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Pinheiro, Hudson T., Shepherd, Bart, Teixeira, João Batista, Pimentel, Caio R., Pereira, Pedro Henrique C., Stein, Carlos E., Reis-Filho, José Amorim, Garla, Ricardo C., Macieira, Raphael M., Delfino, Stephanie D.T., Giarrizzo, Tommaso, Joyeux, Jean-Christophe, Gasparini, João Luiz, Rocha, Luiz A. (2021): Fish aggregations and reproductive behaviour on mesophotic coral ecosystems of a southwestern Atlantic Oceanic archipelago. Journal of Natural History 55 (31-32): 2017-2025, DOI: 10.1080/00222933.2021.1985645

Oceanic islands and seamounts play an important role on the origin and maintenance of biodiversity, however, these environments are still poorly understood. Here we report 15 new records of reef fish species for the Davis Seamount, Trindade Island and Martin Vaz Archipelago, in the Vitoria-Trindade Chain (VTC). Such isolated sites are among the last frontier for shallow reef exploration in the South Atlantic, and more scientific effort is needed to better understand their biogeography and to help in conservation efforts.

Submitted by Ricardo Carrasco (ricardogc84@uepb.edu.br) on 2019-09-24T17:52:27Z No. of bitstreams: 1 TESE - JOÃO BATISTA TEIXEIRA.pdf: 1156937 bytes, checksum: 1312ad856132e3bfb82b161634de3f5b (MD5) Approved for entry into archive by João Costa (joaocosta@uepb.edu.br) on 2019-10-08T18:57:35Z (GMT) No. of bitstreams: 1 TESE - JOÃO BATISTA TEIXEIRA.pdf: 1156937 bytes, checksum: 1312ad856132e3bfb82b161634de3f5b (MD5) Made available in DSpace on 2019-10-08T18:57:35Z (GMT). No. of bitstreams: 1 TESE - JOÃO BATISTA TEIXEIRA.pdf: 1156937 bytes, checksum: 1312ad856132e3bfb82b161634de3f5b (MD5) Previous issue date: 2019-06-26 This research discusses and problematizes the situations through which a considerable part of the population of Mozambique passed between the years of 1974/1980, a period that includes the end of Portuguese colonization and the establishment of the Marxist-Leninist Regime in the Government of Samora Moisés Machel after independence. The situations referred to relate to the so-called Cleaning Operation. The action took place in the independent government that tried to remove from Mozambican society those who fell into the categories of unemployed, healers, régulos, Jehovah's Witnesses, women, prostitutes, people who could practice the vices of the colonial period or needed "re-education" to enter the new time in Mozambique. The operation known as "cleaning" or "Operation production" was a practice and a difficult moment in the recent Republic of Mozambique, which created the so-called reeducation fields, where people were sent out of society and banished to this state-projected space. The fictional work of Mozambicans, João Paulo Borges Coelho, Campo de Trânsito (2007) and Between Silent Memories (2013), by Ungulani Ba Ka Khosa, are representations that allow investigating the modus operandus in Mozambican society, from what the postcolonial government called Operation Cleaning and Operation Production. The thesis is based on the Postcolonial Theory and some slopes derived from it, investigate in the fiction of Borges Coelho and Ba Ka Khosa, as it was given the representation of the events mentioned such operation and from review and bibliographical survey, research in newspapers of the time and reports of survivors. The cleaning operation in Mozambique was a breakup of this society and that these camps not only faced Mozambique as a decolonizing nation, but also the civil rights of hundreds of Mozambicans who had their lives interrupted, abducted and violated. The questions that pervade the Postcolonial and the newly liberated nations, whose liberation and freedom do not reach all, and which many, because they do not share the same opinion or are suspected of opposing the current regime of a people, freedom does not reach everyone and many because they do not have the same opinion or at least suspect opponents of the current regime. The use of the banishment to camps full of violence, barbarism and imposition of a single order and thought represents the lack of a citizen policy, respecting freedom of thought. Esta pesquisa discute e problematiza as situações pelas quais passou uma parcela considerável da população de Moçambique entre os anos de 1974/1980, período que compreende o fim da colonização portuguesa e implantação do Regime Marxista-leninista no Governo de Samora Moisés Machel, após a independência. As situações as quais referidas dizem respeito à chamada Operação limpeza. A ação se efetivou no governo independente que tentou retirar da sociedade moçambicana aqueles que se enquadraram nas categorias de desocupados, curandeiros, régulos, Testemunhas de Jeová, mulheres, prostitutas, pessoas que poderiam praticar os vícios do período colonial ou precisassem de ―reeducação‖ para adentrar no novo tempo em Moçambique. A operação denominada de ―limpeza‖ ou ―Operação produção‖, foi uma prática e um momento difícil na recente República de Moçambique, que criou os campos ditos de reeducação, para onde enviavam as pessoas retiradas da sociedade e banidas para esse espaço projetado pelo Estado. A obra ficcional dos moçambicanos, João Paulo Borges Coelho, Campo de Trânsito (2007) e Entre Memórias Silenciadas (2013), de Ungulani Ba Ka Khosa, encontram-se representações que permitem investigar o modus operandus na sociedade moçambicana, a partir daquilo que o governo pós-colonial denominou de Operação limpeza e Operação produção. A tese se socorre da Teoria Pós-colonial e algumas vertentes dela derivadas, investigar na ficção de Borges Coelho e Ba Ka Khosa, como se deu a representação dos eventos mencionados, tal operação e a partir de revisão e levantamento bibliográfico, pesquisa em jornais da época e relatos dos sobreviventes. A Operação limpeza em Moçambique, foi um momento de cisão dessa sociedade e que os tais campos não só afrontaram o Moçambique enquanto nação que se descolonizava, como os direitos civis de centenas de moçambicanos que tiveram suas vidas interrompidas, sequestradas e violadas. Objetivamos visibilizar e incetar sobre o debate as questões que permeiam o Pós-colonial e as nações recém-libertas, que cuja libertação e liberdade não chega a todos e pelo fato de muitos não terem a mesma opinião ou serem suspeitos de oposição ao regime vigente de um povo. O recurso do banimento para campos cheios de violência, barbárie e imposição de uma única ordem e pensamento representa a falta de uma política cidadã, respeitando a liberdade de pensamento.

O Regime Diferenciado de Contratações (RDC) foi introduzido no ordenamento jurídico brasileiro em função da realização dos jogos da Copa do Mundo de 2014, sediada no País e dos Jogos Olímpicos 2106, sediada pela cidade do Rio de Janeiro e que posteriormente foram editadas novas legislações, permitindo a utilização do instrumento por outros seguimentos para além da finalidade inicial da norma, lhe tirando o caráter de transitoriedade. No sentido de contratações públicas, fez-se um estudo da importância do processo licitatório para a Administração Pública, na busca da proposta mais vantajosa, à luz do sigilo orçamentário trazido pelo novo diploma legal. O trabalho teve seu foco em processos licitatórios, utilizando o RDC para seleção e contratação no âmbito da Universidade Federal do Tocantins (UFT). The Differentiated Regime of Contracting (RDC) was introduced in the Brazilian legal system due to the realization of the matches of the 2014 World Cup, based in the country and Olympic Games 2106, headquartered in the city of Rio de Janeiro and later, were published new legislation allowing the use Of the instrument for other purposes beyond the original purpose of the standard, taking away the character of transience. In the sense of public contracts, a study is made of the importance of the bidding process for Public Administration in the search for the most advantageous proposal in light of the budgetary secrecy brought by the new legal diploma. The work had its focus on bidding processes using the RDC for selection and contracting within the scope of the Federal University of Tocantins (UFT).

O Objetivo deste trabalho foi estudar como a distribuição geográfica das redes bancárias a partir da dinâmica específica da financeirização - a bancarização, da economia na Aglomeração Urbana do Sul em governos distintos de 1994-2010 incidiu sobre o território. Foi estudado como a bancarização do território e da sociedade a partir da movimentação de ativos de créditos e depósitos denotaram dois momentos distintos na história recente do Brasil: uma década neoliberal e outra considerada "inclusiva". Neste ínterim foram selecionados os bancos públicos como agentes de atuação do Estado no sistema financeiro, através da concentração bancária nas praças financeiras estabelecidas, no cenário investigado aponta a importância dos bancos públicos em amortecer os efeitos da crise mundial de 2008. A consolidação bancária nos municípios de Pelotas e Rio Grande denota o dinamismo econômico da década em questão, ambas as cidades cresceram mais de 12% em média do PIB naquele período. A estabilidade territorial para a disputa dos bancos públicos com os agentes privados levou a uma forma de atuação na qual as políticas públicas são levadas aos municípios menos desenvolvidos como Arroio do Padre, Capão do Leão e São José do Norte através dos bancos públicos como o Banco do Brasil, a Caixa Econômica Federal e o Banrisul. Foi estabelecido banco de dados no decorrer desta investigação referentes à Produto interno Bruto, Índice de gini diminuiu regionalmente, a renda per capita aumentou, o índice de desenvolvimento humano municipal indicou regionalmente um acréscimo da qualidade de vida comparando os anos 1994-2002 aos 2003-2010, o número de estabelecimentos, empregos no setor, de agências e de movimentação de crédito e depósitos por bancos. Estes índices fazem parte do banco de dados que permitiram a investigação aqui apresentada. The objective of this work was to study how the geographical distribution of banking networks from the specific dynamics of financialization - the bancarization, of the economy in the Aglomeração Urbana do Sul in different governments from 1994-2010 focused on the territory. It was studied how the bancarization of the territory and the society from the movement of assets of credits and deposits denoted two distinct moments in the recent history of Brazil: a decade neoliberal and another considered "inclusive". In the meantime, public banks were selected as State agents in the financial system, through banking concentration in established financial centers. In the scenario investigated, it points out the importance of public banks in cushioning the effects of the 2008 global crisis. Bank consolidation in municipalities of Pelotas and Rio Grande denotes the economic dynamism of the decade in question, both cities grew more than 12% on average GDP in that period. The territorial stability for the dispute between public banks and private agents has led to a form of action in which public policies are taken to less developed municipalities such as Arroio do Padre, Capão do Leão and São José do Norte through public banks such as the Banco do Brasil, Caixa Econômica Federal and Banrisul. It was established database during this investigation concerning Gross Domestic Product, Gini Index declined regionally, per capita income increased, the municipal human development index regionally indicated an increase in quality of life comparing the years 1994-2002 to 2003- 2010, the number of establishments, jobs in the sector, agencies and the movement of credit and deposits by banks. These indexes are part of the database that allowed the research presented here.

No século XXI, a reestruturação econômica nacional possibilita que uma área do Bairro Getúlio Vargas (BGV), situado em Rio Grande (RS), faça parte do processo de expansão portuária. A área apresenta um importante número de famílias chefiadas por mulheres, assim o artigo objetiva refletir sobre questões referentes à cidadania, as políticas públicas e a chefia de família feminina na área de expansão, a partir de uma reflexão sobre cidadania e os planos nacionais de políticas para as mulheres.

Submitted by Deise Lorena Araújo (deiselorena@uepb.edu.br) on 2016-08-26T18:57:10Z No. of bitstreams: 1 PDF - João Batista Teixeira.pdf: 814026 bytes, checksum: 10f46660e4ff17827324a7dfc9ba4643 (MD5) Approved for entry into archive by Irenilda Medeiros (nildamedeiros@uepb.edu.br) on 2016-09-02T14:04:52Z (GMT) No. of bitstreams: 1 PDF - João Batista Teixeira.pdf: 814026 bytes, checksum: 10f46660e4ff17827324a7dfc9ba4643 (MD5) Made available in DSpace on 2016-09-02T14:04:52Z (GMT). No. of bitstreams: 1 PDF - João Batista Teixeira.pdf: 814026 bytes, checksum: 10f46660e4ff17827324a7dfc9ba4643 (MD5) Previous issue date: 2012-05-17 Universidade Estadual da Paraíba We Will investigate in this work the processes of alterities and identities that occur in characters in the works O outro pé da Sereia(2006) and Antes de nascer o mundo by Mia Couto, beyond the memory forgetfulness on the crossing on which these characters represent the everyday life in Mozambique in towns, villages and cities. The alterity and culture on which these texts are inscribed indicate the differences that constitute the social life which is a permanent source of tension and conflict. Based on this guidance, we forward the analyses on the referring works, discussing such opinions from the postcolonial theory with the studies of Bonnic (2000), Hall (2006) and Bhabha (2003) on cultural identity and diaspora; Canclini (2007) and Ortiz (2000) on issues such as globalization and internationalization. Regarding to questions of alterity and poetics of relation, Glissant (2005) emphasizes the fact that mankind cannot lead the world and therefore be instinctively led to conceive the world with others, at the same position which for the author means one of the first conditions of the relation poetics In memory we associate our discussions with Le Goff (1996) , Seligmann (2003) and Ecléa Bosi (1994), and the author who discuss the Portuguese-speaking African literature: Afonso (2004), Abdala Júnior (2003) Tânia Macedo (2007), Rita Chaves (2008), Bezerra (2007), Duarte (2010), among other ones. Thus, the analyses of this study lead us to understanding of literary universe of Mia Couto’s work and its relation with the world that fits in each conception of territories and diluted borders. Investigaremos nesse trabalho os processos de alteridades e identidades que ocorrem nas personagens das obras O outro pé da sereia (2006) e Antes de nascer o mundo (2009), de Mia Couto, além da memória e o esquecimento nas travessias em que esses mesmos personagens retratam o cotidiano de Moçambique, das vilas, aldeias e cidades. A alteridade e a cultura em que esses textos se inscrevem apontam para a diferença, que constituem a vida social que é fonte permanente de tensão e conflito. Com base nessas orientações, encaminhamos as análises nas obras referidas discutindo tais posicionamentos a partir da teoria pós-colonial com os estudos de Bonnic (2000); Hall (2006) e Bhabha (2003) sobre identidade cultural e diáspora; Canclini (2007) e Ortiz (2000), em questões como globalização e mundialização. No que diz respeito às questões de alteridade e poética da relação, Glissant (2005) enfatiza o fato do homem não conseguir conduzir o mundo e, por isso, ser instintivamente levado a se conceber no mundo com os outros, no mesmo nível que os outros, o que para o autor, significa uma das primeiras condições da poética da relação. Na memória associamos nossas discussões à Le Goff (1996), Seligmann (2003) e Ecléa Bosi (1994), e nos autores que discutem as literaturas africanas de língua portuguesa: Afonso (2004), Abdala Júnior (2003) Tânia Macedo (2007) Rita Chaves (2008), Bezerra (2007), Duarte (2010), entre outros. Assim, as análises desse trabalho nos levam a compreensão do universo literário da obra de Mia Couto e sua relação com um mundo que se inscreve a cada numa concepção de territórios e fronteiras diluídas.

Foram realizados três experimentos individuais com o objetivo de testar diferentes meios de cultura e combinações entre os fitorreguladores BAP e ANA na multiplicação de clones de Eucalyptus grandis x E. urophylla, utilizando o biorreator de imersão temporária RITA®. O meio de cultura MS e a frequência de imersão a cada 2 h promoveram maior massa fresca e número de brotos por explantes. No entanto, houve diferença quanto ao crescimento das culturas entre os dois clones avaliados. A combinação 1,0 µM de BAP com 0,5 µM de ANA foi a que resultou maiores médias em relação à massa fresca e ao número de brotos. As culturas apresentaram alto percentual de hiper-hidricidade, sendo essa desordem fator limitante nas condições deste estudo para o cultivo de Eucalyptus em biorreatores. Three individual experiments were conducted in order to test different culture media and BAP/NAA combinations on the multiplication of Eucalyptus grandis x E. urophylla clones using the temporary immersion bioreactor RITA®. The MS medium and the frequency of immersion every two hours promoted the highest fresh weight and number of shoots per explant. However, cultures growth were different between the two clones evaluated. The combination of 1.0 µM BAP and 0.5 µM NAA promoted the greatest means in relation to fresh weight and number of shoots. The cultures presented high percentages of hyperhydricity and this physiological disorder was a limiting factor in the condition of this study Eucalyptus cultivation in bioreactors.

The goal of this project was to evaluate the embryogenic callus induction of two Coffea arabica clones selected for their characteristics of rust resistance and high yield, as well as to compare their multiplication in two different media under both solid and liquid cultivation conditions. The protocol described by Teixeira et al. (2004) was used for callus induction in a randomized block design in which each clone was considered a treatment. Evaluation of callus induction was carried out 180 days after initiation by counting embryogenic calli. For callus multiplication, the treatments consisted of two different media [stage two of Albarran et al. (2004) and the multiplication medium described by Teixeira et al. (2004)] and two cultivation systems (solid and liquid). Evaluations were conducted by weighing calli 21, 42 and 63 days after initiation of the experiment. The two studied clones exhibited the same potential for embryogenic callus induction. The potential for embryogenic callus multiplication was influenced by the plant’s genotype. When compared with the liquid system, the solid system displayed the highest level of embryogenic callus multiplication for the clones studied.

O presente trabalho teve como objetivo a análise da emissão da fluorescência da clorofila a e dos teores de clorofilas em plantas de Ananas comosus (L. Merril) cv pérola, cultivadas em casa de vegetação, submetidas a quatro concentrações de nitrogênio por adição ou não de sulfato de amônio, de acordo com os seguintes tratamentos: Tº= 0 T1/2 = 15; T1 = 30; e T2 = 60 mg/kg solo. As determinações de fluorescência mínima (F0), máxima (Fm), variável (Fv), terminal (Ft) e da eficiência fotoquímica máxima (Fv/Fm) de folhas adaptadas ao escuro foram realizadas ao longo do dia, aos cinco dias após a segunda aplicação de sulfato de amônio, efetuada 120 dias após o transplantio. A adição de sulfato de amônio afetou a fluorescência variável e a máxima, mas não afetou a fluorescência mínima, a terminal nem a eficiência fotoquímica. Houve diferenças significativas entre os valores das variáveis da fluorescência ao longo do dia em que foram feitas as leituras. Houve diferenças nos teores de clorofilas foliares, em função das concentrações de sulfato de amônio aplicadas, com aumento para clorofila a e para a relação clorofila a/b, mas não para clorofila b. The present research aimed to analyze chlorophyll a fluorescence emission as well as chlorophyll levels in Ananas comosus (L. Merril) cv Pérola grown under greenhouse conditions and submitted to four concentration of nitrogen, through addition or not of ammonium sulphate according to the following treatments: Tº= 0.000; T1/2 = 0.015; T1 =0.030; and T2 = 0.060 g/kg soil. Determinations of minimum (F0), maximum (Fm), variable (Fv), and terminal (Ft) fluorescence and maximum photochemical efficiency (Fv/Fm) of dark-adapted leaves were carried out during the day, five days after the second application of ammonium sulphate, carried out 120 days after the transplant. The results showed that the addition of ammonium sulphate affected variable and maximum fluorescence, but not minimum and terminal fluorescence neither the photochemical efficiency. There were significant alterations in relation to the time of the day in which the fluorescence was read. Differences in leaf chlorophyll concentration were significant among treatments in relation to variations of ammonium sulphate concentration, with increase for chlorophyll a, total and to the ratio chlorophyll a/b, but not for chlorophyll b.

p. 71 - 83 Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-10T19:18:01Z No. of bitstreams: 1 0895981110000416-main.pdf: 2060599 bytes, checksum: f1ab9079c334ca980deb2aa5bbb75add (MD5) Made available in DSpace on 2012-01-10T19:18:01Z (GMT). No. of bitstreams: 1 0895981110000416-main.pdf: 2060599 bytes, checksum: f1ab9079c334ca980deb2aa5bbb75add (MD5) Previous issue date: 2010 This paper aims at establishing a tectonic and temporal framework to characterize the metallogenic processes that contributed to the origin of the mineral provinces in the northern São Francisco Craton. Many Archean mineralizations (eg. massive sulfide zinc, lead, zinc and copper, besides magnesiteetalc, ironetitaniumevanadium, iron, chromite and manganese) were generated before the assembly of the Craton. Deposits of chromite, nickel, gold and emerald were produced during the Paleoproterozoic orogenic cycle, when the Craton was amalgamated into the Atlantica paleocontinent. An extension event is recorded in the Neoproterozoic, during the breakup of Rodinia, associated with deposits of phosphorite and uranium. Kimberlite diamond and gold mineralization were generated during the Brasiliano orogenic cycle, coeval with the amalgamation of West Gondwana. A long-lasting and rather uniform crustal stress is recorded in the area during the Cambrian period. Resetting of the isotopic and magnetic systems that affected the Neoproterozoic sediments of the Irecê Basin at about 520 Ma was attributed to the regional-scale fluid migration and mineralization in the aftermath of the Brasiliano orogenic cycle.

texto completo: acesso restrito. p. 143–167 Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2014-03-11T13:54:17Z No. of bitstreams: 1 1-s2.0-S0009254106004232-main.pdf: 3815885 bytes, checksum: f5996941265d84fcc0220d7671aa8c16 (MD5) Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2014-09-09T16:05:28Z (GMT) No. of bitstreams: 1 1-s2.0-S0009254106004232-main.pdf: 3815885 bytes, checksum: f5996941265d84fcc0220d7671aa8c16 (MD5) Made available in DSpace on 2014-09-09T16:05:28Z (GMT). No. of bitstreams: 1 1-s2.0-S0009254106004232-main.pdf: 3815885 bytes, checksum: f5996941265d84fcc0220d7671aa8c16 (MD5) Previous issue date: 2007 The Neoproterozoic successions of South America largely accumulated during extensional events associated with the breakup of Rodinia. These units are preserved as thick carbonate and siliciclastic strata in epicontinental seaways and shallow marine environments on passive cratonal margins, which have been intensely deformed in mobile belts surrounding the craton. Volcaniclastic and siliciclastic materials are associated with some of the marginal fold belts. Three mega-sequences are represented in the cratonal area: glaciogenic, carbonate and molasse. At least two transgressive-regressive sea level cycles occurred during the evolution of the carbonate mega-sequence, which lies above iron-cemented glacio-marine diamictite of probable Sturtian age. We report high resolution carbon, oxygen, strontium and sulfur isotope trends from analyses of well-preserved sample sets and use principally strontium and carbon isotopes from the best preserved samples in concert with lithostratigraphic and biostratigraphic observations to provide detailed correlations of the South American Neoproterozoic successions. Lead–zinc deposits, some of which with important metal reserves seem to be restricted to the Sturtian carbonate succession and associated with a sequence boundary at the end of the first transgressive–regressive cycle. Phosphate deposits are found in both Sturtian and Varangerian/Marinoan carbonate successions, above glaciogenic sequences.

p.454–467 Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-13T12:37:15Z No. of bitstreams: 1 S1342937X06002887-main.pdf: 3181224 bytes, checksum: 66518f0d6dc4d0b74381d6e875ce97aa (MD5) Made available in DSpace on 2012-01-13T12:37:15Z (GMT). No. of bitstreams: 1 S1342937X06002887-main.pdf: 3181224 bytes, checksum: 66518f0d6dc4d0b74381d6e875ce97aa (MD5) Previous issue date: 2007 The Curaçá terrane is part of the Itabuna–Salvador–Curaçá (I–S–C) Paleoproterozoic orogen in the São Francisco craton, northeastern Brazil, and comprises supracrustal rocks, gneisses of their probable basement, amphibolites, and mafic-ultramafic Cu-bearing bodies (including the Caraíba Cu-Mine), all affected by D1-D3 deformation events associated to M1-M3 metamorphism under high-T granulite and amphibolite facies, and assisted by G1-G3 tonalitic-granodioritic-granitic intrusions. U–Pb and Sm–Nd Thermal Ionization Mass Spectrometry (TIMS) isotopic data from amphibolite, tonalite, and granite, sampled in a well-known outcrop, indicate partial reset and heterogeneous modification of the original isotopic systems, attributable to deformation and metamorphism. The ages obtained from these systems agree with each other, and also with other previously published U–Pb data, and imply that 2.6 Ga is the crystallization age of the protolith of the amphibolite. Together with key structural relationships, they also indicate a 2.08–2.05 Ga interval for M3 metamorphism, and make even a less precise age (2.2–2.3 Ga) acceptable, as it suggests contamination in the amphibolite with material in a syn-D2 tonalite crystallized 2248±36 Ma ago. The new data demonstrate the existence of Neoarchean fragments of both oceanic and continental crusts and constrain the Archean-Paleoproterozoic development of the Curaçá belt, the I–S–C orogen, and the São Francisco craton.

p.346–361 Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-13T12:32:35Z No. of bitstreams: 1 S1342937X06001985-main.pdf: 2869794 bytes, checksum: 3ceabc4f60938ee86c2d118b04156918 (MD5) Made available in DSpace on 2012-01-13T12:32:35Z (GMT). No. of bitstreams: 1 S1342937X06001985-main.pdf: 2869794 bytes, checksum: 3ceabc4f60938ee86c2d118b04156918 (MD5) Previous issue date: 2007 The cratonic blocks of South America have been accreted from 2.2 to 1.9 Ga, and all of these blocks have been previously involved in the assembly and breakup of the Paleoproterozoic Atlantica, the Mesoproterozoic to Neoproterozoic Rodinia, and the Neoproterozoic to Phanerozoic West Gondwana continents. Several mineralization phases have sequentially taken place during Atlantica evolution, involving Au, U, Cr, W, and Sn. During Rodinia assembly and breakup and Gondwana formation, the crust-dominated metallogenic processes have been overriding, responsible for several mineral deposits, including Au, Pd, Sn, Ni, Cu, Zn, Mn, Fe, Pb, U, P2O5, Ta, W, Li, Be and precious stones. During Rodinia breakup, epicontinental carbonate-siliciclastic basins were deposited, which host important non-ferrous base metal deposits of Cu–Co and Pb–Zn–Ag in Africa and South America. Isotope Pb–Pb analyses of sulfides from the non-ferrous deposits unambiguously indicate an upper crustal source for the metals. A genetic model for these deposits involves extensional faults driving the circulation of hydrothermal mineralizing fluids from the Archean/Paleoproterozoic basement to the Neoproterozoic sedimentary cover. These relations demonstrate the individuality of metal associations of every sediment-hosted Neoproterozoic base-metal deposit of West Gondwana has been highly influenced by the mineralogical and chemical composition of the underlying igneous and metaigneous rocks.

p. 263–304 Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-26T15:59:26Z No. of bitstreams: 1 S016913680500020X-main.pdf: 2085935 bytes, checksum: ca02adfba2f94589150a37f9ca97e874 (MD5) Made available in DSpace on 2012-01-26T15:59:26Z (GMT). No. of bitstreams: 1 S016913680500020X-main.pdf: 2085935 bytes, checksum: ca02adfba2f94589150a37f9ca97e874 (MD5) Previous issue date: 2005 The Proterozoic sediment-hosted Zn–(Pb) sulfide and non-sulfide deposits of the São Francisco Craton, Brazil, are partially syn-diagenetic and epigenetic and were probably formed during extensional events. The majority of the deposits occur within shallow water dolomites. The Pb isotopic data of sulfides are relatively homogeneous for individual deposits and plot above the upper crust evolution curve of the Plumbotectonic model. Some of the deposits are characterized by highly radiogenic lead (206Pb/204Pb ≥ 21) originating from the highly radioactive crust of the São Francisco Craton. Pb and S isotopic data suggest the sources of metal and sulfur for the deposits to be the basement rocks and seawater sulfates in the sediments, respectively. The relatively high temperatures of formation (100 to 250 °C) and moderate salinity (3% to 20% NaCl equiv.) of the primary fluid inclusions in the sphalerite crystals suggest the participation of basinal mineralizing fluids in ore formation. The steep paleo-geothermal gradient generated by the radioactively enriched basement rocks probably assisted in heating up the circulating mineralizing fluids.

Os objetivos deste trabalho foram avaliar a viabilidade de embriões de buriti (Mauritia flexuosa L.) pelo teste de tetrazólio e cultivo in vitro, o tratamento térmico na quebra de dormência das sementes, e o efeito do armazenamento em duas temperaturas na conservação das sementes. A viabilidade de embriões de sementes recém-colhidas foi condizente com os resultados de germinação de embriões in vitro, com valores superiores a 90%. O estudo da quebra de dormência foi feito com tratamento das sementes em temperaturas de 30, 35 e 40ºC por períodos de 15, 30 e 45 dias. Até 15 e 30 dias, os resultados obtidos foram maiores que os do controle. Sementes armazenadas em saco de plástico por um período de quatro meses e meio, sob temperatura de 20ºC, apresentaram resultados de germinação de embrião superiores a 90%, e sob temperatura de 30ºC houve perda total da viabilidade. The present work was conducted to evaluate the viability of embryos of Mauritia flexuosa L. by tetrazolium test and in vitro culture, high temperature treatment on dormancy breaking, and the effect of storage at different temperatures on seed conservation. The viability of newly harvested embryos presented a high correlation with the rate of embryo germination in vitro. The rate of viability was higher than 90% either when evaluated by the tetrazolium method or by in vitro embryo culture. Dormancy breaking of seeds was tested by treating the seeds under temperatures of 30, 35 and 40ºC for 15, 30, and 45 days. Great variation was observed among treatments, but, at least on day 15 and on day 30, the germination was higher than in the control. Seeds stored in plastic bags for four and a half months and temperature of 20ºC presented a germination rate higher than 90% while in the seeds stored at 30ºC the viability was zero.

Texto completo: acesso restrito. p. 332-344 Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-01-03T15:46:23Z No. of bitstreams: 1 Guimaraes.pdf: 646638 bytes, checksum: a665577ed3929e32f8d7f90a99f89657 (MD5) Made available in DSpace on 2013-01-03T15:46:23Z (GMT). No. of bitstreams: 1 Guimaraes.pdf: 646638 bytes, checksum: a665577ed3929e32f8d7f90a99f89657 (MD5) Previous issue date: 2001 Gold deposits in the Serra de Jacobina region in Bahia, northeastern Brazil, occur in a belt of siliciclastic metasedimentary rocks intercalated with mafic and ultramafic rocks, and underlain by a tonalite–trondhjemite–granodiorite gneiss-dominated (TTG) basement. The siliciclastic sequence probably represents the remnants of a sedimentary basin, which formed in an Archean passive margin-type setting. The basin was subsequently subjected to a complex history of deformation, metamorphism, and hydrothermal activity, as a result of oblique collisional events in Late Archean and Paleoproterozoic. The majority of the auriferous occurrences in the area are hosted by quartz-pebble conglomerates, and have been noted to resemble placer-type deposits. However, structurally-controlled hydrothermal orebodies, and the formation of gold occurrences also in quartzites and mafic and ultramafic rocks, support an epigenetic model for the mineralizing event. Gold mineralization is interpreted to be an integral part of the late (~1.9 Ga) tectonothermal evolution of the Serra de Jacobina region. It was roughly coeval with the emplacement of large volumes of post-collisional type, peraluminous granitic magmas, during a regional strike-slip regime.