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 13 of 13 for “"hypergravity"”.
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Spatial Disorientation in Hypergravity: Implication of oculomotor, otolithic and somatosensory cues
… visual perception of object position in hypergravity environment. This thesis takes an interest in i) sensorial information cues involved in perceptive illusions in hypergravity, ii) interindividuals differences in the estimation of visual horizon, iii) the role of egocentric and …
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Analyses of diverse stresses, including hypoxia, cyanide, and hypergravity in Caenorhabditis elegans
… including the response to cyanide, hypoxia, and hypergravity.</p> <p>Chapter 2 of this thesis focuses on understanding the mechanisms of cyanide resistance in C. elegans. We employed a novel microfluidic device to describe the resistance phenotypes with greater spatio-temporal resolution. The …
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Hormones, Simulated Microgravity and Hypergravity affect Bone and other Physiological Systems in Zebrafish Larvae
… Rotating Wall Vessel) and finally exposure to hypergravity and "relative microgravity" in the Large Diameter Centrifuge. By combining morphometric tools with an objective scoring system for the state of development for each element in the head skeleton, and specific gene expression analysis, we …
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The Effect of Hypergravity (2g) on Osteoblast Precursor Cells in the Periodontal Ligament of the Rat
… cells (C+D) was noted. To date, the effect of hypergravity (2g) on osteoblast histogenesis has not been studied in vivo. In vitro studies using nonphysiologic high levels of gravity (20,40g) have shown an increased proliferation of cloned osteoblast-like cells. The purpose of the present study …
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Hypergravitational stimulation of cell differentiation
… Despite this, in vitro compression of cells via hypergravity has received less attention than other applied forces of material properties, considering the availability of suitable centrifuges to the average biomedical scientist. Hypergravity is defined as any level of acceleration due to gravity …
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Hypergravitationsinduzierte Effekte auf cGMP-Konzentration humaner Melanozyten und Melanomzellen
… as an altered acceleration vector (micro- and hypergravity) may influence cell morphology, proliferation, response to growth factors, gene expression, and metabolism. Despite the growing interest in the regulation of signaling activities in normal and transformed cells under altered gravity …
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Einfluss von Hypergravitation auf den cGMP-Efflux in Stickstoffmonoxid-stimulierten humanen Melanozyten und Melanomzellen
… to gravity alteration. We examined whether hypergravity (up to 5g for 24 h) modulates the efflux of the second messenger cGMP under conditions of stimulated cGMP-synthesis. Due to the differential expression of functional guanylyl cyclase (GC) isoforms in normal human melanocytes (NHM) and …
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Differente Expression der Multidrug-Resistenz-Proteine 4/5 in nicht und stark metastasierenden Melanomzellen unter Hypergravitationsbedingungen
… exposure to mechanical stress in terms of hypergravity leads to an increased cGMP efflux in non-metastatic melanoma cell lines, whereas the highly metastatic phenotype appeared to be insensitive. Biochemical analysis let assume that overexpressed MRP4, 5 and 8 could be responsible for these …
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Einfluss der löslichen Guanylylzyklase auf die Expression der cGMP-Exporter MRP4 und 5 in humanen Melanomzellen unter Hypergravitationsbedingungen
… Earlier studies showed different influences of hypergravity on the cGMP- and cAMP-Efflux and the expression of the highly-selective nucleotide transporters MRP (multidrug resistance proteins) 4/5 in human melanocytes and melanoma cells with different metastatic behaviour. Based on these results …
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Dysrhythmias in Laypersons during Centrifuge-Simulated Suborbital Spaceflight
… on cardiac dysrhythmias in laypersons during hypergravity exposure. We report layperson electrocardiograph (ECG) findings and tolerance of dysrhythmias during centrifuge-simulated suborbital spaceflight. Methods: Volunteers participated in varied-length centrifuge training programs of 2-7 …
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Molecular and Functional Analysis of Otolith Formation in Zebrafish, Danio Rerio
… by raising fertilized eggs at simulated hypergravity for 8 days. Immediately after centrifugation, fewer fish survived, otolith sizes were significantly reduced, and the probability of losing an otolith increased with linear acceleration compared to fish at 1 x g control. When fish …
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Printing and coating of graphene and related materials for advanced devices
… foams. LHPs have been tested on ground and in hypergravity and microgravity conditions during parabolic flights.
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A Series of Studies Examining the Development of Sprint Speed and Momentum of International Rugby Union Players
… the different strength qualities. An 8 day hypergravity condition for international players was ineffective in producing profound changes in sprinting speed. These results suggest that sprinting speed is a trainable quality but there is a limited capacity for strength training to improve it …