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ASU Electronic Theses and Dissertations


This collection includes most of the ASU Theses and Dissertations from 2011 to present. ASU Theses and Dissertations are available in downloadable PDF format; however, a small percentage of items are under embargo. Information about the dissertations/theses includes degree information, committee members, an abstract, supporting data or media.

In addition to the electronic theses found in the ASU Digital Repository, ASU Theses and Dissertations can be found in the ASU Library Catalog.

Dissertations and Theses granted by Arizona State University are archived and made available through a joint effort of the ASU Graduate College and the ASU Libraries. For more information or questions about this collection contact or visit the Digital Repository ETD Library Guide or contact the ASU Graduate College at gradformat@asu.edu.


Some cyanobacteria, referred to as boring or euendolithic, are capable of excavating tunnels into calcareous substrates, both mineral and biogenic. The erosive activity of these cyanobacteria results in the destruction of coastal limestones and dead corals, the reworking of carbonate sands, and the cementation of microbialites. They thus link the biological and mineral parts of the global carbon cycle directly. They are also relevant for marine aquaculture as pests of mollusk populations. In spite of their importance, the mechanism by which these cyanobacteria bore remains unknown. In fact, boring by phototrophs is geochemically paradoxical, in that they should promote precipitation …

Contributors
Ramírez-Reinat, Edgardo Luis, Garcia-Pichel, Ferran, Chandler, Douglas, et al.
Created Date
2010

Teleosts have the most primitive adaptive immune system. However, in terms of functionality the teleost immune system is similar to birds and mammals. On the other hand, enteric bacterial pathogens of mammals and birds present conserved regulatory mechanisms that control virulence factors. In this context, deletion of conserved genes that control virulence factors have been successfully used as measure to construct live attenuated bacterial vaccines for mammals and birds. Here, I hypothesize that evolutionary conserved genes, which control virulence factors or are essential for bacterial physiology in Enterobacteriaceae, could be used as universal tools to design live attenuated recombinant bacterial …

Contributors
Santander, Javier, Curtiss, Roy Iii, Chandler, Douglas, et al.
Created Date
2012

Synechocystis sp PCC 6803 is a photosynthetic cyanobacterium that can be easily transformed to produce molecules of interest; this has increased Synechocystis’ popularity as a clean energy platform. Synechocystis has been shown to produce and excrete molecules such as fatty acids, isoprene, etc. after appropriate genetic modification. Challenges faced for large–scale growth of modified Synechocystis include abiotic stress, microbial contamination and high processing costs of product and cell material. Research reported in this dissertation contributes to solutions to these challenges. First, abiotic stress was addressed by overexpression of the heat shock protein ClpB1. In contrast to the wild type, the …

Contributors
Gonzalez Esquer, Cesar Raul, Vermaas, Willem, Chandler, Douglas, et al.
Created Date
2013

Coccidioidomycosis (valley fever) is caused by inhalation of arthrospores from soil-dwelling fungi, Coccidioides immitis and C. posadasii. This dimorphic fungus and disease are endemic to the southwestern United States, central valley in California and Mexico. The Genome of Coccidioidies has been sequenced but proteomic studies are absent. To address this gap in knowledge, we generated proteome of Spherulin (lysate of Spherule phase) using LC-MS/MS and identified over 1300 proteins. We also investigated lectin reactivity to spherules in human lung tissue based on the hypothesis that coccidioidal glycosylation is different from mammalian glycosylation, and therefore certain lectins would have differential binding …

Contributors
Kaushal, Setu, Lake, Douglas, Magee, Dewey Mitchell, et al.
Created Date
2015

Euendolithic cyanobacteria have the remarkable ability to actively excavate and grow within certain minerals. Their activity leads to increased erosion of marine and terrestrial carbonates, negatively affecting coral reef and bivalve ecology. Despite their environmental relevance, the boring mechanism has remained elusive and paradoxical, in that cyanobacteria alkalinize their surroundings, typically leading to carbonate precipitation, not dissolution. Thus, euendoliths must rely on unique adaptations to bore. Recent work using the filamentous model euendolith Mastigocoleus testarum strain BC008 indicated that excavation relied on transcellular calcium transport mediated by P-type ATPases, but the phenomenon remained unclear. Here I present evidence that excavation …

Contributors
Guida, Brandon Scott, Garcia-Pichel, Ferran, Chandler, Douglas, et al.
Created Date
2016