronal transmission mechanisms
Several techniques were used to study the morphology of the salivary apparatus of the cockroach, Nauphoeta cinevea. A general survey of the ultrastructure was made. The acinar cells were of two distinct types: peripheral and central cells. The ducts that these cells give rise to could be classified …
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Mechanisms of Chemiluminescence
3-Acetyl-4,4-dimethyl-1,2-dioxetane (1) was prepared by the base-catalyzed rearrangement of 4-bromo-3-hydroxy-3,5,5-trimethyl-1,2-dioxolane. Thermal decomposition of this dissymmetric dioxetane to acetone and methylglyoxal proceeds with an activation energy of 26.0 (+OR-) 1 kcal/mol and a log A of …
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Wrapping CAM mechanisms
This dissertation is a treatise on “wrapping cam mechanisms.” This intriguing mechanism is composed of a cam wrapped by a belt, chain, or other flexible follower. Such devices have also been referred to as band mechanisms. The flexible follower is assumed to be constrained such that there is no …
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Mechanisms of Translational Control
… approaches to investigate the fundamental mechanisms of translational control in ribosomes. Specifically, we examine the molecular basis of Sec stop codon suppression and insertion, as well as the phenotypic consequences of perturbations to this process. Additionally, we explore how …
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Mechanisms of pathological adipogenesis
… to study the roles of these variants and ionic mechanisms in bone metabolism. A better understanding of the mechanisms underlying pathological adipogenesis in bone may provide interesting therapeutic targets for disorders such as osteoporosis.
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Mechanisms of retroviral replication
… that majority of retroviruses employ similar mechanisms for specific RNA packaging. Better understanding of mechanisms of this process may help to develop new anti-retroviral drugs against such serious pathogens as human immunodeficiency virus types 1 and 2.;This study concerns with specific …
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Tamoxifen: Mechanisms of Resistance
… enhanced our understanding of the molecular mechanisms by which breast cancer cells may become resistant to tamoxifen treatment. Here I review our current understanding of the tamoxifen’s mechanism of altering estrogen signaling along with the current experimental and clinical work …
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Mechanisms Underlying Chronic Pain
Based on duration, pain is categorized as acute and chronic pain. Acute pain is a short-term phenomenon that resolves after the noxious stimulus is removed or the injury is healed. On the other hand, chronic pain is a long-lasting debilitating condition. In a substantial number of cases, acute pain …
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Mechanisms of TRAF Signaling
<p>This thesis describes the investigation of the mechanisms of signal transduction activated by tumor necrosis factor (TNF) superfamily proteins. Ligands of the TNF family engage TNF receptor (TNFR) family proteins, leading to a wide variety of cellular effects, these interactions are implicated …
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Mechanisms underlying spatial navigation
… in the RNNs, suggesting similar underlying mechanisms and providing a testbed for testing hypotheses about the ramp cells. One hypothesis is that ramp cells are an epiphenomenon or a holdover from learning and not used during task execution. To address this, I perturbed populations of ramp …
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Mechanisms of cytokinin action
1. Twenty-two synthetic analogues of adenine were tested for their ability to promote the growth of Chinese cabbage leaf discs. In general an adenine residue substituted in the N6 position with a group of moderate size is required for maximum growth activity. 2. Kinetin increases the turnover of …
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Mechanisms of polyphosphate degradation
… goal of my research has been to investigate the mechanisms by which inorganic polyphosphate (polyP) is degraded in vivo. PolyP is a linear chain of phosphate moieties linked through high-energy phosphoanhydride bonds and can range in size from three-phosphates-long to thousands. Naturally, these …
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Mechanisms of Concrete Scaling
Made available in DSpace on 2014-12-08T23:56:28Z (GMT). No. of bitstreams: 1 6604213.pdf: 5013286 bytes, checksum: 0e56db261f63d1c0e449971b00b04e3e (MD5) Previous issue date: 1965
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Molecular mechanisms regulating implantation
… for a successful implantation. To understand the mechanisms governing these complex interactions and better address the clinical challenges to infertility, it is important to integrate the information gained from these studies. Chapter I presents a detailed analysis of the knowledge gained from …
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Adhesion mechanisms of Acanthamoeba
Made available in DSpace on 2011-05-07T12:30:25Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9136679.pdf: 3507094 bytes, checksum: d9f1d897d82836c6484f182b3a2c4edb (MD5) Previous issue date: 1991
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