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Sample records for sediments rj brazil

  1. Bacteriological study of the superficial sediments of Guanabara bay, RJ, Brazil

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    Frederico Sobrinho da Silva

    2008-03-01

    Full Text Available Thirty sediment samples were collected in Guanabara Bay in August, November and December 2005. The material was analyzed for organic matter, total and faecal coliforms, heterotrophic bacteria, bacterial respiratory activity, esterase activity and electron transport system activity. The organic matter in the superficial sediments (2 cm ranged from 4 to 6%. The highest level of total coliforms and faecal coliforms were 1.7 x 10(5 MPN/g and 1.1 x 10³ MPN/g, respectively. Heterotrophic bacteria presented the highest values at station 7 (4.1 x 10(6 CFU/g and the lowest values at station 3 (7 x 10(4 CFU/g (northwestern part of Guanabara Bay. Esterase enzyme activity showed activity in the sediment of all 30 stations. Electron transport system activity ranged between 0.047 muL O2/h/g and 0.366 muL O2/h/g at six stations. The benthic microbial foodweb is anaerobic. Anaerobic processes such as fermentation, denitrification and sulphate-reduction are responsible for the biogeochemical cycles in the sediment of Guanabara Bay. The input of untreated sewage in the Mangue Channel outflow in Guanabara Bay has favored the increase of the organic load, and the maintenance of the total coliforms and faecal coliforms in the sediment. Faecal coliforms have been reported to be a good indicator of aquatic pollution and organic contamination in the water column, but total coliforms may be an ideal candidate group for sediment quality tests as well.Trinta amostras de sedimento foram coletadas na Baía de Guanabara em agosto, novembro e dezembro de 2005. Foram analisados matéria orgânica, coliformes totais e fecais, bactéria heterotrófica, atividade respiratória bacteriana, atividade de esterase e do sistema transportador de elétrons. A matéria orgânica no sedimento superficial variou entre 4 e 6%. O maior nível de coliformes totais e fecais foi 1.7 x 10(5 MPN/g e 1.1 x 10³ MPN/g, respectivamente. Bactérias heterótrofas mostraram o maior valor na esta

  2. Chemical and microbiological characterization of mangrove sediments after a large oil-spill in Guanabara Bay - RJ - Brazil

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    Maciel-Souza,Maria do Carmo; Macrae,Andrew; Volpon,Antonia Garcia Torres; Ferreira,Patrícia Silva; Mendonça-Hagler,Leda Cristina

    2006-01-01

    Seventeen months after a 1,3 million L oil spill into Guanabara Bay, analyses of mangrove sediments showed that the three sites closest to the spill remain highly polluted (>10 µg-g-1 polyaromatic hydrocarbons). A fourth site was less polluted, from which most hydrocarbon degrading bacteria were isolated.

  3. HIGH-RESOLUTION ACOUSTIC MAPPING OF GAS CHARGED SEDIMENTS AND LIVING BENTHIC FORAMINIFERA ASSEMBLAGES FROM THE NE REGION OF THE GUANABARA BAY (RJ, BRAZIL

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    Francielli Paula Delavy

    2016-10-01

    Full Text Available This work was performed in the NE region of the Guanabara Bay, a highly impacted Brazilian coastal system, located in Rio de Janeiro State. It aimed to: i identify and map the areas with occurrence of gas in the sediment, as well as its acoustic signature; ii characterize the physical properties of the sediments and; iii document the response of microbenthic organisms (living benthic foraminifera to changes in quantity and quality of organic matter. Seismic surveys at the frequency of 12 kHz identified a large area with about 50% gas charged sediments in the study area. The main acoustic signatures of the shallow gas were black shadow and gas blanket. In addition, features related to gas seepages to the water column (acoustic plumes and pockmarks and gas percolation within the sediments (intra-sedimentary plumes, turbidity pinnacles were also identified. The gas has a biogenic origin and results from the high sedimentation rate between 0.03 to 0.9 cm.year-1 and from the decomposition of large amount of organic matter (10-20%. Vertical distribution of gas ranges from few centimeters to 9 m below the water-sediments interface. These occurrences are related to both gas migration from lower sedimentary layers to Holocene muds above, and to recent generation in near-surface sediments as the area display favorable conditions for gas production. Cores ranging from 150-240 cm in length have predominantly muddy sediments and variations in the P-wave velocity followed the changes in sediment density, controlled mainly by the presence of gas in sediments, bioclasts accumulation, textural variation and percentage of organic matter. The TOC content and Rock-Eval pyrolysis parameters evaluated in nine surface sediment samples indicate that good to excellent amount of organic matter associated with moderate to good source potential for gas production is present in the study area. In these areas living benthic foraminifera are of reduced diversity and density

  4. Impact evaluation of the liquid effluent disposal of the Duque de Caxias Refinery (REDUC) in fluvial waters and sediments, RJ, Brazil; Avaliacao do impacto do descarte de efluentes liquidos da Refinaria Duque de Caxias (REDUC) sobre aguas e sedimentos fluviais, RJ, Brasil

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    Bidone, Edison Dausacker; Santelli, Ricardo Erthal; Cordeiro, Renato Campello [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil); Gamboa, Carla Maria; Camaz, Fernando Ribeiro; Jorge, Fabricio Goncalves [PETROBRAS/REDUC, Rio de Janeiro, RJ, RJ (Brazil). Refinaria de Duque de Caxias; Carvalho, Maria de Fatima B. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    The purpose of this work is to assess the contribution of the liquid effluents of the Duque de Caxias Refinery (REDUC) in the water and sediment contamination in the estuarine Iguacu-Sarapui system, a tributary of the Guanabara Bay, Rio de Janeiro, Brazil. Since 2002 is being conducted a quarterly monitoring of some parameters in water, river sediments and treated liquid effluent, such as: pH, suspended solids, total sedimented solids, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, total organic carbon, oil and grease (O and G), phenols, sulfide, ammonia, metals and metalloids (V, Cr, Pb, Ni, Cu, Cd, Zn, Hg, As, Se , Co, Fe, Mn), polycyclic aromatic hydrocarbons, coprostanol and cholesterol (indicators of domestic wastes). The obtained results show that the effluents meet the legal standards and the treated liquid effluents from REDUC in the estuarine system have little or no impact on river water quality. The higher levels of contaminants detected in water and sediments samples are directly related to untreated domestic sewage from urban areas. (author)

  5. Sorption of {sup 60}Co and {sup 137}Cs in sediments at Piraquara de Fora, Angra dos Reis, RJ, Brazil; Sorcao de {sup 60}Co e {sup 137}Cs em sedimentos do Saco de Piraquara de Fora - Angra dos Reis

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    Carvalho, Franciane M.; Martins, Nadia S.F.; Lauria, Dejanira D., E-mail: francian@ird.gov.br, E-mail: nadia@ird.gov.br, E-mail: dejanira@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Ferreira, Ingryd M., E-mail: ingrydmarques@hotmail.com [Instituto Federal do Rio de Janeiro (IFRJ), RJ (Brazil); Azevedo, Izabella M.A.P., E-mail: izabella_azevedo@id.uff.br [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2013-07-01

    In this study, sediment of Piraquara de Fora, located near the launch area of the effluents of the Central Nuclear Almirante Alvaro Alberto - CNAAA Nuclear Power Plants, were collected. It were determined the parameters particle size and cationic exchange capacity (CTC). From the sorption curves of {sup 60}Co and {sup 137}Cs, obtained experimentally in the laboratory, were estimated preliminary values of Kd at equilibrium, for these radionuclides in order of magnitude of 10{sup 2}.

  6. Diet of the lizard Mabuya agilis (Sauria; Scincidae in an insular habitat (Ilha Grande, RJ, Brazil

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    C. F. D. Rocha

    Full Text Available We examined the stomach contents of 21 specimens of Mabuya agilis (Sauria; Scincidae collected during February 2001 at the restinga habitat of Praia do Sul, in Ilha Grande, RJ, Brazil. Diet was composed of various types of small arthropods, with no plant material being eaten. Spiders were the most important items in the diet, followed by orthopterans. Apart from the absence of isopterans, the diet of Mabuya agilis from this insular area was similar to those of other conspecific mainland populations. This suggests that factors such as insularity and the absence of other small sympatric lizards may not have a significant effect on the feeding habits of the Praia do Sul population.

  7. Chemical and microbiological characterization of mangrove sediments after a large oil-spill in Guanabara Bay - RJ - Brazil Caracterização química e microbiológica de sedimentos de manguezal após um grande derramamento de óleo na Baia de Guanabara, RJ, Brasil

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    Maria do Carmo Maciel-Souza; Andrew Macrae; Antonia Garcia Torres Volpon; Patrícia Silva Ferreira; Leda Cristina Mendonça-Hagler

    2006-01-01

    Seventeen months after a 1,3 million L oil spill into Guanabara Bay, analyses of mangrove sediments showed that the three sites closest to the spill remain highly polluted (>10 µg-g-1 polyaromatic hydrocarbons). A fourth site was less polluted, from which most hydrocarbon degrading bacteria were isolated.Dezessete meses após um derramamento de 1,3 milhões de litros de óleo na Baía de Guanabara, análises de sedimento do manguezal mostraram que os três pontos de amostragem mais próximos d...

  8. Chemical and microbiological characterization of mangrove sediments after a large oil-spill in Guanabara Bay - RJ - Brazil Caracterização química e microbiológica de sedimentos de manguezal após um grande derramamento de óleo na Baia de Guanabara, RJ, Brasil

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    Maria do Carmo Maciel-Souza

    2006-09-01

    Full Text Available Seventeen months after a 1,3 million L oil spill into Guanabara Bay, analyses of mangrove sediments showed that the three sites closest to the spill remain highly polluted (>10 µg-g-1 polyaromatic hydrocarbons. A fourth site was less polluted, from which most hydrocarbon degrading bacteria were isolated.Dezessete meses após um derramamento de 1,3 milhões de litros de óleo na Baía de Guanabara, análises de sedimento do manguezal mostraram que os três pontos de amostragem mais próximos do local do acidente permanecem altamente poluídos (>10 µg-g-1 hidrocarbonetos poliaromáticos. Do quarto ponto de amostragem, o menos poluído, foi isolada a maioria das bactérias degradadoras de hidrocarbonetos.

  9. [Daily eating habits of obese women living in Rocinha Shanytown (Rio de Janeiro, RJ, Brazil)].

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    Ferreira, Vanessa Alves; Magalhães, Rosana

    2011-06-01

    This article presents conclusions of research conducted at Ensp/Fiocruz, as part of a master's degree course. One of the objectives of the research to investigate the eating habits of women living in the Rocinha Shantytown (Rio de Janeiro, RJ, Brazil) from a socio-anthropological perspective. The results revealed that the eating habits of the group were repetitive, with few variations in the menu consisting basically of rice, bean, sugars and fats. We further observed the rejection of industrialized and canned products. This food consumption pattern seems to conform to Brazilian food culture revealing the preservation of the national identity based on feeding habits. Consequently, it is necessary to set aside presuppositions regarding the relationship between food consumption and obesity, especially with respect to the predominant idea of changes in diet with the incorporation of a "modern" or "western" diet that prevail in studies in the field of nutrition in Brazil. In this sense, we signaled the need to reassert a multidimensional approach for studies about food and nutrition in the country. This proposal involves overcoming restricted conceptual outlooks and the creation of new avenues of investigation.

  10. Mineral composition of pastures and mineral deficiencies in cattle of some properties in Middle Paraiba, RJ, Brazil

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    Ana Paula Lopes Marques

    2014-01-01

    Full Text Available ABSTRACT. Marques A.P.L., Botteon R.C.C.M., Amorim E.B., Botteon P.T.L &Zonta E. [Mineral composition of pastures and mineral deficiencies in cattle of some properties in Middle Paraiba, RJ, Brazil.] Composição mineral das pastagens e deficiências minerais dos bovinos em algumas propriedades da região do Médio Paraíba, RJ, Brasil. Revista Brasileira de Medicina Veterinária, 36(1:71-78, 2014. Departamento de Medicina e Cirurgia Veterinária, Universidade Federal Rural do Rio de Janeiro, BR 465 Km 7, Seropédica, RJ 23851-900, Brasil. E-mail: marquesapl@ufrrj.br We studied levels and nutrient availability in the soil and grazing of cattle in Middle Paraíba, RJ, Brazil in the early dry season (May-June and rainy (November-December in seven cattle herds with a history of clinical deficiencies of Na, Cu, Co and P, identified through visits to farmers. The mineral contents in the samples were determined by atomic absorption spectrophotometry and values obtained were compared with clinical signs found. Low values of P and Na were confirmed and although the lack of Ca and Mg is uncommon, some samples showed low rates. We found high values of Fe with possible interference in the absorption of Cu, the main clinical deficiency identified in the region, and high values of Al, Zn and Mn. The results indicate that most mineral deficiencies diagnosed in those herds is due to antagonistic effects of minerals that are not deficient.

  11. Integrated Tools for American Cutaneous Leishmaniasis Surveillance and Control: Intervention in an Endemic Area in Rio de Janeiro, RJ, Brazil

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    Cheryl Gouveia

    2012-01-01

    Full Text Available American cutaneous leishmaniasis (ACL is a focal disease whose surveillance and control require complex actions. The present study aimed to apply integrated tools related to entomological surveillance, environmental management, and health education practices in an ACL-endemic area in Rio de Janeiro city, RJ, Brazil. The distribution of the disease, the particular characteristics of the localities, and entomological data were used as additional information about ACL determinants. Environmental management actions were evaluated after health education practices. The frequency of ACL vectors Lutzomyia (N. intermedia and L. migonei inside and outside houses varied according to environment characteristics, probably influenced by the way of life of the popular groups. In this kind of situation environmental management and community mobilization become essential, as they help both specialists and residents create strategies that can interfere in the dynamics of vector’s population and the contact between man and vectors.

  12. Spatial-temporal analysis of marine debris on beaches of Niterói, RJ, Brazil: Itaipu and Itacoatiara.

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    Silva, Melanie Lopes da; Araújo, Fábio Vieira de; Castro, Rebeca Oliveira; Sales, Alessandro Souza

    2015-03-15

    In many areas of the world, studies of marine debris are conducted with an emphasis on analyzing their composition, quantification and distribution on sandy beaches. However, in Brazil, studies are still restricted to some areas of the coast, and the quantities and the spatial and temporal patterns are unknown. To enhance the marine debris information in these areas, we selected the Itaipu and Itacoatiara beaches in Niterói, RJ, to collect, quantify and qualify the solid residues present in their sands. We collected 12 samples and recorded 118.39 kg of residues in Itaipu and 62.94 kg in Itacoatiara. At both beaches, the largest portion of debris was located on the upper part of the beach. Several debris items were related to food and drink consumption on the beaches, which indicated the contribution of beach users to pollution. Most of the debris was plastic. The greatest amount of debris was found at Itaipu in January and February and at Itacoatiara in January and March, months related to both the holiday season and abundant rainfall. The results demonstrated the necessity to implement an Environmental Education project for these areas to reduce its degradation. Copyright © 2015 Elsevier Ltd. All rights reserved.

  13. Comparative study of ceramic tiles produced in the Town of Goytacazes / RJ (Brazil); Estudo comparativo de telhas ceramicas produzidas no municipio de Campos dos Goytacazes, RJ

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    Almeida, L.L.P. de; Pacheco, A.T.; Carreiro, R.S; Petrucci, L.J.T., E-mail: lezira@ig.com.br [Fundacao de Apoio a Escola Tecnica (FAETEC), Campos dos Goytacazes, RJ (Brazil). Centro Vocacional Tecnologico - Ceramica

    2011-07-01

    The city of the Campos dos Goytacazes, situated in the region north of the state of Rio de Janeiro, presents characteristics place that it enter the producing greater of blocks and ceramic roofing tiles for the domestic market. This work makes a study enters four manufacturers of ceramic roofing tiles of the city of the Campos dos Goytacazes/RJ, to analysis comparatively its results according to in agreement the characterization submitted to dilatometry, Thermogravimetry, Differential Thermal Analysis and X-ray diffraction for the physical tests the tiles were collected after burning and the tests under Bylaw NBR 15310. The results had indicated a significant variation in the values of water absorption of each manufacturer. The same ones demonstrate that the ceramic roofing tiles of Campos of the Goytacazes present a uniformity in the results, being that it needs technological accompaniment during the manufacture process, to improve its properties and its quality for adequacy to the normative parameters of the ABNT. (author)

  14. Fish resources management in Brazil and overview of artisanal fisheries in Macaé, RJ

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    Natalia Raposo da Silva

    2013-07-01

    Full Text Available The aim of this review is to highlight the sociocultural and environmental importance of artisanal fisheries for the city of Macaé, Rio de Janeiro, Brazil, providing information about the main artisanal fisheries methods applied by the fishers, a brief history of public policy for fishing in Brazil, and an overview of the economy working relations and fish marketing in that city. Once the definitions of artisanal and industrial fishing are modified according to the State or region, we are consider artisanal fishing, for the purpose of this work, as that practiced by professional fisherman directly, independently, or as family economy, with production means of their own, or through partnership contract, landed, allowing the use of small ships. Five main artisanal fishing methods were detected in Macaé: (i the line method, (ii the method of surface longline; (iii the driftnet method; (iv the drag; and (v the method of network seines, or pair. In this analysis, we focused on four major public policy processes which led to setting up a model of fishery management, in which crisis is evident, with an overcoming not yet fully delineated. Since the fishing activity is important for the region, the development of studies able to define the supply chain structuring programs, expansion of investments, creation of a framework for its own staff and, especially aimed at management concepts that can coordinate all activity from production, through processing to marketing, are significant steps to strengthen the fisheries policy in the city of Macaé.

  15. Capture of Caliptrate flies with different breeding substrates on beaches in Rio de Janeiro, RJ, Brazil

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    José Mário D'Almeida

    1993-06-01

    Full Text Available Muscidae flies belonging to four Familia and 13 species in a total number of 3.652 specimens were collected from beaches at Ilha do Governador, Rio de Janeiro, Brazil using different breeding substrates, and subsequently bred in the laboratory. Captures were done from April to November 1989, using in a first phase different substrates: fruits (banana and papaya, vegtable (tomato, animal viscera (bovine liver, marine animals (fish, crab, shrimp, squid, mouse carcass and feaces (human and canine. The species collected more often were: Fannia sp. (subgroup pusio, Chrysomya megacephala, Phaenicia eximia, Synthesiomyia nudiseta, Peckya chrysostoma, Musca domestica and Atherigona orientalis. In a later phase, only fish was used, as bait and placed directly on the beach sand. From a total of 189 pupae, the following adult specimen were obtained: Peckia chrysostoma (58.06%, Chrysomya megacephala (30.64% and in lesser numbers Synthesiomyia nudiseta and Phaenicia eximia.

  16. Release of alpha emitters into the environment by Nuclear Industries of Brazil in Resende, RJ

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    Pereira, Wagner S.; Kelecom, Alphonse; Santos, Rodney; Santos, Maisa F.M.; Torres, Vinicius R.M.; Rodrigues, Jéssica J.S., E-mail: comap@inb.gov.br, E-mail: pereiraws@gmail.com, E-mail: lararapls@hotmail.com [Indústrias Nucleares do Brasil (COMAP.N/FCN/INB), Resende RJ (Brazil). Fábrica de Combustível Nuclear. Coordenação de Meio Ambiente e Proteção Radiológica Ambiental; Universidade Veiga de Almeida (UVA), Rio de Janeiro, RJ (Brazil); Universidade Federal Fluminense (LARARA-PLS/UFF), Niterói, RJ (Brazil). Laboratório de Radiobiologia e Radiometria

    2017-07-01

    The Nuclear Industries of Brazil operates in the field of nuclear energy and has a monopoly on mining and manufacturing the nuclear fuel element in Brazil. The Nuclear Fuel Factory is also responsible for the reconversion process, the manufacture of the pellets and the assembly of the fuel element. Once there is a possibility of particulate material generation during the reconversion processes and the manufacture of pellets, a method of collective protection of the worker was established, which includes a system of air exhaustion of the factory area, with the capacity to renew the indoor air six times per hour. As a control measure, there is a system of automatic detection of the release of radionuclides in the chimney that monitors and calculates the released values. Through the dose calculation model established by the National Commission for Nuclear Energy the release limit is fixed at 1.2∙ 10{sup 7}Bq.y{sup -1} of alpha emitters by FCN. The present work aims to evaluate the alpha radionuclides released by FCN, in terms of total release (Bq) and Activity Concentration (AC, mBq∙m{sup -3}). In 2016 it was released 4.14∙10{sup 6}Bq.y{sup -1}, which means an average of 3.45∙10{sup 5}Bq.month{sup -1}. The largest mean for AC was 4.03 mBq∙m{sup -3}. The release data was almost an order of magnitude lower than the annual release limit, proving the suitability of the atmospheric effluents to the licensing requirements. The largest magnitudes of the two variables (AC and release) were observed in August while the smallest ones, in January. (author)

  17. Seasonal diet shift in a Tetragonopterinae (Osteichthyes, Characidae) from the Ubatiba River, RJ, Brazil.

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    Mazzoni, R; Rezende, C F

    2003-02-01

    In the present study, we describe feeding habits of Deuterodon sp. from the Ubatiba River and explore if diet changes according to a temporal cycle of dry and wet seasons. We observed that Deuterodon sp. fed on an extremely high diversity of items ranging from organic matter, sediment (sand plus quartz parts), algae, seeds and leaves to animal organisms, such as, crustaceans, oligochaets and several life stages of terrestrial and aquatic insects, indicating an omnivorous diet. An important shift in the use of feeding resources was also registered; animal and vegetal items had alternated importance between both seasons. Allochthonous vs. autochthonous items analysis showed predominance of allochthonous items during dry season while no significant differences were registered during wet season.

  18. Seasonal diet shift in a Tetragonopterinae (Oateichthyes, Characidae from the Ubatiba river, RJ, Brazil

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    Mazzoni R.

    2003-01-01

    Full Text Available In the present study, we describe feeding habits of Deuterodon sp. from the Ubatiba River and explore if diet changes according to a temporal cycle of dry and wet seasons. We observed that Deuterodon sp. fed on an extremely high diversity of items ranging from organic matter, sediment (sand plus quartz parts, algae, seeds and leaves to animal organisms, such as, crustaceans, oligochaets and several life stages of terrestrial and aquatic insects, indicating an omnivorous diet. An important shift in the use of feeding resources was also registered; animal and vegetal items had alternated importance between both seasons. Allochthonous vs. autochthonous items analysis showed predominance of allochthonous items during dry season while no significant differences were registered during wet season.

  19. Geochemical behavior of heavy metals in differents environments in Rodrigo de Freitas lagoon - RJ/Brazil

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    Estefan M Fonseca

    2011-06-01

    Full Text Available The accelerated urbanisation without a planning, brought several environmental problems to Rio de Janeiro coastal zone, especially in areas such as Rodrigo de Freitas lagoon, which receives a great amount of untreated sewage every day. To assess the nature, potentially sources and extent of heavy metal pollution in the lagoon, sediments from the surrounding streets, from the entrance of the main canal that drains to the lagoon and from the bottom of the lagoon were collected and analysed by a modified selective extraction procedure in order to study the geochemical partitioning and bioavailability of Zn, Cu, Cr, Ni and Pb in these three compartments. The present study verified an increase in the Cu, Pb and Zn concentrations in the north of the Rodrigo de Freitas lagoon. Despite the different levels of oxidation between the sediments accumulated in the streets and in the bottom of the lagoon, the geochemical partitioning of the heavy metals did not show any pattern of variation for the metals, except for the element Cu. No concentrations were found in the soluble phase of samples collected in the surfacial sediments of the lagoon, suggesting no bioavailability of heavy metalsA urbanização acelerada, sem planejamento, resultou em uma série de problemas à zona costeira do Rio de Janeiro, especialmente em áreas como a Lagoa Rodrigo de Freitas, a qual recebe uma grande descarga de esgoto não tratado todos os dias. No intuito de avaliar a natureza, as fontes potenciais e a extensão da poluição por metais pesados na lagoa, sedimentos das ruas do entorno, das entradas do principal canal de drenagem e de superfície de fundo foram coletados. As análises se deram através de um método modificado de extração sequencial, com o objetivo de estudar o fracionamento geoquímico e a biodisponibilidade de Zn, Cu, Cr, Ni e Pb, nestes três compartimentos. O presente estudo verificou um aumento nas concentrações de Cu, Pb, e Zn no setor norte da

  20. Summertime thermohaline structure off the Brazil Current Region between Santos (SP and Rio de Janeiro (RJ

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    Edmo José Dias Campos

    1994-12-01

    Full Text Available Within the scope of the MAR-14 Project, part of the Brazil-Germany Bilateral Agreement in Marine Sciences, an oceanographic survey aboard the R/V Victor Hensen was carried out in Brazilian coastal waters between Santos (23º56'S and Rio de Janeiro (22º54'S, from January 15 to January 22,1991. In this article we report results of preliminary analyses of the hydrographic data collected with CTD, STD, Nansen bottles and XBT's. These preliminary results show intense stratification in the first 200 m depth, and the penetration of the Brazil Current deep into the continental shelf region. Two eddy-like features were detected. The first one, anticyclonic, was located in the northern part of the domain and confined to the uppermost 200 m. The second, a cyclonic vortex, was found a little to the southwest below 200 m and extending downwards to about 800 m depth. Water mass analyses based on T-S diagrams suggest that the interface between the South Atlantic Central Water (SACW and the Antarctic Intermediate Water (AIW is located at about 500 m depth. One important aspect of this study is that this was the first time a high resolution survey with a CTD probe was realized along the eastern Brasilian Coast, south of Cabo Frio.Como parte do projeto MAR-14, componente do Acordo Bilateral Brasil-Alemanha em Ciências Marinhas, uma campanha oceanógrafica a bordo do R/V Victor Hensen foi realizada em águas costeiras do Brasil entre Santos (23º56'S, de 15 a 22 de janeiro de 991. Neste artigo reportamos resultados de análises preliminares dos dados hidrográficos coletados com o auxílio de CTD, STD, garrafas de Nansen e XBT's. Esses resultados preliminares mostram uma intensa estratificação nos primeiros 200 m de profundidade, e a penetração da corrente bem adentro da região sobre a plataforma continental. Duas estruturas com características de vórtices de meso-escala foram detectadas. O primeiro, anticiclônico, estava localizado na parte norte da

  1. Occurrence and distribution of the exotic lizard Hemidactylus mabouia Moreau de Jonnès, 1818 in Ilha Grande, RJ, Brazil

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    CFD Rocha

    Full Text Available The gekkonid lizard Hemidactylus mabouia is an exotic species in Brazil and is found in different ecosystems. This species was recorded at Ilha Grande, RJ, one of the largest insular remains of the Atlantic Rainforest in Brazil. In this study, the occurrence of H. mabouia was determined throughout the island, including the rain forest, restinga and anthropic environments. We used the active search method in points along 19 trails that surround Ilha Grande. At each regular interval of 100 m, we searched for the presence of H. mabouia. The species was recorded in a total of 100 points among the 719 sampled and, in all cases, the occurrence of the lizard corresponded to points located in anthropic or perianthropic areas. As most of Ilha Grande is covered by dense tropical rain forest, we believe this has restricted the invasion of H. mabouia in natural environments within the island.

  2. The influence of vegetation cover and soil physical properties on deflagration of shallow landslides - Nova Friburgo, RJ / Brazil

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    de Oliveira Marques, Maria Clara; Silva, Roberta; Fraga, Joana; Luiza Coelho Netto, Ana; Mululo Sato, Anderson

    2017-04-01

    In 2011, the mountainous region of the State of Rio de Janeiro (Brazil) suffered enormous social and economic losses due to thousands of landslides caused by an extreme rainfall event. The mapping of the scars of these landslides in an area of 421 km2 in the municipality of Nova Friburgo, RJ - Brazil resulted in a total of 3622, and 89% of these scars were located in areas covered by grasses and forests. Despite the unexpected result (64% of scars in forest areas), field evidence has shown that most of the forest fragments in the municipality are in the initial stages of succession and in different states of degradation, evidencing the need for a better understanding of the role of these forests in the detonation and propagation of landslides. Two slope forest areas with different ages (20 and 50 years) were evaluated in relation to the vegetative aspects that influence the stability of the slopes in each area. Hydrological monitoring, including precipitation, interception by manual and automatic method, soil moisture and subsurface flows were performed in two different areas: forest and grass. Soil moisture was monitored by granular matrix sensors and flows by collecting troughs in trenches at depths of 0 cm, 20 cm, 50 cm, 100 cm, 150 cm and 220 cm, which were also analyzed for biomass and length of thick roots (> 2 mm diameter) and thin roots (soil physical properties (particle size, aggregate stability, porosity and hydraulic conductivity in situ). In the grass area, the lower soil structure in relation to the forest areas makes it difficult to transmit the water through the soil matrix. During the monitoring period, that area preserved the moisture in depths of 100 cm, 150 cm and 220 cm. The fasciculate root system of the grasses increased the infiltration of water at the top of the soil, favouring the formation of more superficial saturation zones in the heavy rains, due to the hydraulic discontinuities. In forest areas, infiltration by preferential paths

  3. Práticas alimentares cotidianas de mulheres obesas moradoras da Favela da Rocinha (Rio de Janeiro, RJ, Brasil Daily eating habits of obese women living in Rocinha Shanytown (Rio de Janeiro, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Vanessa Alves Ferreira

    2011-06-01

    Full Text Available O presente artigo apresenta conclusões de uma pesquisa desenvolvida na Ensp/Fiocruz, como parte do curso de mestrado. A pesquisa teve como um dos objetivos investigar as práticas alimentares de mulheres moradoras da Favela da Rocinha (Rio de Janeiro, RJ na perspectiva socioantropológica. Os resultados revelaram que a alimentação do grupo era monótona, com poucas variações do cardápio composto basicamente por arroz, feijão, açúcares e gorduras. Observamos ainda a rejeição aos produtos industrializados e enlatados. Este padrão de consumo alimentar parece se aproximar da cultura alimentar brasileira, revelando a preservação da identidade nacional a partir da alimentação. Dessa forma, há necessidade de superar pressupostos em torno da relação entre consumo alimentar e obesidade, especialmente no que diz respeito à ideia predominante de mudanças na dieta com a incorporação de uma dieta "moderna" ou "ocidental" que permeia grande parte dos estudos no campo da nutrição no Brasil. Nessa direção, sinalizamos a necessidade de resgatar a abordagem multidimensional para os estudos sobre alimentação e nutrição no país. Tal proposta implica a superação de quadros conceituais restritos e a construção de novas agendas de investigação.This article presents conclusions of research conducted at Ensp/Fiocruz, as part of a master's degree course. One of the objectives of the research to investigate the eating habits of women living in the Rocinha Shantytown (Rio de Janeiro, RJ, Brazil from a socio-anthropological perspective. The results revealed that the eating habits of the group were repetitive, with few variations in the menu consisting basically of rice, bean, sugars and fats. We further observed the rejection of industrialized and canned products. This food consumption pattern seems to conform to Brazilian food culture revealing the preservation of the national identity based on feeding habits. Consequently, it is

  4. Evaluation of microplastics in Jurujuba Cove, Niterói, RJ, Brazil, an area of mussels farming.

    Science.gov (United States)

    Castro, Rebeca Oliveira; Silva, Melanie L; Marques, Mônica Regina C; de Araújo, Fábio V

    2016-09-15

    Once non-biodegradable, microplastics remain on the environment absorbing toxic hydrophobic compounds making them a risk to biodiversity when ingested or filtered by organisms and entering in the food chain. To evaluate the potential of the contamination by microplastics in mussels cultivated in Jurujuba Cove, Niterói, RJ, waters of three stations were collected during a rain and dry seasons using a plankton net and later filtered. Microplastics were quantified and characterized morphologically and chemically. The results showed a high concentration of microplastics in both seasons with diversity of colors, types and sizes. Synthetic polymers were present in all samples. The presence of microplastics was probably due to a high and constant load of effluent that this area receives and to the mussel farming activity that use many plastic materials. Areas with high concentrations of microplastics could not be used for mussel cultivation due to the risk of contamination to consumers. Copyright © 2016 Elsevier Ltd. All rights reserved.

  5. REPRODUCTIVE CYCLE OF Leporinus copelandii (Pisces: Anostomidae FEMALES FROM THE LOWER PARAÍBA DO SUL RIVER BASIN, RJBRAZIL

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    Ana Paula Ribeiro Costa Erthal

    2015-12-01

    Full Text Available The aim of this study were investigate the reproductive biology of the fish Leporinus copelandii, a specie at risk of extinction in the lower Paraíba do Sul River basin. During a period of 14 months, a total of 143 females of red-piau were captured, between Itaocara and Campos dos Goytacazes cities (RJ, Brazil. A histological study shows four stages of the oocyte development (I, II, III and IV and five stages of the reproductive cycle of females: rest (1, initial maturation (2A, intermediary (2B, advanced (2C and spawned (4 were identified. The pattern of L. copelandii oocyte development suggests development type synchronous in two groups, characterizing total spawning. Spawned females were captured in November, two months after the peak of frequency of competent females for reproduction. Histologically, a little occurrence of empty follicles was observed in spawned females. The medium diameter of the type IV oocyte of the spawned females (1475.1 ± 884.3mm was significantly larger (Tukey, P <0.001; VC = 41.73%; n = 259 than advanced maturation females (1202.6 ± 245.3mm, what allows suggesting that the study place probably doesn't represent the reproductive area of L. copelandii.

  6. The status of toxicity tests with sediment in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, R.P.A. [Companhia de Tecnologia e Saneamento Ambiental, Sao Paulo (Brazil)

    1995-12-31

    The earliest studies in Brazil aiming to evaluate sediment quality through toxicity tests started in the beginning of the 80`s. These were developed by the Environmental Sanitation Agency of Sao Paulo State (CETESB) in Cubatao River and Billings Reservoir, which are located in industrialized and populous regions. Elutriate phase sediment toxicity tests were run with Daphnia similis. In the Cubatao River Basin the combination of toxicity, chemistry data and benthic community structure provided clear indications of sites with different levels of pollution. At this time there was a consensus that the study of a complex compartment such as sediment needed improvements in sampling and analysis procedures. Only in the 90`s the investigations involving sediment toxicity assessment were resumed by CETESB, and it was clear that integrative studies were needed in order to make environmental quality assessment. This kind of studies were conducted by CETESB in some highly polluted areas of Sao Paulo State, Ceriodaphnia dubia and Photobacterium phosphoreum interstitial water tests and Hyalella sp whole sediment tests were run, and the results correlated with several sediment organic and inorganic contaminants. The Sediment Quality Triad proposed by Chapman was applied in one of these studies. This approach was extremely useful in interpreting the data. At the same time marine sediment toxicity tests were developed by CETESB in collaboration with Sao Paulo University, and tests were run with the amphipods Tiburonella viscana, Battyporeiapus bisetosus; tanaidacean Kalliapseudes shubarti and the echinoderm Lytechinus variegatus. The embryo test with L. variegatus was the most adequate in these studies. Nowadays there are other groups in some universities developing sediment toxicity tests with Hyalella and Chironomus in response to a growing concern in Brazil to establish adequate sediment quality assessment guidelines.

  7. Levels of polonium-210 in highly consumed sea foods from a fish market of the city of Niteroi, RJ-Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Marsico, Eliane T.; Sao Clemente, Sergio C. de [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Faculdade de Veterinaria. Dept. de Tecnologia de Alimentos; Kelecom, Alphonse; Gouvea, Rita de Cassia S. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Dept. de Biologia Geral. Lab. de Radiobiologia e Radiometria Pedro Lopes dos Santos - LARARA

    2007-07-01

    Polonium-210 ({sup 210}Po), a short-lived member from the uranium series, is broadly distributed in Nature being among all alpha-emitters the major contributor to the internal dose in man. Studies of diets have shown that marine foods are important sources of this radionuclide. The levels of {sup 210}Po have been determined in three highly consumed marine species, the fishes Sardinella brasiliensis (sardine) and Thunnus atlanticus (tuna), and the shrimp Litopenaeus brasiliensis, purchased from the Niteroi (RJ, Brazil) fish market, and caught along the coast of the state of Rio de Janeiro. Doses of {sup 210}Po were determined for the entire organisms and for some tissues and organs, such as eyes, heart, gills, muscle, stomach liver, intestine and pyloric caecal (fishes) or eyes, head content, exoskeleton, muscle, hepatopancreas and pleopods. {sup 210}Po is not uniformly distributed within these species, the highest levels being observed for sardine in the intestine (1634.6 mBq g-1), tuna in pyloric caecal (4656.1 mBq g-1) and shrimp in the hepatopancreas (1460.5 mBq g-1). The {sup 210}Po activities in sardine, tuna and shrimp, calculated on a mean whole-organism basis, were 64.6, 34.5 and 39.5 Bq kg-1 (dry weight) respectively, with corresponding concentration factors of 7.2 x104, 3.8 x104 and 4.4 x104. Considering body distribution, almost 60% of the total activity is concentrated in the pyloric caecal of both fishes and in the hepatopancreas of the shrimp. In turn, the edible parts concentrate much less activity. (author)

  8. Infant mortality in a very low birth weight cohort from a public hospital in Rio de Janeiro, RJ, Brazil

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    Regina Coeli Azeredo Cardoso

    2013-09-01

    Full Text Available OBJECTIVES: to evaluate infant mortality in very low birth weight newborns from a public hospital in Rio de Janeiro, Brazil (2002-2006. METHODS: a retrospective cohort study was performed using the probabilistic linkage method to identify infant mortality. Mortality proportions were calculated according to birth weight intervals and period of death. The Kaplan-Meier method was used to estimate overall cumulative survival probability. The association between maternal schooling and survival of very low birth weight infants was evaluated by means of Cox proportional hazard models adjusted for: prenatal care, birth weight, and gestational age. RESULTS: the study included 782 very low birth weight newborns. Of these, (28.6% died before one year of age. Neonatal mortality was 19.5%, and earlyneonatal mortality was 14.9%. Mortality was highest in the lowest weight group (71.6%. Newborns whose mothers had less than four years of schooling had 2.5 times higher risk of death than those whose mothers had eight years of schooling or more, even after adjusting for intermediate factors. CONCLUSIONS: the results showed higher mortality among very low birth weight infants. Low schooling was an independent predictor of infant death in this low-income population sample.

  9. Popular knowledge: impacts and methods for controlling Achatina fulica in Valença – RJ, Brazil

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    Evelyn Durço

    2013-03-01

    Full Text Available This study aimed to check the incidence of the African snail Achatina fulica in the Cambota neighborhood, Valença, Rio de Janeiro, Brazil, and investigate control strategies adopted by the population. Epidemiological questionnaires applied to 105 inhabitants evaluated the existence of their contact to the animal, the risk of infection by parasites, due to hygiene behaviors, and the control methods adopted. The presence of mollusks was reported in 52.5% of visited households. Out of these, 51.4% had rodents. Collected mollusks were analyzed with regard to the presence of nematodes. In the households with a positive result for the presence of A. fulica, direct contact to the mollusks was reported (21.9% by handling (often inappropriate or intake. All respondents said to use some technique for food hygiene and 67.6% said to know angiostrongyliasis. All respondents said to practice extermination of mollusks, 28.5% of them by breaking the shell. Despite the high incidence of A. fulica, larvae of Angiostrongylus sp. or other nematodes of medico-veterinary importance weren’t found in the analyzed specimens.

  10. Methane concentration in water column and in pore water of a coastal lagoon (Cabiúnas lagoon, Macaé, RJ, Brazil

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    André Luiz dos Santos Fonseca

    2004-06-01

    Full Text Available The aim of this study was to evaluate methane concentration in water column and pore water at limnetic and littoral regions of a coastal lagoon. At the littoral region samples were taken from three monospecific macrophytes stands (Typha domingensis, Eleocharis interstincta and Potamogeton stenostachys. The methane concentration in the pore water at the littoral region was higher than the concentration found at the limnetic region in each fraction of the sediment. The higher methane concentration in the superficial fraction of the sediment (0-2 cm was shown at the P. stenostachys stand (3.7 mM. It was the only significantly different (p0.05. It could be concluded that there was a high influence of aquatic macrophytes on the pore water methane concentration.O objetivo dessa pesquisa foi determinar a concentração de metano na coluna d'água e na água intersticial do sedimento nas regiões limnética e litorânea de uma lagoa costeira (Lagoa Cabiúnas, Macaé, RJ. Na região litorânea as amostras foram coletadas em três estandes de macrófitas (Typha domingensis, Eleocharis interstincta e Potamogeton stenostachys. A concentração de metano na água intersticial na região litorânea foi maior do que aquela encontrada na região limnética em cada fração do sedimento. A maior concentração de metano na fração superficial do sedimento (0-2 cm foi observada no estande de P. stenostachys (3.7 mM. Este resultado foi o único significativamente diferente (p0.05. Os resultados sugerem que há uma considerável influência das macrófitas aquáticas estudadas na concentração de metano na água intersticial do sedimento.

  11. Sucessão vegetal em uma encosta reflorestada com leguminosas arbóreas em Angra dos Reis, RJ Natural succession under a nitrogen-fixing legume trees stand in a hillside at Angra dos Reis - RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Sylvia de Souza Chada

    2004-12-01

    Full Text Available Em uma encosta reflorestada há sete anos com leguminosas arbóreas (Acacia auriculiformis, A. mangium e Mimosa tenuiflora em Angra dos Reis, RJ, foi avaliada a composição florística e fitossociológica da regeneração natural, comparando-as com as de um fragmento de Mata Secundária situado a 200 m de distância. Foram considerados os três terços da encosta, com declividades decrescentes. Em 12 parcelas de 200 m², quatro em cada terço da encosta, foram amostrados 699 indivíduos vegetais a partir de 40 cm de altura, distribuídos em 25 famílias e 50 espécies. As famílias com maior nº de indivíduos foram Meliaceae (298, Euphorbiaceae (70, Piperaceae (64 e Lauraceae (41. Já as famílias com maior nº de espécies foram Solanaceae (7, Melastomataceae (5 e Myrtaceae (5. As leguminosas plantadas não estavam regenerando na própria área. A evolução da sucessão natural apresentou um gradiente de desenvolvimento em razão da menor declividade e menor distância dos remanescentes florestais, com maior densidade de indivíduos e maior riqueza de espécies na área de menor declividade.The floristic composition and natural regeneration under a 7-year-old legume tree plantation (Acacia auriculiformis, A. mangium e Mimosa tenuiflora was investigated in comparing with a secondary forest 200 m away at Angra dos Reis, RJ. The hillside was divided in 3 parts following the slope. The lower part of the hillside was the nearest to the natural forest remnant. In 12 plots with 200 m² each, 4 of them in each section of the hillside, 699 plants larger then 40 cm height were observed, distributed in 25 families and 50 species. The families with the most individuals were Meliaceae (298, Euphorbiaceae (70, Piperaceae (64 and Lauraceae (41. The families with the most species were Solanaceae (7, Melastomataceae (5 and Myrtaceae (5. None of the legume species introduced in the area had produced natural regeneration. The evolution of natural succession

  12. Sedimentation Rate and 210Pb Sediment Dating at Apipucos Reservoir, Recife, Brazil

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    Rízia K. do Nascimento

    2012-09-01

    Full Text Available The Apipucos Reservoir is located in Pernambuco-Brazil. Several districts of the metropolitan area use this reservoir to dispose of rubbish, waste and sewage. Dating sediments uses the 210Pb from the atmosphere. 210Pb is a daughter of the 222Rn, which emanates from the soil but is different from that contained in the sediment, which is in balance with the 226Ra. The chosen model for dating sediments depends on certain conditions: in environments where the amount of sediment can vary, the Constant Rate of Supply (CRS model is adopted. In environments where the sediments can be considered to be constant, a Constant Initial Concentration (CIC model is applied. A 70 cm long and 5 cm internal-diameter wide core was used for sediment sampling. Samples were dried at 105 °C, and about 5 g dry material was dissolved with acids. The 210Pb and 226Ra content was determined by their radioactive descendants’ concentrations. For the second sampling point, both models could be used. The results showed an increase in sedimentation rate over the last 50–60 years. We could conclude that the top sediment interval had been there 30 years ago. We could decide that the CRS was the best applicable model.

  13. Virtual Visit - Nilopolis, RJ, Brazil

    CERN Multimedia

    ATLAS Visitor Centre

    2016-01-01

    No contexto da exposição "Exploradores do Conhecimento" estudantes de escolas do Rio de Janeiro, vêem à Universidade Federal do Rio de Janeiro aonde poderão participar em várias atividades, incluindo uma visita virtual ao Experimento ATLAS no CERN, Suíça

  14. Effect of sediment composition on methane concentration and production in the transition zone of a mangrove (Sepetiba Bay, Rio de Janeiro, Brazil Efeito da composição do sedimento sobre a concentração e a produção do metano na zona de transição de um mangue tropical, na Baía de Sepetiba-RJ, Brasil

    Directory of Open Access Journals (Sweden)

    CC. Marinho

    2012-08-01

    Full Text Available The aim of this research was to evaluate the effect of sediment composition on methane (CH4 dynamics in sediments of different areas in the transition zone between a mangrove and the sea. This research was conducted in a mangrove at Coroa Grande, on the southern coast of Rio de Janeiro. Samples were collected at three stations: (1 region colonised by Rhizophora mangle L. on the edge of the mangrove, (2 region colonised by seagrasses and (3 infra-littoral region without vegetation. Samples were collected from the surface layer of the sediment to determine the concentrations of nutrients (C, N and P and CH4 concentration and production. We observed that concentrations of CH4 and carbon (C were significantly higher (p O objetivo desta pesquisa foi avaliar a dinâmica do metano (CH4 no sedimento em diferentes áreas na região de transição entre a borda do manguezal e o mar, em função da composição do sedimento. A pesquisa foi realizada no Manguezal de Coroa Grande, no litoral sul do Estado do Rio de janeiro. Foram coletadas amostras em três estações: (1 região colonizada por Rhizophora mangle L. na borda do mangue, (2 região colonizada por macrófitas, e (3 região sem vegetação, permanentemente inundada pelo mar. Foram coletadas amostras da fração superficial do sedimento para determinação da concentração de nutrientes (C, N e P, e da concentração e da produção de CH4. Foi observado que as concentrações de CH4 e carbono (C foram significativamente maiores (p < 0,05 na estação 1, em relação à estação 3. Com relação às razões molares (C:N, C:P e N:P, estas indicam que a origem da composição do substrato é principalmente autóctone. Quanto à metanogênese, foram observados, inicialmente, baixos valores de CH4 produzido, indicando provável competição entre metanogênicos e sulfatorredutores. Seguiu-se, então, um significativo aumento (p < 0,05 da metanogênese no 26º dia, no sedimento da estação 1

  15. Urban sediment particle size and pollutants in Southern Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Poleto, Cristiano; Merten, Gustavo H. [Federal Univ. of Rio Grande do Sul - UFRGS, Porto Alegre, RS (BR). Hydraulic Research Inst. (IPH); Bortoluzzi, Edson C. [Univ. of Passo Fundo - UPF, RS (Brazil); Charlesworth, Susanne M. [Coventry Univ. (United Kingdom). Dept. of Geography, Environment and Disaster Management

    2009-08-15

    Background, aim and scope: Studies of particulate-associated pollutants, or PAPs, in urban areas have become necessary due to their potentially deleterious effects on the environment. However, it is not just the sediments themselves which are problematic but also their particle size composition, which has a great influence on their capacity to adsorb and transport pollutants. This paper presents the particle size distributions and concentrations of five metals (Cr, Cu, Ni, Pb and Zn) of urban sediments collected from paved streets and gully pots from 20 cities in southern Brazil. The cities have different characteristics and hence sources of PAPs associated with differing geologies, soil types and type of urbanisation. Studies of this nature enable elucidation of the relationship between diffuse sources such as streets and gully pots and the likelihood of PAPs to subsequently pollute the urban aquatic environment. Materials and methods: Sediment samples were taken at random from paved streets and gully pots in 20 cities in Rio Grande do Sul state, southern Brazil by means of a portable vacuum cleaner to avoid loss of finer particles. The particle sizes of the samples were measured using a Cilas {sup registered} 1180 laser particle analyzer, and the concentrations of five metals (Cr, Cu, Ni, Pb and Zn) were determined by wet acid digestion (HCl-HF-HClO{sub 4}-HNO{sub 3}) followed by inductively coupled plasma atomic emission spectroscopy on the <63-{mu}m fraction. Results: It was found that in comparison to sediments collected from the streets, gully pot sediments were more heterogeneous in terms of particle size and also that sediment samples from the gully pots were predominantly coarser than those originating on the streets. From the gully pot results, analysis of the modal particle diameter enabled the cities to be divided into three categories. The concentrations of metals in the street sediments were similar across all 20 cities, with all concentrations above

  16. Fatores associados à subnotificação de pacientes com Aids, no Rio de Janeiro, RJ, 1996 Variables associated with underreporting of AIDS patients, Brazil, 1996

    Directory of Open Access Journals (Sweden)

    Vanja MB Ferreira

    2000-04-01

    Full Text Available OBJETIVO: Existe uma expressiva subnotificação de casos de Aids no Município do Rio de Janeiro, RJ. Nesse sentido, foi realizado estudo com o objetivo de analisar os fatores associados a esse evento. MÉTODOS: Com base em dados do Sistema de Informações Hospitalares do Sistema Único de Saúde, referentes ao ano de 1996 e ao Município do Rio de Janeiro, e do Sistema de Informações sobre Agravos de Notificação, atualizado até setembro de 1997, selecionou-se uma amostra aleatória de prontuários, pela qual os pacientes foram classificados em notificados, não notificados e sem evidência para notificação. Foi utilizado um modelo multinomial para a análise das chances de ocorrência de subnotificação versus notificação e não-notificação sem evidência de diagnóstico de Aids versus notificação. RESULTADOS: Não foram encontradas associações estatisticamente significativas entre as variáveis "idade", "estado civil", "escolaridade", "ocupação" e "gravidade da doença" e subnotificação de casos de Aids. A variável "sexo feminino" apresentou forte associação com as internações por procedimento Aids sem evidências para `fechar caso' dessa doença. Foi encontrada associação bastante expressiva entre ter sido internado no mesmo hospital mais de uma vez e estar notificado. A presença de um setor de vigilância epidemiológica no hospital esteve inversamente associada à subnotificação de casos de Aids. CONCLUSÕES: Os resultados mostraram que a associação significativa entre variáveis organizacionais e estruturais e subnotificação de casos de AIDS apontam para a necessidade de normatização de processos e fluxos, a fim de melhorar a qualidade do sistema de informações em saúde.OBJECTIVE: The underreporting of AIDS cases in the municipality of Rio de Janeiro, Brazil, is significant. The study intends to analyze the factors associated to this event. METHODS: Using data provided by the Hospital Information

  17. Evaluation of the sedimentation rate in a sediment profile of Bortolan Dam, MG, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Heleine C. de; Soares, Flávio V.T.S.; Taddei, Maria Helena T.; Mazzilli, Barbara P., E-mail: heleine.almeida@ipen.br, E-mail: mhtaddei@cnen.gov.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Laboratório de Poços de Caldas (LAPOC/CNEN-MG), Pocos de Caldas, MG (Brazil)

    2017-11-01

    Volcanic extrusion is one of the main causes for the high levels of environmental radioactivity in the region of Poços de Caldas (MG, Brazil). Uranium mining during the 80's further increased the background radiation in the region, especially in the Ribeirao das Antas watershed, where Bortolan Dam is located. Besides the uranium mining facility operating in the region, other activities, such as agriculture, were also responsible for the enhancement of the levels of radioactivity. The dam sediment profile provides an appropriate compartment for the study of the temporal variation of these radionuclides and for the evaluation of anthropogenic contamination. The main aim of this study is to evaluate the sedimentation rate and the dating of a profile collected in Bortolan Dam, by using the geochronology method. The activity concentration of {sup 226}Ra and {sup 210}Pb were measured in the sediment profile by gamma spectrometry. The concentration of {sup 226}Ra and {sup 210}Pb varied from (217 ± 9) Bq kg{sup -1} to (286 ± 12) Bq kg{sup -1} and from (262 ± 11) Bq kg{sup -1} to (322 ± 34) Bq·kg{sup -1} respectively; and the sedimentation rates varied from 0.021 to 0.144 g cm{sup -2}y{sup -1}. (author)

  18. Parasitas gastrointestinais em cães institucionalizados no Rio de Janeiro, RJ Intestinal parasitic helminths in institutionalized dogs of Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Mauricio Carvalho de Vasconcellos

    2006-04-01

    Full Text Available Foi estudada a ocorrência de parasitas gastrointestinais em cães recolhidos e mantidos em instituto público de medicina veterinária no Rio de Janeiro, RJ. Amostras de fezes frescas foram coletadas em março de 2004 e analisadas pelos métodos de flutuação de Willis e centrífugo-flutuação em solução de sacarose. De 204 amostras, 45,6% estavam positivas para helmintos gastrointestinais.The occurrence of intestinal parasitic helminths in dogs from a public institute of veterinary medicine in Rio de Janeiro was assessed. Samples of fresh feces were collected in March 2004 and analyzed by Willis and centrifugal-flotation in sucrose solution methods. Of 204 samples, 45.6% were positive for helminths.

  19. [Domestic violence against children and prospects for intervention of the Family Health Program: the experience of the Family Doctor Program/Niterói (RJ, Brazil)].

    Science.gov (United States)

    Rocha, Pedro Carlos Xavier da; Moraes, Claudia Leite

    2011-07-01

    This study seeks to estimate the prevalence of psychological and physical violence practiced against children in the family environment among clients of the Family Medical Program in Niterói (RJ). It also discloses some potential opportunities for action in the prevention, early detection and monitoring of families experiencing violence. This population-based survey was conducted with face-to-face interviews with parents or legal sponsors of 278 children registered in 27 teams of the Family Health Program. The population studied was randomly selected among children up to ten years of age. The Brazilian version of Parent-Child Conflict Tactics Scales - CTSPC was employed to assess the occurrence of this type of violence. Psychological aggression occurred in 96.7% (CI 95%: 94.7-98.8) of the households, and corporal punishment occurred in 93.8% (CI 95%: 92.0-96.7). Minor physical violence was reported by 51.4% (CI 95%: 45.5-57.3) of the respondents, and severe physical maltreatment by 19.8% (CI 95%: 15.1-24.5) of them. Although the mother was the foremost perpetrator of all kinds of maltreatment, most of the children were abused by both parents. In view of these results, domestic violence against children should be seen as a main concern for the Family Health Program.

  20. Kinetic behavior of manganese in mangrove ecosystem - Itacuruca, Rio de Janeiro State, Brazil; Comportamento cinetico do manganes numa floresta de manguezal - Itacuruca, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Canesin, Fatima de Paiva; Bellido Junior, Alfredo Victor [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Inst. de Quimica. Lab. de Quimica Nuclear; Bellido, Luis Fernando [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

    2002-07-01

    The redox cycling of manganese has pronounced effects on the adsorption of trace elements onto oxide surfaces is leaving these unavailable for the biota. Specific constants for the kinetics oxidation reaction of Mn in mangrove ecosystems have been measured. Water samples with different characteristics were collected in a tidal creek in a mangrove forest growth at Itacuruca, RJ. The methodology used to study the kinetics was, incubation of the water, in laboratory, with Mn-54. The oxides precipitates were filtered at constant intervals of time. The Mn-54 decay on the filters and filtrates were counted, for 600 s, in HPGe and associated electronics ORTEC. Ln A x t diagram showed an autocatalytic kinetic behavior. Temperature, pH, O{sub 2} dissolved, salinity, Mn (II) and Mn (IV) were appraised. The rate constant k{sup '}{sub 1}1 varied from 1,0 x 10{sup -5} to 4,0 x 10{sup -5} s{sup -1}. The k{sup '}{sub 2} rate constant had a larger variation, according to the other kinetic model that shows more of a heterogeneous affect, or catalysis via bacteria. We found a mean half life for Mn(II) of 12 h for the homogeneous kinetics in the mangrove. Rate constants increased with the pH, temperature, O{sub 2} dissolved, tide height, and decrease with salinity. (author)

  1. Consulta ginecológica sob a ótica de estudantes do ensino médio do Rio de Janeiro, RJ Consulta ginecológica bajo la óptica de estudiantes de educación secundaria en Rio de Janeiro, RJ High school students' opinions of gynecological consultations in Rio de Janeiro, Southeastern Brazil

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    Sandra de Morais Pereira

    2013-02-01

    Full Text Available OBJETIVO: Analisar diferenças socioculturais e percepções sobre a consulta ginecológica por adolescentes. MÉTODOS: Estudo transversal com 418 alunas do ensino médio de três escolas de diferentes perfis, localizadas na cidade do Rio de Janeiro, RJ, em 2010. Aplicou-se questionário estruturado, abordando características sociodemográficas, comportamento sexual e avaliação da consulta ginecológica. Utilizou-se o teste de Qui-quadrado (Yates e o t de Student, adotando-se p OBJETIVO: Analizar diferencias socioculturales y percepciones sobre la consulta ginecológica en adolescentes. MÉTODOS: Estudio transversal con 418 alumnas de educación secundaria de tres escuelas con diferentes perfiles, localizadas en la ciudad de Rio de Janeiro, RJ, en 2010. Se aplicó cuestionario estructurado, abordando características sociodemográficas, comportamiento sexual y evaluación de la consulta ginecológica. Se utilizó la prueba de Chi-cuadrado (Yates y el t de Student, adoptándose un pOBJECTIVE: To analyze sociocultural differences and perceptions of gynecological consultations for high school girls. METHODS: A transversal study with 418 high school girls from three schools of different profiles in the city of Rio de Janeiro, Southeastern Brazil in 2010. A structured questionnaire encompassing socio-demographic characteristics, sexual behavior and evaluation of gynecological consultations was completed. Yates' Chi-square test and the Student's t-test were utilized adopting a value of p < 0.05. RESULTS: The students of private and federal public schools presented similar profiles but both were different from the state school girls. The latter had lower socioeconomic status, and their parents had lower levels of education, the predominance of afro-descendants was observed, as were a larger number of sexual partners, pregnancy and cases of sexual violence. The average age of menarche and sexarche among the students were similar, but the first

  2. Estrutura diamétrica da comunidade e das principais populações arbóreas de um remanescente de Floresta Atlântica Submontana (Silva Jardim-RJ, Brasil Diametric structure of a tree community and its main populations in a Sub-montane Atlantic Forest remnant (Silva Jardim-RJ, BraziL

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    Fabrício Alvim Carvalho

    2009-04-01

    Full Text Available O objetivo deste trabalho foi avaliar a estrutura diamétrica arbórea de um remanescente de Floresta Atlântica Submontana no Município de Silva Jardim, RJ. Foram utilizadas 20 parcelas de 100 x 5 m, em que todas as árvores com DAP > 5 cm foram amostradas. A estrutura diamétrica foi analisada em toda a comunidade e nas principais populações (determinadas segundo o VI, a partir de histogramas com intervalos de classes definidos pela fórmula de Spiegel. A análise também considerou os grupos sucessionais das espécies (pioneiras: PI; secundárias iniciais: SI; e secundárias tardias: ST. As curvas (J-reverso e valores do quociente "q" indicaram ausência de problemas de regeneração das principais populações, a maioria de espécies SI. Entretanto, foi observada tendência de saída de algumas das principais populações de ST (ex. Plathymenia foliolosa e Euterpe edulis, paralelamente à entrada de outras SI. Os resultados complementam as análises florísticas desenvolvidas anteriormente no remanescente, o que indica que a estrutura diamétrica também foi alterada pela fragmentação e pelas perturbações antrópicas pretéritas. Ações coibindo novas perturbações e o enriquecimento através do plantio de mudas das espécies mais afetadas são urgentes, visando à recuperação da qualidade ambiental desse remanescente.This work analyses the tree diametric structure of a Sub-montane Atlantic Forest remnant in Silva Jardim-RJ, Brazil. Twenty 100 m x 5 m plots were established, and all trees with DBH > 5 cm were surveyed. The diametric structure was analyzed for the entire community and its main populations (ordered according to the importance value - VI, using diameter class histograms defined by Spiegel's formula. Species were also grouped within successional categories (Pi: pioneer; SI: early secondary; ST: late secondary. The diametric curves (J-reverse shape and values of Liocourt's 'q' quotient suggested problems involving lack

  3. Fitossociologia do estrato arbóreo em uma toposeqüência alternada de mata atlântica, no munícipio de Silva Jardim-RJ,Brasil Phytosociology of the wood stratum of a modified atlantic forest toposequence in Silva Jardim-RJ, Brazil

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    Rosângela Alves Tristão Borém

    2002-11-01

    Full Text Available Este estudo foi realizado em um fragmento de Floresta Atlântica pertencente à fazenda Biovert, no município de Silva Jardim, Rio de Janeiro. Teve como objetivos a caracterização da vegetação e a análise da estrutura da comunidade arbórea que ocorre ao longo de uma toposseqüência de um trecho de Floresta Atlântica bastante alterado antropicamente, de forma a estabelecer critérios adequados para seu manejo e sua recuperação. Para o estudo foi empregado o método de amostragem por parcelas de área fixa, distribuídas de forma sistemática, na toposseqüência. Os dados foram coletados de parcelas amostrais de 600 m², alocadas nos terços inferior, médio e superior de uma toposseqüência. Foram registrados, por espécie, os nomes vulgares e científicos e a circunferência do tronco a 1,30 m (CAP. No levantamento da composição florística foram constatadas 43 famílias, 95 gêneros e 129 espécies, obtendo-se um índice de diversidade de Shannon (H' de 4,137 nats/indivíduo. As espécies mais importantes (VI foram Euterpe edulis, Cecropia glaziovii, Astrocaryum aculeatissimum e Piptadenia gonoacantha.This work was developed in a fragment of the Atlantic Forest, owned by Biovert Farm in Silva Jardim-RJ, Brazil to characterize and analyze the arboreous community structure occurring along an anthropically modified toposequence, to determine adequate criteria for its management and recuperation. The floristic composition and the phytosociological structure of the forest covering were studied. Data were collected from sample plots of 600 m², which were divided according to the topography into lower, middle, and upper slope, located in a soil toposequence. The common and scientif names and the diameter at breast height (DBH were recorded for every individual. In the floristic composition survey, 43 families, 95 genera and 129 species were determined. Shannon diversity index (H' was 4.137 nats/individual. The most important species

  4. Effects of dredging operations on sediment quality. Contaminant mobilization in dredged sediments from the Port of Santos, SP, Brazil

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    Torres, Ronaldo J.; Santos, Fernando C.; Mozeto, Antonio A. [Lab. de Biogeoquimica Ambiental, Dept. de Quimica, Univ. Federal de Sao Carlos, Sao Paulo, SP (Brazil); Abessa, Denis M.S.; Maranho, Luciane A.; Davanso, Marcela B. [Campus Experimental do Litoral Paulista, UNESP - Univ. Estadual Paulista ' Julio de Mesquita Filho' , Sao Paulo, SP (Brazil); Nascimento, Marcos R.L. do [Lab. de Pocos de Caldas (LAPOC), CNEN-Comissao Nacional de Energia Nuclear, MG (Brazil)

    2009-10-15

    Background, aim, and scope Contaminated sediments are a worldwide problem, and mobilization of contaminants is one of the most critical issues in environmental risk assessment insofar as dredging projects are concerned. The investigation of how toxic compounds are mobilized during dredging operations in the channel of the Port of Santos, Brazil, was conducted in an attempt to assess changes in the bioavailability and toxicity of these contaminants. Materials and methods Bulk sediment samples and their interstitial waters and elutriates were subjected to chemical evaluation and ecotoxicological assessment. Samples were collected from the channel before dredging, from the dredge's hopper, and from the disposal site and its surroundings. Results The results indicate that the bulk sediments from the dredging site are contaminated moderately with As, Pb, and Zn and severely with Hg, and that polycyclic aromatic hydrocarbon (PAH) concentrations are relatively high. Our results also show a 50% increase in PAH concentrations in suspended solids in the water collected from the hopper dredge. This finding is of great concern, since it refers to the dredge overflow water which is pumped back into the ecosystem. Acute toxicity tests on bulk sediment using the amphipod Tiburonella viscana showed no toxicity, while chronic tests with the sea urchin Lytechinus variegatus showed toxicity in the interstitial waters and elutriates. Results are compared with widely used sediment quality guidelines and with a sediment quality assessment scheme based on various lines of evidence. Conclusions The data presented here indicate that the sediments collected in this port show a certain degree of contamination, especially those from the inner part of the channel. The classification established in this study indicated that sediments from the dredged channel are impacted detrimentally and that sea disposal may disperse contaminants. According to this classification, the sediments are

  5. Sedimentation rates in Atibaia River basin, Sao Paulo State, Brazil, using {sup 210}Pb as geochronometer

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    Sabaris, T.P.P. [Departamento de Petrologia e Metalogenia, Universidade Estadual Paulista (UNESP), Av. 24-A, No. 1515, C.P. 178, CEP 13506-900, Rio Claro, Sao Paulo (Brazil); Bonotto, D.M., E-mail: danielbonotto@yahoo.com.b [Departamento de Petrologia e Metalogenia, Universidade Estadual Paulista (UNESP), Av. 24-A, No. 1515, C.P. 178, CEP 13506-900, Rio Claro, Sao Paulo (Brazil)

    2011-01-15

    The constant initial concentration (CIC) of unsupported/excess {sup 210}Pb model was successfully used to assess {sup 210}Pb data of nine sediment cores from Atibaia River basin, Sao Paulo State, Brazil. The {sup 210}Pb-based apparent sediment mass accumulation rates ranged from 47.7 to 782.4 mg/cm{sup 2} yr, whereas the average linear sedimentation rates between 0.16 and 1.32 cm/yr, which are compatible with the calculated sediment mass fluxes, i.e. a higher sediment mass accumulation rate yielded a higher linear sedimentation rate. The higher long-term based accumulation rate tended to be found in topographically softer regions. This occurs because the sediments are preferentially transported in topographically steeper regions instead of being deposited. Anthropic activities like deforestation possibly interfered with the natural/normal sedimentation processes, which increased in accordance with modifications on the channel drainage. The radionuclide geochronology as described in this paper allows determination of sedimentation rates that are compatible with values estimated elsewhere. The adoption of an appropriate factor generated from previous laboratory experiments resulted in a successful correction for the {sup 222}Rn-loss from the sediments, bringing the estimate of the parent-supported (in-situ produced) {sup 210}Pb to reliable values required by the CIC model.

  6. Prevalence and factors associated with frailty in an older population from the city of Rio de Janeiro, Brazil: the FIBRA-RJ Study

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    Virgílio Garcia Moreira

    2013-07-01

    Full Text Available OBJECTIVE: Frailty syndrome can be defined as a state of vulnerability to stressors resulting from a decrease in functional reserve across multiple systems and compromising an individual's capacity to maintain homeostasis. The purpose of this study was to determine the prevalence of frailty and its association with social and demographic factors, functional capacity, cognitive status and self-reported comorbidities in a sample of community-dwelling older individuals who are clients of a healthcare plan. METHODS: We evaluated 847 individuals aged 65 years or older who lived in the northern area of the city of Rio de Janeiro, Brazil. The subjects were selected by inverse random sampling and stratified by gender and age. To diagnose frailty, we used the scale proposed by the Cardiovascular Health Study, which consisted of the following items: low gait speed, grip strength reduction, feeling of exhaustion, low physical activity and weight loss. The data were collected between 2009 and 2010, and the frailty prevalence was calculated as the proportion of individuals who scored positive for three or more of the five items listed above. To verify the association between frailty and risk factors, we applied a logistic regression analysis. RESULTS: The prevalence of frailty syndrome was 9.1% (95% confidence interval [CI], 7.3-11.3; 43.6% (95% CI, 40.3-47 of the individuals were considered robust, and 47.3% (95% CI 43.8-50.8 were considered pre-frail (p<0.001. The frail individuals tended to be older (odds ratio [OR] 13.2, 95% CI, 8.7-20 and have lower education levels (OR 2.1, 95% CI, 1-4.6, lower cognitive performance (OR 0.76, 95% CI, 0.73-0.79 and reduced health perception (OR 65.8, 95% CI, 39.1-110.8. Frail individuals also had a greater number of comorbidities (OR 6.6, 95% CI, 4.4-9.9 and worse functional capacity (OR 3.8, 95% CI, 2.9-5. CONCLUSION: The prevalence of frailty was similar to that seen in other international studies and was

  7. Briófitas do Parque Nacional da Restinga de Jurubatiba, RJ, Brasil Bryophytes of Restinga de Jurubatiba National Park, Rio de Janeiro State, Brazil

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    Caio Amitrano de Alencar Imbassahy

    2009-06-01

    Full Text Available Este trabalho representa uma síntese do conhecimento florístico de briófitas do Parque Nacional da Restinga de Jurubatiba, com resultados de campo, material de herbário e publicações. Foram registrados 61 táxons de briófitas, pertencentes a 15 famílias e 33 gêneros. Para cada táxon foram analisados a distribuição geográfica, o tipo de substrato e a forma de vida. A família predominante foi Lejeuneaceae (25 espécies, seguida de Jubulaceae (sete, Calymperaceae (quatro e Sphagnaceae (quatro. Entre as espécies, predominaram as de distribuição Neotropical (35%. Com relação ao substrato preferencial, a maior parte dos táxons é corticícola. A forma de vida predominante foi o tapete, seguido pelo tufo e a trama. O Parque possui brioflora bastante representativa no que diz respeito à vegetação de restinga, com 45% dos táxons de briófitas conhecidas para as restingas no Brasil e 82% das conhecidas para as restingas do estado do Rio de Janeiro. É apresentada uma chave para identificação das espécies.We present a synthesis of the bryophyte flora in Restinga de Jurubatiba National Park, based on field work, herbaria material and bibliography. Sixty one taxa were recorded, in 15 families and 33 genera. For each taxa, we analyze geographic distribution, substrata and life form. The most species-rich family was Lejeuneaceae (25 species, followed by Jubulaceae (seven, Calymperaceae (four and Sphagnaceae (four. Most taxa have a Neotropical (35% distribution, and most taxa prefer the corticicolous substrate. Mat was the most common life form. The bryoflora of this National Park is an important reservoir of bryophyte diversity in the restingas, with 45% of the taxa known from the sandy coastal plains of Brazil and 82% known from the this habitat in Rio de Janeiro state. A key to identification of the species is given.

  8. Práticas alimentares na gravidez: um estudo com gestantes e puérperas de um complexo de favelas do Rio de Janeiro (RJ, Brasil Eating practices during pregnancy: a study of low-income pregnant and postpartum women in Rio de Janeiro (RJ, Brazil

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    Mirian Ribeiro Baião

    2010-10-01

    Full Text Available O estudo teve como objetivo analisar as práticas alimentares durante a gestação relatadas por mulheres grávidas e puérperas, moradoras em um complexo de favelas do município do Rio de Janeiro. Optou-se por uma pesquisa de base interpretativa, na qual se utilizou entrevista semiestruturada e análise de conteúdo em sua vertente temática. Foram incluídas 18 gestantes e oito puérperas (n=26, sendo sete adolescentes e 19 adultas; primíparas e multíparas. Para as mulheres, comer e assistir à televisão, comer fora de casa e comer com parentes e amigos no fim de semana eram formas de associar lazer à comida, aumentando o prazer por ela. A renda foi apontada como a principal barreira para o consumo de alimentos saudáveis, que era prioridade das crianças. Por esses motivos, leite, verduras, legumes e frutas eram pouco consumidos. A dieta era composta basicamente por arroz, feijão e frango. Houve preferência por "besteiras". As mulheres estavam submetidas a uma alimentação monótona. Ressalta-se a importância da compreensão e valorização das questões socioculturais e econômicas que influenciam as práticas alimentares, a fim de que a orientação alimentar e nutricional, visando à alimentação saudável, possa ser negociada e ajustada às necessidades e à subjetividade das mulheres grávidas.This study aimed to analyze the self-reported eating practices of pregnant and postpartum women living in a group of slum communities in the city of Rio de Janeiro, RJ, Brazil. The interpretative methodology used a semi-structured interview and thematic content analysis. The sample (n=26 consisted of 18 pregnant and 8 postpartum women, of whom 7 were adolescents and 19 adults, including both primiparous and multiparous subjects. According to these women, eating while watching television, eating out, and eating with relatives and friends on weekends were forms of associating leisure-time activities with food, thus increasing their pleasure

  9. Sedimentation rate and {sup 210}Pb sediment dating at Apipucos reservoir, Recife, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Figueiredo, Marcela D.C. de; Silva, Danubia B. da; Cunha, Manuela S. da; Rodrigues, Kelia R.G.; Pedroza, Eryka H.; Melo, Roberto T. de; Oliveira, Aristides; Hazin, Clovis A.; Souza, Vivianne L.B. de, E-mail: rtmelo@cnen.gov.b, E-mail: chazin@cnen.gov.b, E-mail: vlsouza@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2011-07-01

    The Apipucos Reservoir is located in Recife, State of Pernambuco, and, several districts of the metropolitan area use this reservoir to dispose waste and sewage. Dating sediments uses {sup 210}Pb from the atmosphere which is formed as a result of {sup 222}Rn emanation from the soil. Atmospheric lead, carried by rain, is called non-supported {sup 21}'0Pb, to differentiate it from the one contained in the sediment, in balance with the {sup 226}Ra. The model chosen for dating sediments depends on certain conditions: in an environment where the amount of sediment influx can vary, the constant rate of supply model is adopted. On the other hand, in environments where the sedimentation rate is constant and the sediment can be considered to have a constant initial concentration of unsupported {sup 210}Pb and the (CIC) model is applied. A 70-cm long, 5-cm internal-diameter wide core was collected for sediment dating. Each core was sliced, into 5 or 10 cm intervals. Samples were dried at 105 deg C, and about 5 g dry material from each sample was dissolved with acids. The {sup 210}Pb and {sup 226}Ra contents were separated and determined by beta and alpha counting by using a gas-flow proportional counter. Sediment ages were calculated by the two models, and for the second and fourth sampling points, both models could be used. The results showed an increase in sedimentation rate over the last 50 - 60 years. We can conclude that the top sediment layer is dated from 30 years ago. We can also conclude that the CRS is the best applicable model to use in this area. (author)

  10. Contamination of port zone sediments by metals from Large Marine Ecosystems of Brazil.

    Science.gov (United States)

    Buruaem, Lucas M; Hortellani, Marcos A; Sarkis, Jorge E; Costa-Lotufo, Leticia V; Abessa, Denis M S

    2012-03-01

    Sediment contamination by metals poses risks to coastal ecosystems and is considered to be problematic to dredging operations. In Brazil, there are differences in sedimentology along the Large Marine Ecosystems in relation to the metal distributions. We aimed to assess the extent of Al, Fe, Hg, Cd, Cr, Cu, Ni, Pb and Zn contamination in sediments from port zones in northeast (Mucuripe and Pecém) and southeast (Santos) Brazil through geochemical analyses and sediment quality ratings. The metal concentrations found in these port zones were higher than those observed in the continental shelf or the background values in both regions. In the northeast, metals were associated with carbonate, while in Santos, they were associated with mud. Geochemical analyses showed enrichments in Hg, Cd, Cu, Ni and Zn, and a simple application of international sediment quality guidelines failed to predict their impacts, whereas the use of site-specific values that were derived by geochemical and ecotoxicological approaches seemed to be more appropriate in the management of the dredged sediments. Copyright © 2012 Elsevier Ltd. All rights reserved.

  11. A 2400-year record of trace metal loading in lake sediments of Lagoa Vermelha, southeastern Brazil

    Science.gov (United States)

    Barros de Oliveira, Sonia Maria; Ruiz Pessenda, Luiz Carlos; Teixeira Favaro, Deborah Ines; Babinski, Marly

    2012-02-01

    Sediments of the Lagoa Vermelha (Red Lake), situated in the Ribeira Valley, southeastern Brazil, are made of a homogeneous, organic-rich, black clay with no visible sedimentary structures. The inorganic geochemical record (Al, As, Ba, Br, Co,Cs, Cr, Fe, Mn, Ni, Rb, Sc, Sb, V, Zn, Hg and Pb) of the lake sediments was analyzed in a core spanning 2430 years. The largest temporal changes in trace metal contents occurred approximately within the last 180 years. Recent sediments were found to be enriched in Pb, Zn, Hg, Ni, Mn, Br and Sb (more than 2-fold increase with respect to the "natural background level"). The enhanced accumulation of Br, Sb, and Mn was attributed to biogeochemical processes and diagenesis. On the other hand, the anomalous concentrations of Pb, Zn, Hg and Ni were attributed to pollution. As Lagoa Vermelha is located in a relatively pristine area, far removed from direct contamination sources, the increased metal contents of surface sediments most likely resulted from atmospheric fallout. Stable Pb isotopes provided additional evidence for anthropogenic contamination. The shift of 206Pb/ 207Pb ratios toward decreasing values in the increasingly younger sediments is consistent with an increasing contribution of airborne anthropogenic lead. In the uppermost sediments (0-10 cm), the lowest values of the 206Pb/ 207Pb ratios may reflect the influence of the less radiogenic Pb from the Ribeira Valley District ores ( 206Pb/ 207Pb between 1.04 and 1.10), emitted during the last 50 years.

  12. Ocorrência de Listeria spp. em amostras de carne bovina moída comercializadas no município de Niterói, RJ, Brasil Occurrence of Listeria spp. in bovine ground meat samples commercialized in Niterói, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Samira Pirola Santos Mantilla

    2007-08-01

    Full Text Available Foram analisadas 30 amostras de carne bovina moída resfriada, previamente embaladas, provenientes de estabelecimentos comercias do município de Niterói, RJ, com o objetivo de se observar a freqüência de bactérias do gênero Listeria spp. Utilizou-se para isto a metodologia revisada do USDA. 50% das amostras analisadas apresentaram contaminação por Listeria spp., sendo a L. innocua (SEELIGER & SCHOOFS, 1979 a espécie isolada em maior número, seguida pela L. monocytogenes (MURRAY et al., 1926; PIRIE, 1940. Na tipificação sorológica, observou-se maior prevalência de L. monocytogenes pertencente ao sorotipo 4b (50%, porém o sorotipo ½ c também foi identificado. As amostras que apresentaram-se contaminadas com L. monocytogenes, caracterizam-se como potencialmente capazes de ocasionar enfermidades transmitidas por alimentos.Thirty bovine ground meat samples from several markets from Niterói, RJ, were analyzed, in order to observe the frequency of bacterias of the genus Listeria spp. A USDA revised methodology as applied in this research. Fifty percent of the samples were contaminated by Listeria spp.. L. innocua species as the most isolated, followed by L. monocytogenes. In serological typification, the greatest prevalence was that of sorotype 4b L. monocytogenes (50%, however the ½ c sorotype was also identified. Samples contaminated by L. monocytogenes are potentially capable of causing diseases through food consumption.

  13. Palynomorphs in Holocene sediments from a paleolagoon in the coastal plain of extreme southern Brazil

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    Ebráilon Masetto

    2014-06-01

    Full Text Available This paper presents the results of a qualitative palynological analysis of a 140 cm-thick section of Holocene sediments from a paleolagoon, representing the last 2600 years, taken from an outcrop at Hermenegildo Beach (33º42'S; 53º18'W, located in the municipality of Santa Vitória do Palmar, in the state of Rio Grande do Sul, Brazil. Samples were treated with hydrochloric acid, hydrofluoric acid and potassium hydroxide, after which they were subjected to acetolysis and mounted on glycerin-coated slides for light microscopy analysis. Among the 48 palynomorphs identified were 25 fungi, eight algae, three bryophytes, and 12 pteridophytes. Brief descriptions and illustrations of each palynomorph are presented, together with ecological data from the organism of origin when possible. Our findings will serve as reference material for paleoenvironmental studies in the coastal plain of southern Brazil.

  14. Effects of harbor activities on sediment quality in a semi-arid region in Brazil.

    Science.gov (United States)

    Moreira, Lucas B; Castro, Ítalo B; Hortellani, Marcos A; Sasaki, Silvio T; Taniguchi, Satie; Petti, Mônica A V; Fillmann, Gilberto; Sarkis, Jorge E S; Bícego, Márcia C; Costa-Lotufo, Leticia V; Abessa, Denis M S

    2017-01-01

    Tropical marine environments are rich in biodiversity and the presence of harbor activities in these areas can harm the coastal ecosystems. In this study, we assessed sediment quality of two harbors from a tropical region in Brazil by applying multiple lines-of-evidence approach. This approach included the integration of results on: (1) grain size, organic matter, organic carbon, nitrogen, phosphorus, trace metals, polycyclic aromatic hydrocarbons, linear alkylbenzenes, and tributyltin; (2) acute toxicity of whole sediments and chronic toxicity of liquid phases; and (3) benthic community descriptors. Our results revealed that the main contaminants detected in sediments from Mucuripe and Pecém Harbors were chromium, copper, nitrogen, zinc, and tributyltin. These toxicants arise from typical harbor activities. However, the changes in benthic composition and structure appear to depend on a combination of physical impacts, such as the deposition of fine sediments and the toxic potential of contaminants, especially in Mucuripe. Thus, apart from toxicants physical processes are important in describing risks. This information may assist in management and conservation of marine coastal areas. Copyright © 2016 Elsevier Inc. All rights reserved.

  15. Possibility of groundwater as an alternative for citric culture recovery in Sao Vicente District, Araruama, Rio de Janeiro State, Brazil; Possibilidade de agua subterranea como alternativa na recuperacao da citricultura no Distrito de Sao Vicente, Municipio de Araruama, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Leonidas Castro [Universidade Federal Rural do Rio de Janeiro, RJ (Brazil)

    1995-12-31

    Results and perspectives of the Geoelectrical Resistivity Sounding Survey in Eastern Baixada Fluminense, Rio de Janeiro State, run by DEGEO/IA/UFRRJ (Rural University of Rio de Janeiro, Agronomy Institute, Geology Dept.) for the Municipal Prefecture of Araruama in Sao Vicente District, RJ, where underground is needed to support irrigation projects, mainly of citrus, are presented. Geophysical data interpretation resulted in a 900 m long geoelectrical cross section illustrating that groundwater subsurface conditions in the surveyed area comprise: the 1400-1800 ohm.m resistivimetric regions associated to the granitic-gneissic embasement`s fracturing/faulting zones; the 215 ohm.m resistivimetric region associated to the embasement`s type C weathering horizon; and all others resistivimetric regions, below the water table, ranging from 27-227 phm.m, associated to an averaging 35 m thick and course sedimentary package overlaying the crystalline. Finally it is possible to conclude that groundwater in Sao Vicente, District of Araruama, RJ, must not be considered a possibility. It must be considered a reality, and surely the only alternative for restoration and expansion of the citriculture in this rural area of Rio de Janeiro State. (author). 4 refs., 1 fig

  16. Lagrangian modeling of atmospheric dispersion of radionuclides and geographical information systems as tools to support emergency planning in area of influence of nuclear complex of Angra dos Reis, RJ, Brazil; Modelagem Lagrangeana da dispersao atmoferica de radionuclideos e sistemas de informacao geografica como ferramentas de suporte ao planejamento de emergencia na area de influencia do complexo nuclear de Angra dos Reis, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Corbiniano

    2013-07-01

    Industrial accidents generally endanger structures and the set of environmental influence area where the enterprises are located, especially when affected by atmospheric dispersion of their pollutants, whose concern with the evacuation of the population is the main goal in emergency situations. Considering the nuclear complex Angra dos Reis - RJ, based on computer modeling analysis of the mechanisms of pollutant dispersion in conjunction with geographic information systems were developed. Thus, information about the dispersion of radionuclides - from simulations performed on the HYSPLIT; meteorological data (direction, intensity and calm on the wind regime and analysis of the wind field in the region using WRF), occurrence of landslides and data on the environmental study area were integrated into a GIS database using ArcGIS platform. Aiming at the identification and definition of escape routes in case of evacuation from accidental events in CNAAA, the results point solutions for long-term planning, based on weather and landslides, and short-term, supported by simulations of the dispersion radionuclides, in order to support actions that assist local emergency planning. (author)

  17. Desenvolvimento de espécies arbóreas em sistemas agroflorestais para recuperação de áreas degradadas na floresta ombrófila densa, Paraty, RJ Evalution of forest species in agroforestry systems applied to restoration of degraded areas at ombrophylous forest, Paraty, Brazil-RJ

    Directory of Open Access Journals (Sweden)

    Márcia Cristina Soares de Souza

    2013-02-01

    Full Text Available Os sistemas agroflorestais implantados consistiram da combinação de espécies leguminosas e não leguminosas em plantio "solteiro" (uma planta/cova e "casado" (duas plantas/cova. Aos quatro anos após o plantio, foram realizadas medições de circunferência na altura do peito (CAP, altura comercial (Hc e altura total (Ht. Os resultados indicaram a eficiência do plantio "casado" nos sistemas agroflorestais, independente do uso de espécies leguminosas ou não leguminosas, indicando seu potencial de produção silvicultural para a recuperação de áreas degradadas.The objective of this study was to evaluate the growth of forest species in different agroforestry systems applied to restoration of degraded areas in Paraty-RJ. The agroforestry systems were established with leguminous and non-leguminous species in "single" (one plant/hole and "married" (two plants/hole planting. To do so, circumference at breast height, commercial height and total height of the individuals were measured after four years of the planting. The results showed the efficiency of the "married" planting in the agroforestry systems, despite of using leguminous or non-leguminous species, indicating the silvicultural potential for restoration of degraded areas.

  18. Concentrations and isotope ratios of mercury in sediments from shelf and continental slope at Campos Basin near Rio de Janeiro, Brazil.

    Science.gov (United States)

    Araujo, Beatriz Ferreira; Hintelmann, Holger; Dimock, Brian; Almeida, Marcelo Gomes; Rezende, Carlos Eduardo

    2017-07-01

    Mercury (Hg) may originate from both anthropogenic and natural sources. The measurement of spatial and temporal variations of Hg isotope ratios in sediments may enable source identification and tracking of environmental processes. In this study we establish the distribution of mercury concentrations and mercury isotope ratios in surface sediments of three transects along the continental shelf and slope in Campos Basin-RJ-Brazil. The shelf showed on average lower total Hg concentrations (9.2 ± 5.3 ng g -1 ) than the slope (24.6 ± 8.8 ng g -1 ). MMHg average concentrations of shelf 0.15 ± 0.12 ng g -1 and slope 0.13 ± 0.06 ng g -1 were not significantly different. Distinct differences in Hg isotope ratio signatures were observed, suggesting that the two regions were impacted by different sources of Hg. The shelf showed more negative δ 202 Hg and Δ 199 Hg values ranging from -0.59 to -2.19‰ and from -0.76 to 0.08‰, respectively. In contrast, the slope exhibited δ 202 Hg values from -0.29 to -1.82‰ and Δ 199 Hg values from -0.23 to 0.09‰. Mercury found on the shelf, especially along the "D" and "I" transects, is depleted in heavy isotopes resulting in more negative δ 202 Hg compared to the slope. Isotope ratios observed in the "D" and "I" shelf region are similar to Hg ratios commonly associated with plants and vegetation and very comparable to those detected in the estuary and adjoining mangrove forest, which suggests that Hg exported from rivers may be the dominating source of Hg in near coastal regions along the northern part of the shelf. Copyright © 2017 Elsevier Ltd. All rights reserved.

  19. A violência doméstica contra idosos nas áreas de abrangência do Programa Saúde da Família de Niterói (RJ, Brasil The domestic violence against the elderly within the Family Health Program of Niterói (RJ, Brazil

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    Paulo Cavalcante Apratto Júnior

    2010-09-01

    Full Text Available Este artigo investiga a magnitude e as características da violência contra idosos no domicílio por pessoas de confiança no bairro da Ilha da Conceição, em Niterói (RJ, adscritos ao Programa Saúde da Família. Através de um inquérito domiciliar, foram entrevistados 343 indivíduos com 60 anos ou mais, selecionados por amostragem aleatória simples. Para identificação de violência usou-se a Escala Tática de Conflitos. As informações sobre identificação, características demográficas e socioeconômicas foram obtidas pela Pesquisa Nacional por Amostra de Domicílio. Avaliou-se a saúde mental pelo Miniexame do Estado Mental. Para avaliação da capacidade funcional, usou-se o Health Assessment Questionnaire. Quanto à suspeita de uso de álcool pelos homens, utilizou-se o instrumento CAGE; para a idosa ou cuidadora, o instrumento TWEAK. 43% relataram pelo menos um episódio de violência psicológica. A violência física foi relatada por 9,6% dos entrevistados; 6,1% referiram ocorrência de violência física grave nesse período. A prevalência das diversas modalidades de violência foi maior entre os mais novos, com maior escolaridade, entre os que apresentam uma das patologias que caracterizam o idoso como tendo uma vulnerabilidade (depressão e/ou incontinência urinária/fecal e/ou diabetes e/ou reumatismo e entre os que moram com maior número de indivíduos.This article investigates the magnitude and characteristics of violence against the eldery by trusted people at Ilha da Conceição, Niterói - RJ registered at the Family Health Program. A domestic survey interviewed 343 individuals with 60 years or more, selected by a simple random sample. To identify the violence it was used the Conflict Tactics Scales. Information about identification, demographics and socio-economics characteristics were obtained using the National Health Interview Survey. The Mini-Mental State Examination was used to evaluate mental health. In

  20. Heterogeneidade espacial da dengue em estudos locais, Niterói, RJ Heterogeneidad espacial del dengue en estudios locales, Niteroi, Sureste de Brasil Spatial heterogeneity of dengue fever in local studies, City of Niterói, Southeastern Brazil

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    Regina Fernandes Flauzino

    2009-12-01

    Full Text Available OBJETIVO: Analisar a ocorrência espacial e temporal da dengue e sua associação com a heterogeneidade de características do ambiente urbano. MÉTODOS: Foram georreferenciados 1.212 casos de dengue registrados no Sistema de Informação de Agravos de Notificação entre 1998 e 2006, no município de Niterói, RJ, segundo setores censitários. Os setores foram classificados em áreas homogêneas para a ocorrência da doença: favela, estaleiro e urbano. Os casos foram agrupados em cinco períodos: dois interepidêmicos 1998-2000 e 2003-2005; três epidêmicos 2001, 2002 e 2006 e analisados por meio de operações entre camadas em ambiente sistema de informação geográfica. Para identificação de conglomerados com maior intensidade de casos, utilizou-se o método de kernel. O método de varredura espacial de Kulldorff foi usado para confirmação estatística desses clusters. RESULTADOS: Do total de casos, 57% eram do sexo feminino. As faixas etárias com maior concentração de casos foram de 20-29 anos (20,5% e de 30-39 anos (17,7%. O setor favela morro apresentou somente 11% dos domicílios atendidos por serviço de coleta de lixo, o maior percentual de não alfabetizados (8,7% e de chefes de família com rendimentos menores de 1 salário mínimo (29,5%. Os casos permaneceram nos setores denominados favelas. No primeiro ano epidêmico e nos períodos interepidêmicos o maior número de casos estava situado nos setores favelas morro e favela plana; no segundo e terceiro ano de epidemia, situavam-se no setor favela plana. CONCLUSÕES: A parcela economicamente ativa foi a mais atingida na área de estudo. Os setores censitários mostram heterogeneidade espacial em relação às condições de vida e dentro de alguns setores, há diferenciais na distribuição espacial e temporal do risco de ocorrência da dengue.OBJETIVO: Analizar ocurrencia espacial y temporal del dengue y su asociación con la heterogeneidad de características del ambiente

  1. Sedimentation rates in Atibaia River basin, São Paulo State, Brazil, using 210Pb as geochronometer.

    Science.gov (United States)

    Sabaris, T P P; Bonotto, D M

    2011-01-01

    The constant initial concentration (CIC) of unsupported/excess (210)Pb model was successfully used to assess (210)Pb data of nine sediment cores from Atibaia River basin, São Paulo State, Brazil. The (210)Pb-based apparent sediment mass accumulation rates ranged from 47.7 to 782.4 mg/cm(2)yr, whereas the average linear sedimentation rates between 0.16 and 1.32 cm/yr, which are compatible with the calculated sediment mass fluxes, i.e. a higher sediment mass accumulation rate yielded a higher linear sedimentation rate. The higher long-term based accumulation rate tended to be found in topographically softer regions. This occurs because the sediments are preferentially transported in topographically steeper regions instead of being deposited. Anthropic activities like deforestation possibly interfered with the natural/normal sedimentation processes, which increased in accordance with modifications on the channel drainage. The radionuclide geochronology as described in this paper allows determination of sedimentation rates that are compatible with values estimated elsewhere. The adoption of an appropriate factor generated from previous laboratory experiments resulted in a successful correction for the (222)Rn-loss from the sediments, bringing the estimate of the parent-supported (in-situ produced) (210)Pb to reliable values required by the CIC model. Copyright © 2010 Elsevier Ltd. All rights reserved.

  2. Coral community structure and sedimentation at different distances from the coast of the Abrolhos Bank, Brazil

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    Bárbara Segal

    2011-06-01

    Full Text Available Sedimentation has previously been considered an important source of impact in coral reefs. We compared 3 sites on the Abrolhos Bank, Brazil, regarding sedimentation rates, carbonate sediment composition, coral cover, and colony size for the commonest local coral species (Mussismilia braziliensis, Siderastrea stellata, and Favia gravida. The sites are located at different distances from the mainland: Pedra de Leste (14 km, Pontas Sul (26 km, and Parcel dos Abrolhos (58 km. Sedimentation was higher in winter (p A sedimentação tem sido considerada uma importante fonte de impacto nos recifes de coral. Uma comparação entre as taxas de sedimentação, teor de carbonatos nos sedimentos, cobertura coralínea e tamanho de colônias de corais para as espécies mais comuns (Mussismilia braziliensis, Siderastrea stellata, e Favia gravida foi realizada em 3 locais no Banco dos Abrolhos. Os locais representam um gradiente de distância da costa: Pedra de Leste (14 km, Pontas Sul (26 km e Parcel dos Abrolhos (58 km. A sedimentação foi maior no inverno (p <0,05, mas não foi observada diferença entre os locais. O tipo de sedimento diferiu entre locais (P <0,05, sendo que Parcel dos Abrolhos apresentou 90% de carbonatos, Pontas Sul 65% e Pedra de Leste 50%. A cobertura coralínea foi maior no local mais afastado de terra (p <0,01, onde a cobertura de zoantídeos foi menor. Diferenças de tamanho de colônias foram encontradas apenas para M. braziliensis, com menores colônias em Pedra de Leste (p <0,05. A distribuição dos sedimentos terrígenos e a turbidez devem ser os principais fatores controladores do desenvolvimento dos recifes de Abrolhos.

  3. Evaluation of the Siltation of River Taquari, Pantanal, Brazil, through 210Pb Geochronology of Floodplain Lake Sediments

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    Godoy José M.

    2002-01-01

    Full Text Available This work presents the 210Pb geochronology of seven bottom sediment cores, collected in three floodplain lakes located in the area of the middle Taquari River, Pantanal, Brazil. In five of them, a significant increase in the sediment mass deposition rate was observed, reflecting an increase of the sediment input to the Pantanal. Additionally, in order to validate the 210Pb results, the mercury content was determined for two sediment cores, showing that despite a constant concentration, the flux of Hg has increased due to an increase in the mass sedimentation rate. This increase can be attributed to the expansion of agricultural activity in the upper Taquari River during the last 25 years.

  4. OSL dating results of post-Barreiras sediments in the Paraiba basin, Northeastern Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Tudela, Diego R.G.; Munita, Casimiro S., E-mail: drtudela@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Mittani, Juan C.R.; Tatumi, Sonia H., E-mail: tatumi@fatecsp.br [Faculdade de Tecnologia de Sao Paulo (FATEC-SP/CEETEPS), Laboratorio de Datacao e Luminescencia de Cristais, Sao Paulo, SP (Brazil); Rossetti, Dilce F., E-mail: rossetti@dsr.inpe.br [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Centro de Observacao da Terra, Divisao de Sensoriamento Remoto - DSR

    2011-07-01

    In the present study we show ages of 39 sediments samples of two sedimentary units (PB1 and PB2) collected from Paraiba Basin, northeastern Brazil, obtained by optically stimulated luminescence (OSL) making use of standardized growth curve (SGC) and applying single aliquot regenerative dose (SAR) protocol in 15 randomly selected samples to validate the equivalent Dose (D{sub e}). Environmental radiation dosimetry of the area was performed to evaluate the natural concentrations of {sup 238}U, {sup 232}Th and {sup 40}K and in this way annual dose rates of the locations were evaluated. The results showed natural radioisotopes concentrations between 0.542-4.879 ppm for U, 1.314-26.098 ppm for Th and 0.141-1.12% for K and annual dose rates between 439-4172{mu}Gy/yr. The ages ranged from 1.8-178.3 kyr were obtained, and they are in agreements with the geological considerations. (author)

  5. Metal Distribution in Sediments from the Ribeira Bay, Rio de Janeiro - Brazil

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    Cardoso André G. A.

    2001-01-01

    Full Text Available Investigation of metal distribution in preserved areas is highly relevant due to the present-day lack of reliable databases against which to assess contamination. 23 samples of surface sediments from the Ribeira Bay, Rio de Janeiro State, Brazil, were analyzed by ICP/AES for Ti, Ca, Mg, Fe, Al, Sr, La, V, Y, Ni, Cu, Cr, Mn and Zn. Hg concentrations were determined by CVAAS. With respect to Al, metals were classified as strongly correlated, correlated, inversely correlated and non-correlated. Cluster analysis of the concentration data confirmed this, except for Hg. Cluster analysis of the sampling sites produced three groups, on the basis of grainsize, continental input, and marine input. Climatic and hydrodynamic factors, as well as soil characteristics, are important controls of the metal distribution in this region. The Ribeira Bay has a natural background metal content, when compared with average shales and with other impacted and non-impacted regions.

  6. Recuperação de áreas contaminadas por pesticidas organoclorados na Cidade dos Meninos, município de Duque de Caxias, RJ Recovery of soils contaminated by organochlorine pesticides in Cidade dos Meninos, Duque de Caxias, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Daniela Buosi

    2004-06-01

    Full Text Available O Serviço Nacional de Malária operacionalizou uma fábrica de pesticidas organoclorados utilizados em campanhas de saúde pública (HCH e DDT entre 1950 e 1965, na Cidade dos Meninos, no município de Duque de Caxias, RJ, visando combater doenças rurais endêmicas. Após denúncia na mídia, em 1989, a FEEMA detectou que, com a desativação da fábrica, foram deixados resíduos da produção dos pesticidas, causando a contaminação do solo. Neste trabalho foram realizadas análises foliares e de solo em dois talhões de espécies de eucalipto (Eucalyptus grandis e Corymbia citriodora (Hook. K.D. Hill & L.A.S. Jhonson, com o objetivo de avaliar o potencial da espécie como fitorremediador de área contaminada por organoclorados. Coletaram-se cinco amostras compostas de folhas (três do C. citriodora e duas do E. grandis e uma composta de solo em cada um dos talhões estudados para análise de organoclorados por cromatografia gasosa. As alturas médias dos talhões de E. grandis e C. citriodora foram, respectivamente, de 9,1 e 16,8 com diâmetros médios de 7,8 e 15,95 cm; a média de C. citriodora foi similar à de outros plantios em regiões de mata atlântica, ficando a de E. grandis pouco abaixo. Detectou-se a presença de organoclorados nas folhas analisadas, porém em baixas concentrações. Nos solos, as concentrações encontradas foram altas, sendo maiores no talhão de E. grandis. Os resultados foram comparados com análises prévias na área, indicando que as espécies atuaram como fitorremediadoras, especialmente o C. citriodora, uma vez que houve redução na contaminação do solo e absorção dos organoclorados pelas folhas.The Malaria National Service built a factory of organoclorine pesticides used in public health campaigns (HCH and DDT between 1950 and 1965, at Cidade dos Meninos, in the municipal district of Duque de Caxias/RJ to control the dissemination of endemic rural diseases. After a media outcry, in 1989, FEEMA

  7. Meiobenthic and Macrobenthic Community Structure in Carbonate Sediments of Rocas Atoll (North-east, Brazil)

    Science.gov (United States)

    Netto, S. A.; Warwick, R. M.; Attrill, M. J.

    1999-01-01

    Rocas is the only atoll of the South Atlantic and it is built almost exclusively by coralline red algae, vermetid gastropods and encrusting foraminiferans. Patterns in the community structure of meiofauna and macrofauna, particularly nematodes and polychaetes, at Rocas Atoll, north-east Brazil, are determined and compared for different habitats: sublittoral, tidal flat, reef pools and lagoon. Nematodes and copepods were the most abundant meiofaunal taxa. In all studied habitats at Rocas Atoll, oligochaetes, nematodes and polychaetes numerically dominate the macrofauna. Univariate and multivariate analyses reveal clear differences in community structure between the habitats of the atoll, especially between the sublittoral and the inner habitats. The number of species, total density, diversity (H') and trophic structure vary significantly between the habitats, but the differences are dependent on which faunistic category (meiobenthic or macrobenthic) is analysed. Nematodes belonging to the Epsilonematidae and Draconematidae, together with a diverse community of meiobenthic polychaetes, characterize the sublittoral habitat of Rocas Atoll. Both meiofauna and macrofauna are depressed in the tidal flat, and the local sediment instability particularly affects the polychaete abundance. Reef pools and lagoons support a very dense aggregation of invertebrates, particularly the macrofauna, when compared with other carbonate reef sediments. However, differences in the structure of meiofauna and macrofauna communities between reef pools and lagoons are not significant. Changes in meiobenthic and macrobenthic community structure are related to the gradation in the physical environment of the atoll.

  8. Historical accumulation of Trace elements in sediment cores from Tiete river, Sao Paulo, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Damatto, S.; Rocha, F.; Baumgardt, D.; Martins, L.; Silva, P.; Favaro, D. [IPEN-CNEN (Brazil)

    2014-07-01

    Tiete River, with 1100 km of extension, is one of the most economically important river of the state of Sao Paulo, Brazil and throughout its length can be found reservoirs formed by damming its waters. This river is considered one of the most polluted rivers in the world, especially when it passes through the city of Sao Paulo. As a result of pollution observed since the 1950's, a project was established with the aim of evaluating the historic concentration of the trace elements As, Ba, Br, Ca, Ce, Co, Cr, Cs, Eu, Fe, Hf, La, Lu, Na, Nd, Rb, Sb, Sc, Sm, Ta, Tb, Th, U, Yb and Zn (mg.kg{sup -1}), in sediment cores dated by {sup 210}Pb method, sampled is several points of the river, since its source in Salesopolis up the mouth, on the Parana River. This work presents the results obtained by the trace elements above determined in two sediment cores collected in reservoirs in the city of Salesopolis and Pirapora do Bom Jesus. The analytical techniques used for the analysis were instrumental neutron activation analysis and gross beta measurement, respectively. The results obtained for the elements Br, Ce, Cr, Cs, Eu, Nd, Sb, Sm, Th and U are higher than the values of Upper Continental Crust and the sedimentation rate obtained for the reservoir in Salesopolis, 1.53 cm.y{sup -1}, suggest silting processes. The enrichment factor and the geo-accumulation index were used to assess the presence of anthropogenic sources of pollution. Document available in abstract form only. (authors)

  9. Estrutura e composição florística do estrato arbóreo em duas zonas altitudinais na Mata Atlântica de encosta da região do Imbé, RJ Structure and floristic composition of tree communities in two altitudinal zones in an Atlantic forest in the Imbé Region, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Marcel R. Moreno

    2003-09-01

    Full Text Available O objetivo deste estudo foi avaliar a composição florística e estrutural do estrato arbóreo de um remanescente de mata atlântica submontana na Região do Imbé, RJ, testando a hipótese de que diferenças em altitude (zona 1 localizada a 50m.s.m. e zona 2 localizada a 250m.s.m. acarretam alterações na comunidade. O total de dez parcelas de 30×40m foram alocadas em duas zonas altitudinais, cinco no sítio 1 e outras cinco no sítio 2. Todas as árvores com DAP > 10cm foram marcadas e medidas. Dentre os 940 indivíduos amostrados, um total de 210 espécies foram identificadas, distribuídas em 158 gêneros e 43 famílias. As duas zonas estudadas apresentaram valores semelhantes de densidade total, área basal total e diversidade de espécies. Os valores de diversidade de espécies estão entre os mais altos encontrados em Mata Atlântica. A família Euphorbiaceae apresentou os maiores valores de VC em ambas as zonas altitudinais. A família mais rica em número de espécies foi Leguminosae (26 espécies. Das 210 espécies amostradas, apenas 57 foram comuns às duas zonas amostradas. Na zona 1, as espécies com os maiores VC foram Hyeronima alchorneoides Allemão (14,3, Actimostemon verticilatus (Kl. Baill. (11,4 e Rustia formosa (Cham. & Schltal. Klotzch (10,7, enquanto que para a zona 2, foram Actimostemon verticilatus (13,8, Euterpe edulis Mart. (12,4 e Mabea fistulifera Mart. (8,1. Os resultados indicaram que a composição florística mudou em função da altitude, mas não a estrutura da floresta e a diversidade de espécies.The Imbé is one of the main Atlantic forest remnants in the Rio de Janeiro State. The aim of this study was to test whether differences in forest structure and floristic composition exist between two tree communities at different altitudes (site 1 at 50m high and site 2 at 250m high. Five plots of 30m×40m (1200m² were setup in each site. All trees with DBH > 10cm were tagged and measured. A total of 210 species

  10. Integrated quality assessment of sediments from harbour areas in Santos-São Vicente Estuarine System, Southern Brazil

    Science.gov (United States)

    Buruaem, Lucas Moreira; de Castro, Ítalo Braga; Hortellani, Marcos Antonio; Taniguchi, Satie; Fillmann, Gilberto; Sasaki, Silvio Tarou; Varella Petti, Mônica Angélica; Sarkis, Jorge Eduardo de Souza; Bícego, Márcia Caruso; Maranho, Luciane Alves; Davanso, Marcela Bergo; Nonato, Edmundo Ferraz; Cesar, Augusto; Costa-Lotufo, Leticia Veras; Abessa, Denis Moledo de Souza

    2013-09-01

    Santos-São Vicente Estuarine System is a highly populated coastal zone in Brazil and where it is located the major port of Latin America. Historically, port activities, industrial and domestic effluents discharges have constituted the main sources of contaminants to estuarine system. This study aimed to assess the recent status of sediment quality from 5 zones of Port of Santos by applying a lines-of-evidence approach through integrating results of: (1) acute toxicity of whole sediment and chronic toxicity of liquid phases; (2) grain size, organic matter, organic carbon, nitrogen, phosphorus, trace metals, polycyclic aromatic hydrocarbons, linear alkylbenzenes and butyltins; (3) benthic community descriptors. Results revealed a gradient of increasing contamination for metals and organic compounds, alongside with their geochemical carriers. Sediment liquid phases were more toxic compared to whole sediment. Low number of species and individuals indicated the impoverishment of benthic community. The use of site-specific sediment quality guidelines was more appropriate to predict sediment toxicity. The integration of results through Sediment Quality Triad approach and principal component analysis allowed observing the effects of natural stressors and dredging on sediment quality and benthic distribution. Even with recent governmental efforts to control, pollution is still relevant in Port of Santos and a threat to local ecosystems.

  11. Variations of Bacterial Community Structure and Composition in Mangrove Sediment at Different Depths in Southeastern Brazil

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    Lucas William Mendes

    2014-12-01

    Full Text Available Tropical mangroves are considered one of the most productive ecosystems of the world, being characterized as nurseries and food sources for fish and other animals. Microorganisms play important roles in these environments, and the study of bacterial communities is of paramount importance for a better comprehension of mangrove dynamics. This study focused on the structure and composition of bacterial communities in mangrove sediments at different depths and points, located in Southeastern Brazil. Terminal Restriction Fragment Length Polymorphism (T-RFLP was used to determine the community structure, and 16S rRNA gene pyrosequencing was used to characterize the community composition. Redundancy analysis of T-RFLP patterns revealed differences in bacterial community structure according to soil attributes and depth. The parameters K and depth presented significant correlation with general community structure. Most sequences were classified into the phylum Proteobacteria (88%, which presented differences according to the depth, where the classes Betaproteobacteria (21% and Deltaproteobacteria (16% were abundant at 10 cm and Epsilonproteobacteria (35% was abundant at 40 cm depth. Clear differences were observed in community composition as shown by the differential distribution of the phyla Firmicutes (1.13% and 3.8%, for 10 cm and 40 cm respectively, Chloroflexi (2.8% and 0.75%, and Acidobacteria (2.75% and 0.57% according to the depth. Bacterial diversity measurements indicated higher diversity in shallow samples. Taken together, our findings indicate that mangrove holds a diverse bacterial community, which is shaped by the variations found in the ecosystem, such as sediment properties and depth.

  12. Prevalência de transtornos psiquiátricos em jovens infratores na cidade do Rio de Janeiro (RJ, Brasil: estudo de gênero e relação com a gravidade do delito Prevalence of psychiatric disorders in juvenile offenders in the city of Rio de Janeiro (RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Renata Candido de Andrade

    2011-04-01

    Full Text Available Cresce no Brasil a prevalência de jovens infratores, principalmente do gênero feminino. A literatura aponta para prevalências aumentadas de transtornos mentais entre esses jovens em vários países, mas no Brasil faltam estudos. O objetivo é avaliar a prevalência de transtornos mentais em adolescentes sob medida socioeducativa, considerando como hipótese sua diferença entre gêneros com base no tipo de delito cometido. O instrumento usado foi o K-SADS-PL. Como resultados, alta prevalência de transtornos psiquiátricos entre adolescentes infratores, sendo os mais prevalentes: transtorno de déficit de atenção com hiperatividade (33%, transtorno da conduta (77%, transtorno desafiador opositivo (50%, transtornos de ansiedade (70%, transtorno depressivo (50%, abuso de drogas ilícitas (70% e abuso de álcool (52%. O abuso de álcool aumentou em 2,4 vezes a chance de um adolescente cometer delito violento. Esses dados sugerem às autoridades em saúde pública que tanto a detecção quanto o tratamento precoce de transtornos psiquiátricos na infância podem ajudar na prevenção de atos infratores. Sugerem também que o tratamento em saúde mental dos jovens sob custódia da lei deve ser parte fundamental da recuperação e da ressocialização deles.The prevalence of juvenile offenders in Brazil, mainly among young females, is on the increase. The literature on this issue indicates an increased incidence of mental disorders among young offenders in several countries, though studies in Brazil are lacking. The aim of this article is to study the prevalence of mental disorders in adolescents from a socio-educational standpoint, taking as a hypothesis the gender difference and the type of offense committed. The instrument used was the K-SADS-PL. As results, we found a high prevalence of psychiatric disorders among juvenile offenders, the most common being: attention deficit hhyperactivity disorder (33.3%; behavioral disorder (77

  13. A reevaluation of the late quaternary sedimentation in todos os Santos Bay (BA, Brazil

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    GUILHERME C. LESSA

    2000-12-01

    Full Text Available Todos os Santos Bay is a large ( 1000 km², structurally controlled tidal bay in northeast Brazil. Three main drainage basins debouch into the bay, providing a mean freshwater discharge of 200 m³/s (prior to 1985, or less than 1% of the spring tidal discharge through the bay mouth. Based on the result of several sedimentological studies performed in the 1970's, five surface sedimentary facies were identified inside the bay, namely i transgressive siliciclastic marine sand facies; ii transgressive bay sand-mud facies; iii a transgressive carbonate marine sand facies; iv regressive bay-mud facies, and v regressive fluvial sand facies. The spatial distribution of these facies would follow, somewhat closely, the hydrodynamic-energy distribution inside the bay. Seismic profiles along the bay bottom indicate the existence of several paleochannels, 5-10 m deep, blanketed at least by three different sedimentary units. The topmost sedimentary unit, 5-20 m thick, appears to be associated with the regressive bay-mud facies, and assuming that it was laid down within the last 5000 years, sedimentation rates for the central and northeastern part of the bay would average at 2,4 mm/y.

  14. Organic micropollutants on river sediments from Rio de Janeiro State, Southeast Brazil

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    João Paulo Machado Torres

    2002-04-01

    Full Text Available The paper is a contribution for the knowledge upon concentrations and fate of different kinds of organic micropollutants in Tropical River system from a very industrialized region in Brazil. The presented data was obtained during three years of an International Research Project between Brazilian and Dutch institutions. The sediments were sampled at the Paraiba do Sul-Guandu river watershed, the most important watercourse of Rio de Janeiro state, where up 90 % of the population depends on its water for domestic uses. After extraction with non-polar solvents in a hot sohxlet device and clean up using chromatographic columns, three classes of organic micropollutants were analyzed: organochlorine insecticides (OCs, polychlorinated biphenyls (PCBs and polynuclear aromatic hydrocarbons (PAHs. The organochlorines, including the PCBs were scarcely present in the collected samples probably reflecting the restrictions of use of this class of compounds in the Brazilian market. However, the PAHs levels were high at the vicinity of a huge steelworks located in the city of Volta Redonda. This contamination is probably due to the massive use of coal in the above-cited metallurgical plant.

  15. Organic micropollutants on river sediments from Rio de Janeiro State, Southeast Brazil

    Directory of Open Access Journals (Sweden)

    Torres João Paulo Machado

    2002-01-01

    Full Text Available The paper is a contribution for the knowledge upon concentrations and fate of different kinds of organic micropollutants in Tropical River system from a very industrialized region in Brazil. The presented data was obtained during three years of an International Research Project between Brazilian and Dutch institutions. The sediments were sampled at the Paraiba do Sul-Guandu river watershed, the most important watercourse of Rio de Janeiro state, where up 90 % of the population depends on its water for domestic uses. After extraction with non-polar solvents in a hot sohxlet device and clean up using chromatographic columns, three classes of organic micropollutants were analyzed: organochlorine insecticides (OCs, polychlorinated biphenyls (PCBs and polynuclear aromatic hydrocarbons (PAHs. The organochlorines, including the PCBs were scarcely present in the collected samples probably reflecting the restrictions of use of this class of compounds in the Brazilian market. However, the PAHs levels were high at the vicinity of a huge steelworks located in the city of Volta Redonda. This contamination is probably due to the massive use of coal in the above-cited metallurgical plant.

  16. Multielemental characterization of sediments from rivers and reservoirs of a sediment quality monitoring network of Sao Paulo state, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Walace A.A.; Quinaglia, Gilson A., E-mail: wasoares@sp.gov.br, E-mail: gquinaglia@sp.gov.br [Companhia Ambiental do Estado de Sao Paulo (CETESB), SP (Brazil). Setor de Analises Toxicologicas; Favaro, Deborah I.T., E-mail: defavaro@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (LAN/CRPq/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao Neutronica

    2013-07-01

    The Environment Company of the State of Sao Paulo (CETESB) by means of its quality monitoring network does, systematically, the assessment of water and sediment quality in rivers and reservoirs in the Sao Paulo state. The quality evaluation is done by means 50 parameters in water and 63 for sediment that are considered the more representative for CETESB monitoring. In 2011 the network monitoring analyzed 420 points being 24 in sediments. In the present study the multielemental characterization (total concentration) of 13 sediment samples from 24 rivers and reservoirs belonging to the CETESB monitoring network were analyzed by instrumental neutron activation analysis (INAA). The analytical validation according to precision and accuracy was checked through certified reference materials analyzes BEN (Basalt-IWG-GIT), SL-1 (Lake Sediment - IAEA) and Soil-5 (IAEA), that presents certified concentration values for all elements analyzed. The results obtained for multielemental characterization were compared to NASC values (North American Shale Composite) and the enrichment factor (EF) by using Sc as a normalizer element was calculated. The results showed higher enrichment values for As, Br, Cr, Hf, Ta, Th , U and Zn and rare earth elements (REE) Ce, Eu, La, Nd, Sm, Tb and Yb in many of the tested sediment samples indicating that there may be an anthropogenic contribution for these elements. The multielemental results were also compared to the granulometric composition of the sediment samples. Factorial and Cluster Analysis were applied and indicated that the elements distribution is controlled, mainly by the granulometric fractions of the sediments. (author)

  17. Radionuclides used in nuclear medicine ({sup 131}I, {sup 99m}Tc e {sup 99}Tc) in sewage system and in the marine environment of Rio de Janeiro city, RJ, Brazil; Radionuclideos usados em medicina nuclear ({sup 131}I, {sup 99m}Tc e {sup 99}Tc) no sistema de esgoto e no ambiente marinho da cidade do Rio de Janeiro, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Daniele Santos de

    2014-08-01

    The nuclear medicine is a specialty that uses radioisotopes for diagnostic or therapeutic purpose. In Brazil there are around 340 Nuclear Medicine Services (NMS), 27 of them, are located in the city of Rio de Janeiro. The most widely used radionuclides in the country are {sup 131}I and {sup 99m}Tc. The radionuclide {sup 99m}Tc decays to {sup 99}Tc, which is a beta emitter with a long half-life (10{sup 5} years). The aim of this study is to perform a survey to estimate the {sup 131}I and {sup 99}Tc discharged levels at the Canal do Cunha, the main pathways for environmental dispersion and evaluate the radiological impact to non-human biota and to the populations exposed to these radionuclides. The Alegria Station receives sewage from most clinics of Rio de Janeiro mid was therefore chosen as a study case. The station receives approximately 4.50 x 10{sup 5} Bq/year of {sup 99}Tc e 7.12 x 10{sup 12} Bq/year of {sup 131}I. After passing through all stages of treatment, the effluent is discharged into the Canal do Cunha and flows into the Guanabara Bay. To assess the radiological impact of these radionuclide discharges, a comparative study was made considering three computational models: the CROM, which is based on a model of the International Atomic Energy Agency (IAEA), the PC-CREAM, widely used by the European Union and the GENII, which is the most widely used model in the United States. Two exposure scenarios were considered: 1 - people that bathe directly in the discharge of the effluent; 2 - community living 1200 meters from the discharge point, bathing in the river and consuming local fish. Concentration and doses values for the scenarios according to the applicability of each computer code were estimated. The dose values at the discharge point were 7.47 x 10{sup -6}mSv for {sup 131}I and 2.87 x 10{sup -14} mSv for {sup 99}Tc, while for scenario II the value of the total dose was approximately 10{sup -1} mSv/year for {sup 131}I and 10{sup -10} mSv/year for {sup

  18. Impacto das atividades profissionais na saúde física e mental dos policiais civis e militares do Rio de Janeiro (RJ, Brasil The impact of professional activities on the physical and mental health of the civil and military police of Rio de Janeiro (RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Maria Cecília de Souza Minayo

    2011-04-01

    Full Text Available Neste artigo, analisamos o adoecimento físico e mental de policiais civis e militares do Estado do Rio de Janeiro, segundo condições de trabalho e atividades profissionais. Utilizamos a mesma metodologia para o estudo de duas categorias: abordagem quantitativa (amostragem aleatória simples por conglomerados, alcançando um total de 1.458 policiais civis e 1.108 policiais militares que responderam a questionários anônimos e abordagem qualitativa (grupos focais com 143 profissionais e 18 entrevistas com gestores de ambas as polícias. Os dados aqui apresentados são todos originais. Constatamos sobrepeso e obesidade em especial na Polícia Militar; e precária frequência de atividade física e informação de elevados níveis de colesterol, especialmente na Polícia Civil. Dores no pescoço, nas costas ou na coluna, problemas de visão, dores de cabeça e enxaquecas foram os principais problemas encontrados. A presença de lesões físicas permanentes foi relatada por 16,2% dos membros das duas corporações, sendo mais relevantes entre os militares, que também apresentam mais elevada frequência de sofrimento psíquico (SRQ-20. Enfatizamos a necessidade de mudanças nas dimensões individual e profissional e nos aspectos institucionais referentes às condições e à organização do trabalho e dos serviços de saúde.In this article, we analyze the physical and mental stress and illness of military and civil police force officers in the State of Rio de Janeiro (Brazil due to their working conditions and professional activities. The same methodology was used for the study of two categories, namely a quantitative approach (simple random sampling by conglomerates, involving a total of 1,458 civil police officers and 1,108 military police officers, who answered questionnaires anonymously and a qualitative approach (focal groups involving 143 professionals and 18 interviews with managers of both police forces. The data presented here are all

  19. Metal and trace element sediment assessment from Salto Grande reservoir, Sao Paulo state, Brazil, by instrumental neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Walace A.A., E-mail: walace@usp.br [Setor de Analises Toxicologicas. CETESB, Sao Paulo, SP (Brazil); Favaro, Deborah I.T., E-mail: defavaro@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao com Neutrons

    2011-07-01

    The Salto Grande Reservoir is used for electric generation, irrigation, fish farming, recreation and water supply for the region's cities. The reservoir belongs to the city of Americana, located in on the eastern region of Sao Paulo State, Brazil. It belongs to the Piracicaba River Hydrographic Basin, the second most important economic and populated region and one of the most polluted areas in the State. This basin is located in a highly industrialized and agricultural region. Due to urban, industrial and agricultural activities as well as sewage wastes the water and sediments of this reservoir and surroundings are extremely contaminated, mainly by metals, according to CETESB (Environmental Control Agency of the Sao Paulo State). In order to obtain better information about its sediment contamination the present study reports results of the concentration of some major (Ca, Fe, K and Na), trace (As, Ba, Br, Co, Cr, Cs, Hf, Rb, Sb, Se, Ta, Th, U, Zn and rare earth (Ce, Eu, La, Lu, Nd, Sc, Sm, Tb and Yb)) elements in sediments and Cd, Cr, Cu, Ni and Pb concentration in sediments and water from the Salto Grande Reservoir. Multielementar analysis was carried out by Instrumental Neutron Activation Analysis (INAA). Multielemental concentrations in the sediment samples were compared to NASC (North American Shale Composite) values. The concentration values for metals As, Cd, Cr, Cu, Pb, Ni and Zn were compared to the Canadian Council of Minister of the Environment (CCME) oriented values (TEL and PEL) and adopted by CETESB, (author)

  20. Qualidade da assistência ao trabalho de parto pelo Sistema Único de Saúde, Rio de Janeiro (RJ, 1999-2001 Calidad de asistencia en el trabajo de parto por el Sistema Único de Salud, Rio de Janeiro (RJ, 1999-2001 Quality assessment of labor care provided in the Unified Health System in Rio de Janeiro, Southeastern Brazil, 1999-2001

    Directory of Open Access Journals (Sweden)

    Maria Inês Couto de Oliveira

    2008-10-01

    Full Text Available OBJETIVO: A qualidade da assistência ao trabalho de parto tem sido reconhecida na prevenção de complicações obstétricas que podem levar à morbi-mortalidade materna, perinatal e neonatal. O objetivo do estudo foi analisar a qualidade da assistência ao trabalho de parto segundo o risco gestacional e tipo de prestador. MÉTODOS: Estudo transversal de observação da assistência ao trabalho de parto de 574 mulheres, selecionadas por amostra estratificada em 20 maternidades do Sistema Único de Saúde do Rio de Janeiro (RJ, entre 1999 e 2001. A qualidade da assistência foi analisada segundo o risco gestacional e o tipo de prestador. Utilizaram-se procedimentos estatísticos de análise de variância e de diferença de proporções. RESULTADOS: Do total da amostra, 29,6% das gestantes foram classificadas como de risco. Apesar da hipertensão ser a causa mais importante de morte materna no Brasil, a pressão arterial não foi aferida em 71,6% das gestantes durante a observação no pré-parto. Em média foram feitas cinco aferições por parturiente, sendo o menor número nos hospitais conveniados privados (média de 2,9. Quanto à humanização da assistência, observou-se que apenas 21,4% das parturientes tiveram a presença de acompanhante no pré-parto, 75,7% foram submetidas à hidratação venosa e 24,3% à amniotomia. O único tipo de cuidado que variou segundo o risco obstétrico foi a freqüência da aferição da pressão arterial, em que as gestantes de risco foram monitoradas o dobro de vezes em relação às demais (média de 0,36 x 0,18 aferições/h respectivamente, p=0,006. CONCLUSÕES: De modo geral, as gestantes de baixo risco são submetidas a intervenções desnecessárias e as de alto risco não recebem cuidado adequado. Como conseqüência, os resultados perinatais são desfavoráveis e as taxas de cesariana e de mortalidade materna são incompatíveis com os investimentos e a tecnologia disponível.OBJETIVO: La calidad

  1. LBA-ECO LC-07 Lake Sediment Nutrient Data, Lago Calado, Brazil: 1982-1984

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: This data set reports lake sediment texture and porosity, carbon (C), nitrogen (N), and phosphorus (P) content of surficial sediments, 210Pb-derived...

  2. LBA-ECO LC-07 Lake Sediment Nutrient Data, Lago Calado, Brazil: 1982-1984

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set reports lake sediment texture and porosity, carbon (C), nitrogen (N), and phosphorus (P) content of surficial sediments, 210Pb-derived nutrient...

  3. Integrated sediment quality assessment in Paranaguá Estuarine System, Southern Brazil.

    Science.gov (United States)

    Choueri, R B; Cesar, A; Torres, R J; Abessa, D M S; Morais, R D; Pereira, C D S; Nascimento, M R L; Mozeto, A A; Riba, I; DelValls, T A

    2009-10-01

    Sediment quality from Paranaguá Estuarine System (PES), a highly important port and ecological zone, was evaluated by assessing three lines of evidence: (1) sediment physical-chemical characteristics; (2) sediment toxicity (elutriates, sediment-water interface, and whole sediment); and (3) benthic community structure. Results revealed a gradient of increasing degradation of sediments (i.e. higher concentrations of trace metals, higher toxicity, and impoverishment of benthic community structure) towards inner PES. Data integration by principal component analysis (PCA) showed positive correlation between some contaminants (mainly As, Cr, Ni, and Pb) and toxicity in samples collected from stations located in upper estuary and one station placed away from contamination sources. Benthic community structure seems to be affected by both pollution and natural fine characteristics of the sediments, which reinforces the importance of a weight-of-evidence approach to evaluate sediments of PES.

  4. Sediment grain size distribution and heavy metals determination in a dam on the Paraná River at Ilha Solteira, Brazil.

    Science.gov (United States)

    Minello, Maria Clara S; Paçó, Ana L; Martines, Marco Antonio U; Caetano, Laercio; Dos Santos, Ademir; Padilha, Pedro M; Castro, Gustavo R

    2009-07-15

    This paper reports on a preliminary evaluation of the grain size distribution of cadmium, lead and copper in sediment from Catarina Beach, Ilha Solteira, in the state of São Paulo, Brazil. Surface sediments were fractionated with sediments organic matter content determined by the loss on ignition was 6.8, 1.7 and 0.6% in the P3, P1 and P2 samples, respectively. The distribution of metal concentrations in sieved sediment followed the order P3 < P2 < P1 thereby suggesting an interaction with organic matter.

  5. Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil

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    Zink Klaus-Gerhard

    2004-01-01

    Full Text Available Freshwater lagoons comprise important coastal ecosystems and natural buffers between urbanized land areas and open ocean in the Rio de Janeiro State, Brazil. Studies of sediment and water chemistry, zooplankton and bacterial communities to assess the extent of anthropogenic disturbance are available. Here we contribute with an organic-geochemical approach supplemented by some microbiological aspects to complete the characterization of these lagoonal ecosystems. Bulk organic matter and extractable lipids (aliphatic hydrocarbons, alcohols and fatty acids, sterols were investigated from two locations per lagoon: at the seaward site and landward ends - and at two depth intervals (0-3 and 3-6 cm per site. Urbanized Imboacica Lagoon received increased anthropogenic input over the most recent years represented by the topmost 3 cm of sediment, whereas deeper sediment layers are less affected by human influence. Eutrophication or nutrient availability favored enhanced algal/cyanobacterial growth. In remote Cabiúnas and Comprida Lagoons pristine conditions are preserved. Organic matter from vascular plants dominates (chain length of free lipids up to C36, which is exceptionally well preserved by acidic lagoonal waters. Differentiation between landward and seaward sites in these two lagoons is less well established due to much smaller surface/volume to catchment ratios. No anthropogenic influences are yet detectable in sediments of Cabiúnas and Comprida Lagoons.

  6. Using an integrated approach to assess the sediment quality of an estuary from the semi-arid coast of Brazil.

    Science.gov (United States)

    Souza, Ivanildo Surini; Araujo, Giuliana Seraphim; Cruz, Ana Carolina Feitosa; Fonseca, Tainá Garcia; Camargo, Julia Beatriz Duarte Alves; Medeiros, Guilherme Fulgêncio; Abessa, Denis M S

    2016-03-15

    The Jundiaí-Potengi Estuary (JPE) on the semi-arid coast of Brazil is influenced by multiple sources of pollution. Sediment quality at 10 JPE sites was evaluated through an integrated approach. Rainy and dry seasons were considered. Collected sediments were analyzed for texture, metal, nitrogen, phosphorus concentrations, and toxicity to invertebrates. Geochemical and ecotoxicological data were integrated using qualitative approaches and multivariate techniques. We observed decreased sediment quality in both seasons, particularly in the mid-estuary. In the dry season, the contamination-toxicity relationship was clearer, as hydrological conditions favor contaminant retention within the estuary. Rainy season conditions were found to be worse, since stormwater drainage from agricultural and urban areas carries the contamination into the estuary. Because of the contamination sources and dissolved and particle-bound metal transport, contamination and toxicity did not correlate as clearly in the rainy season. The results suggest that unmeasured contaminants are contributing to JPE sediment degradation. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. Mercury in litterfall and sediment using elemental and isotopic composition of carbon and nitrogen in the mangrove of Southeastern Brazil

    Science.gov (United States)

    Fragoso, Cynara Pedrosa; Bernini, Elaine; Araújo, Beatriz Ferreira; Almeida, Marcelo Gomes de; Rezende, Carlos Eduardo de

    2018-03-01

    Mercury and elemental and isotopic compositions of carbon and nitrogen were determined in litterfall and sediments from the mangrove of the Paraíba do Sul River, Rio de Janeiro, Brazil. Total mercury (THg) and monomethylmercury (MMHg) concentrations in sediment ranged from 33 to 123 ng g-1 and 0.20-1.38 ng g-1, respectively. The δ13C in sediment varied from -29.4 to -26.5‰ and from 2.4 to 5.8‰ in δ15N. The THg concentration in litterfall and its annual input to the mangrove was 21 ± 2 ng g-1 and 16 ± 4 μg m-2 for the species Laguncularia racemosa, 18 ± 1 ng g-1 and 17 ± 3 μg m-2 for Rhizophora mangle, and 53 ± 4 ng g-1 and 33 ± 4 μg m-2 for Avicennia germinans, respectively. The isotopic composition of leaf litter ranged from -28.6 to -26.9‰ for δ13C and 4.5-7.2‰ for δ15N. Both the highest annual Hg input via litterfall and highest sediment Hg concentration were observed in areas dominated by A. germinans. These results suggest that the rate of litterfall of plant species and the atmospheric deposition have played an important role in the Hg biogeochemical cycle in the mangrove ecosystem.

  8. Quantifying the main sediment sources in agricultural landscapes of Southern Brazil cultivated with conventional and conservation practices

    Science.gov (United States)

    Evrard, Olivier; Le Gall, Marion; Tiecher, Tales; Gomes Minella, Jean Paolo; Laceby, J. Patrick; Ayrault, Sophie

    2017-04-01

    Agricultural expansion that occurred in the 1960s in Southern Brazil significantly increased soil erosion and sediment supply to the river networks. To limit the deleterious impacts of soil erosion, conservation practices were progressively implemented in the 1990s, including the direct sowing of crops on a soil densely covered with plant residues, contour farming, the installation of ponds to trap sediment in the landscape and the use of crop rotations. However, there remains a lack of observational data to investigate the impact of these conservation practices on soil erosion and sediment supply. This data is crucial to protect soil resources and maintain the sustainability of food production systems in this region of the world characterized by a rapidly increasing population. Accordingly, sediment sources were investigated in the Guaporé catchment (2,032 km2) representative of the cultivated environments found in this part of the world. In the upper catchment, the landscape is characterized by gentle slopes and deep soils (Ferralsols, Nitisols) corresponding to the edge of the basaltic plateau. Soybean, corn and wheat under direct sowing are the main crops in this area. In contrast, steep and shallow soils (Luvisols, Acrisols, Leptosols) highly connected to the rivers are found in the lower catchment, where tobacco and corn fields are cultivated with conventional ploughing. These soil types were characterized by elemental geochemistry and 87Sr/86Sr ratios. Sediment sources were then modelled using the optimal suite of properties (87Sr/86Sr ratios, K, Ti, Co, As, Ba, and Pb). The results demonstrate that sediment collected at the catchment outlet during two hydrological years (2012-2014) mainly originated from downstream soils (Luvisols, Acrisols, Leptosols; 92±3%), with this proportion remaining stable throughout the monitoring period. This research indicates that conservation practices implemented in the upper catchment are effective and that similar methods

  9. Shallow gas accumulation in sediments of the Patos Lagoon, southern Brazil

    Directory of Open Access Journals (Sweden)

    Jair Weschenfelder

    2006-09-01

    Full Text Available A high resolution seismic survey was conducted in the Patos Lagoon, southern Brazil, aboard of the research vessel LARUS of the Fundação Universidade Federal do Rio Grande (FURG. Around 400 km of 3.5 kHz seismic profiles were collected, which provided acoustic signals of good penetration depth and resolution. Seismic anomalies, including turbidity and pocket gas, revealed that gas-charged sediments are common in several areas of the lagoon. The gas accumulations in the Patos Lagoon are controlled by the spatial distribution of the sedimentary facies. Either in 'curtains' or in 'acoustic turbid zones', the main gas accumulations occur in areas with paleotopographic lows related to fluvial channels and valleys developed in the Rio Grande do Sul coastal plain during regressive/transgressive events of the Quaternary.Um levantamento sísmico de alta resolução foi realizado na Lagoa dos Patos, sul do Brasil, a bordo da Lancha Oceanográfica Larus da Fundação Universidade Federal do Rio Grande (FURG. Foram levantados aproximadamente 400 km de perfis de 3,5 kHz, os quais apresentaram uma resposta acústica de boa penetração e resolução. Anomalias sísmicas, incluindo turbidez acústica e bolsões de gás, revelam que sedimentos carregados de gás são comuns em diversas áreas do corpo lagunar. As acumulações de gás na Lagoa dos Patos são controladas pela distribuição espacial das fácies sedimentares. Tanto as acumulações de gás na forma de 'cortinas', como as 'zonas acusticamente turvas', ocorrem em área de baixios paleotopográficos, vinculados a vales e canais fluviais que se desenvolveram na planície costeira do Rio Grande do Sul durante os eventos regressivos/transgressivos do Quaternário.

  10. Sediment provenance and dispersal on tropical starved continental margins: Example of the Potiguar Basin margin, NE Brazil

    Science.gov (United States)

    Vital, H.; Gomes, M. P.; Dantas, E. L.; Soares, C. H.

    2013-12-01

    Mesozoic and Cenozoic rocks from the Potiguar Basin have been investigated to determine the provenance of terrigenous and carbonate sediments on the Brazilian Continental shelf offshore of the Acu River. Located in the northern coast of the Rio Grande do Norte State (NE Brazil), the Acu River is submitted to highly dynamic coastal processes, such as mesotidal regime (up to 2.6 m), waves, winds and currents. It is inserted in the geological context of Potiguar Basin and is the largest source of freshwater in this area, as the biggest hydrographic basin. Bottom sediments characterization, including heavy mineral and Nd isotopes studies, associated with an integrated shallow water geophysical investigation was carried out on this area, The integration between currents velocity, particles transported by the current of water and other physical parameters with bedforms characterization and different sedimentary textures in the study area allows a better knowledge of the active sedimentary processes, which are responsible for the formation of morphologic features of this area. The distribution patterns of the principal heavy minerals indicate the major point sources of sediment supply onto the shelf and reveal intensive mixing, sorting processes and that a westerly (E-W) longshore current plays an important role in the sediment dispersal. As a result, the mineral distribution E of the Acu River is rich in stable heavy minerals (mainly zircon and tourmaline) whilst of the Acu River is rich in unstable ones (mainly hornblende and epidote.). In addition to provenance-induced variability, mineralogical differences between E and W provinces could indicate that environmental processes have contributed to the total variability of the inner continental shelf sediments. The Sm-Nd isotopic signatures of the rocks yielded model ages (TDM) in the range of 2,19-2,88 Ga, indicating archean to paleoproterozoic sources from the basement. The terrigenous sediments yielded model ages (TDM

  11. Geoacoustic character, sedimentology and chronology of a cross-shelf Holocene sediment deposit off Cabo Frio, Brazil (southwest Atlantic Ocean)

    Science.gov (United States)

    Mendoza, Ursula; Ayres Neto, Arthur; C. Abuchacra, Rodrigo; Fernandes Barbosa, Cátia; G. Figueiredo, Alberto; C. Gomes, Manoela; Belem, Andre L.; Capilla, Ramsés; S. Albuquerque, Ana Luiza

    2014-08-01

    The Cabo Frio region in the state of Rio de Janeiro, southeast coast of Brazil, is characterized by a local coastal upwelling system and converging littoral sediment transport systems that are deflected offshore at Cabo Frio, as a consequence of which a thick cross-shelf sediment deposit has developed over time. To investigate the evolution of this muddy deposit, geophysical, sedimentological and geochemical data from four sediment cores (3.8-4.1 m in length) recovered in water depths between 88 and 141 m were analyzed. The high-resolution seismic data show variable sediment thicknesses ranging from 1 to 20 m, comprising two sedimentary units separated by a high-impedance layer at a depth of about 10 m below the seafloor at the coring sites. According to the available age datings, the upper sedimentary unit is late Pleistocene to Holocene in age, whereas the lower unit (not dated) must, by implication, be entirely Pleistocene in age. The boomer-seismic reflection signal can be divided into three echo-types, namely transparent (inner shelf), stratified (middle shelf) and reflective (outer shelf), each type seemingly related to the local sediment composition. The upper 4 m of the upper sedimentary unit is dominated by silty sediment on the middle shelf, and by upward-fining sediments (silty sand to sandy silt) on the inner and outer shelf. The downcore trends of P-wave velocity, gamma-ray density and acoustic impedance are largely similar, but generally reversed to those of water and organic carbon contents. Total organic carbon contents increase with decreasing mean grain size, periodic fluctuations suggesting temporal changes in the regional hydrodynamics and primary productivity fuelled by the local upwelling system. The reconstruction of sedimentation rates in the course of the Holocene is based on 35 AMS age datings of organic material recovered from variable downcore depths. These range from a maximum of 13.3 cm/decade near the base of the inner shelf core (7

  12. Avaliação do anticoncepcional Norplant no Município do Rio de Janeiro, RJ (Brasil An assessment of the use of the contraceptive Norplant in Rio de Janeiro, Brazil

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    Sérgio Koifman

    1987-12-01

    Full Text Available Métodos anticoncepcionais para longo tempo de uso têm sido buscados em vários lugares. O método Norplant é um deles, baseado em cápsulas de levonorgestrel introduzidas no braço das mulheres, através da liberação hormonal diária com efeito de dois a cinco anos. Norplant é produzido sob licença do "Population Council" e industrializado por "Leiras Pharmaceuticals", tendo sido usado na Tailândia, Egito, Indonésia, Suécia, Dinamarca e Brasil. Avaliam-se os resultados deste método, no Município do Rio de Janeiro (Brasil, onde 175 usuárias de Norplant foram entrevistadas em suas casas, e as respostas comparadas com dois grupos-controle (usuárias de pílulas à base de levonorgestrel e usuárias de métodos não-hormonais. Os resultados mostram aumento dos riscos relativos das usuárias de Norplant para desordens menstruais, hipertensão, graves distúrbios de peso e hipertricose, todos estes estatisticamente significantes. Outros achados não significantes foram angina pectoris, encefalopatia hipertensiva, acne e duodenite. Alguns sintomas graves como cefaléia e alterações de comportamento foram mencionados e desapareceram após a retirada das cápsulas. É discutida a relevância de todos os efeitos colaterais em mulheres que decidiram interromper o uso do Norplant. Nestes casos, as medidas de acompanhamento são necessárias, uma vez que hemorragia, ganho de peso acentuado e dificuldades na gravidez podem se desenvolver.Anticonceptional methods for long-term have been searched for in many places. Norplant is one such, based on the use levonorgestrel capsules which introduced into women's arms, produce a daily secretion of hormones and have from two to five years' effect. It is produced under license from the Population Council and industrialised by Leiras Pharmaceutical. It has been used in Thailand, Egypt, Indonesia, Sweden, Denmark and Brazil. It is assessed the results of this method in Rio de Janeiro, where 175 Norplant

  13. Multi-elemental contamination and historic record in sediments from the Santos-Cubatao Estuarine System, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Luiz-Silva, Wanilson [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Inst. de Geociencias; Machado, Wilson [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Dept. de Geoquimica; Matos, Rosa H.R. E-mail: wanilson@ige.unicamp.br

    2008-07-01

    This paper records for the first time the contamination history and identifies the sources of 38 elements in sediments from the Santos-Cubatao Estuarine System (SE Brazil), at one of the most industrialized areas in Latin America. The compositions of samples from a 260 cm long sediment core collected in the Morrao River estuary were determined by ICP-MS. Enrichment factors, principal component analysis, correlation matrixes, and the characterization of geochemical signatures permitted a consistent data evaluation. Contaminant elements such as Cr, Mn, Ni, Zn, Ga, Ag, Cd, Sn, Sb, Pb, and Bi were associated with steel plant-derived Fe concentrations, while Be, Ca, Sc, Co, Cu, Sr, Y, Zr, Nb, Hf, Ta, Th, and U were associated with fertilizer industry-derived P concentrations. An overlap of sedimentary Fe distribution and local steel plant production indicated that Fe is a reliable marker of the contamination history, allowing the estimation of sedimentation rates over a period of 45 years of industrial activities. (author)

  14. Comparação entre métodos de estimativa da evapotranspiração de referência (ETo na região Norte Fluminense, RJ Comparison of estimation methods of reference crop evapotranspiration (ETo for Northeren Region of Rio de Janeiro State, Brazil

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    José C. Mendonça

    2003-08-01

    Full Text Available Este estudo foi desenvolvido na Estação Evapotranspirométrica da UENF, instalada na área da Estação Experimental da PESAGRO-Rio, em Campos dos Goytacazes, RJ. Um lisímetro de pesagem com 6 m² de área, dotado de células de carga, foi instalado no centro de uma área de 900 m², cultivada com grama tipo Batatais (P. notatum L.. O objetivo deste estudo foi propor coeficientes de ajuste regional entre o método lisimétrico e os métodos de Penman-Monteith-FAO, Makkink, Linacre, Jensen-Haise, Hargreaves-Samani, Radiação Solar, Tanque Classe "A"e Atmômetro SEEI modificado para os períodos de 1, 3, 7 e 10 dias. Os resultados obtidos indicam que, com exceção do Atmômetro, todos os métodos avaliados atendem satisfatoriamente à estimativa da ETo na região Norte Fluminense do Estado do Rio de Janeiro, apresentando bons ajustamentos para períodos maiores que sete dias.The aim of this research paper was to make a comparison between the reference values of crop evapotraspiration acquired through the lysimeter and the FAO-modified Penman-Monteith, Solar Radiation, Makkink, Linacre, Jensen-Haise, Hargreaves-Samani, PAN "Class A"and modified SEEI Atmometer methods. Data was obtained from the meteorological station at PESAGRO-Rio, located at Campos dos Goytacazes in the State of Rio de Janeiro State, Brazil. Results have shown that for the northern region of Rio de Janeiro, the methods tend to be well adjusted to the reference values of the crop evapotranspiration as to those obtained through the lysimeter. Nonetheless, good adjustments were obtained for intervals longer than seven-day periods when using the indirect and evaporimeter methods.

  15. (210)Pb and compositional data of sediments from Rondonian lakes, Madeira River basin, Brazil.

    Science.gov (United States)

    Bonotto, Daniel Marcos; Vergotti, Marcelo

    2015-05-01

    Gold exploration has been intensive in Brazilian Amazon over the last 40 years, where the use of mercury as an amalgam has caused abnormal Hg concentrations in water bodies. Special attention has been directed to Madeira River due to fact it is a major tributary of Amazon River and that since 1986, gold exploration has been officially permitted along a 350km sector of the river. The (21)(0)Pb method has been used to date sediments taken from nine lakes situated in Madeira River basin, Rondônia State, and to verify where anthropogenic Hg might exist due to gold exploitation in Madeira River. Activity profiles of excess (21)(0)Pb determined in the sediment cores provided a means to evaluate the sedimentation rates using a Constant Flux: Constant Sedimentation (CF:CS) and Constant Rate of Supply (CRS) of unsupported/excess (21)(0)Pb models. A significant relationship was found between the CF:CS sedimentation rates and the mean values of the CRS sedimentation rates (Pearson correlation coefficient r=0.59). Chemical data were also determined in the sediments for identifying possible relationships with Hg occurring in the area. Significant values were found in statistical correlation tests realized among the Hg, major oxides and Total Organic Carbon (TOC) content in the sediments. The TOC increased in the sediment cores accompanied by a loss on ignition (LOI) increment, whereas silica decreased following a specific surface area raising associated to the TOC increase. The CRS model always provided ages within the permitted range of the (21)(0)Pb-method in the studied lakes, whereas the CF:CS model predicted two values above 140 years. Copyright © 2015 Elsevier Ltd. All rights reserved.

  16. mineração reabilitada na ilha da madeira, Itaguaí, RJ

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    Marcos Paulo Dos Santos Pereira

    2007-01-01

    Full Text Available Ant species richness and diversity may be increased in more complex habitats because they provide more niches and diverse ways of exploiting the environmental resources. Because of the connection between the organisms and habitat characteristics, ants have been used as tools for environmental monitoring of disturbed areas. In this study the structure of the ant community was investigated in plots with different management strategies for the rehabilitation of a mined area at Ilha da Madeira, Itaguaí, RJ, Brazil. A different and richer ant fauna was found in plots with more native tree species than in plots with a low number of tree species or without conservationist management.

  17. Virtual Visit - Pedro II, Duque de Caxias, RJ, Brazil

    CERN Multimedia

    ATLAS Visitor Centre

    2016-01-01

    No contexto da exposição "Exploradores do Conhecimento" estudantes de escolas do Rio de Janeiro, vêem à Universidade Federal do Rio de Janeiro aonde poderão participar em várias atividades, incluindo uma visita virtual ao Experimento ATLAS no CERN, Suíça

  18. Ecotoxicological assessment of water and sediment of the Corumbataí River, SP, Brazil

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    GM. Jardim

    Full Text Available The Corumbataí River drains an economically important area which is mainly represented by the municipalities of Piracicaba and Rio Claro. In view of the impacts caused by the discharge of industrial waste and domestic sewage into the Piracicaba River, the Corumbataí has become increasingly significant as a source of water for the municipality of Piracicaba. However, chemical, physical, and microbiological analyses carried out prior to the present study had already indicated a decline in the quality of the Corumbataí waters. This study aimed to assess, through water and sediment samples, both acute and chronic toxicity to Daphnia magna and Daphnia similis, and to analyze acid-volatile sulfide (AVS and simultaneously extracted metal (SEM in the sediment. Resulting data were intended to be a contribution to future projects for the management and recuperation of this system. To that aim, water and sediment were collected at seven Corumbataí sampling stations in November 2003 and March 2004. Acute toxicity to D. similis was detected in water and sediment samples from the Piracicaba station, located at the mouth of the Corumbataí River. Chronic toxicity was identified in the water or sediment samples of all stations, with the exception of Analândia Montante (upstream, at the head of the river. This was found to affect survival, growth, and fecundity of the test-organisms. The AVS and SEM analyses showed the bioavailability of the metals, thus explaining toxicity found in bioassaying samples of water and sediment. The use of two test-organism species made it possible to obtain a better assessment of the condition of both water and sediment samples of the Corumbataí River.

  19. Violência familiar contra a criança e perspectivas de intervenção do Programa Saúde da Família: a experiência do PMF/Niterói (RJ, Brasil Domestic violence against children and prospects for intervention of the Family Health Program: the experience of the Family Doctor Program/Niterói (RJ, Brazil

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    Pedro Carlos Xavier da Rocha

    2011-07-01

    Full Text Available O objetivo do estudo é estimar a prevalência e caracterizar a Violência Familiar contra Crianças (VFC adscritas ao Programa Médico de Família de Niterói/RJ, discutindo possibilidades de atuação das equipes visando à prevenção, detecção precoce e acompanhamento de famílias em situação de violência. Trata-se de um inquérito de base populacional, com amostra de 278 crianças, selecionadas através de amostragem sistemática, dentre aquelas adscritas a 27 equipes de Saúde da Família. A prevalência de VFC foi estimada utilizando-se a versão nacional da Conflict Tactics Scale Parent-Child (CTSPC. A agressão psicológica ocorreu em 96,7% (IC 95%: 94,7-98,8 dos domicílios. O castigo corporal foi referido por 93,8% (IC 95%: 92,0-96,7 dos respondentes. A violência física menor e a grave foram praticadas por 51,4% (IC 95%: 45,5-57,3 e 19,8% (IC 95%: 15,1-24,5 das famílias, respectivamente. A mãe foi a principal autora de todos os tipos de maus-tratos, embora a maioria das crianças sofra agressões psicológicas e punições corporais por parte de ambos os pais. Diante das altas prevalências e do envolvimento de toda a família nas situações de violência, preconiza-se que o problema seja considerado prioridade na Estratégia Saúde da Família.This study seeks to estimate the prevalence of psychological and physical violence practiced against children in the family environment among clients of the Family Medical Program in Niterói (RJ. It also discloses some potential opportunities for action in the prevention, early detection and monitoring of families experiencing violence. This population-based survey was conducted with face-to-face interviews with parents or legal sponsors of 278 children registered in 27 teams of the Family Health Program. The population studied was randomly selected among children up to ten years of age. The Brazilian version of Parent-Child Conflict Tactics Scales - CTSPC was employed to assess the

  20. Speciation analysis of inorganic antimony in sediment samples from São Paulo Estuary, Bahia State, Brazil.

    Science.gov (United States)

    Silva, Mario Marques; Leao, Danilo Junqueira; Moreira, Ícaro Thiago Andrade; de Oliveira, Olívia Maria Cordeiro; de Souza Queiroz, Antônio Fernando; Ferreira, Sergio Luis Costa

    2015-06-01

    This paper proposes an extraction procedure for the speciation analysis of inorganic antimony in sediment samples using slurry sampling and hydride generation atomic absorption spectrometry. The optimization step of extraction of the species was performed employing a full two-level factorial design (2(3)) and a Box-Behnken matrix where the studied factors in both experiments were: extraction temperature, ultrasonic radiation time, and hydrochloric acid concentration. Using the optimized conditions, antimony species can be extracted in closed system using a 6.0 M hydrochloric acid solution at temperature of 70 °C and an ultrasonic radiation time of 20 min. The determination of antimony is performed in presence of 2.0 M hydrochloric acid solution using HG AAS by external calibration technique with limits of detection and quantification of 5.6 and 19.0 ng L(-1) and a precision expressed as relative standard deviation of 5.6 % for an antimony solution with concentration of 6.0 μg L(-1). The accuracy of the method was confirmed by analysis of two certified reference materials of sediments. For a sample mass of sediment of 0.20 g, the limits of detection and quantification obtained were 0.70 and 2.34 ng g(-1), respectively. During speciation analysis, antimony(III) is determined in presence of citrate, while total antimony is quantified after reduction of antimony(V) to antimony(III) using potassium iodide and ascorbic acid. The method was applied for analysis of six sediment samples collected in São Paulo Estuary (Bahia State, Brazil). The antimony contents obtained varied from 45.3 to 89.1 ng g(-1) for total antimony and of 17.7 to 31.4 ng g(-1) for antimony(III). These values are agreeing with other data reported by the literature for this element in uncontaminated sediment samples.

  1. Cadmium Diagenesis in Polluted Sediments of a Tropical Estuary of SE Brazil

    Science.gov (United States)

    Patchineelam, S. R.; Metzger, E.; Jézéquel, D.; Sarazin, G.; Smoak, J. M.

    2006-12-01

    Sepetiba bay is a shallow semi enclosed water body located about 70km on the west side of the city of Rio de Janeiro with an area of 450km² separated from the Atlantic Ocean by a sand spit. Fishing, shrimp and tourism are important economic activities. During 35 years a Zinc/Cadmium smelter has polluted the bay. The objective of this investigation is to demonstrate how diagenetic processes are responsible for the cadmium remobilization out or fixation into the sediment column.. Two contrasting sites were selected to compare the diagenetic process. P1 located near to the smelter and P2 is about 20km away from the smelter next to a domestic effluents discharge into the bay. Peeper samplers with 25 cells with a resolution of 2,5cm were introduced into the sediment at both sites. After a period of 3 weeks equilibrium, the pore waters were separated from each cell and analyzed within 24 hours for alkalinity, H2S, NH3 and soluble phosphate by conventional methods An ICP-AES spectrometer was used to analyze Na, Mg, Li, Ba, Sr, Si, Fe and Mn. The total and labile Cd in pore waters were determined by differential-pulse stripping voltammetry. The solute profiles have revealed that the sediments at both sites were anoxic. The slopes of the ferrous and sulfide profile constituents permitted characterization the area at P1 as ferrous dominant with oxic conditions in the overlying water and P2 as a sulfidic rich environment with suboxic conditions in the water column. At P1 total dissolved Cd in the overlying water was about 450pM and labile fraction varied from 85 to 177pM. Just below the sediment water interface 695pM of total dissolved Cd was observed. Probably diagenetic processes are responsible for release of cadmium at the sediment interface. Below this maxima Cd concentrations decreased to 30pM. At P2 a concentration o of 150pM of total dissolved Cd was detected in the overlying water and samples in the pore waters at the sediment interface had an average concentration

  2. Potencial para maricultura da carragenófita Hypnea musciformis (Wulfen J.V. Lamour. (Gigartinales - Rhodophyta na Ilha da Marambaia, Baía de Sepetiba, RJ, Brasil Mariculture potential of carragenophyta Hypnea musciformis (Wulfen J.V. Lamour. (Gigartinales - Rhodophyta on Marambaia Island, Baía de Sepetiba, Rio de Janeiro State, Brazil

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    Renata Perpetuo Reis

    2006-12-01

    Full Text Available A falta da prática de cultivo comercial de macroalgas no Brasil junto com a crescente demanda do mercado nacional de ficocolóides é suprida pela importação de algas e colheita em bancos naturais, principalmente na costa nordestina. Na busca de um cultivo em pequena escala para uso das comunidades litorâneas foi implantado um cultivo experimental com H. musciformis, na Ilha da Marambaia, RJ (43º59'35" W e 23º04'00" S. Ao todo foram testadas nove técnicas de fixação da alga nas unidades experimentais de maricultura (UEM. Nos experimentos realizados entre a primavera de 2003 e o outono de 2004, as taxas de crescimento geralmente foram negativas. Entre os invernos de 2004 e 2005, foram na maioria positivas. O fitobentos próximo à UEM foi analisado para verificar o crescimento dessa espécie na assembléia e no cultivo. Observou-se maior percentual de anfípodas e de matéria orgânica nas UEM e a presença de carposporófitos em épocas de baixa salinidade em ambos os locais. Atribuiu-se o baixo rendimento da taxa de crescimento aos fatores ambientais como: ressacas, aderência de matéria orgânica nas algas, herbivoria e danos as UEM por ação antrópica. Constatou-se que o tratamento fixando a muda com abraçadeira foi o de mais fácil manuseio e baixo custo e que somente com a conscientização da comunidade litorânea e remuneração salarial para esta atividade será possível exercer o cultivo de H. musciformis com sucesso.Lack of practice in commercial cultivation of macroalgae in Brazil allied with an increased demand for phycocolloids in the national market is met by importing algae and cropping from natural beds, especially on the Northeastern coast. Seeking to establish small scale cultivation for the use of coastal communities, experimental cultivation was implanted with H. musciformis on Marambaia Island, Rio de Janeiro (43º59'35'' W - 23º04'00'' S. Nine different techniques for fixation of algae to ropes were tested in

  3. Distribuição, probabilidade de ocorrência e período de retorno dos índices de erosividade EI30 e KE>25 em Seropédica - RJ Erosivity indexes EI30 and KE>25 at Seropedica, Rio de Janeiro State, Brazil: distribution, occurrence probability and return period

    Directory of Open Access Journals (Sweden)

    Daniel F de Carvalho

    2010-04-01

    Full Text Available O presente trabalho foi desenvolvido com o objetivo de estudar as características da erosividade da chuva em Seropédica (RJ, quanto à sua distribuição, probabilidade de ocorrência e período de retorno. Para isso, foi utilizada uma série mensal de dados pluviométricos referente ao período de 1973 a 2002 e, com o auxílio de modelos ajustados para a região, foi possível obter os índices mensais e anuais de erosividade EI30 e KE>25. Com base nos resultados obtidos, foi possível concluir que: a os valores médios anuais de EI30 e de KE>25 foram de 5.960,4 MJ mm ha-1 h-1 e de 99,2 MJ ha-1, respectivamente, e estão associados a períodos de retorno de 1,97 ano, com uma probabilidade de ocorrência de 50,82%; e b valores anuais de EI30 da ordem de 5.995; 7.262; 7.684; 7.895; 8.022 e 8.064 MJ mm ha-1 h-1 e de KE>25 da ordem de 99,8; 122,7; 130,3; 134,1; 136,4 e 137,1 MJ ha-1, são esperados, em média, uma vez a cada 2; 5; 10; 20; 50 e 100 anos, respectivamente.This work was carried out in order to study the distribution, the occurrence probability and the return period of the rainfall erosivity in Seropédica city, Rio de Janeiro State, Brazil. It was considered a continuous rain gauges series for the period from 1973 to 2002, and by using specific adjustment models for the region, it was determined the annual and monthly erosivity indexes EI30 and KE>25. With the obtained results, it was possible to conclude that: a the annual erosivity indexes values EI30 and KE>25 were 5,960.4 MJ mm ha-1 and 99.2 MJ ha-1 , respectively, which was expected to occur at least once every 1.97 year, with an occurrence probability of 50.82%; and b annual values EI30 of 5,995; 7,262; 7,684; 7,895 8,022 and8,064 MJ mm ha-1 and annual values KE>25 of 99.8; 122.7; 130.3; 134.1; 136.4 and 137.1 MJ ha-1 are expected at least once every 2; 5; 10; 20; 50 and 100 years, respectively.

  4. Seasonal variation in hospitalizations due to heart failure in Niterói city, Southeastern Brazil Variación estacional en las hospitalizaciones por insuficiencia cardiaca en Niteroi, Sureste de Brasil Variação sazonal nas hospitalizações por insuficiência cardíaca em Niterói, RJ

    Directory of Open Access Journals (Sweden)

    Jose Eduardo Loureiro Jorge

    2009-06-01

    Full Text Available The objective of the study was to describe seasonality of hospitalizations for heart failure in tropical climate as it has been described in cold climates. Seasonal Auto-regressive Integrated Moving-Average model was applied to time-series data of heart failure hospitalizations between 1996 and 2004 in Niteroi (Southeastern Brazil, collected from the Brazilian National Health Service Database. The standard seasonal variation was obtained by means of moving-average filtering and averaging data. The lowest and the highest annual hospital admissions were 507 (1997 and 849 (2002, respectively; the lowest and the highest monthly rates were 419 (December and 681 (October, respectively. Peak admission rates were seen during the fall and winter. Although weak, the seasonality observed indicates that slight variations result in increased hospitalizations for heart failure.El objetivo del estudio fue describir la estacionalidad de las hospitalizaciones por insuficiencia cardiaca en climas tropicales, aspecto ya conocido en climas fríos. Se aplicó el Modelo Estacional Auto-Regresivo Integrado de Promedios Móviles a una serie histórica de 6.596 hospitalizaciones por insuficiencia cardiaca en el municipio de Niteroi, Sureste de Brasil, de 1996 a 2004, obtenida del Banco de Datos del Sistema Único de Salud. La variación estacional estándar fue obtenida por medio de la filtración y cálculo del promedio-móvil de los datos. El menor número de hospitalizaciones por año fue 507 (1997 y el mayor 849 (2002; e por mes 419 (diciembre y 681 (octubre, respectivamente. Se observaron picos de internación en otoño e invierno. A pesar de que fue débil, la estacionalidad observada muestra que una pequeña variación puede llevar al aumento de hospitalizaciones.O objetivo do estudo foi descrever a sazonalidade das hospitalizações por insuficiência cardíaca em climas tropicais, aspecto já conhecido em climas frios. Aplicou-se o Modelo Sazonal Auto

  5. Exposição múltipla a agrotóxicos e efeitos à saúde: estudo transversal em amostra de 102 trabalhadores rurais, Nova Friburgo, RJ Multiple exposure to pesticides and impacts on health: a cross-section study of 102 rural workers, Nova Friburgo, Rio de Janeiro State, Brazil

    Directory of Open Access Journals (Sweden)

    Alberto José de Araújo

    2007-03-01

    Full Text Available Um estudo transversal foi realizado em uma comunidade agrícola localizada em Nova Friburgo, RJ, para conhecer os aspectos epidemiológicos, clínicos e laboratoriais da exposição múltipla a agrotóxicos em uma amostra representativa de 102 pequenos agricultores, de ambos os sexos. Os trabalhadores foram submetidos a um extenso protocolo que incluía aplicação de questionário ocupacional, coleta de amostras biológicas para exame toxicológico e avaliação clínica - geral e neurológica. Os resultados dos exames toxicológicos revelaram episódios leves a moderados de intoxicação aguda aos organofosforados descritos pelos agricultores ou observados durante o exame clínico. Foram também diagnosticados 13 (12,8 % quadros de neuropatia tardia e 29 (28,5% quadros de síndrome neurocomportamental e distúrbios neuropsiquiátricos associados ao uso crônico de agrotóxicos. Os resultados apontam para a ocorrência de episódios recorrentes de sobre-exposição múltipla, a elevadas concentrações de diversos produtos químicos, com grave prejuízo para as funções vitais desses trabalhadores, especialmente por se encontrarem em uma faixa etária jovem (média = 35 ± 11anos e período produtivo da vida. Estes dados demonstram a importância do monitoramento da múltipla exposição a agrotóxicos, uma cadeia de eventos de grande repercussão na saúde pública e para o meio ambiente.A cross section study was carried out in a farming community from Nova Friburgo, Rio de Janeiro state, Brazil, to examine epidemiological, clinical and laboratory aspects of multiple exposure to pesticides in a representative sample of 102 small farmers. Both males and females were submitted to an extensive protocol which included an occupation questionnaire, biological sample collection for toxicology analysis and clinical - general and neurological - evaluation. The toxicology test results showed light to moderate episodes of acute intoxication by

  6. Distribution and origin of hydrocarbons in water and sediment in Sao Sebastiao, SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Zanardi, Eliete [Universidade de Sao Paulo, Instituto Oceanografico, Sao Paulo, SP (Brazil); Bicego, Marcia Caruso; Miranda, Luiz Bruner de; Weber, Rolf Roland [Miami Univ., RSMAS/NAC, Miami, FL (United States)

    1999-04-01

    This study describes the dissolved/dispersed petroleum hydrocarbons (DDPH) in surface water and the origin and distribution of aliphatic and aromatic hydrocarbons in samples from the surface bottom sediments. The main objective was to verify the anthropogenic contribution on the adjacent inner shelf of Sao Sebastiao, taking into account the distribution of hydrographic properties and knowledge of the main circulation. The DDPH concentration range of the 20 samples were from 0.35 to 2.50 {sup m}u{sup g}. L{sup -1}, characterising this region as slightly affected by the contribution of petroleum hydrocarbons. Considering sediment hydrocarbon results, sites located in the inner shelf were divided into three groups: one with mainly biogenic hydrocarbons, a second one with biogenic and petroleum hydrocarbons and a third with significant contribution of petroleum hydrocarbons. These results show an influence of human activities in the Sao Sebastiao Channel on the surrounding areas of the inner shelf. (Author)

  7. Coal extraction causes sediment toxicity in aquatic environments in Santa Catarina, Brazil

    Directory of Open Access Journals (Sweden)

    Lucimaira Amaral de Freitas

    2017-08-01

    Full Text Available This study evaluated water parameters in ponds affected by coal extraction. Allium cepa assay was used to measure genotoxicity/mutagenicity of the sediment. Samples were collected from four ponds in the southern state of Santa Catarina. Water temperature, pH, dissolved oxygen, conductivity and turbidity were measured. Sediments were analyzed for heavy metals. Elutriate samples were prepared at a ratio of 1:4 sediment:water. Allium cepa bulbs were placed in samples prepared from each pond, with ultrapure water used as negative control and methyl methane sulfonate as positive control. Root length, mitotic index, chromosomal aberrations, micronuclei, and nuclear abnormalities were measured. The pH of two ponds, as well as electrical conductivity and dissolved oxygen of all ponds were below the minimum limits set by Brazilian regulation. All heavy metals analyzed were found in all sediment samples, but only Cd concentration was above the legal limit set by Brazilian law. Allium cepa root growth for samples from Ponds 1, 2, and 4 was significantly lower than the negative control. Meristematic cells exposed to elutriate samples showed no significant changes in cell division. There was a significant increase in total chromosomal aberrations in all treated samples in comparison with the negative control. This study demonstrates that even low concentrations of heavy metals can damage exposed biota, possibly due to synergistic effects. We also found the A. cepa bioassay to be a simple and useful tool for genotoxicity/mutagenicity analyses, and recommend its use for environmental monitoring and management in areas influenced by mining activities.

  8. Hydrodynamics and suspended sediment transport in the Camboriú estuary - Brazil: pre jetty conditions

    OpenAIRE

    Eduardo Siegle; SCHETTINI, Carlos A. F.; KLEIN, Antonio H. F.; Toldo Jr.,Elírio E.

    2009-01-01

    Estuarine hydrodynamics is a key factor in the definition of the filtering capacity of an estuary and results from the interaction of the processes that control the inlet morphodynamics and those that are acting in the mixing of the water in the estuary. The hydrodynamics and suspended sediment transport in the Camboriú estuary were assessed by two field campaigns conducted in 1998 that covered both neap and spring tide conditions. The period measured represents the estuarine hydrodynamics an...

  9. Hydrodynamics and suspended sediment transport in the Camboriú estuary - Brazil: pre jetty conditions

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    Eduardo Siegle

    2009-06-01

    Full Text Available Estuarine hydrodynamics is a key factor in the definition of the filtering capacity of an estuary and results from the interaction of the processes that control the inlet morphodynamics and those that are acting in the mixing of the water in the estuary. The hydrodynamics and suspended sediment transport in the Camboriú estuary were assessed by two field campaigns conducted in 1998 that covered both neap and spring tide conditions. The period measured represents the estuarine hydrodynamics and sediment transport prior to the construction of the jetty in 2003 and provides important background information for the Camboriú estuary. Each field campaign covered two complete tidal cycles with hourly measurements of currents, salinity, suspended sediment concentration and water level. Results show that the Camboriú estuary is partially mixed with the vertical structure varying as a function of the tidal range and tidal phase. The dynamic estuarine structure can be balanced between the stabilizing effects generated by the vertical density gradient, which produces buoyancy and stratification flows, and the turbulent effects generated by the vertical velocity gradient that generates vertical mixing. The main sediment source for the water column are the bottom sediments, periodically resuspended by the tidal currents. The advective salt and suspended sediment transport was different between neap and spring tides, being more complex at spring tide. The river discharge term was important under both tidal conditions. The tidal correlation term was also important, being dominant in the suspended sediment transport during the spring tide. The gravitational circulation and Stokes drift played a secondary role in the estuarine transport processes.As trocas de água e materiais através das desembocaduras de estuários são de difícil quantificação e são de fundamental importância para o entendimento do funcionamento de estuários e da zona costeira. A

  10. Historical Records of Combustion Practices Using Molecular and Isotopic Markers in Sediment Profiles Around Rio de Janeiro, Brazil

    Science.gov (United States)

    Lazzari, L.; Carreira, R.; Wagener, A. L.; Boyle, E. A.; Lott, C.; Godoy, J. M.; Massone, C.

    2015-12-01

    The field of combustion processes has transformed lives of mankind throughout history such as the use of wood, initially to produce light and heat; charcoal for using of blast furnaces from the fourteenth century, the coal and petroleum since the time of the Industrial Revolution contribute to the economic growth of many countries. Currently, one of the biggest problems related to combustion processes is connected to the combustion of fossil fuels, due to an increasingly growing of number of vehicles in big cities. The goal of this work is to evaluate the interaction between coastal areas and the Southeast continental shelf of Brazil focusing the exportation of combustion residues from land to ocean and its historical variability. Investigations on the exportation of contaminants such as polycyclic aromatic hydrocarbons (PAHs) and black carbon (BC) from the continent to the ocean; geochronology of the changes in the past through the different uses of combustions and accumulation of contaminants around Southeast of Brazil; advancement in the use of proxies of material transfer in a tropical coastal zone. Three sediment cores were collected, one in highly impacted Guanabara Bay (GB) and other two on the Southeast continental shelf (SB1 and SB2). The sedimentation rate (210Pb) for GB is 3.0 cm year-1 and for SB is 0.17 cm year-1 up to 5 cm and 0.4 cm year-1 up to 15 cm of the cores. Preliminaries results for GB are TOC (3.62±0.28%), BC (0.31±0.04%), TN (0.41±0.04%) and Total PAH (4,519±1,245 ng g-1). For SB1 are TOC (0.72±0.31%), CaCO3 (18.98±2.84%), TN (0.07±0.051%) and Total PAH (10.4±5.4 ng g-1). For SB2 are TOC (0.78±0.1%), CaCO3 (13.9±2.3%), TN (0.08±0.01%) and Total PAH (7.9±3.4 ng g-1). Further analysis such as aliphatic hydrocarbons to identify the source of the OM and 14C will be done to calculate the flux of the compounds through the years.

  11. Enrichment Factors (EF) on Superficial Sediments of Santos Estuarine System, Southeasthern Brazil

    Science.gov (United States)

    Kim, B. S. M.; Salaroli, A. B.; Mahiques, M.; Figueira, R.

    2014-12-01

    The Baixada Santista, located at southeastern Brazilian coast, hosts the largest harbor of South America, it is also the third most heavily populated region in São Paulo state. Many industries and domestic sewage have been contaminating the environment with heavy metals and arsenic since industrial revolution. This has been a major concern worldwide due to its toxicity and persistence. Levels of metals (Al, Cd, Cr, Cu, Ni, Pb, Zn, Fe, Mn, Sc, V) and As were determinated on 180 samples of surface sediments, by acid digestion and quantified by ICP-OES to assess enrichment factors in order to know the anthropogenic contribution of the investigated elements. The levels of metals indicated absence of contamination, but a higher enrichment of As (approximately 9.5) near Bertioga city. Ni and Cr had values between 0.5 - 2.0, Cu and Zn between 0.6 - 4.0 and 0.9 - 7.5 for Pb. Despite As, all others metals showed higher enrichment in Santos - São Vicente Estuary, especially near Cubatão. The analysis of the enrichment factor of As indicate that these values could be due to natural processes of weathering and sedimentation, meanwhile the other metals could be from antropogenic sources, since thoses values were found near industrial area.

  12. Dynamics of microalgal communities in the water-column/sediment interface of the inner shelf off Parana State, Southern Brazil

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    Ricardo Luiz Queiroz

    2004-12-01

    Full Text Available The composition and biomass of the microalgal community at the water-column/sediment interface on the continental shelf off Parana State (Brazil were studied every 2 months during 1999. Samples for cell identification and determination of chlorophyll a were taken from the interface layer and at discrete depths up to 4 m above the sediment. Results showed a community mainly formed by benthic and planktonic diatoms >30 µm, benthic diatoms 30 µm, which accounted for most of the pigment biomass, were resuspended from the interface after turbulent periods, and may take advantage of calm periods to stay and grow at the interface. Small benthic diatoms were more susceptible to wind-induced turbulence occurring in higher densities in the water column just above the water-sediment interface. A cyanobacterial bloom (Trichodesmiun was observed at these bottom layers in the spring-summer periods.A composição geral e a biomassa da comunidade microalgal da interface sedimento/água da plataforma do Estado do Paraná (Brasil foram estudadas em 1999 em relação ao regime de ventos. A cada dois meses foram coletadas amostras para a identificação de organismos e determinação de clorofila a, na interface água-sedimento e em profundidades discretas, ao longo da coluna d'água, até 4m acima do sedimento. Os resultados obtidos revelaram uma comunidade constituída principalmente por diatomáceas planctônicas e bentônicas maiores que 30 µm, diatomáceas bentônicas menores que 30 µm, e cianobactérias coloniais. As densidades celulares foram geralmente mais altas na interface. Eventos de mistura e sedimentação parecem ser determinantes na regulação da composição e biomassa de tais comunidades. Formas menores, mais susceptíveis à turbulência, dominaram a comunidade de água de fundo na maioria das ocasiões, e foram as mais abundantes na interface apenas em períodos de extrema estabilidade. Células maiores, aparentemente contendo a maior parte

  13. Pollen grains in quaternary sediments from the Campos Basin, state of Rio de Janeiro, Brazil: Core BU-91-GL-05

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    Aline Gonçalves de Freitas

    2013-12-01

    Full Text Available Here, we describe pollen grains extracted from a Pleistocene-Holocene sediment core (BU-91-GL-05; 22°48'45"S; 41°54'13"W taken from the Albacora Slope (22°48'45"S; 41°54'13"W, located in the Campos Basin of the northern region of the state of Rio de Janeiro, Brazil. The analysis resulted in the identification and morphological description of 46 types of pollen: one of a gymnosperm genus (Podocarpus; and 45 of angiosperm taxa across 27 families-one family of monocotyledons (Poaceae and 26 families (30 types of dicotyledons. The most common angiosperm families were Amaranthaceae (Chenopodium, Amaranthus and Gomphrena; Fabaceae (Fabaceae type, Bauhinia, Inga and Canavalia; Malpighiaceae (Tetrapteris, Heteropteris and Peixotoa; Malvaceae (Sida, Abutilon, Hibiscus and Pseudobombax; Rubiaceae (Faramea, Borreria and Psychotria; Asteraceae (Eupatorium and tribe Vernonieae; Bignoniaceae (Bignoniaceae type, Adenocalymma and Tabebuia; and Onagraceae (Fuchsia and Ludwigia. The palynoflora in this study are associated with dense montane and submontane Atlantic Forest, semideciduous forest and restinga (coastal woodland, all of which are present in the state of Rio de Janeiro. Palynological analysis can provide important data about paleovegetation and paleoclimatic changes in the studied area during the Quaternary, specifically in the last 145,000 years.

  14. Modern Diatom Distributions in Guanabara Bay Sediment and Oceanic Areas, Rio de Janeiro (Brazil

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    Frederico S. Silva

    2011-01-01

    Full Text Available One hundred and fifty three superficial sediments were collected in Guanabara Bay to physical-chemistry and diatom analyses in the ambit to Monitoring Project (CENPES/PETROBRAS. A total of 146 taxa of diatoms were identified where the most frequent taxa in Guanabara Bay were Amphora spp., Coscinodiscus spp. and Navicula yarrensis var. yarrensis. These species are potentially harmful that might harm fisheries and mariculture during blooms. The values of ecological indexes like richness and diversity followed the estuarine gradient were the higher values were found in the mouth and de low in the inner part. The multivariate analyzes permitted recognize seven diatom assemblages in the bay. The DCA analyze shows the most influence in the distribution of assemblages were the depth and pH. The diatom assemblages analyze proved to be an efficient tool in the environmental diagnosis of Guanabara Bay.

  15. Determination of natural radioactivity levels in sediments: Caravelas river, BA, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Carmo, R.F.; Trindade Filho, O.L.; Delgado, J.U.; Peixoto, J.G. P., E-mail: rfcarmo@bolsista.ird.gov.br, E-mail: octavio@ird.gov.br, E-mail: delgado@ird.gov.br, E-mail: guilherm@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Evangelista, H., E-mail: evangelista.uerj@gmail.com [Lab. de Radioecologia e Mudancas Globais (LARAMG/UERJ), Rio de Janeiro, RJ (Brazil)

    2016-07-01

    Due to intensive human activity in the region and disorderly occupation, the Caravelas River estuary has not yet evaluated the contribution of natural radioactivity. In order to determine the natural radioactivity levels in sediments, the activities of {sup 238}U, {sup 232}Th and {sup 40}K, were calculated using a gamma spectrometry system for measuring the concentration of radiation in samples. Results for {sup 238}U, {sup 232}Th and {sup 40}K ranged from (18.03 to 191.51), (28.57 to 118.25) and (134.06 to 186.80) Bq.kg{sup -1}, respectively, within of detection limits. The estimated uncertainty levels were less than 10% (k = 1). (author)

  16. Analysis in crab tissues and in sediment of estuary from Iguape (Sao Paulo, Brazil) by total reflection X-ray fluorescence

    Energy Technology Data Exchange (ETDEWEB)

    Salvador, Marcos J. [Universidade do Vale do Paraiba (UNIVAP), Sao Jose dos Campos, SP (Brazil)], E-mail: mjsalvador1531@yahoo.com.br; Sawazaki, David T.A.; Zucchi, Orgheda L.A. Domingues [Universidade de Sao Paulo (USP), Ribeirao Preto, SP (Brazil). Faculdade de Ciencias Farmaceuticas], E-mail: david_tatsuo@hotmail.com, E-mail: olzucchi@fcfrp.usp.br; Vives, Ana Elisa S. de [Universidade Metodista de Piracicaba (UNIMEP), Santa Barbara D' Oeste, SP (Brazil). Faculdade de Engenharia Civil, Arquitetura e Urbanismo], E-mail: aesvives@unimep.br; Hattori, Gustavo Y. [Universidade Federal do Amazonas, Benjamin Constant (Brazil). Faculdade de Ciencias Agrarias], E-mail: hattori@ufam.edu.br

    2007-07-01

    We report the use of Synchrotron Radiation Total Reflection X-Ray Fluorescence analysis (SR-TXRF) as a technique for macro, micro and trace elements determination in the tissues of the crab Ulcides cordatus and in the sediments from the Iguape estuary (Sao Paulo, Brazil) for environmental pollution control and toxicological evaluation. The analyses were performed on the U. cordatus (muscles and hepatopancreas) and on sediments from 24 sites of the Iguape estuary (Sao Paulo, Brazil). Tissues and sediments samples were analyzed by SRTXRF after digestion in an open system, using Ga as internal standard. Potassium (K), Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Sr, and Ba were the elements detected in crab hepatopancreas at concentration ranging from 0.516 (Mn) to 2061 (K) mug/g. Muscles samples presented the elements K, Ca, Ti, V, Cr, Fe, Ni, Cu, Zn, Br and Sr at concentrations ranging from 0.043 (Ni) to 1917 (K) mug/g. Potassium (K), Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr, Sn, Ce, and Pb were the elements detected in the sediment samples with concentration between 3.8 (Cu) and 14628 (Fe)mug/g. (author)

  17. Characterization of Ruminiclostridium josui arabinoxylan arabinofuranohydrolase, RjAxh43B, and RjAxh43B-containing xylanolytic complex.

    Science.gov (United States)

    Orita, Taku; Sakka, Makiko; Kimura, Tetsuya; Sakka, Kazuo

    2017-09-01

    A novel gene (axh43B) from Ruminiclostridium josui encoding a cellulosomal enzyme consisting of a catalytic module of subfamily GH43_10, a family-6 carbohydrate-binding module, and a dockerin module, was expressed using Escherichia coli. RjAxh43B released only arabinose from arabinoxylan and 23,33-di-α-l-arabinofuranosyl xylotriose, but not 32-α-l-arabinofuranosyl xylobiose or 23-α-l-arabinofuranosyl xylotriose, strongly suggesting that RjAxh43B is an arabinoxylan α-l-1,3-arabinofuranohydrolase capable of cleaving α-1,3-linked arabinose residues of doubly arabinosylated xylan. When Axh43B was mixed with the recombinant scaffolding protein RjCipA of R. josui at a molar ratio of 6:1, the activity of the RjAxh43B-RjCipA complex (6:1) toward insoluble wheat arabinoxylan was similar to that of RjAxh43B alone, suggesting that RjAxh43B does not show a proximity effect, which is defined as an activity enhancement effect caused by the presence of plural catalytic subunits adjoining each other. When RjAxh43A was mixed with xylanase RjXyn10C, they acted synergistically toward insoluble wheat arabinoxylan and rice straw powder in the absence of RjCipA. Furthermore, the RjAxh43B-RjXyn10C-RjCipA (3:3:3) complex had higher activity toward insoluble wheat arabinoxylan than a mixture of RjAxh43B and RjXyn10C without RjCipA, suggesting that incorporation of a xylanase and an α-l-arabinofuranosidase into a cellulosome is beneficial for more efficiently degrading arabinoxylan. Copyright © 2017 Elsevier Inc. All rights reserved.

  18. The response of nematode assemblages to intensive mussel farming in coastal sediments (Southern Brazil).

    Science.gov (United States)

    Netto, Sérgio A; Valgas, Israel

    2010-03-01

    The impact of mussel farms on the benthic environment was investigated using free-living nematode assemblages as indicators of environmental condition of the Enseada do Brito, a shallow embayment in South Brazil. The studied area is located at the State of Santa Catarina, responsible for 90% of the production of mussel farmed in the country. Samplings were carried out quarterly, from July 2004 to May 2005, below mussel ropes and at control sites located 300 m apart from the longlines. The results suggested that the mussel culture changed ecological functioning of the benthic environment at studied coastal embayment. The intense organic loads due to the biodeposition of the mussel farms, which had been in production for more than 10 years, have turned fine and well-sorted sand bottoms into a muddy deposit with significantly higher total organic content than the control. The number of nematode genera, diversity, dominance and trophic diversity were significantly lower under the mussel farms than at the control sites. The mussel farms biodeposition had also affected the temporal variability of nematode assemblages, which was detected only for samples at the control sites. The low depth and environmental energy, together with the age of the farms, were probably responsible for the observed changes in the nematode assemblages.

  19. Tectonics and sedimentation of the central sector of the Santo Onofre rift, north Minas Gerais, Brazil

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    Alice Fernanda Costa

    2017-09-01

    Full Text Available ABSTRACT: The Santo Onofre Group registers the filling of a Tonian, intracontinental paleo-rift that developed along the northern and central Espinhaço regions. This paper examines this unit in the central Espinhaço region with stratigraphic analysis and U-Pb geochronology, reviewing and dividing into the Canatiba and Rio Peixe Bravo Formations, which include the Barrinha Member. The Canatiba Formation mainly comprises carbon-rich mudstones that were deposited through low-density turbidity flows that alternated with sediment settling under anoxic conditions. The Rio Peixe Bravo Formation consists of a succession of sandstones and minor mudstones, which were deposited through low- to high-density turbidity flows. The Barrinha Member mainly consists of conglomerates and is related to channelized debris flows. Detrital zircon grains show maximum depositional ages of 930 ± 33 Ma and around 865 Ma for the Canatiba and Rio Peixe Bravo Formations, respectively. We interpret the Santo Onofre rifting to be relative younger than that for the Sítio Novo Group and to be a precursor stage of the glacial and post-glacial rift-to-passive margin-related sequences of the Macaúbas Group. The lithostratigraphic term “Macaúbas Supergroup” would be of better use to accommodate the unconformity-bounded Tonian sequences that were related to the Rodinia breakup in the Congo-São Francisco paleocontinent.

  20. Biological and oceanographic upwelling indicators at Cabo Frio (RJ

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    Gleyci A. O. Moser

    1997-01-01

    Full Text Available Phytoplankton biomass, chemical parameters and hydrology were studied in a transect 101.6 km long off Cabo Frio (RJ, Southeast Brazil, during summer (December 29 to 31, 1991 and winter (June 27 to 30, 1992. Wind induced upwelling events are frequently observed in the area during summer, becoming rare during winter. By the summer cruise a bloom of phytoplankton was observed in surface, close to the coast, with chlorophyll concentrations reaching 25.55 mg Chl-a m-3, uncoupled from the cold, nutrient rich waters of South Atlantic Central Water (SACW, found below 40 m depth. During the winter cruise, the SACW raised at the surface waters in front of Cabo Frio depicting an upwelling event. However, in spite of high surface nitrate concentrations (up to 7.7 f.1M chlorophyll-a were lower than 2 mg Chl-a m-3. The phytoplankton biomass, meteorological and hydrological data suggest a probable upwelling event immediately before the summer cruise, and an ongoing one during winter time. Cluster analyses and principal component analyses (PCA were applied to summer and winter data, pointing out multidimensional fronts in the area during both seasons.A biomassa fitoplanctônica, parâmetros químicos e hidrologia foram estudadas em um transecto de 101,6 Km ao largo de Cabo Frio, (RJ Brasil, durante o verão (Dezembro 29 a 31, 1991 e inverno (Junho 27 a 30, 1992. Nesta área, eventos de ressurgência induzidos pelo vento são comuns durante o verão, tornando-se mais raros durante o inverno. Durante o período de verão uma floração de fitoplâncton foi observada na superfície próximo ao continente, apresentando um máximo de clorofila-a igual a 25,55 mg Cl-a m'3 desacoplado das águas frias e ricas em nutrientes da Água Central do Atlântico Sul (ACAS, presente abaixo de 40 m. Durante o inverno, a ACAS alcançou a superflcie em frente a Cabo Frio, caracterizando um evento de ressurgência. Entretanto, apesar das altas concentrações de nitrato na superf

  1. Assessment of the acute toxicity of eutrophic sediments after the addition of calcium nitrate (Ibirité reservoir, Minas Gerais-SE Brazil: initial laboratory experiments

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    H. Janke

    Full Text Available This study evaluated the acute toxicity of sediment in a eutrophic reservoir after remediation with a calcium nitrate solution to retain phosphorus. The study involved microcosms of surface sediments and water from the sediment-water interface in the Ibirité reservoir. This reservoir, located in the vicinity of metropolitan Belo Horizonte (Minas Gerais, SE Brazil, is a water body that receives treated effluents from an oil refinery (REGAP-Petrobras, as well as high loads of untreated urban effluents from the city of Ibirité and surrounding areas and industrial effluents from a major industrial park. Incubation times of the treatment experiments were: t = 0, t = 5, t = 10, t = 25, t = 50, t = 85 and t = 135 days. One control microcosm and three treated microcosms were analysed in each time interval. Acute toxicity of water samples was assessed with Ceriodaphnia silvestrii Daday, 1902 and that of bulk sediment samples with Chironomus xanthus Rempel, 1939. Toxicity tests were carried out concomitantly with chemical analyses of dissolved inorganic nitrogen species (ammonia, nitrate and nitrite, sulfate and metals in the water samples of the microcosms. Acid volatile sulfides (AVS, simultaneously extracted metal (SEM and potentially bioavailable metal were analyzed in bulk sediment samples. Neither of the tested organisms showed toxicity in the control microcosm samples. The water column of the treated microcosm showed toxicity to C. silvestrii, starting at t = 10 days, while the sediment pore water toxicity started at t = 0 day. However, toxicity was found to decline from t = 85 days to t = 135 days. Sediments showed toxicity to C. xanthus during the entire experiment, except at the longest incubation time (t = 135 days. The overall results indicate that nitrate, which reached concentrations exceeding 1,200 mg N-NO3- L-1 in the sediment pore water of the treated microcosms, was most probably responsible for the toxicity of the samples. Although

  2. Natural radionuclides in plants, soils and sediments affected by U-rich coal mining activities in Brazil.

    Science.gov (United States)

    Galhardi, Juliana Aparecida; García-Tenorio, Rafael; Bonotto, Daniel Marcos; Díaz Francés, Inmaculada; Motta, João Gabriel

    2017-10-01

    Mining activities can increase the mobility of metals by accelerating the dissolution and leaching of minerals from the rocks and tailing piles to the environment and, consequently, their availability for plants and subsequent transfer to the food chain. The weathering of minerals and the disposal of coal waste in tailing piles can accelerate the generation of acid mine drainage (AMD), which is responsible for the higher dissolution of metals in mining areas. In this context, the behavior of U, Th and K in soils and sediment, and the transfer factor (TF) of 238U, 234U and 210Po for soybean, wheat, pine and eucalyptus cultivated around a coal mine in southern Brazil was evaluated. Alpha and gamma spectrometry were used for the measurements of the activity concentration of the radioelements. 210Po was the radionuclide that is most accumulated in the plants, especially in the leaves. When comparing the plant species, pine showed the highest TF values for 234U (0.311 ± 0.420) for leaves, while eucalyptus showed the highest TF for 238U (0.344 ± 0.414) for leaves. In general, TF were higher for the leaves of soybean and wheat when compared to the grains, and grains of wheat showed higher TF for 210Po and 238U than grains of soybean. Deviations from the natural U isotopic ratio were recorded at all investigated areas, indicating possible industrial and mining sources of U for the vegetables. A safety assessment of transport routes and accumulation of radionuclides in soils with a potential for cultivation is important, mainly in tropical areas contaminated with solid waste and effluents from mines and industry. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Palynological analysis of a sediment core obtained in Guanabara Bay, Rio de Janeiro, Brazil

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    Cintia F. Barreto

    2007-06-01

    Full Text Available The sediment of a core collected about 2 km north of Paquetá Island, Guanabara Bay, was submitted to pollen analysis, in order to recognize the dynamics of the regional vegetation, and the anthropic influence. Radiocarbon dating of a sample next to the bottom of the core indicates an age of 4.210 ± 40 14C yrs B.P (calibrated age. It was possible to establish four palynological zones. Starting at the bottom of the core, a decrease in palynomorph concentration, the presence of degraded pollen grains and spores, and the predominance of ombrophilous forest pollen grains were observed in the basal portion of Zone I. These data may indicate the presence of an exuberant Atlantic Forest, dominated by a marine regressive event. The concentration of well-preserved palynomorphs increased in Zone II, with the predominance of the ombrophilous forest vegetation also, and an expressive increase of hygrophytes, indicating more humid environmental conditions. Palynomorph concentration decreased again toward the top of Zone III, and the field vegetation was predominant. In the upper Zone IV occurred a strong decrease in pollen and spore concentration, with predominance of field vegetation also, and the appearance of exotic pollen grains, showing the anthropic influence at this time.Sedimentos de um testemunho de sondagem coletado a 2 km ao norte da Ilha de Paquetá, Baía de Guanabara foram submetidos à análise palinológica, com o objetivo de reconhecer e interpretar a dinâmica temporal da vegetação na região e a influência antrópica. A datação radiocarbônica realizada próxima à base do testemunho indicou uma idade de 4.210 ± 40 anos AP (idade calibrada. Os resultados possibilitaram determinar quatro zonas palinológicas. Na Zona I, a mais basal, observou-se o decréscimo da concentração total de palinomorfos em direção ao topo e elevada deposição de grãos de pólen e esporos degradados, com o predomínio de grãos de pólen concernentes

  4. Immunohistokemialliset lihasbiopsiavärjäykset lihastautien diagnostiikassa

    OpenAIRE

    Nieminen, Sanni; Sirola, Menna

    2016-01-01

    Lihastaudit ovat pääosin geneettisiä sairauksia, joiden tyypillisimpiä oireita ovat luusto-lihasten kivuton heikkous ja surkastuminen. Tällä hetkellä lihastauteja tunnetaan yli 800, joiden diagnostiikka on useimmiten monivaiheinen ja pitkäkestoinen prosessi. Yksi keskeisimmistä lihastautien tutkimusmenetelmistä on lihasbiopsiasta tehtävät immunohisto-kemialliset lihasbiopsiavärjäykset. Opinnäytetyön aiheena oli Immunohistokemialliset lihasbiopsiavärjäykset lihastautien diagnostiikassa. Aihe s...

  5. Inorganic and organic geochemical fingerprinting of sediment sources and ocean circulation on a complex continental margin (São Paulo Bight, Brazil)

    Science.gov (United States)

    Michaelovitch de Mahiques, Michel; Jörg Hanebuth, Till Jens; Hanae Nagai, Renata; Caruso Bícego, Marcia; Lopes Figueira, Rubens Cesar; Mello Sousa, Silvia Helena; Burone, Leticia; Franco-Fraguas, Paula; Taniguchi, Satie; Barbosa Salaroli, Alexandre; Pereira Dias, Gilberto; Menezes Prates, Denise; Fernandes Freitas, Maria Eugenia

    2017-03-01

    In this study, we use inorganic (metal) and organic (bulk and molecular) markers in sediment samples of the south-eastern Brazilian margin to investigate the response of geochemical fingerprints to the complex hydrodynamic processes present in the area. Results indicate the potential of export of terrigenous siliciclastic and organic constituents to the upper slope, even in an area with limited fluvial supply.Metal contents and especially the ln(Ti / Al) and ln(Fe / K) ratios make it possible to recognise the extension of shelf sediments toward the upper slope. Potassium, here expressed as ln(K / Sc) and ln(K / Al) ratios used as proxies of illite-kaolinite variations, proved to be an important parameter, especially because it allowed us to decipher the imprint of the northward flow of the Intermediate Western Boundary Current (IWBC) in comparison to the southward flows of the Brazil Current (BC) and Deep Western Boundary Current (DWBC). Using organic matter analyses, we were able to evaluate the extent of terrestrial contributions to the outer shelf and slope, even without the presence of significant fluvial input. In addition, molecular markers signify a slight increase in the input of C4-derived plants to the slope sediments, transported from distant areas by the main alongshore boundary currents, indicating that the terrestrial fraction of the organic matter deposited on the slope has a distinct origin when compared to shelf sediments.

  6. Characterization of organic matter in sediment cores of the Todos os Santos Bay, Bahia, Brazil, by elemental analysis and 13C NMR.

    Science.gov (United States)

    Costa, A B; Novotny, E H; Bloise, A C; de Azevedo, E R; Bonagamba, T J; Zucchi, M R; Santos, V L C S; Azevedo, A E G

    2011-08-01

    The impact of human activity on the sediments of Todos os Santos Bay in Brazil was evaluated by elemental analysis and 13C Nuclear Magnetic Resonance (13C NMR). This article reports a study of six sediment cores collected at different depths and regions of Todos os Santos Bay. The elemental profiles of cores collected on the eastern side of Frades Island suggest an abrupt change in the sedimentation regime. Autoregressive Integrated Moving Average (ARIMA) analysis corroborates this result. The range of depths of the cores corresponds to about 50 years ago, coinciding with the implantation of major onshore industrial projects in the region. Principal Component Analysis of the 13C NMR spectra clearly differentiates sediment samples closer to the Subaé estuary, which have high contents of terrestrial organic matter, from those closer to a local oil refinery. The results presented in this article illustrate several important aspects of environmental impact of human activity on this bay. Copyright © 2011 Elsevier Ltd. All rights reserved.

  7. Preliminary assessment of Miramar Petrochemical Harbor as PAH source to Guajará bay (Belém-PA-Brazil surface sediments

    Directory of Open Access Journals (Sweden)

    Silvana do Socorro Veloso Sodré

    Full Text Available Abstract A preliminary study on a petrochemical harbor as a potential source of polycyclic aromatic hydrocarbons (PAH to surface sediments of Guajará bay, located in Belém City, Pará State, Brazil, over the last 10 years is presented here. The 16 priority USEPA PAH were identified and quantified. Surface sediment samples, collected at 5 sites in the bay, near Miramar Petrochemical Harbor (TEMIR, were extracted and analyzed by high performance liquid chromatography with a diode array detector. Total PAH concentration ranged from 533.0 to 3123.3 ng g-1 dry weight with a mean concentration of 1091.9 ng g-1. The most contaminated places were those where muddy sediments were found with highest concentrations of organic matter. The priority PAH with low molecular weight represented 54.4% of the total abundance and indicate that the main source of contamination of the sediments was petrogenic, indicative of the relevant contribution of the petrochemical harbor activity to the input of PAH to Guajará bay. However, pyrolytic PAH coming from fuel combustion, household waste combustion and untreated sewage discharge are also potential contamination sources to this environment.

  8. Young men in RJ-settings: An offstage performance

    DEFF Research Database (Denmark)

    Asmussen, Ida Helene

    with Foucault and the neo-liberal conception of power as productive - meaning that power does not only repress and limit but shapes and forms the subject - the youngsters´ “non-attitude” could be seen as a resignation or refusal of being dictated by the meeting´s RJ-script. Such a script expects self...

  9. The effects of unpaved roads on suspended sediment concentration of third- to fifth-order streams- A case study from southern Brazil

    Science.gov (United States)

    Thomaz, E. L.; Vestena, L. R.; Ramos-Scharron, C. E.

    2012-12-01

    Unpaved roads have earned a reputation of inducing adverse effects on downstream water resources by increasing suspended sediment concentration because they typically generate sediment at rates up to several orders of magnitude above background and because they may enhance the efficiency of sediment delivery to fluvial networks. Although much research has been conducted on road effects in forested landscapes, proper understanding of their hydro-geomorphic role in rural areas is still desired. Unpaved roads are fundamental in the agricultural systems employed for the cultivation of maize and black beans on topographically-steep, marginal lands of southern Brazil. Marginal lands generate a sizeable fraction of the agricultural production in the state of Paraná, one of Brazil's agricultural powerhouses. This study documents the localized impacts on suspended sediment concentration of seven unpaved road crossings in the Guarabiroba River Catchment, Paraná, Brazil. A total of 156 suspended sediment samples were manually collected both upstream and downstream of road-crossings between 22-Apr-09 and 26-Apr-10 during 14 rainfall events ranging between 16 and 96 mm in total rainfall. The average length of road directly delivering runoff to each crossing varied from 0.56 - 2.4 km, and the size of the catchment areas of the third to fifth order monitored streams ranged from 0.3 to 13.5 km2. In addition to stream samples, 78 samples representing unpaved road runoff were collected during the same rain events. Upstream and downstream mean concentration values were compared for each storm at every site based on a paired t-test analysis (0.05% level). Mean suspended sediment concentration at stream segments located upstream of road crossings was 0.04 mg L-1 (s.d. = 0.05 mg L-1), while the mean downstream concentration was 0.11 mg L-1 (s.d. = 0.14 mg L-1) or 2.9 times higher than upstream samples. Meanwhile, road runoff had an average concentration of 0.93 mg L-1 (s.d. = 0.97 mg

  10. Fe, Mn, P and S speciation in sediments from the Capivara Hydroelectric Dam Lake (Brazil) as an indicator of anthropogenic influences

    Energy Technology Data Exchange (ETDEWEB)

    Ishikawa, Dilson Norio [Department of Chemistry, CCE, Londrina State University, Londrina, Parana (Brazil); Spacino Scarminio, Ieda [Laboratory of Chemometrics in Natural Sciences, Department of Chemistry, CCE, Londrina State University, Londrina, Parana (Brazil); Souza Costa, Joao de; Santos Nora, Paulo dos; Fatima Soares, Miriam de; Mansano Nicolau, Romilaine; Esteves Goncalves, Adriana Celeste; Giancoli Barreto, Sonia Regina [Laboratory of Environmental Physical Chemistry, Department of Chemistry, CCE, Londrina State University, Londrina, Parana (Brazil); Barreto, Wagner Jose

    2008-04-15

    The conservation of large water resources is essential for the preservation of human life. The quantification and, more importantly, the speciation of chemical substances that indicate the presence of anthropogenic contamination in water resources are of great importance. This paper presents the results of analysis for the determination of organic, inorganic and total phosphorus, pseudo-sulfur, and iron and manganese, in five fractions, in water sediments collected from the Capivara Hydroelectric Power Plant, Brazil. A study on the seasonal variation of these parameters was conducted, with data having been collected in the winter and in the summer, at two sites along the dam, 5 km apart, close to the city of Primeiro de Maio. Phosphorous was found in sediments and adjacent soil in the organic form (OP), and was used as an indicator of anthropogenic influence on the reservoir banks. Speciation of potentially toxic Mn showed that it is present in the exchangeable fraction of the 0-5 cm depth layer (sediment/water interface), making its transfer to the water column possible. Results from this study showed that domestic and industrial effluent treatment measures are needed for the preservation of the quality of aquatic environments. (Abstract Copyright [2008], Wiley Periodicals, Inc.)

  11. Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05

    Directory of Open Access Journals (Sweden)

    Aline Gonçalves de Freitas

    2015-06-01

    Full Text Available This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years BP. Thirty different types of palynomorphs were identified, described, and photographed: two bryophyte spores (sensu lato; 21 pteridophyte spores; four freshwater microalgae; onePseudoschizaea; and two microfungi. Some of the identified spores (Sphagnum, Blechnum, Cyatheaceae, Dennstaedtiaceae, Lycopodiella, Microgramma, Polypodium, Acrostichum, Pityrogramma, and Lygodium are related to the modern flora found on the northern coast of Rio de Janeiro State, at the Restinga of Jurubatiba, from vegetation types such as shrub swamp/coastal swamp formation, seasonally flooded forest, Clusia and Ericaceae woods, and disturbed vegetation. The freshwater microalgae and the microfungi are also presently recorded from the coastal lagoons of this region. The high spore concentration in slope sediments reflects the intense terrigenous influx, caused by a relative low sealevel during glacial stages. Palynological analysis suggests the presence of taxa from flooded forests and humid areas in the coastal plain during glacial and interglacial stages of the Late Pleistocene.

  12. Mangrove Crab Ucides cordatus Removal Does Not Affect Sediment Parameters and Stipule Production in a One Year Experiment in Northern Brazil

    Science.gov (United States)

    2016-01-01

    Mangrove crabs influence ecosystem processes through bioturbation and/or litter feeding. In Brazilian mangroves, the abundant and commercially important crab Ucides cordatus is the main faunal modifier of microtopography establishing up to 2 m deep burrows. They process more than 70% of the leaf litter and propagule production, thus promoting microbial degradation of detritus and benefiting microbe-feeding fiddler crabs. The accelerated nutrient turn-over and increased sediment oxygenation mediated by U. cordatus may enhance mangrove tree growth. Such positive feed-back loop was tested in North Brazil through a one year crab removal experiment simulating increased harvesting rates in a mature Rhizophora mangle forest. Investigated response parameters were sediment salinity, organic matter content, CO2 efflux rates of the surface sediment, and reduction potential. We also determined stipule fall of the mangrove tree R. mangle as a proxy for tree growth. Three treatments were applied to twelve experimental plots (13 m × 13 m each): crab removal, disturbance control and control. Within one year, the number of U. cordatus burrows inside the four removal plots decreased on average to 52% of the initial number. Despite this distinct reduction in burrow density of this large bioturbator, none of the measured parameters differed between treatments. Instead, most parameters were clearly influenced by seasonal changes in precipitation. Hence, in the studied R. mangle forest, abiotic factors seem to be more important drivers of ecosystem processes than factors mediated by U. cordatus, at least within the studied timespan of one year. PMID:27907093

  13. Assessment of sediments from Tiete River - toxicity and trace elements - from Salesopolis to Suzano counties, Sao Paulo, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Alegre, Gabriel F.; Borrely, Sueli, E-mail: gabrielfonseca@usp.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Centro de Tecnologia das Radiacoes; Nascimento, Thuany M.; Favaro, Deborah I.T., E-mail: defavaro@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao Neutronica

    2009-07-01

    In the present study, sediment samples from the Tiete River were evaluated for toxicity and trace metals (5 sampling sites). The studied region includes Salesopolis to Suzano and surroundings, a highly industrialized area. The study involved toxicity evaluation (sediment, elutriate and pore-water) and the distribution of some major, trace and rare earth elements on sediments. Multielemental analysis was carried out by instrumental neutron activation analysis (INAA) and total mercury by cold vapor atomic absorption technique (CV AAS). The concentration values obtained for the metals As, Cr, Hg and Zn in the sediment samples were compared to the Canadian Council of Minister of the Environment (CCME) oriented values (TEL and PEL). Regarding toxicity, whole sediments and elutriate fractions were evaluated using chronic assays for Ceriodaphnia dubia, while the pore water was carried out for Vibrio fischeri toxicity assays. These assays followed Brazilian Standardized Methods (ABNT). Whole sediments and elutriate evidenced negative biological effects, even at Salesopolis county, the control site (less impacted area). The worst effects were obtained at Mogi das Cruzes and Suzano counties (sampling stations 3 and 4). The elutriate fractions collected at the same stations showed acute toxicity in two of three samples (C. dubia). When pore water was evaluated, a toxicity gradient which increased as the river flowed through Mogi das Cruzes county was obtained. Regarding toxic metal contents in the sediment samples points 3 and 4 exceeded the TEL oriented values for As, Cr, Hg and Zn and point 4 also exceeded the PEL values for all these elements. (author)

  14. Determination of Pb-210 and Ra-226 in sediments from Acude de Apipucos - Recife, Pernambuco, Brazil; Determinacao de chumbo-210 e radio-226 em sedimentos do Acude de Apipucos - Recife - Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Vivianne Lucia Bormann de; Melo, Roberto Teodozio de; Figueiredo, Marcela Durao Cesar de; Rodrigues, Kelia Rejane Goncalves; Cunha, Manuela Silva da; Silva, Danubia B. da; Pedroza, Eryka de H., E-mail: vlsouza@cnen.gov.b, E-mail: rtmelo@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil); Oliveira, Aristides [Hospital de Cancer de Pernambuco, Recife, PE (Brazil)

    2011-07-01

    This study aims to determine the age of sediment layers in Apipucos Reservoir, located in Recife, Brazil. Dating with {sup 210}Pb and {sup 226}Ra concentrations found in these sediments was used. A core with length of 70 cm and internal diameter of 5 cm was used for sediment sampling and each obtained profile was sectioned. Lead and radium were extracted from these samples by adding acids. {sup 210}Pb and {sup 226}Ra were determined in a gas flow proportional detector, based on the activities of their daughters. It was found that the CRS model (Constant Rate of Supply) to calculate the ages of sediment was more appropriate than CIC (Constant Initial Concentration). The chronology showed that the first sediment layers were 30 years old. (author)

  15. Long-term vegetation, climate and ocean dynamics inferred from a 73,500 years old marine sediment core (GeoB2107-3) off southern Brazil

    Science.gov (United States)

    Gu, Fang; Zonneveld, Karin A. F.; Chiessi, Cristiano M.; Arz, Helge W.; Pätzold, Jürgen; Behling, Hermann

    2017-09-01

    Long-term changes in vegetation and climate of southern Brazil, as well as ocean dynamics of the adjacent South Atlantic, were studied by analyses of pollen, spores and organic-walled dinoflagellate cysts (dinocysts) in marine sediment core GeoB2107-3 collected offshore southern Brazil covering the last 73.5 cal kyr BP. The pollen record indicates that grasslands were much more frequent in the landscapes of southern Brazil during the last glacial period if compared to the late Holocene, reflecting relatively colder and/or less humid climatic conditions. Patches of forest occurred in the lowlands and probably also on the exposed continental shelf that was mainly covered by salt marshes. Interestingly, drought-susceptible Araucaria trees were frequent in the highlands (with a similar abundance as during the late Holocene) until 65 cal kyr BP, but were rare during the following glacial period. Atlantic rainforest was present in the northern lowlands of southern Brazil during the recorded last glacial period, but was strongly reduced from 38.5 until 13.0 cal kyr BP. The reduction was probably controlled by colder and/or less humid climatic conditions. Atlantic rainforest expanded to the south since the Lateglacial period, while Araucaria forests advanced in the highlands only during the late Holocene. Dinocysts data indicate that the Brazil Current (BC) with its warm, salty and nutrient-poor waters influenced the study area throughout the investigated period. However, variations in the proportion of dinocyst taxa indicating an eutrophic environment reflect the input of nutrients transported mainly by the Brazilian Coastal Current (BCC) and partly discharged by the Rio Itajaí (the major river closest to the core site). This was strongly related to changes in sea level. A stronger influence of the BCC with nutrient rich waters occurred during Marine Isotope Stage (MIS) 4 and in particular during the late MIS 3 and MIS 2 under low sea level. Evidence of Nothofagus pollen

  16. Ocorrência de plantas aquáticas nos reservatórios da Light-RJ Ocurrence of aquatic plants in the Light-RJ reservoirs

    Directory of Open Access Journals (Sweden)

    D. Martins

    2003-01-01

    Full Text Available O objetivo do presente trabalho foi caracterizar as comunidades infestantes de plantas aquáticas presentes nos reservatórios da Light-Sistema de Eletricidade S.A., localizada no município de Piraí-RJ. Os levantamentos foram realizados no período de julho a setembro de 1998. Os reservatórios analisados foram: Vigário, Pereira Passos e Lajes, sendo as quantidades de pontos amostrados de 19, 9 e 15, respectivamente. Em cada ponto amostrado fez-se a marcação das coordenadas geográficas e avaliou-se a porcentagem de ocupação do corpo d'água pelas espécies de plantas aquáticas presentes. Depois da identificação das plantas, pôde-se verificar quais eram as espécies mais freqüentes e a sua distribuição dentro do sistema de geração de energia. As espécies encontradas nos reservatórios foram: Brachiaria arrecta (Hack. Stent.; Egeria densa Planch.; Eichhornia azurea (Sw. Kunth.; Eichhornia crassipes (Mart. Solms.; Hymenachne amplexicaulis (Rudge Nees.; Panicum rivulare Trin.; Pistia stratiotis L.; Polygonum spp.; Sagitaria montevidensis Cham. & Schlecht; Salvinia auriculata (Micheli Adans; e Thypha dominguensis L.This study aimed to describe the aquatic weeds infesting the Light-Electric System S.A. reservoirs, located in Pirai-RJ, Brazil. The survey was carried out from July to September 1998. The reservoirs analyzed were: Vigario, Pereira Passos and Lajes, with 19, 9 and 15 points being sampled, respectively. Sampled geographic coordinates were marked in each point and a visual estimate was made of the percentage of river water occupied by the aquatic plants. After plant identification, the most frequent species and their distribution were determined as follows: Brachiaria arrecta (Hack. Stent.; Egeria densa Planch.; Eichhornia azurea (Sw. Kunth.; Eichhornia crassipes (Mart. Solms.; Hymenachne amplexicaulis (Rudge Nees.; Panicum rivulare Trin.; Pistia stratiotis L.; Polygonum spp.; Sagitaria montevidensis Cham.& Schlecht

  17. Particle Fluxes and Bulk Geochemical Characterization of the Cabo Frio Upwelling System in Southeastern Brazil: Sediment Trap Experiments between Spring 2010 and Summer 2012

    Directory of Open Access Journals (Sweden)

    ANA LUIZA S. ALBUQUERQUE

    2014-06-01

    Full Text Available Physical and biogeochemical processes in continental shelves act synergistically in both transporting and transforming suspended material, and ocean dynamics control the dispersion of particles by the coastal zone and their subsequent mixing and dilution within the shelf area constrained by oceanic boundary currents, followed by their gradual settling in a complex sedimentary scenario. One of these regions is the Cabo Frio Upwelling System located in a significantly productive area of Southeastern Brazil, under the control of the nutrient-poor western boundary Brazil Current but also with a wind-driven coastal upwelling zone, inducing cold-water intrusions of South Atlantic Central Water on the shelf. To understand these synergic interactions among physical and biogeochemical processes in the Cabo Frio shelf, a series of four experiments with a total of 98 discrete samples using sediment traps was performed from November 2010 to March 2012, located on the 145 m isobath on the edge of the continental shelf. The results showed that lateral transport might be relevant in some cases, especially in deep layers, although no clear seasonal cycle was detected. Two main physical-geochemical coupling scenarios were identified: singular downwelling events that can enhance particles fluxes and are potentially related to the Brazil Current oscillations; and events of significant fluxes related to the intrusion of the 18°C isotherm in the euphotic zone. The particulate matter settling in the Cabo Frio shelf area seems to belong to multiple marine and terrestrial sources, in which both Paraiba do Sul River and Guanabara Bay could be potential land-sources, although the particulate material might subject intense transformation (diagenesis during its trajectory to the shelf edge.

  18. Ardra profiles of bacteria and archaea in mangrove sediments with different levels of contamination in the estuarine complex of Paranaguá, Brazil

    Directory of Open Access Journals (Sweden)

    Catherine Gérikas Ribeiro

    2013-04-01

    Full Text Available The mangrove's sediments from the coastal areas under human activities may contain significant contaminations by hydrocarbons, even when there are no visual evidences of it. The microorganisms are essential to these ecosystems, especially in the control of their chemical environment. Sediment samples were collected in two regions under different environment conditions (pristine and contaminated of the Paranaguá Estuarine Complex (Paranaguá Bay and Laranjeiras Bay, Brazil. Aliphatic hydrocarbons were determined by the GC-FID to assess the status of contamination of the studied areas. The total DNA was extracted from these samples. The 16S rRNA gene was amplified by the PCR reactions with the pair of primers 21F and 958R for the archaeal domain, and 27F and 1492R for the bacterial domain. Comparisons of communities were made by the ARDRA technique, using the HinfI restriction enzyme. The phosphate concentration showed significant differences between the two regions. The aliphatic hydrocarbons analysis showed the presence of unresolved complex mixture (UCM, an indicator of oil contamination, in the samples from the Paranaguá Bay, which was corroborated by the concentration of total aliphatic hydrocarbons. The ARDRA profile indicated that the structure of archaeal and bacterial communities of the sampled areas was very similar. Therefore, the anthropogenic influences in the Paranaguá Bay showed to be not sufficient to produce disturbances in the prokaryotic dominant groups.

  19. Technical, economical and environmental viability study for utilization of budgeters on a farm at Recreio dos Bandeirantes, Rio de Janeiro, Brazil; Estudo de viabilidade tecnica, economica e ambiental de utilizacao de biodigestores em uma fazenda no Recreio dos Bandeirantes, Rio de Janeiro, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Franca, Vignicius Curi de; Almeida, Silvio Carlos Anibal de; Mauro Junior, Leonardo [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Centro de Tecnologia], e-mail: airninho@hotmail.com, e-mail: silvioa@gmail.com, e-mail: leonardomauro@terra.com.br

    2008-07-01

    This paper evaluates the technical, economical and environmental viability of solutions for supply electric power and residue treatment in a farm at the Recreio dos Bandeirantes, Rio de Janeiro, Brazil. This paper proposed and dimensioned a system for production of biogas from swine residues. The paper concludes that the benefits coming from biogas for using in the farm facilities presented advantages when compared with the use of conventional sources such as electric power and liquefied petroleum gas (LPG)

  20. {sup 137}Cs as tracer of the origin of allochthonous sediments in the Southeast Continental Margin of Brazil; {sup 137}Cs como tracador da origem de sedimentos aloctones na Margem Continental Sudeste do Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Paulo A.L.; Mahiques, Michel M.; FIgueira, Rubens C.L., E-mail: paulo.alves.ferreira@usp.br, E-mail: mahiques@usp.br, E-mail: rfigueira@usp.br [Universidade de Sao Paulo (IO/USP), SP (Brazil). Instituto Oceanografico; Franca, Elvis J., E-mail: ejfranca@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2015-07-01

    The distribution of {sup 137}Cs, artificial radionuclide for which there is no current source, can inform on the origin and destination of sediments. This study analyzed about 60 samples of surface sediment to generate a model of spatial distribution of {sup 137}Cs in the Southeast Continental Margin of Brazil and surroundings for evaluating possible sediment sources for this region. The model showed that the levels of {sup 137}Cs in the southern compartment of the Southeast Brazilian Margin (south of Sao Sebastiao Island) are statistically similar to those of the Rio de la Plata river mouth region, indicating sediment entry due to the seasonal intrusion of the plume of Rio de la Plata, a phenomenon already studied by other authors.

  1. Imposex and surface sediment speciation: a combined approach to evaluate organotin contamination in Guanabara Bay, Rio de Janeiro, Brazil.

    Science.gov (United States)

    Fernandez, M A; de Luca Rebello Wagener, A; Limaverde, A M; Scofield, A L; Pinheiro, F M; Rodrigues, E

    2005-06-01

    An integrated biological-chemical survey of organotin compounds was carried out in Guanabara Bay, the second most important Brazilian harbor complex. The biological survey revealed high levels of imposex in Stramonita haemastoma populations. Inside the bay values of relative penis length index from 42.7 to 107.6 and vas deferens sequence index from III to VI were found, while organisms collected outside the bay had values ranging from imposex was found in all stations. Surface sediments in the bay are contaminated by tributyltin (10-522 ng/g d.w.) and triphenyltin (imposex-sediment approach to evaluate organotin contamination in marine environments of South America, and also the first report of TPT detection in environmental matrices in this region.

  2. The influence of particles recycling on the geochemistry of sediments in a large tropical dam lake in the Amazonian region, Brazil

    Science.gov (United States)

    Fonseca, Rita; Pinho, Catarina; Oliveira, Manuela

    2016-12-01

    As a result of over-erosion of soils, the fine particles, which contain the majority of nutrients, are easily washed away from soils, which become deficient in a host of components, accumulating in lakes. On one hand, the accumulation of nutrients-rich sediments are a problem, as they affect the quality of the overlying water and decrease the water storage capacity of the system; on the other hand, sediments may constitute an important resource, as they are often extremely rich in organic and inorganic nutrients in readily available forms. In the framework of an extensive work on the use of rock related materials to enhance the fertility of impoverish soils, this study aimed to evaluate the role on the nutrients cycle, of particles recycling processes from the watershed to the bottom of a large dam reservoir, at a wet tropical region under high weathering conditions. The study focus on the mineralogical transformations that clay particles undergo from the soils of the drainage basin to their final deposition within the reservoir and their influence in terms of the geochemical characteristics of sediments. We studied the bottom sediments that accumulate in two distinct seasonal periods in Tucuruí reservoir, located in the Amazonian Basin, Brazil, and soils from its drainage basin. The surface layers of sediments in twenty sampling points with variable depths, are representative of the different morphological sections of the reservoir. Nineteen soil samples, representing the main soil classes, were collected near the margins of the reservoir. Sediments and soils were subjected to the same array of physical, mineralogical and geochemical analyses: (1) texture, (2) characterization and semi-quantification of the clay fraction mineralogy and (3) geochemical analysis of the total concentration of major elements, organic compounds (organic C and nitrogen), soluble fractions of nutrients (P and K), exchangeable fractions (cation exchange capacity, exchangeable bases and

  3. Archaeal diversity and the extent of iron and manganese pyritization in sediments from a tropical mangrove creek (Cardoso Island, Brazil)

    Science.gov (United States)

    Otero, X. L.; Lucheta, A. R.; Ferreira, T. O.; Huerta-Díaz, M. A.; Lambais, M. R.

    2014-06-01

    Even though several studies on the geochemical processes occurring in mangrove soils and sediments have been performed, information on the diversity of Archaea and their functional roles in these ecosystems, especially in subsurface environments, is scarce. In this study, we have analyzed the depth distribution of Archaea and their possible relationships with the geochemical transformations of Fe and Mn in a sediment core from a tropical mangrove creek, using 16S rRNA gene profiling and sequential extraction of different forms of Fe and Mn. A significant shift in the archaeal community structure was observed in the lower layers (90-100 cm), coinciding with a clear decrease in total organic carbon (TOC) content and an increase in the percentage of sand. The comparison of the archaeal communities showed a dominance of methanogenic Euryarchaeota in the upper layers (0-20 cm), whereas Crenarchaeota was the most abundant taxon in the lower layers. The dominance of methanogenic Euryarchaeota in the upper layer of the sediment suggests the occurrence of methanogenesis in anoxic microenvironments. The concentrations of Fe-oxyhydroxides in the profile were very low, and showed positive correlation with the concentrations of pyrite and degrees of Fe and Mn pyritization. Additionally, a partial decoupling of pyrite formation from organic matter concentration was observed, suggesting excessive Fe pyritization. This overpyritization of Fe can be explained either by the anoxic oxidation of methane by sulfate and/or by detrital pyrite tidal transportation from the surrounding mangrove soils. The higher pyritization levels observed in deeper layers of the creek sediment were also in agreement with its Pleistocenic origin.

  4. Comparison of different enrichment factors to assess the natural accumulation of trace elements in sediment cores from Nhecolandia Pantanal, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Levi F.; Damatto, Sandra R., E-mail: leyi@usp.br, E-mail: damatto@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Barbiero, Laurent, E-mail: barbiero@ltmg.obs.mip.fr [Centro de Energia Nuclear na Agricultura (CENA/USP), Sao Paulo, SP (Brazil); Furian, Sonia M., E-mail: furian@usp.br [Universidade de Sao Paulo (USP), Sao Paulo, SP (Brazil). Departamento de Geografia; Rezende Filho, Ary T., E-mail: ary.rezende@ufms.br [Universidade Federal do Mato Grosso do Sul (UFMS), MS (Brazil). Faculdade de Engenharias, Arquitetura e Urbanismo e Geografia

    2015-07-01

    Four sediment cores were collected at different lakes of salty water, commonly known as 'Salinas', in the Nhecolandia Wetland. In the collected cores, Salina A, Salina 6, Salina M and Salina V, the elements As, Ba, Co, Cr, Cs, Fe, Hf, K, Na, Rb, Sb, Se, U, Zn and rare earth elements Ce, Eu, La, Lu, Nd, Sc, Sm, Tb and Yb concentrations were determined by instrumental neutron activation analysis (INAA) technique. Aiming to verify the best criterion to evaluate the enrichment factor of minor and major elements in the sediment cores, three different calculations of the enrichment factor was employed. The first one, EF (Enrichment Factor), compares the normalized element concentrations with Upper Continental Crust normalized values, the second one, GNF (Geochemical Normalization Factor) compares the ratio between the element concentration and the normalizer with the depth in the sediment core; for these both factors the element Sc was used as a normalizer element. The third one factor, BEF (Base Enrichment Factor), compares the concentrations determined throughout the core with the results obtained in the base of it. With the results, it was possible to conclude that the best enrichment factor to evaluate the enhancement of elements in natural environments is the one that takes into account the core element concentration obtained in the base of it, BEF. (author)

  5. A Model Analysis for the Design and Deployment of an Eulerian Sediment Trap Mooring Array in a Western Boundary Upwelling System from Southeast Brazil

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    URSULA MENDOZA

    2014-06-01

    Full Text Available This work addresses the design and configuration of a Eulerian sediment trap mooring array, which was deployed at the shelf edge (zm ≈ 140 m 80 km off Cabo Frio, SE- Brazil (23° S. The site was subject to interplay between the Tropical Waters (TW of the Brazil Current (BC, intrusions from the South Atlantic Central Waters (SACW, which are the source of upwelling in the region, and other oceanographic processes. Detailed computations were used to optimize the total weight, buoyancy balance, and maximum acceptable tilt to avoid hydrodynamic bias in the trapping efficiency and array adaptation to the local oceanographic conditions with the assistance of Matlab and Muringa programs and Modular Ocean Model 4.0 (MOM; i.e., to assert the vertical distribution of the meridional current component. The velocity range of the current component was determined by short term measurements to be between 0.1 and 0.5 m/s. Projections led to a resulting minimum anchor weight of 456 kg. The necessary line tension was ascertained by using the appropriate distribution of a series of buoys along the array, which finally attained a high vertical load of 350 kg because of the attached oceanographic equipment. Additional flotation devices resulted in a stable mooring array as reflected by their low calculated tilt (2.6° ± 0.6°. A low drag of 16 N was computed for the maximum surface current velocity of 0.5 m/s. The Reynolds number values ranged from 4 × 104 to 2 × 105 and a cone-trap aspect ratio of 1.75 was used to assess the trap sampling efficiency upon exposure to different current velocities.

  6. Data of evolutionary structure change: 1CANA-1RJ5A [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1CANA-1RJ5A 1CAN 1RJ5 A A SHHWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVS-YDQAT-...1CAN A 1CANA YDQAT--SLRIL...1CAN A 1CANA VHWNT-KYGDF ...1CAN A 1CANA FLKVG-SAKPG ...1CAN A 1CANA LPESL-DYWTY

  7. Metal and trace element sediment assessment from Ribeira do Iguape river, Sao Paulo state, Brazil, by instrumental neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Francisco J.V. de; Quinaglia, Gilson A., E-mail: franciscovc@cetesbnet.sp.gov.br, E-mail: gilsonn@cetesbnet.sp.gov.br [CETESB - Companhia Ambiental do Estado de Sao Paulo, SP (Brazil). ELTA - Setor de Analises Toxicologicas; Favaro, Deborah I.T., E-mail: defavaro@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (LAN/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Laboratorio de Analise por Ativacao Neutronica; Franklin, Robson L.; Ferreira, Francisco J., E-mail: robsonf@cetesbnet.sp.gov.br, E-mail: franciscoj@cetesbnet.sp.gov.br [CETESB - Companhia Ambiental do Estado de Sao Paulo, SP (Brazil). ELAI - Setor de Quimica Inorganica

    2011-07-01

    The watershed region of the Ribeira do Iguape River and the estuarine complex of the Paranagua-Iguape- Cananeia and the various river basins located between this region and the Atlantic Ocean, is known as the Ribeira Valley. The Ribeira do Iguape River runs a total length of approximately 470 km, being the main source of fresh water in the Estuarine Complex of the Iguape-Cananeia-Paranagua (Lagamar). The Ribeira do Iguape River is the last major river in the State of Sao Paulo that has not been altered by dams. During virtually the entire 20th century, the region of the Ribeira Valley was the scene of constant environmental degradation resulting from the intense exploration and refining of lead, zinc and silver ores that were processed in the mines of the region, in a rudimentary way and without any control over environmental impacts. Since 1996, all such activities ceased, however, leaving behind a huge amount of environmental liabilities. This study aims to investigate the presence and concentration levels of metals and semi-metals arsenic (As), cadmium (Cd) and lead (Pb) in the sediment and water of aquatic systems of Ribeira do Iguape River and its tributaries, for an environmental assessment and monitoring of the region. The determination of these elements was carried out by GF AAS technique for water samples and ICP OES for the sediment samples. This study also assessed the occurrence of some major (Ca, Fe, K and Na), trace (As, Ba, Br, Co, Cs, Hf, Rb, Sb, Sc, Se, Ta, Th, U, Zn) and rare earth elements (La, Ce, Eu, Nd, Sm, Lu, Tb and Yb) by Neutron Activation Analysis (NAA). Validation of both methodologies, according to precision and accuracy, was done by reference material analyses. The results obtained for As, Cd and Pb were compared to the Canadian Environmental oriented values (TEL and PEL). The results obtained for multielemental analyses in the sediment samples were compared to UCC values (Upper Continental Crust). (author)

  8. Sedimentation processes and beach morphodynamics active at the Doce River mouth, Espírito Santo State, Brazil

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    Jacqueline Albino

    2010-12-01

    Full Text Available The coastal sedimentation model in the Doce River mouth and surroundings extends beyond the hydraulic jetty effect created by its stream-flow. During flooding, marine sediments transported by longshore currents are retained on the updrift side, causing strandline progradation. As the longshore current direction varies, local depositional and erosional effects can be produced and identified laterally within beach profiles from north and south of the Doce River mouth area. Sedimentological studies carried out in this river, beach and adjacent inner continental shelf sands showed that, at present, the influence of Doce River sediments is restricted to the area surrounding its mouth. Meanwhile, beach morphodynamic stages and present-day coastal-plain processes of sedimentation are directly affected by the Doce River discharge as a natural continuation of the Quaternary geological evolution of the area.A sedimentação costeira adjacente à desembocadura do Rio Doce, Espírito Santo, Brasil destaca o efeito de jato hidráulico desempenhado pela descarga fluvial. Por ocasião da enchente, os sedimentos marinhos transportados pela corrente longitudinal são represados a barlamar da desembocadura, causando progradação nas praias adjacentes e erosão nas praias situadas a sotamar da desembocadura fluvial. Com a inversão do rumo da deriva litorânea, os processos erosivos e construtivos se invertem. Estudos sedimentológicos realizados nos sedimentos do rio, das praias e da plataforma continental interna adjacente à desembocadura, indicam que a contribuição da carga do rio Doce é atualmente restrita às áreas imediatamente vizinhas. Contudo, a tipologia das praias e os processos de sedimentação da planície costeira são diretamente afetados pela descarga do rio Doce, sendo a continuação dos processos de sedimentação identificada na evolução geológica da área.

  9. Determination of natural radionuclides, U, Th-232, Ra-226, Ra-228, Pb-210 and K-40 in sediments from CananÉIa-Iguape System, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Jesus, Gleyka J.D.; Chiozzini, Vitor G.; Saueia, Cátia H.R.; Nisti, Marcelo B.; Braga, Elisabete S.; Fávaro, Deborah I.T., E-mail: gjdjesus@ipen.br, E-mail: chsaueia@ipen.br, E-mail: mbnisti@ipen.br, E-mail: defavaro@ipen.br, E-mail: vitor.chio@usp.br, E-mail: edsbraga@usp.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Universidade de São Paulo (USP), SP (Brazil). Instituto Oceanográfico

    2017-07-01

    The Cananéia-Iguape estuarine-lagoon complex, located in the south of São Paulo State, Brazil, is a protected area recognized by UNESCO as part of the Biosphere Reserve, due to its importance as a natural ecosystem. However, along the years, the mining activities in the region affected the river basin, to such an extent that contamination was observed for As, Cu, Pb and Zn. Since the mining activities can also enhance the levels of natural radioactivity in the sediments, this study aimed to determine the activity concentration of the natural radionuclides (K-40, U, Ra-226, Pb-210, Th-232 and Ra-228) in 34 bottom sediments samples collected in the Cananéia-Iguape system. The samples were measured by gamma spectrometry, using a HPGe for the determination of K-40, Ra-226, Pb-210 and Ra-228. The concentration of U and Th-232 was determined by instrumental neutron activation analysis. The activity concentration of K-40 varied from 119 ± 17 to 522 ± 74 Bq kg{sup -1}; U-238 varied from 0.31 ± 0.05 to 5.8 ± 0.3 mg kg{sup -1}; Ra-226 varied from 3.7 ± 0.3 to 43.3 ± 1.5 Bq kg{sup -1}; Pb-210 varied from 5.8 ± 2.6 to 118 ± 12 Bq kg{sup -1}; Th-232 varied from 0.67 ± 0.02 to 16.6 ± 0.4 mg kg{sup -1} and Ra-228 varied from 3.5 ± 0.6 to 64.9 ± 2.4 Bq kg{sup -1}. These results were compared with literature values for the region, indicating that they are the background of the region and no contamination was observed from NORM (Naturally Occurring Radioactive Material) industries. (author)

  10. Enrichment factor and geoaccumulation index applied to sediment samples from the Guarapiranga reservoir, Brazil, for metal and trace element assessment

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, Guilherme M.; Figueiredo, Ana M.G.; Silva, Paulo S.C.; Favaro, Deborah I., E-mail: defavaro@ipen.b, E-mail: anamaria@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao Neutronica; Franklin, Robson L., E-mail: robsonf@cetesbnet.sp.gov.b [Companhia de Tecnologia de Saneamento Ambiental (EAAI/CETESB), Sao Paulo, SP (Brazil). Lab. de Quimica Inorganica e Radioatividade

    2011-07-01

    This study aims to assess sediment contamination by metals and other trace elements in five sampling points of the Guarapiranga Reservoir. Two collection campaigns were undertaken and the samples were analyzed by Instrumental Neutron Activation Analysis (INAA) in order to determine the following elements: major (Fe, K and Na), trace (As, Ba, Br, Co, Cr, Cs, Hf, Rb, Sb , Sc, Ta, Tb, Th, U and Zn) and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu). Soil samples were collected in the Guarapiranga Park, located next to the reservoir. Composite top soil samples (0-20 cm) were collected in lines across the park at every 30m and were also analyzed by INAA. EF values was calculated using Sc as the conservative element for normalization purposes and soil from Guarapiranga region was used as background levels for the elements analyzed. EF > 1.5 were obtained for the elements As, Sb and Zn, with highest values for Zn (1.6sediments can be classified as moderately contaminated. (author)

  11. Bioprospecting from cultivable bacterial communities of marine sediment and invertebrates from the underexplored Ubatuba region of Brazil.

    Science.gov (United States)

    Tangerina, Marcelo M P; Correa, Hebelin; Haltli, Brad; Vilegas, Wagner; Kerr, Russell G

    2017-01-01

    Shrimp fisheries along the Brazilian coast have significant environmental impact due to high by-catch rates (21 kg per kilogram of shrimp). Typically discarded, by-catch contains many invertebrates that may host a great variety of bacterial genera, some of which may produce bioactive natural products with biotechnological applications. Therefore, to utilize by-catch that is usually discarded we explored the biotechnological potential of culturable bacteria of two abundant by-catch invertebrate species, the snail Olivancillaria urceus and the sea star Luidia senegalensis. Sediment from the collection area was also investigated. Utilizing multiple isolation approaches, 134 isolates were obtained from the invertebrates and sediment. Small-subunit rRNA (16S) gene sequencing revealed that the isolates belonged to Proteobacteria, Firmicutes and Actinobacteria phyla and were distributed among 28 genera. Several genera known for their capacity to produce bioactive natural products (Micromonospora, Streptomyces, Serinicoccus and Verrucosispora) were retrieved from the invertebrate samples. To query the bacterial isolates for their ability to produce bioactive metabolites, all strains were fermented and fermentation extracts profiled by UP LC-HRMS and tested for antimicrobial activity. Four strains exhibited antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus warneri.

  12. SPECTROSCOPIC STUDY OF HUMIC SUBSTANCES EXTRACTED FROM WATER, SOIL AND SEDIMENT SAMPLES OF THE PATOS LAKE, MS, BRAZIL

    Directory of Open Access Journals (Sweden)

    Júlio César R Azevedo, Mariana Carolina Teixeira e Jorge Nozaki

    2006-06-01

    Full Text Available Humic substances (HSs were extracted from samples collected in 4 areas of sediment, water and soil from Patos´ lake - MS. The humic substances from the water were extracted according to Thurman and Malcolm methods (1981 and, those from sediment and soil were extracted as proposed by the International Society of Humic Substances (ISHS. The following spectroscopic techniques were performed in this study: ultraviolet and visible (UV-Vis and fluorescence emission. The effects of ambient factors as concentration and variations of pH in fluorescence emission of humic substances (fulvic and humic acids were evaluated. It was observed that the UV-Vis technique and the intensity of emitted fluorescence from humic substances extracted from water has shown linear correlation with the variation of fulvic acid (7.3 the 35.5 mg L-1 and of humic acid (4.8 the 23.9 mg L-1 concentrations, considering just dissolved organic carbon. However, for pH variation (acid, neutral and alkaline media significant variations were not observed in both, UV-Vis and fluorescence emission techniques.

  13. 75 FR 52818 - R.J. Corman Railroad Company/Central Kentucky Lines, LLC-Trackage Rights Exemption-CSX...

    Science.gov (United States)

    2010-08-27

    ... Surface Transportation Board R.J. Corman Railroad Company/Central Kentucky Lines, LLC-- Trackage Rights... Transportation, Inc. (CSXT) has agreed to grant additional limited overhead trackage rights \\1\\ to R.J. Corman... Louisville, Ky., a distance of approximately 17 miles.\\2\\ \\1\\ The original rights were obtained by R.J...

  14. 75 FR 75205 - R.J. Corman Railroad Company/Central Kentucky Lines, LLC-Trackage Rights Exemption-CSX...

    Science.gov (United States)

    2010-12-02

    ... Surface Transportation Board R.J. Corman Railroad Company/Central Kentucky Lines, LLC-- Trackage Rights...,\\1\\ CSX Transportation, Inc. (CSXT) has agreed to grant limited overhead trackage rights to R.J... original notices, R.J. Corman Railroad Company/Central Kentucky Lines, LLC--Acquisition and Operation...

  15. Liquid chromatography-atmospheric pressure photoionization-Orbitrap analysis of fullerene aggregates on surface soils and river sediments from Santa Catarina (Brazil).

    Science.gov (United States)

    Sanchís, Josep; Oliveira, Luis Felipe Silva; de Leão, Felipe Baptista; Farré, Marinella; Barceló, Damià

    2015-02-01

    In the present work, a new analytical approach is proposed for the analysis of seven fullerenes (C₆₀, C₇₀, N-methylfulleropyrrolidine, [6,6]-phenyl C₆₁ butyric acid methyl ester, [6,6]-thienyl C61 butyric acid methyl ester, C60 pyrrolidine tris-acid ethyl ester and [6,6]-phenyl C₇₁ butyric acid methyl ester fullerenes) in soils and sediments. This procedure combines an ultrasound-assisted solvent extraction (UAE) with toluene followed by liquid chromatography (LC), using a pyrenylpropyl group bonded silica based column, coupled to a high-resolution mass spectrometer (HRMS) using atmospheric pressure photoionisation (APPI) in negative ion mode. The analytical performance for fullerene separation of the pyrenylpropyl group bonded silica column was compared to the C18 column. For the ultra-trace analysis of fullerenes in complex environmental samples, the use of the APPI source and the use of the electrospray ionisation (ESI) source were compared. Using this approach for the analysis of fullerenes in complex matrices, a series of advantages, in terms of sensitivity and specificity, have been demonstrated. The method limits of detection (MLOD) and the method limits of quantification (MLOQ) in soils and sediments ranged from 0.022 to 0.39 pg/g and from 0.072 to 1.3 pg/g, respectively. Recoveries were between 68 and 106%. The analytical method was applied in order to assess the occurrence of selected fullerenes in 45 soils of Sul Catarinense (Santa Catalina State, Brazil) and 15 sediments from the Tubarão River, presenting different pressures of contamination: a coal-combustion power plant, car exhaust, coal mining industry and wastewater effluents. C₆₀ and C₇₀ fullerenes have been detected at concentrations ranging from the MLOD to 0.150 ng/g. None of the functionalised fullerenes were detected in any of the samples. Combustion processes, in particular car exhaust, were identified as the main source of fullerenes. However, the potential

  16. Assessment of DDT and Metabolites in Soil and Sediment of Potentially Contaminated Areas of Belém, Amazon Region, Brazil.

    Science.gov (United States)

    Rodrigues, Andreia Oliveira; de Souza, Larissa Costa; da Silva Rocha, Cássia Christina; da Costa, Amilton Cesar Gomes; de Alcântara Mendes, Rosivaldo

    2017-07-01

    The aim of this study was to evaluate the distribution of DDT and metabolites in surface soils and soil profiles from two areas containing deposits of obsolete pesticides in Belém, Amazon Region, Brazil. DDT and metabolites were extracted by microwave assisted extraction and analyzed by gas chromatography with electron capture detection. Concentrations of total DDT in surface soil samples ranged from 64.22 mg kg-1 in area 1 (A1) to 447.84 mg kg-1 in area 2 (A2). Lower levels were found in soil profiles than at the surface (6.21-21.17 mg kg-1 in A1 and 36.13-113.66 mg kg-1 in A2). pp'-DDT, pp'-DDE and pp'-DDD were detected in sediments at levels of 2.01, 0.96 and 0.35 mg kg-1, respectively. The ratio (DDE + DDD)/ΣDDT was low indicating the recent introduction of DDT to the environment in the two study areas, through the volatilization and atmospheric deposition of the obsolete pesticides.

  17. Determination of hydrocarbons transported by urban runoff in sediments of São Gonçalo Channel (Pelotas - RS, Brazil).

    Science.gov (United States)

    Sanches Filho, Pedro J; Böhm, Emerson M; Böhm, Giani M B; Montenegro, Gissele O; Silveira, Lucas A; Betemps, Glauco R

    2017-01-30

    A high concentration of hydrocarbons in the environment is indicative of pollution. To evaluate the effect of hydrocarbons transported by urban runoff, the present study analyzed total petroleum hydrocarbons (TPHs), aliphatic hydrocarbons (AHs), unresolved complex mixture (UCM), and n-alkanes of the sediments of the canal that cross the urban area of Pelotas, Rio Grande do Sul, Brazil. The carbon preference index (CPI), terrigenous/aquatic ratio (TAR), and pristane/phytane ratio were determined. The TPH content ranged from 177,043.7μg·kg-1±13.4% to 5,892,667.0μg·kg-1±5.9%. The total aliphatic content ranged from 116,268.8μg·kg-1±11.1% to 2,393,592.6μg·kg-1±7.7%, indicating chronic contamination of n-alkanes petrogenic and biogenic sources. The levels of hydrocarbons (TPH, AHs, and n-alkanes) were considered relatively high, confirming the effect of urban runoff on the drainage system of cities and their consequent effect on the estuarine region of Patos Lagoon and other water resources. Copyright © 2016 Elsevier Ltd. All rights reserved.

  18. Quantification of Sterol and Triterpenol Biomarkers in Sediments of the Cananéia-Iguape Estuarine-Lagoonal System (Brazil by UHPLC-MS/MS

    Directory of Open Access Journals (Sweden)

    Giovana Anceski Bataglion

    2016-01-01

    Full Text Available Sterols and triterpenols present in sedimentary cores from 12 stations along the Cananéia-Iguape estuarine-lagoonal system were investigated by ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS. Ten sterols and three triterpenols were identified and quantified, indicating both natural and anthropogenic sources. The relative distributions of sterol and triterpenol showed that the study area is submitted to organic matter (OM from the Ribeira de Iguape River, seawater, surrounding vegetation, and plankton production. The contribution of these sources depends on the region of the estuarine-lagoonal system and the depth of sediment. Regarding anthropogenic sources, only the samples submitted to freshwater flow from the Ribeira de Iguape River presented concentration of coprostanol higher than the threshold value and diagnostic ratios, coprostanol/(coprostanol + cholestanol and coprostanol/cholesterol, that indicate moderate contamination by domestic sewage in that area of the estuarine-lagoonal system. Therefore, the approach used herein identified the OM sources and its transport along the Cananéia-Iguape estuarine-lagoonal system (Brazil, which is a complex of lagoonal channels located in a United Nations Educational, Scientific and Cultural Organization (UNESCO Biosphere Reserve.

  19. NAA: metals in surface waters, margin sediments, forage and cattle hair in flood plains of the Rio Doce basin, Minas Gerais, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Vasconcelos, Maria Adelaide R.V., E-mail: madelaide@fumec.br [Universidade Fundacao Mineira de Educacao e Cultura (FUMEC), Belo Horizonte, MG (Brazil). Mestrado em Construcao Civil, Meio Ambiente; Barbosa, Ana Flavia S.; Ruckert, Gabriela V., E-mail: mariavasc@unilestemg.br [Centro Universitario do Leste de Minas Gerais (UnilesteMG), Coronel Fabriciano, MG (Brazil). Mestrado em Engenharia Industrial; Menezes, Maria Angela B.C.; Silva, Maria Aparecida, E-mail: menezes@cdtn.br, E-mail: cida@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Oliveira, Arno H. de, E-mail: heeren@nuclear.ufmg.br [Universidade Federal de Minas Gerais (UFMG), Departamento de Engenharia Nuclear Belo Horizonte, MG (Brazil)

    2011-07-01

    Metals are toxic and can cause damage to human health when they accumulate in the food chain. The aim of this study was to determine Al, As, Ba, Br, Ca, Ce, Cl, Co, Cr, Cs, Eu, Fe, Hg, K, Mg, Mn, Na, Rb, Sb, Sc, Ta, Th, Ti, U, V and Zn in different samples: surface waters, margin sediments, forages and cattle hairs in the region of the Rio Doce basin. The metals were analyzed by Neutron Activation Analysis - NAA at the Centre for Development of Nuclear Technology of the National Commission of Nuclear Energy - CDTN / CNEN. The sampling sites were taken at two points: P1- (Pingo D'agua - city, Ponte Queimada, in a no industrial area) and P2 - (Santana do Paraiso city, industrial and pasture areas, subject to frequent floods). The samples were collected in different seasons: July 2009 (dry season - winter) and February 2010 (rainy season - summer). These points were strategically chosen because P1 is located into the Parque Estadual do Rio Doce, considered a no industrial pollution region. Contrariwise, P2 is located in a region of high concentration of industries. In (P2) the Doce River receives its most polluted affluent upstream the Piracicaba River which is charged of several pollutants of industries of Steel Valley region, Brazil. In general, the results showed higher concentrations of the elements in P2 riverside area of livestock production and subject to flood. (author)

  20. Sources and distribution of polycyclic aromatic hydrocarbons (PAHs) and organic matter in surface sediments of an estuary under petroleum activity influence, Todos os Santos Bay, Brazil.

    Science.gov (United States)

    Nascimento, Rodrigo A; de Almeida, Marcos; Escobar, Narayana C F; Ferreira, Sergio L C; Mortatti, Jefferson; Queiroz, Antônio F S

    2017-06-30

    The present study evaluated the origin and distribution of polycyclic aromatic hydrocarbons (PAHs) and the organic matter (OM) in the surface sediment of the São Paulo River estuary, Todos os Santos Bay (TSB), Brazil. The samples were collected in the rainy (CP1) and the dry (CP2) seasons. We analyzed the 16 PAHs from the United States Environmental Protection Agency (US EPA) priority pollutant list, total organic carbon (TOC), total nitrogen (N), and stable carbon isotope (δ13C). The total concentration of PAHs ranged from 11.45±1.28 to 1825.35±107.96ngg-1, while TOC ranged from 3.8 to 27.7gkg-1. CP1 showed the highest concentrations for all parameters. The δ13C ratio indicated terrigenous OM (-23.81 to -26.63‰). The TOC/N ratio (C/N) indicated transitional OM (12.32 to 24.39), in addition to the continental origin. The diagnostic ratios of PAHs origin revealed only pyrolytic source, although close to areas with a history of petroleum contamination. Copyright © 2017. Published by Elsevier Ltd.

  1. Dynamic and resuspension by waves and sedimentation pattern definition in low energy environments: guaíba lake (Brazil

    Directory of Open Access Journals (Sweden)

    João Luiz Nicolodi

    2013-03-01

    Full Text Available Little research has been undertaken into sediment dynamics in lakes, and most of it only analyses particular aspects such as the texture of the sediments. In this study, the characteristics of the wave field in Guaíba Lake are investigated. The parameters significant wave height (Hs, period (T and direction of wave propagation are examined together with their relation to the resuspension of sediments at the bottom. For this purpose, the mathematical model SWAN (Simulating Waves Nearshore has been validated and employed. The results pointed out that the highest waves modeled reached 0.55 m at a few points in the lake, particularly when winds were blowing from the S and SE quadrants with an intensity over 7 m.s-1. Generally speaking, waves follow wind intensity and direction patterns, and reach maximum height in about 1 to 2 hours after wind speed peaks. Whenever winds were stronger, waves took some 2 hours to reach 0.10 m. However, with weak to moderate winds, the waves took around 3 hours to achieve this value in significant wave height. In addition to speed and direction, wind regularity proved relevant in generating and propagating waves on Lake Guaíba. In conclusion the lake's sediment environments were mapped and classified as follows: 1 Depositional Environments (51% of the lake; 2 Transitional Environments (41%; and 3 Erosional or Non-Depositional Environments (8%. As a contribution to the region's environmental management, elements have been created relating to the concentration of suspended particulate matter.Pesquisas referentes à dinâmica sedimentar em lagos são escassas e a maioria trata da distribuição e textura dos sedimentos, sendo raras aquelas que fazem menção ao padrão de ondas e suas relações com a ressuspensão destes sedimentos e suas consequências. Este trabalho analisa as características das ondas incidentes no Lago Guaíba (Brasil por meio da utilização do SWAN (Simulating Waves Nearshore e suas rela

  2. Efeitos da poluição do ar na função respiratória de escolares, Rio de Janeiro, RJ Efectos de la polución del aire en la función respiratoria de escolares, Rio de Janeiro, Sureste de Brasil Effect of air pollution on lung function in schoolchildren in Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Hermano Albuquerque de Castro

    2009-02-01

    Full Text Available OBJETIVO: Analisar a associação entre exposição diária à poluição do ar e função respiratória de escolares. MÉTODOS: Estudo de painel com uma amostra aleatória de 118 escolares (seis a 15 anos de idade da rede pública do Rio de Janeiro (RJ, residentes até 2 km do local do estudo. Dados sobre características das crianças foram obtidos por questionário, incluindo o International Study of Asthma and Allergies in Childhood. Exames diários de pico de fluxo foram realizados para medir a função respiratória. Dados diários dos níveis de PM10, SO2, O3, NO2 e CO, temperatura e umidade foram fornecidos por um monitor móvel. As medidas repetidas de função respiratória foram associadas aos níveis dos poluentes por meio de modelo multinível ajustado por tendência temporal, temperatura, umidade do ar, exposição domiciliar ao fumo, ser asmático, altura, sexo, peso e idade das crianças. RESULTADOS: O pico de fluxo expiratório médio foi 243,5 l/m (dp=58,9. A menor média do pico de fluxo expiratório foi 124 l/m e a maior 450 l/m. Para o aumento de 10 µg/m³ de PM10 houve uma diminuição de 0,34 l/min na média do pico de fluxo no terceiro dia. Para o aumento de 10 µg/m³ de NO2 houve uma diminuição entre 0,23 l/min a 0,28 l/min na média do pico de fluxo após a exposição. Os efeitos do CO e do SO2 no pico de fluxo dos escolares não foram estatisticamente significativos. O O3 apresentou um resultado protetor: o aumento de 10 µg/m³ de O3 estaria associado, um dia depois da exposição, a aumento de 0,2 l/min na média da função respiratória. CONCLUSÕES: Mesmo dentro de níveis aceitáveis na maior parte do período, a poluição atmosférica, principalmente o PM10 e o NO2, esteve associada à diminuição da função respiratória de crianças residentes no Rio de Janeiro.OBJETIVO: Analizar la asociación entre exposición diaria a la polución del aire y función respiratoria de escolares. MÉTODOS: Estudio de

  3. Critérios de admissão e continuidade de cuidados em centros de atenção psicossocial, Rio de Janeiro, RJ Criterios de admisión y continuidad de cuidados en centros de atención psicosocial, Rio de Janeiro, Sureste de Brasil Criteria for admission and continuity of health care in psychosocial healthcare services, City of Rio de Janeiro, Southeastern Brazil

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    Maria Tavares Cavalcanti

    2009-08-01

    Full Text Available OBJETIVO: Analisar os critérios de admissão, encaminhamento e continuidade de cuidado a pacientes utilizados pelas equipes dos centros de atenção psicossocial. MÉTODOS: Pesquisa qualitativa com avaliação participativa realizada em três centros de atenção psicossocial do município do Rio de Janeiro (RJ em 2006. Foram sorteados 15 casos admitidos e 15 casos encaminhados dentre os pacientes admitidos para tratamento nos seis meses anteriores ao início da pesquisa. Os critérios apontados pela equipe para a admissão do paciente para tratamento ou encaminhamento foram analisados a partir de um roteiro estruturado. A análise da continuidade de cuidados baseou-se em pesquisa em prontuário, informações da equipe e dos próprios pacientes e/ou familiares seis meses após a absorção ou encaminhamento do paciente. RESULTADOS: Os pacientes admitidos apresentavam diagnóstico de psicose (esquizofrenia, história de internações prévias, funcionamento social pobre e rede de apoio pequena e os pacientes encaminhados apresentavam transtornos ansiosos e depressivos, boa adesão a tratamento ambulatorial, bom funcionamento social e presença de rede social. Quanto à continuidade de cuidados, oito pacientes em 27 tiveram destino desconhecido. Quanto aos encaminhamentos, dos 13 pacientes encaminhados a ambulatórios da rede, sete permaneceram em tratamento, dois retornaram aos CAPS e quatro tiveram destino desconhecido. CONCLUSÕES: Os centros admitem pacientes que se encaixam na definição de um transtorno mental severo e persistente. A continuidade de cuidado foi apontada como problema, provavelmente devido à dificuldade de acompanhar os pacientes na comunidade.OBJETIVO: Analizar los criterios de admisión, encaminamiento y continuidad de cuidado a pacientes utilizados por los equipos de los centros de atención psicosocial. MÉTODOS: Investigación cualitativa con evaluación participativa realizada en tres centros de atenci

  4. Análise espacial da dengue e o contexto socioeconômico no município do Rio de Janeiro, RJ Análisis espacial del dengue y el contexto socioeconómico en el municipio de Rio de Janeiro, Sureste de Brasil Spatial analysis of dengue and the socioeconomic context of the city of Rio de Janeiro (Southeastern Brazil

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    Andréa Sobral de Almeida

    2009-08-01

    Full Text Available OBJETIVO: Analisar a epidemia de dengue em relação ao contexto socioeconômico segundo áreas geográficas. MÉTODOS: Foi realizado estudo ecológico no município do Rio de Janeiro (RJ, em áreas delimitadas como bairros, a partir de informações de casos de dengue notificados em residentes no município. Foi calculada a taxa de incidência média de dengue entre as semanas epidemiológicas: 48ª de 2001 a 20ª de 2002. A ocorrência de dengue foi correlacionada com variáveis socioeconômicas utilizando-se o coeficiente de correlação de Pearson. Utilizou-se o Índice de Moran global e local para avaliar a autocorrelação espacial da dengue e das variáveis correlacionadas significativamente com a doença. O modelo de regressão linear múltipla e o modelo espacial condicional auto-regressivo foram usados para analisar a relação entre dengue e contexto socioeconômico. RESULTADOS: Os bairros da zona oeste do município apresentaram elevadas taxas de incidência média de dengue. Apresentaram correlação significativa as variáveis: percentual de domicílios ligados à rede sanitária geral, domicílios com lavadora de roupas e densidade populacional por área urbana. O índice de autocorrelação espacial Moran revelou dependência espacial entre a dengue e variáveis selecionadas. Os modelos utilizados apontaram o percentual de domicílios ligados à rede sanitária geral como única variável associada significativamente à doença. Os resíduos de ambos os modelos revelaram autocorrelação espacial significativa, com índice de Moran positivo (pOBJETIVO: Analizar la epidemia de dengue con relación al contexto socioeconómico según áreas geográficas. MÉTODOS: Fue realizado estudio ecológico en el municipio de Río de Janeiro (Sureste de Brasil, en áreas delimitadas como urbanizaciones, a partir de informaciones de casos de dengue notificados y residentes en el municipio. Fue calculada la tasa de incidencia promedio de dengue

  5. Avaliação do estado de assoreamento do reservatório de Cachoeira Dourada (GO/MG / Evaluation of Sedimentation State in Cachoeira Dourada Reservoir (GO/MG, Brazil

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    João Batista Pereira Cabral

    2009-04-01

    Full Text Available This research analyzed the degree of sedimentation in Cachoeira Dourada reservoir Brazil, belongingto the Paranaíba hydrologic catchment basin. Were evaluated bottom sediments of the lake, in an areaof 74 km2. Were considered particle and bathymetric parameters. The results, presented on the maps,showed the distribution of the particles chacteristics and allowed to estimate the volume of sediments.The bottom deposits are essentially constituted of silt and clay in the portion near the dike; of fine andvery fine sandy material in the middle sector of the reservoir and, in the beginning of the reservoir, wehave since silt just large sand. By comparison of topographic data, since the construction of the reservoir,with present measured bathymetric data, the Cachoeira Dourada reservoir lost 38.5 % of its originalstoring capacity. The expected reservoir useful life, estimated in this research, is of about 145 years,following this deposition rhythm.

  6. Sedimentation and pedogenic features in a clay deposit in Quadrilátero Ferrífero, Minas Gerais, Brazil

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    Maria-do-Carmo Santos

    2004-03-01

    Full Text Available The clay deposit of Caxambu Hill occurs in a NW/SE oriented graben originated by syntectonic sedimentation during Cenozoic. Four facies were identified (fragmentary, nodular, massive and friable and their differentiation is related to gravity mass-flow processes. The fragmentary facies is composed of extraclast fragments of the local Paleoproterozoic basement and sand size quartz-grains dispersed in a kaolinite-muscovite-goethitehematite matrix. The nodular facies is constituted by lithorelictal and pedorelictal nodules dispersed in a similar matrix as in the fragmentary facies. The massive facies is characterized by quartz grains dispersed in a kaolinite, hematite and goethite matrix with minor amounts of muscovite. The friable facies differs from the massive facies by its channel morphology, higher quartz and kaolinite content and the presence of millimetric clay-balls. The fragmentary facies is considered as deposited during the early stage of opening of the basin. After that, under sub-arid conditions, the slumping of lateritic materials from the surrounding regolith led to the formation of the nodular and massive facies. The friable facies was originated by the action of unidirectional flow that reworking the clayey sediments. The increasing of kaolinite content towards the top is related to the chemical weathering action after the deposition of the sediments.O depósito argiloso do Morro do Caxambu é produto de uma sedimentação Cenozoica sintectônica em um graben de direção NW/SE. Quatro fácies foram identificadas (fragmentária, nodular, maciça e friável e suas diferenciações são relacionadas a processos gravitacionais de fluxo de massa. A fácies fragmentária é constituída por fragmentos extraclastos do embasamento local Paleoproterozoico e, por grãos quartzosos de granulometria areia dispersos em uma matriz de composição caulinita-muscovita-goethita-hematita. A facies nodular é formada por nódulos litoreliquiais e

  7. Chave de identificação para as espécies de Dicotiledôneas arbóreas da Reserva Biológica do Tinguá, RJ, com base em caracteres vegetativos Identification key of the most common woody Dicotyledons from the Tinguá Biological Reserve (State of Rio de Janeiro, Brazil based on vegetative characters

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    Denise Monte Braz

    2004-06-01

    Full Text Available A Reserva Biológica do Tinguá abrange parte dos municípios de Nova Iguaçu, Duque de Caxias, Miguel Pereira e Petrópolis, localizados na região centro-oeste do Estado do Rio de Janeiro, apresentando vegetação predominantemente florestal que integra o complexo vegetacional Mata Atlântica. Embora situada próxima à área urbana, a Reserva do Tinguá apresenta desmatamento quase nulo e grande riqueza florística. Dentre os projetos realizados como parte do programa Linhas de Pesquisa em Mata Atlântica - CNPq, desenvolvida pelo Departamento de Botânica da Universidade Federal Rural do Rio de Janeiro, foi elaborada a chave para a identificação das espécies arbóreas, tendo como base características morfológicas vegetativas, tais como a filotaxia e forma das folhas, presença ou ausência de estípulas, exsudado, lenticelas, indumento e glândulas. A chave apresentada consta de 109 espécies, distribuídas em 35 famílias botânicas.The Tinguá Biological Reserve is located within the boundaries of the municipalitiesof Nova Iguaçu, Duque de Caxias, Miguel Pereira, and Petrópolis, in the central-western region of Rio de Janeiro State, Brazil. Its vegetation is mainly formed by forests belonging to the Atlantic Rain Forest Complex. Although located close to urban areas, the Tinguá Reserve has suffered little deforestation which is assured by its species richness. As one of the several projects for the Reserve, developed by the Botany Department of the Federal University of Rio de Janeiro, an identification key of the woody Dicotyledons is presented, using morphological vegetative characters such as phyllotaxy, leaf shape, stipules, exsudates, lenticells, indument, and glands. A total of 109 species can be identified, belonging to 35 families.

  8. Benthic foraminifera distribution in high polluted sediments from Niterói Harbor (Guanabara Bay, Rio de Janeiro, Brazil

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    Claudia G. Vilela

    2004-03-01

    Full Text Available Dockyards and harbors are recognized as being important locations where sediment-associated pollutants can accumulate, which constitutes an environmental risk to aquatic life due to potential uptake and accumulation of heavy metals in the biota. The aim of this paper is to assess the concentrations and the effects of some heavy metals in the benthic foraminifera assemblage in Niterói Harbor. Low concentrations in the benthic foraminifera as well as the dominance of indicative species such as Ammonia tepida, Buliminella elegantissima and Bolivina lowmani can be associated with an environment under stress. In addition, the occurrence of test abnormalities among foraminifera may represent a useful biomarker for evaluating long-term environmental impacts in a coastal region.Estaleiros e portos são locais reconhecidamente importantes onde poluentes associados a sedimentos podem acumular, constituindo um risco ambiental para a vida aquática devido ao potencial de captação e acumulação de metais pesados na biota. O propósito deste trabalho é avaliar as concentrações e os efeitos de alguns metais pesados na assembléia de foraminíferos bentônicos no Porto de Niterói. Baixas concentrações de foraminíferos bentônicos bem como a dominância de espécies indicativas como Ammonia tepida, Buliminella elegantissima e Bolivina lowmani podem ser associadas a um ambiente sob estresse. A ocorrência de anormalidades entre os foraminíferos pode representar um útil biomarcador para avaliação de impactos ambientais de longo termo em uma região costeira.

  9. Prospecting Anticancer Compounds in Actinomycetes Recovered from the Sediments of Saint Peter and Saint Paul's Archipelago, Brazil.

    Science.gov (United States)

    Ferreira, Elthon G; Torres, Maria da Conceição M; da Silva, Alison B; Colares, Larissa L F; Pires, Karine; Lotufo, Tito M C; Silveira, Edilberto R; Pessoa, Otília D L; Costa-Lotufo, Leticia V; Jimenez, Paula C

    2016-09-01

    Saint Peter and Saint Paul's Archipelago is a collection of 15 islets and rocks remotely located in the equatorial Atlantic Ocean. In this particular site, the present project intended to assess the biodiversity and biotechnological potential of bacteria from the actinomycete group. This study presents the first results of this assessment. From 21 sediment samples, 268 strains were isolated and codified as BRA followed by three numbers. Of those, 94 strains were grown in liquid media and submitted to chemical extractions with AcOEt (A), BuOH (B), and MeOH (M). A total of 224 extracts were screened for their cytotoxic activity and 41 were significantly active against HCT-116 cancer cells. The obtained IC50 values ranged from 0.04 to 31.55 μg/ml. The HR-LC/MS dereplication analysis of the active extracts showed the occurrence of several known anticancer compounds. Individual compounds, identified using HR-MS combined with analysis of the AntiMarin database, included saliniketals A and B, piericidins A and C and glucopiericidin A, staurosporine, N-methylstaurosporine, hydroxydimethyl-staurosporine and N-carbamoylstaurosporine, salinisporamycin A, and rifamycins S and B. BRA-199, identified as Streptomyces sp., was submitted to bioassay-guided fractionation, leading to isolation of the bioactive piericidins A and C, glucopiericidin, and three known diketopiperazines, cyclo(l-Phe-trans-4-OH-l-Pro), cyclo(l-Phe-l-Pro), and cyclo(l-Trp-l-Pro). © 2016 Wiley-VHCA AG, Zürich.

  10. Unusual very positive enrichment of 13C in carbonate sediments deposited in modern hypersaline environment, Lagoa Salgada, Brazil: Indicator of salinity controlled metabolic processes

    Science.gov (United States)

    McKenzie, J. A.; Bovier, C.; Bahniuk, A.; Andersen, M. B.; Vasconcelos, C.

    2016-12-01

    In the geologic record, prolonged intervals of intense δ13C enrichment (>10‰) in carbonate deposits occurred, in particular during the mid-Palaeoproterozoic (2.3-1.9 Ga) and mid-Neoproterozoic (0.8-0.6 Ga) [1]. These anomalously high δ13C values have been interpreted as a global effect due to enhanced burial of organic matter with depleted δ13C values [2]. An alternate interpretation has been proposed whereby the metabolic activity of specific microbial communities, such as methanogens, may have been the source of the strong carbon isotope fractionation [3]. Although such restricted shallow-water environments where methanogens dominate are not widespread today, a unique hypersaline coastal lagoon system, Lagoa Salgada, Brazil provides ideal conditions to study the modern microbial community and its impact on observed extreme δ13C enrichment (up to 20‰) recorded in both in situ stromatolites and carbonate sediments. Here we present our findings and correlations of geochemical data with changing environmental conditions during the last 2600 cal yr BP. This lagoonal system contains highly evaporated water with highest salinities occurring during the dry season. The positive δ13C anomaly shows high and stable values (>14‰) from about 2100 to 1400 cal yr BP. Similar high δ13C values were recorded for the same time period in stromatolite structures growing around the margin of Lagoa Salgada. We propose that the high salinities inhibit photosynthesis, respiration and nitrogen fixation by osmotic stress and, thus, result in increased methanogenesis. We conclude that the combination of methanogenic metabolisms and extreme evaporative conditions is the key factor promoting the production of very high δ13C values observed throughout the lagoonal system, as recorded in both marginal stromatolites and carbonate sediments deposited in the more distal regions of the lagoon. Such unusual environments may have been more widely distributed during the Proterozoic

  11. Análise descritiva dos perfis social, clínico, laboratorial e antropométrico de pacientes com doenças inflamatórias intestinais, internados no Hospital Universitário Clementino Fraga Filho, Rio de Janeiro Descriptive analysis of the social, clinical, laboratorial and anthropometric profiles of inflammatory bowel disease inwards patients from the "Clementino Fraga Filho" University Hospital, Rio de Janeiro, RJ, Brazil

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    Paula Peruzzi Elia

    2007-12-01

    Full Text Available RACIONAL: Estudos epidemiológicos sobre doenças inflamatórias intestinais no Brasil são limitados devido a dificuldades diagnósticas e reduzidas amostras populacionais estudadas. A maioria dos estudos de sua prevalência disponível é composta por amostras de pacientes sob acompanhamento em ambulatório, entretanto a análise do perfil de pacientes com doenças inflamatórias intestinais hospitalizados pode auxiliar na detecção de marcadores preditivos de sua gravidade, o que permitirá intervenções médicas precoces visando a redução da taxa de hospitalização e os gastos do sistema de saúde. OBJETIVOS: Descrever o perfil social, clínico, laboratorial e antropométrico dos pacientes adultos com doenças inflamatórias intestinais internados em hospital universitário terciário. MÉTODOS: Estudo prospectivo com 43 pacientes com doenças inflamatórias intestinais internados nas enfermarias clínicas e cirúrgicas e no setor de emergência do Hospital Universitário Clementino Fraga Filho da Universidade Federal do Rio de Janeiro, RJ. Foram caracterizados dados demográficos, presença de co-morbidades, localização e comportamento clínico, história cirúrgica, manifestações extra-intestinais utilizando-se definições padronizadas. Os resultados laboratoriais foram verificados nos prontuários e as medidas antropométricas foram realizadas durante a entrevista. RESULTADOS: A maioria dos pacientes apresentou doença de Crohn (72,1%, com localização íleo-colônica (60% e com comportamento penetrante (77,4%, enquanto no grupo retocolite ulcerativa idiopática predominou a pancolite (50%. No grupo total de retocolite ulcerativa idiopática, a artralgia foi a manifestação extra-intestinal mais freqüente (44,2% e 97,7% já havia apresentado algum tipo de complicação relacionada à doença de base. Apesar do uso de terapêutica específica para doenças inflamatórias intestinais prévio à hospitalização em 79,1% dos

  12. Cirurgia redutora de volume pulmonar: critérios de seleção de pacientes no Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ Lung volume reduction surgery (LVRS: criteria for selecting patient in Antonio Pedro Hospital, Federal Fluminense University, Niterói city, Rio de Janeiro, Brazil

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    Rodolfo Fred Behrsin

    2003-09-01

    mais de um fator mórbido a contra-indicar o seu procedimento. A maioria dos pacientes com critérios para CRVP, a recusa, com receio do procedimento ou após programas de reabilitação pulmonar. O critério mais significativo que indicou CRVP em um paciente operado foi a presença de enfisema heterogênio bilateral nos lobos superiores.BACKGROUND: Chronic Obstructive Pulmonary Disease (CPOD is an important problem in Brazil and other countries. The clinical treatment of ambulatory patients is now reasonably standardized. Lung volume reduction surgery (LVRS is an alternative of surgical treatment of emphysema (aside from lung transplantation. OBJECTIVES: The aim of this study was to analyse patient selection criteria for LVRS. METHODS: This study was carried out using a sample of 31 patients referred to and given assistance to at the Smoking and Chronic Obstructive Pulmonary Disease Outpatient Ward Antonio Pedro Hospital, who were evaluated to check whether or not they could be eligible for LVRS. Aiming at evaluating the major criteria for eligibility for LVRS, the patients underwent a protocol including standardized anamnesis and physical examination, spirometry with maximum inspiratory and expiratory flow volume curves associated with post-bronchodilatator test, room air arterial blood gases, a six-minute walking test, plain chest roentgenograms and left lateral chest roentgenograms, high-resolution chest computed tomographic scans and lung perfusion scans. Statistical analysis was conducted with description of data proportions. RESULTS: Contraindications to surgery included chronic bronchitis (29% or nine patients, forced expiratory volume in one second (FEV 1 more than 80 percent predicted (13% or four patients, negative consent for surgery (10% or three patients, fibrosis pattern, severe depression and bronchiectasis (two patients each one, solitary pulmonary nodule, severe obesity, severe bullous emphysema, pulmonary hipertension, pulmonary resection history

  13. Ocorrência e Sazonalidade de Muscóides (Diptera, Calliphoridae de Importância Sanitária no Município de Itaboraí, RJ, Brasil

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    José Batista-da-Silva

    2010-04-01

    Abstract. This work was carried out to contribute to the knowledge of Calliphoridae flies (Diptera in Itaboraí, RJ, Brazil and quantify the predominant species of health importance. The flies were captured in eight different points in the city over a one year period, always using fish as bait, separated by species and kept properly in an entomological box in the Laboratório de Transmissores de Leishmaniose (Setor de Entomologia Médica e Forense - IOC / FIOCRUZ, RJ. A total of 1792 Calliphoridae flies were captured, belonging to seven (7 species: Chloroprocta idioidea (Robineau-Desvoidy (0.11%, Chrysomya megacephala (Fabricius (87.94%, Chrysomya albiceps (Wiedemann (6.70%, Chrysomya putoria (Wiedemann (1.23%, Cochliomyia macellaria (Fabricius (0.56%, Hemilucilia segmentaria (Fabricius (0.33%, Lucilia eximia (Wiedemann (3.13%.

  14. Pequeno surto de leishmaniose tegumentar americana em Macuco (Cordeiro - RJ

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    Jacqueline A. Menezes

    1974-06-01

    Full Text Available Por ocasião de um pequeno surto de leishmaniose tegumentar americana em localidade do município de Cordeiro (RJ foram documentados 14 casos. Entre os fatos que chamaram a atenção dos autores estão a alta ocorrência em crianças (57%, a freqüência do componente linfangítico (40%, a tendência à cicatrização espontânea e a distribuição peri-domiciliar dos casos. Um inquérito pela intradermoreação de Montenegro na área de maior concentração de casos, realizado numa fazendo e numa escola, mostrou 17% de reações positivas, 17% de duvidosas e 66% de reações negativas, num total de 117 indivíduos testados. Não foram encontrados casos antigos cicatrizados, o que sugere um foco recente. Discute-se o significado das reações duvidosas.

  15. Natural radionuclides distribution in the shelf and upper slope of southeast Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Cordero, Luisa M.; Figueira, Rubens C.L., E-mail: luisa.cordero@usp.b, E-mail: rfigueira@usp.b [Universidade de Sao Paulo (USP), SP (Brazil). Inst. Oceanografico. Lab. de Quimica Inorganica Marinha; Mahiques, Michel M., E-mail: mahiques@usp.b [Universidade de Sao Paulo (USP), SP (Brazil). Inst. Oceanografico. Lab. de Analise de Materia Organica; Tessler, Moyses G., E-mail: mgtessle@usp.b [Universidade de Sao Paulo (USP), SP (Brazil). Inst. Oceanografico. Lab. de Espectrometria Gama

    2009-07-01

    In recent decades, Oceanography has been using a variety of radionuclides as tracers to understand the ocean dynamic processes, handling and disposal of sediments of seabed. In this context, the determination of natural radionuclides distributions ({sup 238}U, {sup 232}Th and {sup 40}K) has been carried out with sediments samples from the shelf and upper slope off Southeast Brazil using a gamma spectrometry technique. The samples were sliced into strata of 2 cm, dried, ground and properly packed to be analysed. The concentration of activities was performed in a hyperpure Ge detector with a resolution of 1,9 keV for the peak of 1332,3 keV of {sup 60}Co, model GEM50P by EGG and ORTEC. The study area is located between latitudes 28 deg 40'S and 23 deg 00'S and extends from Cabo Frio (RJ) to Cabo de Santa Marta Grande (SC). The activity concentrations varied from 0,6 to 52,8 BqKg{sup -1} for {sup 238}U, from 1,6 to 50,9BqKg{sup -1} for {sup 232}Th and from 65,4 to 873,3 BqKg{sup -1} for {sup 40}K. From these results it is possible to establish a correlation between the depositional area dynamics and the samples size parameters. (author)

  16. The legacy of organochlorine pesticide usage in a tropical semi-arid region (Jaguaribe River, Ceará, Brazil): Implications of the influence of sediment parameters on occurrence, distribution and fate.

    Science.gov (United States)

    Oliveira, André H B; Cavalcante, Rivelino M; Duaví, Wersângela C; Fernandes, Gabrielle M; Nascimento, Ronaldo F; Queiroz, Maria E L R; Mendonça, Kamila V

    2016-01-15

    Between the 1940s and 1990s, immeasurable amounts of organochlorine pesticides (OCPs) were used in endemic disease control campaigns and agriculture in the tropical semi-arid regions of Brazil. The present study evaluated the legacy of banned OCP usage, considering the levels, ecological risk and dependence on sediment physicochemical properties for the fate and distribution in the Jaguaribe River. The sum concentration of OCPs (ΣOCPs) ranged from 5.09 to 154.43 ng·g(-1), comparable to the levels found in other tropical and subtropical regions that have traditionally used OCPs. The environmental and geographical distribution pattern of p,p-DDT, p,p-DDD and p,p-DDE shows that the estuarine zone contained more than 3.5 times the levels observed in the fluvial region, indicating that the estuary of the Jaguaribe River is a sink. The temporal pattern indicates application of dichloro-diphenyl-trichloroethanes (DDTs) in the past; however, there is evidence of recent input of these pesticides. High ecological risk was observed for levels of γ-hexachlorocyclohexanes (γ-HCH) and heptachlor, and moderate ecological risk was observed for levels of DDTs in sediments from the Jaguaribe River. The heptachlor, γ-HCH and hexachlorobenzene (HCB) concentrations depend on the organic and inorganic fractions of sediment from the Jaguaribe River, whereas the p,p-DDE, p,p-DDD, p,p-DDT and α-endosulfan concentrations depend solely on the organic fraction of the sediment.

  17. Virtual Visit - Pedro II, Duque de Caxias, RJ, Brazil / 22 September 2016

    CERN Multimedia

    ATLAS Visitor Centre

    2016-01-01

    No contexto da exposição "Exploradores do Conhecimento" estudantes de escolas do Rio de Janeiro, vêem à Universidade Federal do Rio de Janeiro aonde poderão participar em várias atividades, incluindo uma visita virtual ao Experimento ATLAS no CERN, Suíça

  18. TERMITES (INSECTA: BLATTODEA BUILDINGS IN URBAN LOCATED IN THE MUNICIPALITY OF SEROPÉDICA, RJ

    Directory of Open Access Journals (Sweden)

    V. F. M. Soares

    2017-10-01

    Full Text Available The Termites (Blattodea are insects found between latitudes 52° N e 45° S in temperate climate places, such as in tropical areas. In Brazil, about 300 species were recorded belonging to four families: Kalotermitidae, Rhinotermitidae, Serritermitidae and Termitidae. Considered eusocial, they form colonies of individuals with overlapping generations, cooperative care of offspring and labor division. They develop by paurometabolism and are classified in caste with specific tasks within the colony. The staple food of termites is cellulose, but its source varies according to the species. In natural vegetation areas, termites have got an important ecological role, participating actively in recycling and decomposition of nutrients in ecosystems they inhabit. Besides of the positive contribution in changing soil porosity and aeration. In urban areas, 10% of the species are taken as plagues, causing enormous losses, explicit in cost with prevention, control and repair. Damage caused by termites in urban areas are mainly attributed to the species: Cryptotermes brevis (Walker, 1853, Coptotermes gestroi (Wasmann, 1896 and Nasutitermes corniger (Motschulsky, 1896. Therefore, identifying termites species that colonize urban households in the municipality of Seropédica, RJ, has been the objective of this study. Three urban neighbourhoods: Fazenda Caxias, Boa Esperança and Ecologia, were sampled. Building were inspectied and owners interviewed, totalling twelve residents per block in fifteen blocks per neighbourhood. Proportion of infested buildings with each species was made suing the χ2 test and the probability level, from which a comparison was considered significant, was equal to the risk probability at 5% divided by the number of comparisons. Of the total 540 inspections, 30% of the households had occurrence of termites of which 50% C. brevis, 42% C. gestroi and 8% N. corniger. Coexistence of species within a residence was found in only 3% of the

  19. Mixed carbonate-siliciclastic sedimentation in forebulge grabens: An example from the Ediacaran Bambuí Group, São Francisco Basin, Brazil

    Science.gov (United States)

    Reis, Humberto L. S.; Suss, João F.

    2016-06-01

    Mixed carbonate-siliciclastic successions have been described in multiple Phanerozoic sedimentary settings recording the dynamic interplay of tectonics, eustasy, climate, in situ carbonate production, and variations in siliciclastic sediment supply. The Ediacaran Bambuí 1st-order sequence (i.e., Bambuí Group) covers most of the intracratonic São Francisco basin (southeast Brazil) and encompasses thick packages of carbonate and fine- to coarse-grained siliciclastic strata. Recording a marine foreland basin stage that developed in the São Francisco plate during the Neoproterozoic-early Paleozoic West Gondwana assembly, the Ediacaran deposits unconformably overlie Archean-Paleoproterozoic metamorphic assemblages of the Sete Lagoas basement high and fill a series of kilometer-long grabens in the southern São Francisco basin. Seismic data reveal that these troughs developed through the extensional reactivation of ancient basement structures along with the tectonically driven forebulge uplift of the Sete Lagoas high, in the early evolutionary stages of the Bambuí basin cycle. Based on the detailed description of continuous drill cores of a well recently drilled during hydrocarbon exploration campaigns, we recognized two transgressive-regressive 2nd-order sequences preserved within one of the focused grabens: (i) Sequence 1 includes the glaciogenic deposits of the basal Carrancas Formation that grade upward into the carbonate ramp successions of the Sete Lagoas Formation; (ii) Sequence 2 contains the siliciclastic-dominated and deep water to deltaic strata of the Serra de Santa Helena Formation and passes upward into peritidal carbonates of the Lagoa do Jacaré Formation. These sedimentary successions encompass suites of retrogradational, aggradational, and progradational lower-rank cycles and are bounded by erosional surfaces. Regional seismic interpretation, well data, and the available literature indicate that most of these deposits and their correlatives are

  20. 77 FR 30588 - R.J. Corman Railroad Company/Pennsylvania Lines Inc.-Construction and Operation Exemption-In...

    Science.gov (United States)

    2012-05-23

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Surface Transportation Board R.J. Corman Railroad Company/Pennsylvania Lines Inc.-- Construction and... prior approval requirements of 49 U.S.C. 10901 for R.J. Corman Railroad Company/Pennsylvania Lines Inc...

  1. Effect of sediment composition on methane concentration and production in the transition zone of a mangrove (Sepetiba Bay, Rio de Janeiro, Brazil).

    Science.gov (United States)

    Marinho, C C; Campos, E A; Guimarães, J R D; Esteves, F A

    2012-08-01

    The aim of this research was to evaluate the effect of sediment composition on methane (CH4) dynamics in sediments of different areas in the transition zone between a mangrove and the sea. This research was conducted in a mangrove at Coroa Grande, on the southern coast of Rio de Janeiro. Samples were collected at three stations: (1) region colonised by Rhizophora mangle L. on the edge of the mangrove, (2) region colonised by seagrasses and (3) infra-littoral region without vegetation. Samples were collected from the surface layer of the sediment to determine the concentrations of nutrients (C, N and P) and CH4 concentration and production. We observed that concentrations of CH4 and carbon (C) were significantly higher (p ecotone at Mangrove Coroa Grande is a function of available OM suggesting a possible inhibition of methanotrophy by intense oxygen consumption in the soil surface covered by detritus of Rhizophora mangle vegetation.

  2. Weight-of-evidence on environmental impact assessment of metal contaminated sediments in the São Francisco river (Três Marias - Minas Gerais - Brazil: a case study

    Directory of Open Access Journals (Sweden)

    DF. Almeida

    Full Text Available The weight-of-evidence - WOE approach was used to assess the environmental impact of sediments contaminated by metals in the São Francisco river and one of its tributaries, Consciência creek, both affected by anthropic activities, in the region of Três Marias (Minas Gerais/Brazil. The assessment provided support to a risk management decision. The WOE was based on bulk metal analysis, AVS-SEM assays, elutriate tests, ecotoxicity assays, benthic community assessment and a comparison for the reference area. Brazilian legislation and other available literature were used as criteria to evaluate the lines of evidence. All samples, except for the reference area, presented some contamination. However, geochemical testing for bioavailability studies showed that toxicity is unlikely as suggested by the chemical results. Ecotoxicity and benthic structure studies provided further information to support decision making. Metal acid volatile sulfide formation mechanisms were identified, which can eventually attenuate metal toxicity observed. The removal of active sources of contamination (for example, from tailings dumps associated with Monitoring Natural Recovery could be sufficient to eventually lessen the risk of the biota in São Francisco river sediments.

  3. Miíases Humanas Causadas por Larvas de Cochliomyia hominivorax (Coquerel (Diptera: Calliphoridae em São Gonçalo, RJ, Brasil: Uma Abordagem Sócio-Econômica

    Directory of Open Access Journals (Sweden)

    José Batista-da-Silva

    2011-12-01

    Human Myiasis Caused by Larvae of Cochliomyia hominivorax (Coquerel (Diptera: Calliphoridae in São Gonçalo, RJ, Brazil: Socio-Economic Approach Abstract. This study was carried out between April and September 2008 and reports on the occurrence of human myiasis caused by the New World screwworm, Cochliomyia hominivorax (Coquerel (Diptera: Calliphoridae in São Gonçalo in the state of Rio de Janeiro, Brazil. Liquid or solid vaseline was used to suffocate the larvae, which were then preserved in 70% ethanol and sent to the Instituto Oswaldo Cruz for identification. There were 01 male and 02 females black patients with ages ranging from 36 to 76 and C. hominivorax were identified in all 03 cases of myiasis. Open wounds were the main cause of the parasitosis, whereas poor personal hygiene, the low educational level, alcoholism, bedridden patients were possibly secondary factors.

  4. Viability of microcomputed tomography to study tropical marine worm galleries in humid muddy sediments

    Energy Technology Data Exchange (ETDEWEB)

    Pennafirme, Simone F., E-mail: sipennafirme@gmail.com [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Inst. de Biologia. Dept. de Biologia Marinha; Machado, Alessandra S.; Lima, Inaya; Suzuki, Katia N.; Lopes, Ricardo T., E-mail: machado@lin.ufrj.br, E-mail: inaya@lin.ufrj.br, E-mail: norisuzuki6@yahoo.com.br, E-mail: ricardo@lin.ufj.br [Coordenacao dos Programas de Pos-Graduacao em Engenharia (COPPE/UFRJ), RJ (Brazil). Lab. de Instrumentacao Nuclear

    2013-07-01

    Bioturbation is an ecological process driven by organisms, which transports nutrients and gases from air/water to sediment through their galleries, by the time they feed, burrow and/or construct galleries. This exchange is vital to the maintenance of micro and macrobenthic organisms, mainly in muddy flat environments. Species with distinct galleries could create levels of bioturbation, affecting the benthic interactions. In this sense, it is fundamental developing a non-destructive method that permits identifying/quantifying the properties of these galleries. The recent advances in micro-computed tomography are allowing the high resolution 3D images generation. However, once muddy sediments are rich in organic matter and interstitial water, these would lead to motion artifacts which could, in turn, decrease the accuracy of galleries identification/quantification. In this context, the aim of this study was to develop a protocol which combines laboratory experiments and microtomography analysis in order to generate accurate 3D images of the small marine worm's galleries within humid muddy sediments. The sediment was collected at both muddy flats of Surui's and Itaipu lagoon's mangroves (RJ-Brazil), sieved (0.5mm mesh) and introduced with one individual of the marine worm Laeonereis acuta (Nereididae, Polychaeta) in each acrylic corer holders (4.4cm of internal diameter). High energy microtomography scanner was used to obtain 3D images and the setup calibration was 130 kV and 61 mA. Each acquisition image time was among 4h and 6h. Several procedures of drying remained water inside the cores were performed aiming obtaining images without movement artifacts due to circulating water, and this issue was one of the main studied parameter. In order to investigate possible chemical effects, 2ml of formalin (35%) with menthol were added to the surface of the cores. The results show that although the drying time was appropriated, the chemicals created bubbles

  5. Ecotoxicological assessment of sediments from Tiete river between Salesopolis and Suzano, SP (Brazil); Avaliacao ecotoxicologica de sedimentos do rio Tiete, entre os municipios de Salesopolis e Suzano, SP

    Energy Technology Data Exchange (ETDEWEB)

    Alegre, Gabriel Fonseca

    2009-07-01

    Once introduced into the aquatic environment, many substances can bind or be adsorbed by organic particles in suspension. Depending on the river morphology and hydrological conditions, these particles in suspension containing the contaminants can be deposited along its course, becoming part of the bottom sediments, making them actual sinks and often a source of contamination for the water column and benthic organisms. In the assessment of water, sediment has been one of the most important indicators of the contamination levels in aquatic ecosystems, representing the deposition of contaminants in the environment that occurred over the years and even decades. The Tiete River cross the Sao Paulo state, however, in the metropolitan region of Sao Paulo, the river shows the most severe degradation. In the region of Salesopolis, the waters of the Tiete River are used for public supply, but across the city of Mogi das Cruzes the water quality decreases significantly. Considering the importance of the Tiete river and the sediment for the aquatic biota, this study aimed to evaluate the toxicity of the sediment at five points along the Tiete river, between the cities of Salesopolis and Suzano, Sao Paulo. Four sampling were carried out: two in the summer (rainy season) and two in winter (dry season). The whole sediment was assessed by acute and chronic toxicity tests with Hyalella azteca and Ceriodaphnia dubia, respectively, the elutriate was assessed by chronic toxicity test using C. dubia, while the porewater was evaluated by acute toxicity test with Vibrio fischeri. Samples of river water were also evaluated for chronic toxicity tests with C. dubia. The quantification of metals and hydrocarbons in sediment samples was also carried out in order to correlate the biological effects with the chemical contamination. The obtained results with the whole sediment test indicate Mogi das Cruzes and Suzano cities as the most toxic sites and also as the sites with the highest

  6. Tapetes Microbianos Lisos Estratificados do Brejo do Espinho, RJ, Brasil.

    Directory of Open Access Journals (Sweden)

    Loreine Hermida da Silva e Silva

    2007-07-01

    Full Text Available Bogs are ecosystems found mainly in lower zones that separates inner and outer sandy terraces, and rivers and streams from valleys. These environments are always flooded or suffer seasonal flooding or can stay dry in a extended dry season. Its shallow waters increase the role of the sediment in the maintenance of such ecosystem. The Brejo do Espinho (22º56’ S and 42º14’W is a coastal body of water located 108 km from Rio de Janeiro city where are observed the development of thick microbial mats (about 2-4 cm in thickness. Aiming the characterization of the microbial mats, was made monthly collections in five collects in stations located in the bog borders. Microbial mats samples were taken using a spatula, deposited into plastics vials and later fixed with 4% formaldeid solution. For identification of the cyanobacterias, fresh and permanent slides were made. Smooth layered microbial mats present in subtidal and intertida regions are composed by thin layers with different colors: green, red and brown, who show also distinct cyanobacterialcomposition. These structures show stratus of cohesive lamina with low lithification. Analysis revealed 27 species of cyanobacterias. Chroococcaceae Nägeli 1849 family was the main family found with 37% of the total frequency followed by Phormidiaceae Anagnostidis & Komárek 1988 family with 18,5%, Synechococcaceae Komárek & Anagnostidis 1995 family with 11,1%, Pseudanabaenaceae Anagnostidis & Komárek 1988 family with 11,1%, Entophysalidaceae Geitler1925 family with 7,4%, Schizothricaceae Elenkin 1934 family with 7,4% and Oscillatoriaceae Gomont 1892 family with 7,4%. The domain of cyanobacterias in the Brejo do Espinho reflects its general plasticity that allows them to adapt to hostile conditions of the environment.

  7. Ocorrência e Sazonalidade de Muscóides (Diptera, Calliphoridae de Importância Sanitária no Município de Itaboraí, RJ, Brasil

    Directory of Open Access Journals (Sweden)

    José Antonio Batista-da-Silva

    2010-04-01

    Full Text Available Este trabalho teve como objetivo contribuir com o conhecimento da entomofauna de Calliphoridae (Diptera no município de Itaboraí, RJ, Brasil e quantificar as espécies mais predominantes de importância sanitária. As moscas foram capturadas em oito diferentes pontos no período de um ano, usando sempre isca de peixe. Após triagem, as espécies foram separadas por espécie e inseridas na coleção entomológica do Laboratório de Transmissores de Leishmaniose (Setor de Entomologia Médica e Forense do Instituto Oswaldo Cruz - IOC/FIOCRUZ. Foram capturadas 1792 moscas pertencentes a sete (7 espécies da família Calliphoridae: Chloroprocta idioidea (Robineau-Desvoidy (0,11%, Chrysomya megacephala (Fabricius (87,94%, Chrysomya albiceps (Wiedemann (6,70%, Chrysomya putoria (Wiedemann (1,23%, Cochliomyia macellaria (Fabricius (0,56%, Hemilucilia segmentaria (Fabricius (0,33%, Lucilia eximia (Wiedemann (3,13%.Occurrence and seasonality of muscoid (Diptera, Calliphoridae of public healthimportance in Itaboraí (RJ, BrazilAbstract. This work was carried out to contribute to the knowledge of Calliphoridae flies (Diptera in Itaboraí, RJ, Brazil and quantify the predominant species of health importance. The flies were captured in eight different points in the city over a one year period, always using fish as bait, separated by species and kept properly in an entomological box in the Laboratório de Transmissores de Leishmaniose (Setor de Entomologia Médica e Forense - IOC / FIOCRUZ, RJ. A total of 1792 Calliphoridae flies were captured, belonging to seven (7 species: Chloroprocta idioidea (Robineau-Desvoidy (0.11%, Chrysomya megacephala (Fabricius (87.94%, Chrysomya albiceps (Wiedemann (6.70%, Chrysomya putoria (Wiedemann (1.23%, Cochliomyia macellaria (Fabricius (0.56%, Hemilucilia segmentaria (Fabricius (0.33%, Lucilia eximia (Wiedemann (3.13%.

  8. Chronology of anthropogenic impacts reconstructed from sediment records of trace metals and Pb isotopes in Todos os Santos Bay (NE Brazil).

    Science.gov (United States)

    Andrade, R L B; Hatje, V; Masqué, P; Zurbrick, C M; Boyle, E A; Santos, W P C

    2017-12-15

    The evolution of the impacts of anthropogenic activities in Todos os Santos Bay was evaluated by profiles of trace metals and Pb isotopes determined in sediment cores. Fluxes of metals increased up to 12, 4 and 2 times for Cu, Pb, and Zn, respectively, compared to those recorded in the beginning of the 20th century. Stable Pb isotopes identified a decommissioned lead smelter and burning of fossil fuels as the main sources of Pb. Most metals showed minor to moderate enrichment factors (EF<4), but Cu and Pb were highly enriched (EF=28 and 6, respectively) at the Aratu harbor. Temporal changes in sediments were associated to different activities, namely Pb smelting, burning of fossil fuels, maritime traffic, petroleum related activities, inputs of domestic effluents, and changes in land uses. The effects of the implementation of environmental policies to improve the waters of the bay could not be identified in the evaluated cores. Copyright © 2017 Elsevier Ltd. All rights reserved.

  9. Distribution and ecotoxicology of bioavailable metals and As in surface sediments of Paraguaçu estuary, Todos os Santos Bay, Brazil.

    Science.gov (United States)

    Pereira, Taís de S; Moreira, Ícaro T A; de Oliveira, Olívia M C; Rios, Mariana C; Filho, Wilton A C S; de Almeida, Marcos; de Carvalho, Gilson Correia

    2015-10-15

    Surface sediments collected in the intertidal zone of Paraguaçu estuary in July, 2013, were analyzed for organic matter, nitrogen, phosphorus, grain size fractions and partial concentrations of 16 metals. The USEPA 3051A method and ICP-OES and CV-AAS techniques were chosen to metal analysis. Pollution indices (EF, Igeo and PIN) and a comparison with sediment quality guidelines (UET, ERL, ERM, TEL and PEL of NOAA) were conducted in order to evaluate the potential metal impacts over the area. Principal Component Analysis (PCA) and Pearson correlation results showed the importance of organic matter content and the fine-grained fraction of sediments on the control of the bioavailable metals distribution. The Paraguaçu estuary already has anthropogenic enrichment relative to the background level, especially for Mn, whose values exceeded almost 30 times the background at one site (Mn: 1197.30 mg kg(-1)). However, metal levels are still below the reference values with the exception of Hg at one site (Hg: 0.25 mg kg(-1), exceeded TEL and ERL). Copyright © 2015 Elsevier Ltd. All rights reserved.

  10. Rj4, a Gene Controlling Nodulation Specificity in Soybeans, Encodes a Thaumatin-Like Protein But Not the One Previously Reported.

    Science.gov (United States)

    Tang, Fang; Yang, Shengming; Liu, Jinge; Zhu, Hongyan

    2016-01-01

    Rj4 is a dominant gene in soybeans (Glycine max) that restricts nodulation by many strains of Bradyrhizobium elkanii. The soybean-B. elkanii symbiosis has a low nitrogen-fixation efficiency, but B. elkanii strains are highly competitive for nodulation; thus, cultivars harboring an Rj4 allele are considered favorable. Cloning the Rj4 gene is the first step in understanding the molecular basis of Rj4-mediated nodulation restriction and facilitates the development of molecular tools for genetic improvement of nitrogen fixation in soybeans. We finely mapped the Rj4 locus within a small genomic region on soybean chromosome 1, and validated one of the candidate genes as Rj4 using both complementation tests and CRISPR/Cas9-based gene knockout experiments. We demonstrated that Rj4 encodes a thaumatin-like protein, for which a corresponding allele is not present in the surveyed rj4 genotypes, including the reference genome Williams 82. Our conclusion disagrees with the previous report that Rj4 is the Glyma.01G165800 gene (previously annotated as Glyma01g37060). Instead, we provide convincing evidence that Rj4 is Glyma.01g165800-D, a duplicated and unique version of Glyma.01g165800, that has evolved the ability to control symbiotic specificity. © 2016 American Society of Plant Biologists. All Rights Reserved.

  11. Chemical characterization of bottom sediments from Ribeira de Iguape river, Parana and Sao Paulo states, Brazil, by instrumental neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Francisco J.V.; Quinaglia, Gilson A., E-mail: fjcastro@sp.gov.br, E-mail: gquinaglia@sp.gov.br [Companhia Ambiental do Estado de Sao Paulo(ELTA/CETESB), Sao Paulo, SP (Brazil). Setor de Analises Toxicologicas; Favaro, Deborah I.T., E-mail: defavaro@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (LAN-CRPq/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Lab. por Ativacao Neutronica

    2013-07-01

    During several decades the Alto Vale of Ribeira region (SP-PR) suffered under lead mining activities in the region. Although in 1996 all such activities ceased, the mining activities left behind a huge amount of environmental liabilities mainly in the hydrographic basin of Ribeira de Iguape river. In the present study the chemical characterization of bottom sediments was undertaken and the concentration of the major (Ca, Fe, K and Na), trace (As, Ba, Br, Co, Cs, Hf, Rb, Sb, Ta, Th, U, Zn) and rare earth elements (La, Ce, Eu, Nd, Sm, Lu, Tb, Yb and Sc) by instrumental neutron activation analysis (INAA) were determined. The validation of the analytical methodology was performed by means of certified reference materials analyses and Z-score criterion was used. Eight points were sampled at the Ribeira de Iguape river and its majorities from Adrianopolis (Pr) (site 01) to Registro (SP) (site 08). Granulometric analyses and textural classification were undertaken in the sediment samples. The results obtained by using INAA were compared to UCC (Upper Continental Crust) reference values. The environmental tools of Enrichment Factor (EF) and Geochemical Index (GI) were used to assess the degree of metal contamination in the sediment samples. Samples from site 5 (Betari river - Iporanga, SP) presented high values for As, Sb and Zn and greater IGeo (3.1 - 5.5) and EF (>7.0) values for these elements classifying this point as highly polluted for these elements as well as a strong anthropogenic contribution. Site 7 (Ribeira river - Eldorado, SP) was considered moderately polluted for As, Br and Sb. The high concentration levels of some metals and metalloids reflect the contribution of mining activities from the past in the region. From the results it can be seen that although mining activities no longer exist since 1996, the deleterious effects in the environment are still present and strong. (author)

  12. Inventário estruturado de formigas (Hymenoptera, Formicidae em floresta ombrófila de encosta na ilha da Marambaia, RJ Structured inventory of ants (Hymenoptera, Formicidae in atlantic slope rain-forest of Marambaia Island, RJ

    Directory of Open Access Journals (Sweden)

    Michel de S. Schütte

    2007-03-01

    Full Text Available As formigas são componentes funcionais importantes em florestas tropicais devido aos papéis ecológicos que exercem, à grande biomassa e à riqueza de espécies. Embora a Mata Atlântica seja um dos ecossistemas mais bem estudados no Brasil, ainda faltam informações sobre a diversidade de formigas nos fragmentos florestais do Estado do Rio de Janeiro. A riqueza e composição da assembléia de formigas em floresta ombrófila de encosta na ilha da Marambaia (RJ foi estudada através de um inventário estruturado em uma área de 0,6 ha. Armadilhas do tipo "pitfall" e coletas manuais foram empregadas na serapilheira e sobre a vegetação entre os meses de janeiro e julho de 2004. Um total de 29 gêneros e 82 espécies foi encontrado na amostragem. A abundância e a riqueza de espécies foram maiores nas amostras de março do que de julho. Já a eqüitatividade e diversidade de formigas nas amostras não foram influenciadas pela época da coleta. As amostras de formigas em galhos mortos adicionaram seis espécies à lista, acrescentando informações sobre a biologia das espécies. As amostras sobre plantas totalizaram 32 espécies de formigas, das quais 12 foram exclusivas, como as espécies de Pseudomyrmex e algumas de Crematogaster e Pachycondyla. Este estudo pretende contribuir para o desenvolvimento de prioridades conservacionistas em um dos ecossistemas mais ameaçados do mundo.Ants are an important functional component in tropical forest due to their ecological roles, biomass and species diversity. Although the Atlantic Forest is one of the best studied ecosystems in Brazil, there is a lack of information about ant diversity in forest fragments of the state of Rio de Janeiro. The composition and richness of the ant fauna from atlantic slope rain-forest in Marambaia island-RJ were assessed by the structured inventory in an area of 0.6 ha. Pitfalls traps and hand collecting were used for sampling ants in the litter and on vegetation from

  13. Siltation rate and main anthropic impacts on sedimentation of the São Luís tidal inlet - State of Maranhão, Brazil

    Directory of Open Access Journals (Sweden)

    James Werllen de Jesus Azevedo

    2016-03-01

    Full Text Available Abstract In recent decades, intense human intervention in the coastal zone has given rise to severe siltation and erosion problems. This scenario is located the São Luís tidal inlet, formed by the mouths of the Anil and Bacanga rivers which due to various kinds of interference have been changing their sediment transport and deposition processes. With these changes in mind, this study sought to evaluate the evolution of the siltation and sedimentation rates in this area, as well as the main anthropogenic influences associated with this process. The methodology consisted in verifying the morphological evolution on the basis of the scanning and vectorization of nautical charts of 1947 and 1966, bathymetric surveys conducted in 2006, and aerial photos dating from 2011. The results show a silting up process coincident with interventions that occurred in the Anil and Bacanga river basins, with a volume of silt estimated at 8.5x106 m3, over the period from 1944 to 2011 (64 years, at a rate of 1.6 cm.yr-1. These processes are associated mainly with the construction of the Bacanga dam and land reclamation projects undertaken for the purpose of providing new areas for urban expansion. The evaluation of the results showed intense and advanced silting up of the São Luís tidal inlet, at rates proportionally greater than those of other estuaries, calling for corrective actions and the implementation of coastal management policies for this area.

  14. Metal and trace element sediment assessment from Guarapiranga reservoir, Alto Tiete Basin, Sao Paulo, SP, Brazil; Avaliacao da concentracao de metais e elementos traco em amostras de sedimento do reservatorio Guarapiranga, Sao Paulo, SP, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, Guilherme Moura

    2011-07-01

    The Guarapiranga Reservoir, located in Sao Paulo metropolitan region, Brazil, is responsible for supplying about 20% of the entire population's water needs of this region or approximately 3.7 million people. However, this system has shown significant degradation in water quality, due to untreated domestic sewage and industrial effluents. In this study sediment samples were collected at five points along the reservoir and total concentration of some major (Fe, K and Na), trace (As, Ba, Br, Co, Cr, Cs, Hf, Hg, Rb, Sb, Sc, Ta, Tb, Th, U, V and Zn) and rare earth (Ce, Eu, La, Lu, Nd, Sm, Tb and Yb) elements were determined by instrumental neutron activation analysis (INAA). By inductively coupled plasma optical emission spectrometry (ICP OES) the concentrations of Al, Ba, Be, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb, Ti, V e Zn were determined after digestion procedure following US EPA 3051 methodology. The concentrations of metals Cd and Pb were determined by graphite furnace atomic absorption spectrometry (GFAAS) and total Hg by cold vapor atomic absorption spectrometry (CVAAS). Methodology validation according to precision and accuracy was performed by reference materials analyses for the three different analytical techniques used. Multielemental results obtained by INAA were compared to NASC (North American Shale Composite), Upper Continental Crust (UCC) and soil from Guarapiranga park values. The Enrichment Factor (EF) and Geo accumulation Index (Igeo) were also evaluated for these data. Metal concentration results by ICP OES and AAS in the samples were compared to the TEL and PEL oriented values established by the Canadian Council of Ministers of the Environment and also adopted by CETESB (Environmental Protection Agency of the Sao Paulo State). The results were also compared to regional reference values (VRR) of limnic sediments from the Alto Tiete Basin. From these data an assessment of metal and trace element accumulated in the sediments from the

  15. A new genus of Ectinosomatidae (Copepoda, Harpacticoida from sublittoral sediments in Ubatuba, São Paulo State, Brazil, including an updated key to genera and notes on Noodtiella Wells, 1965

    Directory of Open Access Journals (Sweden)

    Terue Kihara

    2009-08-01

    Full Text Available Both sexes of a new genus and species of Ectinosomatidae (Copepoda, Harpacticoida from sublittoral sediments collected on the inner continental shelf in Ubatuba, São Paulo State (Brazil are described in detail. Chaulionyx gen. n. (type species: C. paivacarvalhoi sp. n. differs from all known genera in the presence of a conspicuous bifid spine on the prehensile P1 endopod. It can be differentiated from other genera with a prehensile endopod (Halophytophilus Brian, 1919; Bradyellopsis Brian, 1925; Klieosoma Hicks & Schriever, 1985 by the presence of distinctive subrectangular middorsal pores on the urosomites and the unarmed male sixth legs. The genus Lineosoma Wells, 1965 is recognized as a paraphyletic taxon and relegated to a junior subjective synonym of Noodtiella Wells, 1965. Arenosetella pectinata Chappuis, 1954a is removed from its floating position in Ectinosomoides Nicholls, 1945, transferred to the genus Noodtiella as N. pectinata comb. n. and considered the senior subjective synonym of N. toukae Mitwally & Montagna, 2001. Dichotomous keys are provided for the identification of the 18 valid species of Noodtiella and the 21 valid genera of the family Ectinosomatidae. Halophytophilus aberrans Wells & Rao, 1987 is placed species incertae sedis in the family.

  16. Análise faunística dos helmintos de pardais (Passer domesticus L., 1758 capturados em Campo Grande, Rio de Janeiro, RJ Faunistic analysis of the helmints of sparrows (Passer domesticus L., 1758 captured in Campo Grande, Rio de Janeiro, RJ

    Directory of Open Access Journals (Sweden)

    Marília de Carvalho Brasil

    1992-01-01

    Full Text Available Sparrows captured in Campo Grande, Rio de Janeiro, RJ, were examined through necropsy and the helmints found were identified. The prevalence, intensity of infection and the habitat of each helminth species found are showed. An analysis of the helminth fauna using the importance value of the species collected indicated that in the sparrow the dominant species are: Leucochloridium parcum, Tanaisia inopina, Choanotaenia passerina, Dispharynx nasuta and Tetrameres minima; and the co-dominant species are: Echinostoma revolutum, Eumegacetes mediximus and Mediorhynchus papillosus. According to the host specificity were classified as specialist species: L. parcum, T. inopina, C. passerina and T. minima; and as generalist species: E. revolutum, E. medioximus, D. nasuta and M. papillosus. Echinostoma revolutum was found for the first time in P. domesticus. The species E. medioximus , T. minima and D. nasuta were found for the first time in the sparrow in Brazil. The species C. passerina and M. papillosus were found for the first time in Brazil, expanding their distribution to the Neotropical region.

  17. Fluid escape structures as possible indicators of past gas hydrate dissociation during the deposition of the Barremian sediments in the Recôncavo Basin, NE, Brazil

    Directory of Open Access Journals (Sweden)

    Antonio Fernando Menezes Freire

    Full Text Available ABSTRACT: Empty elliptical vesicles are observed in outcrops of Barremian very fine clayey sandstone to siltstone lacustrine slurry deposits of the Pitanga Member (Maracangalha Formation, exposed in the Maré Island, Southern Recôncavo Basin, Brazil. These sedimentary features have been traditionally interpreted as water escape structures triggered by the diapirism of the underlying shales of the Candeias Formation. This work proposes that vesicles were generated during massive gas hydrate dissociation as a result of tectonic activity in a paleolake system. Tectonic uplift would have triggered both the reduction of the confining pressure as well as an increase in lake bottom temperature, resulting in the instability of gas hydrate and causing intense release of both methane - or carbon dioxide (CO2 - and water. On one hand, this proposal has a strong impact on paleoenvironmental interpretations, giving support to the current hypothesis that rocks related to the Pitanga Member would have been deposited under water columns deep enough for gas hydrate formation and subsequent dissociation. On the other hand, it provides new insights on the genesis of fluid escape structures in sedimentary rocks, both lacustrine and marine, providing a paleobathymetric indicator.

  18. Coastal sedimentation

    Science.gov (United States)

    Schubel, J. R.

    1980-01-01

    Several important coastal sedimentation problems are identified. Application of existing or anticipated remote sensing techniques to examine these problems is considered. Specifically, coastal fine particle sediment systems, floods and hy hurricanes and sedimentation f of coastal systems, routes and rates of sediment transport on continental shelves, and dredging and dredged material disposal are discussed.

  19. Encontro de anofelinos do subgênero Nyssorhynchus em recipientes artificiais, Maricá, RJ, Brasil

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    Carreira-Alves João R

    2001-01-01

    Full Text Available Registram-se o encontro de larvas e uma pupa de anofelinos em recipientes artificiais desativados. Foram encontradas larvas de Anopheles argyritarsis em uma caixa d'água abandonada, na localidade de Pedregulho, distrito de Ponta Negra, e uma pupa de Anopheles aquasalis em um recipiente experimental, a céu aberto, no distrito de Itaipuaçu, onde ocorreram três casos de malária em 1997. Ambos os encontros ocorreram no município de Maricá, RJ, Brasil.

  20. Insect galls of Restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ

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    V. C. Maia

    Full Text Available Abstract Thirty-one morphotypes of insect galls and two flower damages were found on 16 families, 22 genera and 24 plant species in Restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ. Fabaceae and Myrtaceae were the plant families with the greatest richness of insect galls (4 and 6 morphotypes, respectively, and the greatest number of galled plants (four and three species, respectively. Galls were mostly found on leaves and stems (77% and 10%, respectively. The galling insects are represented by Diptera, Lepidoptera, and Hemiptera. The majority of the galls (81% were induced by gall midges (Cecidomyiidae: Diptera.

  1. Diversidade de moscas-das-frutas em pomares de citros no município de Araruama, RJ Diversity of fruit flies in citrus groves in the municipality of Araruama, RJ

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    Jorge Ferreira de Souza

    2008-04-01

    Full Text Available O objetivo deste estudo foi determinar as espécies de Tephritidae e Lonchaeidae (Diptera: Tephritoidea de ocorrência em pomares de laranja doce (Citrus sinensis Osbeck e tangerina (Citrus reticulata Blanco, no município de Araruama, RJ, durante o período de dezembro de 2002 a novembro de 2003. Os espécimes foram coletados em armadilhas McPhail contendo solução aquosa de proteína hidrolisada a 5% e em amostras de frutos de seis variedades de citros. Nas armadilhas, o total de 2.543 adultos de Tephritoidea (1.430 fêmeas e 1.023 machos foi capturado, sendo dez espécies de Tephritidae, quatro espécies e dois morfotipos de Lonchaeidae. Dos Tephritidae e capturados nas McPhail, quatro espécies (Anastrepha fraterculus, A. obliqua, A. sororcula e Ceratitis capitata infestaram frutos cítricos, enquanto que, dos Lonchaeidae, somente os morfotipos não infestaram as amostras de citros. Os resultados demonstram que a densidade populacional das moscas-das-frutas pode ser superestimada, quando baseada no número de moscas por armadilha, devido à captura de espécies que não infestam os frutos de interesse comercial.This study was aimed at determining the species of Tephritidae and Lonchaeidae (Diptera: Tephritoidea that occur on groves of sweet orange (Citrus sinensis Osbeck and tangerine (Citrus reticulata Blanco in the municipality of Araruama, state of Rio de Janeiro, Brazil, from December, 2002 to November, 2003. The specimens were collected by McPhail traps with aqueous solution of hydrolyzed protein to 5% and in fruits samples of six varieties of citrus. In the traps the total of 2,543 adults of Tephritoidea (1,430 females and 1,023 males was captured, being ten species of Tephritidae, four species and two morphotypes of Lonchaeidae. From the Tephritidae caught by the McPhail, four species (Anastrepha fraterculus, A. obliqua, A. sororcula and Ceratitis capitata infested citric fruits while the Lonchaeidae, the morphotypes did not infest

  2. Determinação do coeficiente cultural (Kc do feijoeiro (Phaseolus vulgaris L., em Campos dos Goytacazes, RJ Determination of the crop coefficient (Kc for common bean (Phaseolus vulgaris L. in Campos dos Goytacazes, RJ

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    José C. Mendonça

    2007-10-01

    Full Text Available A evapotranspiração de uma cultura é uma das principais informações exigidas para o manejo de irrigação e para fins de planejamento do uso da água. Dentre as abordagens disponíveis para a estimativa do consumo de água pelas plantas, destaca-se o uso de coeficientes de cultura (Kc associados a estimativas da evapotranspiração de referência (ETo. Buscou-se determinar, aqui, os valores de Kc para as diferentes fases fenológicas do feijoeiro comum (Phaseolus vulgaris L., cultivar em lançamento UENF-47, através da utilização de um lisímetro de pesagem e compará-los com os valores propostos pela FAO 56. Concluiu-se que as equações de ajustamento propostas por Allen et al. (1998 se mostraram eficientes para a correção e ajustamento dos coeficientes culturais obtidos neste experimento e que os coeficientes culturais das fases 3 (Kc méd e 4 (Kc fim sugeridos também por Allen et al. (1998 se ajustaram bem ��s condições de cultivo do feijoeiro cultivado no período de outono/inverno, em Campos dos Goytacazes, RJ.The evapotranspiration of a crop is one of the main information required for proper irrigation management and to develop an efficient water usage plan. Among the methods to estimate the amount of water that is consumed by plants, the use of crop coefficients (Kc, associated with estimates of the reference evapotranspiration (ETo, stands as one of the most promising. This work aimed to deterime the values of Kc for different phenological phases of common bean plants (Phaseolus vulgaris L. of the cultivar UENF-47. Determination of Kc values was performed using a weighing lisimeter and results were compared with values obtained through the FAO 56 standard. Results showed that the adjustment equations proposed by Allen et al. (1998 were adequate for fitting the values of Kc obtained in this experiment. It has been shown that the crop coefficients for phenological phases 3 and 4 proposed by Allen et al. (1998 are adequate

  3. Characterization of the superficial sediment of Jordão River in Center-South Region of the Parana state, Brazil

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    Adelmo Lowe Pletsch

    2010-04-01

    Full Text Available The present paper aimed to quantify the metals ions (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb e Zn of sediments from the two centimeter surface layer of Jordão river in Guarapuava City, PR. Other parameters, such as pH, total phosphate (PT, total organic carbon (COT, total Nitrogen (NT and granulometry were also evaluated. The results were suggestive that local anthropization, mainly originated from agricultural and domestic activities, occurred in that locality. A spatial variation among samples was detected. With concentrations expressed in mg Kg-1 we found: from 8,300 to 19,000 for Al; Cd: < LD; Cr, from 6.1 to 45.2; Cu, from 31.8 to 64.7; Fe, from 17,200 to 69,100; Mn, from 264 to 467; Ni, from 2.3 to 7.3; Pb, from 6.5 to 12.5; Zn, from 46.1 to 139.0. The level of contamination was also assessed by applying a contamination factor. Cu and Zn reached values above the considered moderate contamination. This concentration level may interfere with the equilibrium of the studied ecosystem.

  4. AVALIAÇÃO DA ROTULAGEM DE LEITES UAT COMERCIALIZADOS POR ESTABELECIMENTOS VAREJISTAS NO MUNICÍPIO DO RIO DE JANEIRO – RJ

    Directory of Open Access Journals (Sweden)

    Vivian Scoralick de Almeida Torquato

    2016-07-01

    Full Text Available Labels are consumer’s information and when they are well presented allow choices to be made more thoroughly. The access to information must meet the requirements of laws and encourages investments by industries to improve the nutritional profile of products. The accuracy of the information presented by the food label should be guaranteed in order that the label supports consumers in their choices and health professionals in guidance for diet composition. Thus, a label that meets the requirements of the laws, which bring information legible, clear and reliable is essential in foods. The present study aimed to evaluate the compliance of the labeling of 46 different samples of UHT milk sold in the city of Rio de Janeiro – RJ, Brazil compared to current legislation. Products labels were evaluated in their entirety both the main display and the secondary display in accordance with Brazilian law requirements and constant legal specifications. None of the samples showed the label completely in accordance with the laws in force, demonstrating the necessity of the existence of a more intense supervision to ensure that the information on the labels are easily visible, reliable and enlightening.

  5. 75 FR 18254 - R.J. Corman Railroad Company/Bardstown Line-Lease and Operation Exemption-R.J. Corman Railroad...

    Science.gov (United States)

    2010-04-09

    ....J. Corman Railroad Property, LLC R.J. Corman Railroad Company/Bardstown Line (RJC Railroad Company... from R.J. Corman Railroad Property, LLC (RJC Railroad Property), and to operate approximately 42 route miles of RJC Railroad Property's rail line extending from milepost 0.144 at or near Oneida to milepost...

  6. Estimativa do potencial de sedimentação e erosão: caso Manguezal do Pina, Recife (PE Estimating the potential for sedimentation and erosion: the case of Manguezal do Pina, Recife (PE, Brazil

    Directory of Open Access Journals (Sweden)

    Alex Maurício Araújo

    2011-06-01

    Full Text Available O processo de desenvolvimento da sociedade moderna tem resultado em um aumento das pressões antrópicas nas áreas de manguezais. Este artigo concentra-se nos aspectos dos padrões dos fluxos d'água e na identificação de seus efeitos mecânicos nos sedimentos em áreas de manguezais. A metodologia experimental desenvolvida consiste no planejamento e execução de um programa de levantamentos hidrodinâmicos, levando-se em conta a variabilidade espaço-temporal inerente a esses ambientes. Os resultados obtidos possibilitam o traçado de cenários quantitativos e qualitativos das principais tendências dos fluxos hidrossedimentológicos, processos físicos fundamentais a serem considerados em qualquer plano de manejo dos recursos naturais dos manguezais. Esse método foi aplicado como estudo de caso ao manguezal do Pina, Recife, PE.The development process of modern society has resulted in an increase of anthropogenic pressures on mangrove areas. This article focuses on aspects of water flow patterns and the identification of their mechanical effects in sediments in mangroves areas. The experimental methodology developed consists in planning and implementing a program of hydrodynamic surveys considering spatial and temporal variability that is inherent in these environments. The results provide a qualitative and quantitative map of the main tendencies of hydrosedimentological flows, which is notably important in any plan for natural resource management of mangroves. This method was applied as a case study of the Pina mangrove in Recife, PE, Brazil.

  7. Pollen analysis of Holocene sediments from the Poço das Antas National Biological Reserve, Silva Jardim, Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Luciane G. Coelho

    2008-09-01

    Full Text Available The Poço das Antas National Biological Reserve is located in Rio de Janeiro State, southeast Brazil. This paper presents information on past environmental characteristics of the area through pollen analysis. Two sedimentary columns were collected and five samples were selected for radiocarbon dating. The following ages of the columns from bottom to top were detected: column 1 - 1.20-1.16 m: 6080 ±40 years BP, 0.775-0.735 m: 4090 ±40 years BP, 0.385-0.345 m: 1880 ±80 years BP; column 2 - 1.22-1.18 m: 3520 ±40 years BP, 0.23-0.19 m: 1810 ±40 years BP. Three samples from column 1 and two samples from column 2 were selected for pollen analysis: 1.20 m, 0.77 m and 0.37 m of column1 and 1.22 m and 0.21 m of column 2. Chemical treatment followed standard methodology. The palynological analysis shows that around 6080 years BP the study area was dominated by a rain forest and from around 4090 years BP the vegetation changed to a fragmented forest, restricted to low hills and surrounded by an open area of grassland and pioneer plants, swamps and peat areas. The pollen assemblage of the samples 3520, 1880 and 1810 years BP suggest the permanence of this kind of vegetation between 4000 years BP and the actual.A Reserva Biológica de Poço das Antas localiza-se no Estado do Rio de Janeiro, na região sudeste do Brasil. O presente estudo teve por objetivo fornecer informações a respeito de características ambientais pretéritas da área por meio de análises palinológicas. Foram coletadas duas colunas de sedimentos e cinco amostras foram selecionadas para datação pelo método de radiocarbono, revelando as seguintes idades, da base ao topo dos testemunhos: coluna 1 - 1,20-1,16 m: 6080 ± 40 anos AP, 0,775-0,735 m: 4090 ± 40 anos AP e 0,38-0,34 m: 1880 ± 80 anos AP; coluna 2 - 1,22-1,18 m: 3520 ± 40 anos AP e 0,23-0,19 m, 1810 ± 40 anos AP. Foram retiradas três amostras da coluna 1 e duas da coluna 2 para análise palinológica: 1,20 m, 0,77 e

  8. 75 FR 18253 - R.J. Corman Railroad Property, LLC-Acquisition Exemption-NC Railroad, Inc.

    Science.gov (United States)

    2010-04-09

    .... R.J. Corman Railroad Property, LLC (RJC Railroad Property), a Class III rail carrier, has filed a... Company/Bardstown Line (RJC Railroad Company) seeks to lease from RJC Railroad Property and to operate the line that RJC Railroad Property is purchasing from NCRL. Based on projected revenues for the line, RJC...

  9. Assessment of water quality in areas of ecological economic zoning of the Guapiaçu-Macacu basin, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Darcilio Fernandes Baptista

    2012-04-01

    Full Text Available Aquatic ecosystems have often been significantly altered by multiple impacts. The Guapiaçu-Macacu Hydrographic Complex is an important basin in Rio de Janeiro characterized by distinct ecological zones that make up an Ecological Economic Zoning. This research evaluated ecological upright in segments of this Complex located in Wildlife Conservation Zone (WCZ and the Agricultural Use Zone (AUZ using the Protocol Visual Assessment (PVA and physical, chemicals and microbiology methods. The results showed a significant difference between the points of lowest contamination degree in WCZ and stretches with a greater impact degree in AUZ. The PVA was more sensible than the conventional parameters in the resolution between segments impacted environmentally and impacted middle located in AUZ. This type of evaluation proved to be more effective in environmental monitoring the water quality for watersheds that have their Ecological Economic Zoning Plan. Therefore, the use of physical, chemical and microbiological methods must be complemented by the PVA.

  10. Population structure of the deep sea hermit-crab Catapaguroides microps (Paguroidea, Anomura in the Campos Basin, RJ, Brazil

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    Luana S. F. Lins

    2010-01-01

    Full Text Available The population of Catapaguroides microps A. Milne-Edwards and Bouvier, 1892 in the Campos Basin was studied with an emphasis on its composition in the Northern and Southern parts of the Basin, the different gender sizes, sex ratio, and size class distribution. Specimens were collected under the "Program for the Environmental Characterization of the deep waters of the Campos Basin" ("Programa de Caracterização Ambiental das Águas Profundas da Bacia de Campos" in February and August 2003. A total of 339 hermit crabs were analyzed. Individual abundance was higher in the North. C. microps shows sexual dimorphism for body size, the males being larger than the females. The sex ratio is skewed in the female's favor (1:0.7, as shown by previous studies on shallow-water populations.A população de Catapaguroides microps A. Milne-Edwards and Bouvier, 1892 da foi analisada com foco na abundância de indivíduos, diferença de tamanho entre machos e fêmeas, razão sexual e distribuição dos indivíduos nas classes de tamanho, ao norte e ao sul da Bacia de Campos. As amostras foram coletadas pelo Programa de Caracterização Ambiental da Bacia de Campos em fevereiro e agosto de 2003. O total de indivíduos analizados foi de 339. A abundância foi maior no norte da Bacia de Campos. Catapaguroides microps mostrou dimorfismo sexual no tamanho do corpo, sendo os machos maiores que as fêmeas. A razão sexual favorece as fêmeas (1:0,7, de forma similar a outros estudos efetuados com populações de águas rasas.

  11. Habitat use by Oryzomys subflavus (Rodentia in an open shrubland formation in Restinga de Jurubatiba National Park, RJ, Brazil

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    H. G. Bergallo

    Full Text Available The Restinga de Jurubatiba has at least 10 plant formations, including open Clusia shrubland. This formation is composed of dense shrubs of many shapes and sizes, where Clusia hilariana is one of the most important plant species. Shrublands with Clusia (CC are poorer in plant species and less dense than shrublands without Clusia (SC. Oryzomys subflavus (Rodentia is the most abundant small mammal species in the open Clusia shrubland. We tested the hypothesis that the abundance of rodents would increase with the size of the patch and would be higher in SC shrublands. Rodents were captured, marked and released in three 780-m-long transects. At each capture site, we evaluated the shape of the shrubland patch, calculated the area and noted the category of the shrubland. Using ANCOVA, we ascertained whether the abundance of Oryzomys subflavus increased with the sampled area and used CC and SC shrublands differently. We also verified if the size of patches used by rodents varies in the same frequency as the size of available shrublands. Rodent abundance was found to increase significantly with the area. There were no differences in the size of the patches used by rodents and the frequency of the size of available patches. This finding indicates that O. subflavus, in the study area, is a generalist species that uses its habitat according to availability.

  12. Management of construction waste: a case study in the municipality of Macaé, RJ

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    Caroline Ramos Medeiros

    2016-12-01

    Full Text Available The building industry has occupied a prominent place in the Brazilian economy. However it may represent serious environmental impacts in the generation and improper disposal of waste from construction and demolition (C&D. The research aimed at evaluating the initiatives of public management of C&D in the county of Macaé, RJ. It was based on the empirical-phenomenological methods, with individual descriptions and causal connections obtained from stakeholders, literature and documentary reviews, as well as qualified interviews (key informants with local managers and specialists. Preliminary results have  allowed for an assessment of the current situation of management, legal instruments, environmental licensing, and irregular disposal of C&D.

  13. CONSUMPTION OF ARTIFICIAL COLOURS FOR PRESCHOOL CHILDREN OF A BAIXADA FLUMINENSE, RJ

    OpenAIRE

    Polônio, Maria Lúcia Teixeira; Universidade Federal do Estado do Rio de Janeiro; Peres, Frederico; Escola Nacional de Saúde Pública/ CESTH/Fiocruz

    2012-01-01

    RESUMO: OBJETIVOS: Analisar o consumo de alimentos industrializados com corantes por pré-escolares de um município da Baixada Fluminense. MÉTODOS: A amostra foi constituída por 148 mães de pré-escolares de 3 a 5 anos matriculados na rede pública do município de Mesquita, RJ. Foi aplicado um questionário estruturado constituído por variáveis sócio-demográficas e de saúde. Para análise do consumo de alimentos utilizaram-se o Recordatório 24 horas e Questionário de Frequência Alimentar (QFA)....

  14. O papel dos sulfetos volatilizados por acidificação no controle do potencial de biodisponibilidade de metais em sedimentos contaminados de um estuário tropical, no sudeste do Brasil The role of acid volatile sulfide in the control of potential metal bioavailability in contaminated sediments from a tropical estuary, southeast Brazil

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    Érico Casare Nizoli

    2009-01-01

    Full Text Available Measurements of acid volatile sulfide (AVS and simultaneously extracted metals (SEM were combined in order to verify the ecological hazard of contaminated sediments from the Santos-Cubatão Estuarine System (SE Brazil, which is located in one of the most industrialized areas in the Latin America. Intertidal sediments from the Morrão River estuary were collected seasonally in short cores. The redox conditions, organic matter contents and grain-size were the main controlling factors on SEM distribution. However, clear relationships among these variables and AVS were not observed. The molar SEM/AVS ratios were frequently > 1 especially in the summer, suggesting major metal bioavailability hazard in this humid hot season.

  15. Taxa de absorção atmosférica sobre as cidades de Botucatu-SP e Rio de Janeiro-RJ Atmospheric absorption ratio on the cities of Botucatu-SP and Rio de Janeiro-RJ

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    Nelson Veissid

    2010-12-01

    October 23, 1998 and it hosts on board a solar cell experiment. Silicon solar cell is a semiconductor device that senses visible and near infrared (400-1100 nm radiations. The experiment permits the simultaneous inference of direct insolation and the insolation that is reflected outside of Earth. The data of the solar cell experiment are transmitted in real time by the satellite telemetry and are received by the ground station of Cuiabá, MT-Brazil (16°S, 56°W. This fact limits their spatial coverage to a circle on the South America. The planetary albedo is obtained inside this coverage area and the data can be grouped into periods of time (annual, seasonal or monthly or studied for several places (latitude and longitude during the life of the satellite. Atmospheric transmission coefficient or clearness index (Kt, measured at meteorological stations around the Earth surface, together with simultaneous measured of the planetary albedo permits to calculate the atmospheric absorption coefficient (Ka. The developed method in this work for evaluating the Ka considers that the planetary albedo is composed by two parts: the local and the non local reflectivity. Considering this new concept, an atmospheric absorption ratio (called here Ra is defined as the quotient between Ka and the net solar irradiance power that is not transmitted through the atmosphere (100%-Kt. The atmospheric absorption ratio defined by this way is not cloud cover dependent. The frequency histogram of Ra indicates the values of 0.86±0.07 and 0.88±0.09 on the cities of Botucatu-SP and Rio de Janeiro-RJ respectively, during the years of 1999 to 2006.

  16. Organic micropollutants on river sediments from Rio de Janeiro State, Southeast Brazil Micro-poluentes orgânicos em sedimentos fluviais no Estado do Rio de Janeiro, Sudeste do Brasil

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    João Paulo Machado Torres

    2002-04-01

    Full Text Available The paper is a contribution for the knowledge upon concentrations and fate of different kinds of organic micropollutants in Tropical River system from a very industrialized region in Brazil. The presented data was obtained during three years of an International Research Project between Brazilian and Dutch institutions. The sediments were sampled at the Paraiba do Sul-Guandu river watershed, the most important watercourse of Rio de Janeiro state, where up 90 % of the population depends on its water for domestic uses. After extraction with non-polar solvents in a hot sohxlet device and clean up using chromatographic columns, three classes of organic micropollutants were analyzed: organochlorine insecticides (OCs, polychlorinated biphenyls (PCBs and polynuclear aromatic hydrocarbons (PAHs. The organochlorines, including the PCBs were scarcely present in the collected samples probably reflecting the restrictions of use of this class of compounds in the Brazilian market. However, the PAHs levels were high at the vicinity of a huge steelworks located in the city of Volta Redonda. This contamination is probably due to the massive use of coal in the above-cited metallurgical plant.Este artigo pretende contribuir para o conhecimento sobre a concentração e destino de diferentes tipos de micro-poluentes num sistema fluvial tropical de uma região brasileira altamente industrializada. Os dados apresentados foram obtidos ao longo de três anos, como parte de um projeto de pesquisa internacional envolvendo instituições brasileiras e holandesas. As amostras de sedimentos foram obtidas da bacia hidrográfica Paraíba do Sul/Guandu, a mais importante hidrovia no Estado do Rio de Janeiro, onde 90% da população depende dessa água para uso doméstico. Após extração com solventes não-polares num dispositivo sohxlet quente, e limpeza utilizando colunas cromatográficas, foram analisadas três classes de micro-poluentes orgânicos: inseticidas

  17. Sediment Transport

    DEFF Research Database (Denmark)

    Liu, Zhou

    Flow and sediment transport are important in relation to several engineering topics, e.g. erosion around structures, backfilling of dredged channels and nearshore morphological change. The purpose of the present book is to describe both the basic hydrodynamics and the basic sediment transport...... mechanics. Chapter 1 deals with fundamentals in fluid mechanics with emphasis on bed shear stress by currents, while chapter 3 discusses wave boundary layer theory. They are both written with a view to sediment transport. Sediment transport in rivers, cross-shore and longshore are dealt with in chapters 2...

  18. Manaus, Brazil

    Science.gov (United States)

    2002-01-01

    The junctions of the Amazon and the Rio Negro Rivers at Manaus, Brazil. The Rio Negro flows 2300 km from Columbia, and is the dark current forming the north side of the river. It gets its color from the high tannin content in the water. The Amazon is sediment laden, appearing brown in this simulated natural color image. Manaus is the capital of Amazonas state, and has a population in excess of one million. The ASTER image covers an area of 60 x 45 km. This image was acquired on July 16, 2000 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite. With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER will image Earth for the next 6 years to map and monitor the changing surface of our planet.ASTER is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. Dr. Anne Kahle at NASA's Jet Propulsion Laboratory, Pasadena, California, is the U.S. Science team leader; Bjorn Eng of JPL is the project manager. The Terra mission is part of NASA's Earth Science Enterprise, a long-term research and technology program designed to examine Earth's land, oceans, atmosphere, ice and life as a total integrated system.The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping, and monitoring dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface

  19. Severity of tegumentary leishmaniasis is not exclusively associated with Leishmania RNA virus 1 infection in Brazil

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    Luiza de Oliveira Ramos Pereira

    2013-08-01

    Full Text Available Leishmania RNA virus (LRV has been shown to be a symbiotic component of Leishmania parasites in South America. Nested retro-transcription polymerase chain reaction was employed to investigate LRV1 presence in leishmaniasis lesions from Brazil. In endemic areas of Rio de Janeiro (RJ, no LRV1 infection was observed even with mucosal involvement. LRV1 was only detected in Leishmania (V. guyanensis cutaneous lesions from the northern region, which were obtained from patients presenting with disease reactivation after clinical cure of their primary lesions. Our results indicated that the severity of leishmaniasis in some areas of RJ, where Leishmania (V. brazi-liensis is the primary etiological agent, was not associated with Leishmania LRV1 infection.

  20. A reassessment of the suspended sediment load in the Madeira River basin from the Andes of Peru and Bolivia to the Amazon River in Brazil, based on 10 years of data from the HYBAM monitoring programme

    Science.gov (United States)

    Vauchel, Philippe; Santini, William; Guyot, Jean Loup; Moquet, Jean Sébastien; Martinez, Jean Michel; Espinoza, Jhan Carlo; Baby, Patrice; Fuertes, Oscar; Noriega, Luis; Puita, Oscar; Sondag, Francis; Fraizy, Pascal; Armijos, Elisa; Cochonneau, Gérard; Timouk, Franck; de Oliveira, Eurides; Filizola, Naziano; Molina, Jorge; Ronchail, Josyane

    2017-10-01

    The Madeira River is the second largest tributary of the Amazon River. It contributes approximately 13% of the Amazon River flow and it may contribute up to 50% of its sediment discharge to the Atlantic Ocean. Until now, the suspended sediment load of the Madeira River was not well known and was estimated in a broad range from 240 to 715 Mt yr-1. Since 2002, the HYBAM international network developed a new monitoring programme specially designed to provide more reliable data than in previous intents. It is based on the continuous monitoring of a set of 11 gauging stations in the Madeira River watershed from the Andes piedmont to the confluence with the Amazon River, and discrete sampling of the suspended sediment concentration every 7 or 10 days. This paper presents the results of the suspended sediment data obtained in the Madeira drainage basin during 2002-2011. The Madeira River suspended sediment load is estimated at 430 Mt yr-1 near its confluence with the Amazon River. The average production of the Madeira River Andean catchment is estimated at 640 Mt yr-1 (±30%), the corresponding sediment yield for the Andes is estimated at 3000 t km-2 yr-1 (±30%), and the average denudation rate is estimated at 1.20 mm yr-1 (±30%). Contrary to previous results that had mentioned high sedimentation rates in the Beni River floodplain, we detected no measurable sedimentation process in this part of the basin. On the Mamoré River basin, we observed heavy sediment deposition of approximately 210 Mt yr-1 that seem to confirm previous studies. But while these studies mentioned heavy sedimentation in the floodplain, we showed that sediment deposition occurred mainly in the Andean piedmont and immediate foreland in rivers (Parapeti, Grande, Pirai, Yapacani, Chimoré, Chaparé, Secure, Maniqui) with discharges that are not sufficiently large to transport their sediment load downstream in the lowlands.

  1. A Cross-Sectional Study of Viral Hepatitis Perception among Residents from Southeast and North Regions of Brazil.

    Science.gov (United States)

    Cruz, Helena Medina; de Paula, Vanessa Salete; Villar, Livia Melo

    2018-01-24

    Few data are available regarding viral hepatitis perception among the general global population. The present study aims to estimate the perception of viral hepatitis in a cohort of individuals living in two geographical regions of Brazil: North (Manaus city (MA)) and Southeast (Rio de Janeiro city (RJ)). A cross-sectional, descriptive study was carried out among 287 subjects recruited in MA (134) and RJ (153). All individuals answered a questionnaire assessing socio-demographic characteristics and viral hepatitis awareness. Participants' responses were scored and divided using interquartile values. Associations between socio-demographic characteristics and knowledge were also evaluated. Interquartile analysis scored 0-21 correct answers as "Very Weak"; 22-27 as "Weak"; 28-31 as "Intermediate"; and 32-47 as "Desirable". Mean ± standard deviations (SD) of correct responses were weak in both MA (24.1 ± 7.0) and RJ (26.3 ± 7.3). Bivariate analysis showed an association between viral hepatitis awareness and both education level ( p < 0.001) and family income ( p < 0.01). Desirable scores were more common in female participants (61%), those aged between 21-30 years (40%), those with a secondary education (51.7%), those who received high income (31.6%), and those from RJ (70.0%). Health education campaigns in these cities are recommended to increase knowledge and reduce the transmission of these viruses.

  2. A Cross-Sectional Study of Viral Hepatitis Perception among Residents from Southeast and North Regions of Brazil

    Directory of Open Access Journals (Sweden)

    Helena Medina Cruz

    2018-01-01

    Full Text Available Few data are available regarding viral hepatitis perception among the general global population. The present study aims to estimate the perception of viral hepatitis in a cohort of individuals living in two geographical regions of Brazil: North (Manaus city (MA and Southeast (Rio de Janeiro city (RJ. A cross-sectional, descriptive study was carried out among 287 subjects recruited in MA (134 and RJ (153. All individuals answered a questionnaire assessing socio-demographic characteristics and viral hepatitis awareness. Participants’ responses were scored and divided using interquartile values. Associations between socio-demographic characteristics and knowledge were also evaluated. Interquartile analysis scored 0–21 correct answers as “Very Weak”; 22–27 as “Weak”; 28–31 as “Intermediate”; and 32–47 as “Desirable”. Mean ± standard deviations (SD of correct responses were weak in both MA (24.1 ± 7.0 and RJ (26.3 ± 7.3. Bivariate analysis showed an association between viral hepatitis awareness and both education level (p < 0.001 and family income (p < 0.01. Desirable scores were more common in female participants (61%, those aged between 21–30 years (40%, those with a secondary education (51.7%, those who received high income (31.6%, and those from RJ (70.0%. Health education campaigns in these cities are recommended to increase knowledge and reduce the transmission of these viruses.

  3. APORTE E DECOMPOSIÇÃO DA SERAPILHEIRA E PRODUÇÃO DE BIOMASSA RADICULAR EM FLORESTAS COM DIFERENTES ESTÁGIOS SUCESSIONAIS EM PINHEIRAL, RJ

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Gabriel Menezes

    2010-01-01

    Full Text Available The aim of this study was to evaluate litter input and decomposition and root biomass of three forest fragments at different successional stages (advanced, medium and initial in Pinheiral Municipality, in the state of RJ, Brazil. To evaluate litter input, 10 conic collectors were installed in each fragment. The root biomass was quantified by monolith method in two periods (wet and dry at depths of 0-10, 10-20 and 20- 30 cm, and 10 samples were collected in each area. To evaluate the decomposition rate in each area, 12 litter bags were distributed. No significant differences were observed for litter input between the areas, but there was a tendency to increase litter input with successional evolution. No significant differences were observed for seasonal litter input between areas during the year, but there was a small increase in the months of July and August. At the advanced stage, litter input could be grouped into two periods: February to July, with lower values; and August to January, with higher values. The leaf fractions and reproductive material input were reduced, while branch and other fractions increased with succession. For litter decomposition, the intermediate stage showed the lowest decomposition constant (k (0.0038 g g -1day-1 and the highest half life time (182 days , followed by the initial (0044 g g -1day-1 and 154 days and advanced (0.0064 g g -1day-1 and 108 days stages. The root biomass in different areas and depths for both two periods studied showed higher values in the advanced stage, followed by the intermediate stage and the lowest values were found in the initial stage. The seasonal root biomass difference occurred mainly in the intermediate stage, with higher values in June.

  4. Pantanal of Cáceres: granulometric composition of bottom sediments in the Paraguay River between the outfall of the Cabaçal River and the city of Cáceres, Mato Grosso, Brazil

    Directory of Open Access Journals (Sweden)

    Gustavo Roberto dos Santos Leandro

    2012-08-01

    Full Text Available The objective of the study was to verify the granulometric composition of bottom sediments along the longitudinal profile of the Paraguay River between the outfall of the Cabaçal River and the city of Cáceres, Mato Grosso, comprised by the geographic coordinates 15°58’00’’ and 16°50’00’’ South Latitude and 57°40’00’’ and 57°44’00’’ West Longitude. Work activity was conducted to characterize the sites and sediments collection with Van Veen sediment sampler (seven samples; textural analysis of the sediments by the pipetting and sieving method (the method uses a combination of sieving and sedimentation. The Paraguay River exhibits a meandering style with two distinct periods (periodic flooding regime and drought that associated with of bottom sediments alternate processes of erosion, transport and deposition from the discernible changes in the complex landscaping. Thus, the concentration of sand in the bed load transported in the channel (five samples is related to environmental elements and land use. The fine sediments are transferred to the features (bays and ponds and flood plain; the intense fluvial dynamics and the course (alluvial deposition areas contribute to changes in channel and morphologic features (capacity transport and sediment depositions.

  5. Molecular identification of Sporothrix species involved in the first familial outbreak of sporotrichosis in the state of Espírito Santo, southeastern Brazil

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    Manoel Marques Evangelista Oliveira

    2013-11-01

    Full Text Available Sporotrichosis is a widespread subcutaneous mycosis caused by the dimorphic fungi now known as the Sporothrix schenckii complex. This complex is comprised of at least six species, including Sporothrix albicans, Sporothrix brasiliensis, Sporothrix globosa, Sporothrix luriei, Sporothrix mexicana and S. schenckii. Cases of sporotrichosis have significantly increased in Brazil over the past decade, especially in the state of Rio de Janeiro (RJ, where an epidemic among cat owners has been observed. The zoonotic transmission from cats to humans suggests a common source of infection and indicates that animals can act as vectors. We performed a molecular characterisation of samples collected during the first outbreak of familial sporotrichosis caused by S. brasiliensis in the state of Espírito Santo, Brazil. These results represent the first description of such an outbreak outside the endemic area of zoonotic sporotrichosis in RJ.

  6. Molecular identification of Sporothrix species involved in the first familial outbreak of sporotrichosis in the state of Espírito Santo, southeastern Brazil.

    Science.gov (United States)

    Oliveira, Manoel Marques Evangelista; Maifrede, Simone Bravim; Ribeiro, Mariceli Araújo; Zancope-Oliveira, Rosely Maria

    2013-11-01

    Sporotrichosis is a widespread subcutaneous mycosis caused by the dimorphic fungi now known as the Sporothrix schenckii complex. This complex is comprised of at least six species, including Sporothrix albicans, Sporothrix brasiliensis, Sporothrix globosa, Sporothrix luriei, Sporothrix mexicana and S. schenckii. Cases of sporotrichosis have significantly increased in Brazil over the past decade, especially in the state of Rio de Janeiro (RJ), where an epidemic among cat owners has been observed. The zoonotic transmission from cats to humans suggests a common source of infection and indicates that animals can act as vectors. We performed a molecular characterisation of samples collected during the first outbreak of familial sporotrichosis caused by S. brasiliensis in the state of Espírito Santo, Brazil. These results represent the first description of such an outbreak outside the endemic area of zoonotic sporotrichosis in RJ.

  7. FONTES E TRANSPORTE DE METAIS PESADOS PARA ENSEADA DE JURUJUBA (BAIA DE GUANABARA RJ - BRASIL

    Directory of Open Access Journals (Sweden)

    José Antônio Baptista Neto

    2005-12-01

    Full Text Available As fontes de sedimentos e metais pesados para um estuário urbanizado são complexas e difusas. Esta pesquisa tem como objetivo acessar as principais fontes de metais pesados para a enseada de Jurujuba (RJ. Analisaram- se as concentrações dos elementos Cr, Cu, Ni, Pb, Zn e Fe, em amostras de solo, rios e escoamento superficial urbano, bem como sedimentos de marinas. Apesar de se poderem distinguir as fontes naturais das antrópicas de metais pesados para a Enseada de Jurujuba, é evidente que os processos de urbanização são os principais responsáveis pelas maiores concentrações de metais pesados para a enseada, através de rios e escoamento superficial urbano. No entanto, não se podem desprezar a deposição atmosférica e as atividades náuticas como importantes fontes de poluição.Palavras-chave: fontes de sedimentos, poluição de metais pesados, Enseada de Jurujuba, processo de urbanização.

  8. Sediment Acoustics

    National Research Council Canada - National Science Library

    Stoll, R

    2001-01-01

    ... variables such as porosity and grain-size distribution. The model is based on the classical Biot theory extended to take into account various mechanisms of energy loss that are known to be important in marine sediments...

  9. Visual Sedimentation

    OpenAIRE

    Huron, Samuel; Vuillemot, Romain; Fekete, Jean-Daniel

    2013-01-01

    International audience; We introduce Visual Sedimentation, a novel design metaphor for visualizing data streams directly inspired by the physical process of sedimentation. Visualizing data streams (e. g., Tweets, RSS, Emails) is challenging as incoming data arrive at unpredictable rates and have to remain readable. For data streams, clearly expressing chronological order while avoiding clutter, and keeping aging data visible, are important. The metaphor is drawn from the real-world sedimentat...

  10. Spotlight: Brazil.

    Science.gov (United States)

    Carter, M

    1996-08-01

    Brazil is South America's largest country and home to nearly half of the continent's people. Despite solid economic growth, Brazil has one of the world's widest income disparities. In the early 1990s, nearly 40% of urban and 66% of rural Brazilians lived in poverty. The streets of Brazil's cities are home to a large population of street children. Although it is difficult to estimate, 10 million children and youths may be either homeless or making a meager living off of the streets. Street children may be linked to prostitution and drugs and be the targets or perpetrators of violence. Child labor is an issue in Brazil. Today an estimated 30% of rural children and 9% of urban children ages 10-13 work in the formal economy. In some rural areas, 60% of workers are ages 5-17. Child labor also contributes to Brazil's relatively low educational attainment levels. UNICEF estimates that around 1990 only 1/3 of all Brazilian children continued on to secondary school, compared to 74% and 47%, respectively, for the Latin America and Caribbean regions. Immunization rates among Brazil's children are rising but still lag slightly behind regional averages. The mortality rate for children under age 5 decreased dramatically from 181 deaths for every 1000 live births in 1960 to 61/1000 in 1994. During the same time period, the average number of children born to a woman during her lifetime dropped from 6.2 to 2.8. This fertility decline is related in part to increased access to and acceptance of family planning. Contraceptive prevalence, including traditional and modern methods, is around 66%, with female sterilization and the pill being the most popular methods. Brazil's abortion rates are high, despite laws limiting access to abortion services. One estimate suggests that about 30% of all pregnancies are terminated through abortion each year.

  11. Assessment of environmentally available metals in sediment samples from water for public supply of the city of Palmas, Tocantis, Brazil; Avaliacao dos metais ambientalmente disponiveis em amostras de sedimento de pontos de captacao de agua para abastecimento publico de Palmas, TO, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Bruna Rafaela

    2012-07-01

    The sediments are an important compartment used as a tool for assessment of aquatic ecosystems quality, for indicating the presence of contaminants released continuously into the environment as a result of human activities. Among chemical substances discharged to surface water, there are metals that in undesirable amounts, can be toxic to biota. Due to the importance of sediment and of shortage of data of water quality of the Araguaia-Tocantins river system, the present study conducted an assessment of environmentally available metals in sediment samples from water for public supply of the city of Palmas, in Tocantins, Brazil. The concentrations of As, Cd, Pb and Se were analyzed by Graphite Furnace Atomic Absorption Spectrometry (GFAAS), Ag, Al, B, Ba, Be, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Sb, Sc, Si, Ti, V and Zn were analyzed by Inductively Coupled Plasma Optical Emission Spectrometry (ICPOES) and Hg by Cold Vapor Atomic Absorption Spectrometry (CVAAS). Two partial solubilization processes were performed for a comparative study, one with HCl 0,1 M and agitation at room temperature, considered a milder method for metal extraction from anthropogenic origin, and another with HNO{sub 3} 8 M and microwave heating, considered as an alternative to more complex methods of total digestion, since it provides a good evaluation of the total concentration of the elements. The sediment quality evaluation was realized by comparing the concentration values of the elements As, Cd, Cr, Cu, Hg, Ni, Pb and Zn with the quality guidelines (TEL and PEL) adopted by Canadian Council of Minister of the Environment (CCME), to thereby contribute to the environmental quality of the water of the Araguaia-Tocantins river system. (author)

  12. Caracterização hidroambiental da bacia hidrográfica do rio Debossan, Nova Friburgo, RJ Enviromental characterization of Debossan river watershed, Nova Friburgo, RJ

    Directory of Open Access Journals (Sweden)

    Christiany Araujo Cardoso

    2006-04-01

    Full Text Available O objetivo deste trabalho foi caracterizar o comportamento hidrológico, o volume de entrada e saída de água da bacia hidrográfica do rio Debossan, onde se localiza uma importante estação de captação de água, administrada pela Concessionária de Águas e Esgotos de Nova Friburgo LTDA. (CAENF, inserida na Reserva Ecológica de Macaé de Cima, Município de Nova Friburgo, Rio de Janeiro. Para isso, foram obtidos dados de vazão e precipitação diários do período de janeiro de 2002 a dezembro de 2004. A partir desses dados, foram calculados alguns parâmetros hidrológicos, como vazão específica e deflúvio. A precipitação média observada nos três anos foi de 2.163 mm, sendo que os meses de dezembro/2002 e janeiro/2003 apresentaram os máximos valores. A vazão média anual no período foi de 0,86 m³/s, apresentando o mês de dezembro de 2002 com maior índice e setembro de 2004 com o menor. O balanço hídrico, em termos médios anuais nos três anos de medições, apresentou uma evapotranspiração de 1.923,04 mm, equivalendo a 88% da precipitação convencional. Pode-se dizer que o ecossistema florestal exerce efeito tamponante sobre a quantidade de água da bacia hidrográfica, mantendo uma grande vazão nos meses de menor pluviosidade. Ao analisar a relação entre a entrada de água na bacia, o uso atual do solo e a quantidade de água produzida, concluiu-se que uma bacia hidrográfica bem preservada tem fundamental importância na manutenção constante da vazão ao longo do ano, além da visível participação na qualidade da água.The objective of this work was to characterize the hydrological behavior and the volume of water entering and leaving the Debossan river watershed, where an important water captation plant is situated, managed by the Nova Friburgo Water and Sewage Treatment Company LTDA (CAENF, within the 'Macaé de Cima' Ecological Reserve, Nova Friburgo-RJ. Data of daily flow and precipitation were collected

  13. Illegal occupations in Permanent Preservation Areas: a case study in the city of Campos dos Goytacazes, RJ

    Directory of Open Access Journals (Sweden)

    Frank Pavan de Souza

    2011-02-01

    Full Text Available Permanent Preservation Areas are constantly and illegally occupied by the population, either to establish residence, or to develop business activities. In Campos dos Goytacazes, RJ, these areas have often been occupied since sugarcane mill suppliers began to use state-owned land to cultivate sugar cane used in ethanol production, molasses and sugar. This article presents aspects of economic development in the city, reviews the history of urban development with the occupation of public spaces, and also presents discussion of regularization in areas of permanent preservation.

  14. Sensitivity of the marine benthic copepod Tisbe biminiensis (copepoda, harpacticoida) to potassium dichromate and sediment particle size

    OpenAIRE

    Cristiane M. V. Araújo-Castro; Souza-Santos, Lília P.; Torreiro,Anny Gabrielle A .G.; Garcia, Karina S.

    2009-01-01

    For the future use of the marine benthic copepod Tisbe biminiensis in solid-phase sediment toxicological bioassays, the present study investigated the effect of muddy sediment from the Maracaípe estuary (northeastern Brazil), sediment particle size and the reference toxicant potassium dichromate on the species. Muddy sediment from Maracaípe can be used as control sediment, since it does not interfere in the copepod life-cycle and has metal contamination levels that are unlikely to produce any...

  15. APORTE DE NUTRIENTES E BIOMASSA VIA SERRAPILHEIRA EM SISTEMAS AGROFLORESTAIS EM PARATY (RJ

    Directory of Open Access Journals (Sweden)

    Nina Duarte Silveira

    2007-06-01

    Full Text Available O objetivo deste trabalho foi avaliar a sustentabilidade ambiental de Sistemas Agroflorestais Regenerativos e Análogos (Safra, utilizando-se como indicadores de sustentabilidade ambiental o aporte de biomassa e nutrientes via serrapilheira de espécies arbóreas plantadas. Este trabalho faz parte das ações do PRODETAB – projeto 039 e foi desenvolvido na Fazenda Goura Vrindávna, Paraty, RJ. Foram plantadas 28 espécies arbóreas de múltiplos usos em três tratamentos agroflorestais, Safra Mínimo (sistema simplificado de enriquecimento de bananal, Safra Absoluto (sistema adensado e diversificado e Safra Modificado (mesma composição do anterior e com adubação do solo. Para a avaliação do aporte de nutrientes via serrapilheira; foram coletadas amostras nos três tratamentos Safras e em dois tratamentos testemunhas (Bananal e Capoeira por meio de coletores de 625 cm2, 15 meses após o plantio. Nas amostras, foram feitas as determinações dos teores e conteúdos de micro e macronutrientes. O Safra Mínimo foi o sistema que depositou maior peso de serrapilheira (32,4 Mg ha-1 e aportou maiores conteúdos de micro e macronutrientes. Com exceção do C e H, o N foi o que apresentou os maiores conteúdos nos cinco tratamentos, e em relação aos micronutrientes, o Fe foi o elemento de maior aporte. A poda da vegetação nos Safras favoreceu a ciclagem de nutrientes e contribuiu para elevação dos conteúdos destes na serrapilheira. Os Safras, sob o aspecto do aporte de nutrientes via serrapilheira, foram os sistemas mais promissores na recomposição dessas funções ecológicas, quando comparados à Capoeira e monocultura de banana.

  16. Impacto sonoro do aeroporto Santos Dumont/RJ: análise e medidas de controle

    Directory of Open Access Journals (Sweden)

    José R. de Lima Neto

    2014-09-01

    Full Text Available A poluição sonora é parte cotidiana da vida nas grandes cidades. Dentre as fontes sonoras relevantes no contexto das cidades, tais como o ruído viário, uma que oferece desafios particulares é a relacionada ao sobrevoo de aeronaves, sejam aviões comerciais, jatos particulares ou helicópteros. Por se tratar de fontes intensas de ruído e das características das suas trajetórias (extensas e acima das habitações, tanto a avaliação do incômodo gerado, como eventuais medidas de mitigação são complexas e de difícil implementação.Dessa forma, o desconforto acústico gerado nas comunidades próximas as rotas de pouso e decolagem de grandes aeroportos tornou-se alvo de grandes reclamações por parte dos moradores que tem seu conforto ameaçado, o que reforça a necessidade de enfrentar estes desafios e atacar este problema.Assim, nesse trabalho, buscamos avaliar o impacto sonoro das aeronaves que possuem como destino ou são oriundas do aeroporto Santos Dumont/RJ (SBRJ, através de simulação computacional de ruído, em uma região próxima ao aeroporto com área de aproximadamente 39 km². A partir da quantificação e determinação das áreas efetivamente afetadas pelo ruído aeronáutico, e da comparação dos valores obtidos com as normas da legislação brasileira, esse trabalho visa mapear possíveis regiões de conflito e fornecer informações que orientem possíveis medidas mitigadoras e de controle de ruído plausíveis para a realidade atual. Palavras-Chave: Acústica, Ruído aeronáutico, Impacto Sonoro de Aeroportos.

  17. Diversidade da macrofauna edáfica em diferentes usos da terra em Pinheiral, RJ

    Directory of Open Access Journals (Sweden)

    André Barbosa Vargas

    2014-01-01

    Full Text Available O uso da terra, na maioria das vezes, altera consideravelmente a composição e riqueza da fauna edáfica, alterando a cobertura florestal existente. Deste modo, funções ecológicas e biológicas desenvolvidas por estes organismos são afetadas e/ou perdidas. Portanto, os objetivos foram avaliar a biodiversidade de artrópodes em quatro ambientes distintos, no campus do IFRJ, em Pinheral, RJ. Foram instaladas 12 armadilhas no solo do tipo “pitfall” em cada ambiente, espaçadas 10m uma da outra. Foram amostrados 19 grupos de artópodes, sendo 18 ordens e uma família (Formicidae, a qual apresentou 100% de ocorrência em todos os ambientes e períodos de coleta. No período chuvoso foram coletadas 16 ordens e no período seco 14. No período chuvoso o Plantio de eucalipto apresentou maior número de ordens (14, seguido de Pasto (9, Cultivo de goiaba (8 e Reflorestamento com (6. No período seco se observou um resultado contrário com o ambiente de Reflorestamento apresentando 13 ordens, seguido de Cultivo de goiaba (11, Plantio de eucalipto (8 e Pasto com (6. Entretanto, estas variações não foram significativas entre os ambientes e entre os períodos de coleta. Os índices de diversidade não apresentaram diferenças significativas entre os ambientes, mas sim para os períodos de coleta. A ordenação mostrou agrupamentos dos blocos, separando os ambientes. Portanto, a biodiversidade de artrópodes apresenta diversidade distinta para os ambientes, demonstrando a importância da heterogeneidade ambiental na manutenção da biodiversidade e das funções ecológicas prestadas pelos organismos. Os resultados também reforçam a utilização da macrofauna edáfica em avaliações e estudos ambientais como indicadora de biodiversidade e da qualidade ambiental. 

  18. Larvas de insetos associadas a Clusia hilariana Schltdl. (Clusiaceae na Restinga de Jurubatiba, RJ, Brasil Insect larvae associated with Clusia hilariana Schltdl. (Clusiaceae in the Restinga de Jurubatiba, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Vagner Reis da Silveira

    2008-01-01

    Full Text Available Clusia hilariana é uma das espécies de plantas mais abundantes no Parque Nacional, desempenhando um papel importante na dinâmica sucessional desse ecossistema de restinga. Esse trabalho apresenta a composição e aspectos ecológicos das espécies de larvas de mariposas encontradas em C. hilariana. Em 40 plantas, mensalmente vistoriadas, foram obtidas quatorze espécies de lepidópteros. Chloropaschia granitalis foi a espécie de larva mais abundante alimentando-se nessa espécie de planta.Clusia hilariana is one of the most abundant plant species in the National Park playing important role at the sucessional dynamic of the restinga ecosystem. This paper presents the composition and ecological aspects of caterpillars species found on C. hilariana. From 40 plants monthy inspected, fourteen species of Lepidoptera were obtained. Chloropaschia granitalis (Pyralidae was the most abundant species feeding on this plant species.

  19. Outbreak of Tinea capitis by Trichophyton tonsurans and Microsporum canis in Niterói, RJ, Brazil Microepidemia de tinha do couro cabeludo por Trichophyton tonsurans e Microsporum canis em Niterói, RJ, Brasil

    Directory of Open Access Journals (Sweden)

    Loan Towersey

    1992-06-01

    Full Text Available 18 girls from an orphanage (Orfanato Santo Antônio in Niterói presented tinea capitis due to Trichophyton tonsurans (15 cases - 83.3% and Microsporum canis (3 cases - 26.7%. Comments are made about clinical, mycological and therapeutic aspects of this microepidemy18 meninas internas do Orfanato Santo Antônio em Niterói apresentaram tinha do couro cabeludo causada por Trichophyton tonsurans (15 casos - 83,3% e Microsporum canis (3 casos - 26,7%. São discutidos aspectos clínicos e terapêuticos desta microepidemia

  20. Plantas medicinais e seus usos pelos sitiantes da Reserva Rio das Pedras, Mangaratiba, RJ, Brasil Medicinal plants and its uses by the ranchers from the Rio das Pedras Reserve, Mangaratiba, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Maria Franco Trindade Medeiros

    2004-06-01

    Full Text Available Os sitiantes que residem na Reserva Rio das Pedras, localizada no município de Mangaratiba, Estado do Rio de Janeiro, têm origem nos meeiros que trabalhavam nas plantações de banana da antiga fazenda Goiabal. Atualmente, esta fazenda corresponde ao Club Méditerranée, na cota próxima ao oceano Atlântico e à Reserva Rio das Pedras, acima da Rodovia Rio/Santos (BR-101, sendo um remanescente de Floresta Ombrófila Densa no Estado. O objetivo deste estudo foi resgatar informações sobre o uso de plantas medicinais pelos sitiantes que ainda residem nesta Reserva. Através de entrevistas estruturadas e semi-estruturadas aplicadas junto à comunidade, pôde-se fazer um levantamento das plantas presentes ao redor das casas dos mesmos. Ao todo foram citadas 36 espécies medicinais, distribuídas em 34 gêneros e 25 famílias. Estas espécies estão relacionadas a 28 usos medicinais, organizados em sete categorias. Predominaram espécies de plantas herbáceas (21 spp. seguidas das arbustivas (oito spp. e arbóreas (cinco spp.. Constatou-se que a folha foi a parte mais utilizada e o modo de preparo do remédio foi o decocto. Quantificou-se o número de citações por informante para cada táxon, possibilitando a indicação das espécies mais utilizadas na área, como a erva-de-santa-maria (Chenopodium ambrosioides L. e a pitanga (Eugenia uniflora L..The ranchers who live in Rio das Pedras Reserve, which lies in Mangaratiba County, State of Rio da Janeiro, came from sharecroppers who worked at the banana plantation of the farmer Goiabal farm. Nowadays, that farm corresponds to the Méditerranée Club in the area next to the Atlantic Ocean and to Rio das Pedras Reservation, above the Rio/Santos highway (BR-101, it is a remainder of the Dense Ombrophylous Forest in the State. The aim of this study was to collect information about the use of medicinal plants by the ranchers who still live in that Reservation. A survey of the plants, which could be found in the area surrounding their houses, was done through the use of structured and semi-structured interviews. In all, 36 medicinal vegetal speciesdistributed in 34 genera and in 25 families were mentioned. Those species are related to 28 medicinal uses, organized in seven categories. The herb species (21 species prevailed, followed by shrubs (eight species and arboreal (five species. The leaf was found to be the part of the plant most used and the mode of preparation of the medicine was the decoction. The number of citations by the informants for each taxon was quantified, making it possible to indicate the worm seed (Chenopodium ambrosioides L. and pitanga (Eugenia uniflora L. as the most used species in the area.

  1. Assessment of metal concentrations in sediment samples from Billings Reservoir, Rio Grande tributary, Sao Paulo, Brazil; Avaliacao da concentracao de metais em amostras de sedimento do Reservatorio Billings, Braco Rio Grande, Sao Paulo, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Bostelmann, Eleine

    2006-07-01

    The present study chemically characterized sediment samples from the Billings reservoir, Rio Grande tributary, in the Metropolitan region of Sao Paulo, by determining metal concentration and other elements of interest. The chosen chemical parameters for this characterization were Aluminum, Arsenic, Barium, Cadmium, Copper, Chromium, Iron, Lead, Manganese, Mercury, Nickel, Selenium and Zinco. These parameters are also used in the water quality index, with the exception of Selenium. The concentrations were determined through different analytical techniques such as atomic absorption spectrometry (FAAS, GFAAS and CVAAS), optical emission spectrometry (ICP OES) and neutron activation analysis. These analytical methodologies were assessed for precision, accuracy and detection and/or quantification limits for the sediment elements in question. Advantages and disadvantages of each technique for each element and its concentration were also discussed. From these assessments the most adequate technique was selected for the routine analysis of sediment samples for each element concentration determination. This assessment verified also that digestion in a closed microwave system with nitric acid is efficient for the evaluation of extracted metals of environmental interest. The analytical techniques chosen were equally efficient for metals determination. In the case of Cd and Pb, the FAAS technique was selected due to better results than ICP OES, as it does not present matrix interference. The concentration values obtained for metals As, Cd, Cu, Cr, Hg, Ni, Pb and Zn in the sediment samples were compared to Canadian Council of Minister of the Environment (CCME) TEL and PEL values. (author)

  2. Geochronologic study of sediments deposition of two lakes from the Rio Negro basin, Amazonas State, Brazil; Estudo geocronologico da deposicao de sedimentos de dois lagos da bacia do rio Negro/AM

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Ana Carla F.; Mozeto, Antonio A.; Cazotti, Raul I. [Sao Carlos Univ., SP (Brazil). Dept. de Quimica. Lab. de Biogeoquimica Ambiental]. E-mail: anacarla@dq.ufscar.br; Nascimento Filho, Virgilio F. [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil). Lab. de Instrumentacao Nuclear; Taddei, Maria Helena [Comissao Nacional de Energia Nuclear, Pocos de Caldas, MG (Brazil). Laboratorio

    2000-07-01

    Since 1963 the radionuclide {sup 210}Pb became an important tool for dating (geochronology) recent sediments (up to 120 years). In this work the sedimentary geochronology of two lakes from the Negro River Basin was determined, using different radiochemical separation methods for {sup 210}Pb and {sup 226}Ra. (author)

  3. Sediment Acoustics.

    Science.gov (United States)

    1980-04-02

    approximately one grain size (0.35 mm) out of 600 grain size total. The experiment was repeated with a 2.54 cm thick layer of water filled polyurethane foam ...Kaolinite Clay for Shear Waves 70 it vi .- m -77- I. INTRODUCTION A determination of the viscoelastic properties of ocean sediments can be made by...temperature of these additional viscoelastic properties have not been studied in detail. This section contains shear wave and compressional wave data

  4. Avaliação da produtividade de fitomassa e acúmulo de N, P e K em leguminosas arbóreas no sistema de aléias, em Campos dos Goytacazes, RJ Evaluation of phytomass productivity and N, P and K accumulation of shrub legumes in alley cropping system in Campos dos Goytacazes (RJ

    Directory of Open Access Journals (Sweden)

    Luciano Rodrigues Queiroz

    2007-01-01

    Full Text Available O objetivo deste trabalho foi avaliar a produtividade de fitomassa da parte aérea e o acúmulo de N, P e K nas leguminosas arbóreas em sistemas agroflorestais de aléias, bem como verificar o efeito da adição de fósforo sobre as leguminosas. Foram realizados experimentos de campo com a utilização de leguminosas, com e sem adição de P, por dois anos consecutivos de avaliação, em Campos dos Goytacazes,RJ. Os tratamentos consistiram do sistema de aléias com Albizia lebbeck (L. Benth., Peltophorum dubium (Spreng. Taub., Leucaena leucocephala (Lam. de Wit., Cajanus cajan (L. Millsp., Sesbania virgata (Cav. Pers., Mimosa caesalpiniaefolia Benth. e Gliricidia sepium (Jacq. Pers. Após oito meses de plantio das leguminosas, estas foram podadas a 1,5 m de altura, restando a haste principal. O material podado foi pesado, descartando-se os ramos com diâmetro superior a 1,5 cm e sendo retiradas as amostras compostas para determinações da fitomassa seca e dos teores de N, P e K. Efetuou-se nova poda 80 dias após a primeira, e pesou-se esse material. No primeiro ano, o guandu mostrou-se superior na produtividade de fitomassa seca e no acúmulo de N, P e K. No segundo ano de avaliação, no experimento com adição de P a leucena e a canafístula assemelharam-se ao guandu na produtividade de fitomassa, enquanto a leucena e o guandu, no acúmulo de N e P, porém a leucena superou o guandu e a canafístula no acúmulo de K na parte aérea. A aplicação de P teve efeito positivo na produtividade de fitomassa seca de algumas espécies.The objective of this study was to evaluate the shoot phytomass and shrub legumes N, P and K accumulation in agroforestry system (alley cropping system and study the effect of P fertilization. Two field experiments were carried out - without and with P application - for two years: 2004 and 2005, using shrub legumes in Campos dos Goytacazes - RJ - Brazil. The treatments consisted of alley cropping system with the

  5. PRINCIPAIS PARASITOS INTESTINAIS DIAGNOSTICADOS EM GALINHAS DOMÉSTICAS CRIADAS EM REGIME EXTENSIVO NA MUNICIPALIDADE DE CAMPOS DOS GOYTACAZES, RJ MAIN INTESTINAL PARASITES DIAGNOSED IN DOMESTIC CHICKENS RAISED IN EXTENSIVE REGIMEN IN THE MUNICIPALITY OF CAMPOS DOS GOYTACAZES, RJ

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    Luciano Grillo de Almeida

    2009-09-01

    Full Text Available Um estudo sobre as parasitoses que ocorrem em galinhas domésticas criadas em regime extensivo na região de Campos dos Goytacazes, RJ, foi realizado durante o ano de 2004. Este se baseou na realização de necropsias, análises de amostras de fezes de 51 aves, bem como na comparação entre os métodos empregados. Os ovos de parasitas encontrados nos exames coproparasitológicos pertenciam a helmintos dos gêneros Heterakis, Ascaridia, Capillaria, Oxyspirura, Cheylospirura e Strongyloides. O único cestoide encontrado foi o do gênero Raillietina. Nesta pesquisa os resultados qualitativos das técnicas laboratoriais de exame de fezes coincidiram na maioria das vezes com os resultados das necropsias, tendo demonstrado maior eficiência apenas no diagnóstico da presença do coccídeo Eimeria sp, pela visualização dos oocistos do parasito.

    PALAVRAS-CHAVES: Aves domésticas, necropsia, parasitoses.
    A study on the parasitism that occur in the extensive creations of domestic hens in Campos dos Goytacazes city, RJ, was carried through in the period of year of 2004. This was based on the necropsy and the analysis of 51 samples of faeces of deriving hens of creations located in urban and farm areas. The joined parasitic eggs belonged the helminthes Heterakis, Ascaridia, Capillaria, Oxyspirura, Cheylospirura and Strongyloides. The only joined cestode were of Raillietina. The biggest prevalence, however, was of oocysts of the coccidia Eimeria spp. The qualitative results of laboratory techniques of faeces examination concurred with the results of necropsy for helminthes and indicated more efficacy for eimeriosis diagnosis.

    KEY WORDS: Necropsy, parasitic diseases, poultry.

  6. A Putative Type III Secretion System Effector Encoded by the MA20_12780 Gene in Bradyrhizobium japonicum Is-34 Causes Incompatibility with Rj4 Genotype Soybeans.

    Science.gov (United States)

    Tsurumaru, Hirohito; Hashimoto, Syougo; Okizaki, Kouhei; Kanesaki, Yu; Yoshikawa, Hirofumi; Yamakawa, Takeo

    2015-09-01

    The nodulation of Bradyrhizobium japonicum Is-34 is restricted by Rj4 genotype soybeans (Glycine max). To identify the genes responsible for this incompatibility, Tn5 mutants of B. japonicum Is-34 that were able to overcome this nodulation restriction were obtained. Analysis of the Tn5 mutants revealed that Tn5 was inserted into a region containing the MA20_12780 gene. In addition, direct disruption of this gene using marker exchange overcame the nodulation restriction by Rj4 genotype soybeans. The MA20_12780 gene has a tts box motif in its upstream region, indicating a possibility that this gene encodes a type III secretion system (T3SS) effector protein. Bioinformatic characterization revealed that the MA20_12780 protein contains the small ubiquitin-like modifier (SUMO) protease domain of the C48 peptidase (ubiquitin-like protease 1 [Ulp1]) family. The results of the present study indicate that a putative T3SS effector encoded by the MA20_12780 gene causes the incompatibility with Rj4 genotype soybeans, and they suggest the possibility that the nodulation restriction of B. japonicum Is-34 may be due to Rj4 genotype soybeans recognizing the putative T3SS effector (MA20_12780 protein) as a virulence factor. Copyright © 2015, American Society for Microbiology. All Rights Reserved.

  7. Siphonaptera parasites of wild rodents and marsupials trapped in three mountain ranges of the Atlantic forest in southeastern Brazil.

    Science.gov (United States)

    de Moraes, Leandro Bianco; Bossi, David Eduardo Paolinetti; Linhares, Arício Xavier

    2003-12-01

    A study of the associations between small mammals and fleas was undertaken in three areas of the Atlantic Forest in Southeastern Brazil: Serra da Fartura, SP, Serra da Bocaina, SP, and Itatiaia, RJ. Trapping of small rodents and marsupials was done every 3 months during 2 years, from June 1999 to May 2001. A total 502 rodents (13 species) and 50 marsupials (7 species) were collected, and 185 hosts out of 552 (33.5%) captured in the traps were parasitized by 327 fleas belonging to 11 different species. New host records were determined for several flea species, and 5 significant associations between fleas and hosts were also found.

  8. Cultura Política e Polos Regionais: comparando Campos dos Goytacazes (RJ com Maringá ampliada (PR

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    Sergio de Azevedo

    2015-01-01

    Full Text Available The article analyzes in comparative perspective the similarities and differences between the political culture of the population resident in Campos dos Goytacazes (RJ and Maringá, Paysandú and Sarandi, set of municipalities that we call Maringá magnified. On the comparative analysis between the Regional Poles two major theoretical questions that unify the proposal of this work are prioritized. The first corresponds to the classical concerns relating to the operation of democracy and citizens’ participation in the public life. The second refers to the impacts that the processes of change, differentiation and trajectory of life impacted in different groups, personal values that present, in different ways, an arc that goes from traditional conservatism to the legitimization of new habits and posture.

  9. Atlas digital: uma contribuicao para o sistema de informacoes do municipio de Sao Joao de Meriti – RJ

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    Ricardo Araujo Mathias

    2011-07-01

    Full Text Available Um Atlas Digital é um atlas que pode ser acessado atraves de um computador, sendo possivel a utilizacao de uma variada gama de temas, formatos e escalas. Neste trabalho apresenta-se um prototipo de Atlas Digital como colaboracao ao Sistema de Informacao Municipal – SIM, para o municipio de Sao João de Meriti, RJ. O SIM tem como meta os servicos municipais, sendo as suas informacoes fundamentais para a melhoria da gestao das prefeituras. A pesquisa foi direcionada para o tema da habitabilidade, que consiste num conjunto de condicoes voltadas para a criacao de um habitat saudavel, conseguinte foram trabalhados os subtemas: infraestrutura de abastecimento de agua, esgoto, coleta de lixo, saude e educacao.

  10. Fuel data standardization study for JP-4, JP-5, JP-7, and RJ-5 combusted in air. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Ross, J.L.

    1974-03-01

    This report summarizes a study conducted to standardize the fuel performance data used in the Ramjet and Laser Aerodynamics Division of the Air Force Aero Propulsion Laboratory. The NASA one-dimensional equilibrium (ODE) thermochemical computer program was used to generate the fuel combustion product properties contained in the tables and graphs in this report. Thermochemical equilibrium data (molecular weight, specific heat ratio, and ideal temperature rise) is presented for JP-4, JP-5, JP-7, and RJ-5 combusted in air at constant pressures of 1, 5, and 10 atmospheres, at fuel-to-air ratios from 0.025 to 0.10, and at total air temperatures from 400 to 2500R. The combustion process was assumed adiabatic and a constant fuel temperature of 298.15K was maintained. The fuel and air properties used in the calculations are presented.

  11. Water quality of the Lagoa do Taí in São João da Barra, RJ

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    Laci Gonçalves Viana

    2013-09-01

    Full Text Available The Environmental Protection Area of Grussaí has been planned within the region of the Porto do Açu, onsisting of the following lagoons: Iquipari, Salgada, Grussaí, and Taí. This study was conducted in the Lagoa do Taí, 5th district of São João da Barra, RJ, and aimed to evaluate its water quality through physical, chemical, and microbiological analyses from July to December 2012. The evaluation was performed on temporal and spatial scale. We evaluated the following parameters: DO, BOD, E. coli, turbidity, pH and total hosphorus. Of the six parameters evaluated against the limits established by CONAMA Resolution 357/05, only the total phosphorus averaged nonconforming.

  12. Morphology and sedimentology of the Itaipú Embayment - Niterói/RJ

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    SALVADOR MARCUS VINICIUS S.

    2002-01-01

    Full Text Available Bathymetric and sedimentological data from water depths between 3 and 28 meters are the basis of a detailed bathymetric map of the Itaipú Embayment and an understanding of its sedimentary dynamics. Shallower than 16 meters the contours are parallel to the shoreline whereas the morphology of the deeper bottom is influenced by the Menina, Mãe, and Pai islands. Medium sand is prevalent, with local variations in more protected or less protected areas. Minor amount of black mud possibly derives from the Itaipú Lagoon. Siliciclastic granules and pebbles may be relict. The Itaipú Embayment's bottom morphology is controlled by stormy waves and the calmer easternmost part of the embayment presents a tendency to accumulate finer sediments.

  13. Simulação da produção de sedimentos para a microbacia hidrográfica do Ribeirão dos Marins (SP Sediment yield simulation for the watershed Ribeirão dos Marins, State of São Paulo, Brazil

    Directory of Open Access Journals (Sweden)

    R. E. Machado

    2003-08-01

    Full Text Available O modelo SWAT (Soil and Water Assessment Tool foi aplicado para simular a carga de sedimentos produzida pela microbacia hidrográfica do Ribeirão dos Marins, em Piracicaba (SP, no biênio 1999/2000. A aplicação do modelo requer a entrada dos dados na forma espacializada que foi feita com o auxílio de uma interface entre o modelo e um Sistema de Informações Geográficas (SIG's. A microbacia foi discretizada em sub-bacias para determinar os parâmetros de entrada no modelo. Os resultados obtidos na simulação da produção de sedimentos foram comparados aos dados observados em um posto hidrossedimentométrico, localizado no terço superior da microbacia, utilizando o Coeficiente de Eficiência de Nash e Sutcliffe (COE e o desvio dos dados simulados em relação aos observados (Dv. Para as condições específicas da microbacia do Ribeirão dos Marins, os resultados obtidos na simulação da produção de sedimentos pelo modelo, após a calibração, foram de 0,83, para o COE, e de -3,2 %, para o Dv, indicando um bom ajuste dos dados simulados comparados aos dados observados.The SWAT (Soil and Water Assessment Tool model was applied to simulate the sediment yield in the watershed Ribeirão dos Marins, in Piracicaba, Brazil, for the biennial period of 1999/2000. The application of this model requires georeferenced input data, provided by an interface between the model and a Geographic Information System (GIS. The watershed was divided into sub-basins, and parameters were separately determined for each area. The simulated sediment yields were compared to the observed data of a gauge station located in the upper third of the watershed, using the Nash and Sutcliffe Coefficient (COE and the deviation between simulated and measured data (Dv. After calibration the simulation results of the sediment yield showed a COE of 0,83 and a Dv of -3,2%, indicating that the simulated and observed data tally basically.

  14. Lutz's spontaneous sedimentation technique and the paleoparasitological analysis of sambaqui (shell mound sediments

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    Morgana Camacho

    2013-04-01

    Full Text Available Parasite findings in sambaquis (shell mounds are scarce. Although the 121 shell mound samples were previously analysed in our laboratory, we only recently obtained the first positive results. In the sambaqui of Guapi, Rio de Janeiro, Brazil, paleoparasitological analysis was performed on sediment samples collected from various archaeological layers, including the superficial layer as a control. Eggs of Acanthocephala, Ascaridoidea and Heterakoidea were found in the archaeological layers. We applied various techniques and concluded that Lutz's spontaneous sedimentation technique is effective for concentrating parasite eggs in sambaqui soil for microscopic analysis.

  15. Lutz's spontaneous sedimentation technique and the paleoparasitological analysis of sambaqui (shell mound) sediments

    Science.gov (United States)

    Camacho, Morgana; Pessanha, Thaíla; Leles, Daniela; Dutra, Juliana MF; Silva, Rosângela; de Souza, Sheila Mendonça; Araujo, Adauto

    2013-01-01

    Parasite findings in sambaquis (shell mounds) are scarce. Although the 121 shell mound samples were previously analysed in our laboratory, we only recently obtained the first positive results. In the sambaqui of Guapi, Rio de Janeiro, Brazil, paleoparasitological analysis was performed on sediment samples collected from various archaeological layers, including the superficial layer as a control. Eggs of Acanthocephala, Ascaridoidea and Heterakoidea were found in the archaeological layers. We applied various techniques and concluded that Lutz's spontaneous sedimentation technique is effective for concentrating parasite eggs in sambaqui soil for microscopic analysis. PMID:23579793

  16. Perfil de idosos com internação por quedas nos hospitais públicos de Niterói (RJ Profile of elderly admitted to public hospitals of Niterói (RJ due to falls

    Directory of Open Access Journals (Sweden)

    Fátima de Lima Paula

    2010-12-01

    Full Text Available OBJETIVO: Descrever as características comuns de idosos internados, por quedas, em hospitais públicos do município de Niterói - RJ. MÉTODOS: Estudo seccional com 110 pacientes com 60 anos ou mais, nos hospitais públicos de Niterói, internados devido a fraturas pós-queda. Os dados foram coletados com um questionário multidimensional aplicado por meio de entrevista. Foram utilizadas a análise de correspondência múltipla e a análise de conglomerados para descrever as características dos entrevistados. RESULTADOS: Os resultados apontaram quatro grupos. O primeiro grupo era composto de idosos com melhores condições físicas: não fraturaram o fêmur, eram mais independentes, saíam mais de casa antes da queda, tinham boa visão, permaneceram menos tempo internados e saíram do hospital com alta para casa. Outro grupo apresentou indivíduos em piores condições físicas: os menos independentes, os que ficaram mais tempo internados e os que saíram do hospital por óbito. Ainda foi apontado um grupo dos que fraturaram o fêmur, não tinham boa visão e dos que saíam de casa menos de uma vez por semana. O quarto grupo apontou os que saíam de casa uma a duas vezes por semana e os que ficaram internados de 11 a 30 dias. CONCLUSÕES: A análise de correspondência múltipla foi uma técnica útil para identificar subgrupos de pacientes com características comuns, o que fornece indícios para a criação de estratégias nos programas de prevenção de quedas.OBJECTIVE: to describe the common characteristics of elderly people admitted to public hospitals of Niterói (RJ due to falls. METHODS: Cross-sectional study with 110 elderly patients (60 years and more admitted to public hospitals in Niteroi - RJ, with fractures after falls. Data were collected by a multidimensional questionnaire. Multiple correspondence and cluster analysis were used to describe the characteristics of this population. RESULTS: The results indicated four groups. The

  17. Socioeconomic and environmental profile of artisanal fishing in Macaé, RJ

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    Natalia Raposo da Silva

    2016-12-01

    Full Text Available Although it still has great social and economic importance, accounting for a large number of jobs in coastal communities, fishing has received few government incentives in Brazil,. In the city of Macaé, State of Rio de Janeiro, the situation is no different. Until the late 70s, fishing was considered the main socio-economic activity in the region. However, with the installation of the regional headquarters of Petrobras for oil exploration in 1978,, this scenario changed radically. Based on the hypothesis that the traditional means of use and ownership of fisheries resources in the region has been changed by the economic growth provided by the oil economy, the purpose of this work is to show socio-cultural and environmental importance of artisanal fishing for Macaé. We interviewed twenty-seven fishermen who landed in the warehouse of Macaé. Therefore, the semi-structured questionnaire was used along with bibliographic and documentary analysis. Participant observation as a methodological option was also carried out. Results provide information about the main fishing practices in the city, the environmental profile of fishermen, labor relations, and fish marketing. The profile of the artisanal fishermen of Macaé was established as follows: male; 30-40 years of age; most with uncompleted primary school; 89% are married; 56%  from Macaé; average of 27 years of work in fishing; gillnetting is the most common fishing practice; 82% commercialize production through intermediaries; average monthly income is R$900 deriving exclusively from fishing. Our conclusion is that the district is based on only one economic activity. The fishery supply chain gave way to the oil industry, and economic growth generated by this has not been used to consolidate a multi-pillar, stable, strong local economy. Therefore, it becomes necessary to create effective public policies and devices to maintain environmental quality and provide social improvements for the

  18. IDRC in Brazil

    International Development Research Centre (IDRC) Digital Library (Canada)

    that help the government promote creativity and entrepreneurship. □ Wage inequalities in Brazil and India. Funding: $247,200. Duration: 2013–2015. Grantee: Centro Brasileiro de Analise e Planejamento, Brazil. Although poverty in Brazil and India has diminished, inequality among wage earners remains high. Think tanks ...

  19. Biochemical Education in Brazil.

    Science.gov (United States)

    Vella, F.

    1988-01-01

    Described are discussions held concerning the problems of biochemical education in Brazil at a meeting of the Sociedade Brazileira de Bioquimica in April 1988. Also discussed are other visits that were made to universities in Brazil. Three major recommendations to improve the state of biochemistry education in Brazil are presented. (CW)

  20. Effects of a regional décollement level for gravity tectonics on late Neogene-Quaternary deep-sea clastic sedimentation in the Foz do Amazonas Basin, Brazil

    Science.gov (United States)

    Cruz, A. M.; Gorini, C.

    2015-12-01

    Sets of 2D multi-channel seismic and chronostratigraphic data allowed us to undertake analyses of source to sink processes and triggering mechanisms of the gigantic megaslides previously documented off the NW and SE steep slope settings of the Foz do Amazonas basin. These megaslides comprise two sets of stacked allochthonous masses within the Upper Miocene-Quaternary sedimentary record, now described as Mass-Transport Complexes (MTCs): the Amapá Megaslide Complex (AMC) and the Pará-Maranhão Megaslide Complex (PMMC). Individual megaslides of both MTCs can mobilize to deep waters up to kilometer thick sedimentary series as allochthonous masses with different flow directions, degrees of sediment disruption and internal coherence. Megaslides spread downslope over areas as large as thousands of km2, attaining dimensions comparable to the world's largest mass-transport deposits. The basal and largest megaslide of the AMC (AM1 megaslide) is a quite unique example of mass-transport deposit, since it is interpreted as a dominant carbonate allochthonous mass sourced from a mixed carbonate-siliciclastic platform. According to stratigraphic correlations with global sea-level positions, platform instability would have been triggered between the late Miocene and the end of the Early Pliocene by gravitational collapse of the mixed platform under its own weight, after successive subaerial exposures which were able to generate karstification processes. Siliciclastic-type megaslides, on the other hand, are all sourced from large upslope slide and/or rotated blocks (up to 60 km large in the case of the PMMC).Stratigraphic correlations evidenced that horizon equally acts as the upper décollement level for the gravity tectonic system that operates in the regional scale of the Foz do Amazonas basin. In such a context, results of this work evidence complex links between variable modes of gravity deformation (gravity tectonics and mass wasting), all induced by instability created from

  1. Influence of physicochemical water characteristics in the transport of methane to the atmosphere at Rodrigo de Freitas lagoon, RJ

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    Plínio Carlos Alvalá

    2012-12-01

    Full Text Available The accumulation and decomposition of organic matter in water bodies can increase the potential emission of greenhouse gases to the atmosphere. In this study, in a prospective and exploratory way, we evaluated the relationship between physicochemical characteristics of water on the transport of methane to the atmosphere at Rodrigo de Freitas lagoon, RJ. In 2011, campaigns were carried out in which 200 samples were collected for analysis of superficial methane emission and 30 water samples were collected to verify the dissolution of this gas in the water column, measuring simultaneously both the physicochemical water parameters along this column. The methane flow measurements showed that this lagoon is a source methane emission to the atmosphere with an average flux of 33 ± 10 mgCH4m-2d-1. The evaluation of limnological parameters that could affect the emission flux revealed that the water depth and temperature were the most influential factors in this process. A profile analysis of methane in the water column suggests the existence of a higher concentration of this gas in the region of the sedimentary strata at the bottom of the lagoon. However, the potential emission may not reach the surface, possibly due to the decrease in the rate of vertical diffusion of methane, as a result of the increase of pressure with depth and the presence of methanotrophic bacterias that consume methane throughout the water column.

  2. Commercial capture of the mangrove crab, Ucides cordatus (L., 1763, in the Gargaú mangrove, RJ

    Directory of Open Access Journals (Sweden)

    Ana Paula Madeira Di Beneditto

    2005-05-01

    Full Text Available The purpose of this study was analyze the biometry of the mangrove crab, Ucides cordatus (L., 1763, captured commercially in the Gargaú Mangrove (RJ, comparing common practices with the demands of Law no 52/2003 of IBAM A – Brazilian Agency of Environment and Natural Resources – and making inferences about the fishing community’s perception of the species. From April 2002 to March 2003, 571 specimens were analyzed and the highest frequency of males and females was registered in a carapace width of 6,0 6,5cm. The exploration of the mangrove crab is conducted all year round and the gear known as “redinha” is used in its capture, disrespecting the abovementioned law. However, the capture excludes ovigerous females and small-sized specimens, which reflects the fishing community’s concerns about this resource. The exploitation of this crab population probably interferes in its growth pattern, and managerial action needs to be implemented, considering not only the recommendations of scientific studies, but also the local fishermen’s knowledge of the species.

  3. BURNOUT SYNDROME: PROFILE OF ESTRESS IN TEACHERS WORKING IN HIGHER EDUCATION INSTITUTIONS OF THE BAIXADA FLUMINENSE, RJ

    Directory of Open Access Journals (Sweden)

    Ricardo de Mattos Russo Rafael

    2011-10-01

    Full Text Available Objetivo: analisar o perfil do estresse relacionado ao trabalho em professores atuantes na área de Ciências da Saúde. Métodos: estudo observacional, do tipo transversal, tendo como população alvo os professores da área de Ciências da Saúde. A amostra foi constituída por 80 professores que trabalhavam em duas Universidades da Região da Baixada Fluminense, RJ. O modelo foi analisado com base na criação de um banco de dados informatizados. Resultados: os dados analisados revelam que as mulheres casadas obtiveram um elevado grau de comprometimento das dimensões da Síndrome; que quanto maior a jornada semanal de trabalho, maior a frequência das alterações decorrentes da Síndrome de Burnout, e que quanto maior a frequência semanal de atividades físicas, menor a probabilidade de apresentação do fenômeno. Conclusão: o presente estudou possibilitou destacar as reações físicas, psicológicas e sociais relacionadas com a exposição crônica ao estresse laboral contínuo. Descritores: Esgotamento profissional; Saúde do trabalhador; Docentes.

  4. Protozooplankton characterization of two contrasting sites in a tropical coastal ecosystem (Guanabara Bay, RJ

    Directory of Open Access Journals (Sweden)

    Eli Ana Traversim Gomes

    2007-03-01

    Full Text Available Much time and resources have been invested in understanding plankton dynamics in Guanabara Bay (Brazil, but no attention has been devoted to the protozooplankton. To fulfill this lacuna, abundance and composition of protozooplankton were investigated from January to December - 2000 in fortnightly surface water samplings at two distinct water quality sites (Urca - closer to the bay entrance, more saline and cleaner waters; Ramos - inner reaches, hypereutrophic waters. The density at Urca (10³ - 10(5 cell.l-1 was one to three orders of magnitude lower than at Ramos (10(4 - 10(5 cell.l-1. A seasonal trend for nanoplankton and protozooplankton was more evident at Urca, but both sites had lower densities during the colder period. Small heterotrophic dinoflagellates (20-30 mm were dominant in over 50% of the samples. The protozooplankton abundance and composition reflected the distinct trophic conditions states found at the bay. During the wet-warm season, non-oligotrich ciliates were representative of Ramos site with Gymnodiniaceae dinoflagellates, while tintinnids and heterotrophic dinoflagellates were predominantly found at Urca mainly during the dry-cold season. This first descriptive study towards the understanding of the intricate relationships among the microbial food web components reveals that protozooplankton can be a good indicator of water quality conditions at the bay.Muito tem sido investido para entender a dinâmica do plâncton da Baía de Guanabara (Brasil, estuário tropical com sérios problemas ambientais, mas pouco se sabe sobre o protozooplâncton. Preenchendo esta lacuna, a composição e abundância do protozooplâncton (ciliados, flagelados heterotróficos foram investigadas em 2000, por meio de amostragens subsuperficiais, quinzenais, em dois locais com qualidade distinta de água (Urca - entrada da baía, águas mais salinas e limpas; Ramos - região mais interna, águas hipereutróficas e menos salinas. A densidade na Urca

  5. Tourism, nature and culture: disputes for "heritage sites"in "participative debates" in Ilha Grande, State of Rio de Janeiro (RJ), Brazil

    National Research Council Canada - National Science Library

    Helena Catão Henriques Ferreira

    2013-01-01

    .... This work aims at reflecting upon the relationship between tourism on Ilha Grande and the ideas of heritage discussed in these forums. It is based on an ethnographic work which was researched and developed between 2007 and 2010, involving the participation and direct observation of the meetings held during the forums as well as interviews with social parties involved.

  6. Environmental factors affecting the distribution of land snails in the Atlantic Rain Forest of Ilha Grande, Angra dos Reis, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    GKM Nunes

    Full Text Available The distribution and abundance of terrestrial molluscs are affected by environmental factors, but data are lacking for Brazilian land snails. The aim of this study was to understand the relationship between measured environmental factors and the land-snail species composition of two hillsides covered with Atlantic Rain Forest on Ilha Grande. On each hillside, five plots located at 100 m intervals between 100 to 500 m asl were chosen. Each plot was sampled by carrying out timed searches and collecting and sorting litter samples from ten quadrats of 25 × 75 cm. A range of environmental data was measured for each of the quadrats in a plot. A Cluster Analysis was carried out for the richness and abundance data. The environmental variables were analysed using a Pearson Correlation Matrix and Discriminant Analysis. Our results show that the two mountains are similar in species richness, but species composition and abundance are different, probably reflecting observed differences in environmental conditions. The environmental factors associated with compositional variation between the two mountains were: atmospheric temperature, soil temperature, litter depth, and relative air humidity. Distinct luminosity and canopy closure conditions were related to the composition of the land-snail community of one hillside.

  7. Negative serosurvey of Toxoplasma gondii antibodies in Golden-headed Lion Tamarin (Leontopithecus chrysomelas from Niterói/RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Camila Vieira Molina

    Full Text Available Abstract New World Nonhuman Primates are highly susceptible to clinical toxoplasmosis. Serum samples from 126 recently captured Leontopithecus chrysomelas, from an exotic and invasive population, were tested for Toxoplasma gondii antibodies by the modified agglutination test (MAT, cut-off 1:25; all were seronegative. The MAT is highly specific and is not species-specific. This is the first report of T. gondii survey in this tamarin in the wild. This result is consistent with prior reports that showed the high susceptibility of the species to infection by T. gondii usually with high mortality rates.

  8. Diagnosis of rubella infection by detecting specific immunoglobulin M antibodies in saliva samples: a clinic-based study in Niterói, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Oliveira Solange Artimos de

    2000-01-01

    Full Text Available This study was designed to investigate whether saliva could be a feasible alternative to serum for the diagnosis of recent rubella infection in a clinic setting. Forty-five paired blood and saliva samples collected 1 to 29 days after onset of illness were tested for specific immunoglobulin (Ig M by antibody-capture radioimmunoassay (MACRIA. Rubella IgM was detected in all serum samples and in 38 (84.4% saliva specimens. Forty-six serum and saliva samples from other patients with rash diseases were tested by MACRIA for control purposes and two saliva specimens were reactive. The saliva test had specificity of 96%. These results indicate that salivary IgM detection may be a convenient non-invasive alternative to serum for investigation of recent rubella cases, especially for disease surveillance and control programmes.

  9. Blood parasites, total plasma protein and packed cell volume of small wild mammals trapped in three mountain ranges of the Atlantic Forest in Southeastern Brazil.

    Science.gov (United States)

    Silva, M A M L; Ronconi, A; Cordeiro, N; Bossi, D E P; Bergallo, H G; Costa, M C C; Balieiro, J C C; Varzim, F L S B

    2007-08-01

    A study of blood parasites in small wild non-flying mammals was undertaken in three areas of the Atlantic Forest in Southeastern Brazil: Serra de Itatiaia, RJ, Serra da Bocaina, SP and Serra da Fartura, SP, from June 1999 to May 2001. A total of 450 animals (15 species) were captured in traps and it was observed in 15.5% of the blood smears the presence of Haemobartonella sp. and Babesia sp. in red blood cells. There was no statistically significant difference between parasited and non-parasited specimens regarding total plasma protein, packed cell volume and body weight, which strongly suggests that these specimens might be parasite reservoirs.

  10. Brazil The Duck Lagoon

    Science.gov (United States)

    2002-01-01

    This Multi-angle Imaging SpectroRadiometer (MISR) image of Brazil covers an area of about 298 kilometers x 358 kilometers, and was captured by the instrument's vertical-viewing (nadir) camera on December 27, 2001. The 'Lagoa dos Patos', in the Brazilian state of Rio Grande do Sul, translates to 'the Duck Lagoon'. It was named by 16th century Jesuit settlers, who asked the King of Spain to grant them title to the lagoon so that they could breed ducks. The King consented, but revoked his edict when he discovered that the 'duck-pond' (measuring about 14,000 square kilometers) was one of the largest lagoonal systems in the world. Note the sediment plume emanating from the southern end of the lagoon. Sailors in the 16th century imagined this outlet to be the mouth of a large river. Early Portuguese explorers mistook the entrance to the lagoon for the mouth of a great river and called it the Rio Grande. A series of wave-like points and curls form 'cusps' on the inner shores of the lagoon. The lagoon's characteristics change with short-term tide-induced cyclic perturbations, and with longer term large scale meteorological conditions. The distinctive wavelike 'cusps' along the inner shores result from the circulation, erosion and accumulation of sediments driven by wind and tidal action. The El Nino Southern Oscillation (ENSO) circulation affects precipitation amount and continental runoff, thereby changing the contents of the lagoon waters. High rainfall and increased freshwater discharge during El Nino events correspond with elevated dissolved nutrient concentrations and increased phytoplankton growth. La Nina years are dry and the associated low rainfall reduces the freshwater recharge to the lagoon, causing an increase in salinity. Occasional blooms of toxic cyanobacteria (Microcystis aeruginosa), have been registered in the lagoon when nutrient concentrations are elevated. A number of reeds and grasses are important to the lagoon estuary, including widgeon grass

  11. Nota sobre a variação sazonal da circulação geostrófica na borda da plataforma continental: Cabo de São Tomé (RJ e a Baía de Guanabara (RJ Seasonal variation of geostrophic circulation on the continental slope: Cape of São Tomé (RJ and Guanabara Bay (RJ

    Directory of Open Access Journals (Sweden)

    Ademildes Maria Paviglione

    1985-01-01

    Full Text Available Cinco observações oceanográficas espaciais quase sinóticas, realizadas de janeiro de 1970 a fevereiro de 1971, na região entre o Cabo de São Tomé e a Baía de Guanabara, são usadas para descrever a circulação sazonal e as condições de fluxo da Corrente do Brasil próximo à plataforma continental. As velocidades relativas foram calculadas sobre superfícies isanostéricas, de acordo com o método sugerido por Montgomery (1937. A precisão do método foi analisada, com base na propagação dos erros instrumentais das medidas da temperatura, da salinidade e da profundidade sobre o volume específico e a aceleração potencial, obtendo-se uma precisão de cerca de ± 3,0 cm s-1, para a velocidade relativa, e um máximo de ± 2,5 Sv, para o transporte de volume através da secção transversal. As correntes geostróficas de superfície, calculadas com referência à superfície isanostérica de 100 cl ton-1, sao geralmente mais intensas através das secções a leste de Cabo Frio, onde elas atingem valores máximos (~90 cm s-1 na borda da plataforma continental durante o verão, e valores acima de 86 cm s-1 ocorrem no inverno, mais além, a distâncias da costa maiores do que 140 km. Os diagramas T-S mostram os detalhes da distribuição do fluxo nas classes características e o fato de que 50% do transporte total corresponde à Massa de Água Tropical, próxima da superfície isanostérica de 220 cl ton-1. As variações do transporte total na coluna de água, desde a superfície até a superfície isanostérica de referência, foram analisadas para estimar o transporte por unidade de largura.Five-nearly-synoptic spatial oceanographic observations, taken from January, 1970 to February, 1971, in the region between Cape of São Tomé and Guanabara Bay, are used to describe the seasonal circulation and flow conditions of the Brazil Current, close to the continental slope. The relative geostrophic velocities were calculated over isanosteric

  12. Center for Contaminated Sediments

    Data.gov (United States)

    Federal Laboratory Consortium — The U.S. Army Corps of Engineers Center for Contaminated Sediments serves as a clearinghouse for technology and expertise concerned with contaminated sediments. The...

  13. Superfund: Contaminated Sediments

    Science.gov (United States)

    Contaminated sediments are a significant environmental problem and contribute to the over 3,200 fish consumption advisories nationwide. The Superfund program cleans up sediment sites that present an unacceptable risk to human health or the environment.

  14. Indicators: Sediment Enzymes

    Science.gov (United States)

    Sediment enzymes are proteins that are produced by microorganisms living in the sediment or soil. They are indicators of key ecosystem processes and can help determine which nutrients are affecting the biological community of a waterbody.

  15. Ocean Sediment Thickness Contours

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Ocean sediment thickness contours in 200 meter intervals for water depths ranging from 0 - 18,000 meters. These contours were derived from a global sediment...

  16. National Geochemical Database: Sediment

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Geochemical analysis of sediment samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are of stream sediment in...

  17. Efeito da variabilidade da precipitação pluvial e do uso e manejo do solo sobre o escoamento superficial e o aporte de sedimento de uma bacia hidrográfica do Distrito Federal Effect of rainfall variability and land use on runoff and sediment in the Pipiripau river basin, in the Distrito Federal, Brazil

    Directory of Open Access Journals (Sweden)

    Henrique Marinho Leite Chaves

    2008-02-01

    Full Text Available O objetivo do presente trabalho foi avaliar o efeito da variabilidade da precipitação sobre o escoamento direto e sobre o aporte de sedimento na bacia do rio Pipiripau (A = 235 km², no Distrito Federal. Cinco anos típicos da série de precipitação foram selecionados: o ano mais úmido, o ano mais seco, o ano médio e dois anos que representaram os desvios-padrão da série (médio-seco e médio-úmido. Depois de o modelo ser calibrado com dados diários de chuva e vazão da bacia, simulações foram realizadas para cada evento chuvoso de cada um dos cinco anos selecionados da série, e o escoamento direto e o aporte de sedimento da bacia foram calculados com a MUSLE em três diferentes cenários de uso e manejo do solo: o cenário atual, onde predomina o preparo convencional do solo (PC nas áreas de agricultura da bacia; o passado recente, em que predominava o Cerrado nativo (CER; e o cenário de plantio direto (PD, nas áreas de agricultura da bacia. Apesar de as vazões médias anuais observadas terem apresentado relação linear com os volumes de precipitação pluvial anual, em todos os cenários, o escoamento direto e o aporte de sedimento apresentaram aumento exponencial com o aumento da precipitação pluvial anual, sendo esse mais pronunciado na condição de preparo convencional (PC do que nos outros cenários estudados (CER e PD. O aumento observado pode ser explicado pela não-linearidade do modelo MUSLE ao volume de precipitação e ao volume de escoamento.The objective of this study was to evaluate the effect of the rainfall variability on the runoff and sediment amount in the Pipiripau river basin (A = 235 km², in the Distrito Federal, Brazil. To represent the climatic variability of the historic precipitation series, 5 years were selected: the moistest, the driest, an average, and 2 years representing the standard deviations from the series (half-wet and half-dry. After the calibration of the model with basin rainfall and

  18. ESR (Erythrocyte Sedimentation Rate) Test

    Science.gov (United States)

    ... products and services. Advertising & Sponsorship: Policy | Opportunities Erythrocyte Sedimentation Rate (ESR) Share this page: Was this page helpful? Also known as: Sed Rate; Sedimentation Rate; Westergren Sedimentation Rate Formal name: Erythrocyte Sedimentation ...

  19. Critérios de estabilidade atmosférica para a região da Central Nuclear Almirante Álvaro Alberto, Angra dos Reis - RJ Criteria of atmospheric stability for the region around the nuclear power plant Almirante Álvaro Alberto, Angra dos Reis - RJ

    Directory of Open Access Journals (Sweden)

    José Francisco De Oliveira Júnior

    2010-06-01

    Full Text Available Realizaram-se avaliações climatológicas, sazonais e diárias, da estabilidade atmosférica na região da Central Nuclear Almirante Álvaro Alberto (CNAAA, Angra dos Reis - RJ. A climatológica foi baseada no critério de Pasquill-Gifford (P-G para um período de 26 anos (1980-2006 e a sazonal-diária pelos números de Richardson Global (RiB e de Froude (Fr - estudo de caso (2002-05. O Fr foi usado na caracterização do escoamento da região. O critério de P-G mostrou que as classes predominantes foram D, E e F (no período noturno e diurno. Avaliaram-se as classes predominantes com a direção e velocidade do vento, os setores mais freqüentes foram S, SSW, SSE no período diurno e N, NNE, NNW e E no noturno. Quanto à velocidade verificou-se que a classe D foi mais veloz, e as classes E e F menos velozes, em qualquer período. As maiores velocidades foram coincidentes com a brisa marítima. Baseado no RiB, a condição estaticamente estável prevaleceu em comparação às demais, sendo de 79%, seguida da instável (17% e neutra (4%. O Fr indicou que o escoamento na CNAAA foi caracterizado por regime de vento fraco, com forte estabilidade e ar estagnado. A maior parte das ocorrências (63% foi para Fr inferior a 0,1, seguida de poucas ocorrências nas categorias Fr igual a 1,0 (8% e superior a 1,7 (12%. Os critérios utilizados na caracterização da estabilidade na região e na análise do regime de escoamento indicaram a baixa capacidade da atmosfera para a dispersão de poluentes, devido à predominância da condição estável e do regime de bloqueio.The atmospheric stability over the nuclear power plant Almirante Álvaro Alberto (CNAAA, Angra dos Reis - RJ, Brazil, was analyzed at climatological, seasonal, and daily scales. The climatologic analysis was based on the Pasquill-Gifford (P-G for a long-term series of 26 years (1980 - 2006, while the seasonal/daily was performed using the Global Richardson number, RiB, and the Froude number

  20. Electrodialytic remediation of sediments

    DEFF Research Database (Denmark)

    Jensen, Pernille Erland

    often hinders this usage. Hence, for both types of sediments, expensive deposition at hazardous waste landfills is required. Electrodialysis is presently being developed as an alternative method for treatment of such contaminated sediments. Heavy metals are removed by treating the sediments...

  1. ACESSIBILIDADE EM BIBLIOTECA ESCOLAR: estudo de caso do Instituto Federal do Rio de Janeiro - Campus Paracambi–RJ

    Directory of Open Access Journals (Sweden)

    Cládice Nóbile Diniz

    2017-11-01

    Full Text Available Estuda a acessibilidade da biblioteca escolar do Instituto Federal do Rio de Janeiro Campus Paracambi – RJ, entre janeiro e março de 2017, da ótica da Lei n° 13.146/2015 e da norma técnica brasileira NBR 9050:2015, quanto a aspectos arquitetônicos, urbanísticos e instrumentais. Objetiva investigar as condições de locomoção de usuários com deficiência em prol de seus acessos informacionais. A metodologia, de estudo de caso descritivo, opera com nove indicadores de ocorrência de barreiras desenvolvidos em relação ao entorno da biblioteca investigada, à sua entrada e a seus espaços internos, pisos, corredores, sanitários, balcões, mesas de consulta dos usuários e estantes. Apoia-se em pesquisa documental, bibliográfica e de campo. O tratamento dos dados foi qualitativo. Resultou identificar a existência de barreiras e constatou que a solução do problema é alvo de esforços da administração da instituição, que busca resolvê-lo com equipamentos e obras, como a instalação de elevadores. Conclui que o método utilizado de estudo da acessibilidade por indicadores pode ser uma ferramenta de apoio à decisão útil a gestores de bibliotecas por permitir estabelecer critérios de prioridades em processos de mudanças em prol da acessibilidade.

  2. Diagnosis of the quality of water supplied to the locality of Santa Cruz, Campos dos Goytacazes, RJ

    Directory of Open Access Journals (Sweden)

    Dayana R. C. Vilaça

    2012-04-01

    Full Text Available The basic sanitation comprises several services that are essential to the maintenance of people's health and well-being. The populations that have an appropriate water supply, sewage collection and treatment, proper garbage disposal, among other services, are protected from diseases and have access to a minimum comfort to live in a safe way. In spite of the importance of these services, to the extent to be characterized as “basic”, several populations, national or worldwide, suffer for the lack or the complete privation of sanitation, live without access to quality water, their waste is thrown under open air and their garbage is disposed in inappropriate sites, what causes health and environmental impacts. This work is being accomplished in a community called Santa Cruz, located in Campos dos Goytacazes, RJ, and aims to carry out a survey about the local sanitary reality, especially about the quality of the water supplied to the population. 100 inhabitants of that community were interviewed and answered a questionnaire. Among the results, 22% of the interviewees consume the water that comes to their homes without any type of treatment, 47% consider the supply water as being of poor quality and 7% don't own home water tanks. After the interviews, bacteriological and physicochemical water analyses were performed in fifteen samples collected in the community. The test results indicated that the collected water was out of the drinking water standards, and therefore, inappropriate for human consumption.

  3. Memórias e narrativas de professoras "normalistas" do Instituto de Educação/RJ

    Directory of Open Access Journals (Sweden)

    Vera Maria Ramos de Vasconcellos

    Full Text Available O trabalho analisa o pensamento produzido na vida cotidiana urbana e na formação de normalistas do Instituto de Educação de 1948. É inspirado na leitura do livro de Zilá Simas Enéas, ex-aluna daquela instituição de ensino: Era uma vez no Instituto de Educação (editado em 1997, pela CNEL/RJ. De modo particular, neste trabalho são analisadas as memórias e narrativas daquelas meninas normalistas hoje senhoras com mais de 80 anos , suas relações com a educação, a escola, a infância e a cidade do Rio de Janeiro, antiga capital do país (Distrito Federal, depois Estado da Guanabara e, mais tarde, município do Rio de Janeiro. As interferências produzidas por essas imagens/memórias/concepções com outras configurações discursivas da sociedade, ao longo da história, são questões que nortearam a pesquisa. A análise destaca a disseminação de valores educacionais, éticos e estéticos em um tempo em que se expressavam projetos diversos, orientados para o estabelecimento de uma "ordem moderna" no país, na geração feminina do "Estado novo". Com este trabalho, buscamos compreender o que é/foi ser professora.

  4. Desafios do desenvolvimento em Miracema (RJ: uma abordagem territorial sustentável de saúde e ambiente

    Directory of Open Access Journals (Sweden)

    Paulo José de Mendonça Ribeiro

    2013-06-01

    Full Text Available O objetivo deste trabalho foi identificar e caracterizar um modelo de gestão do marketing como estratégia para promoção do município saudável e sustentável em Miracema (RJ. A estrutura da pesquisa deu-se, primeiro, pela coleta de dados primários, com a realização de entrevistas com gestores municipais para conhecer o Sistema de Gestão Municipal e construir mapas participativos para diagnóstico dos problemas e conflitos. Segundo, uma pesquisa de abordagem qualitativa, interpretando a percepção junto à população por meio de questionário estruturado da problemática no município. Na investigação de ferramentas e instrumentos para resposta à problemática no município de Miracema utilizou-se como referencial a matriz Pressão-Estado-Impacto-Resposta (PEIR. Com base no conhecimento produzido, elaborou-se a proposta de gestão do marketing no município baseada nos indicadores de resposta diagnosticados na esfera municipal. Miracema apresenta potencial para desenvolvimento nos setores primário e secundário. O agronegócio deve ser desenvolvido no modelo sustentável, em conformidade com políticas públicas capazes de promover a continuidade de investimentos. O mesmo aplica-se ao aproveitamento da matéria prima na indústria. Logo, o Zoneamento Econômico Ecológico do município contemplando o ambiente induz a ferramenta indispensável de sua viabilidade.

  5. DIOCTOFIMOSE EM UM CÃO PROVENIENTE DO MUNICÍPIO DE VALENÇA, RJ: RELATO DE CASO

    Directory of Open Access Journals (Sweden)

    Laís Zacaron MARQUES

    2016-12-01

    Full Text Available Dioctophyma renale é o maior nematóide conhecido. Seu parasitismo tem sido descrito em várias espécies animais e no homem. Este helminto localiza-se preponderantemente no rim direito ou livre na cavidade abdominal de seus hospedeiros. Sinais clínicos como abatimento, inapetência e emagrecimento podem estar associados à dioctofimose, apesar do curso da parasitose ser muitas vezes assintomático nos animais e pessoas infectadas. O único tratamento eficaz é a remoção cirúrgica do parasito e, em alguns casos, do rim afetado. O presente trabalho teve como objetivo relatar um caso de parasitismo por Dioctophyma renale em um cão no município de Valença/RJ. O animal foi resgatado por apresentar um tumor na pata e também hérnia perianal, mas ao caminho da policlínica veterinária apresentou também uma urina de odor fétido, que através da urinálise observou-se presença de ovos compatíveis com os de Dioctophyma renale.Dado o diagnóstico e localização do parasito, o animal foi encaminhado para a Policlínica de Pequenos Animais, da Faculdade de Medicina Veterinária de Valença, onde optou-se pela nefrectomia do rim afetado. 

  6. Paleoenvironmental implications of early diagenetic siderites of the Paraíba do Sul Deltaic Complex, eastern Brazil

    Science.gov (United States)

    Rodrigues, Amanda Goulart; De Ros, Luiz Fernando; Neumann, Reiner; Borghi, Leonardo

    2015-06-01

    Abundant early diagenetic siderites occur as spherulites and rhombohedral microcrystalline and macrocrystalline crystals in the cores of the 2-MU-1-RJ well, drilled in the Paraíba do Sul Deltaic Complex, Rio de Janeiro (Brazil). The host sediments of the siderites are siliciclastic, hybrid, and carbonate deposits. Intense pedogenetic processes affected the siliciclastic sediments immediately after deposition, comprising clay illuviation, plants bioturbation, feldspar dissolution, and iron oxide/hydroxide precipitation. Siderite and pyrite are the main diagenetic constituents. The other diagenetic products are kaolinite, smectite, argillaceous and carbonate pseudomatrix, quartz overgrowths, diagenetic titanium minerals, jarosite, and iron oxides/hydroxides. Early diagenetic siderites were separated into four groups based on their elemental and stable isotopic composition, as well as on their paragenetic relationships with the other constituents and with the host sediments. Spherulitic to macrocrystalline siderites from group 1 are almost pure (average: 94.7 mol% FeCO3; 1.2 mol% MgCO3; 2.3 mol% CaCO3; 1.8 mol% MnCO3) and precipitated from meteoric porewaters in continental siliciclastic rocks under suboxic conditions (δ18Ovpdb values range in - 10.28 to - 5.57‰ and the δ13Cvpdb values in - 12.68 to - 4.33‰). Microcrystalline rhombohedral siderites from group 2 have zonation due to substantial Ca and Mg substitution (core average: 78.5 mol% FeCO3; 4.2 mol% MgCO3; 15.7 mol% CaCO3; 1.6 mol% MnCO3; edge average: 74.0 mol% FeCO3; 9.2 mol% MgCO3; 15.6 mol% CaCO3; 1.1 mol% MnCO3), and δ13Cvpdb and δ18Ovpdb values of + 0.17‰ and - 1.96‰, precipitated from marine porewaters in packstones/wackestones under methanogenic conditions. The group 3 is represented by irregular spherulitic siderites with moderate Ca and Mg substitutions (average: 80.2 mol% FeCO3; 7.9 mol% MgCO3; 11.3 mol% CaCO3; 0.6 mol% MnCO3), with δ18Ovpdb values ranging from - 5.96 to - 7.61‰ and

  7. Arborização de vias púbicas em Nova Iguaçu, RJ: o caso dos bairros Rancho Novo e Centro Tree planting on public roads in Nova Iguaçu, RJ: the case of Novo Rancho and Downtown districts

    Directory of Open Access Journals (Sweden)

    Rodrigo Tavares da Rocha

    2004-08-01

    Full Text Available Os objetivos deste trabalho foram quantificar e qualificar a arborização de ruas dos Bairros Rancho Novo e Centro, na cidade de Nova Iguaçu, RJ. Através de inventário total, foram encontrados 560 indivíduos pertencentes a 46 espécies no Bairro Rancho Novo e, no Bairro Centro, 1.374 e 59, respectivamente. Em ambos os bairros, cerca de 91% das plantas pertenciam às 20 espécies mais freqüentes, sendo Ficus benjamina e Cássia siamea as predominantes em Rancho Novo (21,6% e Centro (19,1%, respectivamente. O Bairro Rancho Novo apresentou 18% de suas vias públicas arborizadas e o Bairro Centro, 13,5%. Cerca de 95% das espécies foram enquadradas como de pequeno e médio portes. As maiores médias de altura foram observadas em plantas de Cássia siamea, em Rancho Novo e amendoeira no Centro. As espécies plantadas sob rede aérea representaram 40% da população arbórea, sendo 45% desta com conflitos evidentes. No Bairro Centro, 62% das árvores necessitavam de poda, enquanto em Rancho Novo a poda é recomendada em 50% das plantas. Elevada discrepância foi constatada nas distâncias médias entre árvores, com valores médios de 56 m no Bairro Rancho Novo e 74 m no Bairro Centro. Recomenda-se a substituição gradativa de Cássia siamea, amendoeira, "flamboyant" e sombreiro por outras espécies mais adequadas à arborização urbana.The objectives of this work were to quantify and qualify the urban trees of Rancho Novo District and Downtown Area of Nova Iguaçu City, State of Rio de Janeiro, Brazil. Through the total inventory, 560 individuals distributed in 46 species were found in Rancho Novo District, in contrast to 1,374 individuals and 59 species in Downtown Area. In both areas, about 91% of the plants are among the 20 most frequent species, with Ficus benjamina and Cassia siamea predominating in Rancho Novo (21,6% and Downtown (19,1 %, respectively. Rancho Novo District presented 18% of arboured public areas against 13,5% of Downtown

  8. Establishment of criteria for classification of area remediation measures contaminated after an eventual radiation accident in Angra dos Reis, RJ, nuclear power plant; Estabelecimento de criterios para a classificacao de medidas de remediacao de areas contaminadas apos um eventual acidente nuclear na usina de Angra dos Reis (RJ)

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Diogo Neves Gomes da

    2016-07-01

    When a radiological or nuclear accident that leads to the release of radioactive material to the environment occurs, it is important to implement protective and remediation measures in order to reduce human exposure to radionuclides. Therefore, it is necessary that the procedures to be chosen by the affected country authorities are the most efficient ones, which can only be defined based on previously established criteria. In Brazil, since the radiological accident in Goiania, in 1987, the development of tools to support decision-making in emergencies of this nature was started. The main objective of this work was to establish an acting basis for contaminated areas, in order to protect the individuals of public in case of any accident related to Almirante Alvaro Alberto nuclear power plant, in the municipality of Angra dos Reis (RJ), which leads to contamination to the environment and the consequent exposure of local population or from more distant regions to ionizing radiation. Initially, the high-risk areas near the location of the nuclear power plant were defined. Typical urban environments found in the main cities of these municipalities were surveyed, including homes, streets and recreation areas. The main characteristics of the study area were evaluated using images from Google Earth® and web pages of the municipalities. After the types of areas to be simulated were selected, these were quantified in terms of the number of residents, the size of the streets, and the number of trees, among others, per unit area. Considering the different housing characteristics for the selected municipalities, six main standard scenarios were developed for urban areas, including homes with different shielding, buildings and parks. The simulation of the procedures for each scenario was made with SIEM model, developed by the Institute of Radiation Protection and Dosimetry (IRD/CNEN), formed by the integration of various models including CORAL, focusing on agricultural areas

  9. Patterns and characteristics of university-industry relationships: evidences from a college of engineering in Brazil

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Lopes Balla

    2015-09-01

    Full Text Available The university-industry interactions have been perceived by academics and governments as one of the key drivers for social and economic development of nations. In Brazil, these interactions are still a recent phenomenon, with no conclusive results on its effectiveness and with no clear guidelines on how to tackle the main problems faced by the professionals, researchers and institutions involved on such interactions. In order to provide an accurate diagnosis of the characteristics, challenges and peculiarities of these phenomena, the present study investigates the university-industry relations in the School of Engineering of Universidade Federal Fluminense (UFF, located in the municipality of Niterói/RJ. In order to contribute to the analysis of the problem, interviews were conducted with professors and researchers affiliated with the School. The results shows, from the perspective of the respondents, the main motivations of the parties involved in these relationships, as well as the main limitations and difficulties in its establishment.

  10. Leishmania (infantum chagasi in canine urinary sediment

    Directory of Open Access Journals (Sweden)

    Ivete Lopes de Mendonça

    Full Text Available Canine visceral leishmaniasis (CVL is difficult to diagnosis, mainly due to the presence of asymptomatic animals, the diversity of clinical symptoms and the difficulty in obtaining diagnostic evidence of high sensitivity and specificity. The purpose of this study was to diagnose CVL in urinary sediment of 70 dogs of different breeds, sexes and ages from the veterinary hospital of the Federal University of Piauí and Zoonosis Control Center of Teresina, Brazil. The serological tests were TR DPP® for CVL and enzyme-linked immunosorbent assay (ELISA for CVL, parasitological exams of bone marrow and lymph nodes and urine sediment cultures. Leishmania was detected in the bone marrow and/or lymph node of 61.0% of the animals (43/70, and urine sediment culture was positive in 9.30% (4/43 of these animals. In the serological exams, 70.0% (49/70 were reactive using the DPP and 78.2% (55/70 were reactive using ELISA. The goal of this study was to diagnose the presence of L. (infantum chagasi in a culture of urinary sediment.

  11. A new Magnetic Observatory in Pantanal - Brazil

    Science.gov (United States)

    Siqueira, F.; Pinheiro, K.; Linthe, H.

    2013-05-01

    The aim of a Magnetic Observatory is to register the variations of the Earth's magnetic field in a long temporal scale. Using this data it is possible to study field variations of both external and internal origins. The external variations concern interactions between the magnetosphere and the solar wind, in general are measured in a short time scale. The internal field generated by convection of a high electrical conductivity fluid in the external core by a mechanism known as the geodynamo. Usually the internal field time variations are longer than in the external field and are called secular variations. Measurements carried out over the last century suggest that field intensity is decreasing rapidly. The decreasing of the field's intensity is not the same around the globe, especially at the SAMA (South Atlantic Magnetic Anomaly) regions, where this reduction is occurring faster. The global distribution of magnetic observatories is uneven, with few observatories in South America. In Brazil, there are three magnetic observatories, but only Vassouras Observatory (VSS- RJ) is part of the INTERMAGNET network. The National Observatory has plans to install seven new observatories in Brazil. Pantanal was the chosen location for installing the first observatory because of its privileged location, close to the SAMA region, and its data can contribute to more information about its origin. We followed the procedures suggested by the IAGA to build this observatory. The first step is to perform a magnetic survey in order to avoid strong magnetic gradients in the location where the absolute and variometers houses will be installed. The next step, the construction of the observatory, includes the selection of special non-magnetic material for the variometer and absolute houses. All materials used were previously tested using a proton magnetometer GSM-19. After construction of the whole infrastructure, the equipment was installed. This Project is a cooperation between Brazilian

  12. Constraints on the sedimentation history of San Francisco Bay from 14C and 10Be

    Science.gov (United States)

    VanGeen, A.; Valette-Silver, N. J.; Luoma, S.N.; Fuller, C.C.; Baskaran, M.; Tera, F.; Klein, J.

    1999-01-01

    Industrialization and urbanization around San Francisco Bay as well as mining and agriculture in the watersheds of the Sacramento and San Joaquin rivers have profoundly modified sedimentation patterns throughout the estuary. We provide some constraints on the onset of these erosional disturbances with 10Be data for three sediment cores: two from Richardson Bay, a small embayment near the mouth of San Francisco Bay, and one from San Pablo Bay, mid-way between the river delta and the mouth. Comparison of pre-disturbance sediment accumulation determined from three 14C-dated mollusk shells in one Richardson Bay core with more recent conditions determined from the distribution of 210Pb and 234Th [Fuller, C.C., van Geen, A., Baskaran, M, Anima, R.J., 1999. Sediment chronology in San Francisco Bay, California, defined by 210Pb, 234Th, 239,240Pu.] shows that the accumulation rate increased by an order of magnitude at this particular site. All three cores from San Francisco Bay show subsurface maxima in 10Be concentrations ranging in magnitude from 170 to 520 x 106 atoms/g. The transient nature of the increased 10Be input suggests that deforestation and agricultural develop- ment caused basin-wide erosion of surface soils enriched in 10Be. probably before the turn of the century.

  13. The applicability of the sediment deposition geochronology with {sup 2'}1{sup '}0{sup P}B as a tool in the sediment accumulation from the Taquari River, Pantanal, MS, Central region, Brazil; Aplicabilidade da geocronologia da deposicao de sedimento com {sup 2{sup }}1{sup {sup }}0{sup P}B como ferramenta na avaliacao do assoreamento do Rio Taquari, Pantanal, MS

    Energy Technology Data Exchange (ETDEWEB)

    Godoy, J.M. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil); Padovani, C.R.; Vieira, L.M. [EMBRAPA, Corumba, MS (Brazil). Centro de Pesquisa Agropecuaria do Pantanal; Pereira, J.C.A. [Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil). Dept. de Quimica

    1998-07-01

    This work presents {sup 210} Pb geochronology of five bottom sediment cores from flood plain lakes of middle Taquari River, Pantanal, MS. In two cores of a same lake, an increase of the sediment deposition rate were observed, reflecting an increasing of the sediment input to the Pantanal. The main causes suggested for this increasing are climatic change, and the development of agriculture and cattle-raising in the watershed highlands, for the last 25 years. The results pointed too for the importance of a additional sample in the superior region of the middle Taquari River. (author)

  14. Environmental economic appraisal as a tool for water resources conservation: a proposal for assisting management of the Environmental Protection Area in Macaé de Cima, RJ

    Directory of Open Access Journals (Sweden)

    Francisco Formagini Brant

    2011-12-01

    Full Text Available This article discusses the importance of the use of evaluation methods in the management of Environmental Protection Areas (APAs, in order to provide the necessary tools for the management of APA - Macaé de Cima/RJ, still under development. Thus, the paper presents some concepts related to the study of natural resource economics, emphasizing ways of evaluating tropical ecosystems. The article proposes that water resources should be analyzed by using contextualization of environmental appraisal methods that show the importance of water resources for local society and associated ecosystems.

  15. Projeto de vida e trabalho dos jovens no contexto das novas ruralidades : o caso dos estudantes da EFA de Tinguá/RJ

    OpenAIRE

    Oliveira, Sirle Brum de

    2006-01-01

    Esse trabalho buscou analisar, ou compreender, o lugar que a Escola Família Agrícola (EFA) ocupa no processo de formação dos jovens estudantes desta escola, a partir de seus projetos e de suas possíveis expectativas de vida e trabalho, no contexto das novas ruralidades, no distrito de Tinguá, que apresenta características rurbanas, no município de Nova Iguaçu, RJ. Para realizar tal análise tomamos diferentes estudos acadêmicos sobre ruralidades e juventude, bem como a discussão sobre projet...

  16. Study on the historical distribution of metals in aquatic sediments

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, Wagner Jose; Ishikawa, Dilson Norio; Nicolau, Andressa Clara; Magalhaes, Evandro Domingues; Inoue, Fabiana; Santos Nora, Paulo dos; Funfas, Rodolfo; Barreto, Sonia Regina Giancoli [Departamento de Quimica, Centro de Ciencias Exatas, Universidade Estadual de Londrina, Parana (Brazil)

    2010-07-15

    In this study, the historical distribution of metals, phosphorous, and sulfur at four different depths in the sediments of different lakes formed in the course of an urban river (in Londrina, Parana State, Brazil) were determined. The transport of metals along the course of the river was observed mainly for Mn, Cr, and Zn. High concentrations of Pb in the Capivara Bay and Cr in the river were attributed to contamination from a battery plant and a tannery, respectively. The concentrations of heavy metals in the deepest layers of the sediments remain high several years after deposition. (Abstract Copyright [2010], Wiley Periodicals, Inc.)

  17. Subglacial bedforms and conditions associated with the 1991 surge of Skeidarárjökull, Iceland

    NARCIS (Netherlands)

    Waller, R.I.; Dijk, T. van; Knudson, O.

    2008-01-01

    Much previous research at surge-type glaciers has sought to identify features diagnostic of surge-type behaviour. However, in comparatively little work have subglacial landform-sediment characteristics been used to reconstruct changing basal processes and conditions during surge events. Subglacial

  18. Fauna edáfica em área periodicamente inundável na restinga da Marambaia, RJ

    Directory of Open Access Journals (Sweden)

    Cristiane Figueira da Silva

    2013-06-01

    Full Text Available No compartimento serapilheira-solo, a fauna do solo exerce importante papel na disponibilização de nutrientes, uma vez que é responsável pela regulação da comunidade de microrganismos decompositores da matéria orgânica e pela fragmentação desse material. Este trabalho objetivou avaliar a riqueza e abundância da fauna edáfica, bem como sua distribuição vertical, em área de restinga periodicamente inundada na Ilha da Marambaia, RJ, em duas épocas distintas, verão (chuvosa e inverno (seca. Foram coletadas 10 amostras de serapilheira e de solo na profundidade de 0-5 cm, em que foram feitas extrações da fauna por meio de extratores do tipo Berlese-Tüllgren. Observou-se aumento da abundância da fauna edáfica do período seco para o chuvoso, enquanto a riqueza de grupos taxonômicos não foi modificada. Em ambas as épocas, os grupos de maior ocorrência foram Formicidae e Collembola. Quanto à distribuição vertical, verificou-se a preferência dos organismos pelo compartimento serapilheira, no período chuvoso, e pelo solo, no período seco. A microfagia e a saprofagia representaram as principais formas de utilização dos recursos alimentares, seguidos da predação, sugerindo melhor estruturação do habitat no ecossistema. Além disso, a ocorrência de grupos que só são percebidos em ambientes não perturbados indica que o ecossistema de restinga da Ilha da Marambaia, no momento em que foi avaliado, ano de 2002, encontrava-se pouco ou nada degradado e em bom estado de conservação.

  19. ATENÇÃO FARMACEUTICA AOS IDOSOS HIPERTENSOS: UM ESTUDO DE CASO DO MUNICÍPIO DE APERIBÉ, RJ

    Directory of Open Access Journals (Sweden)

    Jessica Christiny MILLER

    2016-06-01

    Full Text Available A hipertensão arterial constitui-se como uma patologia praticamente assintomática, silenciosa e identificável por meio da aferição da pressão arterial, podendo apresentar valores persistentes maiores ou iguais a 140 mmHg para pressão sistólica e 90 mmHg para diastólica. Os idosos são os que mais sofrem com esta doença. Assim, a função do farmacêutico é sempre orientar sobre os medicamentos a serem administrados pelos idosos já que estes possuem pouco esclarecimento e compreensão a respeito das maneiras de sua utilização. Com esta pesquisa, buscou-se verificar como é realizada a atenção farmacêutica aos idosos hipertensos numa farmácia do Município de Aperibé/RJ, bem como a análise do uso indevido de medicamentos pelos idosos, o papel que o profissional desempenha neste processo e as formas possíveis de prevenir o aumento da pressão arterial pela redução dos fatores de risco. Este trabalho possui como metodologia de pesquisa um estudo qualiquantitativo com procedimentos metodológicos pautados na revisão bibliográfica, utilizando como forma de avaliação a aplicação de questionário estruturado. Foram entrevistados 100 idosos com hipertensão arterial: destes, 13% receberam o diagnóstico de hipertensão arterial antes dos 40 anos de idade, 29% foram diagnosticados entre os 41 e 50 e, 58% foram após 50 anos. Constata-se que no município estudado a maioria dos idosos obteve conhecimento da patologia após os 50 anos. 

  20. Pescadores da Praia Grande, Paraty, RJ: aspectos da resiliência em seu sistema socioecológico

    Directory of Open Access Journals (Sweden)

    Fernanda Pereira de Mesquita Nora

    2017-04-01

    Full Text Available Resilience, as a property of social-ecological systems, is related to the ability of such systems to adapt and deal with perturbations. This study examined the characteristics in a community of artisanal fishermen, using some of the resilience indicators (flexibility, capacity to organize and capacity to learn. The flexibility indicator represents the economic dependence on the natural resource; the capacity to organize indicator informs about participation in decision-making and in community organizations; and the capacity to learn indicator refers to the perception of environmental alterations in relation to human activity. Together, these indicators can inform about the adaptive capacity of the community and its relationship with resource management. Semi structured interviews were conducted in the months of January, April, July and August of 2012 in the community of Praia Grande and surroundings (Paraty/RJ (n=22. As to the flexibility indicator, 59.1% of the fishermen interviewed have another source of income, being tourism the main activity among them (36.4%. Most of the fishermen (77.2% use more than one type of fishing technique which may either reduce pressure on the fishing resource or have an opposite effect, if it is the case of the use of more intensive techniques, such as trawling. Regarding the fishermen’s capacity to organize, it was found and discussed the low participation on decision-making regarding fishing, especially because the area of the study is situated in a context of social-environmental conflicts with conservation areas. As for the capacity to learn, the results indicate that the fishermen perceive the human activity as an agent responsible for the perturbations in the natural environment, and they suggest different solutions in face of the decrease of each target species. Through the use of the resilience indicators it was possible to identify the attributes that allow the adaptation of the community to

  1. Temporal analysis of the connectivity and potential transport capacity of sediments in semiarid meso-basin, CE, Brazil. = Análise temporal da conectividade e da capacidade de transporte potencial de sedimentos em meso-bacia semiárida, CE, Brasil.

    Directory of Open Access Journals (Sweden)

    José Wellington Batista Lopes

    2013-08-01

    Full Text Available The transfer of energy and matter between two topographic units comprise the connectivity process. The identification of the connectivity patterns in the catchments allow to represent the linking degree between sediment producing areas and network drainage. The aim of this study was to evaluate spatial and temporal connectivity and estimate the potential capacity of sediment transport on a meso-semiarid Basin. The study area comprises the Representative Madalena Basin (RMB with area 124 km², located at federal state from Ceara, Brazil. The assessing the connectivity was done by using the quantitative index. The determination of peak discharge was by the method NRCS (Natural Resouces Conservation Service and the transport capacity (CT, t ha-1 yr-1 was calculated by the method of Morgan (2001. The results showed that: the connectivity potential index was not linearity, but a possible spatial distribution pattern of alternating between producing and receiving areas. The use and occupation of land is determinant in the spatial variation of peak flows; transportation capacity concerns associated with potential connectivity provides best estimates of erosion in the basin; in both models used, the use and occupation of soil was crucial in the results. = A transferência de energia e matéria entre duas unidades topográficas compreende o processo deconectividade. A identificação dos padrões de conectividade em uma bacia hidrográfica permite representar o grau de ligação entre áreas produtoras de sedimentos e a rede de drenagem. Objetivou-se com esta pesquisa analisar a conectividade espaço-temporal e estimar a capacidade potencial de transporte de sedimentos em uma meso-baciasemiárida. A área foco do estudo compreende a Bacia Representativa de Madalena (BRM com área de 124 km², localizada no Estado do Ceará, Brasil. Foram avaliadas as seguintes variáveis: conectividade, o pico de descarga e a capacidade de transporte de escoamento da

  2. First report of multiple lineages of dengue viruses type 1 in Rio de Janeiro, Brazil.

    Science.gov (United States)

    dos Santos, Flavia B; Nogueira, Fernanda B; Castro, Márcia G; Nunes, Priscila Cg; de Filippis, Ana Maria B; Faria, Nieli Rc; Simões, Jaqueline Bs; Sampaio, Simone A; Santos, Clarice R; Nogueira, Rita Maria R

    2011-08-03

    In Brazil dengue has been a major public health problem since DENV-1 introduction and spread in 1986. After a low or silent co-circulation, DENV-1 re-emerged in 2009 causing a major epidemic in the country in 2010 and 2011. In this study, the phylogeny of DENV-1 strains isolated in RJ after its first introduction in 1986 and after its emergence in 2009 and 2010 was performed in order to document possible evolutionary patterns or introductions in a re-emergent virus. The analysis of the E gene sequences demonstrated that DENV-1 isolated during 2009/2010 still belong to genotype V (Americas/Africa) but grouping in a distinct clade (lineage II) of that represented by earlier DENV-1 (lineage I). However, strains isolated in 2011 grouped together forming another distinct clade (lineage III). The monitoring of DENV is important to observe the spread of potentially virulent strains as well to evaluate its impact over the population during an outbreak. Whether explosive epidemics reported in Brazil caused mainly by DENV-1 was due to lineage replacement, or due the population susceptibility to this serotype which has not circulated for almost a decade or even due to the occurrence of secondary infections in a hyperendemic country, is not clear. This is the first report of multiple lineages of DENV-1 detected in Brazil.

  3. First report of multiple lineages of dengue viruses type 1 in Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Simões Jaqueline BS

    2011-08-01

    Full Text Available Abstract Background In Brazil dengue has been a major public health problem since DENV-1 introduction and spread in 1986. After a low or silent co-circulation, DENV-1 re-emerged in 2009 causing a major epidemic in the country in 2010 and 2011. In this study, the phylogeny of DENV-1 strains isolated in RJ after its first introduction in 1986 and after its emergence in 2009 and 2010 was performed in order to document possible evolutionary patterns or introductions in a re-emergent virus. Findings The analysis of the E gene sequences demonstrated that DENV-1 isolated during 2009/2010 still belong to genotype V (Americas/Africa but grouping in a distinct clade (lineage II of that represented by earlier DENV-1 (lineage I. However, strains isolated in 2011 grouped together forming another distinct clade (lineage III. Conclusions The monitoring of DENV is important to observe the spread of potentially virulent strains as well to evaluate its impact over the population during an outbreak. Whether explosive epidemics reported in Brazil caused mainly by DENV-1 was due to lineage replacement, or due the population susceptibility to this serotype which has not circulated for almost a decade or even due to the occurrence of secondary infections in a hyperendemic country, is not clear. This is the first report of multiple lineages of DENV-1 detected in Brazil.

  4. IDRC in Brazil

    International Development Research Centre (IDRC) Digital Library (Canada)

    biotechnology and nanotechnology could help to develop natural resources in a more sustainable way. □ Reconstruction in Haiti. Funding: $300,700. Duration: 2009–2012. Grantee: Pró-Ensino Sociedade Civil, Brazil. Researchers from Brazil, Argentina, Mexico, and Chile have been supporting their coun- tries' efforts to ...

  5. Sediment Core Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Provides instrumentation and expertise for physical and geoacoustic characterization of marine sediments.DESCRIPTION: The multisensor core logger measures...

  6. Dynamics of Cohesive Sediments

    DEFF Research Database (Denmark)

    Johansen, Claus

    The present thesis considers the transport processes of cohesive sediments. The cohesive sediment used in the laboratory experiments was kaolinite, a clay mineral, in order to be able to reproduce the individual experiments. In the first part of the thesis, the theoretical considerations regarding...... the nature of the cohesive sediment with respect to the transport processes is presented. In addition, the flocculation process and the rheological behaviour of cohesive sediments is outlined. The second part contains the laboratory experiments. The laboratory experiments were conducted with respect...

  7. Sediment supply to beaches

    DEFF Research Database (Denmark)

    Aagaard, Troels

    2014-01-01

    Many beaches have been built by an onshore supply of sand from the shoreface, and future long-term coastal evolution critically depends on cross-shore sediment exchange between the upper and the lower shorefaces. Even so, cross-shore sediment supply remains poorly known in quantitative terms...... and this reduces confidence in predictions of long-term shoreline change. In this paper, field measurements of suspended sediment load and cross-shore transport on the lower shoreface are used to derive a model for sediment supply from the lower to the upper shoreface at large spatial and temporal scales. Data...

  8. "And they told two friends...and so on": RJ Reynolds' viral marketing of Eclipse and its potential to mislead the public.

    Science.gov (United States)

    Anderson, S J; Ling, P M

    2008-08-01

    To explore viral marketing strategies for Eclipse cigarettes used by the RJ Reynolds Company (Winston-Salem, North Carolina, USA). Analysis of previously secret tobacco industry documents and multimedia materials. The failure of RJ Reynolds' (RJR) 1988 "smokeless" cigarette, Premier, was in part due to widespread bad word of mouth about the product's flavour, quality and difficulty of use. In 1994 RJR introduced an updated version of Premier, the ostensibly "reduced risk" Eclipse cigarette. RJR developed viral marketing channels to promote Eclipse using (1) exploratory interviews to motivate consumers to spread the word about Eclipse prior to market release, (2) promotional videos featuring positive feedback from test group participants to portray majority consensus among triers, (3) "Tupperware"-like parties for Eclipse where participants received samples to pass around in their social circles and (4) the Eclipse website's bulletin board as a forum for potential users to discuss the brand in their own words. These strategies targeted the brand's likeliest adopters, recruited informal and credible representatives of the product unaffiliated with RJR, and controlled the information spread about the product. Viral marketing techniques may be particularly useful to promote new tobacco products such as Eclipse that have limited appeal and need a highly motivated audience of early adopters and acceptors. Such techniques help evade the mass rejection that could follow mass promotion, circumvent marketing restrictions, and allow tobacco companies to benefit from health claims made by consumers. Cigarette manufacturers must be held accountable for perceived health benefits encouraged by all promotional activities including viral marketing.

  9. Hurmeseitikki (Cortinarius purpureus) värjäyssienenä; hurmeseitikistä saatavia värisävyjä, ja niiden erot verihelttaseitikeistä (Cortinarius semisanguineus coll.) saataviin väreihin

    OpenAIRE

    Temmes, Outi

    2016-01-01

    Tutkimuksen tarkoituksena oli tutkia Suomessa vähemmän käytetyn värjäyssienen, hurmeseitikin (Cortinarius purpureus) värjäysominaisuuksia ja verrata niitä enemmän käytettyyn ja paljon hurmeseitikkiä muistuttavaan verhelttaseitikkien ryhmään (Cortinarius semisanguineus coll.). Tutkimuksen avulla pyrittiin vastaamaan seuraaviin tutkimuskysymyksiin; 1) Minkälaisia värejä hurmeseitikistä (C. purpureus) saadaan villaan eri pureteaineilla? 2) Miten hurmeseitikistä saatavat värit eroavat verihelttas...

  10. Caracterização morfométrica da bacia hidrográfica do rio Debossan, Nova Friburgo, RJ Morphometric characterization of Debossan river watershed, Nova Firburgo, RJ

    Directory of Open Access Journals (Sweden)

    Christiany Araujo Cardoso

    2006-04-01

    Full Text Available O objetivo deste trabalho foi fazer a caracterização morfométrica a partir de alguns parâmetros físicos da bacia hidrográfica do rio Debossan, Nova Friburgo, RJ. Para isso, gerou-se inicialmente o Modelo Digital de Elevação Hidrologicamente Consistente (MDEHC a partir de cartas topográficas do IBGE, na escala 1:50.000, utilizando o sistema de informações geográficas, através dos softwares ArcVIEW e Arc/INFO. A partir do MDEHC, foram calculados alguns parâmetros morfométricos para o estudo do comportamento hidrológico da bacia. A área de drenagem encontrada foi de 9,9156 km² e o perímetro, de 17,684 km. A bacia hidrográfica do rio Debossan tem formato alongado, coeficiente de compacidade de 1,5842, fator de forma de 0,3285 e índice de circularidade de 0,3985. A densidade de drenagem obtida para a bacia foi de 2,3579 km/km². A forma mais alongada da bacia hidrográfica indica que a precipitação pluviométrica sobre ela se concentra em diferentes pontos, concorrendo para amenizar a influência da intensidade de chuvas, as quais poderiam causar maiores variações da vazão do curso d'água.The objective of this work was to perform a morphometric characterization based on some physical parameters. In order to do so, a Hydrologically Consistent Digital Elevation Model (HCDEM was generated from IBGE topographical maps, scale 1:50.000, using as database and analysis the system of geographic information, by means of the ArcVIEW and Arc/INFO version 8.3 systems. From this, some morphometric parameters of a previous study on the hydrologic behavior of the watershed were calculated. The drainage area was 9,9156 Km² and 17,684 km in perimeter. The Debossan river watershed was proven not easily subject to floods as the compacity coefficient was far from the unit (1.5842 and its shape factor presented a low value (0.3285. Such fact can still be proven by the circularity index value (0.3985. The drainage density was 2,3579 Km

  11. Estimation of potentially contaminated sediment volume in cases of oil spill in a summer conditions to sandy beaches of Rio Grande do Sul, Brazil; Estimativa do volume sedimentar potencialmente contaminado em casos de derrame de oleo em condicoes de verao para praias arenosas do Rio Grande do Sul

    Energy Technology Data Exchange (ETDEWEB)

    Costi, Juliana; Calliari, Lauro J. [Fundacao Universidade Federal do Rio Grande (FURG), RS (Brazil)

    2008-07-01

    Field experiments relating oil of two different densities with sediment penetration along ocean beaches with distinct morphodynamic behavior along the RS coastline indicates that, for both types of oil, higher penetration is associated to beaches which display higher mean grain size. Based on penetration depth it is possible to estimate the volume of contaminated sediments due to oil spills that eventually can reach the coast. Sediment cores sampled at 80 days interval at two different places characterized by a dissipative and a intermediate beaches indicate a higher variation of the sediment parameters and volume associated to the intermediate beach. (author)

  12. Pilot project for the establishment of diagnosis reference level in pediatric computerized tomography in Rio de Janeiro city, RJ, Brazil; Projeto piloto para o estabelecimento de niveis de referencia de diagnostico em tomografia computadorizada pediatrica no municipio do Rio de Janeiro, RJ, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Jesus, Fillipe Machado de

    2014-08-01

    Computed tomography (CT) is an important method of diagnostic imaging has been widely used around the world. However, this important diagnostic tool has led to a considerable increase in the frequency of examinations, often without proper clinical justification. Consequently, CT is one of the diagnostic procedures that contributes most to the collective dose. Scientific studies show that the concern in pediatric procedures should be even higher. Despite the fact that these patients have a higher radiosensitivity and a higher life expectancy, the protocols of the examinations are not optimized and adult protocols are applied. Moreover, a recent study performed in the United States showed that one third of the examinations was not justified. The aim of this study was to conduct a pilot study of dose indicators in pediatric CT in four hospitals, in order to verify the feasibility of the diagnostic reference levels establishment for the county of Rio de Janeiro. The dose descriptors were estimated from the beam dosimetry by applying the protocols used in each examination. The total patient sample included 358 children of different age groups. The results observed in examinations of whole trunk (routine chest, upper abdomen and pelvis) and upper abdomen in Institution A, for patients aged 5-10 years, indicated that the mAs values used were not properly selected for patients' body mass index, presenting however, conformity with UK reference levels. In the case of head CT scans and routine chest CT scans in Institution B, although patients aged 5-10 years have shown conformity with UK reference levels, the kV and mAs values used, in some examinations, were also inappropriate for the patient characteristics. Similar result was observed in examinations of head and high resolution chest for patients neonates, in Institution D. For head and routine chest examinations of 1-5 years' age group, was Institution B that showed the lowest DLP values. This result was due to the lowest CTDlyol values found therein. Comparisons of DLP values among institutions, for each age group in each kind of examination, also allowed observe a mean difference of 2248% in the Institution A's values in relation to the Institution D's values, for high resolution chest examinations of the 5-10 years age group. These results indicate that few efforts are being devoted to radiation protection in pediatric computed tomography, there is a high potential for optimization and that to establish tomographic good practices is essential the determination of diagnostic reference levels. (author)

  13. Sedimentation in arctic proglacial lakes: Mittivakkat Glacier, SE Greenland

    DEFF Research Database (Denmark)

    Hasholt, Bent; Walling, Desmond Eric; Owens, P.N.

    2000-01-01

    lake sedimentation, sediment yields, sediment sources, calcium-137, lead-210, archz, proglacial, Greenland......lake sedimentation, sediment yields, sediment sources, calcium-137, lead-210, archz, proglacial, Greenland...

  14. Focus on Brazil

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1988-11-01

    Brazil, the largest country in South America with a population of almost 140 million, has been plagued since the early 1980s by high foreign debt (approximately US$121 billion at present) and hyperinflation (nearly 600 percent over the past 12 months). These factors, in combination with the slower than anticipated growth in electricity demand, have been instrumental in curtailing nuclear power development in the country. Following recommendations advanced in a commissioned study for improving Brazil`s nuclear program, Brazilian President Jose Sarney announced on August 31st the restructuring of the country`s nuclear industry.

  15. Analytical Ultracentrifugation: Sedimentation Velocity and Sedimentation Equilibrium

    Science.gov (United States)

    Cole, James L.; Lary, Jeffrey W.; Moody, Thomas; Laue, Thomas M.

    2009-01-01

    Analytical ultracentrifugation (AUC) is a versatile and powerful method for the quantitative analysis of macromolecules in solution. AUC has broad applications for the study of biomacromolecules in a wide range of solvents and over a wide range of solute concentrations. Three optical systems are available for the analytical ultracentrifuge (absorbance, interference and fluorescence) that permit precise and selective observation of sedimentation in real time. In particular, the fluorescence system provides a new way to extend the scope of AUC to probe the behavior of biological molecules in complex mixtures and at high solute concentrations. In sedimentation velocity, the movement of solutes in high centrifugal fields is interpreted using hydrodynamic theory to define the size, shape and interactions of macromolecules. Sedimentation equilibrium is a thermodynamic method where equilibrium concentration gradients at lower centrifugal fields are analyzed to define molecule mass, assembly stoichiometry, association constants and solution nonideality. Using specialized sample cells and modern analysis software, researchers can use sedimentation velocity to determine the homogeneity of a sample and define whether it undergoes concentration-dependent association reactions. Subsequently, more thorough model-dependent analysis of velocity and equilibrium experiments can provide a detailed picture of the nature of the species present in solution and their interactions. PMID:17964931

  16. Coral morphology and sedimentation.

    Science.gov (United States)

    Duckworth, Alan; Giofre, Natalie; Jones, Ross

    2017-08-29

    The sediment rejection ability of 8 coral species of 5 families and 3 morphologies were assessed in a series of short term exposure tests over a sedimentation range of 0.5-40mgcm(-2)d(-1) and one longer term exposure test of 235mgcm(-2). Sediment accumulation rates on live corals and dead (enamel-covered) skeletons varied between morphologies, with branching species often more adept at self-cleaning. Flow rates (0-17cms(-1)) significantly affected sediment-shedding ability as did differences in particle sizes, with coarse silt rejected faster than fine silt, but only at very high (235mgcm(-2)) deposition rates. Siliciclastic sediment was rejected faster than carbonate sediments and smothering for many days by mms of low organic content carbonate sediment resulted in bleaching, but no mortality. The findings are discussed with respect to turbidity generated in natural and dredging-related resuspension events and in the context for impact prediction for dredging projects. Copyright © 2017. Published by Elsevier Ltd.

  17. Inertial Screening in Sedimentation

    OpenAIRE

    Segre, P. N.

    2007-01-01

    We use particle image velocimetry to measure the sedimentation dynamics of a semi-dilute suspension of non-Brownian spheres at Reynolds numbers, $0.001\\le Re\\le 2.3$, extending from the Stokes to the moderately inertial regime. We find that the onset of inertial corrections to Stokes sedimentation occurs when the inertial screening length $l=a/Re$ becomes similar to the Stokes sedimentation length $\\xi_0$, at $Re_c= a/\\xi_0\\approx 0.05$. For $Re>Re_c$, inertial screening significantly reduces...

  18. The contribution of bank and surface sediments to fluvial sediment ...

    African Journals Online (AJOL)

    Sediment source studies involving a simple mixing model was undertaken in the Pra River Basin in Ghana using a single tracer 210Pb to determine the relative contribution of surface and bank sediments to the fluvial sediment transport. Sediment source tracing was performed on the basis of sub-basins by comparing the ...

  19. Gestão de Resíduos Sólidos em Meios de Hospedagem: Um Etudo de Caso do Projeto Lixo Mínimo do Hotel Bühler em Visconde de Mauá, RJ / Solid Waste Management in Hotels: A Case Study of the Project Minimum Solid Wastes in Bühler Hotel in Visconde de Maua, RJ

    Directory of Open Access Journals (Sweden)

    Suellen Alice Lamas

    2015-04-01

    Full Text Available O presente artigo refere-se a um estudo de caso, a saber, o Projeto Lixo Mínimo do Hotel Bühler, em Visconde de Mauá, RJ. Trata-se de um projeto ambiental desenvolvido pelos administradores do citado hotel, para minimizar os efeitos negativos da atividade turística sobre o meio natural. Buscou-se, através desta pesquisa, analisar as etapas do referido projeto ambiental, verificando a viabilidade de aplicação do mesmo em outros empreendimentos hoteleiros. Os resultados demonstram que ações simples, organizadas e eficientes podem ser desenvolvidas pelos empreendimentos hoteleiros, em especial os similares ao Hotel Bühler, ou seja, situado em área natural e que atende a um número limitado de hóspedes.  Solid Waste Management in Hotels: A Case Study of the Project Minimum Solid Wastes in Bühler Hotel in Visconde de Maua, RJ - This article refers to a case study, known as the Lixo Mínimo Project of the Bühler Hotel in Visconde de Mauá,RJ, an environmental project developed by the administrators to minimize the negative effects of tourist activity on the natural environment. This paper seeks to analyze the stages of the project, verifying the viability of its application to other enterprises. The results show that simple actions, organized and efficient, can be developed by other hotels , especially by hotels similar to the Bühler hotel – situated in a natural area and serving a limited number of guests.

  20. The Morsárjökull rock avalanche in the southern part of the Vatnajökull glacier, south Iceland

    Science.gov (United States)

    Sæmundsson, Şorsteinn; Sigurősson, Ingvar A.; Pétursson, Halldór G.; Decaulne, Armelle; Jónsson, Helgi P.

    2010-05-01

    On the 20th of March 2007 a large rock avalanche fell on Morsárjökull, one of the outlet glaciers from the southern part of the Vatnajökull ice cap, in south Iceland. This is considered to be one of the largest rock avalanches which have occurred in Iceland during the last decades. It is believed that it fell in two separate stages, the main part fell on the 20th of March and the second and smaller one, on the 17th of April 2007. The Morsárjökull outlet glacier is about 4 km long and surrounded by up to 1000 m high valley slopes. The outlet glacier is fed by two ice falls which are partly disconnected to the main ice cap of Vatnajökull, which indicates that the glacier is mainly fed by ice avalanches. The rock avalanche fell on the eastern side of the uppermost part of the Morsárjökull outlet glacier and covered about 1/5 of the glacier surface, an area of about 720,000 m2. The scar of the rock avalanche is located on the north face of the headwall above the uppermost part of the glacier. It is around 330 m high, reaching from about 620 m up to 950 m, showing that the main part of the slope collapsed. It is estimated that about 4 million m3 of rock debris fell on the glacier, or about 10 million tons. The accumulation lobe is up to 1.6 km long, reaching from 520 m a.s.l., to about 350 m a.s.l. Its width is from 125 m to 650 m, or on average 480 m. The total area which the lobe covers is around 720.000 m2 and its mean thickness 5.5 m. The surface of the lobe shows longitudinal ridges and grooves and narrow flow-like lobes, indicating that the debris mass evolved down glacier as a mixture of a slide and debris flow. The debris mass is coarse grained and boulder rich. Blocks over 5 to 8 m in diameter are common on the edges of the lobe up to 1.6 km from the source. No indication was observed of any deformation of the glacier surface under the debris mass. The first glaciological measurements of Morsárjökull outlet glacier were carried out in the year 1896

  1. Diagnosis of water quality: a way of developing environmental education in São João da Barra, RJ

    Directory of Open Access Journals (Sweden)

    Tâmmela Cristina Gomes Nunes

    2013-07-01

    Full Text Available As the 5th district of São João da Barra / RJ is lacking in basic sanitation, especially in relation to treated water and its distribution, the alternative found by the majority of the residents was the abstraction of groundwater, which is not always within the standards quality for consumption. The aim of this study was to evaluate the quality of groundwater consumed in school Cazumbá and Sabonete (5th district and reservoirs in the region, supplied by tanker trucks. Sampling was conducted both in the dry and in rainy season. After completion of the physical-chemical and microbiological analyzes was deployed an environmental education project at the local school.

  2. The Production and the Uneven Valorization of Urban Space in Campos Dos Goytacazes-RJ: An Analysis of State and Real Estate Developers Actions

    Directory of Open Access Journals (Sweden)

    Marcos Antônio Silvestre Gomes

    2015-07-01

    Full Text Available This article discusses some aspects of the production of urban space considering the social agents actions. The methodology was based on literature searches, data surveys and interviews in public and private agencies, empirical observations and mapping of the urban area. The methodology was based on literature searches, data surveys and interviews in public and private agencies, empirical observations and mapping of the urban area. The objective is to present an analysis of state and real estate developers actions in the production and uneven valorization of urban space in Campos dos Goytacazes-RJ. The results of work indicate the intensification and complexification of actions of these agents with the advent of the oil economy. In the period 1981-2011 there was an intense valuation of South West-East axis of the city, with a vertiginous process of vertical integration and deployment of a high standard closed allotments, which has

  3. Rooster fighting, animal rights and the environment for the brazilian federal supreme court – a review of the adi 1856/rj

    Directory of Open Access Journals (Sweden)

    Carolina Carneiro Lima

    2015-12-01

    Full Text Available The present paper realized an analysis of the articulated issues and the decision rendered by the Supreme Court in ADI 1856/RJ that discusses the legal validity of the Law enacted by the state of Rio de Janeiro that regulates the practice of the rooster fighting. The standard was declared unconstitutional by the reason of the cruelty, which is subjected the combatant race birds. The decision had as a parameter the principle of human dignity and the constitutional determination that the environment must be protected by the government and by the community. The study is realized under the anthropocentric conception. The goal is to analyze the issue of cruelty against the animals and the protection of the man against the loss of their own dignity with violent actions. For the study, the deductive method was used, by the means bibliographic search to answer the problem that has its heart in reason to protect animals from cruel acts.

  4. Atributos edáficos e de termiteiros de cupim-de-montículo (Isoptera: Termitidae em Pinheiral-RJ

    Directory of Open Access Journals (Sweden)

    Liane Barreto Alves Pinheiro

    Full Text Available Amostras de terra e de termiteiros da espécie Cornitermes cumulans (Kollar, 1832 (cupim-de-montículo foram comparadas quanto às propriedades químicas e biológicas, com o objetivo de avaliar a influência dos térmitas em algumas propriedades dos solos. O trabalho foi realizado em Pinheiral-RJ, em áreas de pastagem formada, pastagem nativa e plantio de eucalipto. Foram coletadas amostras de 60 termiteiros e do solo adjacente, ao longo de um ano, em quatro estações. A biomassa microbiana encontrada nos termiteiros foi superior à do solo na maioria das áreas e das estações avaliadas, e o fracionamento do carbono demonstrou que a maior parte deste está sob a forma de humina.

  5. Anomalias de Drenagem e Evolução da Paisagem no Médio Vale do Rio Paraíba do Sul (RJ/SP.

    Directory of Open Access Journals (Sweden)

    Telma Mendes da Silva

    2006-12-01

    Full Text Available The evolution of the drainage system is driven by influence structural and changes in the climatic regime resulting in specific morphological features.We studied one of these features – drainage anomalies – in the middle valley of Paraíba do Sul River (RJ/SP, the influence exerted by the lithology and drainage system rearrangement.We identified many morphotectonic features (knickpoints, flat drainage dividers, and low drainage dividers with or without drainage capture using topographic charts and a geomorphological map Silva (2002, and we also analyzed theirspatial distribution to establish a reliable relationship between the drainage anomalies and the substract characteristics. Most of the drainage anomalies the Paraíba do Sul Middle Valley Intra-plateauDepression (Depressão Interplanáltica Médio Paraíba do Sul - DIMPS and show a significant structural control.

  6. Prevalencia de carie e fluorose dentaria em escolares de 12 anos do Municipio de Paracambi-RJ e associações com variaveis socio-economicas

    OpenAIRE

    Cristiane de Souza Neves Fofano

    2007-01-01

    Resumo: Os objetivos desse estudo foram: a) determinar por meio de um estudo epidemiológico transversal a prevalência de cárie e fluorose dentária em Paracambi, RJ, na população de escolares na faixa etária dos 12 anos; b) avaliar se há relação entre a experiência de cárie e prevalência e grau de fluorose nas crianças avaliadas e o nível socioeconômico. A amostra foi composta por 263 escolares, distribuídos em 06 escolas públicas e 03 escolas privadas. Foram coletados dados sobre a cárie e a ...

  7. Avaliação da Capacidade de Autodepuração do Rio das Mortes no Município de Vassouras/RJ

    Directory of Open Access Journals (Sweden)

    Pedro Ricciardone

    2015-07-01

    Full Text Available Este trabalho apresenta uma simulação matemática da capacidade de autodepuração do Rio das Mortes no Município de Vassouras/RJ utilizando o modelo de Streeter-Phelps. A simulação do modelo é comparada com os dados experimentais medidos em campo de oxigênio dissolvido (OD e da demanda bioquímica de oxigênio (DBO. Os resultados obtidos apresentam o grau de poluição do corpo d´água e o comprimento necessário para que o mesmo recuperasse os níveis adequados de OD e DBO, apenas por processos naturais, e retornasse a estabilidade.

  8. “And they told two friends…and so on”: RJ Reynolds’ viral marketing of Eclipse and its potential to mislead the public

    Science.gov (United States)

    Anderson, S J; Ling, P M

    2010-01-01

    Objective To explore viral marketing strategies for Eclipse cigarettes used by the RJ Reynolds Company (Winston-Salem, North Carolina, USA). Methods Analysis of previously secret tobacco industry documents and multimedia materials. Results The failure of RJ Reynolds’ (RJR) 1988 “smokeless” cigarette, Premier, was in part due to widespread bad word of mouth about the product’s flavour, quality and difficulty of use. In 1994 RJR introduced an updated version of Premier, the ostensibly “reduced risk” Eclipse cigarette. RJR developed viral marketing channels to promote Eclipse using (1) exploratory interviews to motivate consumers to spread the word about Eclipse prior to market release, (2) promotional videos featuring positive feedback from test group participants to portray majority consensus among triers, (3) “Tupperware”-like parties for Eclipse where participants received samples to pass around in their social circles and (4) the Eclipse website’s bulletin board as a forum for potential users to discuss the brand in their own words. These strategies targeted the brand’s likeliest adopters, recruited informal and credible representatives of the product unaffiliated with RJR, and controlled the information spread about the product. Conclusions Viral marketing techniques may be particularly useful to promote new tobacco products such as Eclipse that have limited appeal and need a highly motivated audience of early adopters and acceptors. Such techniques help evade the mass rejection that could follow mass promotion, circumvent marketing restrictions, and allow tobacco companies to benefit from health claims made by consumers. Cigarette manufacturers must be held accountable for perceived health benefits encouraged by all promotional activities including viral marketing. PMID:18332064

  9. The environmental education program and the corporative social responsibility: a case study of the Nuclear Fuel Factory (FCN) in Resende/RJ

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Adriana A.A.; Silva, Ana Cristina L.; Pires, Flávia Cristina A.C., E-mail: adriana@inb.gov.br, E-mail: anaclsilva@inb.gov.br, E-mail: flaviapires@inb.gov.br [Indústrias Nucleares do Brasil (INB), Resende, RJ (Brazil)

    2017-07-01

    The Environmental Education Program (Programa de Educação Ambiental - PEA) of the Nuclear Fuel Factory (Fábrica de Combustível Nuclear - FCN) started in 2014 as part of the condition imposed by the Brazilian Environmental Regulatory Authority (IBAMA) for environmental licensing. The PEA for the local community aims to clarify the population about issues involving the company's activities and address potential environmental impacts that these activities may cause. The PEA for workers (PEAT) aims to promote environmental awareness, encourage good environmental practices and reinforce the importance of safety at work. By enlisting the participation of the employees and the local population, the study allowed the identification of the main issues of environmental aspects. Based on such research, the PEA prioritized the activities carried out at FCN and considered the following topics: environmental impacts, natural resources, waste generation, biodiversity, public policies, job generation and increase of real income and conservation units. The aim of this work is to share strategies and participative methodology as well as the achievements. In the context of the Corporative Social Responsibility, the implementation of the PEA is part of the company policy in accordance with its code of the ethics to support corporative programs with special focus on environmental preservation and the appreciation of the human being, besides providing transparent and true information to internal and external publics. The results in 2015 and 2016 demonstrated a participative management between the FCN and the local population in the districts of Areias/SP, Itatiaia/RJ and Resende/RJ. Besides that, the PEA enables to strengthen the corporative relations, to maintain a dialogue with the local community and to spread out the knowledge about nuclear technology. (author)

  10. Sediment Temperature, 2015

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data table contains summary data for temperature time series in near-surface sediments in high and low tidal marsh at 7 sites during 2015. These data support...

  11. Sediment Resuspension Data

    Data.gov (United States)

    U.S. Environmental Protection Agency — The full report on sediment resuspension in drinking water storage tanks and a link to an animation of results. This dataset is associated with the following...

  12. Offshore Surficial Sediment

    Data.gov (United States)

    California Department of Resources — This data layer (PAC_EXT.txt and PAC_PRS.txt) represents two of five point coverages of known sediment samples, inspections, and probes from the usSEABED data...

  13. Analytical Ultracentrifugation: Sedimentation Velocity and Sedimentation Equilibrium

    OpenAIRE

    Cole, James L.; Lary, Jeffrey W.; Moody, Thomas; Thomas M Laue

    2008-01-01

    Analytical ultracentrifugation (AUC) is a versatile and powerful method for the quantitative analysis of macromolecules in solution. AUC has broad applications for the study of biomacromolecules in a wide range of solvents and over a wide range of solute concentrations. Three optical systems are available for the analytical ultracentrifuge (absorbance, interference and fluorescence) that permit precise and selective observation of sedimentation in real time. In particular, the fluorescence sy...

  14. Towards Visual Sedimentation

    OpenAIRE

    Huron, Samuel; Vuillemot, Romain; Fekete, Jean-Daniel

    2012-01-01

    This Poster receive the Best Poster award from the IEEE INFOVIS committee.; International audience; We present Visual Sedimentation, a new design metaphor for visualizing streaming data inspired by the geological process of sedimentation. Our work started by early experiments visualiz- ing political Twitter streams during the French 2012 presidential elections, and social interactions during a TV show. In both cases, the positive feedback we received expressed an unexpectedly high level of en...

  15. Underwater Sediment Sampling Research

    Science.gov (United States)

    2017-01-01

    aggressive mixing imparted energy to the oil /sediment/water mixtures, and essentially set up a multi- phase system that was not in physio-chemical...This is necessary because variation in ROV design leaves many essential details unknown (e.g., electromechanical control cable vs. optical control...volatility, etc.). The aggressive mixing imparted energy to the oil /sediment/water mixtures, and essentially set up a multi- phase system that was

  16. Community Sediment Transport Model

    Science.gov (United States)

    2007-01-01

    with IKONOS imagery). The tidal-residual circulation (arrows, right panel) in the CSTM simulations generates sediment transport consistent with...method for estimating surface sediment concentrations from AVHRR using the method described in Myint and Walker (2002). Water quality parameters for...frequencies. A model with a spectral wave driver has a better convergence rate than a monochromatic wave driver. Optimized coupling frequencies are

  17. Labour Market Inequality in Brazil and India: A Comparative Brazil ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Labour Market Inequality in Brazil and India: A Comparative Brazil, Russia, India and China (BRIC) Study. Think tanks in Brazil and India ... to climate change. IDRC is investing in local solutions to address climate change-related challenges in India, including heat stress, water management, and climate-related migration.

  18. Labour Market Inequality in Brazil and India: A Comparative Brazil ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Inequality and the labour market : what can we learn from comparing India and Brazil?; project paper H (f). Rapports. Report on Policy Dialogue on Labour Market Inequality in Brazil and India : project paper G.2. Rapports. Vocational education and training (VET), inequality and the labour market in Brazil and India : a policy ...

  19. Dengue type 4 in Rio de Janeiro, Brazil: case characterization following its introduction in an endemic region.

    Science.gov (United States)

    Heringer, Manoela; Souza, Thiara Manuele A; Lima, Monique da Rocha Q; Nunes, Priscila Conrado G; Faria, Nieli Rodrigues da C; de Bruycker-Nogueira, Fernanda; Chouin-Carneiro, Thaís; Nogueira, Rita Maria R; Dos Santos, Flavia Barreto

    2017-06-09

    Due to the populations' susceptibility, DENV-4 introduction in 2010 led to the occurrence of explosive epidemics in the following years in Brazil. In 2011, DENV-4 was identified in Rio de Janeiro (RJ) and it was prevalent in 2012 and 2013. Here, we aimed to characterize clinical, epidemiological and laboratorial aspects of DENV-4 cases after this serotype introduction in an endemic scenario. Dengue suspected cases (n = 3727) were received and analyzed from January 2011 to December 2013, during outbreaks occurred in RJ, Brazil. Samples were submitted to virological, serological and molecular methods for case confirmation. DENV-4 cases (n = 705) were characterized according to the type of infection, disease severity and, viremia levels and NS1 antigenemia were accessed. Representative strains were partial sequenced for genotyping. DENV-4 was identified in 44.2% (705/1593) of dengue positive cases, virus isolated in 48.7% of the cases. Anti-DENV IgM was detected in 39.4% of the cases, however an increased detection was observed in cases with ≥4 days of symptoms (57.0%). NS1 antigen was identified in 41.5% of DENV-4 cases however, after immune complexes dissociation, the detection significantly increased (87.6%). Females were more affected than males, so did children aged 11-15 years old. Primary cases were more frequently observed than secondary ones and most of them were classified as dengue. No differences on NS1 antigenemia and viraemia within the groups were observed. Despite the higher frequency of severe disease on individuals >65 years old, no differences were observed among the groups and type of infection. However, DENV-4 fatal cases were more frequent on secondary infections (57.1%). DENV-4 Genotype II was identified with a probable origin from Venezuela and Colombia. It has been shown that laboratorial diagnosis is still a reliable tool for the disease surveillance, detecting and confirming emerging epidemics. Despite the occurrence of secondary

  20. URBAN WATERSHED STUDIES IN SOUTHERN BRAZIL

    Directory of Open Access Journals (Sweden)

    Cristiano Poleto

    2007-01-01

    Full Text Available One of the greatest problems observed in Brazilian urban watersheds are concerned to the amount of solid residues, domestic sewerage and sediments that are disposed in the rivers and streams that drain those areas. This project aims to present these problems through a study of case taken in an urban watershed in Porto Alegre city, Southern Brazil. For this study, different procedures were used, such as field surveys, interviews with the inhabitants, satellite images, sediment samples, flow measures and morphology assessment of part of the local fluvial system to check the degree of instability of the channel. In 2005, it was verified that 42.57% of the watershed was impermeable, considering the paved streets, the residential and commercial buildings and stone pavements. As there was no sewer treatment, most of this sewerage was directly disposed into the stream and the TOC has reached 20% (m/m. Moreover, the occupation of riparian areas, a great amount of soil exposed in the watershed, the nonpaved streets and a great volume of solid residues were causing the instability in the channel, silting the stream bed. The metals (Zn, Pb and Cr selected for this study are most frequently found in high concentrations in urban areas. The results suggest the occurrence of a high enrichment of the fluvial sediment by these metals. The concentrations of these elements vary temporally during storms due to the input of impervious area runoff containing high concentration of elements associated to vehicular traffic and other anthropogenic activities. Then, it is possible to conclude that the contamination of the urban watershed is reflected in the results obtained in the fluvial suspended sediments.

  1. Visceral leishmaniasis in Brazil

    Directory of Open Access Journals (Sweden)

    Mary Marcondes

    2013-10-01

    Full Text Available Visceral leishmaniasis (VL is among the most important vector-borne diseases that occur in Brazil, mainly due to its zoonotic nature. It is currently present in almost all Brazilian territory, and its control is a challenge both for veterinarians and for public health officials. The etiologic agent is Leishmania infantum (syn chagasi, and the main vector in Brazil is Lutzomyia longipalpis. Of all animals identified as reservoirs of VL, the dog is considered the most important domestic reservoir. Although the disease has already been identified in cats, the epidemiological role of this animal species is still unclear. This article presents a brief review of the epidemiological situation of the disease, its mode of transmission, clinical features in dogs and cats as well as possible risk factors associated with the occurrence of the disease in Brazil.

  2. [A better Brazil].

    Science.gov (United States)

    Lesser, Jeffrey

    2014-01-01

    Many countries in the Americas describe themselves as "nations of immigrants." In the United States, the myth of the "promised land" suggests that foreigners better themselves upon arrival because the nation is intrinsically great. In Brazil, however, the relationship between immigration and national identity is different. Many intellectuals, politicians, and cultural and economic leaders saw (and see) immigrants as improving an imperfect nation that has been tainted by the history of Portuguese colonialism and African slavery. As a result, immigrants were often hailed as saviors because they modified and improved Brazil, not because they were improved by Brazil. This "improvement" took place through absorption, mixture and with the use of increasingly flexible racial and ethnic categories.

  3. Petroleum and derivatives emulsification by bacterial consortium of sea meeds from Enseada do Forno-Armacao de Buzios (RJ); Emulsificacao de petroleo e seus derivados pelos consorcios bacterianos de algas da Enseada do Forno-Armacao dos Buzios (RJ)

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Frederico S. da; Crapez, Mirian A.C.; Krepsky, Natascha; Fontana, Luiz F.; Baptista-Neto, Jose Antonio [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)]. E-mail: fred@igeo.uff.br

    2004-07-01

    Constant petroleum spill over natural habitats made necessary alternatives for environmental damage mitigation and recuperation. Bio surfactants can be used as an alternative for oil spill once they reduce surface oil tension, making them soluble in water or can make it available from the sediments. Bacterial consortia were isolated and bio amplified from Caulerpa (C), Laurencia (L) and Dictyota (D) algae biofilm. Bacterial carbon (CB); surface tension (TS); Emulsification index (E{sub 24}) and non-aqueous (A) and aqueous (B) emulsification of gasoline, kerosene and Arabian Light were estimated in 0, 7, 15 and 30 days of incubation. Results show a decrease of Laurencia and Caulerpa CB. However, Dictyota showed an increase at CB. Laurencia TS showed no significant reduction at days 7 and 15. For Dictyota and Caulerpa there was a increase at day 7 and reduction at day 15. E{sub 24} was higher than 70% for all the three substances and consortia tested. Laurencia bacteria consortia presented emulsification B for Arabian Light and emulsification A for gasoline and kerosene. Caulerpa consortia emulsified all compounds. All bacterial consortia isolated were surfactant producer, with emulsification A and B, being indicated for recuperation of environments contaminated with oil and its derivatives compounds. (author)

  4. Scientific integrity in Brazil.

    Science.gov (United States)

    Lins, Liliane; Carvalho, Fernando Martins

    2014-09-01

    This article focuses on scientific integrity and the identification of predisposing factors to scientific misconduct in Brazil. Brazilian scientific production has increased in the last ten years, but the quality of the articles has decreased. Pressure on researchers and students for increasing scientific production may contribute to scientific misconduct. Cases of misconduct in science have been recently denounced in the country. Brazil has important institutions for controlling ethical and safety aspects of human research, but there is a lack of specific offices to investigate suspected cases of misconduct and policies to deal with scientific dishonesty.

  5. Sediment impacts on marine sponges.

    Science.gov (United States)

    Bell, James J; McGrath, Emily; Biggerstaff, Andrew; Bates, Tracey; Bennett, Holly; Marlow, Joseph; Shaffer, Megan

    2015-05-15

    Changes in sediment input to marine systems can influence benthic environments in many ways. Sponges are important components of benthic ecosystems world-wide and as sessile suspension feeders are likely to be impacted by changes in sediment levels. Despite this, little is known about how sponges respond to changes in settled and suspended sediment. Here we review the known impacts of sedimentation on sponges and their adaptive capabilities, whilst highlighting gaps in our understanding of sediment impacts on sponges. Although the literature clearly shows that sponges are influenced by sediment in a variety of ways, most studies confer that sponges are able to tolerate, and in some cases thrive, in sedimented environments. Critical gaps exist in our understanding of the physiological responses of sponges to sediment, adaptive mechanisms, tolerance limits, and the particularly the effect of sediment on early life history stages. Copyright © 2015 Elsevier Ltd. All rights reserved.

  6. Influenza-Sediment Interactions

    Science.gov (United States)

    Trusiak, A.; Block, K. A.; Katz, A.; Gottlieb, P.; Alimova, A.; Galarza, J.; Wei, H.; Steiner, J. C.

    2013-12-01

    A typical water fowl can secrete 1012 influenza virions per day. Therefore it is not unexpected that influenza virions interact with sediments in the water column. The influence of sediments on avian influenza virions is not known. With the threat of avian influenza emerging into the human population, it is crucial to understand virus survivability and residence time in a body of water. Influenza and clay sediments are colloidal particles and thus aggregate as explained by DLVO (Derjaguin & Landau, Verwey & Overbeek) theory. Of great importance is an understanding of the types of particulate or macromolecular components that bind the virus particles, and whether the virus remains biologically active. We present results of hetero-aggregation and transmission electron microscopy experiments performed with influenza A/PR8/38. Influenza particles are suspended with sediment and minimal nutrients for several days, after which the components are evaluated to determine influenza concentration and survivability. Transmission electron microscopy results are reported on the influenza-sediment aggregates to elucidate structure and morphology of the components.

  7. The microbiome of Brazilian mangrove sediments as revealed by metagenomics.

    Directory of Open Access Journals (Sweden)

    Fernando Dini Andreote

    Full Text Available Here we embark in a deep metagenomic survey that revealed the taxonomic and potential metabolic pathways aspects of mangrove sediment microbiology. The extraction of DNA from sediment samples and the direct application of pyrosequencing resulted in approximately 215 Mb of data from four distinct mangrove areas (BrMgv01 to 04 in Brazil. The taxonomic approaches applied revealed the dominance of Deltaproteobacteria and Gammaproteobacteria in the samples. Paired statistical analysis showed higher proportions of specific taxonomic groups in each dataset. The metabolic reconstruction indicated the possible occurrence of processes modulated by the prevailing conditions found in mangrove sediments. In terms of carbon cycling, the sequences indicated the prevalence of genes involved in the metabolism of methane, formaldehyde, and carbon dioxide. With respect to the nitrogen cycle, evidence for sequences associated with dissimilatory reduction of nitrate, nitrogen immobilization, and denitrification was detected. Sequences related to the production of adenylsulfate, sulfite, and H(2S were relevant to the sulphur cycle. These data indicate that the microbial core involved in methane, nitrogen, and sulphur metabolism consists mainly of Burkholderiaceae, Planctomycetaceae, Rhodobacteraceae, and Desulfobacteraceae. Comparison of our data to datasets from soil and sea samples resulted in the allotment of the mangrove sediments between those samples. The results of this study add valuable data about the composition of microbial communities in mangroves and also shed light on possible transformations promoted by microbial organisms in mangrove sediments.

  8. Brazil's mental health adventure.

    Science.gov (United States)

    Weingarten, Richard

    2003-01-01

    This is an account of my trips to Brazil in 2001 where I worked on a series of mental health projects with Brazilian colleagues. I first got interested in Brazil after I graduated from college when I was a Peace Corps volunteer in Northeast Brazil (Bahia state). After I got out of the Peace Corps I moved to Rio de Janeiro and went to work for United Press International (UPI) in their Rio bureau. I was UPI foreign news correspondent for a year and a half. Those years in Brazil were probably the happiest years of my life. Later on, after I became ill in the U.S., my Brazilian connection played an important role in my recovery. Raised in a Victorian family in a small town in the Midwest, and schooled in a traditional boarding school for boys and then at an all men's college, Brazil's lively Latino culture served as a healthy antidote for my tendency to be reserved and often depressed. My contact with Brazilians and Brazilian culture always beckoned me on. I maintained contact with my friends in Brazil and they stuck by me through my illness years. What seemed like my emotional and intellectual "excess" to me, was easily accepted by my Brazilian friends. I felt much more myself interacting with Brazilians and connected to a larger sense of self I developed in Brazil. I traveled to Brazil at every opportunity and made friends with Brazilians I met in the States. I initiated Portuguese classes at John Carroll University in Cleveland, Ohio in the early 1990s and then was invited to teach Brazilian culture to undergraduates. These appointments and my own resilience moved me past one depression and a dysthymia condition and into the wider community. I regained my confidence as a teacher, a role I had before and during the years of my illness. From this position, I organized a club for Brazilian students studying in the Cleveland area. After this teaching stint, I felt ready to pursue full time employment and began a job search that would eventually land me in New Haven at

  9. Copper in the sediment

    DEFF Research Database (Denmark)

    Nielsen, Søren Laurentius; Banta, Gary Thomas; Khan, Farhan

    2017-01-01

    route between sediment and water. Measured endpoints were Cu accumulation in root and leaves, relative growth rate, leaf mortality, chlorophyll concentration, and maximum photosynthetic quantum yield. Cu accumulation from the sediment was translocated to all parts of the plant, while Cu taken up from...... the water showed a tendency to remain in leaves. Effects on relative growth rate and leaf mortality were found only following uptake of Cu from the sediment. We tested effects of different salinities, acting as multiple stressors, together with Cu, but found only weak effects with little interaction with Cu......Eelgrass (Zostera marina L.) is an important organism in coastal marine waters and is highly likely to encounter exposure to multiple stressors, both anthropogenic contaminants and natural stressors. Here, we exposed eelgrass to a range of Cu concentrations and salinities, and also varied exposure...

  10. Eand P opportunities in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Castilho, Marcelo [National Petroleum Agency of Brasil (Brazil)

    2011-07-01

    Brazil is one of the world's largest economies and the country also has significant heavy oil reserves. This report from the National Petroleum Agency of Brazil aims at presenting the situation of the oil and gas sector in Brazil in terms of resources, production, regulatory framework and opportunities for the future. Brazil has numerous sedimentary basins at its disposal, most of them being prospected by both national and foreign companies from all over the world. Brazil has over 14 billion barrels of proven reserves, its production is 2,1 MMBbl/d and heavy oil represents almost 40% of that production. The National Petroleum Agency of Brazil is responsible for the implementation of oil sector policy with the aims of maintaining self-sufficiency, implementing good practices in terms of health and safety, and increasing local content. This paper pointed out that Brazil has an important opportunity to enhance its energy sector through the development of heavy oil.

  11. Sediment transport mechanics

    Science.gov (United States)

    Ballio, Francesco; Tait, Simon

    2012-12-01

    The Editor of Acta Geophysica and the Guest Editors wish to dedicate this Topical Issue on Sediment Transport Mechanics to the memory of Stephen Coleman, who died recently. During his career, Stephen had made an outstanding scientific contribution to the topic of Sediment Transport. The level of his contribution is demonstrated in the paper by Aberle, Coleman, and Nikora included in this issue, on which he started working before becoming aware of the illness that led to his untimely death. For scholars and colleagues Stephen remains an example of intellectual honesty and scientific insight.

  12. Portugal, a Brazil Colony

    National Research Council Canada - National Science Library

    Cid, Pedro

    2004-01-01

    ... a new America, in fact, some say that this new vague of migrants towards the terrinha, as Brazilians like to call Portugal, is connected to the strong barriers imposed by the US government, in recent years, to Brazilian citizens willing to enter the United States and to the rippling tide of anti-American feeling in Brazil, right now. Apart from...

  13. Caracterização da fauna edáfica em diferentes coberturas vegetais na região norte Fluminense Characterization of soil fauna in different vegetation covers in the northern Fluminense region (RJ

    Directory of Open Access Journals (Sweden)

    Maria Kellen da S. Moço

    2005-07-01

    (wet summer and dry winter under five different vegetation covers (eucalyptus, non-preserved forest, preserved forest, regenerating forest ('capoeira', and pasture in the northern Fluminense region (RJ, Brazil. Both soil and litter under the natural forest covers, in particular the preserved and non- preserved forest, generally showed higher organism density and abundance values than eucalyptus and pasture for in both collecting seasons. In general, there was no preference of organism groups for soil or litter. The organisms density and abundance, Shannon's index and Pielou's index also varied according to the season of the year and the differences among vegetation covers were more distinct in the summer than in the winter season. The Pielou's index was the most stable variable and, therefore, the most appropriate to study the dissimilarities among the vegetation covers in terms of distribution of groups of organisms.

  14. Diabetes Care in Brazil.

    Science.gov (United States)

    Coutinho, Walmir F; Silva Júnior, Wellington Santana

    2015-01-01

    The diabetes epidemic affects most countries across the world and is increasing at alarming rates in Latin America. Nearly 12 million individuals have diabetes in Brazil, and the current prevalence ranges from 6.3% to 13.5%, depending on the region and the diagnostic criteria adopted in each study. To provide an overview of diabetes care in Brazil, focusing on studies of diabetes epidemiology, prevalence of patients within the standard targets of care, and economic burden of diabetes and its complications. SciELO and PubMed searches were performed for the terms "diabetes," "Brazil," "Brazilian," and "health system"; relevant literature from 1990 to 2015 was selected. Additional articles identified from reference list searches were also included. All articles selected were published in Portuguese and/or English. Recent studies detected a prevalence of gestational diabetes mellitus of nearly 20%. Among patients with type 1 diabetes, almost 90% fail to reach target of glycemic control, with less than 30% receiving treatment for both hypertension and dyslipidemia. More than 75% of patients with type 2 diabetes are either overweight or obese. Most of these patients fail to reach glycemic targets (42.1%) and less than 30% reached the target for systolic and diastolic blood pressure, body mass index, or low-density lipoprotein cholesterol. Only 0.2% of patients reach all these anthropometric and metabolic targets. Brazil is the fourth country in the world in number of patients with diabetes. Regardless of the diabetes type, the majority of patients do not meet other metabolic control goals. The economic burden of diabetes and its complications in Brazil is extremely high, and more effective approaches for preventions and management are urgently needed. Copyright © 2015. Published by Elsevier Inc.

  15. Reservoir sedimentation research at the National Sedimentation Laboratory

    Science.gov (United States)

    Researchers at the National Sedimentation Laboratory have made important contributions to reservoir sedimentation research for most of the 50 years that the laboratory has existed. Early publications from the mid 1960s to the mid 1970s reported work on the development of gamma ray sediment measurem...

  16. O DESENVOLVIMENTO INOVATIVO EM CLUSTERS: uma análise sobre o setor cerâmico em Campos dos Goytacazes – RJ

    Directory of Open Access Journals (Sweden)

    Edson Terra Azevedo Filho

    2014-07-01

    Full Text Available A proposta do trabalho foi investigar o nível de desenvolvimento inovativo de um conjunto de empresas que fazem parte do cluster de cerâmica da cidade de Campos dos Goytacazes – RJ. O referido grupo de empresas que se caracteriza como unidade de análise é uma rede de treze empresas denominada Rede Campos Cerâmica (RCC, fundada em 2004. Para o alcance dos objetivos propostos foi efetuada uma análise comparativa entre práticas inovadoras geradoras de vantagens competitivas em clusters de sucesso de acordo com a literatura especializada no tema. Através da realização de um estudo de caso foi possível conhecer a realidade das empresas analisadas em relação à implementação de ações inovadoras e na transformação destas em diferenciais competitivos. Ao final do trabalho foi possível identificar o nível de desenvolvimento inovativo do referido grupo e a sua capacidade de geração de vantagens competitivas que permitem sua sobrevivência e diferenciação no mercado.   The purpose of this study was to investigate the level of innovative development of a set of companies that are part of the cluster of ceramic in Campos dos Goytacazes – RJ. This group of companies characterized as the unit of analysis is a network of thirteen companies named Rede Campos Cerâmica (RCC, founded in 2004. In order to achieve the proposed objectives was performed a comparative analysis of generating innovative practices for competitive advantage in successful clusters according to the literature on the subject. By conducting a case study it was possible to know the reality of companies analyzed in relation to the implementation of innovative actions and the transformation of these actions in competitive advantages. At the end of the study it was possible to identify the level of innovative development of the group and its ability to generate competitive advantages that allow their survival and differentiation in the market.

  17. Determination of As, Co, Cr and Fe on sediments and soil of the region of middle and low courses of the Rio da Velhas basin, MB, Brazil; Determinacao de As, Co, Cr e Fe em sedimentos e solo na regiao do medio e baixo curso da bacia do Rio das Velhas, Minas Gerais

    Energy Technology Data Exchange (ETDEWEB)

    Veado, Maria Adelaide R.V.; Trigueris, Giuliano de A.; Oliveira, Arno H. de; Carvalho, Fernando R. de [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Engenharia Nuclear]. E-mail: adelaide@nuclear.ufmg.br , heeren@nuclear.ufmg.br, fer@nuclear.ufmg.br; Veado, Julio Cesar C. [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Escola de Veterinaria. Dept. de Clinica e Cirurgia Veterinarias]. E-mail: cambraia@vet.ufmg.br; Menezes, Maria Angela de B. C. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil). Supervisao de Reator e Radioanalise. Setor de Radioquimica]. E-mail: menezes@urano.cdtn.br

    2000-07-01

    The regions of the middle and low courses of the Rio das Velhas Basin are important under economical point of view for Minas Gerais State because of the agricultural production and high bovine population. In this work sediment and soil samples were analysed at monitoring points near the river established by FEAM-Fundacao Estadual do Meio Ambiente. As, Co, Cr and Fe were determined by means k{sub 0}-Neutron Activation Analysis. The sediment's and soil's results suggested metal contamination probably due to metals carried by high course water. (author)

  18. Sediments of a retting yard

    Digital Repository Service at National Institute of Oceanography (India)

    Remani, K.N.; Venugopal, P.; Devi, K.S.; Unnithan, R.V.

    Sediments of a coconut husk retting yard and a reference station in Cochin backwaters, Kerala, India were studied for 1 yr. Effects of monsoon were found significant Organic carbon and organic matter showed enrichment in the retting ground sediments...

  19. Soils and organic sediments

    Energy Technology Data Exchange (ETDEWEB)

    Head, M.J. [University of Wollongong, Wollongong, NSW (Australia). School of Geosciences

    1999-11-01

    The organic component of soils is basically made up of substances of an individual nature (fats, waxes, resins, proteins, tannic substances, and many others), and humic substances (Kononova, 1966). These are complex polymers formed from breakdown products of the chemical and biological degradation of plant and animal residues. They are dark coloured, acidic, predominantly aromatic compounds ranging in molecular weight from less than one thousand to tens of thousands (Schnitzer, 1977). They can be partitioned into three main fractions:(i) Humic acid, which is soluble in dilute alkaline solution, but can be precipitated by acidification of the alkaline extract.(ii) Fulvic acid, which is soluble in alkaline solution, but is also soluble on acidification.(iii) Humin that cannot be extracted from the soil or sediment by dilute acid or alkaline solutions. It has mostly been assumed that the humic and fulvic acid components of the soil are part of the mobile, or `active` component, and the humin component is part of the `passive` component. Other types of organic sediments are likely to contain chemical breakdown products of plant material, plant fragments and material brought in from outside sources. The outside material can be contemporaneous with sediment deposition, can be older material, or younger material incorporated into the sediment long after deposition. Recognition of `foreign` material is essential for dating, but is not an easy task. Examples of separation techniques for humic and non humic components are evaluated for their efficiency 18 refs.

  20. Sulfur diagenesis in marine sediments

    Science.gov (United States)

    Goldhaber, M.

    1985-01-01

    Bacterial sulfate reduction occurs in all marine sediments that contain organic matter. Aqueous sulfide (HS-, H2S), one of the initial products of bacterial sulfide reduction, is extremely reactive with iron bearing minerals: sulfur is fixed into sediments as iron sulfide (first FeS and then Fe2S2). A working definition is given of sulfur diagenesis in marine sediments. Controls and consequences of sulfate reduction rates in marine sediments are examined.

  1. Toxicity Identification Evaluation (TIE) of Belford Roxo industrial plant effluent and its contribution in water quality of downstream of Sarapui River, Iguacu River sub-basin, Baia da Guanabara Basin, RJ, Brazil; Avaliacao e identificacao da toxicidade (Toxity Identification Evaluation - TIE) do efluente liquido do polo industrial de Belford Roxo, RJ, e sua contribuicao na qualidade das aguas do corso inferior do Rio Sarapui, sub-bacia do Rio Iguacu, Bacia da Baia da Guanabara, RJ, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Pires, Luiz Eduardo Botelho

    2006-07-01

    The quality of Belford Roxo Industrial Plant effluent and water from Sarapui River were evaluated with Daphnia similis, Ceriodaphnia dubia and Danio rerio acute and chronic toxicity tests. In association with the ecotoxicological monitoring, the Toxicity Identification Evaluation procedure were performed and the identification of the toxic compounds was possible. The Chloride ion was identified as the major toxic compound in the effluent with additional effects of Metals, Ammonium and Sulfide. For the Sarapui River, the compounds of Phosphorus and Nitrogen were identified as the major toxic compounds with addictive effects of Metals, Ammonium and Sulfide. Although the environmental impact estimation based on the effluent toxicity suggests a minor impact on the water quality of Sarapui River, this was already sufficiently contaminated to make impracticable the establishment of an aquatic community. The constant discharge of untreated sludge promotes the eutrophication of this water body and makes impossible the equilibrium of this ecosystem. (author)

  2. Deep-water sediment bypass

    NARCIS (Netherlands)

    Stevenson, Christopher J.; Jackson, Christopher A L; Hodgson, David M.; Hubbard, Stephen M.; Eggenhuisen, Joris T.|info:eu-repo/dai/nl/322850274

    Submarine gravity flows are a key process for transporting large volumes of sediment from the continents to the deep sea. The location, volume, and character of the sediment bypassed by these flows dictates the areal extent and thickness of the associated deposits. Despite its importance, sediment

  3. Anisakidae infection in five commercially important fish species from the State of Rio de Janeiro, Brazil

    Directory of Open Access Journals (Sweden)

    Danuza Pinheiro Bastos Garcia Mattos

    2014-12-01

    Full Text Available ABSTRACT. Mattos D.P.B.G., Lopes L.M.S., Verícimo M.A., Alvares T.S. & São Clemente S.C. Anisakidae larvae infection in five commercially important fish species from the State of Rio de Janeiro, Brazil. [Infecção por larvas Anisakidae em cinco espécies de peixes comercialmente importantes do Rio de Janeiro, Brasil.] Revista Brasileiro de Medicina Veterinária, 36(4:375-379, 2014. Laboratório de Inspeção e Tecnologia de Pescado, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Santa Rosa, Niterói, RJ 24230-340, Brasil. E-mail: scsc@vm.uff.br From March 2009 to March 2012, 213 teleostei fish were obtained from fish markets and fishermen from Niteroi and Cabo Frio municipalities, Rio de Janeiro State, Brazil. The fish belonged to the species Micropogonias furnieri (107; Trichiurus lepturus (35; Centropomus undecimalis (22; Genypterus brasiliensis (18; Pagrus pagrus (18; Pomatomus saltatrix (7 e Merluccius hubbsi (6. Nematode larvae of Anisakidae were found in P. saltatrix (85.71%; T. lepturus (71.42%, P. pagrus (55.55%, G. brasiliensis (50.00%, and M. furnieri (0.93%. The prevalence rates raised as fish size increased. The highest mean intensity was observed in T. lepturus parasitized by Contracaecum sp. (30.50 larvae per fish. The sites of infection were only mesenteries, hepatic capsule and gastric serosa. No larvae were found in flesh, however, the high prevalence and intensity observed in some species, could represent a risk to human health by the larvae migration to flesh.

  4. Artificial Crab Burrows Facilitate Desalting of Rooted Mangrove Sediment in a Microcosm Study

    Directory of Open Access Journals (Sweden)

    Nathalie Pülmanns

    2015-07-01

    Full Text Available Water uptake by mangrove trees can result in salt accumulation in sediment around roots, negatively influencing growth. Tidal pumping facilitates salt release and can be enhanced by crab burrows. Similarly, flushing of burrows by incoming tidal water decreases sediment salinity. In contrast to burrows with multiple entrances, the role of burrows with one opening for salinity reduction is largely unknown. In a microcosm experiment we studied the effect of artificial, burrow-like macro-pores with one opening on the desalting of mangrove sediment and growth of Rhizophora mangle L. seedlings. Sediment salinity, seedling leaf area and seedling growth were monitored over six months. Artificial burrows facilitated salt release from the sediment after six weeks, but seedling growth was not influenced. To test whether crab burrows with one opening facilitate salt release in mangrove forests, sediment salinities were measured in areas with and without R. mangle stilt roots in North Brazil at the beginning and end of the wet season. In addition, burrows of Ucides cordatus were counted. High crab burrow densities and sediment salinities were associated with stilt root occurrence. Precipitation and salt accumulation by tree roots seem to have a larger effect on sediment salinity than desalting by U. cordatus burrows.

  5. A EDUCAÇÃO AMBIENTAL E OS INSETOS: APRENDIZADO INTERATIVO NAS ESCOLAS PÚBLICAS DE CAMPOS DOS GOYTACAZES, RJ.

    Directory of Open Access Journals (Sweden)

    Thais Berçot Pontes Teodoro

    2017-04-01

    Full Text Available A inclusão de valores ambientais pode despertar nos indivíduos um potencial transformador, permitindo que este contribua para um mundo mais ético e sustentável. De forma a suprir parte da lacuna na educação básica, este projeto objetivou a difusão da entomologia para os alunos da rede pública de ensino de Campos dos Goytacazes – RJ. Através de atividades como exposição de coleção entomológica, palestras interativas, mostra de vídeos e aplicação de questionários, são transmitidos os conceitos, importâncias e curiosidades dos principais grupos de inseto. Os alunos puderam ver e sentir a textura dos exemplares de perto. Isso entusiasma e instiga a curiosidade das crianças, o que torna o aprendizado mais divertido e ajuda na fixação. Os questionários iniciais e finais avaliaram a mudança de pensamento sobre os assuntos abordados. Os resultados demonstram progresso no conhecimento de alguns aspectos importantes dos insetos.

  6. UTILIZAÇÃO DE RECURSOS ERGOGÊNICOS NUTRICIONAIS E/OU FARMACOLÓGICOS EM UMA ACADEMIA DA CIDADE DE BARRA DO PIRAÍ, RJ

    Directory of Open Access Journals (Sweden)

    Luana Palmeira Pereira

    2014-02-01

    Full Text Available The habit of doing workouts combined with use of nutritional ergogenic or pharmacological has grown considerably in the last years. Whether for esthetic reasons or in order to improve some performance aspects, athletes consume a large amount of these products. In this sense, the purpose of this study is: survey the consumers profile of a nutritional ergogenic resources in Barra do Piraí gyms (RJ state, enumerate the products used by users of both sexes and verify the prescription source of these products to researched participants, ascertain if the participants achieved the expected results with use of these products and if they caused any side effects. This is an observational study, which evaluated 101 athletes of both genders and social classes. It was found that the majority of participants 75% (n = 76 reported the use of nutritional ergogenic or pharmacological, with the highest prevalence among men. Two products were the most consumed: whey protein 56.57% (n = 34 and creatine 42.10% (n = 25. The majority 45% (n = 34 reported consuming ergogenic without an expert guidance. Therefore, that the study shows the importance of each time more the professional in the field of nutrition be inserted in the sports ground for possible explanations about the effects of this product type is found between sportsman.

  7. The Production and the Uneven Valorization of Urban Space in Campos Dos Goytacazes-RJ: An Analysis of State and Real Estate Developers Actions

    Directory of Open Access Journals (Sweden)

    Marcos Antônio Silvestre Gomes

    2015-07-01

    Full Text Available This article discusses some aspects of the production of urban space considering the social agents actions. The methodology was based on literature searches, data surveys and interviews in public and private agencies, empirical observations and mapping of the urban area. The methodology was based on literature searches, data surveys and interviews in public and private agencies, empirical observations and mapping of the urban area. The objective is to present an analysis of state and real estate developers actions in the production and uneven valorization of urban space in Campos dos Goytacazes-RJ. The results of work indicate the intensification and complexification of actions of these agents with the advent of the oil economy. In the period 1981-2011 there was an intense valuation of South West-East axis of the city, with a vertiginous process of vertical integration and deployment of a high standard closed allotments, which has contributed to a significant increase in land prices in specific parts of city. There was also a bigger increase in the land's prices in areas considered of greater real estate interest.

  8. IMPACTO AMBIENTAL AO LONGO DE TRILHAS EM ÁREAS DE FLORESTA TROPICAL DE ENCOSTA: Maciço da Tijuca Rio de Janeiro - RJ

    Directory of Open Access Journals (Sweden)

    Adriano Severo Figueiró

    2009-01-01

    Full Text Available La meta de esta investigación era identificar y evaluar la pendiente medioambiental generado por la propagación del efecto del borde en el sendero del bosque en dos áreas seleccionadas con los grados diferentes de densidad urbana (el área de Catrambi - densidad alta, y área de Soberbo - densidad baja, en el borde de Floresta da Tijuca - Río de Janeiro (RJ. La hipótesis activa era que el aumento en la presión urbana en el interfaz ciudad-bosque hace un cambio en la dinámica del efecto del borde, acelerando su propagación, sobre todo con respecto a el cambio estructural y el microclimatico, con un impacto directo en la funcionalidad del sistema. Se restringieron los datos del campo a cuatro variables principales: el análisis de estructura de vegetación en la frontera del sendero, Densidad del suelo en el sendero, variabilidad del microclima entre los senderos y, finalmente, análisis de hojarasca en los parcelas del bosque fronterizo.

  9. E-COMMERCE: UM ESTUDO SOBRE O COMPORTAMENTO DO CONSUMIDOR UNIVERSITÁRIO DE UMA INSTITUIÇÃO DE ENSINO SUPERIOR EM CAMPOS DOS GOYTACAZES - RJ

    Directory of Open Access Journals (Sweden)

    Carlos Jonathan Rocha Nunes

    2014-07-01

    Full Text Available O comércio pela internet vem ganhando força a cada dia e tornando-se um negócio extremamente rentável para muitos empresários, obrigando a rápidas adaptações. Considerando esse novo nicho de mercado, este estudo tem por objetivo analisar o comportamento dos estudantes, de uma Instituição de Ensino Superior em Campos dos Goytacazes/RJ, em relação às compras no ambiente eletrônico. Para isso foi realizada uma pesquisa através de um questionário aplicando apropriadamente em alunos do período noturno. Os resultados e conclusões evidenciam que o comportamento de compra online dos alunos Universitários tende a se tornar mais comum. Suas preferências estão relacionadas à aquisição de artigos eletroeletrônicos, e moda como roupas e acessórios. Muitas compras foram realizadas no período de 60 dias anteriores a pesquisa, indicado que esse tipo de comércio está em ascensão alavancado pelo enorme parcela de estudantes que se dizem muitos satisfeitos com a compra no ambiente virtual

  10. Sediment problems in reservoirs. Control of sediment deposits

    Energy Technology Data Exchange (ETDEWEB)

    Jacobsen, Tom

    1997-12-31

    When a reservoir is formed on a river, sediment will deposit in the reservoir. Such processes are unfortunate, for instance, for the implementation of hydroelectric energy. This thesis studies the problem of reservoir sedimentation and discusses methods of removing the sediments. Various aspects of reservoir sedimentation are discussed. Anthropogenic impacts seem to greatly affect the erosion processes. Temporal distribution is uneven, mainly because of the very large flood events. A world map showing the Reservoir Capacity: Annual Sediment Inflow ratio for reservoirs with volume equal to 10% of annual inflow has been prepared. The map shows that sedimentation is severe in the western parts of North and South America, eastern, southern and northern Africa, parts of Australia and most of Asia. The development of medium-sized reservoirs is difficult, as they are too large for conventional flushing technique and too small to store the sediment that accumulates during their economic lifetime. A computer model, SSIIM, was used with good results in a case study of two flood drawdown trials in Lake Roxburg, New Zealand. Two techniques have been developed that permits controlled suction of sediment and water into a pipe: the Slotted Pipe Sediment Sluicer (SPSS) and the Saxophone Sediment Sluicer (SSS). The techniques exploit the inflow pattern in through a slot in a pipe. An equation describing this inflow pattern was derived and verified experimentally. The SPSS is fixed near the reservoir bed, and sediment that deposits on top of it is removed in the sluicing process. The SSS sluices sediment from the surface of the sediment deposits. Some technical and economic conditions affecting the economics of sediment removal from reservoirs have been identified and studied. 79 refs., 112 figs., 14 tabs.

  11. Equine influenza in Brazil

    Directory of Open Access Journals (Sweden)

    Patricia Filippsen Favaro

    2016-06-01

    Full Text Available Equine influenza virus (EIV (H3N8 and H7N7 is the causative agent of equine influenza, or equine flu. The H7N7 subtype has been considered to be extinct worldwide since 1980. Affected animals have respiratory symptoms that can be worsened by secondary bacterial respiratory infection, thereby leading to great economic losses in the horse-breeding industry. In Brazil, equine influenza outbreaks were first reported in 1963 and studies on hemagglutination antibodies against viral subtypes in Brazilian horses have been conducted since then. The objective of the present review was to present the history of the emergence of EIV around the world and in Brazil and the studies that have thus far been developed on EIV in Brazilian equines.

  12. Innovation Policies of Brazil

    Science.gov (United States)

    2013-09-01

    and Embraer (aircraft manufacture), and private multinational companies include Vale (mining), Volkswagen do Brasil (automotive and biofuels...innovation. The high cost of doing business in Brazil known as custo Brasil is a barrier to starting and growing new businesses and arises from high...Exterior, MDIC) 1960 Responsible for policy development of industry, trade and services National Bank for Economic and Social Development ( Banco

  13. STYLISTICS IN BRAZIL

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Falcão Uchôa

    2015-11-01

    Full Text Available This article aims at pointing out the origins and the evolution of Stylistics in Brazil. After an introduction about the emergence, in Europe, of Stylistics as a discipline in the field of language studies, the article concerns itself with the contributions of Philology, Linguistics, the Theory of Literature and Grammar to the study of the most different stylistic devices employed by writers, particularly by Brazilian ones.

  14. Assessment of polycyclic aromatic hydrocarbon influx and sediment contamination in an urbanized estuary.

    Science.gov (United States)

    Garcia, Marina R; Mirlean, Nicolai; Baisch, Paulo R; Caramão, Elina B

    2010-09-01

    Sediments from the Patos Lagoon Estuary in Southern Brazil and sludge from incoming effluents were assessed for the distribution of polycyclic aromatic hydrocarbons (PAHs). Shallow sediments adjoining the City of Rio Grande were found to be contaminated by PAHs mainly near urban effluent discharge, as well as in the port area. Effluents clustered into four groups according to their sources (sewage, industrial, runoff, and mixed), with each demonstrating different contributions of PAHs to the estuary. There was a predominance of runoff and mixed sources. Navigation activity was the second most important source of PAHs to sediments. The PAHs ratio identified the origin of these contaminants as essentially pyrolytic. The impact of PAHs as a result of uncontrolled disposal or accidental discharge of PAH-rich residues was suggested for several points. These points were primarily near gas stations and motor workshops. In about 30% of sampled sediments, the concentration of benzo[a]pyrene surpassed the Threshold Effects Level adopted for marine environments.

  15. Cytogenetics of the Brazilian whiptail lizard Cnemidophorus littoralis (Teiidae from a restinga area (Barra de Maricá in Southeastern Brazil

    Directory of Open Access Journals (Sweden)

    D. Peccinini-Seale

    Full Text Available Chromosomes of Cnemidophorus littoralis, a new species of teiid lizard recently described, were studied. The animals are from a restinga area in Barra de Maricá, RJ. The karyotype presents a diploid number of 2n = 46 chromosomes and a chromosomal sex determination mechanism of the type XX:XY. Nucleolar organizer regions, Ag-NORs, are at the sixth pair of chromosomes; there is variability of size and number of the Ag-stained nucleoli on the 50 interphase nuclei for each specimen analyzed. These nucleoli are related to NOR patterns that also demonstrated variability in size and number. This paper presents the first description of the karyotype of Cnemidophorus littoralis and of a chromosomal sex determination mechanism of the XX:XY type in the genus Cnemidophorus from Southeastern Brazil.

  16. Blood parasites, total plasma protein and packed cell volume of small wild mammals trapped in three mountain ranges of the Atlantic Forest in Southeastern Brazil

    Directory of Open Access Journals (Sweden)

    MAML. Silva

    Full Text Available A study of blood parasites in small wild non-flying mammals was undertaken in three areas of the Atlantic Forest in Southeastern Brazil: Serra de Itatiaia, RJ, Serra da Bocaina, SP and Serra da Fartura, SP, from June 1999 to May 2001. A total of 450 animals (15 species were captured in traps and it was observed in 15.5% of the blood smears the presence of Haemobartonella sp. and Babesia sp. in red blood cells. There was no statistically significant difference between parasited and non-parasited specimens regarding total plasma protein, packed cell volume and body weight, which strongly suggests that these specimens might be parasite reservoirs.

  17. Schistosomiasis control in Brazil

    Directory of Open Access Journals (Sweden)

    Katz Naftale

    1998-01-01

    Full Text Available In 1975 the Special Programme for Schistosomiasis Control was introduced in Brazil with the objective of controlling this parasitic disease in six northeastern states. The methodology applied varied largely from state to state, but was based mainly on chemotherapy, This Programme was modified about ten years after it beginning with the main goals including control of morbidity and the blockage of establishment of new foci in non-endemic areas. In two states, Bahia and Minas Gerais, the schistosomiasis control programme started in 1979 and 1983, respectively. The recently made evaluation of those two programmes is the main focus of this paper. It must also be pointed out, that the great majority of the studies performed by different researchers in Brazil, at different endemic areas, consistently found significant decrease on prevalence and incidence, when control measures are repeatedly used for several years. Significant decrease of hepatosplenic forms in the studied areas is well documented in Brazil. After more than 20 years of schistosomiasis control programmes in our country, chemotherapy has shown to be a very important tool for the control of morbidity and to decrease prevalence and incidence in endemic areas. Nevertheless, in medium and long terms, sanitation, water supply, sewage draining and health education seem to be the real tools when the aim is persistent and definitive schistosomiasis control.

  18. Radiopharmacy education in Brazil

    Directory of Open Access Journals (Sweden)

    Ralph Santos-Oliveira

    2014-01-01

    Full Text Available The number of schools of pharmacy has been increasing each year in Brazil. From 2002 to 2013 over 300 new schools were opened in Brazil with a final number of 415 schools of pharmacy in operation around the country. Of these schools, only 28 schools offer a course in radiopharmacy (7.77%. However, the demand for such trained professionals has grown exponentially in Brazil, especially following amendment 49 (February 2006 that broke the monopoly on the production, distribution, and marketing of short half-life radiopharmaceuticals, and the recent constitutional amendment project 517/2010, which was approved in the last instance and is waiting for final approval by the President. Thus, in this scenario, there are a total of 417 radiopharmacy services across the country waiting for qualified professionals to fill posts. However, while there are insufficient trained professionals, radiopharmacy services under the aegis of Agencia Nacional de Vigilancia Sanitaria - Brazilian Health Surveillance Agency allow biomedical scientists and biologists to perform specialized functions as developed in radiopharmacy services without the presence of radiopharmacists.

  19. Health promotion in Brazil.

    Science.gov (United States)

    Ivo de Carvalho, Antonio; Westphal, Marcia Faria; Pereira Lima, Vera Lucia Góes

    2007-01-01

    Brazil, a Latin American country of continental proportions and contrasts, demographic inequalities, and social inequities, concomitantly faces the challenge of preventing and controlling infectious diseases, injuries, and non-communicable diseases. The loss of strength of the biomedical paradigm, the change in epidemiological profile, and the sociopolitical and cultural challenges of recent decades have fostered the emergence of new formulations about public health thinking and practice. Among them, are the paradigms of Brazilian Collective Health and Health Promotion. The former provides philosophical support for Brazil's Unified Health System (SUS). The aim of this article is to discuss the development of public health within the country's history, and to analyze and compare the theoretical assumptions of Health Promotion and Collective Health. We conclude that health promotion, based on the principles and values disseminated by the international Charters and concerned with social actors and social determinants of the health-disease process, has significant potential to promote the improvement of living and health conditions of the population. This frame of reference guided the formulation of the National Policy of Health Promotion within the Unified Health System, which was institutionalized by a ministerial decree. The importance and application of evaluating the effectiveness of health promotion processes and methodologies in Brazil have been guided by various frames of reference, which we clarify in this article through describing historical processes.

  20. Petrophysics of Palaeogene sediments

    DEFF Research Database (Denmark)

    Awadalkarim, Ahmed

    the in-situ vertical effective stress. The primary objectives of this Ph.D. study were: 1) to investigate and evaluate the influence of mineralogical composition, depositional texture and burial depth on petrophysical properties of Palaeogene sediments and to find out how the physical properties...... were obtained. A new approach for deriving reliable and accurate porosity of siliceous ooze is proposed here. The true density porosity was calculated by taking the number of electrons per unit volume into account. The true density porosity is similar to the corrected neutron porosity which indicates...... that the proposed interpretation is consistent. The proposed approach can be applied elsewhere and could be useful for petrophysicis comunity. The studied siliceous ooze intervals apparently do not contain hydrocarbons. X-ray diffraction (XRD) analyses and surface area by BET method have been done on 116 sediment...

  1. Sedimentation of active particles

    OpenAIRE

    Vachier, Jérémy; Marco G. Mazza

    2017-01-01

    Active particles convert energy from chemical, biochemical, or other processes into motion. Their collective motion has attracted enormous interest on account of the technological applications of artificial and biological particles. By combining theoretical arguments, and molecular dynamics simulations we explore the collective behavior of active particles under a gravity field in three dimensions. Dilute systems exhibit sedimentation, which we study with two approaches. Firstly, we solve ana...

  2. Sedimentation in Eelgrass

    OpenAIRE

    Ottosen, Mathias

    2015-01-01

    Protection of coastal areas has been a major political issue over the last decades. The coastline is in many places eroded by waves and current, and mechanical structures have been build to prevent the erosion. The abundance of the ma- rine flowering plant eelgrass (Zostera marina) has decline over the last century because of natural and anthropological reasons. Scientists have for many years thought that eelgrass enhances sedimentation by attenuating waves and cur- rent. Th...

  3. Determination of total and organic mercury and evaluation of methylation and demethylation processes in sediments of the Rio Grande Reservoir, State of Sao Paulo, Brazil; Determinacao de mercurio total e organico e avaliacao dos processos de metilacao e desmetilacao em sedimentos do Reservatorio Rio Grande, Estado de Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Franklin, Robson Leocadio

    2010-07-01

    The Rio Grande reservoir is located in the metropolitan area of Sao Paulo and it is a very important water supply for this region. In the present study bottom waters and sediment samples collected in this reservoir, in four sampling points, in four campaigns, from September 2008 to January 2010, were analyzed. Firstly total Hg was determined in sediment and bottom waters by cold vapor atomic absorption technique (CV AAS). Following, the analytical methodology for organic Hg was adapted from literature, where the organomercurial compounds were extracted with dichloromethane in acid medium and subsequent destruction of organic compounds by bromine chloride. The validation of this methodology, in terms of precision and accuracy, was performed by means of IAEA 405 and BCR-CRM 580 reference materials analyses. For methylation and demethylation processes evaluation in this environment, the following physical and chemical parameters were assessed, in situ: pH, water temperature, redox potential (EH), transparency and depth. For the sediment samples, granulometry, total organic carbon, sulphate-reducing bacteria, total N and P, besides the metals Co, Cu, Fe and Mn were evaluated. The selection of these parameters was related to the factors that influence the behavior of MeHg in the sediments and its transition zone. Total Hg ranging from 1.0 to 71.0 mg kg'-{sup 1} and organic mercury from <10.0 to 47.2 {mu}g kg{sup -1} in sediments and methylation rates from 0.06 to 1.4% were found, along the reservoir. Different methylation conditions along the reservoir and its influences were also discussed. As supplementary study the concentration of some metals and trace elements in the sediments by neutron activation analysis technique was determined. As, Ba, Br, Co, Cr, Cs, Hf, Fe, Na, Rb, Sb, Sc and Zn and rare earth elements Ce, Eu, La, Lu, Nd, Sm and Yb were determined. The enrichment factor in relation to earth crust values using Sc as normalizer element reached values

  4. Magnetism of quaternary sediments

    Science.gov (United States)

    Heller, Friedrich

    Magnetism of Quaternary sediments was the topic of a well-attended symposium held during the 13th INQUA (International Union of Quaternary Research) congress in Beijing, China, August 2-9. More than 40 papers were delivered by scientists from Belgium, England, France, Germany, Japan, New Zealand, Sweden, Switzerland, Taiwan, the United States, the Soviet Union, Yugoslavia, and other countries. The host country contributed to a productive session that was part of the first large scientific meeting to take place in Beijing after the June 4, 1989, upheaval.Nearly half of the studies focused on paleomagnetic and rock magnetic properties of loess in Alaska, Central Asia, China, and New Zealand. Magnetostratigraphic polarity dating was done at some sections in the western (Shaw et al.) and central Chinese loess plateau (Bai and Hus; Wang and Evans; Yue). The interpretation of the polarity pattern found in the western loess plateau still is not unambiguous. In the central part, certain polarity boundaries, such as the Brunhes/Matuyama (B/M) boundary, are found in slightly different stratigraphic positions (Hus et al.; Yue). In deep-sea sediments the lock-in depth of natural remanent magnetization (NRM) at the B/M boundary seems to be a linear function of sedimentation rate (de Menocal et al.). Although the magnetization process in the Chinese loess is not well understood, detailed records of polarity transitions have been reported for the B/M and the Jaramillo R→N transition (Ma et al.; Rolph).

  5. Labour Market Inequality in Brazil and India: A Comparative Brazil ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Labour Market Inequality in Brazil and India: A Comparative Brazil, Russia, India and China (BRIC) Study ... and the Institute for Human Development in Delhi who will develop comparable measures of inequality in wage income and examine contributing factors such as ... Centro Brasileiro de Analise e Planejamento.

  6. Muddy marine sediments are gels

    Science.gov (United States)

    Dorgan, K. M.; Clemo, W. C.; Barry, M. A.; Johnson, B.

    2016-02-01

    Marine sediments cover 70% of the earth's surface, are important sites of carbon burial and nutrient regeneration, and provide habitat for diverse and abundant infaunal communities. The majority of these sediments are muds, in which bioturbation affects sediment structure and geochemical gradients. How infaunal activites result in particle mixing depends on the mechanical properties of muddy sediments. At the scale of burrowing animals, muds are elastic solids. Animals move through these elastic muds by extending crack-shaped burrows by fracture. The underlying mechanism driving this elasticity, however, has not been explicitly illustrated. Here, we test the hypothesis that the elastic behavior of muddy sediments is disrupted by removal of organic material by measuring fracture toughness and stiffness of manipulated and control sediments. Our results indicate that the mechanical responses of sediments to forces are governed by the muco-polymeric matrix of organic material. Similar effects of organic material oxidation were not observed in sands, indicating a clear mechanical distinction between fine- and coarse-grained sediments. Muddy sediments are gels, not fluids or granular materials, and models of how sediments respond to forces imposed by, e.g., organisms, gases, and ambient water should explicitly consider the role of organic material.

  7. ANÁLISE DA GESTÃO DE CONFLITOS INTERPESSOAIS NAS ORGANIZAÇÕES PÚBLICAS DE ENSINO PROFISSIONALIZANTE EM NOVA IGUAÇU – RJ ANALYSIS OF INTERPERSONAL CONFLICT MANAGEMENT IN PUBLIC ORGANIZATIONS OF VOCATIONAL EDUCATION IN NOVA IGUAÇU – RJ ANÁLISIS DE LA GESTIÓN DE CONFLICTOS INTERPERSONALES EN LAS ORGANIZACIONES PÚBLICAS DE ENSEÑANZA PROFESIONAL EN NOVA IGUAÇU – RJ

    Directory of Open Access Journals (Sweden)

    Talita Almeida de Campos Nascimento

    2013-01-01

    Full Text Available A gestão dos conflitos interpessoais torna-se  complexa no contexto das organizações públicas, especialmente na área educacional. Passa a ser necessário, então, avaliar os processos de gestão de conflitos interpessoais nessas instituições, principalmente porque os relacionamentos interpessoais e o comprometimento dos servidores são elementos vitais na qualidade e na efetividade do processo educacional. A partir dessa discussão, esta pesquisa visa compreender como os servidores públicos lidam com esse fenômeno. Para isso, busca-se esclarecer alguns pontos sobre os principais tipos de conflitos, suas causas, as formas de gerenciamento utilizadas e seus impactos. Dessa forma, foi realizada uma pesquisa de campo em duas instituições públicas de ensino profissionalizante do município de Nova Iguaçu, a Unidade de Ensino Descentralizada de Nova Iguaçu do CEFET/RJ e a Escola Técnica Estadual João Luiz do Nascimento. Assim, foram realizadas entrevistas com seus servidores e posterior análise de conteúdo, que pôde concluir que não existem mecanismos de gestão de conflitos nesses órgãos, mas sim um gerenciamento realizado de forma pessoal, além de corroborar as fontes de conflitos abordadas na teoria. Conclui-se também que, nas organizações estudadas, os conflitos interpessoais podem impactar negativamente as relações de trabalho.The management of interpersonal conflict becomes complex in the context of public organizations, and especially in education. Becomes necessary then to evaluate the processes of interpersonal conflict management in these institutions, mainly because the interpersonal relationships and commitment are vital elements in the quality and effectiveness of the educational process. From this discussion, this research aims to understand how the civil servants dealing with this phenomenon. For this, we will seek to clarify some points about the main types of conflict, its causes, forms

  8. Variabilidade espacial e sazonal da concentração de elementos-traço em sedimentos do sistema estuarino de Santos-Cubatão (SP Spatial and seasonal variability of trace-element concentrations in sediments from the Santos-Cubatão estuarine system, São Paulo, Brazil

    Directory of Open Access Journals (Sweden)

    Wanilson Luiz-Silva

    2006-04-01

    Full Text Available Multi-element analyses of sediment samples from the Santos-Cubatão Estuarine System were carried out to investigate the spatial and seasonal variability of trace-element concentrations. The study area contains a rich mangrove ecosystem that is a habitat for tens of thousands of resident and migratory birds, some of them endangered globally. Enrichments of metals in fine-grained surface sediments are, in decreasing order, Hg, Mn, La, Ca, Sr, Cd, Zn, Pb, Ba, Cu, Cr, Fe, Nb, Y, Ni and Ga, relative to pre-industrial background levels. The maximum enrichment ranged from 49 (Hg to 3.1 (Ga. Mercury concentrations were greater in the Cubatão river than in other sites, while the other elements showed greater concentrations in the Morrão river. Concentrations of Mn were significantly greater in winter and autumn than in summer and spring. However, other elements (e.g. Cd and Pb showed the opposite, with greater concentrations in summer and spring. This study suggests that seasonal changes in physical and chemical conditions may affect the degree of sediment enrichment and therefore make the assessment of contamination difficult. Consequently, these processes need to be considered when assessing water quality and the potential contamination of biota.

  9. Characterization of sediment from the dredging of storm water channels in the city of Salvador-BA, Brazil aiming to use in structural ceramics; Caracterizacao de sedimento proveniente de dragagem de canais pluviais do municipio de Salvador-BA visando sua utilizacao em ceramica estrutural

    Energy Technology Data Exchange (ETDEWEB)

    Santos, O.C.; Breitenbach, S.B.; Coelho, R.E., E-mail: engcruz@ig.com.br, E-mail: silviabb@ifba.edu.br, E-mail: rodrigoecoelho@gmail.com [Instituto Federal de Educacao, Ciencia e Tecnologia da Bahia (IFBA), Salvador (Brazil); Andrade, J.C.S.; Sales Junior, J.C.C., E-mail: jean.engmateriais@gmail.com, E-mail: jccalado@gmail.com [Universidade Federal do Amazonas (UFAM), Manaus (Brazil). Dept. de Engenharia de Materiais; Paskocimas, C.A.; Martinelli, A.E.; Nascimento, R.M., E-mail: paskocimas@uol.com.br, E-mail: aemart@uol.com.br, E-mail: rubensmaribondo@gmail.com [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Programa de Pos-Graduacao em Ciencia e Engenharia de Materiais

    2017-01-15

    The aim of this study was to characterize sediment from the dredging of storm water channels (Scp) in the city of Salvador, Bahia, aiming its maximum replacement by clay in structural ceramics, since this binary mixture is part of the pilot project of the standard mass, in the research of interlocked block ceramic formulation. Initially, the sediment was submitted to the following tests: plasticity index; chemical analysis by X-ray fluorescence; mineralogical analysis by X-ray diffraction; thermal and particle size analyses. The morphology of the material was analyzed by scanning electron microscopy, coupled with energy dispersive spectroscopy. Then, sediment (Scp) was added to clay from the municipality of Candelas, Bahia, in the proportions of 10, 20, 30 and 40 wt%. Specimens were prepared by uniaxial pressing in dimensions of 60 mm x 20 mm, with compacting pressure of 25 MPa, and the material was humidified with 8% of water. Firing was conducted in resistive furnace at temperatures of 850, 950 and 1050 deg C, with 5 deg C / min heating rate. The properties evaluated were: linear shrinkage; water absorption and modulus of rupture. The results indicated the possibility of using SCP in structural ceramics by the prerequisites required in standards, in the manufacture of tiles, sealing blocks and bricks. (author)

  10. Spatial and seasonal variability of trace-element concentrations in sediments from the Santos-Cubatao estuarine system, Sao Paulo, Brazil; Variabilidade espacial e sazonal da concentracao de elementos-traco em sedimentos do sistema estuarino de Santos-Cubatao (SP)

    Energy Technology Data Exchange (ETDEWEB)

    Luiz-Silva, Wanilson [Universidade Estadual de Campinas, SP (Brazil). Inst. de Geociencias]. E-mail: wanilson@ige.unicamp.br; Matos, Rosa Helena Ribeiro; Kristosch, Giane Chaves [UNESP, Rio Claro, SP (Brazil). Dept. de Zoologia; Machado, Wilson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Inst. de Geoquimica

    2006-03-15

    Multi-element analyses of sediment samples from the Santos-Cubatao Estuarine System were carried out to investigate the spatial and seasonal variability of trace-element concentrations. The study area contains a rich mangrove ecosystem that is a habitat for tens of thousands of resident and migratory bi some of them endangered globally. Enrichments of metals in fine-grained surface sediments are, in decreasing order, Hg, Mn, La, Ca, Sr, Cd, Zn, Pb, Ba, Cu, Cr, Fe, Nb, Y, Ni and Ga, relative to pre-industrial background levels. The maximum enrichment ranged from 49 (Hg) to 3.1 (Ga). Mercury concentrations were greater in the Cubatao river than in other sites, while the other elements showed greater concentrations in the Morrao river. Concentrations of Mn were significantly greater in winter and autumn than in summer and spring. However, other elements (e.g. Cd and Pb) showed the opposite, with greater concentrations in summer and spring. This study suggests that seasonal changes in physical and chemical conditions may affect the degree of sediment enrichment and therefore make the assessment of contamination difficult. Consequently, these processes need to be considered when assessing water quality and the potential contamination of biota.(author)

  11. Impact of a Reference Center on Leprosy Control under a Decentralized Public Health Care Policy in Brazil.

    Science.gov (United States)

    Barbieri, Raquel Rodrigues; Sales, Anna Maria; Hacker, Mariana Andrea; Nery, José Augusto da Costa; Duppre, Nádia Cristina; Machado, Alice de Miranda; Moraes, Milton Ozório; Sarno, Euzenir Nunes

    2016-10-01

    We evaluated the profile of patients referred to the Fiocruz Outpatient Clinic, a reference center for the diagnosis and treatment of leprosy in Rio de Janeiro, RJ, and analyzed the origins and outcomes of these referrals. This is an observational retrospective study based on information collected from the Leprosy Laboratory database at Fiocruz, Rio de Janeiro, RJ, Brazil. A total of 1,845 suspected leprosy cases examined at the reference center between 2010 and 2014 were included. The originating health service referrals and diagnostic outcomes were analyzed as well as the clinical and epidemiological data of patients diagnosed with leprosy. Our data show that the profile of the patients treated at the Clinic has changed in recent years. There was an increase in both the proportion of patients with other skin diseases and those who had visited only one health service prior to our Clinic. Among the total 1,845 cases analyzed, the outcomes of 1,380 were linked to other diseases and, in 74% of these cases, a biopsy was not necessary to reach a diagnostic conclusion. A decrease in new leprosy case detection among our patients was also observed. Yet, among the leprosy patients, 40% had some degree of disability at diagnosis. The results of the present study demonstrated the importance of referral centers in support of basic health services within the decentralization strategy. But, the success of the program depends on the advent of new developmental tools to augment diagnostic accuracy for leprosy. However, it should be emphasized that for new diagnostic methods to be developed, a greater commitment on the part of the health care system regarding research is urgently needed.

  12. Impact of a Reference Center on Leprosy Control under a Decentralized Public Health Care Policy in Brazil.

    Directory of Open Access Journals (Sweden)

    Raquel Rodrigues Barbieri

    2016-10-01

    Full Text Available We evaluated the profile of patients referred to the Fiocruz Outpatient Clinic, a reference center for the diagnosis and treatment of leprosy in Rio de Janeiro, RJ, and analyzed the origins and outcomes of these referrals.This is an observational retrospective study based on information collected from the Leprosy Laboratory database at Fiocruz, Rio de Janeiro, RJ, Brazil. A total of 1,845 suspected leprosy cases examined at the reference center between 2010 and 2014 were included. The originating health service referrals and diagnostic outcomes were analyzed as well as the clinical and epidemiological data of patients diagnosed with leprosy.Our data show that the profile of the patients treated at the Clinic has changed in recent years. There was an increase in both the proportion of patients with other skin diseases and those who had visited only one health service prior to our Clinic. Among the total 1,845 cases analyzed, the outcomes of 1,380 were linked to other diseases and, in 74% of these cases, a biopsy was not necessary to reach a diagnostic conclusion. A decrease in new leprosy case detection among our patients was also observed. Yet, among the leprosy patients, 40% had some degree of disability at diagnosis.The results of the present study demonstrated the importance of referral centers in support of basic health services within the decentralization strategy. But, the success of the program depends on the advent of new developmental tools to augment diagnostic accuracy for leprosy. However, it should be emphasized that for new diagnostic methods to be developed, a greater commitment on the part of the health care system regarding research is urgently needed.

  13. Estrutura e composição florística do estrato arbóreo de um remanescente de Mata Atlântica submontana no município de Rio Bonito, RJ, Brasil (Mata Rio Vermelho Structure and floristic composition of a tree community in a submontane Atlantic Forest remnant in Rio Bonito, RJ, Brazil (Rio Vermelho Forest

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    Fabrício Alvim Carvalho

    2007-08-01

    Full Text Available Neste trabalho, descreveram-se a composição florística e a estrutura do estrato arbóreo de um remanescente de Floresta Ombrófila Densa Submontana (Mata Rio Vermelho na região Centro-Norte fluminense, comparando-a com outras florestas da região. Foram alocadas oito parcelas de 5 m x 100 m, e todos os indivíduos vivos e mortos com DAP > 5 cm foram amostrados. Ao todo, foram registradas 106 espécies pertencentes a 77 gêneros e 32 famílias. As famílias com maior riqueza de espécies foram Leguminosae (13 espécies e Lauraceae (8, e as mais abundantes foram Monimiaceae (13% dos indivíduos e Leguminosae (11%. As espécies mais importantes quanto ao valor de cobertura (VC foram Siparuna guianensis, Apuleia leiocarpa, Cupania oblongifolia e Machaerium brasiliensis, todas características de áreas secundárias. O índice de diversidade de espécies (H' = 3,91 nats.ind-1 foi próximo ao encontrado em outras florestas secundárias. Os resultados (elevado número de árvores mortas, com lianas, perfilhadas e secundárias iniciais; baixo número de árvores de grande porte e área basal indicaram que a mata em foco se encontrava perturbada e em fase de regeneração intermediária. Ainda assim, permanecia detentora de considerável riqueza e diversidade florística, com espécies arbóreas ameaçadas de extinção, como Melanoxylon brauna e Dalbergia nigra. Devido à importância ecológica desde remanescente para a manutenção da flora e fauna local e ao avançado processo de fragmentação da região, sugere-se que a Mata Rio Vermelho seja prioritária em programas de conservação e manejo.This work describes the floristic composition and forest structure of a tree community in a Submontane Ombrofilous Dense Atlantic forest (Rio Vermelho Forest and compares this forest to other remnant forests in the region. Eight 100 m x 5 m plots were allocated and all trees > 5 cm DBH were sampled. A total of 106 species was sampled, distributed in 77 genus and 32 families. The richest families in number of species were Leguminosae (13 species and Lauraceae (8. Monimiaceae (13% of trees and Leguminosae (11% had the highest densities. The most important species (cover value were Siparuna guianensis, Apuleia leiocarpa, Cupania oblongifolia and Machaerium brasiliensis. These species are common in secondary Atlantic forests. The species diversity (H' = 3,91 nats.ind-1 can be considered within the values found for secondary Atlantic forests. Based on the floristic data and the high values found for standing dead trees, trees supporting lianas, number of multiple stems and number of early secondary species and the low number of large trees, this forest can be classified as a secondary forest in an intermediate regenerating status. However, this forest still has a considerable richness and diversity with some endangered tree species such as Melanoxylon brauna and Dalbergia nigra. Due to its ecological importance for the local flora and fauna and the fragmentation process in the region, this remnant forest should be considered as a priority area for establishment of conservation and management practices.

  14. Vibrio spp. isolados a partir de mexilhões (Perna perna in natura e pré-cozidos de Estação Experimental de Cultivo, Rio de Janeiro, RJ, Brasil Vibrio spp. isolated from in natura and precooked mussels (Perna perna of an Experimental Station Culture, Rio de Janeiro, RJ, Brazil

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    Christiane Soares Pereira

    2007-06-01

    Full Text Available A análise microbiológica dos mexilhões reflete a qualidade do habitat aquático, pois estes animais podem reter em seus organismos diversos patógenos, dentre os quais aqueles pertencentes à família Vibrionaceae. No presente estudo foi avaliada a presença de Vibrio spp. em mexilhões (in natura e pré-cozidos, comercializados na Estação Experimental de Cultivo de Mexilhões, situada em Jurujuba, Niterói, Rio de Janeiro. Foram avaliadas 86 amostras, tomando como procedimento, o enriquecimento em Água Peptonada Alcalina (APA adicionada de 1 e 3% de NaCl, isolamento em Agar Tiossulfato Citrato Bile Sacarose (TCBS e confirmação das colônias típicas por análise bioquímica. Dentre as 12 espécies de Vibrio identificadas destacaram-se como de maior prevalência as espécies Vibrio alginolyticus, V. cholerae não-O1, V. parahaemolyticus, V. carchariae e Vibrio vulnificus. A relevância epidemiológica destes patógenos associada a casos de gastrenterite humana após consumo de mexilhões crus ou parcialmente cozidos, reforça a importância de alertar as autoridades de Vigilância Sanitária sobre sua presença na cadeia alimentar e seus riscos para a Saúde Pública.The microbiology analysis of mussels reflects the aquatic environment quality because these animals retain various pathogens such as Vibrionaceae family microorganisms in their organism. In the present investigation, we evaluated the presence of Vibrio spp. in mussels (in natura and precooked commercialized at an Experimental Station Mussel Culture in Jurujuba, Niterói, Rio de Janeiro. A total of 86 samples were analyzed using the enrichment in Alkaline Peptone Water (APW added to 1 and 3% of NaCl, isolated in Thiossulfate Citrate Bile Sucrose Agar (TCBS and confirmed that there were suspect colonies by biochemical tests. The results showed the identification of 12 different Vibrio species whereby Vibrio alginolyticus, V. cholerae non-O1, V. parahaemolyticus, V. carchariae and V. vulnificus were the prevalent species. The epidemiological relevance of these pathogens associated with cases of human gastroenteritis after in natura or precooked mussels show the need to alert Sanitary Officials about their presence in the food chain and their risks to Public Health.

  15. Aeromonas spp. e Plesiomonas shigelloides isoladas a partir de mexilhões (Perna perna in natura e pré-cozidos no Rio de Janeiro, RJ Aeromonas spp. and Plesiomonas shigelloides isolated from in natura and precooked mussels (Perna perna in Rio de Janeiro, RJ, Brazil

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    Christiane Soares Pereira

    2004-12-01

    Full Text Available O ecossistema aquático é o habitat de mexilhões (Perna perna, animais filtradores que refletem a qualidade ambiental através de análise microbiológica de sua carne. No presente trabalho avaliou-se a presença de patógenos emergentes (Aeromonas hydrophila e Plesiomonas shigelloides, em mexilhões in natura e pré-cozidos coletados por pescadores da Estação Experimental de Cultivo de Mexilhões situada em Jurujuba, Niterói, Rio de Janeiro. Foram analisadas 86 amostras de mexilhões (43 in natura e 43 pré-cozidos as quais foram submetidas a enriquecimento em Água Peptonada Alcalina (APA acrescida de 1 e 3% de Cloreto de Sódio (NaCl e em solução Salina de Butterfield, incubadas a 37ºC por 24 horas. Em seguida, foram semeadas em Ágar Seletivo para Pseudomonas-Aeromonas (GSP, Ágar Tiossulfato Citrato Bile Sacarose (TCBS e Ágar Inositol Bile Verde Brilhante (IBB. A análise geral dos resultados permitiu a identificação de Areomonas spp e Plesiomonas shigelloides em 86% das amostras de mexilhões in natura e pré-cozidas avaliadas. A posterior caracterização bioquímica permitiu a identificação das espécies Aeromonas media (37,10%, A. hydrophila (15,50%, A. caviae (14,80%, A. veronii biogrupo veronii (11,60%, Aeromonas sp. (7,36%, A. sobria (4,20%, A. trota (4,20%, A. schubertii (1,31%, A. jandaei (1,31%, A. veronii biogrupo sobria (0,52% e Plesiomonas shigelloides (2,10%. A relevância epidemiológica desses microrganismos em casos de gastrenterite humana, após consumo de mexilhões crus ou parcialmente cozidos, revela a importância de alertar as autoridades de Saúde Pública no Brasil, sobre a presença desses patógenos na cadeia alimentar e seus riscos para a saúde humana.The aquatic ecosystem is the habitat of mussels, filtrating animals that reflect the ambient quality through microbiological analysis. In the present investigation, we evaluated the presence of emergent pathogens (Aeromonas hydrophila and Plesiomonas shigelloides from in natura and pre-cooked mussels collected by workers at the Experimental Station Mussels Cultive situated in Jurujuba, Niteroi, Rio de Janeiro. A total of 86 mussels (43 each in natura and precooked were analyzed and the samples were submitted to enrichment in Alkaline Peptone Water (APW added of 1 and 3% Sodium Chloride (NaCl and Butterfield's Saline incubated at 37ºC for 24 hours. After, the samples were streaked onto Pseudomonas-Aeromonas Selective Agar (GSP, Thiossulfate Citrate Bile Sucrose Agar (TCBS and Inositol Brilliant Green Bile Salts Agar (IBB. Aeromonas spp and Plesiomonas shigelloides were isolated from 86% in natura and precooked mussels avaliated. The biochemical characterization showed strains of Aeromonas media (37.10%, A. hydrophila (15.50%, A. caviae (14.80%, A. veronii biogroupe veronii (11.60%, Aeromonas sp. (7.36%, A. sobria (4.20%, A. trota (4.20%, A. schubertii (1.31%, A. jandaei (1.31%, A. veronii biogroupe sobria (0.52%, and Plesiomonas shigelloides (2.10%. The epidemiological relevance of these microorganisms in cases of human gastroenteritis after mussels consumption without fully cooking reveal the importance to alert the Brazilian health authorities on the presence of these pathogens in food chain and the risks for human health.

  16. Colimetria de água marinha em áreas de cultivo e extrativismo de mexilhões no município de Niterói, RJ Coliform enumeration in mussel-growing waters from Niteroi city, RJ-Brazil

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    A.A. Pinheiro Jr.

    2002-08-01

    Full Text Available Analisaram-se amostras de água do mar de cinco pontos da Baía de Guanabara quanto ao número mais provável (NMP de coliformes totais e de Escherichia coli usando-se o método fluorogênico, e verificaram-se o pH, a salinidade e a temperatura dos locais de colheita. As contagens de E. coli nas amostras das estações Icaraí, Boa Viagem e Santa Cruz foram, em média, acima do previsto na legislação, enquanto que nas estações Piratininga e Rio Branco, 92,9% e 100% das amostras tiveram contagens de E. coli menor que 3/100ml. Observou-se relação positiva entre coliformes totais e E. coli, enquanto que a correlação entre colimetria, pH, salinidade e temperatura da água não foi significativa. Temperatura e pH mostraram pouca variação entre as estações, sendo as médias de salinidade, coliformes totais e E. coli semelhantes em Icaraí, Boa Viagem e Santa Cruz. Piratininga e Rio Branco apresentaram médias diferentes destas e semelhantes entre si. Os resultados em Icaraí, Boa Viagem e Santa Cruz indicam provável impropriedade para o cultivo e/ou extrativismo de mexilhões destinados ao consumo, enquanto que os de Piratininga e Rio Branco indicam provável propriedade para a instalação de cultivo de mexilhões ou mesmo para depuração natural de mexilhões cultivados em águas contaminadas.Water samples from five different sites on Guanabara Bay (Icaraí, Boa Viagem, Santa Cruz, Piratininga, and Rio Branco were analyzed for estimated numbers of coliform and Escherichiacoli. Water pH, salt concentration, and temperature were measuredin the sampling place. E.coli countings for samples collected in Icaraí, Boa Viagem, and Santa Cruz were usually higher than the values legallyaccepted by the Brazilian Ministry of Agriculture. In Piratininga and Rio Branco, respectively, 92.3% and 100% of the sampleshad countings of lessthan 3 E.coli/100ml. A significant correlation was found between total coliforms and E. coli countings. The average water temperature and pH were equal in the investigated sites. By contrast, water salinity, total coliforms, and E. coli counts were statistically equal in Icaraí, Boa Viagem, and Santa Cruz, but different when compared to samples collected in Piratininga and Rio Branco. Nevertheless, samples collected in Piratininga and Rio Branco were statistically similar in these two sites. Results indicate that water from Icaraí, Boa Viagem, and Santa Cruz are unsuitable for cultivating and/or harvesting bivalves for human consumption.

  17. Parasitóides associados às moscas-das-frutas (Diptera: Tephritoidea em café orgânico com e sem arborização em Valença, RJ, Brasil Parasitoids associated with fruit flies (Diptera: Tephritoidea in organic coffee plantation under shaded and unshaded management in Valença, RJ, Brazil

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    Elen de Lima Aguiar-Menezes

    2008-12-01

    Full Text Available Objetivou-se, com esse trabalho, determinar as espécies de parasitóides associados às moscas-das-frutas infestando seis cultivares de café arábica (Coffea arabica L., em sistema de cultivo com e sem arborização, sob manejo orgânico. Uma amostra de 1 kg de frutos maduros por cultivar foi colhida em maio de 2005. Os frutos foram depositados em bandejas plásticas, contendo uma camada de areia, a qual serviu como substrato para a fase de pupa. Os pupários foram quantificados e mantidos em copos plásticos transparentes com areia até a emergência dos insetos. Sete espécies de parasitóides da ordem Hymenoptera foram identificadas, das quais cinco da família Braconidae: Asobara anastrephae (Muesebeck, Doryctobracon areolatus (Szépligeti, Utetes anastrephae (Viereck, Opius bellus Gahan e Opius sp., e duas da Figitidae: Aganaspis pelleranoi (Brèthes e Lopheucoila anastrephae Weld. Larvas de Tephritidae e Lonchaeidae infestando frutos dos seis cultivares foram parasitadas por Braconidae e Figitidae, com média de 14,2% e 7,7% nos sistemas sem e com arborização, respectivamente.The aim of this work was to determine the parasitoid species associated with fruit flies infesting six cultivars of arabic coffee under shaded and unshaded organic management. A 1kg-sample of maturing fruits per cultivar was harvested in May 2005. The fruits were placed in plastic trays containing a layer of thin sand, as a substrate for pupa phase. The puparia were quantified and kept in transparent plastic cups with sand until the emergence of the insects. Seven parasitoid species of the order Hymenoptera were identified, from which five belong to the family Braconidae: Asobara anastrephae (Muesebeck, Doryctobracon areolatus (Szépligeti, Utetes anastrephae (Viereck, Opius bellus Gahan and Opius sp., and two of the Figitidae: Aganaspis pelleranoi (Brèthes and Lopheucoila anastrephae Weld. Larvae of Tephritidae and Lonchaeidae infesting fruits of the six cultivars were parasitized by Braconidae and Figitidae, with an average of 14.2% and 7.7% in the unshaded and shaded systems, respectively.

  18. Effect of differents baits as attractant for blowflies (diptera at Valonguinho, Universidade Federal Fluminense, Niterói, RJ, Brazil Efeito de diferentes iscas na atração de califorídeos (diptera no campus do Valonguinho, Universidade Federal Fluminense, Niterói, RJ, Brasil

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    José M. D'almeida

    2007-12-01

    Full Text Available It was carried out a survey of blowflies in a área of the Campus (Valonguinho of the Universidade Federal Fluminense, Niterói, Rio de Janeiro. The collections were performed with traps, using baits of fish (sardine, bovine liver, shrimps and banana. Were collected 6015 flies, Chrysomya megacephala and Lucilia eximia were the most frequent (50.55% and 21.52%, respectively. The flies were more abundant in February and March and the most attractive bait was fish (38.32%.Foi realizado um estudo sobre califorideos no Campus do Valonguinho, Universidade Federal Fluminense. A pesquisa foi efetuada de dezembro de 2003 a novembro de 2004, com coletas feitas com armadilhas utilizando iscas à base de peixe (sardinha, fígado bovino, camarão e banana. Foram coletados 6015 califorideos, Chrysomya megacephala e Lucilia eximia foram as mais freqüentes (50,55% e 21, 52%, respectivamente. A isca mais atrativa foi peixe (38,32% com picos populacionais em fevereiro e março.

  19. Ocorrência e tratamento de sarna knemidocóptica (Knemidokoptes sp. em aves de companhia atendidas na Faculdade de Veterinária da Universidade Federal Fluminense, RJ, Brasil Occurrence and treatment of knemidocoptic mange (Knemidokoptes sp. in pet birds company cared at the Veterinary Medicine College - Universidade Federal Fluminense, RJ, Brazil

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    Sávio Freire Bruno

    2008-08-01

    Full Text Available A sarna knemidocóptica ocasionada pelo ácaro Knemidokoptes sp. pode ser considerada uma enfermidade de caráter relevante na rotina clínica aviária. Este trabalho tem como objetivo relatar a ocorrência da sarna knemidocóptica em aves de companhia atendidas no Setor de Animais Selvagens da Faculdade de Veterinária da Universidade Federal Fluminense (UFF, ressaltando as principais espécies acometidas e a eficácia do tratamento clínico estabelecido. No período entre janeiro de 2000 e junho de 2006, 374 aves foram atendidas no Setor; 25 delas eram portadoras de ectoparasitos, das quais 68% (n=17 com diagnóstico de sarna knemidocóptica. As lesões associadas à presença do Knemidokoptes sp. ocorreram principalmente na região dos pés em 14 aves (82,4%, sendo os Passeriformes (Serinus canarius os mais acometidos com 14 casos (82,4%, seguidos de três casos (17,7% em Psitaciformes (Melopsittacus undulatus. Os sinais clínicos constituíram-se de lesões hiperqueratosas e deformidade de dígitos. A confirmação do diagnóstico foi realizada por meio, da identificação microscópica do ácaro a partir de raspado cutâneo da área infestada. Em 15 pacientes portadores da sarna knemidocóptica, entre Passeriformes e Psitaciformes, administrou-se pomada composta por sulfureto de potássio 3g 100g-1 e carbonato de potássio 3g 100g-1 associados uma vez ao dia, em dias alternados, por quatorze dias. Apenas dois pacientes (11,8% foram tratados com aplicação tópica de solução à base de benzoato de benzila 25%, na mesma freqüência e duração do tratamento anterior. Foi intercalado o uso de óleo mineral puro 100%, aplicado topicamente duas vezes ao dia, em ambos os tratamentos. Nos casos mais graves (três pacientes, associou-se ao tratamento 0,06ml de ivermectina 1% pour on em dose única. Os pacientes submetidos a esses tratamentos obtiveram em sua totalidade a cura clínica.Knemidocoptic mange caused by Knemidokoptes sp. can be considered an important disease in the birds. The purpose of this paper is to describe the occurrence and treatments of pet birds cared at the Wild Animals Sector of the Veterinary Medicine College - Universidade Federal Fluminense, with emphasis on the species most commonly affected and the efficiency of its treatment. Between January 2000 and June 2006, 374 birds were cared and 25 cases of ectoparasitosis were diagnosed. The prevalence of knemidocoptic mange was of 68% (n= 17. Cutaneous lesions on the feet and legs occurred in 14 cases (82.4%. The Passeriformes (Serinus canarius were most affected with 14 cases (82.4%, followed by three cases (17.7% in Psittaciformes (Melopsittacus undulatus. Hyperkeratotic skin lesions with deformity of digits were observed. The skin scraping examination confirmed the diagnosis of knemidocoptic mange. The treatment of knemidocoptic mange on 15 birds among Passeriformes and Psittaciformes, was done with sulphide carbonate 3g 100mg-1 and potassium carbonate 3g 100mg-1 applied to them every other day, for two weeks. Only two patients (11.8% were treated with topical application of benzyl benzoate solution 25% in the same frequency and duration of the previous treatment. Mineral oil 100% was used twice a day directly on the lesions alternating with the other treatments. Three patients showed severe knemidocoptic lesions that were associated with a single dose (0.06ml of ivermectin 1% pour on. The patients submitted to these treatments reached clinical cure in 100% of the cases.

  20. Geochemical signature and properties of sediment sources and alluvial sediments within the Lago Paranoá catchment, Brasilia DF: a study on anthropogenic introduced chemical elements in an urban river basin.

    Science.gov (United States)

    Franz, C; Makeschin, F; Weiß, H; Lorz, C

    2013-05-01

    One of the largest urban agglomerations in Brazil is the capital Brasilia and its surrounding area. Due to fast urban sprawl and accelerated land use changes, available water supplies are near their limits. The water supply depends largely on surface water collected in reservoirs. There are increasing concerns regarding water shortages due to sediment aggradations, and of water quality due to geochemical modification of sediments from human activities. The concentration of 18 chemical elements and five sediment properties was analyzed from different potential land-based sediment sources and deposited alluvial sediment within the Lago Paranoà catchment. The goal of this study was to assess the distribution of chemical elements and geochemical/physical properties of potential sediment sources in the Lago Paranoá catchment. Principal component analysis and hierarchical cluster analysis were used to investigate the influence of different land use types on the geochemistry of sediments. Geochemical fingerprints of anthropogenic activities were developed based on the results of the cluster analysis grouping. The anthropogenic input of land use specific geochemical elements was examined and quantified by the calculation of enrichment factors using the local geological background as reference. Through comparison of the geochemical signature of potential sediment sources and alluvial sediments of the Lago Paranoá and sub-catchments, the relative contribution of land use specific sediment sources to the sediment deposition of the main water reservoir were estimated. The existing findings suggest a strong relationship between land use and quantifiable features of sediment geochemistry and indicate that urban land use had the greatest responsibility for recent silting in the Lago Paranoá. This assessment helps to characterize the role of human activities in mixed-used watersheds on sediment properties, and provides essential information to guide management responses

  1. Upward Lightning in Brazil

    Science.gov (United States)

    Schumann, C.; Saba, M. M.; Alves, J.; Warner, T. A.; Albrecht, R. I.; Bie, L. L.

    2012-12-01

    Observations of upward lightning from tall objects have been reported since 1939. Interest in this subject has grown recently, some of it because of the rapid expansion of wind power generation. Also, with the increasing number of tall buildings and towers, there will be a corresponding increase in the number of upward lightning flashes from these structures. Reports from recent field observations are beginning to address the nature of upward lightning initiation, but much still needs to be learned. Examples are studies of upward lightning from towers in winter thunderstorms in Japan (Wang and Takagi, 2010; and Lu et al., 2009) and summer thunderstorms in Europe (Miki et al., 2005; Flache et al., 2008; and Diendorfer et al., 2009; Zhou et al., 2011) and in North America (Mazur and Ruhnke, 2011; Hussein et al., 2011; Warner, 2011, and Warner et al., 2011). Up to January 2012, no upward flash had ever been registered in Brazil. With the help of some video cameras, we recorded 15 upward lightning which started from one of the towers located on Peak Jaraguá in the city of São Paulo. This paper describes the first results of this field campaign. A combination of high-speed video and standard definition video were used to record upward lightning flashes from multiple towers in Sao Paulo, Brazil, a city located in southeastern Brazil with a population over 10 million people, an average elevation of around 800 meters above sea level, and a flash density of 15 flashes/km2/year. Observations of 15 upward flashes made with these assets were analyzed along with BrasilDAT Lightning Detection Network and a lightning mapping array (LMA) and electric field sensors.

  2. A construção da autoridade entre os donos de barco no Aventureiro, Ilha Grande - RJ: uma etnografia das relações de poder

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    Gustavo Villela Lima da Costa

    2011-12-01

    Full Text Available Este artigo propõe analisar a articulação entre as esferas de poder local e o poder público, a partir de uma descrição etnográfica da organização social e de como, nesta, se estrutura a autoridade política local. Nesse processo de construção da autoridade local, na praia do Aventureiro, Ilha Grande - RJ, o poder político e a autoridade legitimada pelos moradores estão diretamente ligados à posse dos barcos e dos campings mais prósperos. Os donos de barco no Aventureiro assumem, nesse contexto, o papel de representantes legítimos do povoado na negociação com órgãos da Prefeitura e do Estado, na defesa dos direitos dos moradores, assumindo um papel de representação da organização doméstica (em famílias e grupos vicinais nas relações políticas com o Estado.This paper proposes, from an ethnographic description of social organization and how it structures the local political authority, to analyze the connections between local power and public administration through the building of local authority at Aventureiro Beach, Ilha Grande, state of Rio de Janeiro. The inhabitants' political power and legitimate authority are connected to the ownership of boats and to the most successful campings. The boat owners take the role of legitimate at the negotiation with the municipality and state, looking after the inhabitants' rights, assuming a role in representing the domestic organization (families and vicinal groups in political relations with the state.

  3. URBANIZAÇÃO EFETIVA E DENSIDADE DE DOMICÍLIOS NA REGIÃO OCEÂNICA DE NITERÓI (RJ ENTRE 1976 E 2010

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    Thiago Henriques Fontenelle

    2013-03-01

    Full Text Available A Região Oceânica do município de Niterói (RJ tem sido objeto de intensa especulação imobiliária nas últimas décadas, associando o ideário de paisagens naturais e qualidade de vida a um modelo de habitações predominantemente voltado para população de alto padrão aquisitivo. Neste sentido, este trabalho objetiva analisar a expansão tanto do perímetro urbano como da densidade de domicílios da região no período entre 1976 e 2010, associando ainda a situação atual com o zoneamento urbano-ambiental vigente. A análise histórica, a geoestatística e um conjunto variado de geotecnologias foram as principais ferramentas utilizadas para produção e análise de dados. Em conjunto com estas ferramentas, é proposta uma metodologia alternativa de tratamento de dados censitários e avaliação de densidades de domicílios por unidade de área. Os resultados demonstram o crescimento de 112% da área urbanizada da Região Oceânica, enquanto o número de domicílios cresceu na ordem de 600%, remontando ao processo interligado de avanço tanto via expansão em área quanto via aumento de densidade. Em comparação com o zoneamento, há esgotamento para incorporação de novas áreas perimetrais, o que aponta para um aprofundamento ainda maior do aumento de densidades demográficas nas próximas décadas assim como da pressão sobre os geossistemas costeiros.

  4. Aplicação da modelagem matemática para estudo do crescimento populacional de Seropédica - RJ

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    Maurício de Carvalho

    2015-12-01

    Full Text Available A modelagem matemática deste trabalho se dá por meio da teoria de equações diferenciais, que é muito rica devido à sua aplicação em diversos problemas reais modelados e resolvidos nas áreas de engenharia, física e matemática, além de outras áreas. Primeiramente, adotou-se um modelo de crescimento clássico dessa teoria e cuja equação diferencial é linear e de primeira ordem. Posteriormente, um segundo modelo – mais preciso – foi também estudado, porém com utilização de uma equação diferencial não linear. A grande diferença entre os dois métodos, fora sua precisão, está em como calcular as constantes indeterminadas da solução de cada modelo. Na primeira, usa-se uma simples regressão linear com duas variáveis a serem determinadas, porém na outra, mesmo sendo possível aplicar igual método, usamos uma regressão não linear com três variáveis a serem determinadas. Com esta solução em mãos e com a utilização de dados fornecidos pelo Instituto Brasileiro de Geografia e Estatística (IBGE, é possível estimar a taxa de crescimento ou decrescimento, assim como o comportamento da população de Seropédica - RJ.

  5. Técnicas de geoprocessamento e sensoriamento remoto aplicadas na identificação de conflitos do uso da terra em Seropédica-RJ

    Directory of Open Access Journals (Sweden)

    Kaio Allan Cruz Gasparini

    Full Text Available Este trabalho avaliou o uso e a cobertura da terra, e comparou os dados obtidos com aqueles das Áreas de Preservação Permanente (APPs, para identificar conflitos do uso da terra no município de Seropédica-RJ. Utilizaram-se duas cenas do satélite CBERS2 e a classificação supervisionada com o método da mínima distância. As APPs foram delimitadas com o auxílio de geotecnologias, baseando-se na legislação ambiental (Lei n.º 12.651/2012 (Brasil, 2012. Utilizou-se no mapeamento das APPs um Modelo Digital de Elevação (1:25.000 e, para a rede de drenagem, cartas planialtimétricas (1:10.000. Identificaram-se 40,02 km² de APPs, o que correspondeu a 15,01% do município. A APP do rio Guandu apresentou maior área (7,23% e lagos urbanos, a menor (0,04%. O município não apresentou APPs de declividade (<40° e de topo de morro (declividade < 25° com altitude < 100. Em relação aos conflitos do uso da terra, o solo exposto correspondeu a 58,1%, pastagem a 21,7%, areia/mineração a 7,8% e área urbana a 3,9%. Os resultados obtidos indicam eficiência dessas geotecnologias na gestão municipal.

  6. Matéria orgânica de horizontes superficiais em topolitossequências em ambiente de Mar de Morros, Pinheiral, RJ

    Directory of Open Access Journals (Sweden)

    Ademir Fontana

    Full Text Available O objetivo deste trabalho foi quantificar o carbono orgânico e as frações húmicas de horizontes superficiais de perfis de solo em três topolitossequências no ambiente de Mar de Morros, no município de Pinheiral, RJ. Foram selecionadas as topolitossequências: T1 (basalto, T2 (muscovita-biotita-gnaisse e T3 (gabro. Os horizontes superficiais de 14 perfis de solo, sob cobertura de pastagem (T1 e T3 e pastagem mista não manejada e leguminosa (pasto sujo/capoeira (T2, foram descritos e coletados para análises químicas, físicas e do teor de carbono nas frações húmicas. Os teores de carbono orgânico variaram de acordo com o material de origem e decrescem na seguinte ordem: T3 > T1 > T2. Os teores de carbono orgânico aumentam do topo para a várzea na T1, ocorrendo o inverso na T3 e sem um padrão definido na T2. A fração humina predominou em todos os perfis de solo das topolitossequências e foi seguida pela fração ácidos fúlvicos na T1 e de forma equitativa entre as frações ácidos fúlvicos e ácidos húmicos na T2 e T3. Considerando o ambiente similar em termos da vegetação original e o uso agrícola, as mudanças no carbono do solo e nas frações húmicas podem refletir as interações com os componentes minerais e processos pedogenéticos, influenciados pelo material de origem e o relevo.

  7. Social Psychotherapy in Brazil.

    Science.gov (United States)

    Fleury, Heloisa J; Marra, Marlene M; Knobel, Anna M

    2015-10-01

    This paper describes the practice of sociodrama, a method created by J. L. Moreno in the 1930s, and the Brazilian contemporary socio-psychodrama. In 1970, after the Fifth International Congress of Psychodrama was held in Brazil, group psychotherapy began to flourish both in private practice and hospital clinical settings. Twenty years later, the Brazilian health care system added group work as a reimbursable mental health procedure to improve social health policies. In this context, socio-psychodrama became a key resource for social health promotion within groups. Some specific conceptual contributions by Brazilians on sociodrama are also noteworthy.

  8. Optically stimulated luminescence and isothermal thermoluminescence dating of high sensitivity and well bleached quartz from Brazilian sediments: from Late Holocene to beyond the Quaternary?

    Directory of Open Access Journals (Sweden)

    André Oliveira Sawakuchi

    Full Text Available ABSTRACT: The development of optically stimulated luminescence (OSL dating of sediments has led to considerable advance in the geochronology of the Quaternary. OSL dating is a well established technique to determine sediment burial ages from tens of years to few hundred thousand years. Recent studies have shown that Quaternary sediments of Brazil are dominated by quartz grains with high luminescence sensitivity, allowing the determination of precise and reliable OSL burial ages. In this paper, we show examples of OSL dating of quartz aliquots and single grains from different regions in Brazil, including young coastal-eolian Late Holocene ( 2 Ma in the low dose rate (0.5 - 1.0 Gy/ka environments typical for Brazilian sediments.

  9. Sediment Geo-Probe System

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Provides wideband in situ measurement capability of compressional wave speed and attenuation and their spatial variability in marine sediments.DESCRIPTION:...

  10. Glacimarine environments: processes and sediments

    National Research Council Canada - National Science Library

    Dowdeswell, J. A; Scourse, James D

    1990-01-01

    .... Sediments released from glaciers grounded in tidewater, floating ice shelves, ice tongues, icebergs and sea ice form complex sequences governed by glaciological, oceanographic, sedimentary and biogenic controls...

  11. Heavy metals in a latin american coastal lagoon - sediments, water and macrophytes

    OpenAIRE

    Ambrozic, Nada

    2015-01-01

    Dissertação de mestrado, Ecohidrologia, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015 Coastal lagoons are considered to be some of the most productive ecosystems on Earth, providing a wide range of ecosystem services and resources. Jacunem lagoon, ES, Brazil, was studied to evaluate the impact of anthropogenic activities on heavy metal concentrations in sediments, water and macrophytes (Eichhornia crassipes and Typha domingensis). In order to verify the presence of heav...

  12. Intertidal to subtidal distribution of benthic macrofauna in an estuarine beach of Babitonga Bay, southern Brazil

    Directory of Open Access Journals (Sweden)

    Paulo Roberto Pagliosa

    2006-03-01

    Full Text Available This paper reports on the spatial variation of a macrofaunal community along the intertidalsubtidal gradient of an estuarine beach located at the mouth of Babitonga Bay, in Southern Brazil. The fauna and sediment were sampled at 0, 5, 10, and 20 m depths in three transects. Differences in benthic assemblages among the depths were found to be significant and related to the major local processes of sediment changes. The analysis of taxa composition showed an impoverished community subject to wave action and erosionaccretion dynamics at landward stations (0 and 5 m depths. Seaward macrofauna (10 and 20 m depths inhabiting sediments with higher organic content and poorly-sorted sands were more diverse and numerically dominated by ophiuroids and by cirratulid (Tharyx sp. and maldanid (Clymenella brasiliensis polychaetes. A breakdown in the zonation patterns of environment and community was detected where sediments produced by a creek outlet enabled increasing stability and higher densities of the soft bottom anthozoa Edwardsia sp. and the polychaete Lumbrineris atlantica. Additionally, the sediments with an excessive amount of fine particles were densely colonized (mean of 22,400 individuals.m-2 by C. brasiliensis. The local sediment characteristics were related to maldanid sediment-reworking. The macrofaunal species compositions along the sandy beaches at the mouths of the southern Brazilian estuarine systems were compared.

  13. Climate variability, soil conservation, and reservoir sedimentation

    Science.gov (United States)

    Rivers carry sediments which, upon entering a reservoir, settle to the bottom. The process of deposition and gradual accumulation of sediments in the reservoir is referred to as reservoir sedimentation. As reservoir sedimentation progresses, the storage capacity allocated for sediment deposition wil...

  14. Heparin pharmacovigilance in Brazil.

    Science.gov (United States)

    Junqueira, Daniela Rezende Garcia; Viana, Thércia Guedes; Peixoto, Eliane R de M; Barros, Fabiana C R de; Carvalho, Maria das Graças; Perini, Edson

    2011-01-01

    To investigate the biological origin of injectable unfractioned heparin available in Brazilian market by discussing the impact of the profile of commercial products and the changes in heparin monograph on the drug safety. The Anvisa data base for the Registered Products of Pharmaceutical Companies and the Dictionary of Pharmaceutical Specialties (DEF 2008/2009) were searched. A survey with industries having an active permission for marketing the drug in Brazil was conducted. Five companies were granted a permission to market unfractioned heparin in Brazil. Three of them are porcine in origin and two of them are bovine in origin, with only one explicitly showing this information in the package insert. The effectiveness and safety of heparin studied in non-Brazilian populations may not represent the Brazilian reality, since most countries no longer produce bovine heparin. The currently marketed heparin has approximately 10% less anticoagulant activity than that previously produced and this change may have clinical implications. Evidence about the lack of dose interchangeability between bovine and porcine heparins and the unique safety profile of these drugs indicates the need to follow the treatment and the patients' response. Events threatening the patient's safety must be reported to the pharmacovigilance system in each particular country.

  15. Region of Southern Brazil

    Directory of Open Access Journals (Sweden)

    Marcelo Moreno

    2012-01-01

    Full Text Available Cutaneous melanoma (CM is responsible for 75% of deaths from malignant skin cancer. The incidence of CM in the southern region of Brazil, particularly in the western region of Santa Catarina, is possibly higher than estimated. In this study, the clinical and epidemiological profile of patients with CM treated in the western region of Santa Catarina was examined. A cross-sectional study was performed with patients diagnosed with CM from January 2002 to December 2009, from 78 counties of the western region of the state of Santa Catarina. Data were collected using a protocol adapted from the Brazilian Melanoma Group and 503 patients were evaluated. The incidence and prevalence of CM found in this region are much higher than those found elsewhere in the country. This fact is most likely due to the phenotypic characteristics of the population and the high incidence of UV radiation in this region due to its location in southern Brazil, as is the case in the countries of Oceania.

  16. CIVIL JUSTICE IN BRAZIL

    Directory of Open Access Journals (Sweden)

    T. A.A. Wambier

    2016-01-01

    Full Text Available This study deals in a succinct way with the Brazilian model of civil procedural law. There is an historical approach specifically about Portuguese law which was in force in Brazil at the beginning (until 1832, after what there comes a brief description of the judiciary structure (courts and judges and only then we talk about the scope of civil procedure, its fundamental principles and, in a “law in practice” approach, access to justice. The role of a judge towards deciding “according to statutes and evidence” is analysed and the current importance of case law is deeply focused, mainly according to the new CPC (in force since 2015 and so are appellate proceedings, class actions, enforcement proceedings and ADR. The last items concern the role and the importance of academia, and some interesting cultural observations, where we deal with the very serious crisis, both ethical and economic, that Brazil is living now, in the political sphere. The judiciary branch is now our only hope.

  17. Metal and trace element sediment assessment from two estuarine systems: Santos/Sao Vicente and Cananeia, State of Sao Paulo, Brazil; Avaliacao da concentracao de metais e outros elementos de interesse em amostras de sedimentos dos estuarios de Santos/Sao Vicente e Cananeia, estado de Sao Paulo, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Amorim, Eduardo Paulo de

    2012-07-01

    This study evaluated some toxic metals such as Cd, Hg and Pb and some other major and trace elements in surface sediment samples, from two different systems under different degrees of anthropogenic actions: the estuarine system of Santos/Sao Vicente and the southern part of the Cananeia estuary, both on the Sao Paulo state coast. Sediment samples were collected in 16 stations in the Santos/Sao Vicente estuary and 13 stations in the Cananeia estuary, during summer and winter of 2005 and 2006, in both estuaries. Three analytical techniques were used: NAA, AAS and ICP OES. NAA was used for the quantification of major element concentration levels (Ca, Fe and Na), trace elements (As, Ba, Br, Cd, Co, Cu, Cr, Cs, Hf, Rb, Sb, Sc, Se, Ta, Th, U, and Zn and rare earths elements La, Ce, Eu, Nd, Sm, Lu, Tb, Yb). ICP OES was used for determination of the concentration levels of Al, Ba, Be, Bi, B, Cd, Co, Pb, Cu, Cr, Sn, Sr, Fe, Li, Mn, Mo, Ni, Tl, Ti, V and Zn. AAS for Cd and Pb quantification through graphite furnace (GF AAS) and Hg through cold vapor generation (CV AAS). Methodology validation according to precision and accuracy was performed by reference material analyses for the three analytical techniques used. Detection and quantification limits were calculated for each element evaluated. Seasonal variations (summer and winter), spatial and temporal (2005 e 2006) variations of metals and trace elements were also evaluated. In the Santos estuary, in general, metal and trace element concentrations , organic matter content and % of pelitic fraction found in the Santos channel (area 1) were higher than those of the Santos Bay (area 2) and Sao Vicente channel (area 3). Area 1 suffers high impact from industrial activities from the Cubatao region and Santos port. The sediments from station 14 (area 3, Sao Vicente channel), showed the same behavior of those from area 1, suffering influence from the industrial pole and located in a mangrove area. In comparison with TEL and PEL

  18. Anthropogenic impact on the sedimentation in coastal regions: an example in Saco do Bracui - Ribeira Bay, Angra dos Reis, Brazil; O impacto antropogenico sobre a sedimentacao em regioes costeiras: um exemplo no Saco do Bracui - Baia da Ribeira, Angra dos Reis, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Alayde Alfaia

    2001-07-01

    The Saco do Bracui, located in the littoral zone of the Brazilian southeast, receives run off from the region of Angra dos Reis. Anthropological intervention in this area has modified local morphology during the last 40 years. These modifications include an intense deforestation of mangrove regions, construction of the Bracui Boat Yard, the dredging of part of the draining basin and development of the coastal plain. Results from seismic surveys identify three different stratigraphic units separated by two reflectors as well as Holocenic paleodeltas and paleochannels of the Bracui and Gratau rivers. Results from this study and previous work indicate an age of 6800 years for the top of the superior unit. Areal photographs from the years 1964, 1965, 1978 and 1991 reveal the principal modifications occurring during the last 40 years in the area. Field observations from this study as well as bathymetric profiles based on the nautical maps of 1980 and 1944 reveal shoaling and erosion areas in the Saco do Bracui. Sedimentation rates, using lead-210 profiles, are between 0,17 - 1,90 cm/year and lead-210 inventory values are between 16-6-dpm/cm{sup 2}/year. The results for sedimentation rate and inventory show a high accumulation around Bracui, Gratau and Frade mouth rivers and agree with results from the bathymetric profiles with respect to the site of erosion and shoaling in the Saco do Bracui. The results for grain size and lead-210 analyses support the idea that the Saco do Bracui is suffering shoaling processes in specific sites and erosion in others. Comparison between long term sedimentation rates obtained by seismic results and short term rates obtained by lead-210 shows an increase of the sedimentary discharge in the 1960's, when the intense anthropological intervention in the area began. (author)

  19. Prediction of sediment load by sediment rating curve and neural ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Earth System Science; Volume 122; Issue 5. Prediction of sediment load by sediment rating curve and neural network (ANN) in El Kebir catchment, Algeria. Z A Boukhrissa K Khanchoul Y Le Bissonnais M Tourki. Volume 122 Issue 5 October 2013 pp 1303-1312 ...

  20. Optical sedimentation recorder

    Science.gov (United States)

    Bishop, James K.B.

    2014-05-06

    A robotic optical sedimentation recorder is described for the recordation of carbon flux in the oceans wherein both POC and PIC particles are captured at the open end of a submersible sampling platform, the captured particles allowed to drift down onto a collection plate where they can be imaged over time. The particles are imaged using three separate light sources, activated in sequence, one source being a back light, a second source being a side light to provide dark field illumination, and a third source comprising a cross polarized light source to illuminate birefringent particles. The recorder in one embodiment is attached to a buoyancy unit which is capable upon command for bringing the sedimentation recorder to a programmed depth below the ocean surface during recordation mode, and on command returning the unit to the ocean surface for transmission of recorded data and receipt of new instructions. The combined unit is provided with its own power source and is designed to operate autonomously in the ocean for extended periods of time.

  1. Modelling the population control of the domestic cat: an example from an island in Brazil

    Directory of Open Access Journals (Sweden)

    ICM Lessa

    Full Text Available The domestic cat is an invasive species that often causes great impacts where introduced due to its high predatory and reproductive potential, especially on islands. In this study, carried out on Ilha Grande (RJ, Brazil, we aimed to: i estimate the population density of domestic cats, ii calculate the number of animals preyed upon annually by domestic cats, and iii evaluate the efficiency of methods to control the cat population. We used the Vortex program to project the population growth of domestic cats in fifty years, and simulated different scenarios of population control (without control, castration, spay and harvest. Population density of owned cats was 662 cats/km². The annual predation rate was 1.97 prey animals/cat which is an average of 1497.96 prey/year. The population would only be reduced if 70% of females were spayed or removed annually. Measures to control the domestic cat population must be undertaken urgently, since uncontrolled growth of this predator has the potential to seriously impact the biodiversity of Ilha Grande.

  2. Diagnosis of first stage larvae of gastrointestinal nematodes of dairy calves in the city of Paty do Alferes-RJ/ Diagnóstico de larvas de primeiro estágio de nematóides gastrintestinais de bezerros leiteiros do município de Paty do Alferes – RJ

    Directory of Open Access Journals (Sweden)

    Argemiro Sanavria

    Full Text Available An epidemiologycal survey were carried out using the filter of Visser technique for the diagnosis of first-stage larvae (L1 of gastrointestinal nematodes in faecal samples from 150 dairy calves in Paty do Alferes city, Rio de Janeiro state. Feces were individually collected directly of the rectal flask of 150 calves, with age varying between three and 12 months, coming from 15 rural properties in the municipal district Paty do Alferes-RJ. The following genera of nematodes were identified: Haemonchus spp, Trichostrongylus spp., Cooperia spp., Bunostomum spp., Strongyloides and Oesophagostomum spp. The genera of greater occurrence were Cooperia spp. (54%, Haemonchus spp. (50.6% and Trichostrongylus spp. (48.7%. Of the total of inspected properties, 86.7% presented positive animals for Haemonchus spp. and Trichostrongylus spp. The genera Bunostomum spp. had presented smaller occurrence, with 12,7% of cases. The genera identified with the highest medium values of first-stage larvae in 15mL of faeces were: Cooperia spp. (812 and Haemonchus spp. (489. Foi realizado um levantamento epidemiológico utilizando-se a técnica coproparasitologica do filtro de Visser para o diagnóstico de larvas de primeiro estágio (L1 de nematóides gastrintestinais em amostras fecais de 150 bezerros leiteiros do município de Paty do Alferes, estado do Rio de Janeiro. Amostras individuais de fezes foram coletadas diretamente da ampola retal de 150 bezerros, com idade variando entre três e 12 meses, procedentes de 15 propriedades rurais no município de Paty do Alferes-RJ. Destas amostras, foram identificados os seguintes gêneros de nematóides: Haemonchus spp., Trichostrongylus spp., Cooperia spp., Bunostomum spp., Strongyloides e Oesophagostomum spp. Os gêneros de maior ocorrência foram Cooperia spp. (54%, Haemonchus spp. (50,6% e Trichostrongylus spp. (48,7%. Do total de propriedades vistoriadas, 86,7% apresentaram animais positivos para Haemonchus spp. e

  3. Caracterização de massa cerâmica vermelha utilizada na fabricação de tijolos na região de Campos dos Goytacazes - RJ Characterization of red ceramic body used in the production of bricks in the region of Campos dos Goytacazes - RJ

    Directory of Open Access Journals (Sweden)

    C. M. F. Vieira

    2000-03-01

    Full Text Available O objetivo deste trabalho é caracterizar uma mistura de argilas utilizada na fabricação de tijolos na região de Campos dos Goytacazes-RJ. Com isso, é possível avaliar a possibilidade de aplicação desta massa na fabricação de outros produtos com maior valor agregado, como por exemplo telhas e revestimentos cerâmicos. Foram realizadas análises de composição química, difração de raios-X, análise térmica diferencial/(ATD, análise termogravimétrica (ATG, análise granulométrica e determinação de propriedades físico-mecânicas em função da temperatura de queima. Os resultados demonstraram que a massa cerâmica estudada é apropriada para a fabricação de tijolos maciços e blocos de vedação. Entretanto, para a fabricação de telhas e revestimentos cerâmicos é necessário trabalhar a formulação da massa para a obtenção de propriedades de acordo com as normas técnicas em vigor.The objective of this paper is to characterize a mixture of clays in the area of Campos dos Goytacazes-RJ used in the fabrication of bricks. It makes possible to evaluate the possibility of application of this body in the production of others products with greater aggregate value, as roof tiles, wall and floor tiles. In this work were realized the following tests: chemical composition, differential thermal analysis(DTA, thermogravimetric analysis(TGA, particle size distribution analysis and determination of physical-mechanical properties in function of the temperature of it burns. The results demonstrated that the ceramic body studied is appropriate for the production of massive and walled bricks. However to manufacture roof tiles, floor and wall tiles it is necessary to manipulate the body formulation to obtain the of properties in agreement with technical norms in use.

  4. Brazil-U.S. Relations

    Science.gov (United States)

    2010-03-05

    component to poverty in Brazil. People of African descent in Brazil, also known as Afro - Brazilians, represent roughly 45% of the country’s...Security & Strategic Review, January 2008. 70 Guila Flint, “Jobim alerta para ameaça de atentados e diz que país deve se preparar para problemas durante...in Brazil, also known as Afro -Brazilians, represent 45% of the country’s population, but constitute 64% of the poor and 69% of the extreme poor.106

  5. Sediment flux and the Anthropocene.

    Science.gov (United States)

    Syvitski, James P M; Kettner, Albert

    2011-03-13

    Data and computer simulations are reviewed to help better define the timing and magnitude of human influence on sediment flux--the Anthropocene epoch. Impacts on the Earth surface processes are not spatially or temporally homogeneous. Human influences on this sediment flux have a secondary effect on floodplain and delta-plain functions and sediment dispersal into the coastal ocean. Human impact on sediment production began 3000 years ago but accelerated more widely 1000 years ago. By the sixteenth century, societies were already engineering their environment. Early twentieth century mechanization has led to global signals of increased sediment flux in most large rivers. By the 1950s, this sediment disturbance signal reversed for many rivers owing to the proliferation of dams, and sediment load reduction below pristine conditions is the dominant signal today. A delta subsidence signal began in the 1930s and is now a dominant signal in terms of sea level for many coastal environments, overwhelming even the global warming imprint on sea level. Humans have engineered how most water and sediment are discharged into the coastal ocean. Hyperpycnal flow events have become more common for some rivers, and less common for other rivers. Bottom trawling is now widespread, suggesting that even continental shelves have received a significant but as yet quantified Anthropocene impact. The Anthropocene attains the level of a geological climate event, such as that seen in the transition between the Pleistocene and the Holocene.

  6. Intensive landfarming of contaminated sediments

    NARCIS (Netherlands)

    Wieggers, H.J.J.; Bezemer, H.W.

    1995-01-01

    The biodegradation of polycyclic aromatic hydrocarbons (PAH) and mineral oil was investigated in heavily and normally polluted sediments. The aims of the research were: to improve the knowledge of dewatering and ripening of sediments in an open land-farm, to quantify the biodegradation in two

  7. Reservoir sedimentation; a literature survey

    NARCIS (Netherlands)

    Sloff, C.J.

    1991-01-01

    A survey of literature is made on reservoir sedimentation, one of the most threatening processes for world-wide reservoir performance. The sedimentation processes, their impacts, and their controlling factors are assessed from a hydraulic engineering point of view with special emphasis on

  8. [Family medicine in Brazil].

    Science.gov (United States)

    Abath, G M

    1985-01-01

    A need for general physicians, chiefly to deal with health problems in the interior, has made itself felt since 1948. The first two medical residency programs for the training of general physicians were begun in 1976, and today there are 13 such programs. Ten of those programs have been studied in this report, which is based on visits to the establishments where the resident physicians receive training and to some areas served by the programs, and on interviews with education and health officials, alumni of the programs, resident physicians, and coordinators and supervisors of residency programs. "Community general medicine" is the term most widely used in the profession to designate medical practice addressed to the individual, the family and the community and providing total, ongoing and personalized care of the patient. Community general medicine must take account of psychological and socioeconomic factors and interact with the community to collaborate in the solution of its problems. The residency programs in community general medicine are essential for the training of teachers and researchers who will be models to the graduating students and change the undergraduate courses by removing them from the now prevalent overspecialization so as to arrive at a more humane medicine that is more responsive to the health needs of less developed regions. For lack of information on the practice and teaching of community general medicine, attitudes in the medical profession vary from apathetic to sceptical to approving. As a new movement in Brazil, it has great difficulties to overcome, including shortcomings in the training for it and a lack of job openings for graduates. Up to 1982, 174 physicians had completed residencies in community general medicine in Brazil, and about 154 of them are known to have been employed. There are at present 138 physicians attending the 10 programs considered. The regular teaching staff are joined by many professionals in different capacities

  9. The kinetics of denitrification in permeable sediments

    DEFF Research Database (Denmark)

    Evrard, Victor; Glud, Ronnie N.; Cook, Perran L. M.

    2013-01-01

    Permeable sediments comprise the majority of shelf sediments, yet the rates of denitrification remain highly uncertain in these environments. Computational models are increasingly being used to understand the dynamics of denitrification in permeable sediments, which are complex environments to st...

  10. DESIGN CONSIDERATION INVOLVING ACTIVE SEDIMENT CAPS (PRESENTATION)

    Science.gov (United States)

    When contaminated sediments pose unacceptable risks to human health and the environment, management activities such as removal, treatment, or isolation of contaminated sediments may be required. Various capping designs are being considered for isolating contaminated sediment are...

  11. DESIGN CONSIDERATION INVOLVING ACTIVE SEDIMENT CAPS

    Science.gov (United States)

    When contaminated sediments pose unacceptable risks to human health and the environment, management activities such as removal, treatment, or isolation of contaminated sediments may be required. Various capping designs are being considered for isolating contaminated sediment are...

  12. Perfil epidemiológico dos pacientes incluídos no Sistema de Cadastramento e Acompanhamento de Hipertensos e Diabéticos, no município de Rio Claro, RJ

    OpenAIRE

    João Marcos Penna Júnior

    2013-01-01

    Introdução. As doenças cardiovasculares constituem a principal causa de morbimortalidade na população brasileira. Desta forma, o Ministério da Saúde apresentou o HiperDia, um sistema de cadastramento e acompanhamento de portadores de HAS e DM atendidos na rede ambulatorial do SUS. Objetivo. Descrever o perfil dos hipertensos e diabéticos cadastrados no sistema HiperDia das oito unidades básicas do município de Rio Claro/RJ, no período de janeiro a dezembro de 2012. Métodos. Os dados de óbitos...

  13. Acoustical Properties of Sediments.

    Science.gov (United States)

    1981-05-11

    SEDIMENT AS A FUNCTION OF GLYCERIN CONCENTRATION IN THE PORE FLUID AR LUT AS-S81430 DJS - GA 4-16-81 45 IWOo 6 I- 0 Ju w > 40 -- -OTHEORY oLEAST SQUARES...0024 Pot YrvtflU MSt4 INTO) LAIPY9 p 0639 62r4 96 ?4 LIIA A xflVrjl j 116 00639 62F6 25 0 E IIC) doP? )I- 17=1 W; T" [)1? 00640 62FS 20 1118 HWiA OIl ...TI1E’ 00IN iX? Oil A VGVSH 0)019 AV(’i rtj 0(1 A X70UI 0OJ1M XSCRCH l J (C *YSCRCH OnIlE X 3 0 1?2U NECF*LU b 1 ??) X K k’no Q ( 0 0 3. XOIlVM!) flj4

  14. Pediatric lymphomas in Brazil

    Directory of Open Access Journals (Sweden)

    Gabriela Gualco

    2010-01-01

    Full Text Available OBJECTIVE: This study provides the clinical pathological characteristics of 1301 cases of pediatric/adolescent lymphomas in patients from different geographic regions of Brazil. METHODS: A retrospective analyses of diagnosed pediatric lymphoma cases in a 10-year period was performed. We believe that it represents the largest series of pediatric lymphomas presented from Brazil. RESULTS: Non-Hodgkin lymphomas represented 68% of the cases, including those of precursor (36% and mature (64% cell origin. Mature cell lymphomas comprised 81% of the B-cell phenotype and 19% of the T-cell phenotype. Hodgkin lymphomas represented 32% of all cases, including 87% of the classical type and 13% of nodular lymphocyte predominant type. The geographic distribution showed 38.4% of the cases in the Southeast region, 28.7% in the Northeast, 16.1% in the South, 8.8% in the North, and 8% in the Central-west region. The distribution by age groups was 15-18 years old, 33%; 11-14 years old, 26%; 6-10 years old, 24%; and 6 years old or younger, 17%. Among mature B-cell lymphomas, most of the cases were Burkitt lymphomas (65%, followed by diffuse large B-cell lymphomas (24%. In the mature T-cell group, anaplastic large cell lymphoma, ALK-positive was the most prevalent (57%, followed by peripheral T-cell lymphoma, then not otherwise specified (25%. In the group of classic Hodgkin lymphomas, the main histological subtype was nodular sclerosis (76%. Nodular lymphocyte predominance occurred more frequently than in other series. CONCLUSION: Some of the results found in this study may reflect the heterogeneous socioeconomical status and environmental factors of the Brazilian population in different regions.

  15. Designed in Brazil

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    Fernanda Alves da Silva Bonatti

    2010-04-01

    Full Text Available BackgroundHealth design in Brazil has been characterized historically byreplacing imported products with others that are locallymanufactured on a small scale. In January 2007, the HealthDesign Group was created at the National Council forScientific and Technological Development, a partnershipbetween professors and scholars from the University of SaoPaulo. Aiming at documenting some important experiences onthe Brazilian scene to provide historical and methodologicalsubsidies for research, a survey was conducted to find thepioneer experiences that, using the technology available atthe time they were developed, paved the way for the currentresearch.MethodInterviews and surveys in newspapers and journals wereconducted with selection of some Brazilian experiences indesign for health from the end of the 1950s till the early2000s, along with its researchers.ResultsSeveral examples of design for health and historicaldocumentation in Brazil are shown concerning the BrazilianFoundation for the Development of Science Teaching(FUNBEC, the Department of Bioengineering of the HeartInstitute (InCor of the University of Sao Paulo (USP MedicalSchool, the medical equipment at Rede Sarah, the Laboratoryof Design and Materials Selection (LdSM of the FederalUniversity of Rio Grande do Sul (UFRGS in the field ofcraniofacial Orthopedics and some experiences of design areshown in the field of Ophthalmology.ConclusionWe emphasize the cross-disciplinary integration ofsubjects such as medicine, bioengineering and design inall the previously cited experiences. Based on theseexperiences and looking forward to implementing newresearch methods, some members of the Health DesignGroup are involved in the development of solutions forlow vision people: first a high-power-high-optical-qualitymagnifying glass and secondly an innovative readingstand associated with a magnifying glass that has alreadybeen successfully tested in accordance with ethicalstandards by low vision patients

  16. Dating of sediments and determination of sedimentation rate. Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Illus, E. [ed.

    1998-08-01

    The Second NKS (Nordic Nuclear Safety Research)/EKO-1 Seminar was held at the Finnish Centre for Radiation and Nuclear Safety (STUK) on April 2-3, 1997. The work of the NKS is based on 4-year programmes; the current programme having been planned for the years 1994-1997. The programme comprises 3 major fields, one of them being environmental effects (EKO). Under this umbrella there are 4 main projects. The EKO-1 project deals with marine radioecology, in particular bottom sediments and sediment processes. The programme of the second seminar consisted of 8 invited lecturers and 6 other scientific presentations. Dating of sediments and determination of sedimentation rate are important in all types of sedimentological study and model calculations of fluxes of substances in the aquatic environment. In many cases these tasks have been closely related to radioecological studies undertaken in marine and fresh water environments, because they are often based on measured depth profiles of certain natural or artificial radionuclides present in the sediments. During recent decades Pb-210 has proved to be very useful in dating of sediments, but some other radionuclides have also been successfully used, e.g. Pu-239,240, Am-241 and Cs-137. The difficulties existing and problems involved in dating of sediments, as well as solutions for resolving these problems are discussed in the presentations

  17. ‘Parado na esquina’: Performances masculinas e identificações entre ‘bondes’ juvenis na Nova Holanda, Maré, RJ

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    Carla dos Santos Mattos

    2014-10-01

    Full Text Available No contexto do Rio de Janeiro, a criminalização mais ampla dos moradores de favela, baseada na acusação de que eles são coniventes com traficantes, impõe aos primeiros a “limpeza moral” como recurso de apresentação de si. A partir de pesquisa etnográfica sobre os “bondes” (grupos juvenis “parados na esquina” (socializando entre si em um ponto de encontro da favela na Nova Holanda, no Complexo da Maré, no contexto pré-implantação das Unidades de Polícia Pacificadora, este artigo analisa mecanismos de distinção entre “bandidos” e “moradores” que não passam pelo recurso de “limpeza moral” do “favelado”, imposto como característica específica de “construção das margens do Estado”, no sentido proposto por Das e Poole In Rio de Janeiro, the broader criminalization of favela residents, based on the accusation that they connive with drug dealers, imposes a “moral cleaning” on the former as recourse to self-representation. Based on an ethnographic study into the “parados na esquina” (in English, “standing on the corner” bondes or funk posses of youths in Nova Holanda, in the Complexo da Maré favelas, preceding the implementation of the Pacification Police Units, the article ‘Parado na Esquina’: Male Performances and Identifications among Funk ‘Bondes’ in Nova Holanda, Maré, RJ investigates mechanisms of distinction between “gangsters” and “residents” who do not undergo the “favelado” “moral cleaning”, imposed as a specific characteristic of “constructing margins of the State”, in the sense proposed by Das and Poole.Key words: favela, crime, youth, gender, UPP

  18. PERCEPÇÃO DOS DISCENTES DO ENSINO MÉDIO DA CIDADE DE CAMPOS DOS GOYTACAZES/RJ SOBRE QUESTÕES AMBIENTAIS

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    Cristiane Barros CRESPO

    2017-07-01

    Full Text Available Este trabalho tem o objetivo de avaliar o conhecimento e a prática em Educação Ambiental (EA dos discentes de escolas privadas e públicas (estaduais e federais do ensino médio da cidade de Campos dos Goytacazes, RJ. A partir de um questionário contendo sete perguntas, foram analisados 2585 discentes vinculados a 1ª e 3ª série de doze escolas da cidade. Na análise dos dados foram usadas média, erro padrão, teste t de student e análise de variância. Na opinião dos discentes a EA não é abordada com frequência nas disciplinas, apesar de considerarem que seus professores são, na maioria dos casos, aptos para ensinar o tema. Os alunos das escolas privadas obtiveram as melhores notas (75% de acertos e um avanço significativo de conhecimento em EA entre a 1ª e a 3ª série. O mesmo não ocorre nas escolas públicas, demonstrando uma estagnação de conhecimento nesta área ao longo do ensino médio. Os alunos das escolas estaduais acertaram, em média, 73% das questões, enquanto que na rede federal de ensino estes acertaram 67%. O avanço no conhecimento ambiental ao longo da permanência do discente no ensino médio deveria ser melhorado nas escolas, principalmente nas públicas, considerando o aspecto genérico das perguntas do questionário. O fato preocupante foi observar que nas escolas públicas não há avanço de conhecimento nesta área entre a 1ª e a 3ª série. Portanto, é necessária uma abordagem mais efetiva nas práticas desenvolvidas no ambiente escolar relativas as questões ambientais.

  19. Prevalência de ametropias e oftalmopatias no quilombo São José da Serra - Valença - RJ

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    Abelardo Souza Couto Jr.

    2013-12-01

    Full Text Available OBJETIVO: Determinar a prevalência das ametropias e oftalmopatias na população do Quilombo São José da Serra - Valença - RJ. MÉTODOS: Foram examinados 92 indivíduos de uma população de 102 pessoas da comunidade Quilombola em São José da Serra. Todos foram submetidos à avaliação oftalmológica completa, incluindo anamnese, ectoscopia ocular, medida da acuidade visual, teste de estereopsia, reflexo vermelho, cobertura monocular, Hirschberg, refração objetiva, subjetiva, biomicroscopia, tonometria de aplanação de GoldmannR, tonometria de sopro e fundoscopia direta ou binocular indireta usando lente de 20D. RESULTADOS: Foram examinados cerca de 90,19% da população quilombola, sendo 61,95% do sexo feminino e 38,04% do sexo masculino. A idade variou de 6 meses a 89 anos. Foram encontrados ametropias com necessidade de correção óptica em 23,91% dos indivíduos sendo mais frequente a presbiopia associada à hipermetropia, miopia e/ou astigmatismo com prevalência de 59,09% dos indivíduos examinados, seguido da presbiopia isolada em 22,72%, do astigmatismo hipermetrópico em 13,63% e do astigmatismo miópico em 4,54% dos examinados. Em relação às oftalmopatias encontraram-se catarata senil em 7,61%, ambliopia refracional em 6,52%, atrofia do epitélio pigmentar da retina e atrofia peripapilar em 2,17%, glaucoma em 1,09%, pterígio em 1,09%, retinocoroidite por toxoplasmose em 1,09% e hipopigmentação retiniana (albinismo ocular em 1,09%. CONCLUSÃO: A prevalência das ametropias e doenças oculares no Quilombo São José da Serra foi de 23,9%(22/92 e 20,6%(19/92, respectivamente.

  20. Análise da Arborização de Quatro Praças no Bairro da Tijuca, RJ, Brasil

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    Welington Kiffer de Freitas

    Full Text Available Neste estudo foi realizada a avaliação da arborização de quatro praças da Tijuca, Rio de Janeiro, RJ, considerando a riqueza de espécies, análises morfométricas dos indivíduos, além do seu diagnóstico fitossanitário. Foram encontradas 310 árvores, distribuídas em 36 espécies e 14 famílias, com destaque para Cassia siamea e Delonix regia que, juntas, corresponderam a 32,4% dos indivíduos. Cassia siamea representou 9,4% dos indivíduos da Praça Castilho França, 32,3% da Varnhagen, 24,0% da Saens Pena e 11,1% da Xavier de Brito. Já Delonix regia totalizou 3,2% das espécies da Praça Varnhagen, 10,7% da Saens Pena e 35,2% da Xavier de Brito. Nas quatro praças foi encontrada uma distribuição proporcional entre as espécies exóticas e nativas. Todavia, comparando o número de indivíduos, foi constatado predomínio das exóticas. Considerando todos os indivíduos amostrados, 83,6% concentraram-se entre 5 m e 15 m de altura. Observou-se que 49,5% das árvores apresentaram DAP maiores que 30 cm. Considerando-se os aspectos fitossanitários, 64,5% das árvores encontravam-se saudáveis e 25,4% mostravam sinais de ataques de pragas, além disso, 10,1% sofreram injúrias. Diante desses fatos, recomenda-se a substituição dos indivíduos debilitados que sejam uma ameaça aos usuários ou prejudiquem a estética, procurando sempre utilizar o maior número de espécies nativas possível, para evitar a uniformidade. Também se faz necessário intensificar o controle das pragas e as atividades de educação ambiental, com o intuito de reduzir os danos nos exemplares da flora das praças urbanas.

  1. Consulta ginecológica sob a ótica de estudantes do ensino médio do Rio de Janeiro, RJ

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    Sandra de Morais Pereira

    2013-02-01

    Full Text Available OBJETIVO: Analisar diferenças socioculturais e percepções sobre a consulta ginecológica por adolescentes. MÉTODOS: Estudo transversal com 418 alunas do ensino médio de três escolas de diferentes perfis, localizadas na cidade do Rio de Janeiro, RJ, em 2010. Aplicou-se questionário estruturado, abordando características sociodemográficas, comportamento sexual e avaliação da consulta ginecológica. Utilizou-se o teste de Qui-quadrado (Yates e o t de Student, adotando-se p < 0,05. RESULTADOS: Alunas dos colégios privado e público apresentaram perfis semelhantes e diferiram daquelas da rede pública estadual que tiveram nível socioeconômico mais baixo, menor escolaridade dos responsáveis, predominância da raça negra, maior número de parceiros, gestações e histórico de violência sexual. As médias de idades da menarca e sexarca foram semelhantes entre as estudantes e a primeira consulta ginecológica foi significativamente mais tardia nas alunas da rede estadual. A maioria referiu conhecimento sobre anticoncepção e doenças sexualmente transmissíveis, porém pequena parte obteve essas orientações na consulta. As estudantes manifestaram desejo de que o profissional investisse mais tempo, paciência e disponibilidade no atendimento. CONCLUSÕES: O atendimento ginecológico na adolescência é insatisfatório segundo a avaliação das adolescentes estudadas. As usuárias dos serviços privados submetem-se à consulta ginecológica em idade mais precoce do que aquelas que têm acesso apenas à rede pública. É necessário criar mecanismos que facilitem o acesso e a adesão desse grupo etário à rotina preventiva ginecológica.

  2. DIMENSIONAMENTO E VIABILIDADE ECONÔMICA DA COLETA E USO DE ÁGUAS PLUVIAIS NO MUNICÍPIO DE CAMPOS DOS GOYTACAZES, RJ

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    Carlos Sulzer Pêgo

    2012-07-01

    Full Text Available Este trabalho avalia a viabilidade técnica e econômica de se implantar um sistema de coleta de águas pluviais em uma instituição de ensino e uma residência, ambas localizadas no município de Campos dos Goytacazes, RJ. A pluviometria da cidade, área de captação e a estimativa do consumo de água não potável foi estimada para a Universidade Candido Mendes e uma residência dimensionada para cinco moradores. O custo de implantação, manutenção e valor da água tratada foi usado para calcular a viabilidade econômica do sistema. A precipitação na década de 2000 é significativamente maior do que na década de 1990. Os quatro primeiros e os dois últimos meses do ano são os mais chuvosos, enquanto que junho a agosto são mais secos. Apesar da água coletada atender a 100% da demanda, o projeto não é economicamente viável na residência. Na universidade, a coleta atenderia a 27% da demanda anual, no entanto, seria economicamente viável. O armazenamento e uso de água pluvial em áreas urbanas colaboram para a preservação do meio ambiente, é uma ferramenta de educação ambiental, evita enchentes, escassez e traz benefícios econômicos devido a redução do consumo de água tratada. Sua implantação em residência poderia ser incentivada com atos governamentais, como a redução de impostos. Para as empresas, além de redução de custos, é um sistema que pode compor o marketing verde, um seguimento de mercado em ascensão.

  3. APLICAÇÃO DA ESCALA DE FRAMINGHAM NA UNIDADE BASICA DE SAÚDE DO BAIRRO HORTO FLORESTAL DO MUNICÍPIO DE ITAPERUNA-RJ

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    Wilian de Freitas JUNIOR

    2017-07-01

    Full Text Available Há consenso sobre a importância da adoção de estratégias de atenção integral à saúde focadas na prevenção do aparecimento de comorbidades, dentre inúmeros fatores, tais como: envelhecimento da população, sobrevida das doenças infecciosas, sendo que uma parcela importante pode ser atribuída ao controle inadequado dos fatores associados ao desenvolvimento dessas doenças. O presente estudo teve como objetivo analisar e avaliar o perfil dos pacientes acompanhados em uma Unidade Básica de Saúde (UBS, com a perspectiva de prevenção de sofrimento de um evento coronariano agudo, contribuindo para a melhoria da qualidade de vida dos atores sociais do Noroeste Fluminense. O universo da pesquisa foi a UBS do bairro Horto Florestal, Itaperuna/RJ, onde foi realizado um estudo analítico observacional transversal compreendendo a aplicação da Escala de Framingham. Os critérios de inclusão foram pacientes em idade entre 30 e 74 anos, de forma randomizada, no período de agosto/2014, abril/2015. Dentre os preditores ressaltam-se LDL colesterol, HDL colesterol, pressão arterial sistêmica, diabetes mellitus, tabagismo. Faz-se mister elucidar os resultados mais significativos: 44,8% dos indivíduos pontuaram risco através do HDL colesterol; quanto aos níveis de pressão arterial, mais de 50% somaram pontos no escore. Referindo-se ao diabetes, 16,2% apresentaram a doença e ao tabagismo, 20%, sendo que estes dois últimos agravam ainda mais o risco de evento cardiovascular. Estudos embasados na integração com a rede de serviços de saúde contribuem para a prevenção de agravos, constituindo-se estratégias significativas para a construção de um país mais justo, onde a saúde promove cidadania na sua integralidade.Palavras-chave: Rede de Saúde. Escala de Framingham. Risco. Prevenção. 

  4. Avaliação da concentração de mercúrio em sedimentos e material particulado no rio Acre, estado do Acre, Brasil Mercury concentration assessment in botton sediments and suspended solids from Acre river, in the State of Acre, Brazil

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    Artur Fernando Silva Mascarenhas

    2004-01-01

    Full Text Available A avaliação dos teores de mercúrio em sistemas aquáticos sem influência direta de fontes antropogênicas conhecidas não tem sido conduzida com freqüência na região Amazônica. Visando contribuir para esclarecer a ocorrência de valores elevados de Hg em peixes consumidos pela população de Rio Branco - AC, o Instituto Evandro Chagas - IEC, realizou um estudo para quantificar os teores de Hg em sedimentos de fundo e material particulado no rio Acre e alguns afluentes, além da caracterização físico-química das águas entre as cidades de Brasiléia e Assis Brasil. As amostras de sedimentos foram peneiradas na fração Mercury levels assessment in aquatic systems areas without influences of antropogenic sources have not been well studied in the Amazon region. For the identification of the origin of high values of Hg in fish consumed by population of Rio Branco City - AC, the Evandro Chagas Institute - IEC, studied the mercury levels in sediments, suspended solids and studied also the physical-chemical characterization of waters, in the Acre river and also some in afluents, between Brasiléia and Assis Brasil cities. Bottom sediments samples were sieved to <250 mesh fraction after drying. The suspended solid was obtained by precipitation with Al2SO4. About 250 mg of the material was submitted the acid digestion and the determinations of Hg were made by Could Vapor Atomic Absorption Spectrometry. The physical-chemical parameters pH, electric conductivity, temperature and dissolved total solids, were studied in the field, by potenciometric methods. The Hg levels in bottom sediments range 0,018 and 0,184 mug g-1, mean of 0,054 ± 0,034 mug g-1, while the suspended solids varied between 0,067 and 0,220 mug g-1, average of 0,098 ± 0,037 mug g-1. The waters were slightly acid with pH varying among 5,80 - 6,95 and conductivity electric 151,60 - 1.151,00 muS cm-1. The mercury levels in the analyzed materials was below of standard levels for

  5. RESULTS OF SOLID PHASE SEDIMENT TOXICITY TESTS WITH REDUCED SEDIMENT VOLUMES FOR SEDIMENT TOXICITY

    Science.gov (United States)

    Development and standardization of sediment toxicity test methods for freshwater organisms have been underway for several years. Both EPA and ASTM have published methods for assessing the short-term (e.g., 10-d) toxicity of sediments to two benthic freshwater organisms (Hyalella ...

  6. Emergency medicine in Southern Brazil.

    Science.gov (United States)

    Tannebaum, R D; Arnold, J L; De Negri Filho, A; Spadoni, V S

    2001-02-01

    Emergency medicine is developing rapidly in southern Brazil, where elements of both the Franco-German and the Anglo-American models of emergency care are in place, creating a uniquely Brazilian approach to emergency care. Although emergency medical services (EMS) in Brazil have been directly influenced by the French mobile EMS (SAMU) system, with physicians dispatched by ambulances to the scenes of medical emergencies, the first American-style emergency medicine residency training program in Brazil was recently established at the Hospital de Pronto Socorro (HPS) in Porto Alegre. Emergency trauma care appears to be particularly developed in southern Brazil, where advanced trauma life support is widely taught and SAMU delivers sophisticated trauma care en route to trauma centers designated by the state.

  7. Nematode larvae of hygienic importance infecting Chaetodipterus faber (Broussonet, 1782 and Trachinotus carolinus (Linnaeus, 1766 (Pisces: Teleostei in Brazil

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    Janaina Ribeiro

    2014-06-01

    Full Text Available ABSTRACT. Ribeiro J., São Clemente S.C., Lopes L.M.S. & Knoff M. Nematode larvae of hygienic importance infecting Chaetodipterus faber (Broussonet, 1782 and Trachinotus carolinus (Linnaeus, 1766 (Pisces: Teleostei in Brazil. [Larvas de nematóides de importância higiênica-sanitária em Chaetodipterus faber (Broussonet, 1782 e Trachinotus carolinus (Linnaeus, 1766 (Pisces: Teleostei no Brasil.] Revista Brasileira de Medicina Veterinária, 36(2: 121-124, 2014. Laboratório de Helmintos Parasitos de Vertebrados, Instituto Oswaldo Cruz, Fiocruz, Avenida Brasil 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brasil. E-mail: knoffm@ioc.fiocruz.br From March 2010 to Aprill 2011, thirty-five specimens of the Atlantic spadefish Chaetodipterus faber, and thirty specimens of the Florida pompano Trachinotus carolinus, were purchased from a fish market of municipality of Niterói, Rio de Janeiro State, Brazil. The fishes were measured, fileted and further had their organs investigated for helminths. In the both species were parasitized by Hysterothylacium sp. third-stage larvae nematodes with prevalence of 17.1% and 40%, mean intensity of 2 and 9.6, range of infection of 1-2 and 1-28 and mean abundance of 0.23 and 3.83,respectively. The sites of infection to C. faber were piloric cecum, liver, and abdominal cavity, and to T. carolinus, piloric cecum, liver, seroses of liver and ovarian, and abdominal cavity. Hysterothylacium sp. larvae were reported in C. faber for the first time, and is the first report in T. carolinus by these nematodes for Brazil, presenting considerations on the sanitary aspects due to the importance in the fish hygiene and public health programs.

  8. Runoff and sediment transport in a degraded area

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    Edivaldo Lopes Thomaz

    2012-02-01

    Full Text Available Gully erosion occurs by the combined action of splash, sheetwash and rill-wash (interrill and rill erosion. These erosion processes have a great capacity for both sediment production and sediment transport. The objectives of this experiment were to evaluate hydrological and sediment transport in a degraded area, severely dissected by gullies; to assess the hydraulic flow characteristics and their aggregate transport capacity; and to measure the initial splash erosion rate. In the study area in Guarapuava, State of Paraná, Brazil (lat 25º 24' S; long 51º24' W; 1034 m asl, the soil was classified as Cambissolo Húmico alumínico, with the following particle-size composition: sand 0.116 kg kg-1; silt 0.180 kg kg-1; and clay 0.704 kg kg-1. The approach of this research was based on microcatchments formed in the ground, to study the hydrological response and sediment transport. A total of eight rill systems were simulated with dry and wet soil. An average rainfall of 33.7 ± 4.0 mm was produced for 35 to 54 min by a rainfall simulator. The equipment was installed, and a trough was placed at the end of the rill to collect sediments and water. During the simulation, the following variables were measured: time to runoff, time to ponding, time of recession, flow velocity, depth, ratio of the initial splash and grain size. The rainsplash of dry topsoil was more than twice as high as under moist conditions (5 g m-2 min-1 and 2 g m-2 min-1, respectively. The characteristics of the flow hydraulics indicate transition from laminar to turbulent flow [Re (Reynolds number 1000-2000]. In addition, it was observed that a flow velocity of 0.12 m s-1 was the threshold for turbulent flow (Re > 2000, especially at the end of the rainfall simulation. The rill flow tended to be subcritical [Fr (Froude Number < 1.0]. The variation in hydrological attributes (infiltration and runoff was lower, while the sediment yield was variable. The erosion in the rill systems was

  9. Análise Multivariada de Dados Ecológicos da Baía de Guanabara- RJ,com Base em Foraminíferos Bentônicos.

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    Priscila Tavares dos Santos

    2007-07-01

    Full Text Available Guanabara bay is an estuary environment situated in the seaboard of Rio de Janeiro state, under the coordinates 22º 40’ and 23º 00’S and 43º 00’ and 43º 20’W. Nowadays, it has an approximate area of 377 km2, it has had a reduction of 91 km2 since the discovery of Brazil, being considered one of the most polluted seacoast regions of the country. The environmental monitoring of Guanabara bay becomes increasingly necessary in order to be capable of taking effectivemeasures in its management. Therefore, the use of bioindicator organisms, like foraminifera, is an excellent tool because of their rapid response to environmental changes. The goal of this paper is to apply statistical analyses to the biotic data benthicforaminifera, aiming to observe how they behave in Guanabara bay. In November 1999, samples of bottom sediment were collected along Guanabara bay; 52 of them distributed along all the bay were used in this study. They were treated and classified according to the pattern methodology for foraminifera. For the numerical ecology, grouping analysis and indicating species analysis (ISA were done using the programs Statistica 6.0 and PCORD. Through the groupinganalysis, it was observed the formation of groups in both samples and species. ISA showed what species is the best one toindicate the actual state of Guanabara bay - Ammonia tepida. The multivaried ecological analyses had an optimal response in the evaluation of patterns of pollution in Guanabara bay, based on benthic foraminifera.

  10. The white marble used in Brasília, a World Heritage and the capital of Brazil

    Science.gov (United States)

    Heloisa Barros de Oliveira Frascá, Maria

    2015-04-01

    Created as the Brazilian capital, in the central western part of Brazil, Brasilia is a definitive example of 20th century modernist urbanism. It was built in only four years, from 1956 to 1960, following the project of urban planner Lucio Costa and architect Oscar Niemeyer that intended that every element - from the layout of the residential and administrative districts (often compared to the shape of a bird in flight) to the symmetry of the buildings themselves - should be in harmony with the city's overall design. This description is from the World Heritage Centre, of Unesco, that nominated Brasilia as a Cultural Heritage Property in 1987. Most of the remarkable buildings designed Oscar Niemeyer, cited by Unesco, are around the Plaza of Three Powers, as the Planalto ("Plateau") Palace, the National Congress, the Supreme Court, the Cathedral, the National Theatre among others. Aside from the worldwide recognition of the architectonic value of these buildings, it is barely mentioned the expressive use of white marble as cladding. Very few are found in the literature about specification criteria, provenance, fixation method and conservation. According to Oscar Niemeyer Foundation, at this moment they know that the stone come from a supplier in the State of Rio de Janeiro. A preliminary research indicated that the marble used in most of Brasilia buildings are from the municipality of Italva, in the northwest of the State of Rio de Janeiro (DRM-RJ, 2012). In a study carried out by DRM-RJ, in 2003, it is mentioned two white marble commercialized as dimension stone in Italva: "Sparkling Marble" (SM) and "Italva White Marble" (IWM), respectively dolomite-calcite marble and dolomite marble. Their main characteristics are: bulk specific gravity: 2,792 kg/m3 (SM) and 2,852kg/m3 (IWM); water absorption: 0.08 % (SM) and 0.10 % (IWM); uniaxial compression strength: 84.3 MPa (SM) and 88.2 MPa (IWM); modulus of rupture: 9.92 MPa (SM) and 8.75 MPa (IWM); coefficient of linear

  11. Educação bilíngue de alunos surdos: experiências inclusivas na escola municipal Paulo Freire / Niterói / RJ

    Directory of Open Access Journals (Sweden)

    Rosana Maria do Prado Luz Meireles

    2017-03-01

    Full Text Available O presente estudo foi realizado na Escola Municipal Paulo Freire, da Fundação Municipal de Educação, Niterói/RJ, tendo como objeto de estudo seu projeto de educação bilíngu~/bicultural para alunos surdos. O estudo se desenvolveu considerando as questões: Quais as concepções político-filosóficas que fundamentam o Projeto de Educação Bilíngue da Escola Municipal Paulo Freire/ Niterói/RJ?; Qual a organização pedagógica do referido projeto?; Como se dão as relações interpessoais entre professores e alunos surdos e ouvintes na implementação do projeto? Com base nessas questões, este estudo avaliou o processo de inclusão e de organização pedagógica da educação de surdos na referida escola e para tal foram estabelecidos os objetivos: Caracterizar o Projeto de Educação Bilíngue para alunos surdos na Escola Municipal Paulo Freire/Niterói no que se refere às concepções político-filosóficas para educação de alunos surdos; à organização pedagógica; às dinâmicas relacionais vividas no processo de inclusão e os desafios postos aos profissionais da escola na educação de alunos surdos; .à centralidade da Língua Brasileira de Sinais/Libras na aq·uisição, construção do conhecimento dos alunos surdos e na comunicação entre surdos e ouvintes. Foi adotada a teoria crítica como suporte teórico-metodológico, com ênfase no pensamento de Adorno quanto aos aspectos democráticos da educação, considerando a escola como lugar de reflexão e crítica às ações de dominação cultural, visando a não permitir sua reprodução. Também foi considerado o pensamento de Skliar quanto à sua perspectiva de educação de alunos surdos que respeite as singularidades da língua e cultura da comunidade surda, assim como o bilinguismo, uma opção teóricometodológica de atendimento às demandas dos alunos surdos e de sua Formação com base na Libras e a língua portuguesa. Quanto ao material e procedimentos de

  12. Electric resistivity prospecting for groundwater in the Agricultural-Environmental Farm of the EMBRAPA/PESAGRO, Seropedica, Rio de Janeiro State, Brazil; Prospeccao geofisica eletrorresistivimetrica para agua subterranea na Fazenda Agroecologica da EMBRAPA/PESAGRO, Seropedica, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Leonidas Castro; Garcia, Jose Miguel Peters [Universidade Federal Rural do Rio de Janeiro, RJ (Brazil)

    1995-12-31

    Preliminary results achieved by the Geoelectric Resistivity Sounding Survey of Baixada Fluminense, run by DEGEO/IA/UFRRJ (Rural University of Rio de Janeiro, Agronomy Institute, Geology Dept.) are presented. They consist in a 1 km long geoelectrical cross section imaging the subsurface geo-hydro structural conditions in EMBRAPA/PESAGRO Agroecocultural Farm , in Seropedica, Rio de Janeiro State, where exploration for groundwater is needed to support irrigation projects. As foreseen by the correlation of the 6 vertical electrical soundings, the resistivimetric region R4, proved to be an aquifer, that yields 2500 l/h. Direct sampling belonging to this resistivimetric region R4 resulted in semi weathered gravitic gneissic rock, typically horizon C, covered by weathered rock or soil, associated to the resistivimetric region R3/R2, typically horizon B, what confirm previous studies of Mello (1992, 1993) for the western Baixada Fluminense. (author). 5 refs., 1 fig

  13. Geological, geotechnical and environmental evaluation of influence area of the oil production in the municipality of Mangaratiba, Rio de Janeiro, Brazil; Avaliacao geologico-geotecnica e ambiental da zona de influencia do duto petrolifero no municipio de Mangaratiba (RJ)

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Andre Ferreira; Polivanov, Helena [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Geociencias. Dept. de Geologia; Silva, Jorge Xavier da [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Geociencias. Dept. de Geografia; Oliveira, Wilson J. de [PETROBRAS Engenharia, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    This paper is applicable for a specials and strategies areas that must be permanently controlled called pipelines and their proximities. Those areas are liable to be under the influence of different situations like potential environmental risks - eg. conflagrations, floods, soil erosion, slumps and also accidental risks like located spills. Besides those negatives environmental situations, the pipelines also cross different regions that has an important natural resource like forests, watersheds, urban, industrial and agricultural areas. For main regulator of this work the pipeline was developed a series of maps that can be used single or overlayed with another maps. Those maps can be useful for Mangaratiba city urban management and demonstrate possible environmental risks that can occur on pipelines proximities of this city. (author)

  14. Analysis of risk assessment of brachytherapy from the radiotherapy services of the metropolitan region of Rio de Janeiro, RJ, Brazil; Analise da percepcao de risco da braquiterapia dos servicos de radioterapia da regiao metropolitana do Rio de Janeiro

    Energy Technology Data Exchange (ETDEWEB)

    Burgos, Adam de Freitas; Paiva, Eduardo de, E-mail: adam@bolsista.ird.gov.br, E-mail: epaiva@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ),Rio de Janeiro, RJ (Brazil); Souza, Roberto Salomon de, E-mail: salomon@inca.gov.br [Instituto Nacional de Cancer (PQRT/INCA), Rio de Janeiro, RJ (Brazil). Programa de Qualidade em Radioterapia

    2014-07-01

    Currently there are few applications on the risk analysis procedures related to radiotherapy, mainly in the practice of brachytherapy. The objective of this study was to analyze the perception of risk levels, present in the practice of high dose rate brachytherapy (HDR), using a form based on the concept of the risk matrix and a database (SEVRRA) containing information about the processes related to routine brachytherapy. A form containing information regarding the brachytherapy procedure HDR and an attachment indicating how to complete it properly was delivered to a medical physicist of each service/institution. The reference value for the risk levels found, considered acceptable for all performed analyzes, was set at a percentage limit of 33% (assuming a failure in each 3 existing processes). The results showed that the overall risk analysis showed a value for average percentage of prioritized risk of 18% below the recommended range. About the analyzed groups, the higher average percentage of relative risk was found less than 12% of the recommended range, associated with the group of patients. On existing steps, the highest average percentage of relative risk was found less than 1% of the recommended range, associated with stage records and treatment planning. This study showed that although this procedure does not have a large history of accidents, still poses risks considerable that must be managed with great accuracy and immediate action to an effective decrease these risk percentages.

  15. Analysis of risk perception of teletherapy in radiotherapy services of Rio de Janeiro city, RJ, Brazil; Analise da percepcao de risco da teleterapia dos servicos de radioterapia da regiao metropolitana do Rio de Janeiro

    Energy Technology Data Exchange (ETDEWEB)

    Burgos, Adam F.; Paiva, Eduardo de [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Souza, Roberto S. de, E-mail: adam@bolsista.ird.gov.br [Instituto Nacional de Cancer (INCA), Rio de Janeiro, RJ (Brazil). Programa de Qualidade em Radioterapia

    2015-12-15

    Currently there are few applications on the risk analysis procedures related to radiation therapy, especially in the practice of radiotherapy. The objective of this study was to analyze the perception of risk levels present in the practice of teletherapy (only the use of linear accelerators), through a form based on the risk matrix concept and a database (SEVRRA) containing information about the processes related to routine teletherapy. Was delivered to a medical physicist for each service, a form containing information relating to teletherapy procedure and an annex indicating how to fill it properly. The results show that, according to the opinion of 16 medical physicists participants, six of these analyzes showed a prioritized risk percentage above 50%, other five had a risk of prioritized percentage between 0 and 50%, and the remainder had a risk percentage prioritized null. Two steps groups had the highest incidence of cases classified with high and very high risk: records and treatment planning group and equipment group. It was then possible to find the most risk processes these steps groups. Finally, we performed an analysis of the effectiveness of the controls present in the proposed form. The four most incidents controls, three of them had a percentage efficiency above 80%, and viable its continuous use in the analyzed services, as well as serving as a recommendation for use in other services not analyzed. This study showed that, although there are considerable histories of accidents for teletherapy procedure, you can not only identify the risks of higher expression but also mitigate them, based on actions and appropriate recommendations for each case analyzed properly. (author)

  16. Palinotaxonomia de espécies de Apocynaceae ocorrentes na Restinga de Carapebus, Carapebus, RJ, Brasil Palynotaxonomy of the species of the Apocynaceae occur on the "restinga" of the Carapebus, Carapebus, Rio de Janeiro State, Brazil

    Directory of Open Access Journals (Sweden)

    Fábio de França Moreira

    2004-12-01

    Full Text Available Neste trabalho foram tratadas, palinologicamente, 11 espécies de Apocynaceae pertencentes a sete gêneros, ocorrentes na restinga de Carapebus, situada no litoral norte do Estado do Rio de Janeiro. As espécies tratadas foram: Aspidosperma parvifolium A. DC.; Forsteronia leptocarpa (Hook. & Arns. A. DC.; Himatanthus lancifolius (Müll. Arg. Woodson; Mandevilla fragrans (Stadelm. Woodson; Mandevilla sp.; M. moricandiana (A. DC. Woodson; M. tenuifolia (J.C. Mikan Woodson; Prestonia coalita (Vell. Woodson; Rhabdadenia pohlii Müll. Arg.; Tabernaemontana flavicans Willd. ex Roem. & Schult.; T. laeta Mart. Os grãos de pólen foram tratados pelo método da acetólise láctica, medidos, descritos e ilustrados sob microscopia de luz e microscopia eletrônica de varredura. Os resultados obtidos mostraram que dois grandes grupos podem ser identificados: grãos de pólen colporados - Aspidosperma parvifolium (5-6-colporados, exina psilada, rugulada apenas no apocolpo, Himatanthus lancifolius (3-colporados, exina reticulada, Tabernaemontana flavicans (4-colporados, endoabertura endocingulada e T. laeta (3-4-colporados, exina rugulada; grãos de pólen porados - Forsteronia leptocarpa, as quatro espécies de Mandevilla, Prestonia coalita e Rhabdadenia pohlii. Concluiu-se que os gêneros puderam ser separados utilizando-se as características polínicas e, dentro do gênero, as espécies estudadas apresentaram heterogeneidade polínica.Eleven species of Apocynaceae belonging to seven genera were palynologically studied in this work. The species occur in the "restinga" of Carapebus, located on the north coast of Rio de Janeiro State. The species were as followed: Aspidosperma parvifolium A. DC.; Forsteronia leptocarpa (Hook. & Arns. A. DC.; Himatanthus lancifolius (Müll. Arg. Woodson; Mandevilla fragrans (Stadelm. Woodson; Mandevilla sp.; M. moricandiana (A. DC. Woodson; M. tenuifolia (J.C. Mikan Woodson; Prestonia coalita (Vell. Woodson; Rhabdadenia pohlii Müll. Arg.; Tabernaemontana flavicans Willd. ex Roem. & Schult.; T. laeta Mart. The pollen grains were treated by the lactical acetolysis method, measured, described and illustrated by light microscopy and scanning electronic microscopy. The results obtained showed that two large groups can be identified: colporate pollen grains - Aspidosperma parvifolium (5-6-colporate, psilate exine, rugulate only apocolpus, Himatanthus lancifolius (3-colporate, reticulate exine, Tabernaemontana flavicans (4-colporate, endocingulate endoaperture and T. laeta (3-4-colporate, rugulate exine; porate pollen grains - Forsteronia leptocarpa, the four species of Mandevilla, Prestonia coalita, Rhabdadenia pohlii. It was concluded that the genera could be separated by pollinical characters and within genera their species studied are heterogeneous palynologically.

  17. Coastal sediment dynamics in Spitsbergen

    Science.gov (United States)

    Deloffre, J.; Lafite, R.; Baltzer, A.; Marlin, C.; Delangle, E.; Dethleff, D.; Petit, F.

    2010-12-01

    In arctic knowledge on coastal sediment dynamics and sedimentary processes is limited. The studied area is located in the microtidal Kongsfjorden glacial fjord on the North-western coast of Spitsbergen in the Artic Ocean (79°N). In this area sediment contributions to the coastal zone is provided by small temporary rivers that flows into the fjord. The objectives of this study are to (i) assess the origin and fate of fine-grained particles (ice cover on sediment dynamics. The sampling strategy is based on characterization of sediment and SPM (grain-size, X-rays diffraction, SEM images, carbonates and organic matter contents) from the glacier to the coastal zone completed by a bottom-sediment map on the nearshore using side-scan sonar validated with Ekman binge sampling. River inputs (i.e. river plumes) to the coastal zone were punctually followed using CTD (conductivity, temperature, depth and turbidity) profiles. OBS (water level, temperature and turbidity) operating at high-frequency and during at least 1 years (including under sea ice cover) was settled at the mouth of rivers at 10m depth. In the coastal zone the fine-grained sediment deposit is limited to mud patches located at river mouths that originate the piedmont glacier. However a significant amount of sediment originates the coastal glacier located in the eastern part of the fjord via two processes: direct transfer and ice-drop. Results from turbidity measurements show that the sediment dynamics is controlled by river inputs in particular during melting period. During winter sediment resuspension can occurs directly linked to significant wind-events. When the sea ice cover is present (January to April) no sediment dynamics is observed. Sediment processes in the coastal zone of arctic fjords is significant however only a small amount of SPM that originates the river plume settles in the coastal zone; only the coarser material settles at the mouth of the river while the finer one is deposited further (in

  18. SEDIMENTATION BROKEN IN INCLINED SEOIMENTADORES

    OpenAIRE

    Lama-Ramirez, R.; Facultad de Química e Ingeniería Química, Departamento Académico de Operaciones Unitarias,Universidad Nacional Mayor de San Marcos,Lima,Perú.; Condorhuamán-Ccorimanya, C.; Facultad de Química e Ingeniería Química, Departamento Académico de Operaciones Unitarias,Universidad Nacional Mayor de San Marcos,Lima,Perú.

    2014-01-01

    We have studied the batch sedimentation of aqueous suspensions of precipitated calcium carbonate, barium sulfate and lead oxide settlers inclined rectangular and circular cross section. The énguio tilt with respect to the horizontal between 35 ° and 75 °, to suspensions that vary in strength between 39.4 and 1070 g / l.Las obtained apparent sedimentation velocities ranging from 0.071 to 17.6 cm / min. the apparent sedimentation rate has been correlated using a modified version of the equation...

  19. Development of site-specific sediment quality guidelines for North and South Atlantic littoral zones: comparison against national and international sediment quality benchmarks.

    Science.gov (United States)

    Choueri, R B; Cesar, A; Abessa, D M S; Torres, R J; Morais, R D; Riba, I; Pereira, C D S; Nascimento, M R L; Mozeto, A A; DelValls, T A

    2009-10-15

    We aimed to develop site-specific sediment quality guidelines (SQGs) for two estuarine and port zones in Southeastern Brazil (Santos Estuarine System and Paranaguá Estuarine System) and three in Southern Spain (Ría of Huelva, Bay of Cádiz, and Bay of Algeciras), and compare these values against national and traditionally used international benchmark values. Site-specific SQGs were derived based on sediment physical-chemical, toxicological, and benthic community data integrated through multivariate analysis. This technique allowed the identification of chemicals of concern and the establishment of effects range correlatively to individual concentrations of contaminants for each site of study. The results revealed that sediments from Santos channel, as well as inner portions of the SES, are considered highly polluted (exceeding SQGs-high) by metals, PAHs and PCBs. High pollution by PAHs and some metals was found in São Vicente channel. In PES, sediments from inner portions (proximities of the Ponta do Félix port's terminal and the Port of Paranaguá) are highly polluted by metals and PAHs, including one zone inside the limits of an environmental protection area. In Gulf of Cádiz, SQGs exceedences were found in Ria of Huelva (all analysed metals and PAHs), in the surroundings of the Port of Cádiz (Bay of Cádiz) (metals), and in Bay of Algeciras (Ni and PAHs). The site-specific SQGs derived in this study are more restricted than national SQGs applied in Brazil and Spain, as well as international guidelines. This finding confirms the importance of the development of site-specific SQGs to support the characterisation of sediments and dredged material. The use of the same methodology to derive SQGs in Brazilian and Spanish port zones confirmed the applicability of this technique with an international scope and provided a harmonised methodology for site-specific SQGs derivation.

  20. Aquatic invertebrate's distribution in a freshwater coastal lagoon of southern Brazil in relation to water and sediment characteristics Distribuição de invertebrados aquáticos em uma lagoa costeira de água doce ao sul do Brasil em relação às características de água e sedimento

    Directory of Open Access Journals (Sweden)

    Leonardo Kleba Lisboa

    2011-06-01

    Full Text Available AIM: The objective of this study was to evaluate the influence of water and sediment characteristics on the abundance, richness and diversity of the benthic invertebrate community in Peri lagoon, a freshwater coastal lagoon located in central coast of Santa Catarina State; METHODS: Samplings were performed in April, May and June 2009, in five different sites of Peri lagoon. The samples were taken with an Eckman-Birge drag, totalizing 60 for the invertebrate community, and 45 for sediment. Water physicochemical variables were also measured. Environmental influences in benthic community have been measured using a Canonical Correspondence Analysis (CCA. Linear regressions were also plotted for main correlations; RESULTS: A total of 5,535 specimens were collected, identified into 18 taxa. Tanaidacea was the most abundant representing 54% of relative abundance, followed by Diptera (23%, and Ostracoda (17%. The richest family was Chironomidae with 6 taxa. CCA results indicated positive correlation between Chaoborus and Stenocypris with local depth, and negative correlation between Odonata, Gastropoda, Cytheridella and Coleoptera with the finest grains of sediment, as well as between Tanaidacea, Lopescladius, Annelida and Nematoda with both organic matter (OM content in sediment and local depth. Linear regression analysis demonstrated inverse relation of Tanaidacea in response to OM (y = 0.6 - 0.62.OM and sand (y = 0.6 - 0.6.sand, and of Lopescladius in response to OM (y = 0.37 - 0.41.OM and sand (y = 0.37 - 0.46.sand. The fact that Peri lagoon has no marine influence and has Tanaidacea as the most abundant taxa, a group not expected in freshwaters, gives to this lagoon a particular relevance among coastal lagoons. The study concluded that sediment characteristics and local depth are more significant than water variables in determining the benthic community structure in Peri lagoon, which varied in accordance with different local conditions.OBJETIVO: O

  1. Inertial Screening in Sedimentation

    Science.gov (United States)

    Segre, P. N.; Curreri, Peter A. (Technical Monitor)

    2001-01-01

    Using particle image velocimetry we have measured the sedimentation dynamics of non-Brownian spheres over a wide range of Reynolds numbers (Re) between 0.001 and 2.5. Particle velocity fluctuations about the mean settling velocity show large-scale correlations whose spatial extent and magnitude Delta V/V are independent of Re up to a critical value Re less than Re(sub c). For Re greater than Re(sub c) the fluctuations substantially diminish with increasing Reynolds number due to inertial screening of the long-range hydrodynamic interactions (HI). The onset of inertial affects is found to occur when the Oseen length l(sub o)=v/V becomes of order the correlation length. In the inertial regime, the velocity fluctuations follow -(Delta V/V)(sup 2) approaching ln(Re), in agreement with an integration of the (l/r) HI over a narrow region extending up to the Oseen length l(sub o). A simple "blob" model connects the measured correlation lengths to the magnitudes of the velocity fluctuations.

  2. Spatial distribution of palynomorphs in the surface sediments of the Lagoa do Campelo lake, North region of Rio de Janeiro State, Brazil Distribuição espacial de palinomorfos na superfície dos sedimentos de fundo da Lagoa do Campelo, região Norte do Estado do Rio de Janeiro, Brasil

    Directory of Open Access Journals (Sweden)

    Cynthia Fernandes Pinto da Luz

    2005-12-01

    Full Text Available Four samples of the surface sediments of the Lagoa do Campelo lake bottom were collected in a transect of 500 m by 500 m from edge to edge, in a northeast/southwest direction, the dominant wind direction in the region. The analysis of pollen grains, fern spores and algae were used to evaluate their spatial deposition and level of deterioration. In total, 58 types of pollen grains were identified, mainly from herbs as Cyperaceae, Poaceae and Typhaceae. Pollen grains occurred in all the analyzed sediments. The area of highest concentration was the northeast side of the lake. The southwest side showed the highest pollen grain and fern spore degradation and mechanical damage, probably as they were carried across the lake by wind-driven currents, confirming the depositional tendency of damaged palynomorphs in the same direction as the dominant wind. Among the pollen of trees and shrubs, Alchornea, Arecaceae, Cecropia, Celtis, Clethra and Myrtaceae were dominant at more than 1,000 pollen grains per gram of sediment. The quantity of fern spores was practically constant in all samples (± 10% of the total of palynomorphs. The algae Pediastrum tetras (Ehrenberg Ralfs and Mougeotia occurred in all samples, but Spirogyra only in three of them. The results obtained gave new information about the richness, concentration and distribution of palynomorphs in the lake, representing the local and regional vegetation.Quatro amostras do sedimento superficial de fundo da Lagoa do Campelo foram coletadas em uma transecção de 500 m por 500 m de uma borda a outra, na direção nordeste/sudoeste, direção dominante dos ventos na região. A análise dos grãos de pólen, esporos de Pteridophyta e algas foi usada para a avaliação da variação espacial de deposição de palinomorfos e seus níveis de deterioração. No total, 58 tipos polínicos foram identificados. Em sua maioria foram de Cyperaceae, Poaceae e Typhaceae. Grãos de pólen ocorreram em todas as

  3. Palinomorfos de fungos e criptógamas em sedimentos quaternários de duas matas com Araucária, Planalto leste do Rio Grande do Sul, Brasil Palynomorphs of fungi and cryptogams in Quaternary sediments from two Araucaria forests, Eastern Plateau of Rio Grande do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Caroline Scherer

    2008-03-01

    Full Text Available Pólen, esporos e demais palinomorfos preservados em sedimentos são material de referência básico em estudos paleoambientais. A presente pesquisa tem como objetivo apresentar a taxonomia de palinomorfos correspondentes a fungos e criptógamas contidos em sedimentos do interior de duas matas com Araucária do Planalto leste do Rio Grande do Sul e, assim, fornecer subsídios para reconstituições paleoambientais na região. A análise envolveu amostras de dois perfis sedimentares holocênicos de São Francisco de Paula (perfil 1, Alpes de São Francisco, 132 cm; perfil 2, Banhado Amarelo, 101 cm, coletados com o Amostrador de Hiller. O processamento químico das amostras seguiu o método padrão, com HCl, HF, KOH, acetólise e montagem das lâminas em gelatina-glicerinada. A análise foi realizada em microscopia óptica. São apresentados palinomorfos de oito fungos, seis algas, cinco briófitos e 19 pteridófitos. A descrição de cada material é acompanhada de ilustrações e, sempre que possível, de dados ecológicos do organismo de origem. A grande quantidade de palinomorfos distintos, bem preservados nos sedimentos, mostra a potencialidade deste material em oferecer informações ambientais relevantes, junto com grãos de pólen, no estudo da gênese e expansão da mata com Araucária.Pollen, spores and other palynomorphs preserved in sediments are basic reference material for palaeoenvironmental studies. The aim of this research is to present the taxonomy of fungal and cryptogamic palynomorphs contained in sediments from two Araucaria forests on the Eastern Plateau of Rio Grande do Sul, thus contributing to palaeoenvironmental reconstitution in the region. The analysis involved samples from two Holocene sedimentary profiles from São Francisco de Paula (profile 1, Alpes de São Francisco, 132 cm; profile 2, Banhado Amarelo, 101 cm, collected with a Hiller Sampler. Chemical processing of the samples followed standard methodology, using

  4. Haw River sediment quality assessment

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report documents an evaluation of chemical contaminants in, and toxicity of, sediments collected from impoundments created by dams on the Haw River in Alamance...

  5. Cable Bacteria in Freshwater Sediments

    DEFF Research Database (Denmark)

    Risgaard-Petersen, Nils; Kristiansen, Michael; Frederiksen, Rasmus

    2015-01-01

    In marine sediments cathodic oxygen reduction at the sediment surface can be coupled to anodic sulfide oxidation in deeper anoxic layers through electrical currents mediated by filamentous, multicellular bacteria of the Desulfobulbaceae family, the so-called cable bacteria. Until now, cable...... bacteria have only been reported from marine environments. In this study, we demonstrate that cable bacteria also occur in freshwater sediments. In a first step, homogenized sediment collected from the freshwater stream Giber Å, Denmark, was incubated in the laboratory. After 2 weeks, pH signatures...... marine cable bacteria, with the genus Desulfobulbus as the closest cultured lineage. The results of the present study indicate that electric currents mediated by cable bacteria could be important for the biogeochemistry in many more environments than anticipated thus far and suggest a common evolutionary...

  6. Hydrodynamic separator sediment retention testing.

    Science.gov (United States)

    2010-03-01

    Hydrodynamic separators are widely used in urban areas for removal of suspended sediments and floatables from : stormwater due to limited land availability for the installation of above ground stormwater best management : practices (BMPs). Hydrodynam...

  7. Kanawha River Basin Sediment Data

    Data.gov (United States)

    U.S. Environmental Protection Agency — This data set contains sediment size