Dissertations / Theses on the topic 'Granite genesis'
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Petersson, Jesper. "The genesis and subsequent evolution of episyenites in the Bohus granite, Sweden /." Göteborg : Earth sciences centre, Göteborg university, 2002. http://catalogue.bnf.fr/ark:/12148/cb410815911.
Full textLinklater, Michael Anthony Leonard Flanders. "The exploration for and possible genesis of, some Archaean granite/gneiss-hosted gold deposits in the Pietersburg granite-greenstone terrane." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005557.
Full textDabrowski, Daniel. "Implications of Silurian granite genesis to the tectonic history of the Nashoba terrane, Eastern Massachusetts." Thesis, Boston College, 2014. http://hdl.handle.net/2345/3802.
Full textThe Nashoba terrane is a highly metamorphosed and sheared Paleozoic tectonic block in eastern Massachusetts. The metamorphic rocks that compose the terrane are intruded by a series of diorites, tonalites, and granites. The Andover Granite is a complex multiphase granitic suite found in the northern part of the Nashoba terrane and is composed of both foliated and unfoliated granites as well as a granodiorite phase. The Sgr Group of granites is a series of unfoliated granites exposed along the Nashoba-Avalon terrane boundary. New crystallization ages for the foliated Andover Granite and the Sudbury Granite, southernmost body of the Sgr Group of granites, are presented. CA-TIMS U-Pb geochronology on zircons collected from these granites yielded 419.43 ± 0.52 Ma and 419.65 ± 0.51 Ma crystallization ages for the foliated Andover Granite and a 420.49 ± 0.52 Ma crystallization age for the Sudbury Granite. Geochemical and petrographic analysis of these granites indicate that the foliated Andover Granite is a high-K calc-alkaline, peralmuminous, S-type, biotite + muscovite granite and the Sudbury granite is high-K calc-alkaline, metaluminous to slightly peraluminous, I-type, biotite granite. These two granites are interpreted to have formed from the anatexis of either Nashoba terrane metasedimentary rocks and/or its underlying basement just prior to the Acadian orogeny. It is proposed that when Silurian diorite/tonalite magmas intruded into the Nashoba terrane, the influx of magmatic heat was sufficient to trigger crustal melting and promote granite genesis. This petrogenetic scenario fits well with regional tectonic models showing the Silurio-Devonian convergence of Avalonia towards Ganderia (which formed the eastern side of composite Laurentia at the time) in the northern Appalachians. Prior to the collision of Avalonia to composite Laurentia, mafic and intermediate composition arc magmas intruded the eastern Ganderian margin. The large amount of heat that accompanied these intrusions is believed to have contributed to Acadian metamorphism and influenced the formation of granitic plutons along the margin. It is therefore proposed that the plutonic record of the Nashoba terrane shows that by the Late Silurian - Early Devonian, Avalonia was still outboard of Laurentia in the vicinity of southern New England
Thesis (MS) — Boston College, 2014
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Earth and Environmental Sciences
Ngai, Yuen-yi Helen, and 魏婉儀. "Soil genesis and vegetation growth in pulverized fuel ash and refuse landfills capped by decomposed granite." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31219780.
Full textNgai, Yuen-yi Helen. "Soil genesis and vegetation growth in pulverized fuel ash and refuse landfills capped by decomposed granite /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19471166.
Full textMiles, Andrew James. "Genesis of zoned granite plutons in the Iapetus Suture Zone : new constraints from high-precision micro-analysis of accessory minerals." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7751.
Full textBullen, Warwick David. "Gold mineralization in an archaean granite-greenstone remnant west of Melmoth, Natal ore genesis and implications for exploration." Thesis, Rhodes University, 1991. http://hdl.handle.net/10962/d1005579.
Full textCock, B. J. "Aspects of granite genesis in the southern Adelaide fold belt : implications from case studies at Victor Harbor and Monarto /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09SB/09sbc6639.pdf.
Full textAdams, Garry J. "Structural evolution and ore genesis of the granites gold deposits, Northern Territory /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09pha2128.pdf.
Full textIrving, Andrew John. "Neurotransmitter receptors and calcium homeostasis in cerebellar granule cells." Thesis, University of Bristol, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358503.
Full textBradley, Bernadette. "The granule-bound starch synthase genes of wheat." Thesis, Bradley, Bernadette (2003) The granule-bound starch synthase genes of wheat. PhD thesis, Murdoch University, 2003. https://researchrepository.murdoch.edu.au/id/eprint/442/.
Full textBradley, Bernadette. "The granule-bound starch synthase genes of wheat." Murdoch University, 2003. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040706.142601.
Full textIkingura, Justinian Rwezaula Carleton University Dissertation Geology. "Geology, geochemistry and genesis of stanniferous granites in the southern part of the Karagwe-Ankolean belt, NW Tanzania." Ottawa, 1989.
Find full textThomson, Travis Carle. "The role of TUDOR in «Drosophila» polar granule assembly and germ cell formation." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19231.
Full textLes cellules germinales sont des cellules souches, totipotentes, dans lesquelles se produit la méiose et qui sont nécessaires à la reproduction sexuelle et certains cas de reproduction asexuelle. Chez la drosophile, la formation des cellules germinales est liée à l'assemblage du cytoplasme germinal. Ce cytoplasme distinct contient des granules électron-denses appelées granules polaires. Les études présentées dans cette thèse examinent le rôle de TUDOR, un composant des granules polaires, au cours de l'assemblage des granules polaires et lors de la formation des cellules germinales. J'ai créé un allèle nul de tud qui m'a permis de déterminer que TUD est nécessaire à l'établissement des cellules germinales alors qu'il est partiellement dispensable à la formation de l'abdomen. Due à l'importance de TUDOR durant l'établissement des cellules germinales, j'ai d'isolé le complexe de protéines associées à TUDOR. J'ai comparé les protéines ainsi isolées à celles du complexe de VASA afin d'identifier des composants des granules polaires. J'ai ainsi étudié cinq protéines appartenant aux complexes de TUDOR et VASA soit TER94, AUBERGINE, Me31B, eIF4A et Pyruvate Kinase. La réduction de TUDOR ou de VASA en combinaison avec la réduction de TER94, Me31B, eIF4A ou AUBERGINE cause une baisse dans le nombre de cellules germinales formées. De plus, TER94, Me31B, eIF4A et AUBERGINE sont observés dans les granules polaires. Trois de ces composants soit Me31B, eIF4A et AUBERGINE sont des protéines également trouvées dans les « P-bodies », sites de métabolisme d'ARNm, ce qui suggère que les granules polaires sont un type de « Pbodies ». Des images de microscopie immuno-électronique de TER94, une protéine
Sasidharan, Nair Rajeev Kumar. "Fluid-absent melting of high-grade semi-pelites, P-T constraints on orthopyroxene formation and implications for granulite genesis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ59874.pdf.
Full textStock, Rachel E. "DNA binding activities in cerebellar granule cell neurons recognizing the promoter for the GABA(A)-alpha6 receptor subunit." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0822102-175859.
Full textRedhai, Siamak. "Genetic regulation of membrane trafficking, exosome secretion, growth and dense-core granule biogenesis in the Drosophila accessory gland." Thesis, University of Oxford, 2018. https://ora.ox.ac.uk/objects/uuid:4fc65fec-9434-48c4-af57-9905c9101df1.
Full textDuistermaat, Helena. "Monograph of Arctium L.(Asteraceae) : generic delimitation (uncluding Cousinia Cass. p. p.), revision of the species, pollen morphology, and hybrids /." Leiden : Rijksherbarium, Hortus botanicus, Leiden university, 1996. http://catalogue.bnf.fr/ark:/12148/cb37560427k.
Full textSant'Anna, Henrique Modanez de. "Entre reis, tiranos e generais : imitatio Alexandri e dispositivos táticos no ocidente helenístico, 323-255 a.C." reponame:Repositório Institucional da UnB, 2011. http://repositorio.unb.br/handle/10482/8525.
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A história política do mundo helenístico não era formada unicamente por comandantes sêniores do exército de Alexandre, o Grande; sob os Diádocos contava-se uma série de ex-oficiais de poder menor ou aventureiros que desempenhavam funções importantes em regiões controladas pelos ex-generais do rei macedônico ou mesmo em territórios que não haviam sido previamente subjugados. Juntamente com os Diádocos, tais comandantes de poder menor moldaram a política do mundo helenístico e transformaram de maneira relevante a sociedade na qual estavam inseridos, contribuindo para a formação da imitatio Alexandri e de seu impacto na arte da guerra do período helenístico. Este era o caso de Agátocles de Siracusa e, em seguida, Pirro do Epiro (com poder obviamente maior que o de Agátocles), que, a despeito das diferenças na esfera de poder e do vínculo com Alexandre, tiveram papel fundamental na concretização das inovações políticas e militares no ocidente helenístico. Esta tese de doutorado apresenta duas hipóteses: em primeiro lugar, que a monarquia de Agátocles era de natureza “helenística”, e que essa “inovação” política se dirigiu às suas tropas mercenárias e não à cidade de Siracusa, onde sua magistratura compulsória era uma simples formalidade; em segundo lugar, que a expedição africana de Agátocles e a experiência militar de Pirro na Magna Grécia e na Sicília provocaram inovações militares em Cartago, primeiramente em nível estratégico e, em seguida, já na invasão africana liderada pelos romanos, em nível tático. Tais inovações, por fim, teriam transformado o exército cartaginês numa autêntica arma helenística. _________________________________________________________________________________ ABSTRACT
The political history of the Hellenistic world was not composed only of the senior commanders of Alexander the Great; under the Diadochi both a number of his minor officers and adventurers played important roles. They were active both in territories ruled by former generals of Alexander and even in territories which had not been subdued by the Macedonian King. With the Diadochi, such commanders with minor power molded the politics of the Hellenistic world and shaped their society, thus contributing to the imitatio Alexandri as well as to its impact on the art of war in Hellenistic period. This was the case of Agathocles of Syracuse, and after him Pyrrhos of Epirus, both fundamental to the concretization of political and military innovations in the western Hellenistic world, despite their differences in power and their connection with Alexander. This DPhil thesis presents two hypotheses. First of all, Agathocles‟ monarchy was of “Hellenistic” nature, and such political “innovation” was proposed to his mercenary troops instead of the city of Syracuse, where his power was a mere formality. Secondly, the African expedition led by Agathocles and the military experience of Pyrrhos in Magna Graecia and Sicily fomented military innovations in Carthage. These innovations were, in the first place, at the logistical level, and after that, during the African invasion led by the Romans, at the tactical level. Such innovations, in the end, would have changed the Carthaginian army into an authentic Hellenistic weapon.
Kroeger, Benjamin Robert. "The genetic regulation and subcellular dynamics of secretory and endolysosomal organelles of Drosophila secondary cells." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:dce9ae14-b03d-4fca-8429-de839cc40d6a.
Full textCosta, Ana Monteiro. "A gênese do empresário gaúcho : uma interpretação a partir dos modelos de matriz institucional e de construção mental de Douglass North." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/30628.
Full textWithin development study purpose, this present research proposes to analyze the genesis of entrepreneur in Rio Grande do Sul under institutional perspective, more specifically following institutional matrix and mental construction models created by Douglass North. It is based in the theory of Schumpeter to characterize this entrepreneur as well as its role in the capitalist system. The first gaúchos entrepreneurs are Germanic immigrants or descendants and, unlike what happens in São Paulo, most of them are undercapitalized. Much of them also had capitalist functions, and it is assumed Pesavento's thesis that industrial capital is accumulated in commercial activity, primarily linked to the colonial economy. Thus, although the livestock-dry beef economy was the most profitable activity during the economic formation of the state, is not from it that that appears the capital and labor of industry neither the entrepreneur. To understand the traditional environment not auspicious to the emergence of the entrepreneur vis-à-vis modern capitalism, are used Weber and Veblen thesis on the development of societies, relating institutions with the paths followed. To the study of this dichotomy between traditional and modern institutions, are presented the analysis of Florestan Fernandes and Sergio Buarque de Holanda to Brazilian society. It is assumed that the cultural legacy of German immigrants (both Protestant ethic, and overcoming adversity) was one of the vectors to stimulate institutional matrix that allowed the emergence of the entrepreneur in the Rio Grande. Still, the domination of capital and labor discipline, as the alliance with the State and the constitution of a business class are the three other vectors of institutional matrix that forms in capitalist transition during the República Velha in the state. In the application of mental construction model are studied the biographies of some entrepreneurs from regional level where there is a differentiated behavior that seek to take advantage of economic opportunities in an attempt to show how the perception of the institutional environment of these actors is influenced by cultural heritage.
Rovira, Clusellas Meritxell. "Estrategias para la diferenciación in vitro de células ES de ratón a células acinares pancreáticas." Doctoral thesis, Universitat Pompeu Fabra, 2007. http://hdl.handle.net/10803/7104.
Full textLas células madre embrionarias (ES) de ratón han sido utilizadas en la última década para generar in vitro células completamente diferenciadas de varios linajes celulares. No obstante, la capacidad de las células ES a diferenciarse a tipos celulares de origen endodérmico es muy limitada. El objetivo principal de este proyecto ha consistido en desarrollar estrategias para diferenciar células ES de ratón a células pancreáticas acinares con una elevada eficiencia mediante 1) la optimización de las condiciones de cultivo con tal de activar vías de señalización implicadas en el desarrollo/diferenciación pancreáticas; 2) la sobreexpresión de factores transcripcionales maestros utilizando vectores virales con el fin de recapitular específicamente un programa de diferenciación acinar; 3) la selección genética de las células comprometidas al linaje acinar con el objetivo de purificar las células acinares diferenciadas.
Mediante la integración de estos abordajes, hemos conseguido aislar células que comparten características fenotípicas con células acinares inmaduras según la expresión de marcadores de diferenciación y la respuesta funcional a secretagogos.
Exocrine pancreatic diseases such as chronic pancreatitis (PC) or pancreatic cancer are major health issues in Europe. In CP, the acinar tissue is substituted by ductal complexes. In addition, it is difficult to maintain the differentiated phenotype of the acinar cells in culture as within few days an acinar-ductal transdifferentiation takes place.
In the last decade, mouse embryonic stem cells (mES) have been used to generate differentiated cells of a variety of cellular lineages in vitro. However, the ability of ES cells to differentiate into endodermal lineages is limited. The main objective of this project has focused on the development of strategies to differentiate mES to pancreatic acinar cells with high efficiency by means of: 1) Optimization of cell culture conditions to activate signalling pathways involved in pancreatic differentiation/development; 2) the overexpression of master transcription factors involved in pancreas development using viral vectors in order to recapitulate specific acinar differentiation program; 3) the genetic selection of cells committed to the acinar linage in order to purify the differentiated cells.
The integration of these different strategies allowed us to isolate cells that share phenotypic features with immature acinar cells according to the expression of differentiation markers and the functional response to acinar secretegogues.
Lounnas, Manon. "Diversité et invasions biologiques dans l'interaction grande douve du foie - Lymnaeidae : facteurs d'expansion de la fasciolose ?" Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTT055/document.
Full textGlobalization and the current global change have significant impacts on species distribution and community composition. When these species are involved in a host-parasite interaction, changes in species range distribution can result in the (re)emergence of infectious diseases. Fasciolosis, a disease caused by the liver flukes (Fasciola hepatica and Fasciola gigantica) is reemerging in many parts of the world. It is difficult to implement control programs because (1) the intermediate hosts, freshwater molluscs of the Lymnaeidae family, are composed by a group of cryptic species (2) several species involved in this system are invasive. The objective of this thesis was to study the ecological and evolutionary factors at a large scale in the interaction between the liver fluke and its intermediate hosts that might drive to fasciolosis (re)emergence. First, I developed molecular approaches to quickly identify cryptic species on the two liver flukes and on three Lymnaeidae species. Using one of these techniques, I identify the respective distribution of Galba schirazensis, Galba cubensis and Galba truncatula and infer their respective climatic envelope by ecological niche modelling. We then modelled and projected the potential species distribution ranges. We discussed the contribution of models to predict the species distribution in space and time giving a considerable advantage to control fasciolosis. I then study the genetic diversity structuration in invasive snails involved in the transmission of F. hepatica, using population genetics and phylogeny. I could infer colonization history, population dynamics and reproductive system of Pseudosuccinea columella, G. schirazensis and G. cubensis. I showed that these three species preferentially make inbreeding causing drastic losses of genetic diversity in the invasion front. However G. cubensis presents a coexistence of several genotypes in formerly colonized areas. Genetic differences between these three species are discussed in the light of what we know about their ecology. Overall, these results illustrate how dramatic the reduction in genetic diversity can be for hermaphrodite animals. Finally, we discuss the epidemiological risk related to the invasion by intermediate hosts depleted in genetic diversity. Indeed, a parasite might circulate easily in a clonal host population than in a polymorphic population. In my thesis I linked ecology, host-parasite interactions with genetics of the invasion to better understand the expansion of fasciolosis at a global scale
Peso, Fernández Marcos. "Conservation Planning of the Endangered Pyrenean frog by integratingnatural history, landscape and population genomics under Global Changes Scenarios." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/666635.
Full textLa rana pirenaica (Rana pyrenaica) es una especie endémica de los Pirineos, que se distribuye principalmente entre Navarra y Aragón, y habita en ríos de montaña. Ha sido catalogada por la IUCN como una especie en Peligro de Extinción, si bien se desconocen muchos aspectos de su biología, historia natural, así como el estado actual de sus poblaciones y distribución precisa. En esta tesis se ha realizado un trabajo de campo intenso que nos ha permitido recabar datos de distribución y densidad poblacional, genética, conectividad espacial y estado de las poblaciones de la rana pirenaica (Rana pyrenaica). En cuanto al estado de conservación, hemos incrementado el área de distribución conocida de esta especie con nuevas localidades, si bien varias poblaciones históricas han desaparecido por causas desconocidas. El tamaño poblacional estimado es bajo en muchas localidades, por lo que la probabilidad de extinción local es elevada. La rana pirenaica es muy homogénea genéticamente, tanto empleando genomas mitocondriales como con marcadores nucleares (SNPs), y ha sufrido un cuello de botella con posterior expansión geográfica desde la última glaciación. Las diferencias entre el núcleo oriental y occidental son mínimas en ADN mitocondrial, y ha existido un flujo genético reciente entre poblaciones a través del pre-Pirineo. En genes nucleares se observa una división poblacional durante el Holoceno en 5 o 6 núcleos genéticamente diferenciados. Los análisis de genética del paisaje sugieren que los principales ríos y desniveles pronunciados han actuado como barreras que permitieron esta diferenciación, y existe una separación efectiva entre el núcleo oriental y occidental de la especie. Se ha detectado la presencia masiva del hongo Batrachoquitrium dendrobatidis en todo el área de distribución de rana pirenaica, si bien su impacto en la especie es desconocido. Los modelos de clima futuro predicen que las condiciones de crecimiento del quítrido serán mejores en altitudes mayores bajo escenarios de cambio global, de forma que las poblaciones de altitud de muchas especies de anfibios se podrán ver afectadas. Los datos obtenidos confirman a rana pirenaica como en Peligro de Extinción. Se proponen una serie de medidas de gestión para la conservación in situ de la especie, así como unidades de gestión en toda el área de distribución. Este trabajo ha permitido identificar medidas de gestión de estas especies así como valorar su situación actual de conservación, las cuales esperamos que sirvan de ayuda a la gestión de la especie en Navarra y Aragón y especialmente en el Parque Nacional de Ordesa y Monte Perdido que es el único que alberga poblaciones de rana pirenaica.
Gonçalves, Felipe Aoki. "Padrões de diversidade genética e filogeografia de Tillandsia aeranthos (Lois.) L.B. Smith (Bromeliaceae)." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154740.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O continente sul-americano é o mais biodiverso da Terra, sendo palco da interação de complexos processos climáticos e geológicos que moldaram sua biota de forma muito heterogênea. Um crescente numero de estudos estudos de filogeografia de especies Sul Americanos tem auxiliado no entendimento das respostas evolutivas envolvidas em tal diversificação. A família Bromeliaceae é caracterizada por extensa radiação adaptativa, apresenta heterogeneidade de estratégias reprodutivas e padrões distintos de fluxo gênico e estrutura genética. Tillandsia aeranthos (Lois.) L.B. Smith é uma bromeliácea epífita que habita matas ciliares por toda região dos Pampas. Sua ocorrência em densas populações ao longo de ambientes geograficamente distintos a torna um bom modelo para a estudos sobre a influência de fatores geoclimáticos e ecológicos no padrão de distribuição da variabilidade genética e decorrentes processos de especiação ou manutenção da integridade da espécie. Esta dissertação foi dividida em dois manuscritos a fim de fornecer dados e análises úteis para a compreensão da evolução desta espécie neotropical. No Capítulo 1 foi realizada a amplificação heteróloga em Tillandsia aeranthos e Tillandsia recurvata de marcadores microssatélites nucleares previamente desenvolvidos para outras espécies de Bromeliaceae. Conjuntos de sete e seis marcadores apresentaram índices satisfatórios de polimorfismos em T. aeranthos e T. recurvata, respectivamente. A análise dos dados em duas populações de 20 indivíduos de cada espécie apresentou resultados compatíveis com sistemas reprodutivos distintos de cada espécie: fecundação cruzada predominante em T. aeranthos e auto-fecundação predominante em T. recurvata. No Capítulo 2 investigamos os padrões de variabilidade e estrutura genética e sistema reprodutivo de Tillandsia aeranthos ao longo da distribuição geográfica da espécie. Um total de 203 indivíduos de 13 localidades foi analisado a partir de sete marcadores microssatélites nucleares; 12 indivíduos tiveram 13 regiões universais plastidiais sequenciadas; e 74 indivíduos com 543 flores foram submetidos a experimentos de polinização manual. Os dados de microssatélites nucleares apontam altos níveis de diversidade genética em T. aeranthos (HE=0,806; HO=0,745) apesar de todas as regiões plastidiais sequenciadas terem sido monomórficas, sem diferenciação haplotípica. Foi observada também baixa diferenciação populacional (FST=0,031) sem correlação significativa entre as distâncias genéticas e geográficas das populações (isolamento-por-distância). Sinais moderados de eventos recentes de gargalo genético foram detectados em somente quatro das 13 populações, indicando que a maior parte das populações apresentou estabilidade demográfica durante o último máximo glacial. Os experimentos de manipulação polínica evidenciaram auto-incompatibilidade total em T. aeranthos. Em conclusão, os resultados demonstram altos níveis de diversidade genética e estabilidade demográfica na espécie, com fluxo gênico ocorrendo sem barreiras geográficas evidentes dentro da área de ocorrência de Tillandsia aeranthos.
South America is the most biodiverse subcontinent of the planet, bearing interactions between complex geoclimatic processes that heterogeneously molded its biota. An increasing number of Phylographic studies in South American species have helped us to understand the evolutionary responses that gradually formed such great biodiversity. Bromeliaceae is a family of herbaceous plants characterized by extreme adaptive radiation, its species present a wide range of reproductive strategies and distinct patterns of gene flow and genetic structure. Tillandsia aeranhos (Lois.) L.B. Smith is an epiphyte that inhabits mainly riparian forests of the Pampas biome. It occurs in dense populations across distinct habitats and topographic profiles, which makes it a good model species in studies about the influence of geo-climatic and ecologic factors over patterns of genetic variability and structure, as well as subsequent evolutionary processes of speciation or species cohesion maintenance. This dissertation presents two manuscripts aiming to provide data and analysis that will allow a better comprehension of T. aeranthos evolutionary history. In Chapter 1, we performed cross-amplifications of several nuclear microsatellite loci developed for other bromeliad species in Tillandsia aeranthos and T. recurvata. Sets of seven and six markers amplified satisfactorily and were polymorphic in T. aeanthos an T. recurvata respectively. The following analysis were carried in two populations of 20 individuals for each species and results were in accordance to opposite breeding sytems of each species: predominant cross-pollination in T. aeranthos and predominant self-pollination in T. recurvata. In Chapter 2, we investigated patterns of genetic diversity, phylogeographic structure and breeding system in T. aeranthos across most of its geographic distribution. Altogether, 203 individuals were analyzed from seven microsatellite markers; 12 individuals were analyzed from 13 chloroplast regions; and controlled pollinatin experiments were carried in 74 individuals bearing 543 flowers. Nuclear microsatellite data suggests very high levels of genetic diversity (HE=0,806; HO=0,74). Contrastingly, all chloroplast regions were monomorphic, with no haplotype differentiation. Genetic structure was very low (FST=0,031)) and isolation-by-distance hypothesis was refuted. Moderated signs of recent bottleneck events were detected in four out of 13 populations, suggesting that most populations were demographically stable since the last glacial maximum. Controlled pollination experiments showed complete self-incompatibility in T. aeranthos. In conclusion, our results sow high levels of genetic diversity and demographic stability in the species, with gene flow occurring freely without evidence of geographic barriers across the species geographic distribution.
FAPESP: 2016/03777-4
FAPESP: 2014/15586-6
Ziede, Mariangela Kraemer Lenz. "A construção da função dos tutores no âmbito do curso de graduação em pedagogia : licenciatura na modalidade a distância da Faculdade de Educação - Universidade Federal do Rio Grande do Sul." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/16186.
Full textThis research, whose main objective is to examine the construction of the function of tutor within the Graduate Course of Pedagogy in the distance mode of the Federal University of Rio Grande do Sul (PEAD, in Portuguese) is a case study and follow the model of qualitative research. The data analysis was based on the genetic epistemology of Piaget, seeking for the way how Become Awareness (Consciousness) takes place. For the analysis of the data, it was operated with the levels of Consciousness in three categories: technology ownership, strategies of intervention in areas of tutorial and understanding of the changes proposed by the course. The analysis was conducted from a survey of the registers of the tutors in environments of the course. With this study it was possible to conclude that from interactions with the teachers-students 2and with studies in the specialization course, tutors were forming the awareness of the very same function of tutorial, which resulted in changes in their ways to understand the proposal of the course, the teachers-students and the technologies, qualifying, therefore the pedagogical work.
Dornelles, Rodrigo Ciconet. "Ciência, coletas e extrações : uma etnografia a partir de um laboratório de genética de populações." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/76221.
Full textThis dissertation is the result of an intense immersion in one of the most intimate spaces of the scientific practice: the laboratory. The goal brought was to conduct an ethnographic research in a laboratory in population genetics, linked to the Instituto de Biociências, of Departamento de Genética and to Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM) at the Universidade Federal do Rio Grande do Sul (UFRGS). The object of this study was not to research the laboratory itself, but the scientific practices undertaken by this collective as being part of the Consortium for Analysis of Diversity and Evolution in Latin America (CANDELA), a multi-center research consortium, as its name implies, sought to account for the racial-ethnic diversity in several countries in Latin America. It tries to give an account of what happened, especially among instruments and laboratory practice, within this research consortium, tackling the everyday practical and conceptual scientific choices ocurred during the over six months of fieldwork research. It intends to not lose sight of the broader associations that were established in this context, so that the laboratory was the starting point and not the ending point. In this sense, what took place is what is called here an “ethnography from the laboratory”. In a theoretical-epistemological scheme, the proposal is to discuss traditional dichotomies of modern science, such as culture and nature, from ethnographic study of a research project that was on the border between natural sciences and social sciences, contributing to expanding the discussion on the agency of nonhumans and how this is done in an ethnographic research that takes seriously not only what is said by our human counterparts, but also those that emerge from these talks and from the observation of scientific practice. Moreover, while this dissertation seeks to show the centrality of non-human in scientific practice mainly through an event that occurred over the fieldwork, it points to the possibility of dialogue between the natural sciences and the social sciences.
Peixoto, Analissa Scherer. "Aprendizagem num contexto de educação a distância : impactos na formação de professores." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26298.
Full textThis search investigates the impacts of the proposal theoretical and methodological aspects of interdisciplinary Development and Learning under de Focus of Psychology II on the reconstruction process and decision of conscience and awareness of concepts of students’s learning in Degree in Pedagogy – distance mode, from UFRGS. It is a case study and follows a model of qualitative research through case study. The analysis was based on Piaget’s Genetic Epistemology, searching for the way in which the Consciousness proceeds regarding the construction of the conception of learning. The search was performed with a group of eight teachers, students, buildind on the records of activicties undertaken by them in interdisciplinary Development and Learning under the Focus of Psychology II , whose posts have been made in virtual learning environments used in the actual course. The survey results indicate that the Development of the activicties had proposed more open and flexible, allowing individuals to position themselves from their personal livings to get greater impacts in process for building conceptual insofar as possible the effective articulation linkage between theory and practice. There was also observed that the problematizing interventions proposed by teachers and tutors were significant to the process of reflection and conceptual reconstruction in that it helps the student to reflect on his/her ideas, contextualizing him/her in the piagetion theoretical framework discussed in interdisciplinary.
Ameli, Mostafa. "Heuristic Methods for Calculating Dynamic Traffic Assignment Simulation-based dynamic traffic assignment: meta-heuristic solution methods with parallel computing Non-unicity of day-to-day multimodal user equilibrium: the network design history effect Improving traffic network performance with road banning strategy: a simulation approach comparing user equilibrium and system optimum." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSET009.
Full textTransport systems are dynamically characterized not only by nonlinear interactions between the different components but also by feedback loops between the state of the network and the decisions of users. In particular, network congestion affects both the distribution of local demand by modifying route choices and overall multimodal demand. Depending on the conditions of the network, they may decide to change for example their transportation mode. Several equilibria can be defined for transportation systems. The user equilibrium corresponds to the situation where each user is allowed to behave selfishly and to minimize his own travel costs. The system optimum corresponds to a situation where the total transport cost of all the users is minimum. In this context, the study aims to calculate route flow patterns in a network considering different equilibrium conditions and study the network equilibrium in a dynamic setting. The study focuses on traffic models capable of representing large-scale urban traffic dynamics. Three main issues are addressed. First, fast heuristic and meta-heuristic methods are developed to determine equilibria with different types of traffic patterns. Secondly, the existence and uniqueness of user equilibria is studied. When there is no uniqueness, the relationship between multiple equilibria is examined. Moreover, the impact of network history is analyzed. Thirdly, a new approach is developed to analyze the network equilibrium as a function of the level of demand. This approach compares user and system optimums and aims to design control strategies in order to move the user equilibrium situation towards the system optimum
Pluckhahn, D. "The Palmer Granite: geochronology, geochemistry and genesis." Thesis, 1993. http://hdl.handle.net/2440/87543.
Full textVarious igneous bodies have intruded the Palmer area throughout the Delamerian Orogeny. The earliest, the Rathjen Gneiss, intruded either before or during D1 which gave it the prominent foliation. D1 was also responsible for crenulations in migmatite veins throughout the area. These crenelated migmatite veins are in areas folded by D2 mesoscale folds. Some pegmatite veins are also folded by D2 folds. The Palmer Granite intruded during D2 as is seen by shearing in a semi-crystalline state and a tectonic foliation that has been folded. The ballooning of the granite during emplacement deforms the surrounding sediments and the pre-granite folds hence their axes lie parallel to the contact of the granite. The effect of the granite intruding during the deformation has lead to the axis of the D2 folds forming after the granite to have a degree of randomness about their axis. Migmatite grade was reached again after the intrusion of the granite causing melt veins to develop to disrupt the foliation. D3 formed a regional syncline of the area combined with some small scale folding within the granite, however a foliation did not form. The emplacement of the granite and some other igneous bodies throughout the area has been controlled by using the bedding plane of the Kanmantoo. The geochemical trends throughout the Palmer Granite is formed by two different groups fractionally crystallising zircon, amphibole and biotite. This results in a decrease of normally incompatible elements. The two groups form by one group from a homogeneous source and the other a heterogeneous source. The xenoliths crystallised from a mafic magma. The amphibolites form two groups according to their differentiation and genetic relationship. They both form by fractional crystallisation however U and Pb are decreasing cannot be explained by this. Another possible mechanism is liquid un-mixing. To tie all of the groups together a model of a mafic pluton that crystallises the xenoliths as a chilled margin. The mafic magma evolves some of the Palmer Granite whilst turbulently convecting hence homogenising the magma. A magma recharge forms the more evolved mafic and this forms more Palmer Granite which convects in a laminar fashion forming heterogeneities. Part of the mafics evolve enough to be caught up in the Palmer Granite and as it does not crystallise zircons all the fractional crystallisation of the Palmer Granite must have occurred in the mafic plution.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 1993
McDonald, G. D. "The petrology and timing of the Anabama Granite and associated igneous activity, Olary Region, SA." Thesis, 1992. http://hdl.handle.net/2440/122489.
Full textTwo ideologies of thought exist when models of granite genesis are considered. Do they represent the products of direct fractionation of a basaltic mantle melt, or, do they form in accordance with the restite model of White and Chappell (1977)? Assimilation and fractional crystallization (AFC) modelling of Nd - and Sr - isotopic data from the Anabama Granite, of this study, and data from the granites of the southern Adelaide Fold Belt, Antarctica and the Lachlan Fold Belt of New South Wales, all of approximately the same age, appears to reflect mixed sources with components derived both from an average Delamerian basalt composition and an average Archean crust composition. Results indicate that the Anabama Granite mostly represents primitive Delamerian basalt, contaminated by 12- 14 % Archean crustal material. Field relationships of the Anabama Granite indicate that it was the site of multiple magmatic intrusions, between approximately 490- 425 Ma. These intrusions are represented by several episodes of hydrothermal alteration and crosscutting dykes. A long-lived thermal source, not represented in the southern Adelaide Fold Belt, may be responsible for this ongoing magmatic activity. Examples of these dykes are the lamprophyre dyke, dated at 457 ± 18 Ma, which is similar in composition and appearance to the lamprophyres near Truro (South Australia) and the dacite porphyry dyke which crosscuts all other lithologies and was dated at 425 ± 13Ma. This age corresponds to the onset of thermal activity in the Lachlan Fold Belt, and therefore, leads to the suggestion that the region where the Anabama Granite outcrops may represent the western margin of the thermal perturbation responsible for the production of granitic melts in the Lachlan Fold Belt at around 400 Ma. Differences in source regions for the Anabama Granite, the granites of Antarctica and those of the Lachlan Fold Belt are recognized by the different Nd- and Sr - isotopic ratios, although all granites may represent the same process of formation, that being AFC. The dacite porphyry's isotopic signature indicates a more primitive source than that suggested for the Anabama Granite, and therefore its genesis does not represent a remelting of the Anabama Granite or of its source region. Geochemically, the Anabama Granite is similar to the Reedy Creek Granodiorite of the southern Adelaide Fold Belt and the Wanda Granodiorite of western Victoria. It can also be classified as an I-type granite using the criteria established by Chappell and White (1974). Geophysical gravity modelling of the Anabama Granite was carried out and it was found that the granite extends to a depth of approximately 15 km and dips uniformly to the north west. Thus giving an indication that fracture propagation, rather than plutonism, is the mechanism of granitic melt transport through the upper crust for the Anabama Granite and granites of the southern Adelaide Fold Belt.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1992
Gower, David Patrick. "Geology and genesis of uranium mineralization in subaerial felsic volcanic rocks of the Byers Brook formation and the comagatic [sic] Hart Lake Granite, Wentworth area, Cobequid Highlands, Nova Scotia /." 1988. http://collections.mun.ca/u?/theses,124296.
Full textLamb, William Marion. "Metamorphic fluids and granulite genesis." 1987. http://catalog.hathitrust.org/api/volumes/oclc/17156182.html.
Full textTypescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
Ferris, Kathleen Gray. "The Genetics of Adaptation to a Harsh Granite Outcrop Environment in Mimulus." Diss., 2014. http://hdl.handle.net/10161/8646.
Full textClosely related populations or species often occupy ecologically disparate habitats. Adaptation to new habitats can maintain genetic variation within a species or eventually lead to speciation. Local adaptation to different environments has been repeatedly demonstrated in plants and animals, however the traits and genes that underlie this adaptation are poorly understood. This is because many traits differ between divergent populations and species. One way to solve this problem is to separate a trait from its genetic background through genetic manipulation and look for differences in fitness between genetically manipulated individuals.
My dissertation focuses on investigating the traits and genes that allow two species of Monkey flower, Mimulus laciniatus and Mimulus filicifolius, to survive in a unique habitat. Most closely related Mimulus species, such as M. guttatus, occur in streams and seeps, but M. laciniatus and M. filicifolius have each colonized a harsh granite outcrop environment. Another unique characteristic that both these species share is a lobed leaf shape. Because of the physiological properties of lobed leaves they should be adaptive in a dry, exposed granite outcrop. M. laciniatus also flowers earlier than nearby M. guttatus and is a small flowered self-fertilizing species while M. guttatus has large flowers and is highly outcrossing. Early flowering allows plants to escape the onset of seasonal drought while a self-fertilizing mating system and small flower size is often correlated with the occupation of harsh habitats.
In chapter one I describe a new granite outcrop endemic species of Mimulus, M. filicifolius based on morphological divergence from M. laciniatus. M. filicifolius was previously categorized as M. laciniatus but it is geographically disjunct and its leaves are more finely dissected (Sexton, Ferris, and Schoenig 2013). In the second chapter I explore whether M. filicifolius is genetically divergent and reproductively isolated from M. laciniatus using genetic sequence, microsattelite, and hybrid fertility data from four members of the M. guttatus species complex with highly overlapping geographic ranges: M. guttatus, M. nasutus, M. lacinaitus, and M. filicifolius. In the third chapter I investigate the genetic basis of leaf shape differences in three members of the M. guttatus species complex, M. laciniatus, M. nudatus, and M. guttatus using bulk segregant analysis to map quantitative trait loci. In the fourth and final chapter I examine the genetic basis of flowering time, floral size, and leaf shape divergence between sympatric M. guttatus and M. laciniatus populations in a common garden using quantitative trait locus (QTL) mapping, phenotypic selection on flowering time, flower size, and leaf shape in M. laciniatus x M. guttatus hybrids in a reciprocal transplant experiment in the field, and whether QTL's from my common garden experiment overlap fitness QTL's in the field by genotyping hybrid individuals that survived to flower in the field.
Dissertation
Adams, Garry J. (Garry John). "Structural evolution and ore genesis of the granites gold deposits, Northern Territory / by Garry John Adams." 1997. http://hdl.handle.net/2440/19158.
Full textv, 242 leaves, [19] leaves of plates : ill. (chiefly col.), map ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
The Granites gold deposits of The Granites-Tanami Inlier are the principal interest of the thesis.
Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics, 1998
Adams, Garry J. (Garry John). "Structural evolution and ore genesis of the granites gold deposits, Northern Territory / by Garry John Adams." Thesis, 1997. http://hdl.handle.net/2440/19158.
Full textv, 242 leaves, [19] leaves of plates : ill. (chiefly col.), map ; 30 cm.
The Granites gold deposits of The Granites-Tanami Inlier are the principal interest of the thesis.
Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics, 1998
Tomkins, Andrew George. "Evolution of the granulite-hosted Challenger gold deposit, South Australia : implications for ore genesis." Phd thesis, 2002. http://hdl.handle.net/1885/146024.
Full textGonzalez, Bryan Jose. "HNF1A Deficiency Impairs Beta-cell Fate, Granule Maturation and Function." Thesis, 2019. https://doi.org/10.7916/d8-d6v3-ca52.
Full textLaFavers, Kaice Arminda. "A forward genetic approach to identifying novel calcium regulators in Toxoplasma Gondii." Diss., 2017. http://hdl.handle.net/1805/14781.
Full textToxoplasma gondii is an obligate intracellular eukaryotic pathogen that causes severe neurologic disease in immunocompromised adults and congenitally infected neonates. Events critical to the propagation of T. gondii, such as invasion and egress, are regulated by calcium-dependent signaling. In order to identify unique components of the parasite’s calcium signaling networks, members of the Arrizabalaga laboratory have used a forward genetics approach to isolate mutants with altered sensitivity to the calcium ionophore A23187. Exposing extracellular parasites to A23187 induces protein secretion, motility and cytoskeletal rearrangements and prolonged treatment causes exhaustion of factors required for invasion, which results in what is referred to as ionophore induced death (iiDeath). Mutants capable of surviving this treatment were isolated from a chemically mutagenized population. Whole genome sequencing of one such mutant, MBD2.1, identified a nonsense mutation in a protein of unknown function (TGGT1_069070, ToxoDBv7.2) Complementation of MBD 2.1 with a wild-type copy of TGGT1_069070 restored sensitivity to iiDeath treatment. Endogenous tagging of this locus revealed that the encoded protein is secreted from a unique parasite secretory organelle known as the dense granule into the parasitophorous vacuole, leading to its designation as TgGRA41. Complete knockout of TgGRA41 recapitulates the resistance to iiDeath observed in MBD2.1 but also exhibits a dramatic decrease in propagation in tissue culture not seen in the original mutant. The knockout shows defects in multiple steps of the lytic including compromised invasion efficiency and premature egress of parasites from host cells. Cytosolic calcium measurements of extracellular parasites show enhanced uptake of calcium in the knockout strain as compared to parental and complemented, suggesting that the loss of TgGra41 results in calcium dysregulation. Together, these results provide a novel insight into the role that the parasitophorous vacuole of T. gondii plays in calcium homeostasis and calcium-dependent signaling processes.
Kostana, Ziemowit. "Forcing-theoretic framework for the Fraïssé theory." Doctoral thesis, 2021. https://depotuw.ceon.pl/handle/item/4002.
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