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Search Results: 1 - 10 of 57412 matches for " Carlos Ronald Pessoa;Marinho "
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Remo??o biológica de fenol por uso de reator contínuo com inóculo de Aspergillus niger
Pinheiro, Zuleika Bezerra;Rodrigues, Kelly;Pessoa-Wanderley, Carlos Ronald;Araújo, Rinaldo dos Santos;Marinho, Glória;
Engenharia Sanitaria e Ambiental , 2010, DOI: 10.1590/S1413-41522010000100006
Abstract: in this work, an aqueous mean containing 250 mg/l of phenol and macro and micro nutrients was submitted to treatment in a continuous fixed bed reactor inoculated with the aspergillus niger. the reactor was operated under eight hours of hydraulic detention, divided into two feeding phases in the presence (phase i) and absence (phase ii) of 0.5 g/l of glucose in the mean. the organic matter removal, measured in chemical demand of oxygen and phenol were of 92% and 99% in phase i, and 77% of organic matter and phenol in phase ii. the loss of the efficiency observed in the phase ii was attributed to extreme production of biomass and mucilage inside the reactor and for the reduction of the enzymatic activity of the involved microorganisms in the process.
Remo??o de corante por uso de Aspergillus niger AN400 em reator em bateladas sequenciais
Rodrigues, Kelly;Silva, Karla Mayara Lima da;Silva, Glória Maria Marinho;Lima, Paulo Cesar Cunha;Wanderley, Carlos Ronald Pessoa;Silva, Germana Marinho;
Química Nova , 2011, DOI: 10.1590/S0100-40422011000700003
Abstract: a sequential batch reactor (4 l) inoculated with aspergillus niger was operated in order to remove congo red dye (10 mg l-1). the feeding of the reactor was done to each 7 days. the glucose was added in the concentration of 1 g.l-1 (stage i) and 0.5 g l-1 (stage ii). the stage iii occurred without glucose addition. the stage i was great to process, because the system reached the greater dye removal (95%) as well as the kinetic parameters ware the best - km (0.7 g l-1) and k1 (0.025 h-1).
Viabilidade do tratamento de água residuária sintética têxtil em reator aeróbio de leito fixo
Rodrigues, Kelly;Vidal, Carla Bastos;Barbosa, Bárbara Chaves Aguiar;Pessoa-Wanderley, Carlos Ronald;Duarte, Iolanda Cristina Silveira;Marinho, Glória;
Engenharia Sanitaria e Ambiental , 2010, DOI: 10.1590/S1413-41522010000100012
Abstract: a continuous flow reactor, inoculated with aspergillus niger an400, with total volume of 5 l was operated at 29oc, with eight hours of retention hydraulic time and 150 l.h-1 of air flow rate in order to remove 25 mg.l-1 of congo red dye from a synthetic wastewater. the feeding of the reactor, inoculated with aspergillus niger an400, was done in two phases: phase i, with 0,5 g/l of saccharose and phase ii, with no saccharose. in phase i, it was possible to verify efficiencies of organic matter and color (mg pt.l-1) removal of 80 ± 16% and 82 ± 10%, respectively. in phase ii, the efficiency of organic matter removal was 75 ± 13% and color removal was 89 ± 7%. the higher removals of nutrients were achieved by the reactor in phase i with 25% to ammonia, 90% to nitrite, 93% to nitrate and 21% to phosphorus. apparently, the presence of saccharose improved the removal of the nutrients.
Tratamento de água com hidrocarbonetos aromáticos por uso de reator em bateladas sequenciais com inoculo fúngico
Rodrigues, Kelly;Oliveira, Patrícia Celestino Carvalho de;Amaral Júnior, Francisco Wilame;Siqueira, Jo?o Paulo da Silva;Araújo, Rinaldo dos Santos;Wanderley, Carlos Ronald Pessoa;Marinho, Glória;
Engenharia Sanitaria e Ambiental , 2012, DOI: 10.1590/S1413-41522012000200005
Abstract: a batch reactor with air and immobilized biomass of aspergillus niger an400 was operated during 10 cycles of 7 days to remove benzene (200 mg.l-1), toluene (200 mg.l-1), and xylene (50 mg.l-1) - btx - and nutrients from basal medium. the reactor was weekly fed with 4 l of the medium and glucose - 1 g.l-1 (phase i) and 0.5 g.l-1 (phase ii). the btx had been detected until the fourth day of operation in all cycles. the best efficiencies of removal had been in phase i: 75% of soluble organic matter, 80% of orthophosphate and 77% of ammonia. the reactor can be a viable alternative for the contaminated water treatment with btx. however it has the necessity to study behavior of the reactor during longer period of operation and with shorter reaction cycles, as well as the identification of the produced metabolites.
Spatial and temporal distribution of the gastropod Heleobia australis in an eutrophic estuarine system suggests a metapopulation dynamics  [PDF]
Carlos Alejandro Echeverría, Raquel A. F. Neves, Leandro A. Pessoa, Paulo C. Paiva
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.28108
Abstract: Hydrobiidae is one of the most diverse taxa among limnic and estuarine mollusks. Patterns of spatial and seasonal distribution of Heleobia australis were studied in ten stations over two years, in the urban eutrophic bay of Guanabara, Rio de Janeiro, Brazil. Spatial dispersal strategies in adults of this species, analyzed in the laboratory, revealed three patterns: 1) mobility on soft sediments; 2) mobility on hard substrata; and 3) the ability to lift from the bottom to the surface, to again sink down. This facilitate species movement from one location to another by surface currents or attached to floating debris. Thus, individuals are able to escape from an impacted area and further re-colonize other patches after recovering from local impacts. The hypothesis of metapopulation dynamics (source– sink) was analyzed. Two stations with high and constant numbers of individuals were grouped and tested as possible ‘sources’. The number of specimens in the remaining stations was highly variable, even with the complete disappearance and posterior highly dense re-occurrence of the mollusk, whereby these were tested as possible ‘sinks’. Results derived from nested ANOVA supported the hypothesis of metapopulation dynamics in the case of H. australis adults, ex-pressed through opportunistic-species domi- nation of a highly impacted estuarine system, such as Guanabara Bay.
As diferentes faces da raz o (II). Risco, ciência e peritos The different face of reason (II). Risk, science, and experts Les différentes faces de la raison (II). Risque, science et experts
C. M. Novais Madureira,Carlos Marinho Rocha
Revista Crítica de Ciências Sociais , 2012, DOI: 10.4000/rccs.1235
Abstract: Em texto anterior argumentou-se contra os excessos do cientismo com que, na linha de Sokal e Bricmont, António Manuel Baptista ataca as análises sociológicas dos processos e produtos da ciência, nomeadamente as posi es de Boaventura de Sousa Santos. Neste outro texto, pretende-se contestar AMB e os sokalistas no seu próprio campo, o da ciência pura e dura, mostrando que eles próprios n o compreendem o estatuto das suas ciências, e tentando ponderar afirma es menos precisas, frequentes na análise da sociogénese da ciência. Trazendo a discuss o para o nosso tempo, abordaremos também uma problemática n o tratada no texto anterior, a do estatuto dos cientistas e tecnólogos enquanto peritos nas instancias de decis o. Por último, tratará de analisar-se como as controvérsias entre peritos, hoje t o frequentes, s o vividas no seio da comunidade científica e qual a evolu o que geram na própria prática pericial. In a previous text, the authors argued against the excessive scientism with which António Manuel Baptista, following Sokal and Bricmont, attacks the sociological analyses of scientific processes and products, especially the positions of Boaventura de Sousa Santos. The aim of the present text is to contest AMB and Sokalists in their own field, that of pure and hard science, showing how they themselves do not understand the status of their sciences, and seeking to reflect on less precise assertions, which often occur in the analysis of the sociogenesis of science. Bringing the discussion into our own time-period, they also address the question of the status of scientists and technologists as experts in decision-making bodies. Finally, they discuss how controversies among experts, increasingly frequent, are experienced within the scientific community, and the developments they generate in expert practice itself.
Efeitos da invas?o biológica de algaroba: Prosopis juliflora (Sw.) DC. sobre a composi??o e a estrutura do estrato arbustivo-arbóreo da caatinga no Município de Monteiro, PB, Brasil
Pegado, Cláudia Maria Alves;Andrade, Leonaldo Alves de;Félix, Leonardo Pessoa;Pereira, Israel Marinho;
Acta Botanica Brasilica , 2006, DOI: 10.1590/S0102-33062006000400013
Abstract: biological contamination is currently one of the main causes of biodiversity loss on the planet. the aim of this study was to evaluate the impacts caused by p. juliflora invasion on caatinga phytodiversity in monteiro municipality, in both the adult stratum and natural regeneration. twenty plots of 400 m2 were set up, 10 in a conserved caatinga fragment (environment i) and 10 in a caatinga area invaded by p. juliflora (environment ii). the invaded area was much poorer in relation to the conserved area for all parameters investigated. the impacts caused by the alien species were felt in structure as well in community biological diversity. the relative density of p. juliflora in the adult stratum of the invaded area was ca. 90%, which reflects its capacity to compete and eliminate other species. the shannon-weaver diversity index (h') had values of 2.81 and 0.61 for the adult component of environments i and ii, respectively. for natural regeneration, this index was 2.31 and 1.14 for the same sites. it was concluded that p. juliflora forms dense populations that grow along with native species, severely affecting the floristic composition, diversity and structure of autochthonous communities.
Lettuces (Lactuca sativa) parasites in markets and free fairs from Lages - Santa Catarina Parasitos em alfaces (Lactuca sativa) de mercados e feiras livres de Lages - Santa Catarina
Rosiléia Marinho de Quadros,Sandra Márcia Tietz Marques,Douglas Augusto Favaro,Viviane Borges Pessoa
Ciência & Saúde , 2008,
Abstract: Objective: To evaluate the contamination of lettuces (Lactuca saliva) with parasites of Public Health peculiar interest sold in Lages, Santa Catarina. Materials and Methods: A nonprobabilitic intentional sampling method was used, in which eight supermarkets and two public markets were selected according to their scope of activity and sales volume for the town. The 122 samples obtained from eight supermarkets and from two open-air markets were analyzed by the techniques of spontaneous sedimentation (Lutz), centrifugation and fluctuation in zinc sulphate (Faust), centrifugation and fluctuation in sucrose solution (Sheather) and modified Ziehl Neelsen coloration. Results: The total parasitism rate was 88.5% (108/122), 77% (94/122) in the supermarkets samples and 11.5% (14/122) in the open-air markets samples. The Lutz technique has detected 46.7% (57/122) infected lettuces; Sheather and Faust technique identified 31.1% (38/122) and 10.6% (13/122) of lettuces infected with eggs and/or oocysts of parasites, respectively. The Eimeria, Giardia e Entamoeba were the most prevalent genders. Conclusions: The analyzed samples presented low hygienic standards, showing that more intense sanitary inspection is needed during all stages of vegetable productive process. Objetivo: avaliar a contamina o por parasitos de interesse em Saúde Pública em alfaces (Lactuca sativa) comercializadas no município de Lages, Santa Catarina. Materiais e Métodos: Foi utilizado um processo de amostragem intencional, selecionando-se oito supermercados e duas feiras, de acordo com a abrangência e volume de vendas desses estabelecimentos para a cidade. Foram processadas 122 amostras de alfaces, pelas técnicas de sedimenta o espontanea (Lutz), centrífugo-flutua o em sulfato de zinco (Faust), centrífugo-flutua o em solu o de sacarose (Sheather) e colora o de Ziehl Neelsen modificada. Resultados: O índice de parasitismo foi de 88,5% (108/122) com 77% (94/122) e 11,5% (14/122) para as amostras de supermercados e de feiras livres, respectivamente. A técnica de Lutz detectou 46,7% (57/122) de alfaces parasitadas; Sheather e Faust evidenciaram 31,1% (38/122) e 10,6% (13/122) de alfaces com ovos e/ou oocistos de parasitos, respectivamente. Predominaram os gêneros Eimeria, Giardia e Entamoeba. Conclus es: As amostras analisadas apresentaram baixos padr es higiênicos, necessitando de vigilancia sanitária mais atuante na fiscaliza o de todas as etapas do processo produtivo de hortali as.
Recovery Process on Soft-Bottom Macrobenthic Communities after Artificial Disturbance in Tropical Polluted Estuary (Guanabara Bay, Rio de Janeiro, Brazil)  [PDF]
Cecília do Valle Pinto Pereira, Leandro Amaro Pessoa, Marcos Aurélio Vasconcelos de Freitas, Carlos Alejandro Echeverría
Open Journal of Marine Science (OJMS) , 2013, DOI: 10.4236/ojms.2013.34018
Abstract:

The regime of disturbance with natural or anthropogenic origin can lead to the destabilization or even to a mass mortality of benthic communities. Due to the heterogeneity of the disturbance there is a formation of patches in different stages of ecological succession. The aim of this study is to follow and describe the resilience in artificial disturbed sediment in a polluted bay in Rio de Janeiro. The sediment was collected, sterilized and placed inside corers (10 cmdiameter ×15 cmheight) in the same place where it was collected. We allocated the samples in two structures, the difference between them was that one was placed closed to the bottom and the other was placed50 cmheight. We found 2352 organisms distributed in 14 taxons. The class Polychaeta and the order Amphipoda showed the highest density in all the survey and treatments. We identified the factors influencing the scenarium: different mechanisms of dispersal, the position of the structures and life history of each group. Disturbance can be the main cause of the patch’s diversity found in estuaries and coastal areas. Because of this, monitoring of selected areas becomes an important tool to understand the regime of disturbance as a key factor structuring benthic communities in soft sediment, also suggesting a metapopulation dynamics.

Diabetes mellitus: fatores associados entre usuários da Estratégia Saúde da Família Diabetes mellitus: factores asociados entre usuarios de la Estrategia Salud de la Familia Diabetes mellitus: associated factors among users of the Family Health Strategy
Niciane Bandeira Pessoa Marinho,Hérica Cristina Alves de Vasconcelos,Ana Maria Parente Garcia Alencar,Paulo César de Almeida
Acta Paulista de Enfermagem , 2012,
Abstract: OBJETIVO: Identificar os fatores associados ao Diabetes Mellitus tipo 2 (DM2) em usuários da Estratégia Saúde da Família (ESF) da cidade de Itapipoca-Ceará. MéTODOS: Estudo transversal, realizado no período de mar o/2009 a outubro/2010, em 11 unidades básicas de saúde, nas quais foram coletados dados sociodemográficos e clínicos de amostra de 419 usuários dessas unidades. RESULTADOS: Entre os participantes do estudo, 250 (59,7%) estavam com excesso de peso, 352 (84,0%) com obesidade central, 349 (83,3%) eram sedentários e 225 (53,7%) n o comiam frutas e/ou verduras diariamente. Houve associa o estatisticamente significante entre as variáveis obesidade central e sexo (p<0,001), idade (p=0,001) e estado civil (p<0,001); e entre investiga o nutricional e escolaridade (p=0,033) e classe econ mica (p=0,007). CONCLUS O: Diante dos fatores de risco modificáveis para DM2 identificados com maior prevalência sugere-se o desenvolvimento de interven es educativas para mudan as no estilo de vida dos indivíduos e o acompanhamento sistemático dessas mudan as, objetivando reduzir ou retardar o aparecimento da doen a. OBJETIVO: Identificar los factores asociados a la Diabetes Mellitus tipo 2 (DM2) en usuarios de la Estrategia Salud de la Familia (ESF) de la ciudad de Itapipoca-Ceará. MéTODOS: Estudio transversal, realizado en el período de marzo/2009 a octubre/2010, en 11 unidades básicas de salud, en las cuales fueron recolectados los datos sociodemográficos y clínicos de la muestra de 419 usuarios de esas unidades. RESULTADOS: Entre los participantes del estudio, 250 (59,7%) estaban con exceso de peso, 352 (84,0%) con obesidad central, 349 (83,3%) eran sedentarios y 225 (53,7%) no comían frutas y/o verduras diariamente. Hubo asociación estadísticamente significativa entre las variables obesidad central y sexo (p<0,001), edad (p=0,001) y estado civil (p<0,001); y entre investigación nutricional y escolaridad (p=0,033) y clase económica (p=0,007). CONCLUSIóN: Frente a los factores de riesgo modificables para DM2 identificados con mayor prevalencia se sugiere el desarrollo de intervenciones educativas para cambios en el estilo de vida de los individuos y el acompa amiento sistemático de esos cambios, objetivando reducir o retardar la aparición de la enfermedad. OBJECTIVE: To identify factors associated with type 2 diabetes (DM2) in users of the Family Health Strategy (FHS) in the city of Itapipoca, Ceará (Brazil). METHODS: A transversal study, conducted during the period from March/2009 to October/2010, in 11 basic health units, in which sociodemographic and clinical
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