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Search Results: 1 - 10 of 58613 matches for " Estefan Monteiro da Fonseca "
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ESTUDO GEOAMBIENTAL DAS CONCENTRA ES DE HIDROCARBONETOS DE PETRóLEO (POLICíCLICOS AROMáTICOS – HPAs) AO LONGO DO RIO ESTRELA, BAíA DE GUANABARA – RJ
Carlos Marclei Arruda Rangel,José Ant?nio Baptista Neto,Estefan Monteiro da Fonseca
Revista Tamoios , 2013,
Abstract: RESUMO Neste estudo, análises geoquímicas de dez amostras de sedimentos coletados ao longo do sistema fluvial do Rio Estrela, localizado ao norte da Baía de Guanabara, evidenciam a presen a de impactos antropogênicos nesta área. As concentra es de hidrocarbonetos policíclicos aromáticos (HPAs) obtidas mostraram-se ligeiramente elevadas, quando comparadas com valores encontrados em ambientes naturais. Os HPAs foram analisados nos sedimentos ao longo da bacia do Rio Estrela. Embora as concentra es destes compostos detectados nesta área tenham ocorrido em baixas propor es, os tipos de HPAs detectados com alto peso molecular, s o mutagênicos e carcinogênicos. Por esta raz o, compreender a dinamica de transporte, deposi o e riscos ambientais dos HPAs para o sistema ecológico, especialmente para o sistema aquático, s o importantes formas de monitoramento deste ambiente. Palavras chaves: Rio Estrela, Baía de Guanabara, Polui o, HPAs ABSTRACT In this study, the geochemical analysis of ten sediments samples collected along the fluvial system of the Estrela River, located in the northern portion of Guanabara Bay, shows the presence of anthropogenic impacts in this area. Concentrations of polycyclic aromatic hydrocarbons (PAHs) obtained were slightly higher when compared with values found in natural environments. The PAHs were tested in sediments along the drainage basin of Estrela River. Although the compounds found in this area have occurred in low proportions, PAHs compounds detected, with high molecular weight, are mutagenic and carcinogenic. For these reason, understanding PAHs transport, fate and environmental risk to ecological system, especially for aquatic ecosystem, are important forms of monitor this environment. Keywords: Estrela River, Guanabara Bay, Pollution, PAHs
Distribui??o sedimentar da Lagoa Rodrigo de Freitas através de sísmica de alta resolu??o
Baptista Neto, José Ant?nio;Silva, Cleverson Guizan;Dias, Gilberto Tavares de Macedo;Fonseca, Estefan Monteiro da;
Revista Brasileira de Geofísica , 2011, DOI: 10.1590/S0102-261X2011000100013
Abstract: the rodrigo de freitas lagoon (rio de janeiro state) sediments and bottom characteristics were analyzed using high-resolution (10 khz) sub-bottom profiles associated with particle size analyses of 44 bottom sediment samples. four types of echo-characters were identified revealing the strong relation with the particle size distribution and bottom morphology. in areas of acoustic penetration, the basement delineates buried sugar-loaf hills and infilled-valley features. the total sediment thickness can reach as much as 16 meters along the paleovalleys, which are aligned in a ne-sw direction, parallel to the regional basement orientation observed on the coastal massifs. there is a predominance of organic rich muddy sediments, infilling the paleovalleys which are the main sites of shallow gas occurrences within the lagoonal sediments.
Heráclito e Protágoras: o Logos do Jogo e o Jogo do Logos
Marcos Aurélio Monteiro da Fonseca
Princípios : Revista de Filosofia , 1996,
Abstract:
A FILOSOFIA ROUSSEAUNIANA E SUA INFLUêNCIA PARA A TEORIZA O DO PODER CONSTITUINTE
Ilana Alcantara Monteiro da Fonseca,Rafael Jubette Pinheiro
Fides : Revista de Filosofia do Direito, do Estado e da Sociedade , 2010,
Abstract: é assente na doutrina que o Poder Constituinte sempre existiu. Todavia, a elabora o de uma teoria que legitimasse a existência do Poder Constituinte só teve início no século XVIII, a partir do livro Que é o Terceiro Estado? escrito por Sieyès. Entretanto, a partir dos estudos empreendidos por Rousseau que resultaram na obra Do Contrato Social notam-se inúmeros aspectos da teoriza o do Poder Constituinte realizada por Sieyès. Neste trabalho, iremos expor características da filosofia rousseauniana, a evolu o do Poder Constituinte e, ainda, faremos uma breve análise Do Contrato Social e a influência que este exerceu na teoriza o do Poder Constituinte.
The Microstructure and Properties of Copper with Ceria Nanoparticles Addition  [PDF]
Daniela Passarelo Moura da Fonseca, Waldemar Alfredo Monteiro
Journal of Materials Science and Chemical Engineering (MSCE) , 2019, DOI: 10.4236/msce.2019.710004
Abstract: Copper-based composites strengthened by ceria nanoparticles were processed by conventional powder metallurgy: mixing (30 min and 46 rpm), compaction (cold, uniaxial, 1080 MPa for 10 s) and sintering (800°C for 6 h in vacuum atmosphere of 105 torr). It was studied the microstructure (optical microscopy, scanning electron microscopy), X-ray diffraction with Rietveld refinement and some properties (electrical conductivity, Vickers hardness and fracture analysis) of the compositions 92 wt% Cu - 8 wt% CeO2 and 80 wt% Cu - 20 wt% CeO2. The results showed uniform phase distribution, low porosity and ceria disperse inside copper grain. In despite of properties, the composites had electrical conductivity of 38% IACS and 15% IACS and hardness of 69 and 88 HV5, respectively. The results of 92 wt% Cu - 8 wt% CeO2 composites were promising, and they are in according with actual literature.
Estimation of secondary production of the Faro/Anc?o artificial reefs
Moura, Ana;Fonseca, Luis Cancela da;Boaventura, Diana;Santos, Miguel Neves;Monteiro, Carlos Costa;
Brazilian Journal of Oceanography , 2011,
Abstract: the secondary productivity of reef epifauna is one of the least investigated aspects in artificial reef research. during the first 12 months after the deployment of the faro/anc?o (algarve, portugal) artificial reef, we assessed the effect of substratum orientation on the secondary production of epibenthos, using the boysen-jensen method. whenever the method could not be applied, secondary production was estimated by the p/b ratio. the results showed that the epibenthic production was higher on the horizontal surface throughout the study. however, at the end of the study period, the mean production showed similar values. the horizontally oriented surfaces showed a mean production between 128 and 103 g m-2 yr-1, while at the vertical surfaces the mean production varied between 103 and 98 g m-2 yr-1. furthermore, the mean annual production was extrapolated for all the algarve artificial reef complex,and we concluded that after one year of deployment theses artificial reefs were able to generate around 5 mt of epibenthic fauna.
Distribui??o de Leptopharsa heveae em seringal no Estado de S?o Paulo
Cividanes, Francisco Jorge;Fonseca, Fernando da Silva;Santos, Terezinha Monteiro dos;
Pesquisa Agropecuária Brasileira , 2004, DOI: 10.1590/S0100-204X2004001000015
Abstract: the objective of this work was to determine the within-plant and seasonal distributions of leptopharsa heveae drake & poor, 1935 (hemiptera: tingidae) in rubber tree, hevea brasiliensis müell arg., located in pindorama, sp. the sampling was carried out considering leaves of internal and external parts of branches located in the upper, medium and lower sections of the north and south sides of rubber trees. the highest density of nymphs was observed from march to may and from october to november, the same occurring in adults from march to july and during november. the similar distribution of l. heveae on the different parts of the rubber trees facilitates sampling activities. nymphs and adults can be sampled from leaves on the external part of branches located in the lower section of the north or south side of rubber trees.
Dinamicas de urbaniza??o na hiperperiferia da metrópole de S?o Paulo: análise dos processos de expans?o urbana e das situa??es de vulnerabilidade socioambiental em escala intraurbana
Alves, Humberto Prates da Fonseca;Alves, Claudia Durand;Pereira, Madalena Niero;Monteiro, Antonio Miguel Vieira;
Revista Brasileira de Estudos de Popula??o , 2010, DOI: 10.1590/S0102-30982010000100009
Abstract: the objective of this article is to analyze, on an intraurban scale, the interrelations among processes of urban expansion and situations of socioenvironmental vulnerability in a hyperperipheral region of the s?o paulo metropolitan region in recent years (2000 to 2006). this geographical region includes the district of cidade tiradentes and its surrounding area, located at the extreme eastern side of the municipality of s?o paulo. the overall methodology of the study involves the mapping of the use of the soil and of the areas of urban expansion, using satellite images, as well as the identification and characterization of situations (areas) of socioenvironmental vulnerability. to this end, socioenvironmental indicators are constructed and analyzed based on census sectors from the federal census of 2000, including socioeconomic, demographic and environmental data. the results show a strong correlation between the processes of urban expansion and growth of substandard settlements and situations of socioenvironmental vulnerability in the hyperperipheral region of cidade tiradentes and its surrounding area. it was also seen that there are broad overlappings between social and environmental vulnerabilities, with strong concentration of social and environmental problems and risks in certain areas, as is the case of the census sectors of high socioenvironmental vulnerability in the cidade tiradentes region. these areas show irregularity in the use of the soil and widespread presence of substandard settlements such as shantytowns and irregular subdivision projects. there are also extremely critical socioeconomic conditions, with very low levels of income, formal education and sanitation.
Forma tumoral da esquistossomose mansoni cerebelar: relato de caso e medida dos granulomas
Raso, Pedro;Tafuri, Alexandre;Lopes, Ney da Fonseca;Monteiro, Eduardo Rossi;Tafuri, Wagner Luiz;
Revista da Sociedade Brasileira de Medicina Tropical , 2006, DOI: 10.1590/S0037-86822006000300012
Abstract: an unusual case of the tumoral form of cerebellar schistosomiasis mansoni, in a 15 year-old male diagnosed by biopsy, with neurological signs and symptoms 60 days prior to surgery. computerized tomography show a hyperdense expanding lesion located in cerebellum, suggesting glioma. histopathological examination showed numerous s. mansoni ova involved by granulomatous inflammation in necrotic-exudative phase, located mainly in the internal, granular layer of the cerebellum, creating a pseudotumor in the cerebellar vermis and a recent hemorrhage in the trunk. the areas of granulomas were measured.
Avalia o da utiliza o do "cio do potro" na coleta de embri es
Carvalho Giovanni Ribeiro de,Fonseca Francisco Aloizio,Silva Filho José Monteiro da,Ruas José Reinaldo Mendes
Revista Brasileira de Zootecnia , 2001,
Abstract: Foram comparadas coletas de embri es de éguas paridas no "cio do potro" (n=19) com coletas de éguas solteiras (n=18). N o foram observadas diferen as entre os grupos nas taxas de recupera o de embri es (57,9 e 50,0%); no dia da coleta (idade do embri o), 7,84 e 7,66; na dura o da coleta (8,63 e 9,00 minutos); na recupera o do meio de lavagem (1921 e 1934 mL); no tamanho do embri o com sete dias (0,42 e 0,44 mm); no tamanho do embri o com oito dias (1,11 e 1,66 mm); na condi o do embri o (3,81 e 3,55); no intervalo do início do cio à ovula o (6,44 e 5,66 dias); e no diametro do folículo à ovula o (38,76 e 37,55 mm), para éguas paridas no "cio do potro" e solteiras, respectivamente. Houve diferen a no número de cobri es por ciclo, que foi de 2,5 e 1,9 para o "cio do potro" e as éguas solteiras, respectivamente. N o houve diferen as entre os grupos nas concentra es de progesterona no dia da coleta.
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