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Etchplana o dinamica e episódica nos trópicos quentes e úmidos
Antonio Carlos Vitte
Revista do Departamento de Geografia , 2005, DOI: 10.7154/rdg.v0i16.49
Abstract: O artigo apresenta a teoria da etchplana o como um referencial teórico e metodológico para os estudos das formas de relevo nas regi es tropicais quentes e úmidas, destacando o papel do intemperismo químico e dos sistemas de transforma o da cobertura pedológica. A originalidade da teoria da etchplana o é que ela considera os processos geoquímicos e pedogenéticos como os principais mecanismos da morfogênese e do aplainamento das formas de relevo. Neste trabalho s o discutidos a gênese da teoria da etchplana o, o intemperismo químico como mecanismo básico do aplainamento das formas de relevo e uma proposta de trabalho com a etchplana o.
AS INFLUêNCIAS DA FILOSOFIA NATURAL E DA NATURPHILOSOPHIE NA CONSTITUI O DO DARWINISMO: ELEMENTOS PARA UMA FILOSOFIA DA GEOGRAFIA FíSICA MODERNA
Antonio Carlos Vitte
Boletim Goiano de Geografia , 2009,
Abstract: Esse trabalho argumenta que a teoria da evolu o de Charles Darwin sofreu forte influência da naturphilosophie de Schelling e Hegel, representando um avan o positivo nas concep es de teleologia da natureza. Fortemente influenciado pelas obras de Alexander von Humboldt, de Werner e pelas pesquisas no campo da paleontologia, a Teoria da Evolu o, concebeu a transforma o dos organismos e a sua especia o a partir determinantes geográficos e temporais. Ideologicamente influenciado por Lyell, que acreditava na hipótese da vera causa, Darwin relegou a matriz espacial e concentrou suas argumenta es nas mudan as temporais, basicamente climáticas, como determinante da evolu o. Os impactos da teoria da evolu o atingem tanto o campo da geografia física, quanto da geografia humana, influenciando fortemente na postura metodológica das pesquisas geográficas, mas chamando a aten o para a complexidade das rela es entre o espa o e tempo que est o em constante mudan a.
A GEOMORFOLOGIA GEOGRáFICA ENQUANTO PRODUTO DAS RELA ES ENTRE A ESTéTICA E A METAFíSICA DA MATéRIA
Ant?nio Carlos Vitte
Boletim Goiano de Geografia , 2009,
Abstract: Esse trabalho argumenta que a geomorfologia geográfica é o produto de um complexo intercruzamento entre as descobertas da história da Terra e as transforma es filosóficas sobre a natureza e a arte. A uni o das descobertas e dos avan os na ciência newtoniana com a pintura de paisagem, fundamentadas em uma concep o de espa o, permitiram a representa o do relevo e, a partir dele, as investiga es sobre a geologia e as forma es estratigráficas. O maior impulso para o surgimento da geomorfologia geográfica foi dado pelas reflex es sobre a morfologia desenvolvidas por Goethe, que influenciou os wenerianos e a descoberta dos processos formadores do relevo.
Breves considera es sobre o papel de Pierre Monbeig na forma o do pensamento geomorfológico uspiano Brèves considérations sur le r le de Pierre Monbeig dans l'élaboration de la pensée géomorphologique uspiana Brief observations on Pierres Monbeig's role on the formation of uspian geomorphological thought
Antonio Carlos Vitte
Confins , 2011, DOI: 10.4000/confins.6954
Abstract: Esse trabalho argumenta que o pensamento geomorfológico uspiano desenvolveu-se a partir das reflex es de Pierre Monbeig. Nesse processo, a no o de complexo geográfico, definido a partir de uma rela o entre a Cultura e a Natureza ao longo da história material da sociedade, permitiu compreender o relevo como arquitetura necessária ao desenvolvimento da história territorial de uma regi o. A influência direta desse postulado é a obra de Aziz Nacib Ab’Saber, onde se organiza a geomorfologia geográfica uspiana e que marcará a interpreta o do relevo brasileiro, em termos de recursos analíticos, epistêmicos e metodológicos Cet article soutient que la pensée géomorphologique uspiana s'est développé à partir des réflexions de Pierre Monbeig. Dans ce processus, la notion de complexe géographique, défini comme une relation entre culture et nature au long de l'histoire matérielle de la société, a permis de comprendre le relief comme une architecture nécessaires au développement de l'histoire territoriale d'une région. L'influence directe de ce postulat est l' uvre de Aziz Nacib Ab'Saber, qui organise la géomorphologie géographique uspiana et qui marque l'interprétation du relief brésilien en termes de ressources analytiques, épistémologiques et méthodologiques This paper argues that the geomorphological uspian thought was developed from the ideas of Pierre Monbeig. In this process, the notion of geographical complex, defined as a relationship between culture and nature through the material history of society, made it possible to understand relief as the necessary architecture for the development of territorial history of a region. The direct influence of this postulate is the work of Aziz Nacib Ab'Saber, where he organizes the uspian geographical geomorphology and which mark the brazilian interpretation of the relief in terms of analytical resources, epistemic, and methodological.
Gest?o do desenvolvimento econ?mico local: algumas considera??es
Vitte, Claudete de Castro Silva;
Intera??es (Campo Grande) , 2006, DOI: 10.1590/S1518-70122006000200009
Abstract: this paper objectifies to argue some limits and scopes of the local economic development strategies to local management. the paper intends to contextualize the emergence of the thematic in central countries; it shows how the theme is incorporated in politic agend in brazil, it points out one of the most importants analytical perspectives in geography for the theme's compreension that is the space's valorization and it suggests a methodological model for studies of local economic development management.
Recursos naturais e produ o de commodities: geoeconomia e políticas regionais de coopera o em seguran a alimentar na América do Sul
Claudete de Castro Silva Vitte
Revista Brasileira de Desenvolvimento Regional , 2013, DOI: 10.7867/2317-5443.2013v1n1p065-083
Abstract: The main objective of this study is to contribute to debates on trans-scale approaches, understood as an interpretative instrument of processes of capitalism development in their territorial dimension, considering the scale of transnational and supranational regionalism, from the geopolitics and geo-economics of natural resources. Resources are those involving agricultural production, land and water. Food security is considered strategic in the context of increased demand and limits on production. The thesis defended here is that, with regard to food security and essential resources for their security, land and water for food production in quantity and quality, one can see in South America a very preliminary movement to incorporate the topic on the political agenda, i.e. the theme is gaining relevance in national policies and the regional scenario as there is an increase in this debate at conferences and seminars, and an increase in specific discussions within regional organizations such as MERCOSUR and UNASUR, in hemispheric organizations such as the OAS, and in multilateral organizations such as the FAO.
Intracellular delivery of peptides via association with ubiquitin or SUMO-1 coupled to protein transduction domains
Anne-Laure Vitte, Pierre Jalinot
BMC Biotechnology , 2008, DOI: 10.1186/1472-6750-8-24
Abstract: Several bacterial expression vectors have been constructed to produce modular proteins containing from the N- to the C-terminus: the FLAG epitope, a cleavage site for a protease, a PTD, human ubiquitin or SUMO-1, and either GFP or the HA epitope. Nine different PTDs were tested, including the Tat basic domain, wild type or with various mutations, and stretches of arginine or lysine. It was observed that some of these PTDs, mainly the Tat PTD and seven or nine residues long polyarginine motifs, caused association of the hybrid proteins with cells, but none of these constructs were delivered to the cytosol. This conclusion was derived from biochemical and immunofluorescence studies, and also from the fact that free cargo protein resulting from cleavage by proteases after ubiquitin or SUMO-1 was never observed. However, in agreement with our previous observations, mutation of the diglycine motif into alanine-arginine, as in the SHP constructs, allows cytosol entry demonstrated by immunofluorescence observations on living cells and by cell fractionation analyses. This process results from a non-endocytic pathway.Our observations indicate that fusion of SUMO-1 to a peptide-PTD module allows generation of a stable hybrid protein that is easily produced in bacteria and which efficiently enters into cells but this property necessitates mutation of the diglycine motif at the end of SUMO-1, thereby impairing delivery of the peptide alone.The rapid progress in the understanding of protein networks underlying biological functions, as well as of the specific roles played by particular polypeptides in human pathologies such as cancer, has fuelled the search for means to deliver peptides or proteins into cells within a therapeutic perspective. Exciting developments originated from previous studies on the viral transactivator Tat, as well as the antennapedia transcription factor [1-3]. Characterization of the capacity of these proteins to enter cells led to the mapping of peptidic
LTR retrotransposons in rice (Oryza sativa, L.): recent burst amplifications followed by rapid DNA loss
Clémentine Vitte, Olivier Panaud, Hadi Quesneville
BMC Genomics , 2007, DOI: 10.1186/1471-2164-8-218
Abstract: Using a new method to estimate the insertion date of both truncated and complete copies, we estimated these two forces more accurately than previous studies based on other methods. We show that LTR retrotransposons have undergone bursts of amplification within the past 5 My. These bursts vary both in date and copy number among families, revealing that each family has a particular amplification history. The number of solo LTR varies among families and seems to correlate with LTR size, suggesting that solo LTR formation is a family-dependent process. The deletion rate estimate leads to the prediction that the half-life of LTR retrotransposon sequences evolving neutrally is about 19 My in rice, suggesting that other processes than the formation of small deletions are prevalent in rice DNA removal.Our work provides insights into the dynamics of LTR retrotransposons in the rice genome. We show that transposable element families have distinct amplification patterns, and that the turn-over of LTR retrotransposons sequences is rapid in the rice genome.Transposable elements (TEs) make up a large part of eukaryotic genomes. They represent a genomic fraction of 3% in baker's yeast [1], ~20% in fruit fly [2-5], 45% in human [6,7] and over 80% in maize [8,9]. Due to their repetitive nature and to the fact that they harbor regulatory signals, TEs are responsible for chromosomal rearrangements [10], fragmental gene movements [11,12] and for the evolution of gene regulation and function [13,14]. Hence, the activity of TEs is currently considered to be one of the major processes in genome evolution.In plants, Long Terminal Repeat (LTR) retrotransposons are the most common type of TE: they are ubiquitous in the plant kingdom [15] and are the main constituents of large plant genomes [15,16]. Moreover, these elements have been shown to be responsible for wide genome expansions [8,9,17-21] and are considered to be major players in the remarkable variation of genome size observed in flow
Da cosmologia à geografia: o curso de geografia física de Imannuel Kant e a constru??o metafísica da superfície da terra
Ribas, Alexandre Domingues;Vitte, Antonio Carlos;
Sociedade & Natureza , 2009, DOI: 10.1590/S1982-45132009000300002
Abstract: the present article argues that the course of physical geography of imannuel kant is the product of a philosophical and rise cosmological reflection from the problem in if establish the nature regularity differentiated and regulated by mechanical and causal foundations. starting from philosophical problems related the thesis developed in the criticism of the pure reason, of the criticisms come upon of naturalists and about its concept universally conception of nature and of space, kant is grateful to review its philosophical position, that only will happen starting from a profound examine of the metaphysics concepts, matter, space and nature. the space, now, not ideal, proceeds being a organize category of the empiric world that is cognoscible, where the geography is qualified as the space science, starting from a metaphysical reflection about nature and the earth rising this way, the bases for a geography philosophy in the modernity.
A ciência humboltiana e a gênese da Geografia física moderna
Antonio Carlos Vitte,Kalina Salaib Springer
Geografares , 2009,
Abstract: O trabalho argumenta que a geografia física surgiu a partir das reflex es e postulados da ci-ência humboldtiana. Essa formada no contexto da naturphilosophie e no desenvolvimento de novos instrumentos e avan os das ciências exatas, permitindo a constru o de um modelo de natureza e superfície da terra baseado no princípio transcendental das leis universais da natureza, materializadas em princípios regionais.
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