http://hdl.handle.net/10150/129651 Thu, 20 Jun 2013 08:25:09 GMT 2013-06-20T08:25:09Z http://arizona.openrepository.com:80/arizona/retrieve/313668/Masters-Theses.jpg http://hdl.handle.net/10150/129651 http://hdl.handle.net/10150/294029 Title: Synthesis and Characterization of [FeFe] Hydrogenase Mimics Author: Swenson, Matthew Abstract: The hydrogenase enzyme catalytically converts protons to hydrogen. The hydrogenase enzyme contains a number of [Fe₄S₄] clusters that act as an electron transport chain, shuttling electrons to the active site. To replicate this, [FeFe]hydrogenase mimics featuring redox active quinone moieties annealed onto an Fe₂S₂(CO)₆ core were synthesized. EPR of these compounds revealed significant communication between the quinone ligand and the Fe₂S₂(CO)₆ core upon one electron reduction. Mimics featuring the redox active 2-phenylazopyridine ligand annealed onto [μ-1,3-propanedithiolato]bis(tricarbonyliron) and [μ-1,2-benzenedithiolato]bis (tricarbonyliron) were also synthesized. UV-Visible spectroscopy showed that metal to ligand charge transfer was occurring in these complexes The hydrogenase enzyme also contains a proton transport chain. [μ-1,2-Benzenedithiolato]bis(tricarbonyliron) complexes substituted with hydrogen donating phosphines were synthesized to mimic this. Attempts to synthesize the thiol substituted phosphine complex were unsuccessful, so protection group chemistry was employed. Electrochemistry of the resulting complexes showed an increase in catalytic current as well as a decrease in overpotential, when compared to the triphenylphosphine substituted complex. Finally, an effort to combine a redox active and hydrogen donating moiety into a single complex using substituted 2-phenylazopyradine moieties was attempted without success. Tue, 01 Jan 2013 00:00:00 GMT http://hdl.handle.net/10150/294029 2013-01-01T00:00:00Z http://hdl.handle.net/10150/294028 Title: The Desert Cahuilla: A Study of Cultural Landscapes and Historic Settlements Author: Lewis, Larea Mae Abstract: A strong relationship exists between the Cahuilla people and their cultural landscapes. The meaning of cultural places is expressed through traditional knowledge of oral histories, place names, traditional songs, ceremonies and landscape use. Historically, the Cahuilla maintained their relationship with landscapes while incorporating new lifestyles introduced by the Spanish, Mexicans, and Americans. My thesis provides a basic model for examining historical settlements patterns and analyzing the continued traditional lifestyle and landscape by the Desert Cahuilla. Using information from published ethnographic data and traditional knowledge, I use GIS mapping to provide visual support to some hypotheses scholars have on village migrations and continued cultural landscape use. This is the first step in researching historic cultural landscape use and the information can be used in further analysis in archaeology and cultural resource use. Furthermore, this thesis will serve as a significant source in rediscovering, reconnecting, and preserving Cahuilla places. Tue, 01 Jan 2013 00:00:00 GMT http://hdl.handle.net/10150/294028 2013-01-01T00:00:00Z http://hdl.handle.net/10150/294043 Title: Sacred Sites and the Perpetuation of Religious Beliefs: Indigenous Understandings and Western Perspectives within Legal Frameworks Author: Avila, Rosemary Michelle Abstract: The way in which land is understood and perceived among American Indians and non-Indians is the cause for vast cultural misunderstandings and divisions between the two groups. For American Indian communities, attachments to place are at the core of religious practices, therefore intrinsically linking the importance of one to the other. This thesis attempts to better understand the way in which American Indians maintain connections to sacred sites, the challenges of access to those sites, and how their conceptualizations differ from Western models of value. This thesis examines the ability of federal policies, cases, legislative processes, and legal frameworks to protect American Indian sacred sites when the cultural context in which this protection is afforded has undeniable discrepancies to American Indian beliefs. Sat, 01 Jan 2011 00:00:00 GMT http://hdl.handle.net/10150/294043 2011-01-01T00:00:00Z http://hdl.handle.net/10150/294041 Title: The Universal Law of Nature Formulation of the Categorical Imperative Author: Maldonado, Dylan Abstract: In the Groundwork for the Metaphysics of Morals, Kant gives several formulations of the categorical imperative, one being the universal law of nature formulation. One question that can be raised is why Kant formulates the categorical imperative in terms of universal laws of nature at all. In this paper, I will argue that it is necessary for Kant to formulate the categorical imperative in terms of universal laws of nature in order to demonstrate the applicability of the moral law to our maxims and hence the possibility of the moral law as a functional practical principle. Tue, 01 Jan 2013 00:00:00 GMT http://hdl.handle.net/10150/294041 2013-01-01T00:00:00Z