3 resultados para fruitful native

em DRUM (Digital Repository at the University of Maryland)


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In 1898 the United States illegally annexed the Hawaiian Islands over the protests of Queen Liliʽuokalani and the Hawaiian people. American hegemony has been deepened in the intervening years through a range of colonizing practices that alienate Kanaka Maoli, the indigenous people of Hawaiʽi, from their land and culture. Dissonant Belonging and the Making of Community is an exploration of contemporary Hawaiian peoplehood that reclaims indigenous conceptions of multiethnicity from colonizing narratives of nation and race. Drawing from archival holdings at the University of Hawaiʽi, Mānoa and in-depth interviews, this project offers an analysis of public and everyday discourses of nation, race, and peoplehood to trace the discursive struggle over Local identity and politics. A context-specific social formation in Hawaiʽi, “Local” is commonly understood as a multiethnic identity that has its roots in working-class, ethnic minority culture of the mid-twentieth century. However, American discourses of race and, later, multiethnicity have functioned to render invisible the indigenous roots of this social formation. Dissonant Belonging and the Making of Community reclaims these roots as an important site of indigenous resistance to American colonialism. It traces, on the one hand, the ways in which Native Hawaiian resistance has been alternately erased and appropriated. On the other hand, it explores the meanings of Local identity to Native Hawaiians and the ways in which indigenous conceptions of multiethnicity enabled a thriving community under conditions of colonialism.

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The delicate balance between the production and disposal of proteins is vital for the changes required in the cell to respond to given stimulus. Ubiquitination is a protein modification with a range of signaling outcomes when ubiquitin is attached to a protein through a highly ordered enzymatic cascade process. Understanding ubiquitination is a growing field and nowadays the application of chemical reactions allows the isolation of quantitative materials for structural studies. Therefore, in this dissertation it is described some of these suitable chemical methodologies to produce an isopeptide bond toward the polymerization of ubiquitin bypassing the enzymatic control with the purpose of showing if these chemical modifications have a direct impact on the structure of ubiquitin. First, the possibility of incorporating non-natural lysine analogs known as mercaptolysines into the polypeptide chain of Ubiquitin was explored when they were attached to ubiquitin by native chemical ligation at its C terminus. The sulfhydryl group was used for the attachment of a paramagnetic label to map the surface of ubiquitin. Second, the condensation catalyzed by silver nitrate was used for the dimer assembly. In particular, the main focus was on examining whether orthogonal protection and deprotection of each monomer have an impact on the reaction yield, since the synthetic strategy has been previously attempted successfully. Third, the formation of ubiquitin dimers was approached by building an inter-ubiquitin linkage mimicking the isopeptide bond with two approaches, the classic disulfide exchange as well as the thiol-ene click reaction by thermal initiation in aqueous conditions. After assembling the dimeric units, they were studied by Nuclear Magnetic Resonance, in order to establish a conformational state profile which depends on the pH conditions. The latter is a very important concept since some ligands have a preferred affinity when the protein-protein hydrophobic patches are in close proximity.

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Increasing plant diversity in conventionally monoculture agrosystems has been promoted as a method to enhance beneficial arthropod density and efficacy, suppress herbivory and provide a range of ecosystem services. I investigated the pest suppressive potential and economic impact of plant diversification in organic field corn. The experiment consisted of two treatments, corn grown in monoculture (C) and bordered by strips of partridge pea (PP). Pest and natural enemy populations, corn damage, yield, and profits were compared among treatments. Natural enemy and herbivore arthropod populations were affected by treatment and distance from plot border. Corn damage due to pests was also affected by treatment and location, but did not significantly affect yield. Yield in monoculture plots was generally greater than in PP but did not result in greater profit. Pest and natural enemy arthropod abundances were elevated in partridge pea treatment borders, but these populations did not consistently diffuse into plot interiors. The potential causes and implications of findings are discussed.