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Sample records for avaliacao clinica da

  1. Leitura rapida do KDIGO 2012: Diretrizes para avaliacao e manuseio da doenca renal cronica na pratica clinica

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    Gianna Mastroianni Kirsztajn

    2014-03-01

    Full Text Available Os autores desta "leitura rápida" apresentam os dados que consideraram mais relevantes na versão 2012 do KDIGO referente à avaliação e manuseio da doença renal crônica. Não se trata da opinião dos autores, mas sim de uma apresentação mais concisa das diretrizes, que podem ser úteis na prática clínica.

  2. System precision assessment ExacTrac 6D® BrainLab of the Hospital das Clinicas da Faculdade de Medicina da USP; Avaliacao da precisao do sistema Exactrac 6D® BrainLab do Hospital das Clinicas da Faculdade de Medicina da USP

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    Maistro, Carlos E.B., E-mail: carloseduardo.bravinmaistro@gmail.com [Programa de Residencia Multiprofissional em Fisica Medica, Faculdade de Medicina de Sao Paulo, SP (Brazil); Nakandakari, Marcos V.N.; Ribeiro, Victor A.B.; Sales, Camila P. de; Rodrigues, Laura N. [Universidade de Sao Paulo (USP), SP (Brazil). Instituto de Radiologia. Servico de Radioterapia. Hospital das Clinicas

    2015-08-15

    The goal of this study was to evaluate the precision of ExacTrac 6D® Brainlab system, installed at Hospital das Clinicas da Faculdade de Medicina da USP, in frameless radiosurgery treatments. Four sets of tests were performed for different purposes in order to assess the following parameters: the accuracy of location through infrared system; evaluation of the reproducibility of fusion algorithm; evaluation of the X-ray system; and the end-to-end test with the goal of assess the overall accuracy of the system. It was found that the infrared system showed a maximum deviation of 0.5 mm in terms of positioning and the X-ray system showed a precision of 0.15 mm and 0.6°. The reproducibility of fusion algorithms provided a maximum deviation in position which was less than 0.5 mm and 0.5° and the quantitative analysis of the results for end-to-end test showed an overall accuracy of the system better than 0.8 mm. (author)

  3. Corrimentos vaginais em gestantes: comparacao da abordagem sindromica com exames da pratica clinica da enfermagem

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    Thais Marques Lima

    2013-12-01

    Full Text Available Estudo avaliativo de abordagem quantitativa, com amostra de 104 gestantes, com o objetivo de comparar os achados de infecções vaginais em gestantes obtidos por meio do fluxograma de corrimento vaginal com exames presentes na prática clínica da Enfermagem. Os dados foram coletados por meio de entrevista e exame ginecológico realizados de janeiro a julho de 2011. O fluxograma não se mostrou eficaz na identificação de candidíase e tricomoníase, apresentou baixa sensibilidade (0,0%; 50% e valor preditivo positivo (0,0%; 3,6% para as duas infecções e baixa especificidade para tricomoníase (46%. Mostrou-se satisfatório para vaginose bacteriana, com alta sensibilidade (100%, valor preditivo negativo (100% e acurácia (74%. Conclui-se que o emprego do fluxograma precisa ser reavaliado, visto que não foi eficaz em identificar infecções importantes em gestantes. Os esforços para o desenvolvimento de testes eficazes devem ser contínuos, com intuito de prevenir a disseminação de infecções e reduzir tratamentos desnecessários.

  4. Evaluation of skin entry kerma in radiological examinations at the Hospital de Clinicas, Parana, Brazil; Avaliacao de kerma de entrada na pele em exames radiologicos no Hospital de Clinicas do Parana, Brasil

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    Porto, Lorena E.; Schelin, Hugo R.; Santos, Amanda C. dos; Bunick, Ana Paula; Paschuk, Sergei; Denyak, Valeriy [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Tilly Junior, Joao G. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Hospital de Clinicas; Khoury, Helen J., E-mail: khoury@ufpe.b [Universidade Federal de Pernambuco (UFPE/DEN), Recife, PE (Brazil). Dept. de Energia Nuclear

    2011-10-26

    This paper evaluates the skin entry dose of pediatric and adults patients when submitted to radiological examinations at the Hospital de Clinicas do Parana, Brazil, as part integrate of the data assessment of International Atomic Energy Agency (IAEA) for Latin America. It was performed measurements of dose for evaluation of skin entry kerma in pediatric patients in thorax AP/PA examinations, adults of thorax in AP/PA, cranio caudal mammography and median lateral and patients of computerized tomography in examination of head, thorax and abdomen. The obtained data demonstrate the necessity of verification of diagnostic analysis standards. The great value amplitudes demonstrate the incompatibility of examination executions with those recommended by the literature. The dose values presented partially inside the range recommended and the other over the expected for the due examination when compared with the literature

  5. Avaliacao de projeto de promocao da saude para adolescentes

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    Jovino Oliveira Ferreira

    2013-06-01

    Full Text Available OBJETIVO: Avaliar programa de promoção de atividade física e de escolhas alimentares entre adolescentes. MÉTODOS: Estudo transversal realizado com 911 adolescentes de 13 a 18 anos de idade, de escolas públicas de Goiânia, GO, em 2010. Os participantes foram divididos em dois grupos: intervenção (escolas participantes do Projeto Viver Saudável e controle. Foram considerados como atividade física: deslocamento, aulas de educação física na escola, atividade física fora da escola e no lazer. Foram definidos como ativos aqueles que acumularam 300 ou mais minutos por semana. Quanto às escolhas alimentares, foi classificado como adequado o consumo de alimentos protetores em cinco ou mais dias da semana. Foram realizadas análises estatísticas com teste de Qui-quadrado de Pearson. RESULTADOS: A maioria dos adolescentes foi identificada como inativos ou insuficientemente ativos, com 65,7% no grupo intervenção e 65,2% no grupo controle, sem diferenças significativas entre os grupos e com prevalência maior entre o sexo feminino. Pouco mais da metade dos adolescentes consumiam alimentos protetores da saúde em cinco ou mais dias da semana, sendo 56,6% e 50,4%, respectivamente, nos grupos intervenção e controle (p = 0,373. CONCLUSÕES: A ausência de diferenças quanto a escolhas alimentares e prática de atividade física entre os grupos intervenção e controle indica que o projeto Viver Saudável precisa ser reavaliado visando melhorar a efetividade no cumprimento dos seus objetivos.

  6. Instrumentos em Lingua Brasileira de Sinais para avaliacao da qualidade de vida da populacao surda

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    Neuma Chaveiro

    2013-06-01

    Full Text Available OBJETIVO: Construir a versão em Língua Brasileira de Sinais dos instrumentos WHOQOL-BREF e WHOQOL-DIS para avaliar a qualidade de vida da população surda brasileira. MÉTODOS: Utilizou-se metodologia proposta pela Organização Mundial da Saúde (WHOQOL-BREF e WHOQOL-DIS para a construção dos instrumentos adaptados para população surda em Língua Brasileira de Sinais (Libras. A pesquisa para execução do instrumento consistiu de 13 etapas: 1 criação do sinal qualidade de vida; 2 desenvolvimento das escalas de respostas em Libras; 3 tradução por um grupo bilíngue; 4 versão reconciliadora; 5 primeira retrotradução; 6 produção da versão em Libras a ser disponibilizada aos grupos focais; 7 realização dos grupos focais; 8 revisão por um grupo monolíngue; 9 revisão pelo grupo bilíngue; 10 análise sintática/semântica e segunda retrotradução; 11 reavaliação da retrotradução pelo grupo bilíngue; 12 filmagem da versão para o software; 13 desenvolvimento do software WHOQOL-BREF e WHOQOL-DIS em Libras. RESULTADOS: Características peculiares da cultura da população surda apontaram a necessidade de adaptações na metodologia de aplicação de grupos focais quando compostos por pessoas surdas. As convenções ortográficas da escrita das línguas sinalizadas não estão consolidadas, o que trouxe dificuldades em registrar graficamente as etapas de tradução. As estruturas linguísticas que causaram maiores problemas de tradução foram as que incluíram expressões idiomáticas do português, muitas sem conceitos equivalentes entre o português e a Libras. Foi possível construir um software do WHOQOL-BREF e WHOQOL-DIS em Libras. CONCLUSÕES: O WHOQOL-BREF e o WHOQOL-DIS em Libras possibilitarão que os surdos se expressem autonomamente quanto a sua qualidade de vida, o que permitirá investigar com maior precisão essas questões.

  7. Avaliacao de interacoes medicamentosas potenciais em prescricoes da atencao primaria de Vitoria da Conquista (BA, Brasil

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    Danyllo Fabio Lessa Leao

    2014-01-01

    Full Text Available As interações medicamentosas são fatores de risco para a ocorrência de reações adversas a medicamentos. Este estudo teve o objetivo de avaliar as interações medicamentosas potenciais em prescrições da atenção primária de Vitória da Conquista (BA, visando preencher a lacuna de conhecimento sobre essa temática no Brasil. Foram coletadas informações sobre diversas variáveis de prescrições oriundas da atenção primária e as interações medicamentosas avaliadas a partir dos bancos de dados do Medscape e Micromedex(r. Verificou-se ainda a frequência de polifarmácia e associação desta com a ocorrência de interações medicamentosas. Os resultados mostraram frequência de 48,9% de interações medicamentosas, 74,9% delas de gravidade moderada ou maior, e 8,6% de prescrições em polifarmácia que, em teste qui-quadrado, mostrou associação positiva com ocorrência de interações medicamentosas potenciais (p < 0,001. As prescrições oriundas da atenção primária de Vitória da Conquista (BA apresentaram uma alta frequência de interações medicamentosas, porém faz-se necessária a análise de outros fatores de risco para ocorrência destas nesse nível de atenção à saúde.

  8. Avaliação clinica e radiografica da carie dental em escolares de região de agua fluoretada e submetidos a aplicação de fluor e selantes

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    Cristina Maria Dumit Sewell

    1990-01-01

    Resumo: O objetivo do presente trabalho foi avaliar clinica e radiograficamente a evolução do processo de carie em escolares de 6 a 8 anos de Piracicaba, SP, que bebiam agua fluoretada e foram submetidos a aplicação de fluor e selantes ... Observação: O resumo, na íntegra poderá ser visualizado no texto completo da tese digital Abstract: The aim of this study was to evaluate clinically and radiographically the evolution of the caries process in school children of 6 to 8 years old of Pirac...

  9. Avaliacao da Relacao entre a Doenca Hepatica Nao Gordurosa e CAD utilizando TCMF

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    Duran Efe

    2014-01-01

    Full Text Available Fundamento: Alguns fatores de risco para a aterosclerose são acompanhados pela doença hepática gordurosa não alcoólica (DHGNA. Desejamos usar a tomografia computadorizada multi-fatias (TCMF como a técnica para encontrar relação entre a DHGNA e a doença arterial coronariana (DAC. Objetivo: A relação entre a DHGNA e a DAC foi investigada através de TCMF. Métodos: Um total de 372 indivíduos com ou sem sintomas cardíacos, que foram submetidos à angiografia por TCMF, foram incluídos no estudo. Os pacientes foram divididos em dois grupos, de acordo com a presença da DHGNA. Os segmentos arteriais coronarianos foram avaliados visualmente via angiografia por TCMF. Com base no grau de estenose arterial coronariana, aqueles com placas ausentes ou mínimas foram considerados como normais, enquanto aqueles que apresentavam estenose de menos do que 50% e no mínimo uma placa foram considerados como portadores da doença arterial coronariana não obstrutiva (não-obsDAC. Os pacientes que apresentaram no mínimo uma placa e estenose arterial coronariana de 50% ou mais foram considerados como portadores de doença arterial coronariana obstrutiva (obsDAC. A DHGNA foi determinada de acordo com o protocolo de TCMF, utilizando a densidade hepática. Resultados: De acordo com a densidade hepática, o número de pacientes com doença hepática gordurosa não alcoólica (grupo 1 foi de 204 (149 homens, 54,8% e com fígado normal (grupos 2 foi de 168 (95 homens, 45.2%. Houve 50 (24,5% não-obsDAC e 57 (27,9% casos de obsDAC no Grupo 1, e 39 (23,2% não-obsDAC e 23 (13,7% casos de obsDAC no Grupo 2. Conclusões: O presente estudo utilizando TCMF demonstrou que a frequência da doença arterial coronariana em pacientes com NAFDL foi significativamente superior do que nos pacientes em NAFDL.

  10. Avaliacao da seguranca de diferentes doses de suplementos de acido folico em mulheres do Brasil

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    Quenia dos Santos

    2013-10-01

    Full Text Available OBJETIVO Avaliar a distribuição da ingestão de ácido fólico e a segurança de diferentes doses de suplementos em mulheres em idade reprodutiva. MÉTODOS Foram utilizados dados de consumo a partir de dois dias não consecutivos de registro alimentar de 6.837 mulheres em idade reprodutiva (19 a 40 anos participantes do Inquérito Nacional de Alimentação, módulo da Pesquisa de Orçamentos Familiares 2008-2009. Médias e percentis de consumo habitual de folato natural e ácido fólico foram estimados utilizando o método do National Cancer Institute . Cinco cenários foram simulados somando-se diferentes doses diárias de fortificação (400 mcg, 500 mcg, 600 mcg, 700 mcg e 800 mcg ao ácido fólico oriundo dos alimentos consumidos pelas mulheres. Comparou-se o total de ácido fólico (dieta + suplemento com o nível máximo de ingestão tolerável (UL = 1.000 mcg para definir a dose segura de suplementação. RESULTADOS Mulheres com ingestão habitual de ácido fólico acima do nível máximo de ingestão tolerável foram observadas para doses de suplemento de 800 mcg (7,0% das mulheres. Abaixo desse valor, qualquer dose de suplementação mostrou-se segura. CONCLUSÕES O uso de suplementos de até 700 mcg de ácido fólico mostrou-se seguro.

  11. Avaliação da qualidade da dieta pelo Índice de Alimentação saudável e suas variações: uma revisão bibliográfica.

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    Previato, Helena Dória Ribeiro de Andrade; Volp, Ana Carolina Pinheiro; Freitas, Renata Nascimento de

    2014-01-01

    O Indice de Alimentacao Saudavel (IAS) e um indicador da qualidade da dieta desenvolvido de acordo com as diretrizes alimentares americanas. De uma maneira geral, os indices de avaliacao da qualidade da dieta, a exemplo do IAS e suas variacoes, sao instrumentos usados para analisar e guiar a ingestao de nutrientes e de grupos de alimentos. A composicao dos indices tem sido constantemente atualizada e revisada de acordo com as recomendacoes de guias alimentares e diretrizes nutricionais especi...

  12. Book review. Semeiologia Clinica Veterinaria. (a cura di Paolo Ciaramella

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    Manuel Graziani

    2014-09-01

    Full Text Available Il grado di specializzazione raggiunto nel settore clinico veterinario non è dissimile da quello presente in campo umano, soprattutto se si pensa agli animali d'affezione che sono oramai considerati parte integrante di una società moderna e civile in cui anche il fattore benessere animale ha acquisito importanza non secondaria, in particolare nell'allevamento degli animali da reddito. In questo contesto è sempre più richiesta la figura di uno specialista competente e aggiornato, in grado di risolvere in modo adeguato le problematiche che gli vengono proposte, in un mercato in concorrenza che non contempla imperizia, inesperienza e ignoranza professionale. Lo studio della semeiologia clinica è uno dei primi passi di questo lungo e affascinate cammino che permette di apprendere un metodo di analisi sistematico, affidabile, efficiente e accurato per educare il futuro medico veterinario verso le procedure della buona pratica clinica. La semeiotica insegna ad allenare i propri sensi: a guardare attraverso l'osservazione diretta e indiretta, a sentire ascoltando suoni o rumori, a percepire sensazioni tattili e, non da ultimo, a saper discernere con cognizione e competenza quando ricorrere alle indagini strumentali e di laboratorio; sempre e comunque nella consapevolezza che non possono in nessun modo sostituire l'esame fisico diretto del paziente. Paolo Ciaramella, professore ordinario di Clinica Medica Veterinaria all'Università Federico II di Napoli, presenta così il volume che ha curato: "L'idea di questo libro ha preso forma durante un simposio di medicina interna tenutosi a Torino nel 2008. Con alcuni colleghi presenti si pensò alla possibilità di elaborare un nuovo testo di Semeiotica Medica che potesse ampliare e aggiornare il glorioso Messieri e Moretti, non tanto perché esso avesse perduto il suo valore intrinseco, quanto piuttosto perché nel corso degli anni sono cambiate la patologia animale e con essa la semeiotica e la clinica

  13. Dermatoses pediátricas no Hospital das Clínicas da Universidade Federal de Pernambuco Pediatric dermatoses at the Clinicas Hospital, Federal University of Pernambuco

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    Josemir Belo dos Santos

    2004-05-01

    Full Text Available FUNDAMENTOS: Numerosas condições dermatológicas podem afetar a população pediátrica. Há poucos estudos sobre a dermatologia pediátrica no Brasil. OBJETIVOS: Estudar as dermatoses pediátricas no Hospital das Clínicas do Recife, Pernambuco - Brasil. MATERIAL E MÉTODOS: Durante o período de maio de 1999 a maio de 2000, foram analisados 307 prontuários de crianças atendidas no Ambulatório de Dermatologia da Universidade Federal de Pernambuco. Foram encontrados os dados referentes a caracterização individual, procedência, motivo da consulta, diagnóstico clínico laboratorial e tratamentos previamente realizados. RESULTADOS: As dermatoses alérgicas foram as mais freqüentes (17,64%, seguidas pelas desordens pigmentares (15,54% e infecções virais (13,44%. CONCLUSÃO: Os dados encontrados estão de acordo com a literatura. Quanto às infecções, representam um grande percentual dos casos analisados, devendo-se isso provavelmente ao baixo nível socioeconômico dos pacientes em estudo. A caracterização da epidemiologia dos problemas cutâneos em crianças deve ser uma prioridade de estudos futuros.BACKGROUND: Numerous skin conditions can affect the pediatric population. There are few studies on Pediatric Dermatology in Brazil. OBJECTIVES: To study the pediatric skin diseases at the Hospital das Clínicas in Recife, Pernambuco State - Brazil. MATERIAL E METHODS: From May 1999 to May 2000, 307 cases of children treated at the Dermatology Clinic of the Federal University of Pernambuco were studied. Details of the patients' features, origin, reason for consultation, clinical laboratory diagnosis and previous treatment were examined. RESULTS: Allergic dermatosis was the most frequent disease (17.64%, followed by disorders of pigmentation (15.54% and viral diseases (13.44%. CONCLUSION: This agrees with the literature. Infections represent a large percentage of cases studied and are probably due to the low socioeconomic level of the

  14. Avaliacao da espessura medio-intimal em pacientes com doenca renal cronica nao dialitica: estudo prospectivo de 24 meses

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    Andrea Gaspar Marcos

    2014-03-01

    Full Text Available Introdução: O aumento da espessura média-intimal (EMI avaliada por ultrassom é um preditor de risco cardiovascular na população geral. Porém, em pacientes com doença renal crônica nos estágios iniciais, essa associação ainda não está bem estabelecida. Objetivo: Avaliar a associação EMI com a ocorrência de eventos cardiovasculares e mortalidade em pacientes nos estágios iniciais da doença renal crônica. Métodos: A análise post hoc de uma coorte de pacientes nos estágios 2-4 da DRC. Foram avaliados dados laboratoriais, ultrassom da artéria carótida e tomografia coronariana no início do estudo e a ocorrência de óbito, em seguimento por 24 meses. Resultados: Um total de 117 pacientes (57 ± 11 anos, 61% sexo masculino foram avaliados. A taxa de filtração glomerular foi 36 ± 17 mL/min, 96% dos pacientes eram hipertensos, 23% diabéticos e 27% obesos. Calcificação arterial coronariana esteve presente em 48% dos pacientes, sendo mais prevalente em pacientes nos estágios mais avançados da DRC (p = 0,02. EMI foi 0,6 mm (0,4-0,7 mm. Comparado aos pacientes com EMI < 0,6mm, aqueles com EMI ≥ 0,6 mm eram mais velhos (p = 0,001, apresentavam maior prevalência do sexo masculino (p = 0,001, menor taxa de filtração glomerular (p = 0,01 e maior proporção de pacientes com calcificação (p = 0,001. Não foi observada relação entre a espessura média-intimal e a ocorrência de evento cardiovascular e óbito. Conclusão: A espessura médio-intimal em pacientes DRC se associou à calcificação coronariana, mas não à ocorrência de eventos cardiovasculares e óbito, em um seguimento de 24 meses.

  15. Clinical and morphologic evaluation of Er:YAG laser action at the front of cervical dentinal hypersensitivity; Avaliacao clinica e morfologica da acao do laser de Er:YAG frente a hipersensibilidade dentinaria cervical

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    Rocha, Dalva Maria

    2001-07-01

    This work was achieved in vivo and in vitro to evaluate the efficiency of Er:YAG laser in the cervical dentinal hypersensitivity treatment (HSDC). The Clinical study was achieved in patients with HSDC. The treatment was realized in five sessions: the first for selection, the second for exams (clinic and X-Ray) and trying to remove the etiologic factors that could cause the HSDC. The third and fourth sessions were subjected to the radiation with that protocol: 60 mJ energy ,2 Hz frequency, 6 mm out of focus, under air cooling, 20 seconds each application which the same was repeated four times with one minute breaks, which scanning movements and without using anaesthetics. The fifth was evaluation. The patients were evaluated and registered in a subject scale of pain 0 to 3, in the beginning and end of each session of irradiation, and one month after the last session. The results showed that for the irradiated group occurs significant differences in the beginning of each session and between. For the control group did not occur significant differences in the beginning and after each session, but did show a difference between the sessions. As the control group as the irradiated group, had reduction of sensibility between the session. For the morphologic study nine teeth were selected, 7 molars and 2 pre-molars from operative dentistry discipline. Half of the surface was irradiated with Er:YAG laser, the same protocol used in vivo, and the other half was used as a control without receiving any laser irradiation. Subsequently, specimens were prepared for SEM examinations. The results showed that laser treated surfaces showed a reduction of dentine tubular diameter with partial or total closure of the dentine tubules. For the control group, it was observed bigger amounts smear layer and open dentine tubular. The results obtained indicated that the Er:YAG laser can contribute to the HSDC treatment. (author)

  16. Nd:YAG laser in caries prevention: a clinical study; Avaliacao clinica da eficiencia do laser de Nd:YAG associado ao fluor fosfato acidulado na prevencao de caries de sulcos e fissuras de criancas e adolescentes

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    Boari, Heloisa Gomes Dimiranda

    2000-07-01

    The caries prevention by using laser irradiation has been investigated during the last 30 years. The Nd: YAG laser associated with acidulated phosphate fluoride has been shown as a very promising technique for enamel caries prevention. The aim of this work was to clinically evaluate the efficiency of Nd: YAG laser associated with acidulated phosphate fluoride in pit and fissure caries prevention of children and adolescents. In this work it was determined the dye that enhance the effect of Nd: YAG laser in enamel. It was selected 242 pre-molar and molar teeth from 33 children and adolescents, aged from 7 to 15 years old. The selected teeth were free from caries or decalcification marks (active white marks) to the clinical and radiographic exams. The teeth were divided into two groups: the first group was laser irradiated and their homologous remained as a control. The right side teeth were dye-assisted Nd:YAG laser irradiated. The dye solution was a moisture of dust coal and equal parts of water and alcohol. The irradiation conditions were 60 mJ/10 Hz, optical fiber in contact mode, with diameter of 300 {mu}m, resulting in an energy density of 84,9 J/cm{sup 2}. The oclusal surface of the teeth was completely irradiated, specially on the slopes and in the deepest part of the pits and fissures. This procedure was repeated three times. In the sequence it was applied the acidulated phosphate fluoride for 4 minutes. On the left side teeth - control group- only acidulated phosphate fluoride was applied for the same time. The final examination considered the presence of caries and active white marks after a period of one year. There were statistical significant differences (p < 0.01) between the lased + fluoride group and the non irradiated group. The present study concluded that the technique used in this work can be an alternative clinical method for caries prevention. (author)

  17. AIDS related thoracic lymphoma: evaluation by computed tomography; Linfoma toracico na sindrome da imunodeficiencia adquirida: avaliacao por tomografia computadorizada

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    Siciliano, Antonio Alexandre de Oliveira [Hospital Universitario Clementino Fraga Filho, Rio de Janeiro, RJ (Brazil). Servico de Radiodiagnostico; Marchiori, Edson [Universidade Federal, Rio de Janeiro, RJ (Brazil). Curso de Pos-graduacao em Radiologia

    2000-02-01

    The authors reviewed five cases of patients with acquired immunodeficiency syndrome (AIDS) related lymphoma to describe the thoracic findings on computed tomography. The patients were followed at Hospital Universitario Clementino Fraga Filho, Hospital Universitario Antonio Pedro and Hospital da Lagoa, from November, 1989 to March 1998. Epidemiological, clinical and pathological data from these patients were quiet variable and pulmonary nodules and masses, hilar and mediastinal lymphadenopathy, and thoracic wall masses were observed. AIDS related lymphomas involving the chest are pleomorphic and most commonly extranodal. (author)

  18. Assessment of natural radioactivity of sands in beaches from Great Vitoria, ES, Brazil; Avaliacao da radioatividade natural em areias das praias da Grande Vitoria, ES

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    Aquino, Reginaldo Ribeiro de

    2010-07-01

    In this work the concentrations of natural radionuclides {sup 226}Ra, {sup 232}Th and {sup 40}K were determined in superficial sand samples for 16 locations throughout the coast of the Great Victory, metropolitan region of the state of Espirito Santo, Southeast of Brazil. The assessed beaches were Manguinhos and Jacaraipe in Serra county, Camburi, Praia do Canto and Curva da Jurema in Vitoria county, Praia da Costa and Itapua in Vila Velha county, Setibao, Setibinha, Praia do Morro, Praia das Castanheiras and Areia Preta in Guarapari county and sand of the Paulo Cesar Vinha Reserve also located in Guarapari county. Three sand samples of each beach were sealed in 100 mL high density polyethylene flasks. After approximately 4 weeks in order to reach secular equilibrium in the {sup 238}U and {sup 2}'3{sup 2}Th series, the samples were measured by high resolution gamma spectrometry and the spectra analyzed with the WinnerGamma software. The self absorption correction was performed for all samples. The {sup 226}Ra concentration was determined from the weighted average concentrations of {sup 214}Pb and {sup 21}'4Bi, the {sup 232}Th concentration was determined from the weighted average concentrations of {sup 228}Ac, {sup 2}'1{sup 2}Pb and {sup 212}Bi and the concentration of {sup 40}K is determined by its single gamma transition of 1460 keV. The radium equivalent concentration and the external hazard index where obtained from the concentrations of {sup 226}Ra, {sup 232}Th and {sup 4}'0K. {sup 226}Ra concentrations show values varying from 3 +- 1 Bq.kg-1 to 738 +- 38 Bq.kg{sup -1}, with the highest values for the central locality of the Camburi beach. {sup 232}Th concentrations show values varying from 7 +- 3 Bq.kg{sup -1} to 7422 +- 526 Bq.kg{sup -1}, with the highest values for Areia Preta beach. {sup 40}K concentrations show values varying from 14 +- 6 Bq.kg{sup -1} to 638 +- 232 Bq.kg{sup -1}, with the highest values for Areia Preta beach

  19. Evaluation of quality control tools for patients submitted to IMRT; Avaliacao das ferramentas de controle da qualidade para pacientes submetidos ao IMRT

    Energy Technology Data Exchange (ETDEWEB)

    Lavor, Milton; Rodrigues, Laura N.; Silva, Marco A., E-mail: miltonlavor@gmail.com [Universidade de Sao Paulo (HCFMRP/USP), Sao Paulo, SP (Brazil). Hospital das Clinicas. Servico de Radioterapia

    2013-04-15

    Intensity modulated radiation therapy (IMRT) is currently being implemented in a rapidly growing number of centers in Brazil. As consequence many institutions are now facing the problem of performing a comprehensive quality control program before and during the implementation of IMRT in the clinical practice. This paper proposes a methodology for quality control and presents the results and evaluations of the data obtained from the proposed methodology. Ionization chamber and two-dimensional array detector were performed in IMRT treatment planning in order to assess the absolute value of the total dose of all fields. The relative total dose distribution of all fields was measured with a radiochromic film and a two-dimensional array in a phantom. A comparison between measured and calculated dose distributions was performed using the gamma-index method, assessing the percentage of points that meet the criteria of ±3% dose difference and ±3mm distance to agreement. As a result and review of 113 tested IMRT beams using ionization chamber and 81 using two-dimensional array, the proposal was to take an action level of about ±5% compared to the treatment planning systems and measurements, for the verification of the dose in a single point at the low gradient dose region. Analysis of the two-dimensional array measurements showed that the gamma value was <1 for 97.7% of the data and for the film the gamma value was <1 for 96.6% of the data. This work can establish action levels required for quality control program proposed and implemented in the Department of Radiotherapy - Hospital das Clinicas in Sao Paulo that allows an accurate delivery of dose in 'sliding-window' IMRT with micro multi leaf collimator. (author)

  20. Hiperprolactinemia : expressao clinica, hormonal e radiologica em pacientes femininas, antes e durante o tratamento clinico

    OpenAIRE

    Elaine Sangali Mallmann

    1993-01-01

    A hiperprolactinemia constitui-se num achado laboratorial que quando resultante de secreção inapropriada, pode indicar tanto um processo patológico orgânico, como uma desordem funcional reversível. Representa o distúrbio hipofisário mais frequentemente encontrado na prática clinica e constitui um dos aspectos mais importantes no estudo da endocrinologia da reprodução. As hiperprolactinemias de causas não fisiológicas são secundárias mais frequentemente a efeito farmacológico, presença de tumo...

  1. An evening at "La Clinica del Pueblo".

    Science.gov (United States)

    Shefsky, M L

    1986-01-01

    This article describes a typical evening at the Clinica del Pueblo in the Hispanic neighborhood of Adams-Morgan in Washington, D.c. The Clinical del Pueblo began operating in 1983 in response to the urgen medical needs of Central American refugees arriving in the Washington D.c. area. The refugees bring with them severe trauma, fear, and health problems caused by the civil was and exacerbated by inadequate or non-existant health services. Approximately 80,000 Salvadoran refugees live in the area. They do not receive adequate health care for 3 reasons. 1) Because the US goverment is unwilling to recognize them as true refugees, they live with the constant threat of deportatin back to the violence from which they have fled. 2) Refugees lack the ability to pay for private care. 3) Langauage and culture create frightening barriers to health care for the refugees. For those who do seek care, these barriers can lead to the inadequate or incomplete diagnoses and poor compliance and follow-up. Plenty International and the Central American Refugee Center responded to these problems by organizing a free clinic to provide not only medical care but also a training course for volunteers. The director of the clinic organizes the course, the classes are taught by a variety of people including the clinic's volunteer physicians, nurses, and public health educators as well as graduates of previus training courses and people from the wider community. The services of the clinic reach only a small portion of the population in need. However, the fact that free medical services are now available to some Central American refugees make the Clinica del Pueblo an important program.

  2. Evaluation of the natural radioactivity at sands of anomalous regions of Espirito Santo state, Brazil; Avaliacao da radioatividade natural em areias de regioes anomalas do Espirito Santo, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Aquino, Reginaldo Ribeiro de; Pecequilo, Brigitte Roxana Soreanu, E-mail: raquino@ipen.b, E-mail: brigitte@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-10-26

    The natural radioactivity in sands of anomalous regions of the state of Espirito Santo, Brazil, were calculated from the concentration of activity of {sup 40}K, {sup 225}Ra and {sup 232}Th for the places of south and central of Camburi, Curva da Jurema, Ilha do Boi, Setibinha, south and central area of Praia da Areia Preta, denominated Black Spot. The samples were sealed and measured by high resolution gamma spectrometry and after a expectation time pf 30 days, until to reach a radioactive equilibrium

  3. Gunshot wounds to the head. Correlations between CT and clinical findings, neurosurgical treatment and long-term sequels; Traumi cranio-encefalici da proiettile: correlazione tra tomografia computerizzata, clinica, trattamento neurochirurgico e sequele a distanza

    Energy Technology Data Exchange (ETDEWEB)

    Salzano, A.; Nocera, V. [Ospedale S. Giovanni di Dio, Frattamaggiore, NA (Italy). Servizio di Radiologia; De Rosa, A.; Nunziata, A. [Ospedale Loreto Mare, Neaples (Italy). Servizio di Radiologia; Rossi, E.; Brunese, L. [Universita' degli Studi Federico II, Neaples (Italy). Ist. di Scienze Radiologiche; Tuccillo, M. [Azienda Ospedaliera di Rilievo Nazionale A. Cardarelli, Neaples (Italy). Servizio di Radiologia; Grassi, R. [Seconda Universita' degli Studi, Neaples (Italy). Ist. di Radiologia

    2000-03-01

    With the aim of demonstrating the usefulness of computerised tomography (CT) findings in the planning of brain neurosurgery in gunshot victims, for prompt and successful treatment, 30 patients with brain gunshot wounds were examined with CT over 5 years. The mortality rate of firearm wounds of the skull base was 34% higher than that of the hemisphere; this is due to carotid hemorrhage and midbrain damage. Such traumas require emergency radiological diagnosis and neurosurgical treatment because of their severity and early irreversible complications. Complex operations and skilled surgeons may prevent disabling postoperative sequels. CT findings are indispensable and must be correctly interpreted. The radiologist and the neurosurgeon must collaborate closely and both must consider several diagnostic factors affecting surgical planning. [Italian] Scopo dello studio e' stato quello di dimostrare l'utilita' della semeiologia della tomografia computerizzata in relazione con la pianificazione dell'intervento neochirurgico, al fine di attuare con tempestivita' interventi chirurgici soddisfacenti e meno lesivi. Lo studio comprende 30 casi di lesioni cranio-encefaliche da arma da fuoco esaminate con tomografia computerizzata nel periodo di 5 anni. Materiali e metodi utilizzati sono analiticamente descritti. L'esperienza dimostra che nelle lesioni da arma da fuoco del basicranio si nota una mortalita' del 34% superiore rispetto a quelle piu' craniali come quelle emisferiche in relazione a emorragie carotidee e lesioni tronco-mesencefaliche. Tali traumi esigono diagnosi radiologica e terapia neurochirurgica d'urgenza per la gravita' e le precoci complicanze irreversibili. Cio' richiede interventi complessi e manualita' esperte e rapide al fine di evitare sequele postoperatorie invalidanti. La corretta e indispensabile interpretazione dei segni radiologici della tomografia computerizzata deve avvenire in stretta

  4. Avaliação clínica da vertebroplastia percutânea transpedicular Evaluación clinica de la vertebroplastia transpedicular percutánea Clinic evaluation of transpedicular percutaneous vertebroplasty

    Directory of Open Access Journals (Sweden)

    André Rafael Hubner

    2011-01-01

    Full Text Available OBJETIVO: Avaliar a eficácia do efeito analgésico da vertebroplastia com polimetilmetacrilato (PMMA e da estabilização vertebral obtida nos pacientes com fraturas vertebrais patológicas e realizar uma revisão detalhada da técnica da vertebroplastia percutânea, analisando suas indicações. MÉTODOS: Análise retrospectiva de 64 procedimentos de vertebroplastia percutânea em 46 pacientes. Foram realizadas avaliações dos prontuários e das radiografias pré e pós-operatórias e em nova consulta de rotina, na qual foi aplicado o questionário de dor (escala analógica visual da dor. RESULTADOS: Entre os 46 pacientes analisados, 37 (80,4% eram do sexo feminino e 9 (19,6% do sexo masculino, com média de idade de 71 anos (desvio-padrão +/- 9,2, variando de 50 a 90 anos. Foram operados 64 níveis, com predomínio do segmento toracolombar, sendo realizadas 17 (26,6% vertebroplastias a maioria em pedículos de T12. Trinta e um pacientes (67,4% apresentaram apenas um nível fraturado, 12 (26,1% apresentaram 02 níveis operados e três pacientes (6,5% apresentaram 03 ou mais níveis operados. O diagnóstico de osteoporose foi o mais comum (33 casos, 71,7%. Quanto ao alívio da dor no pós-operatório, houve um alto índice de satisfação de 90 a 100% em 37 (80% pacientes. CONCLUSÃO: A vertebroplastia demonstra ser um procedimento eficaz no tratamento da dor por fratura patológica de coluna, sendo tamb��m utilizada em investigação diagnóstica (biópsia óssea. É um procedimento seguro com baixas taxas de complicações.OBJETIVO: Evaluar la eficacia del efecto analgésico y estabilización vertebral de la vertebroplastia con polimetilmetacrilato (PMMA en pacientes con fracturas patológicas de la columna vertebral, y realizar una revisión detallada de la técnica de vertebroplastia percutánea, analizando sus indicaciones. MÉTODOS: Evaluación retrospectiva de 64 fracturas tratadas en 46 pacientes sometidos a vertebroplastia percut

  5. Ophthalmology emergency room at the University of São Paulo General Hospital: a tertiary hospital providing primary and secondary level care Pronto-Socorro de Oftalmologia do Hospital das Clinicas da Universidade de São Paulo: um hospital terciário para atendimento de nível primário e secundário

    Directory of Open Access Journals (Sweden)

    Regina de Souza Carvalho

    2007-01-01

    Full Text Available OBJECTIVE: To assess the need for emergency care in a tertiary hospital, in the Ophthalmology Emergency Room of the University of the São Paulo Medical School General Hospital. MATERIALS AND METHODS: A cross-sectional analytic study of the treatment complexity level was carried out in a readily available sample, n = 574, of patients seen at the Ophthalmology Emergency Room of the University of São Paulo Medical School General Hospital, during a typical week. RESULTS: Of the 574 treated patients, 69.0% of the cases were diagnosed as requiring a simple treatment for their problem. The most frequent diagnoses were related to ocular inflammation and infection (55.0%, mainly including conjunctivitis (29.4% and eyelid inflammations (10.5%. Next in frequency were ocular trauma (19.2%, particularly foreign bodies on the cornea (7.5% and blunt trauma (5.2%. Refractive errors (3.1% was the most prevalent diagnosis in the "other ocular modifications" category. CONCLUSION: Most of the cases (69.0% treated at the Ophthalmology Emergency Room of the University of São Paulo Medical School General Hospital could have been diagnosed and treated in primary or secondary care units. Also, the fact that return visits to check recovery are seen in the ER demonstrates the lack of referral services. The fact that patients come to a tertiary hospital with rather simple cases shows the poor structure of the Brazilian Public Healthcare System, which overloads the tertiary care facilities, where costs for human resources, materials, and other items are higher.OBJETIVO: Verificar a necessidade de atendimento em hospital terciário de casos emergenciais do Pronto-Socorro de Oftalmologia do Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo. MATERIAL E MÉTODO: Realizou-se um estudo transversal analítico em amostra prontamente acessível, n= 574, de pacientes emergenciais atendidos no Pronto-Socorro Oftalmológico do Hospital das Clínicas da

  6. Clinical evaluation of the low intensity laser antialgic action of GaAlAs ({lambda}=785 nm) in the treatment of the temporomandibular disorders; Avaliacao clinica da acao antialgica do laser em baixa intensidade de arseneto de galio e aluminio ({lambda}=785 nm) no tratamento das disfuncoes da articulacao temporo-mandibular

    Energy Technology Data Exchange (ETDEWEB)

    Sanseverino, Nelly Tichauer Maluf

    2001-07-01

    The therapy with laser emitting low intensity has been currently used in the most diverse fields of medicine as therapeutic conduct for pain. It is a non invasive, painless, non-thermal and aseptic type therapy, without any collateral effects, having a good cost/benefit relationship. However, for the therapy with low-intensity laser to result in positive effects, a correct diagnosis is fundamental, as well as a protocol of adequate application. n odontology, the majority of patients diagnosed with temporomandibular disorders (TMD), present pain and limitations in the movements of the jaw. In this work, a GaAlAs laser emitting low intensity, was used, {lambda}=785 nm, in patients having a dysfunction of the temporomandibular joint with a complaint of pain. Twenty patients were divided into two groups. The group treated received laser therapy in the temporomandibular articulations and in the muscles affected. The dose applied was 45 J/cm{sup 2}, while the ten patients in the control group received 0 J/cm{sup 2}, in a total of nine applications, carried out three times a week, during three weeks. he evaluation of the patients was made through clinical examinations of manual palpation of the masseter, temporal, cervical, posterior neck and sternocleidomastoid muscles, and measurements of opening and laterality of the mouth. The results obtained showed a diminishing of the pain and an increase of the mandibular mobility in the patients treated, when compared to the control group. These results point to this therapy as being an important tool in the treatment of pain in patients with a dysfunction in the TMJ, indicating this therapeutic modality as a co-adjuvant in these treatments. (author)

  7. Isolation of Pseudomonas aeruginosa strains from dental office environments and units in Barretos, state of São Paulo, Brazil, and analysis of their susceptibility to antimicrobial drugs Isolamento de cepas de Pseudomonas aeruginosa provenientes do meio ambiente e de equipos dentarios em clinicas dentarias em Barretos, São Paulo, Brasil; analises da susceptibilidade das cepas a drogas antimicrobianas

    Directory of Open Access Journals (Sweden)

    Ana Claudia de Oliveira

    2008-09-01

    Full Text Available A wide variety of opportunistic pathogens has been detected in the tubing supplying water to odontological equipment, in special in the biofilm lining of these tubes. Among these pathogens, Pseudomonas aeruginosa, one of the leading causes of nosocomial infections, is frequently found in water lines supplying dental units. In the present work, 160 samples of water, and 200 fomite samples from forty dental units were collected in the city of Barretos, State of São Paulo, Brazil and evaluated between January and July, 2005. Seventy-six P. aeruginosa strains, isolated from the dental environment (5 strains and water system (71 strains, were tested for susceptibility to six antimicrobial drugs most frequently used against P. aeruginosa infections. Susceptibility to ciprofloxacin, followed by meropenem was the predominant profile. The need for effective means of reducing the microbial burden within dental unit water lines is emphasized, and the risk of exposure and cross-infection in dental practice, in special when caused by opportunistic pathogens like P. aeruginosa, are highlighted.Uma ampla variedade de patógenos oportunistas tem sido detectadas nos tubos de alimentação de água dos equipos odontológicos, particularmente no biofilme formado na superfície do tubo. Entre os patógenos oportunistas encontrados nos tubos de água, Pseudomonas aeruginosa é reconhecida como uma das principais causadoras de infecções nosocomiais. Foram coletadas 160 amostras de água e 200 amostras de fomites em quarenta clinicas odontológicas na cidade de Barretos, São Paulo, Brasil, durante o período de Janeiro a Julho de 2005. Setenta e seis cepas de P. aeruginosa, isoladas a partir dos fomites (5 cepas e das amostras de água (71 cepas, foram analisadas quanto à susceptibilidade à seis drogas antimicrobianas freqüentemente utilizadas para o tratamento de infecções provocadas por P. aeruginosa. As principais suscetibilidades observadas foram para a

  8. Enterite da Campylobacter upsaliensis: un paradigma della microbiologia clinica

    Directory of Open Access Journals (Sweden)

    Maria Letizia D’Annibale

    2006-12-01

    Full Text Available The Authors describe a case of acute enteritis in a adult woman with severe hepatitis C infection caused by a strain of Campylobacter upsaliensis.The clinical isolate was obtained only on blood agar because filter membrane technique was performed. In fact for this strain it was no growth on selective Campy agar, which include cephalotin too; C. upsaliensis is sensitive to this antibiotic molecule. So, the use of filter membrane on blood agar or charcoal agar at 37°C in microaerophilic atmosphere is recommended for isolation of all campylobacters responsible of human enteritis.

  9. The first century of the "clinica del lavoro" in Milan.

    Science.gov (United States)

    Bertazzi, Pier Alberto; Foà, Vito

    2005-01-01

    The Clinica del Lavoro was created in Milan at the beginning of the 20th century by Luigi Devotto, who deemed it essential for physicians and health researchers to get involved in the life and health problems of working populations. The main roles of the Clinica del Lavoro were to educate medical students and train physicians; study actual workplaces, examine health and safety hazards and their noxious effects; and create initiatives and services to protect and promote workers' health. Important scientific contributions were made in several fields, including chemical carcinogenesis, effects of mineral and biologicalfibers, mechanism of action of silica dust, methods for the detection and measurements of toxic substances in both the work environment and workers' biological media.

  10. Dialogo tra Epistemologia Clinica ed Epistemologia antropologica

    Directory of Open Access Journals (Sweden)

    Maurizia Tinti

    2013-12-01

    Full Text Available Il viaggio può assumere funzioni diverse se osservato all’interno delle discipline psicoterapeutica e antropologica: da un lato è un tipo di cura, mentre dall’altro permette lo studio di culture altre. Questo confronto introduce la comparazione tra l’esperienza della follia e quella della cultura, analizzate attraverso lo sguardo critico di Foucault e della critica post-moderna in antropologia. Esperienze, queste, che hanno in comune il fatto di essere il prodotto di discorsività “scientifiche”, positiviste, che hanno assunto un certa autorità nel parlare di determinate alterità – il medico con il “suo” folle e l’antropologo con il “suo” selvaggio –, e che sono state esperite lungo la storia delle due discipline, particolarmente in età moderna, quando stabilirono il loro apparato epistemologico e metodologico. Con la post-modernità, si realizzò quindi una svolta epistemologica secondo cui il ricercatore e l’analisi da lui prodotta non possono essere oggettivi: tanto la soggettività dello studioso quanto quella dell’oggetto di analisi contribuiscono a modificare il contesto e l’interazione tra i soggetti. La psicoterapia e l’antropologia verranno quindi considerate sul piano fenomenologico, e la produzione di sapere diverrà polifonica e condivisa.

  11. Evaluation of home-made teas efficiency from medicinal plants used on childish diarrhea treatment; Avaliacao da eficacia de chas caseiros de plantas medicinais utilizados no tratamento da diarreia infantil

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, Magda Moreira; Silva, Maria Jose de Sousa Ferreira da [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Quimica; Vilhena Schayer Sabino, Claudia de; Amaral, Angela Maria [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil)

    1996-03-01

    The objective of this work is to verify whether the home-made teas form Brazilian plants, used for control of childish diarrhea have been efficient reaching the composition recommended by World Health Organizations (WHO). This work has been carried out using the neutron activation analysis and the TRIGA MARK I reactor, the IPR-R1, in the Centro de Desenvolvimento da Tecnologia Nuclear - CDTN. (author). 4 refs., 2 tabs.

  12. Evaluation of conventional x-ray diagnostic equipment and radiological protection systems of hospitals and clinics installed in Recife city, Brazil; Avaliacao dos equipamentos de raios-X diagnostico convencionais e dos sistemas de protecao radiologica de clinicas e hospitais da cidade de Recife

    Energy Technology Data Exchange (ETDEWEB)

    Passos, Robson Silva

    1999-05-15

    Diagnostic radiology is the main contributor to the man-made exposure of general population. Since Quality Assurance (QA) programs ensure high quality diagnostic images with the lowest possible radiation dose to the patient, it has been recommended that all introduce QA programs for their radiological facilities. Consequently it is important to check the adequacy of equipment operating parameters in diagnostic radiography facilities, to ensure that a high quality of service is delivered. The purpose of this study was to evaluate the operating conditions of diagnostic units installed in Recife, Pernambuco. The study included 31 X-ray units from both public and private diagnostic services. The following parameters were evaluated: coincidence between the luminous and radiation fields; alignment of the radiation beam; agreement between the real and preset values of kVp and exposure time; filtration; half value lower (HVL); luminance of the view box; uniformity of the luminance; illuminance of the environment. The results showed that 20% of the equipment surveyed exhibited discrepancies between the luminous and radiation fields greater than 2% of the source to skin distance. The test of kilovoltage showed that 48% of the units do not fulfill the acceptability criteria, presenting discrepancies higher than {+-} 10% between the measured and preset values. The results of the accuracy of the timer indicated that 81% of the equipment surveyed present a discrepancy greater than {+-} 10% between the time selected in the control panel and actual exposure time.The test of the filtration shown that, in 20% of the equipment, this was inferior to 2,5 mm Al. The test of the luminance of view box shown that 96% of the equipment, shown a luminance lower of 2.000 cd/m{sup 2}. Related to the test of the uniformity of the luminance, 81 % of the equipment shown a variation of the uniformity higher then 10%. The test of the iluminancy of the environment shown that 61 % of the equipment presented on iluminancy level out of the gap between 50 and 100 lux. The results of this survey showed that a high percentage of the equipment surveyed demonstrated inadequate operating conditions, reinforcing the need to implement quality control protocols in conventional x-ray units located in Recife. (author)

  13. Cefaleia pós-punção da dura máter

    OpenAIRE

    Veiga, R; Pinheiro, N; Vilaça, MJ; Morais, S; Carmona, C

    2012-01-01

    Apresenta uma revisão da anatomia, fisiopatologia,clinica, diagnóstico e tratamento das cefaleias pos punção da dura mater. Faz uma revisão da casuistica do serviço de anestesiologia em relação a esta entidade clinica e apresenta alguns casos clinicos de cefaleias para diagnóstico diferencial com as cefaleias pós punção da dura mater.

  14. Evaluation of the thermoluminescent detector answers of CaSO{sub 4}:Dy, LiF:Mg,Ti and micro LiF:Mg,Ti in photon clinical beams dosimetry using water simulator; Avaliacao da resposta de detectores termoluminescentes de CaSO4:Dy, LiF:Mg,Ti e microLiF:Mg,Ti na dosimetria de feixes clinicos de fotons utilizando simulador de agua

    Energy Technology Data Exchange (ETDEWEB)

    Matsushima, Luciana C.; Veneziani, Glauco R.; Campos, Leticia L., E-mail: lmatsushima@usp.b, E-mail: veneziani@ipen.b, E-mail: lcrodri@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (GMR/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Gerencia de Metrologia das Radiacoes; Sakuraba, Roberto K.; Cruz, Jose C. da, E-mail: rsakuraba@einstein.b, E-mail: jccruz@einstein.b [Sociedade Beneficente Israelita Brasileira, Sao Paulo, SP (Brazil). Hospital Albert Einstein (HAE)

    2011-10-26

    This paper perform the comparative study of thermoluminescent answer of calcium sulfate dosemeter doped with dysprosium (DaSO{sub 4}:Dy) produced by the IPEN, Sao Paulo, with answer of lithium fluoride dosemeters doped with magnesium and titanium (LiF:Mg, Ti) in the dosimetry of clinical beams of photons (6 and 15 MV) by using water simulator object. Dose-answer curves were obtained for gamma radiation of cobalt-60 in the air and in conditions of electronic equilibrium (plate of PMMA), and clinical photons of CLINAC model 2100C accelerators of the two evaluated hospitals: Hospital das Clinicas of the Faculty of Medicine of Sao Paulo university and Hospital Albert Einstein. It was also evaluated the sensitivity and reproduction of the three dosemeters

  15. Biblioterapia: uma experiência com pacientes internados em clinica médica/Bibliotherapy: an experience with patients interned in medical clinica

    Directory of Open Access Journals (Sweden)

    Eva Seitz

    2005-01-01

    Full Text Available O presente artigo tem por finalidade apresentar resultados do estudo biblioterapêutico, realizado com pacientes internados em clinica médica. O foco central foi verificar o nível de aceitação da leitura como atividade de lazer por pacientes internados em clínica médica. A prática biblioterapêutica com pacientes internados em clínica médica demonstrou ser útil no processo de hospitalização, como fonte de lazer e de informação, na interação biblioterapeuta/paciente/enfermagem e, no processo de sociabilização, além, de proporcionar momentos de descontração e alegria aos pacientes, contribuindo para o bem estar mental dos mesmos. O estudo aponta para o importante papel da leitura enquanto atividade de lazer para pacientes hospitalizados, humanizando o processo de hospitalização. The present article has for purpose to present resulted of the library-therapeutic study, carried through with patients interned in medical clinic. The central focus was to verify the reading acceptance as leisure activity by in-patients at Medical Clinic, through library-therapy practice. The library-therapy practice with in-patients at Medical clinic showed to be useful in the hospitalization process as leisure source and information, in library-therapist/patient/nursing interaction and, in the socialization process. Besides, it brought pleasant moments and joy to the patients, contributing for mental welfare of them. The study points out the important role of reading while leisure activity for hospitalized patients, humanizing the hospitalization process.

  16. Acta Clinica Croatica: progress of a journal step by step.

    Science.gov (United States)

    Ramljak, Gordana

    2014-03-01

    The journal Acta Clinica Croatica (ACC) was founded in 1962 under the title Anali Bolnice Dr. M. Stojanović. In 1995, the title of the journal was changed into its present form and ever since all papers have been published in English. In 2000, the electronic (online) edition of the ACC was released in addition to the print version. The paper presents development of the journal from 1962 to 2012 based on the analysis of the following SCOPUS citation index parameters: type and number of documents published in the journal; number of citations; and number of domestic and foreign authors. The studied period was analyzed in three time segments: the period from 1995 to 1999, the period from 2000 to 2006 and the period from 2007 to 2012. The same parameters were analyzed in the Web of Science/SCI-Expanded bibliographic and citation index for the 2007-2012 period. The increasing number of documents, authors (both domestic and foreign) and citations demonstrates gradual rise in the quality, visibility and impact of the journal. The fifty years of experience show that a goal, at first very distant and almost unachievable, may be reached by progressing step by step.

  17. Thermal hydraulic evaluation for an experimental facility to investigate pressurized thermal shock (PTS) in CDTN/CNEN; Avaliacao termo-hidraulica da montagem experimental de choque termico pressurizado do CDTN/CNEN

    Energy Technology Data Exchange (ETDEWEB)

    Palmieri, Elcio T.; Navarro, Moyses A.; Aronne, Ivam D.; Terra, Jose L. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil)

    2002-07-01

    The goal of the work presented in this paper is to provide necessary thermal hydraulics information to the design of an experimental installation to investigate the Pressurized Thermal Shock (PTS) to be implemented at Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN). The envisaged installation has a test section that represents, in a small scale, a pressure vessel of a nuclear reactor. This test section will be heated and then exposed to a PTS in order to evaluate the appearance and development of cracks. To verify the behavior of the temperatures of the pressure vessel after a sudden flood through the annulus, calculations were made using the RELAP5/MOD 3.2.2 gamma code. Different outer radiuses were studied for the annular region. The results showed that the smaller annulus spacing (20 mm) anticipates the wetting of the surface and produces a higher cooling of the external surface, which stays completely wet for a longer time. (author)

  18. Evaluation of the photovoltaic systems installed in the residences of the Cardoso Island, State of Sao Paulo, Brazil; Avaliacao dos sistemas fotovoltaicos instalados nas residencias dos moradores da Ilha do Cardoso, SP, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Zilles, R.; Morante, F.; Fedrizzi, M.C. [Sao Paulo Univ., SP (Brazil). Inst. de Eletrotecnica e Energia. Lab. de Sistemas Fotovoltaicos]. E-mail: zilles@iee.usp.br

    2000-07-01

    This work reports the results of a technical evaluation of Solar Home Systems project at Parque Estadual da Ilha do Cardoso, SP, Brazil. The systems belong to the CESP's commercial program called ECOWATT, initiated in 1997. During the visit were registered 75 systems (2 churches, 4 schools and 69 houses). In some houses were done tests of charge control operation and performance. The work shows some problems at the design and at the technical standard. In our valuation, some systems should have been smaller and some bigger depending the needs and the payment capacity of each family.In this sense, a study of caicara's way of living were missing, as well as its difference at social and economic class. The results revealed that many simple aspects, but important for the exit of the project were not take into account. (author)

  19. Evaluation of solubility in simulated lung fluid of metals present in the sludge from a metallurgical industry to produce metallic zinc; Avaliacao da solubilidade em liquido pulmonar simulado dos metais presentes no rejeito gerado por uma industria metalurgica de zinco

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Rosilda Maria Gomes de

    2012-07-01

    The objective of this study was to determine the solubility parameters (rapid and slow dissolution rates, rapid and slow dissolution fractions) metal particles present in a pile of sludge accumulated under exposure to weathering from the Cia Mercantil Inga, located at the Ilha da Madeira, Sepetiba Bay, Rio de Janeiro. Plant samples collected in the neighboring of the pile and bioindicators placed in the region and collected after some months indicated that the inhabitants of Ilha da Madeira have been exposed to trace elements such zinc, cadmium, mercury and lead, produced during the processing of zinc minerals (hemimorphite - Zn{sub 4}(OH){sub 2}Si{sub 2}O{sub 7}.H{sub 2}O, and willemite - Zn{sub 2}SiO{sub 4}). A static dissolution test in vitro was used to determine the solubility parameters using a simulated lung fluid (SLF), on a time basis ranging from 10 min to 1 year. The metal concentrations in the sludge samples and in the SLF were determined using Particle Induced X-rays Emission (PIXE). In conclusion, this study confirms the harmful effects on the neighboring population of the airborne particles containing these metals that came from the sludge. The solubility parameters obtained for Zn, Cd, Cr, Ni and Mn present in the rapid dissolution fraction in SLF were 0.945; 0.473; 0.226; 0.300 and 0.497, respectively, and the corresponding times for half life of dissolution of the rapid fraction were f{sub r} = 2.082 days; f{sub r} = 0.09 days; f{sub r} = 0.37 days; f{sub r} = 0.332 days ad f{sub r} = 0.99 days; for the slow dissolution fraction times were f{sub r} = 146.95 days; f{sub r} = 63 days; f{sub r} = 86.64 days; f{sub r} = 79.66 days and f{sub r} = 59.84 days. These values indicate that these metals present a moderate absorption level in SLF, and may be classified as M type, according to the International Commission on Radiological Protection (ICRP). The use of solubility parameters allowed a better description of the kinetic behaviour of the sludge in

  20. Construcao de subconjuntos terminologicos: contribuicoes a pratica clinica do enfermeiro

    Directory of Open Access Journals (Sweden)

    Jorge Wilker Bezerra Clares

    2013-08-01

    Full Text Available A Classificação Internacional para a Prática de Enfermagem (CIPE® é um sistema de classificação unificador dos elementos da prática de enfermagem (diagnósticos, resultados e intervenções, que possibilita elucidar elementos da linguagem própria da Enfermagem por meio da construção de subconjuntos terminológicos. Neste ensaio reflexivo, destacam-se aspectos relevantes para a construção de subconjuntos terminológicos CIPE®, bem como suas contribuições para a prática clínica do enfermeiro. Discute-se a elaboração de subconjuntos como ferramenta que contribui para a universalização da linguagem da Enfermagem, facilita o processo comunicativo, bem como o avanço científico e tecnológico da profissão. Portanto, incentiva-se seu uso por enfermeiros de todo o mundo.

  1. Determinação do prognostico de pacientes com lesão medular submetidos a estimulação eletrica neuromuscular e fisioterapia convencional, atraves da avaliação fisioterapica, avaliação clinica asia e potencial evocado somato-sensorial

    OpenAIRE

    Beatriz de Oliveira Peixoto

    2002-01-01

    Resumo: Este estudo avaliou o diagnóstico e o prognóstico de pacientes com lesão medular através do potencial evocado sômato sensorial (PESS), avaliação ASIA (classificação neurológica da lesão medular e medida de independência funcional (FIM) e escala de deficiência) e avaliação fisioterápica. O efeito da estimulação elétrica neuromuscular (EENM) foi comparado ao tratamento fisioterápico convencional (FC). Foram estudados 19 pacientes com lesão medular, com idade de 16 a 50 anos e de ambos ...

  2. OC ToGo: bed site image integration into OpenClinica with mobile devices

    Science.gov (United States)

    Haak, Daniel; Gehlen, Johan; Jonas, Stephan; Deserno, Thomas M.

    2014-03-01

    Imaging and image-based measurements nowadays play an essential role in controlled clinical trials, but electronic data capture (EDC) systems insufficiently support integration of captured images by mobile devices (e.g. smartphones and tablets). The web application OpenClinica has established as one of the world's leading EDC systems and is used to collect, manage and store data of clinical trials in electronic case report forms (eCRFs). In this paper, we present a mobile application for instantaneous integration of images into OpenClinica directly during examination on patient's bed site. The communication between the Android application and OpenClinica is based on the simple object access protocol (SOAP) and representational state transfer (REST) web services for metadata, and secure file transfer protocol (SFTP) for image transfer, respectively. OpenClinica's web services are used to query context information (e.g. existing studies, events and subjects) and to import data into the eCRF, as well as export of eCRF metadata and structural information. A stable image transfer is ensured and progress information (e.g. remaining time) visualized to the user. The workflow is demonstrated for a European multi-center registry, where patients with calciphylaxis disease are included. Our approach improves the EDC workflow, saves time, and reduces costs. Furthermore, data privacy is enhanced, since storage of private health data on the imaging devices becomes obsolete.

  3. [The role of the "Clinica del Lavoro Luigi Devoto" in international research].

    Science.gov (United States)

    Bertazzi, P A; Forni, Alessandra M

    2003-01-01

    During its long history, the Clinica del Lavoro Luigi Devoto has produced numerous internationally recognized scientific contributions in the specific field of occupational medicine and health, and in other broader areas as, for example, immunology, toxicology, cytogenetics. Pivotal in this activity was the figure of Enrico C. Vigliani, director of the Clinica for over 35 years. We mention here, in particular, the results of the study of "early" markers of lead intoxication; the research on the carcinogenicity of benzene and aromatic amines; the study of the pathogenesis of silicosis and byssinosis; the study of cytogenetic damage after exposure to industrial toxic chemicals; the technical research for dust abatement in mines. Such research also played a major role in the development of pulmonary medicine, toxicology and immunology in Italy, and conferred scientific dignity on the newborn "industrial hygiene" discipline thanks to the work of Nicola Zurlo. Today, the Clinica's research is maintained at international standards especially by the work of thematic Research Centers recently established within the Clinica, covering fields such as occupational and environmental toxicology, occupational oncology, ergonomics, respiratory disease and allergy, psycho-social risk factors. These Centers are also devoted to the development of innovative methods in epidemiology, toxicology, psychology, molecular biology, and ergonomic measurement for the identification and evaluation of health risks at work.

  4. Resultados do exame anátomo-patológico e "Polymerase Chain Reaction (PCR" na forma clinica e subclinica da infecção anal pelo Papilomavirus Humano (HPV: estudo em quatro grupos de pacientes Histopathological and PCR results for clinical and subclinical forms of HPV anal infection: study of four groups of patients

    Directory of Open Access Journals (Sweden)

    João Carlos Magi

    2006-12-01

    Full Text Available O Papilomavírus Humano tem alta incidência na população. O objetivo deste trabalho é o estudo dos resultados encontrados no exame anatomo-patológico e no PCR das formas clínica e subclínica da infecção anal por HPV em quatro grupos de pacientes. MÉTODO: Foram estudados 10 pacientes com prurido anal idiopático, seis com infecção genital pelo HPV, tratada, seis com condiloma anal tratado e oito com condiloma anal. As verrugas foram biopsiadas nos oito pacientes com condiloma e feito exame de anuscopia de alta resolução com biópsia dirigida nos outros 22 pacientes. O material foi encaminhado para exame anátomo-patológico e depois, a partir do mesmo bloco de parafina, foi feito o exame de PCR. Resultados: O anátomo-patológico foi positivo para HPV em todos os pacientes, sendo que nos oito com condiloma confirmou-se a forma clínica e em 22 diagnosticou-se a subclínica com 13 casos de neoplasia intraepitelial associada. O PCR foi positivo em 91,9% dos 22 pacientes da forma subclínica ao anátomo-patológico e em 87,5% dos oito pacientes da forma clínica. O tipo predominante nos casos de HPV anal subclínico foi o 16 e o predominante nas verrugas foi o 11. CONCLUSÕES: O exame anátomo-patológico foi positivo para HPV em todos os pacientes, propiciando também o diagnóstico de 13 casos de neoplasia intraepitelial, sendo dois de carcinoma "in situ". O PCR foi positivo em 91,9% dos pacientes da forma subclínica ao anátomo-patológico e em 87,5% da forma clínica ao anátomo-patológico. O tipo predominante da forma subclinica foi o 16 e das verrugas foi o 11.The purpose of this study is to analyze the results found in the pathological examination and PCR test for clinical and subclinical HPV anal infections in four groups of patients. Methods: The four groups studied were: ten patients with idiopathic anal pruritus, six with treated HPV genital infection, six with treated anal condyloma, and eight with anal condyloma. Eight

  5. Programa de tratamento integral de pacientes crônicos do Hospital de Clinicas da Universidade do Estado do Rio de Janeiro: I - Etapa diagnóstica A programme for comprehensive treatment of chronic hospital patients at the Rio de Janeiro State University Hospital: I - The diagnostic phase

    Directory of Open Access Journals (Sweden)

    Hésio de Albuquerque Cordeiro

    1977-03-01

    Full Text Available O estudo sobre redundância de hospitalização, baseado no conceito de dependência aos cuidados de enfermagem, evidenciou que, em 99 pacientes que permaneceram 25 ou mais dias internados, foram redundantes em algum momento da internação, representando um desperdício de 1094 leitos-dia (30,17% do total de leitos-dia consumidos por este grupo de pacientes . Estudou-se, também, um grupo de 102 pacientes com acompanhados durante uma semana, identificando-se 60 pacientes (59% com hospitalização desnecessária. Não se verificou diferenças estatisticamente significativas entre os grupos de pacientes redundantes e não redundantes em relação às variáveis sócio-demográficas estudadas. As condições que contribuíram com maior número de dias de redundância foram neoplasias, doenças do aparelho respiratório (pneumopatia complicada e doença pulmonar obstrutiva crônica, fraturas, hipertensão arterial com ou sem insuficiência cardíaca, acidente vascular cerebral e cirrose hepática. Face a magnitude do desperdício de recursos decorrentes da hospitalização desnecessária e riscos para o paciente da permanência prolongada no hospital, é recomendada a implantação de programas experimentais para tratamento domiciliar de pacientes crônicos.A study on redundant days of hospitalization based on the concept of nursing care dependence showed that among the 99 patients studied 68 demonstrated redundant days during their hospitalization of 25 or more days. This implies a wastage of 1094 bed-days. In another study a group of 102 patients and redundancy was identified in 60 patients. There was no significant statistical difference between the redundant and non-redundant patients according to the social and demographic variables studies. Five diseases were found to be more frequent among the redundant patients: respiratory diseases, fractures, arterial hypertension with or without cardiac failure, cerebral strokes and hepatic cirrhosis

  6. Práticas da psicologia clínica em face do sofrimento psíquico causado pelo desemprego contemporâneo Prácticas de psicologia clinica frente al sufrimiento psíquico causado por el desempleo contemporáneo Psychology clinical practices towards psychological suffering caused by contemporary unemployment

    Directory of Open Access Journals (Sweden)

    Daniel Abs

    2010-06-01

    Full Text Available Este estudo objetivou compreender as práticas da Psicologia Clínica em face do sofrimento psíquico causado pelo desemprego contemporâneo. Para tanto, foram entrevistados 8 psicólogos da região metropolitana de Porto Alegre, abordando os seus entendimentos sobre as temáticas de trabalho e desemprego, as suas consequências para a subjetividade dos pacientes, as intervenções utilizadas, o auxílio da abordagem teórica nessas intervenções e as possíveis contribuições da Psicologia em relação ao fenômeno estudado. Foi realizada análise de conteúdo para os dados coletados. Os enunciados foram agrupados em quatro temáticas, com as respectivas categorias: Trabalho, Desemprego, Intervenções sobre o desemprego na clínica e Lugar da Psicologia em face do desemprego. Os enunciados destacaram a falta de operadores clínicos para se lidar com esse fenômeno. Concluiu-se que o desemprego é uma temática da clínica psicológica contemporânea, e que esta necessita produzir operadores capazes de, na clínica, dar conta de fenômenos contemporâneos que estão emergindo, como o desemprego. Concluiu-se igualmente que são necessários mais estudos abordando essa temática.Este estudio tuvo el objetivo de comprender las prácticas de Psicología Clínica frente al sufrimiento psíquico causado por el desempleo contemporáneo. Para tal, fueron entrevistados 8 psicólogos de La región metropolitana de Porto Alegre, abordando sus entendimientos de las temáticas de trabajo y desempleo, consecuencias estas para la subjetividad de los pacientes, intervenciones utilizadas, auxilio del abordaje teórico en estas y posibles contribuciones de la Psicología frente al fenómeno estudiado. Fueron realizados análisis del contenido para los datos colectados. Los enunciados fueron agrupados en cuatro temáticas, con sus respectivas categorias: Trabajo, Desempleo, Intervenciones sobre el desempleo en la clínica y lugar de la Psicología frente al

  7. La diagnostica molecolare nel laboratorio di patologia clinica veterinaria

    OpenAIRE

    Zambon, Elisa

    2015-01-01

    La prima parte del nostro studio riguarda la tecnica LAMP (Loop-mediated isothermal amplification), una tecnica di amplificazione isotermica recentemente inventata (Notomi et al., 2000). Essa presenta notevoli vantaggi rispetto alle tradizionali PCR: non necessita di strumentazioni sofisticate come i termociclatori, può essere eseguita da personale non specializzato, è una tecnica altamente sensibile e specifica ed è molto tollerante agli inibitori. Tutte queste caratteristiche fanno sì c...

  8. An assessment of ninth round; Nona: uma avaliacao da rodada

    Energy Technology Data Exchange (ETDEWEB)

    Assumpcao, Eduardo; Andrade, Leila; Fontana, Raphaela [Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Accomplished on November, 27{sup th}, 2007, 271 exploratory blocks were offered in Round 9, distributed within 14 sectors, totalling an area of 73 thousand km{sup 2}. The following basins were included: Campos, Espirito Santo, Para- Maranhao, Parnaiba, Pernambuco-Paraiba, Potiguar, Santos, Reconcavo and Rio do Peixe. From the original lot of 67 companies qualified (31 Brazilian and 36 of foreign origin), 42 offered bids individually or in partnerships. 117 blocks were allocated to 24 winning operator companies. Other 12 enterprises won acreage as non-operator participants of joint bids. A record of R$ 2,1 billion were offered as signature bonuses along with 169.436 units of the so called minimum exploratory programs. These units may be converted to an estimated R$ 1,4 billion. The objective of this paper is to evaluate the results obtained in Round 9, analyzing collected data through three different perspectives of aggregate results: bidding companies, offered areas and exploratory models. (author)

  9. Clinical evolution of patients hospitalized due to the first episode of Acute Coronary Syndrome Evolución clínica de pacientes internados debido el primer episodio de la Síndrome Aguda de las Coronarias Evolução clinica de pacientes internados em decorrência do primeiro episódio da Síndrome Coronariana Aguda

    Directory of Open Access Journals (Sweden)

    Gislaine Pinn Gil

    2012-10-01

    realización de revascularización del miocardio fue diferente en los dos grupos.OBJETIVO: avaliar a evolução clínica de pacientes internados pelo primeiro episódio da síndrome coronariana aguda (SCA, segundo sua manifestação clínica. MÉTODOS: foram coletados dados de 234 pacientes internados entre maio de 2006 e julho de 2009, em decorrência do primeiro episódio de uma SCA, mediante consultas aos prontuários. RESULTADOS: a maioria (59,8% foi internada devido ao infarto agudo do miocárdio (IAM. No grupo com IAM, 19,3% apresentaram complicações e 12,8% no grupo com angina instável (AI (p=0,19. A realização de angioplastia foi maior entre os pacientes com IAM do que com AI (p=0,02 e a cirurgia de revascularização foi mais realizada entre os pacientes com AI (p=0,03. A maioria (227 - 97% sobreviveu ao evento coronariano. Entre os sete pacientes que morreram na internação, quatro tinham IAM (2,9% e três AI (3,2%. CONCLUSÕES: houve maior número de complicações entre os infartados e a realização de revascularização do miocárdio foi diferente nos dois grupos.

  10. da etiologia ao tratamento

    OpenAIRE

    Soares, Tânia Alexandra Maia

    2013-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária A luxação da articulação temporomandibular (ATM) ocorre quando o côndilo mandibular se desloca para fora da fossa mandibular e não é capaz de retornar. As manifestações clinicas mais frequentes desta patologia são: dificuldade de fechar a boca, depressão pré-auricular, sialorréia, tensão dos músculos da mastigação e dor severa na reg...

  11. Evaluation of the impact of farming activity in the water quality in surface catchment areas in hydrographic basin from Mogi-Guacu and Pardo Rivers, Sao Paulo; Avaliacao do impacto da atividade agropecuaria na qualidade da agua em areas de captacao superficial nas bacias hidrograficas dos Rios Mogi-Guacu e Pardo, Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Katsuoka, Lidia

    2001-07-01

    This study was performed in 10 small basins located in the Mogi-Guacu and Pardo Rivers, in the Northeastern area of Sao Paulo State. The land belonging of these basins is used to grow row crops of potato, coffee and pasture areas. This study aimed to characterize small basins, to evaluate water and sediment quality and to correlate basic aspects of climatology, hydrology, toxicology and land uses to the physical, chemical and toxicological characteristics of the water in the streams. Geographic Information System (GIS) was used as a tool of evaluation of land uses and risk assessment was performed for a final evaluation. The samplings were carried out from June/1999 to June/2000 in the 13 collecting points. It was verified that water quality is dependent upon the rainy and dry periods and the harvest periods. In the beginning of rainy periods were found large concentrations of metals and traces of herbicides leachate from soil and, in the dry period the same event was verified, caused by concentration of the water. In August, September and October phosphorus concentrations were very low getting an improvement in the water quality. Al, Fe and Mn are majority elements of chemical compositions of rocks of the study area, and exceed the Brazilian Guidelines. The stream waters were classified as 44% oligotrophic, 42% mesotrophic and 14% eutrophic. Jaguari-Mirim River presented the largest values of Trophic Index (TI). Sediment analyses showed a great variety of organic compounds coming from anthropogenic activities (industrial and farming activity). Toxicity tests with hyalella azteca in the sediments presented toxicity for sediments from Sao Joao da Boa Vista and Divinolandia. A methodology was developed for organochlorinated pesticides by gas chromatography coupled to mass spectrometry (GCMS). The presence of organochlorinated pesticides was not verified. (author)

  12. Trabalho e subjetividade no contexto hospitalar: análise institucional do discurso produzido em grupo com profissionais de enfermagem da pediatria

    OpenAIRE

    2013-01-01

    A presente pesquisa tem como objetivo realizar uma analise institucional do discurso produzido em grupo por profissionais da equipe de enfermagem da Clinica Pediatrica de um hospital escola da rede publica de saude da cidade de Sao Paulo. Nossa analise foca a relacao que este profissional estabelece com o trabalho a partir do referencial metodologico conceitual da Analise Institucional do Discurso desenvolvido por Guirado (2010). Como produto desse estudo demonstramos que a relacao construida...

  13. Evaluation of radiolabeling of annexin A5 with technetium-99m: influence of the labeling methods on physico-chemical and biological properties of the compounds; Avaliacao da radiomarcacao da anexina A5 com tecnecio-99m: influencia do metodo de marcacao nas propriedades fisico-quimicas e biologicas do composto

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Josefina da Silva

    2009-07-01

    Annexin A5 (ANXA5) is an intracellular human protein of 36 kDa with high affinity for membrane-bound phosphatidylserine that is selectively exposed on the surface of cells undergoing apoptosis. Apoptosis is important in normal physiology and innumerous pathologic states. Clinical applications for ANXA5 imaging are being developed in oncology, organ transplantation and cardiovascular diseases. Many strategies to radiolabel the protein have been described, including direct labeling, derivatization through a bifunctional chelating agent (BFC), production of mutated protein or peptide analogs. Several {sup 99}mTc-labeling techniques have been reported using different cores, including [Tc=O]{sup +3}, [Tc]HYNIC, [Tc{identical_to}N]+2 and [Tc(CO{sub 3})]{sup +1}. In this study, we evaluated the influence of {sup 99}mTc cores on biological behavior and physico-chemical properties of radiolabeled annexin. Radiolabeling procedure using [Tc{identical_to}N]{sup +2} core was a two-step procedure including the reaction of {sup 99}mTcO4 - with SDH in the presence of SnCl{sub 2} and PDTA to obtain the intermediate {sup 99}mTcN-SDH, and successive addition of ANXA5. The results obtained were not satisfactory, despite the high efficiency in the production of the intermediate. The [Tc=O]{sup +3} core was produced using the ethylene dicysteine (EC) as BFC. TSTU was employed in the derivatization to produce the corresponding hydroxysuccinimide ester. Different ANXA5:EC ratios were studied and all labeling conditions resulted in high radiochemical yield but with differences in lipophilicity, stability, biological distribution and affinity for apoptotic cells. The HYNIC-ANXA5 also produced the labeled protein with high radiochemical yield. The stability of the radiolabeled ANXA5 was evaluated after storing at room temperature, at 2 - 8 degree C and in human serum at 37 degree C. The analysis of these results showed that the {sup 99}mTc-EC-ANXA5 (ratio 10-2) was the most stable compound

  14. Avaliacao neuropsicologica de idosos praticantes de capoeira

    Directory of Open Access Journals (Sweden)

    Diogo Miranda Petry

    2014-01-01

    Full Text Available INTRODUÇÃO: Este estudo procura contribuir com uma relação pouco explorada no meio acadêmico: capoeira, cognição e envelhecimento. Relacionando estudos sobre funções executivas e a capoeira, busca-se investigar a interligação desta arte e as funções executivas. Estas se referem a desempenhos de comportamentos complexos (memória de trabalho, flexibilidade mental, tomada de decisão e a memória léxico-semântica. OBJETIVO: Comparar o desempenho de funções executivas em idosas praticantes de capoeira e idosas não praticantes de exercício físico. MÉTODO: Estudo transversal que coletou as informações de cada participante apenas uma vez. Serão comparados dois grupos: 1 grupo de idosos praticantes de capoeira e 2 idosos que não fazem exercício físico. Para seleção e caracterização dos grupos utilizaram-se: questionário sociodemográfico, aspectos gerais de saúde e escala de hábitos de leitura e escrita, mini-exame de estado mental (MEEM e escala de depressão de Yesavage (GDS-30. Para avaliar o desempenho das funções executivas foi realizado o teste de trilhas e as tarefas de fluência verbal. Para análise estatística dos dados será utilizado o teste de Shapiro-Wilk para normatização dos dados. O teste de t de Student e o teste U de Mann Whitney serão usados para comparar duas médias de amostras independentes. Utilizou-se a improvisação, a ação, a tomada de decisão, o equilíbrio e as noções de espaço, tempo, ritmo, música, e a compreensão do jogo da capoeira como intervenção devido à possível utilização dos processos executivos nessa arte. RESULTADOS: Verificou-se que não houve diferença significativa nos testes realizados. Porém houve superioridade nos testes de fluência verbal e testes de trilha A e B, sendo maior em B no grupo de capoeira do que no grupo controle. CONCLUSÃO: A prática de capoeira tem uma tendência em contribuir para a melhora das funções executivas, embora os

  15. Neurosurgical experience with tumours of the pineal region at Clinica Puerta de Hierro.

    Science.gov (United States)

    Vaquero, J; Ramiro, J; Martínez, R; Bravo, G

    1992-01-01

    The clinicopathological experience with 50 cases of pineal region tumours at Clinica Puerta de Hierro is presented. In this series, 88% of the patients were evaluated by CT-scan. Pineal region tumours make up approximately 0.7% of the intracranial expansive processes in the Spanish population. The largest group of lesions appearing in this localization is that of the germinomas (38%), followed by nontumoural lesions (20%) and tumours generally considered to be of the vicinity, such as meningiomas, gliomas and metastases (18%), tumours of the pineal parenchyma (14%), and non-germinoma germinal tumours (10%). In our series, in addition to an intracranial hypertension syndrome, an ophthalmological and, to a minor degree, an endocrinological syndrome predominate in germ-cell tumours, with a cerebellar syndrome appearing in gliomas of the pineal region. All the patients in the series diagnosed as having a germinoma and treated by irradiation are alive, and free of disease, after follow-up ranging from 2 to 20 years (mean: 8 years). The experience obtained with the present series supports the opinion that, in radiosensitive tumours, surgical resection adds no therapeutic benefit to treatment with radiotherapy alone. We suggest that when dealing with a tumour of the pineal region, CT-scan and clinical assessment now permit an initial selection of patients susceptible to surgery as a first therapeutic option, indicating those patients who, because they are considered to have either a "probable germinoma" or a "tumour of uncertain diagnosis", should undergo stereotaxic biopsy or trial radiotherapy and, only when this has proved a failure, should be subjected to open surgery.

  16. Psicoterapia breve gestaltica para homens com HIV/AIDS em contexto de clinica ampliada

    OpenAIRE

    LOBO, Warlington Luz

    2013-01-01

    O presente trabalho visou investigar qual a importância da Psicoterapia em homens doentes de aids marcados pela proximidade com a morte ou a finitude existencial internados em uma enfermaria hospitalar. A intervenção psicológica, na área da saúde e da clínica psicológica, foi procedimento interventivo que permitiu efetivar a escuta socialmente engajada visando superar a premissa acerca da doença enquanto centro do tratamento, transmitida ao longo da história e veiculando a concepção de um suj...

  17. Clinical, radiographic and scintigraphic aspects of the trapeziometacarpal osteoarthritis; Caracterizacao clinica, radiografica e cintilografica da osteoartrose trapeziometacarpiana

    Energy Technology Data Exchange (ETDEWEB)

    Kaziyama, Helena Hideko Seguchi

    1996-12-31

    Trapeziometacarpal osteoarthritis occurs mainly in women during the menopausal period. It is related to manual activities and is usually bilateral. The onset is insidious and the evolution is slow and progressive. It is characterized by of strength and pain in the basis of the thumb resulting in limitation of the use and function of the hand. The diagnosis of this condition is based on the physical examination. The manouver of compression axial-rotation of the trapezimetacarpal joint is a common positive finding. Typical findings of osteoarthritis are present in the radiological studies. Scintigraphic images have a predictive value. The early diagnosis is important to avoid the risk factors and to prevent disabilities of the hand. (author) 102 refs., 18 figs., 10 tabs.

  18. Actinomicose cerebral: observação anatomo-clinica e revisão da literatura brasileira

    Directory of Open Access Journals (Sweden)

    Luciano de Souza Queiroz

    1975-12-01

    Full Text Available Os autores relatam a observação anátomo-clínica de um paciente de 33 anos, com síndrome de hipertensão intracraniana e hemiparesia à direita. O líquido cefalorraqueano revelava discreta hipercitose linfomonocitária. A autópsia mostrou três abscessos cerebrais, com edema difuso mais intenso no hemisfério cerebral esquerdo, sem leptomeningite purulenta. O exame histopatológico demonstrou grãos actinomicóticos nos abscessos cerebrais e pulmonares. A literatura brasileira sobre neuroactinomicose é analisada, com encontro de seis casos, publicados entre 1934 e 1946. São discutidos aspectos clínicos e anátomo-patológicos relevantes dos casos nacionais.

  19. Energy, social aspects and natural resources in agrarian reform projects: evaluation of life conditions; Energia, sociedade e recursos naturais em projeto de reforma agraria: avaliacao das condicoes de vida, possibilidades e dificuldades no assentamento Ipora (Rio Preto da Eva e Itacoatiara - AM)

    Energy Technology Data Exchange (ETDEWEB)

    Franca, Breno de Souza [Amazonas Univ., Manaus, AM (Brazil). Nucleo de Eficiencia Energetica (NEFEN)]. E-mail: nefen_ua@objetivomao.br

    2000-07-01

    This paper presents an account of the activities and information collected in the research project 'Alternative technologies to the rural area: technological, economic and social aspects', developed in the Ipora Placement Project (Rio Preto da Eva and Itacoatiara - Amazonas State, Brazil). The actions developed in this project were based on the research-action method and are focused in the energetic matters, however the social, economic and environmental aspects of each energetic alternative discussed were always considered and proved to be decisive in the decision-taking process of the project activities. This paper introduces a discussion of the referred Placement in that context and also tries to foster new studies, evaluations and conclusions about it. (author)

  20. Decision theory on the quality evaluation of medical images; A teoria da decisao na avaliacao da qualidade da imagem medica

    Energy Technology Data Exchange (ETDEWEB)

    Lessa, Patricia Silva

    2001-10-01

    The problem of quality has been a constant issue in every organization.One is always seeking to produce more, to do it at a lower cost, and to do it with better quality. However, in this country, there is no radiographic film quality control system for radiographic services. The tittle that actually gets done is essentially ad hoc and superficial. The implications of this gap, along with some other shortcomings that exist in process as a whole (the state of the x-ray equipment, the adequate to use in order to obtain a radiography, the quality of the film, the processing of the film, the brightness and homogeneity of the viewing boxes, the ability of the radiologist), have a very negative impact on the quality of the medical image, and, as result, to the quality of the medical diagnosis and therapy. It frequently happens that many radiographs have to be repeated, which leads to an increase of the patient's exposure to radiation, as well as of the cost of the procedure for the patient. Low quality radiographs that are not repeated greatly increase the probability of a wrong diagnosis, and consequently, of inadequate therapeutical procedures, thus producing increased incidence of bad outcomes and higher costs. The paradigm proposed in order to establish a system for the measurement of the image's quality is Decision Theory. The problem of the assessment of the image is studied by proposing a Decision Theory approach. The review of the literature reveals a great concern with the quality of the image, along with an absence of an adequate paradigm and several essentially empirical procedures. Image parameters are developed in order to formalize the problem in terms of Decision Theory, and various aspects of image digitalisation are exposed. Finally, a solution is presented, including a protocol for quality control. (author)

  1. Activity evaluation from different native or irradiated with {sup 60} Co gamma rays snake venoms and their inhibitory effect on Leishmania (Leishmania) amazonensis; Avaliacao da atividade de diferentes venenos de serpentes, nativos ou irradiados, com radiacao gama de {sup 60} Co, quanto ao poder inibitorio do crescimento de Leishmania (Leishmania) amazonensis

    Energy Technology Data Exchange (ETDEWEB)

    Lourenco, Cecilia de Oliveira

    2000-07-01

    Cutaneous leishmaniasis is a disease, caused by Leishmania parasites, that occurs frequently in tropical and sub-tropical regions of the world. Skin lesions that could results in disfiguring aspect characterize it. The treatment is based on few drugs as antimony salts or pentamidine that are toxic with increasing resistance by the parasite. Alternative forms of disease treatment are in constant search, including natural components as snake venoms. Previous studies demonstrate that some components of snake venoms have an inhibitory effect against those parasites, including Leishmania species. Although snake venoms presented high toxicity, several methods have been described to detoxify most or some of their toxic components, with favorable results by the use of gamma irradiation. In this report we tested several native and irradiated snake venoms for inhibitory effect against Leishmania (Leishmania) amazonensis parasite and LLCMK{sub 2} mammalian cells, with enzymatic tests and electrophoresis. There are significant activity in Acanthophis antarcticus, Agkistrodon bilineatus, Bothrops moojeni, Bothrops jararaca, Hoplocephalus stephensi, Naja melanoleuca, Naja mossambica, Pseudechis australis, Pseudechis colletti, Pseudechis guttatus and Pseudechis porphyriacus, venom being inactive Pseudonaja textilis, Notechis ater niger, Notechis scutatus. Oxyuranus microlepidotus and Oxyuranus scutellatus venoms. After 2 KGy of {sup 60}Co irradiation most venom loses significantly their activity. Venoms with antileishmanial activity presented L-amino acid oxidase (L-AO) activity and showed common protein with a molecular weight about 60kDa in SDS-PAGE. These results indicate that L-AO activity in those venoms are probably related with antileishmanial effect. (author)

  2. Gingival healing after gingivectomy procedure and low intensity laser irradiation. A clinical and biometrical study in anima nobile; Reparacao gengival apos a tecnica de gengivectomia e aplicacao de laser em baixa intensidade. Avaliacao clinica e biometrica em humanos

    Energy Technology Data Exchange (ETDEWEB)

    Amorim, Jose Claudio Faria

    2001-07-01

    For the present study seven patients presenting periodontal disease were selected in a way that they required the performance of gingivectomy procedure in the region of premolars in both sides, being this in the upper or lower region. After the surgical procedure one side was submitted to low intensity laser radiation, wavelength 685 nm, power 50 mW and fluency of 4J/cm{sup 2}, contact mode. The other side was used as a control, not receiving any laser irradiation. Healing process for both sides, was clinically and biometrically evaluated and compared using photographs for the periods: pre-operative, immediate post-operative, 3, 7,14,21, 28 and 35 days. The analysis was performed by 3 specialists in Periodontology considering aspects of healing. Results were submitted to statistical analysis. Biometrical evaluation showed improvement of healing for the period of 21 and 28 days in the lased group. Clinical evaluation showed better reparation mainly after the third day for the active group. Laser group was considered to present an improved healing when compared to the control group. (author)

  3. Policitemia vera - caracterização clinica e molecular e novas abordagens terapêuticas

    OpenAIRE

    Amaral, Cecília Beatriz Alves

    2009-01-01

    Dissertação de mestrado integrado em Medicina (Hematologia), apresentado á Faculdade de Medicina da Universidade de Coimbra. A Policitemia Vera (PV) é uma doença clonal de etiologia desconhecida, na maior parte dos casos, que envolve a célula estaminal progenitora hematopoiética multipotencial. É uma neoplasia mieloproliferativa crónica (NMP) que se caracteriza pela expansão das três linhas celulares hematopoiéticas: eritróide, granulocítica e megacariocítica, com predomínio da primeira, d...

  4. A clinica como pratica arborifica e rizomorfica do trabalho em enfermagem cirurgica

    Directory of Open Access Journals (Sweden)

    Lenice Dutra de Sousa

    2013-12-01

    Full Text Available Foi realizada uma pesquisa qualitativa e exploratória, na forma de um estudo de caso, em uma unidade de internação cirúrgica de um hospital universitário, que objetivou analisar o trabalho do enfermeiro sob a ótica da produção de cuidados em saúde e do exercício da clínica. Os sujeitos do estudo foram seis enfermeiros e foram realizadas observações não participantes, pesquisa documental e entrevistas em profundidade com posterior análise textual discursiva. Verificou-se que o trabalho da enfermagem é organizado segundo duas perspectivas interconectadas e interdependentes: a do modelo clínico, que compõe a estrutura-mestre de sua prática, e uma estrutura composta por elementos múltiplos e heterogêneos. O modelo clínico de assistência organiza-se como uma estrutura centrada que possibilita a resolutividade das necessidades biológicas e atua como base para a conexão de outros saberes e práticas que expandem o fazer do enfermeiro por meio de interligações com o ambiente.

  5. Radionuclide evaluation in malignant external otitis; Avaliacao com radionuclideos da otite externa maligna

    Energy Technology Data Exchange (ETDEWEB)

    Wolosker, Sara; Penha Costa Marques, Marise da [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina; Fonseca, Lea Miriam Barbosa da [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina]|[Hospital Universitario Clementino Fraga Filho, Rio de Janeiro, RJ (Brazil). Servico de Medicina Nuclear

    1996-03-01

    Malignant external otitis (MEO) is a severe infection of the external auditory canal that can result in osteomyelitis of the skull base. Twenty-eight patients with MEO (19 diabetics, 8 with AIDS and 1 with acute mielogenous leukemia) were evaluated using {sup 99m} Tc-MDP bone scintigraphy. {sup 67} Ga citrate and computed tomography (CT) at the time of diagnosis for establishing the MEO extent. {sup 67} Ga scans were obtained periodically in order to assess the evolution of the treatment. {sup 99m} Tc scans had shown high sensitivity and specificity in assessing the bone disease. Serial {sup 67} Ga scans had shown to be valuable indicators of infection remission. CT scans provided poor diagnosis of early bone involvement. (author). 26 refs., 4 figs.

  6. Quality evaluation of blood irradiation process;Avaliacao da qualidade do processo de irradiacao de hemocomponentes

    Energy Technology Data Exchange (ETDEWEB)

    Goto, R.E.; Medeiros, R.B. [Universidade Federal de Sao Paulo (DDI/UNIFESP), SP (Brazil). Dept. de Diagnostico por Imagem. Coordenadoria de Fisica e Higiene das Radiacoes

    2009-07-01

    An adverse reaction in blood transfusion is the graft versus host disease (GVHD). This disease affects immunodeficient or immunosuppressed patients where transfused T cells proliferate and initiate a host's immune system reaction. Blood gamma irradiation is the most efficient way to inhibit lymphocyte T blastic transformation and mitotic activity and it is the most effective method to combat this disorder. However, there is no fast and effective system to analyze the dose distribution in the irradiation process and guarantee that the absorbed doses are in agreement with FDA recommendations. This study aims to establish a periodic quality control of the gammacell irradiators using radiochromic films properly calibrated. The quality control is simply and effective to combat GVHD as well as is useful to detect mechanical fails at rotation set system through the dose uniformity analysis. It was possible to verify the uniformity ranged from -72.38% to 106.33% and some blood bag received doses not compatible with recommended international threshold. (author)

  7. Integrity assessment of pipelines - additional remarks; Avaliacao da integridade de dutos - observacoes adicionais

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Luis F.C. [PETROBRAS S.A., Salvador, BA (Brazil). Unidade de Negocios. Exploracao e Producao

    2005-07-01

    Integrity assessment of pipelines is part of a process that aims to enhance the operating safety of pipelines. During this task, questions related to the interpretation of inspection reports and the way of regarding the impact of several parameters on the pipeline integrity normally come up. In order to satisfactorily answer such questions, the integrity assessment team must be able to suitably approach different subjects such as corrosion control and monitoring, assessment of metal loss and geometric anomalies, and third party activities. This paper presents additional remarks on some of these questions based on the integrity assessment of almost fifty pipelines that has been done at PETROBRAS/E and P Bahia over the past eight years. (author)

  8. Magnetomotive colon elastography: preliminary assessment; Elastografia magnetomotriz da regiao do colon: avaliacao preliminar em phantoms

    Energy Technology Data Exchange (ETDEWEB)

    Bruno, A. Colello, E-mail: alexandrecolellobruno@usp.br [Universidade de Sao Paulo (USP), Ribeirao Preto, SP (Brazil). Faculdade de Medicina; Grillo, F.W.; Sampaio, D.R.T.; Carneiro, A.A.O. [Universidade de Sao Paulo (USP), Ribeirao Preto, SP (Brazil). Faculdade de Filosofia Ciencias e Letras

    2015-08-15

    Colorectal cancer (CRC) is the third most common malignant neoplasm worldwide and early diagnosis reduces morbidity. The standard preventive exams methods are uncomfortable for the patient, invasive, and /or are ionizing. Here, we evaluate the potential of magneto-motive ultrasound (MMUS) as a new, minimally invasive CRC screening technique. We developed a hybrid transducer (comprised of an ultrasound probe and a magnetic coil system) to construct relative elastography maps in a paraffin phantom with isoechoic inclusions. The electromagnetic component of our system manipulated ferromagnetic fluid located inside of our synthetic colon, and the captured ultrasound images were used to produce relative elastography maps. The MMUS images reveal by otherwise invisible structures based on differences in stiffness. Ultrasound elastography (relative) images by MMUs technique complements usual preventive CRC exams, is minimally invasive, has relative low cost when compared with others image methods. Also is fast diagnose and more comfortable for patient which prevents withdrawal of the screening. (author)

  9. Imaging assessment of osteitis pubis; Avaliacao por imagem da osteite pubica

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Alexia Abuhid; Ferreira, Ana Paula Alves; Leite, Ana Rachel Albuquerque de Moura; Guido, Daniela Araujo; Rodrigues, Rogeria Nobre [Axial Centro de Imagem, Belo Horizonte, MG (Brazil)]. E-mail: ce@cidbh.com.br; Araujo, Rodrigo Otavio Dias [Minas Tenis Clube, Belo Horizonte, MG (Brazil); Lasmar, Rodrigo Campos Pace [Faculdade de Ciencias Medicas de Minas Gerais, Belo Horizonte, MG (Brazil). Curso de Fisioterapia

    2005-10-15

    Objective: to assess the physiopathological aspects of osteitis pubis and the findings seen on imaging methods, emphasizing the usefulness of Flamingo view radiographs and the diagnostic aspects of Magnetic resonance images. Material and Method: magnetic resonance images of ten patients (eight of them professional athletes) referring symptoms in the inguinal regional were retrospectively evaluated. For some of these patients Flaming view radiographs were performed. Results: in all studied patients magnetic resonance imaging was the only diagnostic method capable of showing the different phases os osteitis pubis, from acute cases with pubic bone marrow edematous changes to chronic cases with involvement of other pelvic joints. Flamingo view radiographs were performed in six patients and three of them were diagnosed with vertical pubis symphyseal instability greater than 2 mm of vertical displacement. This diagnosis was confirmed by instability tests using orthopedic manoeuvres. Conclusion: magnetic resonance imaging was the most helpful method for the diagnosis of different phases of osteitis pubis whereas conventional X-ray was inconclusive in the initial phases. Flamingo view radiographs were extremely important to show vertical instability of the pubic symphysis, which in combination with osteitis pubis can be the cause of failure of nonoperative treatment. (author)

  10. Evaluation of occupational exposure in intraoral radiography; Avaliacao da dose ocupacional em radiografia intraoral

    Energy Technology Data Exchange (ETDEWEB)

    Miguel, Cristiano; Barros, Frieda S.; Rocha, Anna S.P.S.; Godoi, Walmor C., E-mail: miguel_cristianoch@yahoo.com.br, E-mail: saicla@utfpr.edu.br, E-mail: annarocha@yahoo.com, E-mail: walmor.godoi@gmail.com [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Tilly Junior, Joao G., E-mail: joao.tilly@derax.com.br [Universidade Federal do Parana (HC/UFPR), Curitiba, PR (Brazil). Hospital das Clinicas

    2014-07-01

    The intraoral radiography is widely performed in the dental office due to low cost and agility. The doses in intraoral radiology are considered low, however it is known that doses below the threshold for deterministic radiation has the potential to induce stochastic effects. An intraoral radiography has a risk of inducing fatal cancer or serious in order of 1:10,000,000. Besides the patient, the dentist may also be being exposed to radiation during the work with the radiographics practices. The bibliographies demonstrates the lack of information on radiation protection of dentists, however, the occupational dose reduction was observed in radiology over the past 14 years. This work aims to evaluate the effective dose of radiation to which workers can be exposed dentists in dental offices to perform intraoral radiographs. In this context, a study was be conducted between June 2013 and May 2014 with 44 professionals in Curitiba city. For each dentist was given a personal dosimeter to be used for 30 days. During this period, the number of radiographies and the length of the cable triggers of the X-ray equipment was registered and, the dosimeter´s dose was read. It was observed that the cables triggers meet regulatory standards and allow dentists to get the mean minimum distance of two meters from the radiation source in 93% of cases. Through analysis of the doses, it was concluded that occupational exposures of these workers are within the recommended threshold by regulatory 453/1998 of the Ministry of Health from Brazil. (author)

  11. Miastenia grave: avaliação clinica e terapêutica de 55 casos

    Directory of Open Access Journals (Sweden)

    Lineu Cesar Werneck

    1987-12-01

    Full Text Available Foram estudados 55 casos de miastenia grave, avaliando os sinais e sintomas clínicos que ocorreram no início e na evolução dos pacientes, bem como os procedimentos diagnósticos e avaliação das medidas terapêuticas utilizadas. No manejo dos pacientes foram utilizados anticolinesterásicos, corticoesteróides, azathioprina, plasmaferese e timectomia, sem que fosse possível encontrar relação estatística significante entre os diferentes procedimentos com respeito à resolução da doença. Dos 55 casos, 9 (16,6% obtiveram remissão total, 41 (74,5% permaneceram com a doença ativa necessitando de tratamento sintomático e 5 (9.09% faleceram. Houve relação estatística significante entre os sinais de insuficiência respiratória, crises miastênicas e timoma somente no grupo de pacientes que faleceram (um por insuficiência respiratória restritiva secundária a cifoescoliose severa, três com timoma e um caso durante a timectomia.

  12. Evaluation of skin dose in tomographic radiographs of temporomandibular joint; Avaliacao da dose pele em radiografias tomograficas da articulacao tempromandibular

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, S.B.; Chaves, F.C.; Rocha, F.E.F.C. [Pernambuco Univ., Recife, PE (Brazil). Dept. de Clinica e Odontologia Preventiva; Khoury, H.J. [Pernambuco Univ., Recife, PE (Brazil). Dept. de Energia Nuclear]. E-mail: khoury@elogica.com.br

    2001-07-01

    The aim of this study was to evaluate the skin entrance dose, in patients with temporomandibular joint (TMJ) dysfunctions submitted to computerized tomography. For this purpose, in a private medical establishment, in the city of Recife-Pe/Br, 40 patients were evaluated, in according to radiation doses received in eyes, thyroid and TMJ regions. The value found for eye region range from 0.004 to 0.125 mGy, for thyroid range from 0.002 to 0.113 mGy and for TMJ range from 0.112 to 0.541 mGy.

  13. Synthesis and evaluation of antimalarial activity of curcumin derivatives; Sintese e avaliacao da atividade antimalarica de compostos derivados da curcumina

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Patricia Ramos; Miguel, Fabio Balbino; Almeida, Mauro Vieira de; Couri, Mara Rubia Costa [Universidade Federal de Juiz de Fora (UFSJ), MG (Brazil). Instituto de Ciencias Exatas. Departamento de Quimica; Oliveira, Michael Eder de; Ferreira, Vanessa Viana; Guimaraes, Daniel Silqueira Martins; Lima, Aline Brito de; Barbosa, Camila de Souza; Oliveira, Mariana Amorim de; Almeida, Mauro Vieira de; Viana, Gustavo Henrique Ribeiro; Varotti, Fernando de Pilla, E-mail: varotti@ufsj.edu.br [Universidade Federal de Sao Joao Del Rei (UFSJ), MG (Brazil). Centro de Ciencias da Saude; and others

    2014-05-15

    ne of the main challenges in the development of new antimalarial drugs is to achieve a viable lead candidate with good pharmacokinetic properties. Curcumin has a broad range of biological activities, including antimalarial activity. Herein, we report the antimalarial activity of six curcumin derivatives (6-12) and an initial analysis of their pharmacokinetic properties. Five compounds have demonstrated potent activity against the P. falciparum in vitro (IC{sub 50} values ranging from 1.7 to 15.2 μg mL{sup -1}), with moderate or low cytotoxicity against the HeLa cell line. The substitution of the carbonyl group in 6 by a 2,4-dinitrophenylhydrazone group (to afford 11) increases the Selective Index. These preliminary results indicate curcumin derivatives as potential antimalarial compounds. (author)

  14. Virtual-reality-based attention assessment of ADHD: ClinicaVR: Classroom-CPT versus a traditional continuous performance test.

    Science.gov (United States)

    Neguț, Alexandra; Jurma, Anda Maria; David, Daniel

    2016-06-03

    Virtual-reality-based assessment may be a good alternative to classical or computerized neuropsychological assessment due to increased ecological validity. ClinicaVR: Classroom-CPT (VC) is a neuropsychological test embedded in virtual reality that is designed to assess attention deficits in children with attention deficit hyperactivity disorder (ADHD) or other conditions associated with impaired attention. The present study aimed to (1) investigate the diagnostic validity of VC in comparison to a traditional continuous performance test (CPT), (2) explore the task difficulty of VC, (3) address the effect of distractors on the performance of ADHD participants and typically-developing (TD) controls, and (4) compare the two measures on cognitive absorption. A total of 33 children diagnosed with ADHD and 42 TD children, aged between 7 and 13 years, participated in the study and were tested with a traditional CPT or with VC, along with several cognitive measures and an adapted version of the Cognitive Absorption Scale. A mixed multivariate analysis of covariance (MANCOVA) revealed that the children with ADHD performed worse on correct responses had more commissions and omissions errors than the TD children, as well as slower target reaction times . The results showed significant differences between performance in the virtual environment and the traditional computerized one, with longer reaction times in virtual reality. The data analysis highlighted the negative influence of auditory distractors on attention performance in the case of the children with ADHD, but not for the TD children. Finally, the two measures did not differ on the cognitive absorption perceived by the children.

  15. Definizione di un modello di prioritá clinica per la gestione dei tempi e delle liste di attesa

    Directory of Open Access Journals (Sweden)

    L. Bruno

    2003-05-01

    Full Text Available La gestione dei tempi di attesa, per la complessità dei determinanti che vi concorrono, costituisce una delle criticità del SSN frequentemente affrontata come un’emergenza. Per individuare soluzioni appropriate, garantendo tempi di attesa non tanto brevi quanto certi e adeguati al bisogni clinici, la Regione Lazio recependo gli indirizzi nazionali ha dato mandato ai Direttori Generali di definire e realizzare un’azione di governo clinico, che adegui l’offerta al bisogno reale. A tal fine la ASL Roma E ha progettato il presente studio pilota per la definizione di un modello di sperimentazione di priorità clinica, focalizzato su alcune prestazioni ambulatoriali critiche e sulle patologie oncologiche della mammella, del polmone e dell’apparato gastroenterico. Materiali e metodi: è stato costituito un gruppo di Progetto multidisciplinare per il coordinamento, il monitoraggio e la valutazione dello studio che ha coinvolto i medici prescrittori (MMGG e specialisti ambulatoriali, i medici dei Presidi ospedalieri, i Distretti, il CUP. In considerazione dell’estensione del territorio della ASL, della elevata densità di popolazione, della distribuzione dei presidi erogatori, la sperimentazione è stata circoscritta ad un ambito territoriale ristretto, corrispondente a quello del Municipio XVII. Sono stati arruolati 24 MMGG, individuati fra quelli inseriti in forme associative, con una popolazione di circa 30.000 assistiti. Sono state coinvolte sei strutture a gestione diretta insistenti nel Municipio. È stato previsto l’adattamento della procedura informatica di prenotazione, il coinvolgimento e la formazione degli operatori interni ai reparti ospedalieri interessati e del personale addetto al front - office. Risultati: definizione dei criteri clinici di arruolamento nelle classi di prioritarizzazione delle prestazioni ambulatoriali e delle patologie oncologiche con esplicitazione della graduazione del bisogno clinico. Creazione di un

  16. Evaluation of conformal radiotherapy techniques through physics and biologic criteria; Avaliacao de tecnicas radioterapicas conformacionais utilizando criterios fisicos e biologicos

    Energy Technology Data Exchange (ETDEWEB)

    Bloch, Jonatas Carrero

    2012-07-01

    In the fight against cancer, different irradiation techniques have been developed based on technological advances and aiming to optimize the elimination of tumor cells with the lowest damage to healthy tissues. The radiotherapy planning goal is to establish irradiation technical parameters in order to achieve the prescribed dose distribution over the treatment volumes. While dose prescription is based on radiosensitivity of the irradiated tissues, the physical calculations on treatment planning take into account dosimetric parameters related to the radiation beam and the physical characteristics of the irradiated tissues. To incorporate tissue's radiosensitivity into radiotherapy planning calculations can help particularize treatments and establish criteria to compare and elect radiation techniques, contributing to the tumor control and the success of the treatment. Accordingly, biological models of cellular response to radiation have to be well established. This work aimed to study the applicability of using biological models in radiotherapy planning calculations to aid evaluating radiotherapy techniques. Tumor control probability (TCP) was studied for two formulations of the linear-quadratic model, with and without repopulation, as a function of planning parameters, as dose per fraction, and of radiobiological parameters, as the α/β ratio. Besides, the usage of biological criteria to compare radiotherapy techniques was tested using a prostate planning simulated with Monte Carlo code PENELOPE. Afterwards, prostate planning for five patients from the Hospital das Clinicas da Faculdade de Medicina de Ribeirao Preto, USP, using three different techniques were compared using the tumor control probability. In that order, dose matrices from the XiO treatment planning system were converted to TCP distributions and TCP-volume histograms. The studies performed allow the conclusions that radiobiological parameters can significantly influence tumor control

  17. Clinical scientific research with ionizing radiations in Italy. Jurisprudential aspects; Ricerca scientifica clinica con radiazioni ionizzanti in Italia: aspetti normativi e giuridici

    Energy Technology Data Exchange (ETDEWEB)

    Valle, G.; Frusciante, V. [Casa Sollievo della Sofferenza, S. Giovanni Rotondo, FG (Italy). Servizio di Medicina Nucleare; Petrucelli, L. [Ospedale Civile Comiugi Bernardini, Palestrina, RM (Italy). Lab. di Analisi; Podagrosi, V. [Ospedale Santo Spirito, Rome (Italy). Div. di Chirurgia Generale e d' Urgenza; Giustini, A. [Ospedale Santo Spirito, Rome (Italy). Pronto Soccorso

    1999-09-01

    The paper reviews the laws that regulate the clinical scientific research with ionizing radiations in Italy and the effects of ICRP 62, introduced in Italy by the Minister's Decree 21/11/1997, renders invalid all previous rules and regulations which contrast with them. [Italian] Vengono esposte le norme di legge che regolano in Italia la ricerca scientifica clinica con radiazioni ionizzanti e discusse gli effetti dell'introduzione dell'ICRP 62 nella normativa italiana (DM 21/11/1997). Esso tratta in maniera esaustiva l'intera tematica e offre le fondamentali linee guida.

  18. La clinica parapsicologica

    Directory of Open Access Journals (Sweden)

    Evrard Renaud

    2007-09-01

    Full Text Available Gli ultimi due decenni hanno visto nascere una disciplina nuova: l'accoglienza e il sostegno psicologico delle persone che vivono esperienze eccezionali. Avere l'impressione di vivere in una casa abitata, testimoniare l’apparizione di OVNI, interrogarsi sulle possibilità di influenze telepatiche o anche conservare per sé la sensazione irreale di uscire “fuori dal corpo”, sono alcuni esempi di ciò che provano queste persone. L'eterogeneità di queste testimonianze le classifica spesso nella categoria delle "esperienze vissute come paranormali". Se tali resoconti sono sempre pervenuti agli esperti, si deve ai recenti lavori di ripristino dell'ascolto di queste persone.

  19. Meningiomas of pineal region in children Meningiomas da região da pineal em crianças

    Directory of Open Access Journals (Sweden)

    Hamilton Matushita

    2007-12-01

    Full Text Available Meningiomas are uncommon tumors in children and either more rarely encountered in the pineal region. We report two cases of meningioma of the pineal region in children. One of these cases was a five years-old girl and the other a one year-old boy. No specific clinical presentation or tomographic examinations findings was identified before treatment, suggestive of a diagnosis of menigioma. The clinical and laboratory features were very similar to the most common tumors of the pineal region. Prior to the surgery, the histology of these tumors was not suspected. Both patients underwent direct surgery and complete removal was achieved by a suboccipital transtentorial approach. The tumors originated from velum interpositum in both cases. At the follow up, one case presented with recurrence six years later, and she underwent a reoperation with total resection without morbidity. Long-term follow up presented no other recurrences.Meningiomas são tumores poucos frequentes em crianças, e mais raramente encontrados na região da pineal. Relatamos dois casos de meningioma da região da pineal em crianças, uma menina de cinco anos e um menino de um ano de idade. Não foi identificada nenhuma forma de apresentação clinica ou caracteristica tomográfica, antes do tratamento, que sugerisse o diagnóstico de meningioma. As características clinicas e laboratoriais encontradas foram similares às de tumores mais frequentes da região da pineal. Ambos os pacientes foram submetidos ao tratamento cirúrgico e a remoção completa foi obtida por abordagem suboccipital transtentorial. Durante o seguimento, um dos pacientes foi reoperado por recorrencia do tumor seis anos após o tratamento inicial. Atualmente, os pacientes encontram-se livres de recorrência tumoral.

  20. Laser diagnostic and therapy of dental caries: the clinic point of view; Laser diagnostico e tratamento da carie dental: uma visao clinica

    Energy Technology Data Exchange (ETDEWEB)

    Paiva, Priscila Faria

    2001-07-01

    Dental caries's diagnosis is a major dentistry problem from the clinic point of view. The laser beam on the region of 655 nm induces the fluorescence of the compounds present in the hard tissue, quantifying differences between sound and carious enamel and dentine. Diagnodent (Kavo, Germany), showed to be effective regarding dental caries's diagnosis in the present research sampling. The Er:YAG laser (Kavo Key Laser 2, Germany) performed efficient cavity preparations in caries lesions of I and V class type, using up energies that ranged from 300 mJ to 350 mJ with 4 Hz repetition rate for the enamel; and from 250 mJ to 300 mJ with 4 Hz repetition rate for the dentine, and with 80 mJ with 6 Hz of repetition rate for laser conditioning. In the Er:YAG laser preparations no patient was anesthetized even when there were deeper cavities, and the maximum degree of pain ( which ranged from 0 to 10) was 4. In the control group with conventional high-speed drill two patients were anesthetized and the maximum degree of pain was 7. Restorations performed by conventional method of composite were equally satisfying both in caries groups of I and V class type and in the control group. The laser application in the operative dentistry office as a new method of diagnosis and dental preparations should be a good alternative to the use of the conventional dental drill. Nevertheless, dentistry practice has a lot to improve from technology progress, as well as new researches on laser dentistry are necessary in a long term. New types of lasers will come about and will increasingly improve the dental practice assistance and procedures quality. (author)

  1. Schistosomiasis of the central nervous system: clinical and radiologic correlation; Apresentacoes da esquistossomose no sistema nervoso central: correlacao clinica e radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Faria, Andreia Vasconcelos; Cerqueira, Elza Maria Figueiras Pedreira de; Reis, Fabiano; Menezes Neto, Jose Ribeiro; Zanardi, Veronica de Araujo [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia]. E-mail: andrea.vf@ig.com.br; Pirani, Clodoaldo; Damasceno, Benito Pereira [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Neurologia

    2002-02-01

    We report four cases of patients with schistosomiasis in the central nervous system and describe and correlate the radiologic findings with clinical manifestations. In one patient, cerebral involvement presented as a pseudotumoral lesion confirmed by autopsy. Three other patients had schistosomiasis in the spinal cord characterized by an intramedullary mass and radicular and leptomeningeal enhancement after administration of gadolinium. Our findings show the importance of considering schistosomiasis in the differential diagnosis of intramedullary or cerebral lesions in patients of endemic areas of schistosomiasis. (author)

  2. Wood density variation in Gmelina arborea trees using X-ray densitometry; Avaliacao da densidade da madeira de Gmelina arborea pela aplicacao da densitometria de raios-X

    Energy Technology Data Exchange (ETDEWEB)

    Roque, Roger Moya [Instituto Tecnologico da Costa Rica, Cartago (Costa Rica). Centro de Investigacao em Integracao Bosque-Industria. Dept. de Engenharia Florestal]. E-mail: rmoya@itcr.ac.cr; Tomazello, Mario [Sao Paulo Univ., Piracicaba, SP (Brazil). Escola Superior de Agricultura Luiz de Queiroz. Dept. de Ciencias Florestais]. E-mail: mtomazel@esalq.usp.br

    2005-07-01

    The wood density constitutes the main wood quality parameter by its relationship with anatomical, physical and chemical properties and wood utilization. The modern and accurate methods - like X-ray densitometry - are applied to determine the density spatial distribution in wood sections and pith-bark direction. On the other hand, emphasis to wood utilization from fast growing plantations, like Gmelina arborea in Costa Rica, has been done. The objectives of this study were to determinate the influence of 2 climatic conditions of Costa Rica on radial wood density variation of gmelina trees form fast growing plantations using the X-ray densitometry method. Wood samples were cut at DBH of gmelina trees and transversal thin laths were selected at north-south direction and conditioned at 12% moisture content equilibrium and X-rayed. The radiographic films were revealed and scanned a 256 gray scale with 1000 dpi resolution and the intra tree-ring density were determined by CRAD and CERD software. The results demonstrated that the climatic and forest management affects the wood density variability and the distinctness of tree-ring boundaries of gmelina trees, as well as, the applicability of X-ray densitometry in wood quality analysis. (author)

  3. [The scientific progress of the "Clinica del Lavoro Luigi Devoto" as seen through the contents of the journal "La Medicina del Lavoro". ].

    Science.gov (United States)

    Foà, V; Camerino, Donatella

    2003-01-01

    On occasion of the Centenary of the "Clinica del Lavoro Luigi Devoto", its researchers suggested that awareness of its historical identity and scientific development should constitute the basis for the future of the Institution. The directors of the Institute who have succeeded one to the other over the years have left a vivid report of the vast amount of work developed in several research fields and also of the original results achieved with significant impact on the scientific community and on society. Content analysis of "La Medicina del Lavoro" allowed us to shed light on strong bonds existing between manufacturing techniques, work organization and health, in the different political and social periods in which they developed. Many actions have been defined and several research subjects have been renewed (according to current demands and new methodological possibilities) between the past and the present, nevertheless many new approaches need to be taken in the fields of epidemiology, indoor air quality, ergophthalmology, muskuloskeletal disorders, environmental and molecular toxicology, and further research will be undertaken thanks to the potential of this discipline for the future. The aim of this report is also to express our thanks to all the medical and non-medical staff who have made their contribution over 100 years of engagement.

  4. Evaluation of the ocular protection for low intensity therapeutic lasers; Avaliacao da protecao ocular para lasers terapeuticos em baixa intensidade

    Energy Technology Data Exchange (ETDEWEB)

    Cordon, Rosely

    2003-07-01

    The low intensity laser therapy (LILT) has been extensively used in medicine and dentistry presenting positive effects. However, the laser radiation can also cause adverse effects. Due to the ocular focalization property, in the wavelength from 400 to 1400 nm, the retina is more susceptible to damage by radiation than any other part of the human body. Then, the ocular protection is frequently emphasized. This protection must attenuate the radiation to a safe level. The International Electrotechnical Commission (IEC) standard IEC 60825-1 suggests safety requirements for medical laser equipment, including the ocular protection, based on maximum permissible exposure levels. The Brazilian legislation adopts a corresponding IEC standard, the NBR IEC 601.2.22, for safety requirements. The aim of this study was to analyze the adequacy of the ocular protectors furnished by four laser equipment manufacturers, commercially available in Brazil, commonly used for LILT. For this purpose, the laser equipment and the respective ocular protectors were characterized. The adequacy was verified according to the IEC standards. It was found, among other results, ocular protectors attenuating to safe levels the radiation emitted by the respective laser equipment, however, presenting inadequate visual transmission. Inefficient protection and protection indicated in cases where they were not necessary were also observed. (author)

  5. Evaluation of integrity of radiation sources of nuclear gauges; Avaliacao da integridade de fontes radioativas de medidores nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Torohate, Wiclif Francisco

    2016-11-01

    Nuclear equipment meters are mainly used in the industry in quality control and process control. The principle of operation consists in a shielded radioactive source together with a radiation detector such that the radiation interacts with the material to be analyzed before reaching the detector, providing real time data. Can be as their fixed and mobile mobility, the unique properties of ionizing radiation are used in three basic modes, transmission, backscatter or dispersion or induced (reactive). With the advancement and technological modernization in the world, the demand for nuclear gauges becomes increasingly larger. Currently in Brazil there are about 465 process control plants and 21 portable systems and Mozambique about 45 facilities using nuclear gauges. This font registration is done through a process called source inventory that allows also to know the category of the source, the danger or risk to human health that the source offers. The handling of this equipment requires personnel, certified, skilled and well trained in radiation protection area in accordance with the requirements of the various CNEN Rules. Due to the presence of radioactive source and because these devices are used by workers risk because there external radiation. In this context, we made the smear test in two fixed meters from the IRD industry laboratory, which determines the integrity of the source package, mandatory item in periodic integrity testing of the radiation source of this type of device. A set of procedures is made for its implementation as an evaluation of the radiological risk by radiological survey. It was intended to contribute to the learning handling and safe use of these meters. (author)

  6. Methodology to evaluate operational safety in offshore wells; Uma metodologia para a avaliacao da seguranca operacional em pocos maritimos

    Energy Technology Data Exchange (ETDEWEB)

    Miura, Kazuo [PETROBRAS, RJ (Brazil). Unidade de Negocio de Exploracao e Producao da Bacia de Campos. Gerencia de Engenharia de Poco], e-mail: kazuo.miura@petrobras.com.br; Morooka, Celso Kazuyuki; Mendes, Jose Ricardo Pelaquim [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)], e-mail: morooka@dep.fem.unicamp.br; Guilherme, Ivan Rizzo [Universidade Estadual de Sao Paulo (UNESP), SP (Brazil)], e-mail: ivan@rc.unesp.br

    2006-12-15

    The main concern with activities developed in oil and gas well construction is safety. The safety assessment during the well construction process is not a trivial issue. Today's risk evaluation approaches are based on static analyses of existent systems, not allowing a dynamic evaluation of the risk at each alteration of circumstances. This work proposes the use of quantitative and dynamic risk assessment (QDRA) to assess the degree of safety of each planned job. The QDRA is a type of 'safe job analysis' approach, developed to quantify the degree of safety in the entire well construction process, as well as during maintenance activities. The QDRA is intended to be applied during the planning stages of well construction and maintenance, where the effects of hazard on the job sequence are important unknowns. The definitions of 'barrier' and 'barriers integrated set (BIS)', as well as a modeling technique showing their relationships, are presented. (author)

  7. Evaluation of the energetic equivalence of goat manure biogas; Avaliacao da equivalencia energetica do biogas de esterco de caprinos

    Energy Technology Data Exchange (ETDEWEB)

    Canafistula, Francisco Jose Firmino; Carvalho, Paulo Cesar Marques de [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Engenharia Eletrica], e-mails: firmino@ufc.br, carvalho@dee.ufc.br

    2008-07-01

    The present paper shows the results of a research about a new production system model based on goats; part of the animals manure is used for biogas production. The biogas is used as fuel for water pumping for the irrigation of the animals pasture. For the viability of the project, a photovoltaic powered electrified fence was used. Additional to the positive results of sustainability, innovative solutions were developed for sizing, optimization and costs reduction by the use of digesters in small rural communities of the semi-arid of the Brazilian Northeast Region. (author)

  8. The flicker phenomenon: causes, effects, limits, evaluation and correction; O fenomeno da cintilacao (flicker): causas, efeitos, limites, avaliacao e correcao

    Energy Technology Data Exchange (ETDEWEB)

    Wierda, Rene [Schneider Electric (France)

    2003-08-01

    This paper analyzes the light flicker, and describes the voltage fluctuations induced by power variable loads in the lamps luminosity. The paper defines the visual discomfort and presents flicker measurement methods imposed by the normalization, including two calculation examples. The paper also shows the possible corrective actions for diminishing the effects.

  9. Evaluation of welding by MIG in martensitic stainless steel; Avaliacao da soldagem pelo processo MIG em aco inoxidavel martensitico

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, M.A. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil); Mariano, N.A.; Marinho, D.H.C. Marinho, E-mail: neideaparecidamariano@gmail.co [Universidade Federal de Alfenas (UNIFAL), Pocos de Caldas, MG (Brazil)

    2010-07-01

    This work evaluated structure's characterization and mechanical properties after the welding process of the stainless steel CA6NM. The employed welding process was the metal active gas with tubular wire. The control of the thermal cycle in the welding process has fundamental importance regarding the properties of the welded joint, particularly in the thermally affected zone. The mechanical properties were appraised through impact resistance tests and the hardness and microstructure through metallographic characterization and Ray-X diffraction. The parameters and the process of welding used promoted the hardness and toughness appropriate to the applications of the steel. Welding energy's control becomes an essential factor that can affect the temperature of carbide precipitation and the nucleation of the retained austenite in the in the region of the in the thermally affected zone. (author)

  10. Evaluation of kerma rate in radioactive waste disposal; Avaliacao da taxa de kerma em deposito de rejeitos radioativos

    Energy Technology Data Exchange (ETDEWEB)

    Rosa, Rodolfo O.; Silva, Joao C.P.; Santos, Joao R. dos, E-mail: oliveira@ien.gov.br, E-mail: jcarlos@ien.gov.br, E-mail: regis@ien.gov.br [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2014-07-01

    This study aims to assess the progression of kerma rate levels in the air due to the increase of collection, storing and storage of radioactive waste in the new building (after expansion) of the radioactive waste disposal (RWD) of the Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Brazil. This review is carried out every six months at IEN with thermoluminescent dosimeter lithium fluoride LiF: Mg, Cu, P (TLD-100H). Here are the average values of kerma rate for the period 2008- 2012. In this context, the methodology used for selection and choices of detectors used in dosimeters is presented. The detectors were chosen through homogeneity criteria of the pack, standardization factor and coefficient of variation (CV%). The monitoring points and the exposure time of the detectors are chosen considering various factors, including the rate of occupation and indoor and outdoor positions to RWD. These evaluations showed that the contribution of the new waste disposal in increasing kerma rate of IEN, has proved to be insignificant, that is, the presence of RWD does not contribute to increased environmental kerma rate in the region around this installation.

  11. Evaluation of the absorbed dose in odontological computerized tomography; Avaliacao da dose absorvida em tomografia computadorizada odontologica

    Energy Technology Data Exchange (ETDEWEB)

    Legnani, Adriano; Schelin, Hugo R.; Rocha, Anna Silvia P.S. da, E-mail: schelin@utfpr.edu.b, E-mail: anna@utfpr.edu.b [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Khoury, Helen J., E-mail: khoury@ufpe.b [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2011-10-26

    This paper evaluated the absorbed dose at the surface entry known as 'cone beam computed tomography' (CBCT) in odontological computerized tomography. Examination were simulated with CBCT for measurements of dose. A phantom were filled with water, becoming scatter object of radiation. Thermoluminescent dosemeters were positioned on points correspondent to eyes and salivary glands

  12. Evaluation of elemental composition of clays from Campos Gerais (MG); Avaliacao da composicao elementar de argilas de Campos Gerais (MG)

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Joao P.M.; Maduar, Marcelo F.; Silva, Paulo S.C da, E-mail: jpmm0697@hotmail.com [Instituto de Pesquisas Energeticas e nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2013-07-01

    There are numerous applications given to clays including oil and water adsorbent, ceramic, whitening of beverages, porcelain, waste treatment, organic carrier molecules in cosmetics and pharmaceuticals, support for catalysts. In the pharmaceutical industry, the clays are used as excipients, diluents, desiccants, emulsifiers, to mask undesirable flavors, isotonic agent such as charger and delivery of active substances. These characteristics have contributed to the expansion of the search for applications of clay minerals in the cosmetic industry. The aim of this study was to determine the elemental composition of clays from Campos Gerais, Minas Gerais, with a view to their applicability in the production of cosmetics. The elements As, Ba, Br, Ce, Cl, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Sm, Ta, Tb, Th,U, Yb and Zn were determined by neutron activation analysis and radionuclide activity concentration of {sup 226}Ra, {sup 228} Ra, {sup 210}Pb and {sup 40}K were determined by gamma spectrometry. It was verified that the activity concentration of radionuclides was in the same concentration as the global average, indicating that these samples do not present a risk of increased radiation exposure. The concentration of most elements determined is less than or equal to the overall mean concentrations, indicated by the values of Continental Upper Crust. (author)

  13. External exposure assessment in dwelling built with phosphogypsum; Avaliacao da exposicao externa em residencia construida com fosfogesso

    Energy Technology Data Exchange (ETDEWEB)

    Villaverde, Freddy Lazo

    2008-07-01

    In this study it was evaluated the viability of the use of phosphogypsum plates as a building material in the dwelling construction. Thus, the effective dose due to external gamma exposure was assessed through the {sup 226}Ra, {sup 232}Th, {sup 210}Pb e {sup 40}K activity concentration in phosphogypsum plates. Samples of this material were analyzed by high resolution gamma spectrometry for their natural radionuclide activity concentration. The radium equivalent activity and extern ai and inter nai hazard indices were also calculated. The plates were made with phosphogypsum from fertilizer industries located in Cajati, Cubatao and Uberaba. The samples were identified according to phosphogypsum origin, Cajati (CA), Cubatao (CT) and Uberaba (UB). The activity concentrations results varied from 15.9 to 392 Bq kg{sup -1} for {sup 226}Ra, 26.1 to 253 Bq kg{sup -1} for {sup 232}Th, and 27.4 to 852 Bq kg{sup -1} for {sup 210}Pb. The results of {sup 40}K were lower than 81 Bq kg{sup -1}. The annual effective dose was obtained through the dosimetric model with reference standard room concept, the results were 0.02 mSv y{sup -1} for a house built with phosphogypsum from origin CA, 0.2 mSvy{sup -1} for CT phosphogypsum and 0.14 mSvy{sup -1} for UB phosphogypsum, everything the effective doses were below 1 mSvy{sup -1}, an annual effective dose limit for public exposure by International Commission on Radiological Protection. (author)

  14. Evaluation of radioiodinetherapy protocol for patients with Plummer disease; Avaliacao do protocolo da radioiodoterapia para pacientes com doenca de Plummer

    Energy Technology Data Exchange (ETDEWEB)

    Mendonca, Keyla Mary Cavalheiro; Antonio Filho, Joao; Brandao, Simone Cristina Soares, E-mail: keylamcm@yahoo.com.br, E-mail: jaf@ufpe.br, E-mail: simonecordis@yahoo.com.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Santos, Marcus Aurelio P. dos, E-mail: masantos@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2014-07-01

    The disease Plummer (DP) is generated by the thyroid cells that function autonomously, independent the rest of the organ parenchyma. The DP presents a prevalence of 1% to 9%, higher in regions with iodine deficiency, affecting six women for every man. The study was conducted at the Department of Nuclear Medicine of Universidade Federal de Pernambuco (UFPE) from {sup 99m}Tc data capture and mass existing in the thyroid records of 54 patients with PD who underwent radioiodine therapy with fixed activities 1110 megabecquerels (MBq) from 2004 to 2008. For capitation of {sup 99m}Tc from a group of 22 patients were used 5 ml syringes, measured by a Capintec CRC-7 model activimeter, having scintigraphy after 20 minutes and results in a region of interest. Mass evaluation was based on method of palpation of the thyroid, considering the mass standard. It is observed that 68.2% of patients received more activity than needed, 31.8% were less active, and none received activity in accordance with your needs. There was a statistically significant difference (p <0.05) between the fixed activities and activities computed for all patients, according to Chi-square test for independence with 21 degrees of freedom. The cure rate of a group of 32 patients was 75% after one year of follow-up. It is suggested that the RIT is preceded by an assessment of the maximum percentage of uptake and thyroid mass.

  15. Competencies evaluation of the petroleum industry local suppliers; Avaliacao de competencias dos fornecedores locais da industria do petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Marzani, Bianca Santos; Furtado, Andre Tosi [Universidade Estadual de Campinas, SP (Brazil). Inst. de Geociencias. Dept. de Politica Cientifica e Tecnologica]. E-mail: bianca@ige.unicamp.br; furtado@ige.unicamp.br

    2003-07-01

    This article presents a research proposition that focuses on competencies evaluation of the local suppliers of goods and services in the petroleum industry. Because of the new context created by the opening of the petroleum market the suppliers to face a new competition environment, exposed to the foreign suppliers that operate in a higher production scale and have great financial and technological capacities. This justifies the development of the current study because the final diagnosis will help the studied companies in their decision process by the divulgation of their weaknesses and potentialities, which will motivate an improvement in the sector. In this paper, we include technological, organizational and relational competencies. Moreover, some of the main contributions of the literature about these topics are presented, including Lall, Kim, Figueiredo, Furtado, Munier, etc. (author)

  16. Evaluation of the dispersion of oil refinery liquid effluent; Avaliacao da dispersao de efluente liquido de refinaria de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Mariano, Adriano Pinto; Silva, Ariovaldo Jose da; Oliveira, Valdenilson Jose Alves de; Angelis, Dejanira de Franceschi de [Universidade Estadual Paulista (UNESP), Rio Claro, SP (Brazil). Dept. de Bioquimica e Microbiologia. Inst. de Biociencias], e-mail: adrianomariano@yahoo.com.br

    2010-07-15

    In this paper, two techniques to evaluate the dispersion of the effluent of an oil refinery are presented. Thus, the dispersion plume was characterized by field measurements of electrical conductivity and by computational simulation (Cormix simulator). An oil refinery whose effluent is discharged on the Atibaia river (Paulinia/SP) is taken as study case. The behavior of the effluent was evaluated until 1000 m after the discharge. The results show that the measurement of electrical conductivity is a suitable technique to evaluate the dispersion of oil refinery wastewaters, since they have high conductivity and for this reason there is a strong contrast between the values of the wastewater and the ambient background. Furthermore, other water quality parameters had a dispersion behavior similar to that shown by the conductivity. The dispersion plume generated by the computational simulator showed high concordance with the field data. In this manner, computational simulation can be a useful tool to evaluate the dispersion of discharges considering hypothetical scenarios, as well as to design the discharge channel. (author)

  17. Evaluation of external exposure in a radioactive waste deposit; Avaliacao da exposicao externa em um deposito de rejeitos radioativos

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Sergio Quinet de; Pereira, Wagner de Souza; Py Junior, Delcy de Azevedo; Dores, Luis Augusto de Carvalho Bresser; Dantas, Marcelino Vicente de Almeida; Silva, Ana Claudia Antunes; Garcia Filho, Oswaldo, E-mail: wspereira@inb.gov.b, E-mail: sergioquinet@inb.gov.b, E-mail: delcy@inb.gov.b, E-mail: luisdores@inb.gov.b, E-mail: marcelino@inb.go.b, E-mail: anasilva@inb.gov.b, E-mail: ogarcia@inb.gov.b [Industrias Nucleares do Brasil (UTM/INB), Pocos de Caldas, MG (Brazil). Unidade de Tratamento de Minerio

    2011-10-26

    The ore treatment unit (OTU) of Industrias Nucleares do Brasil (INB), located at Caldas municipality - Minas Gerais, Brazil, posses a radioactive deposit, coming mainly from the chemical processing of monazite sands for obtention of 'rare earths'. The main components of these waste are the 'torta II (thorium rich residues) and the 'mesothorium' ({sup 228}Ra rich residues) - conditioned in steel drums (200 liters), plastic pumps (100 liters) or underground silos. These loaders are deposited in waste loading warehouses existent at the OTU and periodic evaluations of the external exposure rates (mR/h) are part of the 'Programa de Monitoracao Radiologica Ocupacional' of the unit. This paper presents a brief history of origins of this waste deposit and the material found there, and also the result of a routine monitoring of the external exposure rates

  18. Evaluation of measurement methods for diffuse solar radiation; Avaliacao de metodos de medicao da radiacao solar difusa

    Energy Technology Data Exchange (ETDEWEB)

    Ricieri, Reinaldo Prandini; Escobedo, Joao Francisco; Almeida Frisina, Valeria de [UNESP, Botucatu, SP (Brazil). Faculdade de Ciencias Agronomicas. Dept. de Ciencias Ambientais

    1998-07-01

    The evaluation results from measuring methods of the diffuse solar radiation, disc and shadow ring are described compared to the method by difference between the global radiation and the direct radiation projected in a horizontal plane. The disc method is dependent on the diffuse radiation anisotropy, with an average relative deviation around 7.1% with percentages according to the sky cover; 11.56% for open sky days; 4.8% for partly cloudy days and 2.43% for cloudy days. The shadow ring method is also sky cover dependent with an average relative deviation 8.0% ranging from 8.99% for open sky days; 7.70% for partly cloudy and 2.5% for cloudy days. (author)

  19. Índices bióticos para avaliação da qualidade ambiental em trechos do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil = Biotic indexes for the evaluation of environmental quality in stretches of the Correntoso river, Pantanal do Negro, Mato Grosso do Sul State, Brazil

    Directory of Open Access Journals (Sweden)

    Fábio Henrique da Silva

    2011-07-01

    Full Text Available Este trabalho teve como objetivo pesquisar a estrutura da comunidade de insetos aquaticos, utilizando esta comunidade como indicadora da qualidade ambiental de um trecho do rio Correntoso, Pantanal do Negro, Mato Grosso do Sul, Brasil. Foram realizadas seis campanhas de coleta em diferentes periodos sazonais: vazante, seca e cheia. Os organismos foram coletados utilizando rede D com malha de 300 ƒÝm eesforco amostral de cinco lances de rede nas raizes dos bancos de macrofitas. Foram comparados tres ambientes (aberto, intermediario e fechado, por juncao dos dados obtidos de seis sitios de coleta. Foi analisada a riqueza, abundancia absoluta e relativa das familias de insetos amostrados e a avaliacao da qualidade da agua usando o indiceBMWP, indice BMWP-ASPT, indice IBF e indice de diversidade de Shannon-Wienner, com log2. Foram registradas 60 familias pertencentes a 12 ordens da Classe Insecta, totalizando 19.773 individuos coletados. Entre os indices aplicados, o indice BMWP foi o que melhor representou as condicoes do ambiente estudado.This work aimed to research the aquatic insect community structure using this community as a bioindicator of the environmental quality in a stretch of the Correntoso river, in Pantanal do Negro, Mato Grosso do Sul, Brazil. Six collections were taken in different seasonal periods; ebb, dry and wet. The organisms were collected using a 300 ƒÝm mesh D net sweeping five times through the roots of macrophyte banks at each sample. Three environments were compared (open, intermediary, closed by adding the information from six collection sites. Family richness, absolute and relative abundance ofinsect samples and an evaluation of water quality were analyzed by using the BMWP index, BMWP-ASPT index, IBF index and Shannon diversity index, with log2. A total of 60 families from 12 orders of Insecta Class were recorded, totaling 19,773 individuals. Among the indexes applied, the BMWP index was the one that best

  20. Estudo sobre a evasão de pacientes em psicoterapia oferecida pela clínica escola da Unipan/Anhanguera de Cascavel-PR por membros da comunidade de baixa renda

    OpenAIRE

    Siqueira, Vinicius Reis de; Unipan - Anhanguera

    2013-01-01

    Considerando-se a importância da psicoterapia individual para os psicólogos, e o fato de existir um número consideravelmente alto de desistências da psicoterapia por pessoas que possuem uma baixa renda, este estudo buscou verificar os possíveis motivos que levam a evasão desta população na clinica escola da UNIPAN/Anhanguera de Cascavel/PR. Para tanto houve um processo de seleção dos atendimentos realizados no ano de 2010 para alcançar esta população (de baixa renda que desistiu em até 7 enco...

  1. Segurança da aplicação topica de fluor em gel

    OpenAIRE

    Nelson D'Angelo

    1991-01-01

    Resumo: O relato de distúrbios gastrointestinais é frequente após a aplicação tópica de flúor em gel, sendo que 5.O mg/kg é considerada a dose provavelmente tóxica (DPT) de flúor. O objetivo deste trabalho foi estimar a segurança do procedimento clínico de aplicação de flúor na forma de gelo Para tal, foram utilizados 3 produtos profissionais de flúor em gelo que foram aplicados em 13 crianças da clinica da FOP, estabelecendo-se o intervalo de uma semana entreas aplicações. A aplicação foi fe...

  2. Chilhood leprosy: Clinical and epidemiological study in the Department of Dermatology, Clinicas Hospital, Faculty of Medical Sciences, National University of Asuncion-Paraguay, 2005-2014

    Directory of Open Access Journals (Sweden)

    Beatriz Di Martino Ortiz

    2016-01-01

    Full Text Available Introduction: Leprosy in childhood is not a common finding. The risk of a child to develop the disease is 4 times greater in contact with close people and 9 times higher among household contacts. The maximum risk observed is when the contact is Multibacillary (MB and intradomicilliary. Leprosy in childhood reflects the clinical characteristics of adult, with some peculiar aspects. Non-contagious forms (IL and TT are common during childhood. The contagious forms (BB, LB and LL are less frequent due to higher required incubation period. Aim: To describe the clinical and epidemiological characteristics of childhood leprosy in the Department of Dermatology, Clinicas Hospital from January 2005 to July 2014. Methods: Retrospective, observational cross-sectional study with an analytical component. Results: The total number of leprosy patients was 369, and of these 11 were pediatric patients (2.98% with a predominance of males (8/11 from 3 to 16 years. The BI ranged from negative to 3+. 6/11 were MB. The evolution was good in all cases and two patients developed leprorreactions. The lesions were predominant in facial location. 6/11 patients had family contacts. Conclusions: Leprosy in children is more common than is reported, especially in endemic areas. In <5 years, the disease is very rare. More than half of the cases of children with leprosy have a positive contact. It is considered that in <5 years the spread is always intradomiciliary; this shows the importance of monitoring contacts, which will be possible with the determination of all stakeholders in order to banish the undetected cases and prevent damage.

  3. [The centenary of the founding of the "Clinica del Lavoro Luigi Devoto" in Milan (1902-2002). The oldest health organization in the world for the study, treatment, and prevention of occupational diseases].

    Science.gov (United States)

    Grieco, A

    2003-01-01

    The foundation of the Clinica del Lavoro by Luigi Devoto cannot be dated back to the specific date of an event or, worse, to the official inauguration as has happened so far. It can rather be considered as a process started on November 20, 1902 (date of the first resolution by the Milan Municipality Council), continuing with the national law n. 365 of July 9, 1905, then with the laying of the first stone on December 11, 1907 bearing the motto of the Milanese School "In aliis vivimus, movemur et sumus" and finally the official inauguration on March 20, 1910. The Founder Luigi Devoto was born in 1864 at Borzonasca (Genoa) and took a degree of medicine and surgery at the Genoa University in 1888. After a period in Prague and then in Genoa, he was appointed temporary teacher of medical pathology in Pavia. He published several scientific contributions in different fields of occupational health (lead intoxication, ankylostomiasis, strain cardiopathy, etc.) and in other branches (tuberculosis, pellagra, etc.) that he considered as indirectly work-related diseases. He died in Milan in 1936. Three issues characterize the ingenious intuition of Luigi Devoto and his thirty-year direction of the Clinica del Lavoro: 1. Full respect for the principles of discipline and scientific method suggested by Bernardino Ramazzini; 2. The extremely broad conception of the diseases that had to be considered as "workers' diseases"; 3. The constant social attention towards the application of scientific knowledge also through workers' information and updating of regulations to improve working conditions. Many of the conflicts and events associated with the foundation of the Clinica del Lavoro can be summarized in the name chosen by the Founder. Actually to those asking why "Clinic of Work" and not "Clinic of Workers", Devoto used to reply that it was work that was ill and therefore it was necessary to treat the work to prevent workers' illnesses.

  4. Evolução dos conhecimentos sôbre a cardiopatia da doenca de Chagas: revisão crítica da literatura

    Directory of Open Access Journals (Sweden)

    Francisco S. Laranja

    1949-12-01

    Full Text Available Foi feita uma revisão critica da literatura sobre cardiopatia da Doença de Chagas, discutindo-se os principais aspectos clínicos desta cardiopatia á luz da experiência por nós adquirida nestes últimos anos. A evolução dos conhecimentos clínicos sobre esquisotripanose pode ser sintetisada em três fases: a A primeira corresponde á descoberta da doença, feita por Chagas, e á descrição por ele e seus primeiros colaboradores das manifestações clínicas essenciais da nova entidade mórbida, na qual distinguiu a forma aguda e várias formas crônicas. b Na segunda fase, a pesquisa orientou-se essencialmente pela busca dos casos de infecção aguda, havendo considerável duvida a respeito da realidade clinica das formas crônicas da infecção. Durante um longo período raros casos de cardiopatia crônica foram publicados. Ate o momento acual (1948 encontram-se na literatura estrangeira 134 casos de cardiopatia crônica chagásica, dos quais 9 autopsiados; ate fins de 1944, o numero de casos publicados no Brasil, fora de Lassance, era de 45, dos quais 3 autopsiados. c A terceira fase ou fase atual, tende a caracterisar-se por um interesse particular nos casos de infecção crônica, orientando-se porém a pesquisa cli¬nica essencialmente pelas manifestações da cardiopatia. Contribuições recentes de ordem clínica e experimental trouxeram ampla confirmação as idéias de Chagas a respeito desta cardiopatia e colocaram-na em posição de entidade clinica de realidade indiscutível. Sua importância social esta sendo determinada e os dados disponíveis já lhe apontam relevante significação em certas regiões. Mais de 600 casos de cardiopatia crônica chagásica foram publicados no Brasil nestes últimos quatro anos.

  5. Density evaluation by computerized tomography in plain soils over different manipulation systems; Avaliacao da densidade pelo metodo da tomografia computadorizada de um planossolo sob diferentes sistemas de manejo

    Energy Technology Data Exchange (ETDEWEB)

    Pedrotti, Alceu [Lavras Univ., MG (Brazil). Dept. de Ciencia do Solo; Pauletto, Eloy Antonio [Pelotas Univ., RS (Brazil). Dept. de Solos; Crestana, Silvio [Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA), Sao Carlos, SP (Brazil). Centro Nacional de Pesquisa e Desenvolvimento de Instrumentacao Agropecuaria (CNPDIA)

    1996-08-01

    The objective of this paper is the evaluation of a plain soil density in different culture systems determined by X ray computerized tomography.It was observed a larger variation in densities in soils profiles analysed. The identification of layers is better utilising computerized tomography than others technic 1 fig.

  6. Evaluation of X ray attenuation by means of radiographic images; Avaliacao da atenuacao da radiacao X por meio de imagens radiograficas

    Energy Technology Data Exchange (ETDEWEB)

    Barros, Frieda Saicla, E-mail: saicla@utfpr.edu.b [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Paredes, Ramon S.C., E-mail: ramon@ufpr.b [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil); Godoi, Walmor C., E-mail: walmor.godoi@gmail.co [Faculdade de Tecnologia Camoes (FATEC), Curitiba, PR (Brazil); Souza, Gabriel Pinto de [Universidade Estadual Paulista (UNESP), SP (Brazil)

    2011-07-01

    This paper's main goal is to adopt a qualitative methodology to evaluate the attenuation of x-radiation through X-ray images in polymeric materials plus residual lead. To determinate the images it was initially used an experimental setup at the Laboratory for Materials Diagnostics LACTEC. These results correspond to a more qualitative analysis, even with quantitative answers. Through analysis of radiographic images we can measure the intensity of radiation that goes through the plate, making possible to establish a relationship between the attenuation coefficient and the thickness of the material. (author)

  7. Ribeira do Iguape basin water quality assessment for drinking water supply; Avaliacao da qualidade da agua na bacia hidrografica do Ribeira de Iguape com vistas ao abastecimento publico

    Energy Technology Data Exchange (ETDEWEB)

    Cotrim, Marycel Elena Barboza

    2006-07-01

    Ribeira do Iguape Basin, located in the Southeast region of Sao Paulo state, is the largest remaining area of Mata Atlantica which biodiversity as rich as Amazon forest , where the readiness of water versus demand is extremely positive. With sparse population density and economy almost dependent on banana agriculture, the region is still well preserved. To water supply SABESP (Sao Paulo State Basic Sanitation Company). Ribeira do Iguape Businesses Unit - RR, uses different types of water supplies. In the present work, in order to ascertain water quality for human consumption, major and minor elements were evaluated in various types of water supply (surface and groundwater's as well as the drinking water supplied). Forty three producing systems were monitored: 18 points of surface waters and treated distributed water, 10 points of groundwater and 15 points of surface water in preserved areas, analyzing 30 elements. Bottom sediments (fraction < 63 {mu}m) were also evaluated. The sampling period covered dry and wet seasons from March 2002 to February 2003. The descriptive analysis showed that Al, Fe and Mn, exceeding CONAMA 357 quality guideline. A comparison of the elemental concentrations with the Brazilian Drinking Water Legislation (Portaria 518/04) showed that with the exception of some violations, the levels of all the elements investigated were below the Brazilian Legislation maximum allowed concentrations. This study examined the relationship between the type of water supply and the quality of water used, showed different characteristics on Ca, Fe, Mn concentration. In bottom sediments (fraction <63 {mu}m), Al, Fe and Mg largest concentrations were found. Pb and Zn presents concentrations up to 142,0 {mu}g.g{sup -1} and 172 {mu}g.g{sup -1}, respectively. Data revealed that trace elements concentration in the sediment were below PEL (Probable Effect Level - probable level of adverse effect to the biological community), exception for Pb in Sete Barras and Eldorado. (author)

  8. Use of different simulators to quality evaluation of image quality in digital mammography; Utilizacao de diferentes simuladores na avaliacao da qualidade da imagem em mamografia digital

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Leslie S.; Coutinho, Celia M.C., E-mail: leslie@ird.gov.br, E-mail: celia@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Magalhaes, Luis A.G.; Almeida, Carlos Eduardo de, E-mail: luisalexandregm@hotmail.com, E-mail: cea71@yahoo.com.br [Universidade do Estado do Rio de Janeiro (LCR/UERJ), Rio de Janeiro, RJ (Brazil). Laboratorio de Ciencias Radiologicas

    2013-11-01

    In this study, the digital images were acquired with different exposure simulators to evaluate the quality of the image, noting the tumor mass detection, microcalcification fiber and representing regions of interest during mammography. The technical parameters of exposure depends on the thickness and composition of the breast, thus affecting the dose and image quality. The simulators were used: ACR, SBP 1054, BREAST PHANTOM CIRS and for evaluation of image quality, as well as measures kerma incident on the entrance surface (Ki) and calculating the mean glandular dose (MGD)

  9. Evaluation of the introduction of cogeneration for refrigeration in the fisheries sector of the Amazon; Avaliacao da introducao da cogeracao para refrigeracao no setor pesqueiro do Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, Ricardo Wilson Aguiar da [Universidade Estadual do Amazonas (UEA), Manaus (Brazil)], e-mail: rcruz@uea.edu.br; Nebra, Silvia Azucena [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Engenharia Mecanica], e-mail: sanebra@fem.unicamp.br; Cartaxo, Elizabeth Ferreira [Universidade Federal do Amazonas (UFAM), Manaus, AM (Brazil)], e-mail: ecartaxo@ufam.edu.br

    2004-07-01

    This work analyses the opportunity to introduce cogeneration for the production of aquammonia absorption refrigeration in the autonomous Amazons State power system, by one hand as a means to improve its efficiency and by another, solve the deficiency the State has to store its fish-ing production. (author)

  10. Synthesis and evaluation of phytotoxic activity of {alpha}-Santonin derivatives; Sintese e avaliacao da atividade fitotoxica de derivados da {alpha}-Santonina

    Energy Technology Data Exchange (ETDEWEB)

    Alvarenga, Elson S.; Barbosa, Luiz C.A.; Saliba, William A.; Arantes, Francisco F.P.; Demuner, Antonio J. [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Quimica]. E-mail: elson@ufv.br; Silva, Antonio A. [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Fitotecnia

    2009-07-01

    Mixtures of {alpha}-Santonin and various solvents were irradiated by either high or low pressure mercury lamps. The photochemical reactions afforded lumisantonin (11) (76% in acetonitrile), (3 S,3a S,9{beta}S)-3,6,6-trimethyl-3,3a,4,5-tetrahydronafto[1,2-b]furan-2,7({eta}6,9{beta}{eta}) dione (12) (100% in acetonitrile), 10{alpha}-acetoxy-3-oxo-1,7{alpha}H{eta},6,11{alpha}a{eta}-guaia-4-en-6,12-oli= de (8) (26% in acetic acid), 10{alpha}-hydroxy-3-oxo-1,7{alpha}a{eta},6,11{alpha}{eta}-guaia-4-en-6,12-olid= e (10) (32%) and (E)-3-((3 S,3a S,7{alpha}S)-3-methyl-2-oxo-6-(propan-2-ylidene)hexahydrobenzofuran- 7 - (7{alpha}{eta})-ylidene)propanoic acid (9) (44%) (in water/ acetic acid 1:1, v/v). Lactone 12 was also prepared by irradiation of lumisantonin in diethyl ether. Lactones 8 and 10 were converted, respectively, into the 10 {alpha}-acetoxy-3{alpha}-hydroxy-1,7{alpha}H,6,11{alpha}H-guaia-4-en-6,12-olid= e (13) (87%) and 3a,10a-dihydroxy-1,7{alpha}H,6,11{alpha}H-guaia-4-en-6,12-olide (14) (75%) by sodium borohydride reduction. The effects of the compounds on the development of radicle of Sorghum bicolor and Cucumis sativus were evaluated. (author)

  11. Radiographic evaluation of adenoidal size in children: methods of measurement and parameters of normality; Avaliacao radiografica da adenoide em criancas: metodos de mensuracao e parametros da normalidade

    Energy Technology Data Exchange (ETDEWEB)

    Araujo Neto, Severino Aires de [Centro de Assistencia Integral a Saude da Mulher (CAISM), Campinas, SP (Brazil)]. E-mail: severinoaires@hotmail.com; Queiroz, Suelio Marinho de [Tomovale, Sao Jose dos Campos, SP (Brazil); Baracat, Emilio Carlos Elias [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Pediatria; Pereira, Ines Minniti Rodrigues [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas. Dept. de Radiologia

    2004-12-01

    Radiograph of the nasopharynx is still the most commonly used imaging method to investigate the adenoidal tissue. Due to the variety and complexity of proposed methods to measure the adenoid size, some radiologists prefer subjective evaluation, which can, however, be imprecise and inaccurate. We review and describe several methods to determine the adenoid size, taking into account the practicity, accuracy and precision with the aim of pointing out the best methods to be applied in daily routine practice. (author)

  12. Evaluation of the morphological alteration of the root surface radiated with a diode laser; Avaliacao da alteracao morfologica da superficie cimentaria irradiada com laser de diodo

    Energy Technology Data Exchange (ETDEWEB)

    Gulin, Mauricio

    2003-07-01

    The diode laser has been studied for periodontal therapy, as much for removal of calculus as for microbial reduction of periodontal pockets, as well as the visible analgesic effects and biomodulation capacity. For this reason the purpose of this study was to evaluate the morphological alteration of the root surface after radiation with the diode laser, 808 nm through analysis by scanning electron microscopy (SEM). Besides this, to verify the temperature variations caused during the radiation, a thermometer put into the dentinal wall of the root canal was used. In all, 18 teeth were used, 15 of which for the SEM study, and the other 3 were used to temperature variation analysis. The 25 samples were scraped on the root surface and planed with manual instruments. The other 5 were not subjected to any type of treatment. This, 6 groups of 5 samples each were formed. Control Group C whose samples had not received any treatment; Control Group C 1 was only scraped and polished conventionally with Hu-Friedy Gracey curettes 5 and 6; the other samples groups L1, L2, L3, L4 were radiated by diode laser using parameters of power 1,0 W; 1,2 W; 1,4 W; and 1,6 W respectively, 2 times for 10 seconds with 20 seconds intervals between each radiation in continuous mode. The results with relation to the increase of temperature in the interior of the root canal demonstrated that there was an increase of more than 5 degree Celsius. The results of the scanning electron microscope analysis of Control Group C demonstrated great irregularity and ridges on the root surface, with the presence of a dentine layer. Control Group C1 presented a similar aspect to Group L 1's, smoother and more homogeneous surface. Groups L2, L3, and L4 presented scratches alternating with smoother areas showing that fiber contacted the surface of the sample. The results reconfirmed the necessity of further studies using diode laser, with a beam of light emitted in an interrupted mode to improve the control of the increase of temperature during radiation, and probably followed by a new scraping and root polishing with conventional instruments in an attempt to obtain a smoother and more homogeneous root surface. (author)

  13. Evaluation of antimony efficiency on nickel passivation in PETROBRAS refineries; Avaliacao da efetividade do antimonio para passivacao de niquel nas refinarias da PETROBRAS

    Energy Technology Data Exchange (ETDEWEB)

    Cerqueira, Henrique Soares; Pimenta, Ricardo Drolhe M. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas. Setor de Pesquisa, Desenvolvimento e Engenharia de Abastecimento]. E-mail: henriquecerqueira@cenpes.petrobras.com.br; Baugis, Guintar Luciano; Tan, Mauricio Hoansan [PETROBRAS, Maua, SP (Brazil). Refinaria de Capuava (RECAP)

    2001-12-01

    In the present paper, a brief review concerning the use of antimony as nickel passivator is presented. X-ray fluorescence analysis of equilibrium catalysts from several fluid catalytic cracking units in Petrobras refineries indicates that the Sb/ Ni ratio currently in use is very low (approx. 0.1) and that neither the coke nor the gas factor obtained in laboratory tests (MAT) are correlated with eh Sb/Ni ratio. An experiment in the cyclic deactivation unit doping the feedstock (GOP cabiunas) with Ni, V naphthenates as well as antimony, aiming at simulating the levels found in PETROBRAS refineries, showed that under those conditions the antimony does not deposit significantly over the catalyst. Analysis of antimony content in the catalyst fines and decanted oil from one FCC unit confirms the non-retention of antimony under the applied industrial conditions. (author)

  14. Assessing the quality of energy supplied by small renewable energy systems; Avaliacao da qualidade da energia fornecida por sistemas renovaveis isolados de pequeno porte

    Energy Technology Data Exchange (ETDEWEB)

    Galhardo, Marcos Andre Barros; Pinho, Joao Tavares [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Grupo de Estudos e Desenvolvimento de Alternativas Energeticas], e-mail: galhardo@ufpa.br, E-mail: jtpinho@ufpa.br

    2004-07-01

    This paper makes an analysis of the power quality supplied by small renewable energy systems with energy storage in a battery bank and its DC/AC conversion by an inverter. It is shown that the power quality supplied by stand-alone renewable systems depends on the used inverter, specially of its voltage waveform, the load supplied and the voltage level in the battery bank, which has a direct influence on the value of the rms output voltage of the inverter. For these analysis, measurements are presented for typical loads used in these systems as illumination, TV, refrigerator, etc., and combinations of these loads, supplied by different waveforms. (author)

  15. Quality assessment of radiopharmaceuticals in nuclear medicine services at Northeast states, Brazil; Avaliacao da qualidade de radiofarmacos em servicos de medicina nuclear de estados da regiao nordeste

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Wellington Gomes de

    2012-07-01

    The radiopharmaceuticals are used in the field nuclear medicine services (NMS) as tracer in the diagnoses and treatment of many diseases. Radiopharmaceuticals used in nuclear medicine and usually have a minimum of pharmacological effect. The procedures for labelling Radiopharmaceuticals should be observed in order to minimize risks to patients, employees and individuals from the public, and to be administered in humans, must be sterile and free of pyrogens and possess elements all measures of quality controls required a conventional drug. The 'Agencia Nacional de Vigilancia Sanitaria (ANVISA)' in its 'Resolucao de Diretoria Colegiada' (RDC) No. 38 of June 4{sup th} 2008, decided that the NMS must perform quality control in the generators eluate and radiopharmaceuticals according to recommendations of manufacturers and scientific evidence accepted by ANVISA. Thus, this study proposes to evaluate the quality of the generator {sup 99M}o-{sup 99m}Tc eluate and radiopharmaceuticals labeled with {sup 99m}Tc used in most NMS of some states in the Northeast, in relation to radionuclide, chemical, radiochemical purity and pH and promote the inclusion of procedure for quality control of radiopharmaceuticals in routine NMS. The results show that 90% radionuclidic purity, 98.2% purity chemical and radiochemical purity of 46% and 100% of the eluates are in agreement with international pharmacopoeias; already radiopharmaceuticals showed 82.6% purity and all radiochemical pH values are also in accordance with international pharmacopoeias. Even with so many positive results, staff the majority of MNS was not able to perform the quality control of the eluates and radiopharmaceuticals. Showing the importance of implementing of quality control programs of the eluates and radiopharmaceuticals in nuclear medicine. (author)

  16. Evaluation of effective dose in consequence of Para chestnut ingestion; Avaliacao da dose efetiva em consequencia da ingestao de castanha do Para

    Energy Technology Data Exchange (ETDEWEB)

    Bellintani, Sandra A.; Oliveira, Joselens de; Carvalho, Jurandyr S. de; Hiromoto, Goro [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    1995-12-31

    Commercial samples of Brazil nut tree seed (Bertholletia excelsa) were analysed for the presence or uranium and thorium series of natural radionuclides. The samples were analysed for the content of {sup 238} U, {sup 226} Ra, {sup 210} Pb, {sup 232} Th, {sup 228} Th. Mean values 1.4 {+-} 0.4 Bq/kg for {sup 238} U, 26.3{+-}4.1 Bq/kG for {sup 226} Ra, 4.7{sup {+-}}1.8 Bq/kg for {sup 210} Pb, 16.5{+-}4.3 Bq/kg for {sup 232} Th, 31.3{+-}6.4 Bq/Kg for {sup 228} Ra and 12.3{+-}5.1 Bq/kg for {sup 228} Th. The effective dose due to the ingestion of natural radionuclides contained in the Brazil nuts, is 2.6 x 10{sup -2} mSv/kg ingested per year. (author). 9 refs., 1 tab.

  17. Evaluation of gels obtained from acetylation of chitosan in heterogeneous medium; Avaliacao de geis obtidos a partir da acetilacao da quitosana em meio heterogeneo

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, Rosangela Balaban; Silva, Dayse Luzia Pinheiro da; Costa, Marta [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Dept. de Quimica]. E-mail: balaban@digi.com.br; Raffin, Fernanda Nervo [Universidade Federal do Rio Grande do Norte (UFRGN), Natal, RN (Brazil). Centro de Ciencias da Saude. Dept. de Quimica, Tecnologia Farmaceutica e de Alimentos; Ruiz, Naira Machado da Silva [Centro de Pesquisa Leopoldo A. Miguez de Mello (CENPES), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Chitosan was acetylated during 2, 5 and 10 h and physical gels were obtained at different polymer concentrations in N,N-dimethylacetamide containing 5% of LiCl. Acetylation was confirmed by infrared spectroscopy and {sup 13}C NMR, and degrees of acetylation in the range of 0.82-0.91 were determined by NMR. The O-acetylation degree (0.12-0.15) was exclusively determined by a volumetric method. Rheological studies showed that the storage modulus values were smaller for the more acetylated samples and increased with the temperature and the polymer concentration. All the gels presented storage modulus superior to loss modulus, evidencing more elastic than viscous characteristics. The results obtained in this work suggest a gelation process based on a balance between O and N-acetylation and intermolecular bonds. (author)

  18. Residential gamma evaluation in the Brazilian northeast phosphate region; Avaliacao da exposicao gama em residencias da regiao fosfatica do nordeste do Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Ricardo de Andrade; Amaral, Romilton dos Santos [Pernambuco Univ., Recife, PE (Brazil). Dept. de Energia Nuclear; Carvalho, Ricardo Nunes de; Mazzilli, Barbara Paci [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    1999-11-01

    This study is part of a program that has been carried out by our research group aiming to determine the contents of natural radionuclides in the environment, especially the ones pertaining to the {sup 238} U series. The data collected will be useful in estimating the commitment dose to the population. The studies were located in the phosphate-rich area in the coastal region of the States of Pernambuco and Paraiba, Brazil. This work was undertaken with the purpose of determining the committed effective dose derived from external gamma radiation exclusively inside the houses. The results show effective doses ranged from 0.7 mSv/y to 1.15 mSv/y. (author) 8 refs., 1 tab.; e-mail: ral at npd.ufpe.br

  19. Estudo retrospectivo da doença de Creutzfeldt-Jakob diagnosticada no norte de Portugal entre 1993-2002: características demográficas, clínicas e neuropatológicas

    Directory of Open Access Journals (Sweden)

    Silva Ana Martins

    2003-01-01

    Full Text Available INTRODUÇÃO E OBJETIVO: Descrição das características demográficas, clinicas e neuropatológicas de 11 doentes com doença de Creutzfeldt-Jakob (DCJ. MÉTODO: Revisão clínica e neuropatológica de doentes com DCJ diagnosticados entre 1993 e 2002 em hospitais do Norte de Portugal. RESULTADOS: Foram identificados 11 doentes (4 do sexo feminino; idade média de início dos sintomas, 64 anos; média de duração da doença, 8 meses. Todos apresentaram síndrome demencial progressiva associada a mioclonias, sendo a síndrome cerebelar a forma de apresentação inicial em quatro deles. O estudo neuropatológico revelou sempre espongiose e gliose reativa associada a perda neuronal. O estudo imunocitoquímico para proteína priônica (PrP foi positivo nos oito casos em que foi executado. CONCLUSÃO: O grupo de doentes descritos constitui uma série clinica representativa da heterogeneidade de fenótipos possíveis da DCJ esporádica. O estudo neuropatológico é ainda indispensável para o diagnóstico definitivo da doença.

  20. Legionnaires' disease in the renal transplant unit of "Hospital das Clinicas, FMUSP": during a five year period (1988-1993 Doença dos legionários na Unidade de Transplante Renal (UTR do Hospital das Clínicas FMUSP, no período de 1988 a 1993

    Directory of Open Access Journals (Sweden)

    Neusa Augusta de Oliveira Mazieri

    1994-06-01

    Full Text Available Several reports have related Legionella pneumophila with pneumonia in renal transplant patients, however this association has not been systematically documented in Brazil. Therefore this paper reports the incidence, by serologycal assays, of Legionella pneumophila serogroup 1 in these patients during a five year period. For this purpose sera from blood samples of 70 hospitalized patients with pneumonia from the Renal Transplant Unit of Hospital das Clinicas, FMUSP collected at the acute and convalescent phase of infection were submitted to indirect immunofluorescence assay (IFA to demonstrate anti-Legionella pneumophila serogroup 1 antibodies. Of these 70 patients studied during the period of 1988 to 1993,18 (25.71 % had significant rises in specific antibody titers for Legionella pneumophila serogroup 1. Incidence was interrupted following Hospital water decontamination procedures, with recurrence of infections after treatment interruption. In this study, the high susceptibility (25.71% of immunodepressed renal transplant patients to Legionella pneumophila serogroup 1 nosocomial infections is documented. The importance of the implementation and maintenance of water decontamination measures for prophylaxis of the infection is also clearly evident.Embora vários trabalhos tem mostrado a presença de Legionella pneumophila associado a pneumopatias infecciosas em transplantados renais, tal associação não fora antes realizado de maneira sistemática no Brasil. Os autores julgaram oportuno a determinação da incidência por comprovação sorológica da Legionella pneumophila sorogrupo 1 em transplantados renais num período de 5 anos. Para tanto amostras de soros de 70 pacientes com pneumopatia infecciosa internados na UTR do HC-FMUSP, colhidos na fase aguda e convalescente da infecção, foram submetidas à reação de imunofluo-rescência indireta para pesquisa de anticorpos anti-Legionella pneumophila sorogrupo 1. Dos 70 pacientes

  1. Resistência de bactérias isoladas de cães e gatos no Hospital Veterinário da Universidade Estadual de Londrina (2008-2009)

    OpenAIRE

    Ishii,Juliana B.; Freitas,Julio C.; Mônica V.B. Arias

    2011-01-01

    Foi determinado o perfil de resistência de bactérias isoladas de diversas afecções em cães e gatos atendidos no Setor de Clinica Cirúrgica de Animais de Companhia do Hospital Veterinário da Universidade Estadual de Londrina. Houve maior frequência de Staphylococcus spp. (27,6%), seguido por Pseudomonas spp. (22,7%) e Escherichia coli (16,6%). Na prova de sensibilidade antimicrobiana pelo método de difusão em ágar houve alta porcentagem de resistência das bactérias isoladas aos principais anti...

  2. Estudo da frequência do fenótipo mutador para resistência aos antibióticos beta-lactâmicos em linhagens de E. coli patogênicas.

    OpenAIRE

    Débora dos Santos Costa

    2013-01-01

    Atualmente a alta incidência de isolados multirresistentes a antibióticos utilizados na clinica tem-se tornado alarmante. Estudos recentes demonstraram que um dos motivos que contribuem para o aumento da resistência a antibióticos em bactérias é a ocorrência de linhagens que apresentam o fenótipo mutador. Deficiências nos genes do complexo mut, que incluem os sistemas de reparo dependente de metilação (MMR do inglês methyl-directed mismatch repair), e o sistema de reparo oxidativo (GO) podem...

  3. [The preparation and characterization of fine dusts carried out in the Clinica del Lavoro di Milano in support of experimental studies].

    Science.gov (United States)

    Occella, E; Maddalon, G; Peruzzo, G F; Foà, V

    1999-01-01

    This paper aims to illustrate the conditions selected at the Clinica del Lavoro of the University of Milan to prepare and analyze a large number of fine dust samples produced over a period of about 50 years, that were initially used for studies within the Clinic performed in its own facilities, and since 1956 were sent to other Italian and overseas laboratories (Luxembourg, UK, Germany, Norway, Sweden, South Korea, USA). The total quantity of material distributed (with maximum size 7-10 microns) was about 2 kg and consisted of the following mineral and artificial compounds: quartz, HF-treated quartz, tridymite, HF-treated tridymite, cristobalite, chromite, anthracite, quartz sand for foundry moulds, sand from the Lybian desert, vitreous silica, pumice, cement, as well small quantities of metallic oxides, organic resins, chrysotile, crocidolite, fibres (vitreous, cotton and polyamidic). About half of the entire quantity of dusts produced consisted of partially HF-treated tridymite. Initially, research on the etiology of silicosis used quartz dust samples, simply sieved or ventilated (consisting of classes finer than 0.04 mm, containing a 15-20% respirable fraction). From 1956 to 1960 the dusts were produced by manual grinding in an agate mortar, below about 10 microns, starting from quartz from Quincinetto (near Ivrea, Province of Turin), containing about 99.5% quartz: particle size and composition were checked using an optical-petrographic technique, with identification of the free and total silica content. Subsequently, the dusts used for biological research were obtained by grinding coarse material with a cast iron pestle and planetary mills, agate and corundum jars. The grinding products were sized by means of centrifugal classification, using the selector developed by N. Zurlo, ensuring control of dust size both optically and by means of wet levigators and hydraulic classifiers (in cooperation with the Institute of Mines of Turin Polytechnic School). After 1990

  4. Problemas da sociologia da arte

    OpenAIRE

    Bastide, Roger

    2006-01-01

    A partir de um balanço das realizações consideradas pelo autor como as mais relevantes no campo da sociologia da arte até o final dos anos de 1940, o texto propõe novos rumos para a disciplina, considerando o modo como a arte é socialmente produzida como linguagem e valor.

  5. Teste respiratório da 13C-metacetina na doença hepática crônica pelo vírus C 13C-methacetin breath test in hepatitis C chronic liver disease

    OpenAIRE

    Ana Cláudia de Oliveira; Marialice Reber; Valéria Lanzoni; Maria Lúcia Ferraz; Edison Roberto Parise

    2006-01-01

    RACIONAL: O teste respiratório da metacetina marcada com carbono 13 (13C-metacetina) é método não-invasivo que permite examinar a função hepática microssomal, permitindo avaliação quantitativa da massa hepática funcional. OBJETIVO: Avaliar a utilidade clinica do teste respiratório da 13C-metacetina na avaliação de pacientes com doença crônica do fígado pelo vírus da hepatite C. CASUÍSTICA E MÉTODOS: Setenta e oito pacientes com hepatite crônica C e 13 indivíduos saudáveis pareados por sexo e ...

  6. Implantação do Programa Saúde na escola em Fortaleza-CE: atuação de equipe da Estratégia Saúde da Família

    Directory of Open Access Journals (Sweden)

    Lindelvania Matias de Santiago

    2012-12-01

    Full Text Available Este trabalho relata a experiência da implantação do Programa Saúde na Escola (PSE por uma equipe da Estratégia Saúde da Família (ESF em uma escola pública em Fortaleza-CE. As atividades desenvolvidas incluíram seminário de implantação do PSE com os docentes e integrantes da ESF, oficinas com os estudantes, avaliação clinica e odontológica dos adolescentes e entrega de Cadernetas de Saúde do Adolescente. A implantação do PSE permitiu aos profissionais de saúde a percepção do seu papel social de educador e possibilitou aos adolescentes maior contato com a equipe da ESF. A aproximação entre escola e ESF é fundamental para ajudar os adolescentes a transformarem a informação científica em comportamentos saudáveis.

  7. Clinical manifestations of peripheral nervous system involvement in human chronic chagas disease Manifestaciones clinicas de compromiso del sistema nervioso periférico en el estádio crônico de la enfermedad de Chagas

    Directory of Open Access Journals (Sweden)

    Osvaldo Genovese

    1996-06-01

    Full Text Available We conducted a clinical and electromyographical study in patients with Chagas' disease in the indeterminate or chronic stages of the illness. Altogether 841 patients were examined. Only 511 were admitted within the protocol; the remainder patients were rejected because they showed other causes able to damage the nervous system. Fifty two (10.17% out of the 511 patients showed signs and symptoms of peripheral nervous system involvement in the form of sensory impairment and diminished tendon jerks suggesting the presence of neuropathy. Forty five of them were submitted to a conventional electromyographical examination. Fifteen of mem showed normal results, while the remainder 30 disclosed a reduced interference pattern, being most of the remaining motor unit potentials fragmented or poliphasic, reduced sensory and motor conduction velocities and diminished amplitude of the sensory action potential. The findings suggest that some chagasic patients in the indeterminate or chronic stages of the disease may develop a clinical mild sensory-motor peripheral neuropathy.El estúdio presente fue diseftado con ei objeto de pesquizar Ia existência de manifestaciones clinicas en pacientes afectados por enfermedad de Chagas, en estádio indeterminado o crônico, que tuviesen, ai menos, 2 reacciones serologicas positivas. En total fueron examinados 841 enfermos. De ellos solo 511 fueron admitidos en ei protocolo; los restantes fueron rechazados por mostrar Ia presencia de otras causas que hubiesen podido danar su sistema nervioso. Dentro de los 511 pacientes admitidos, 52 (10.17% evidenciaron alteraciones objetivas y subjetivas de Ia sensibilidad y disminucion de los reflejos osteotendinosos. Estos signos y sintomas, que sugieren la presencia de neuropatia, podian combinarse de diferente manera. Como complemento dei examen clinico, se efectuo estúdio electromiografico convencional en 45 de estos pacientes. En 15 los hallazgos fueron normales, en tanto que en

  8. Fase aguda da esquistossomose mansoni

    Directory of Open Access Journals (Sweden)

    Edward Tonelli

    1972-10-01

    Full Text Available O A. faz um estudo panorâmico sobre a fase aguda da esquistossomose mansoni, abordando o quadro clínico e seu diagnóstico, os exames subsidiários, o diagnóstico diferencial, a terapêutica e os aspectos evolutivos. As manifestações clinicas dos períodos de incubação, de estado e de supressão são abordados. O diagnóstico da fase aguda é baseado em dado epidemiológico, 110 exame fisico e em exames subsidiários. O dado epidemiológico. em geral, é positivo, com menção a banho infectante, comumente 30 a 40 dias antes do início do quadro clínico e ao exame físico, encontramos hipertermia (38 - 4G°C, prostração, micropoliadenia hepatomegalia dolorosa em 95%, dos casos e esplenomegalia em 70% dos casos. Os exames prioritários para o diagnóstico são o exame parasiiológico de fezes seriado, que é positivo para ovos viáveis de S. mansoni e o leucograma seriado, que, geralmente, acusa leucocitose com eosinofilia. Em caso de dúvida ou para complementação diagnostica, podemos recorrer à endoscovia retal, ao oograma e á biópsia hepática. A endoscopia acusa, comumente, mucosa hiperêmica, edemaciada, friável, granulosa, com pontos hemorrágicos e o exame colhido por punção biópsia revela, entre outros achados, granulomas na fase necrótica-exsudativa. O diagnóstico diferencial deve ser feito com as seguintes entidades clínicas: gastroenterites. febre tifóide, disenteria bacilar, amebíase aguda, salmonelose septicêrnica prolongada, devendo, ainda, figurar a tuberculose miliar, abdome agudo, a G.N.D.A., a mononucleose infecciosa, a leptospirose, a hepatite e as poaneurites. A terapeutica é baseada nos cuidados gerais, na córticoterapia e na terapêutica específica. Observamos regressão dramática do quadro toxinfeccioso. nas primeiras 24 a 48 horas com a córticoterapia (prednisona que tem duração aproximada de 7 a 10 dias. A terapêutica específica (derivado nitrotiazolico = ambilhar e derivado hidroximet

  9. Gene real, gene imaginario: uma perspectiva fantas(mática da hereditariedade

    Directory of Open Access Journals (Sweden)

    Rubens Marcelo Volich

    Full Text Available A experiência clinica revela que, mesmo diante da doença orgânica, a referencia exclusiva à anatomia, à fisiologia ou mesmo à genética não é suficiente para compreendermos o sofrimento de nossos pacientes. Para alcançarmos a essência deste sofrimento, é necessário que consideremos que, a partir do corpo real, anatómico, fisiológico, configurase um outro corpo, um corpo imaginário, que se constitui, a partir do desamparo primordial, através da relação com um outro ser humano. Segundo esse processo, a criança constitui sua subjetividade, tornando-se um ser desejante, social, da cultura. A dissociação entre corpo anatómico e fisiológico e o corpo imaginário instaura uma fissura através da qual se esvai a subjetividade, preparando o caminho para a experiência melancólica. Essa perspectiva revela que o adoecer comporta uma dimensão identificatória e intersubjetiva. A doença de um indivíduo repercute, obrigatoriamente, no conjunto familiar através da genealogização do sintoma e do remanejamento das representações transgeracionais. Desta forma, é importante considerarmos essas experiências para compreendermos que o risco genético real, revelado pela ciência, é permeado pela vivência de um risco imaginário que determina as representações individuais e sociais da doença, e mesmo, em alguns casos, as possibilidades de sua manifestação bem como seu curso

  10. Use of clinical practice as a motivating tool of radioprotection teaching and radiopharmacology in early semesters of pharmacy course; Uso da pratica clinica como ferramenta motivadora de ensino de radioprotecao e radiofarmacologia em semestres iniciais em cursos de farmacia

    Energy Technology Data Exchange (ETDEWEB)

    Andrighetto, Daniela; Lüdke, Everton, E-mail: daniela.andrighetto@hotmail.com, E-mail: evertonludke@gmail.com [Universidade Federal de Santa Maria (CCNE/DEFIS/UFSM), RS (Brazil). Departamento de Fisica

    2014-07-01

    The research teaching methods aimed at the success of the higher education student in pharmacology and medicine courses in technical expertise in the fields of radiological protection, radiopharmacology and interventional radiology is extremely important in view of the progress of these sectors. The objective of this work is to propose a methodological sequence of teaching work with first-year students of pharmacy and medicine courses within a biophysical discipline where the integrated knowledge to clinical practice can be used for this purpose. The methodology was to assess individual learning of a group of N = 49 students of the first half in the age group of 17-19 years through conceptual acquisition by the traditional method of 'blackboard and chalk' and developed method that includes four pedagogical moments focused on the area health. An analysis of the evaluation student performance through Variance Analysis of a pathway showed improved scores with respect to the performance of application issues of knowledge concerning radiation protection and biological mechanisms of radiation with respect to the method of 'blackboard and chalk' with p < 0.05. Therefore, work with students with respect to the content in the form of six steps of clinical interest are a promising technique for radiation protection education in the early grades of college courses with experimental effectiveness.

  11. Analysis of the systems for management of radioactive wastes from nuclear medicine clinics of the city of Recife, Pernambuco, Brazil; Analise dos sistemas de gerenciamento de rejeitos radioativos de clinicas de medicina nuclear da cidade de Recife, PE

    Energy Technology Data Exchange (ETDEWEB)

    Lira, Renata Farias de; Lopes, Ferdinand de Jesus; Passos, Robson Silva; Silva, Valeria Cosma Bento da; Belo, Igor Burgo, E-mail: renatafariasdelira@hotmail.co, E-mail: ferdinand.lopes@oi.com.b, E-mail: robson.passos@hotmail.co, E-mail: Valleria_@hotmail.co, E-mail: Igor.burgo@gmail.co [Instituto Federal de Educacao, Ciencia e Tecnologia de Pernambuco, Recife, PE (Brazil); Santos, Marcus Aurelio Pereira dos, E-mail: masantos@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2009-07-01

    In nuclear medicine compounds marked with radionuclides, called radiopharmaceuticals, for obtention diagnostic information and for diseases treatment. The physicochemical characteristics of the radiopharmaceuticals determine his fixation at target-organ, and the physical characteristics determine the compound application in diagnostic or therapy. The handling of radiopharmaceuticals generates solid, liquid and gas wastes. The presence of these wastes implies in a adequate management according to regulation standards established by the Brazilian Nuclear Energy Commission (CNEN). The objective of safe management of radioactive wastes is to protect the human being and the preservation of the environment, limiting possible radiological impacts for the future generation, and comprehend a set of technical and administrative activities involved in the collection, segregation, handling, conditioning, transportation, storage, control and elimination, or the final deposition. This work intends to verify if the radioactive waste management systems from the nuclear medicine clinics at the city of Recife are conformal with te normative regulations issued by the CNEN. The initial obtained results are used to elaboration of conformal verification spreadsheet and its application in six nuclear medicine clinics at Recife

  12. Evaluation of poly(vinylpyrrolidone) and collagen by Low Field Nuclear Magnetic Resonance Spectroscopy; Avaliacao da polivinilpirrolidona e do colageno por ressonancia magnetica nuclear de baixo campo

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Paula de M.; Tavares, Maria I.B. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Macromoleculas Professora Eloisa Mano]. E-mail: pmcosta@ima.ufrj.br

    2005-07-01

    Blends of natural and synthetic polymers represent a new class of materials with better mechanical properties and biocompatibility than those of the single components. Collagen and poly(vinylpyrrolidone) are well known for their important biological properties. The blending of collagen with poly(vinylpyrrolidone) makes it possible to obtain new materials in which strong interactions between the synthetic and biological components occur. Do to the excellent biocompatibility of these polymers, this blend has been much studied intending biomedical applications. And a one technique that can provide important information on molecular mobility, compatibility and even evaluate the interactions that can occur with these polymers is the Low Field Nuclear Magnetic Resonance Spectroscopy. Thus, the purpose of this work is to evaluate collagen and poly(vinylpyrrolidone) by Low Field Nuclear Magnetic Resonance Spectroscopy. From the values of relaxation times obtained, we can conclude that these materials have different interactions, and different mobility domains, confirming the heterogeneity and complexity of these materials. (author)

  13. Biodegradation evaluation of recycled polyethylene doped with Moringa oleifera oil; Avaliacao da biodegradacao de filmes de polietileno reciclado dopados com oleo de Moringa oleifera

    Energy Technology Data Exchange (ETDEWEB)

    Bicalho, Luciana A.; Novack, Katia M.; Melo, Tania M.S., E-mail: knovack@iceb.ufop.br [Dept. de Quimica (DEQUI) - Universidade Federal de Ouro Preto (UFOP), Ouro Preto, MG (Brazil)

    2011-07-01

    Chemical modifications and use of additives are some of the mainly ways to obtain polymer materials with especial properties. Vegetable oils incorporated to polymers preserve their structure while make possible a reduction of degradation rate. This work proposed the use of polyethylene, one of the most common polymer commodities, because of its low cost and wide application. In this project it was verified the possibility of making polymer materials with properties of a natural product through the incorporation of Moringa oleifera oil to recycled low density polyethylene (LDPEr) in different proportions. The films were buried for different times and their degradation was evaluated.) Samples were characterized by DSC, TGA and XRD. It was observed that samples doped with Moringa oil showed lower degradation time. (author)

  14. Evaluation of the strengthening of the conditions of voltage security using sensitivity analysis; Avaliacao do reforco das condicoes da seguranca de tensao utilizando a analise de sensibilidade

    Energy Technology Data Exchange (ETDEWEB)

    Rosa, A.L.S.; Costa, V.M. da; Peres, W. [Universidade Federal de Juiz de Fora (UFJF), MG (Brazil). Faculdade de Engenharia], Emails: arleilucas@gmail.com, vander@lacee.ufjf.br, wesley.peres@yahoo.com.br; Prada, R.B. [Pontificia Universidade Catolica (PUC-Rio), Rio de Janeiro, RJ (Brazil). Dept. de Engenharia Eletrica], Email: prada@ele.puc-rio.br

    2009-07-01

    Voltage stability or voltage security analysis has motivated an expressive attention of power systems researchers. In this work, a simple and fast method evaluates voltage security and proposes conditions to improve the loading margin. System analysis is carried out in terms of active power transmission path. Sensitivity analysis provides the most adequate buses to active and reactive power redispatch. A sequential iterative methodology to reinforce system conditions is presented. (author)

  15. Characterization and evaluation of residue 'grits' of the cellulose industry; Caracterizacao e avaliacao do resisduo 'grits' da industria de celulose

    Energy Technology Data Exchange (ETDEWEB)

    Destefani, A.Z.; Santos, M.M.; Holanda, J.N.F. [Universidade Estadual do Norte Fluminense Darcy Ribeiro (LAMAV/CCT/UENF), Campos dos Goytacazes, RJ (Brazil). Lab. de Materiais Avancados

    2010-07-01

    The cellulose industry generates huge amounts of solid waste residue called 'grits'. These wastes have been willing over time in landfills near the mills. However, this type of disposal is not environmentally friendly and can cause degradation and environmental pollution. In addition, environmental legislation increasingly severe and the high costs of landfill have led the search for new alternatives for final disposition of this abundant waste. In this context, this study is to characterize waste grits, generated by the cellulose industry in the region of Aracruz-ES. The residue samples were characterized in terms of chemical composition, X-ray diffraction, particle size distribution and thermal analysis (DTA and TGA). The characterization of the residual 'grits' demonstrated its potential as a feedstock for production of soil-cement bricks. (author)

  16. Evaluation of knee meniscus lesions using MRI - a comparative study of pulse sequences; Avaliacao da lesao meniscal por meio de ressonancia magnetica do joelho - estudo comparativo das sequencias

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Artur da Rocha C.; Vilela, Sonia de Aguiar; Turrini, Elisabeth; Lederman, Henrique M. [Universidade Federal de Sao Paulo (UNIFESP), SP (Brazil). Escola Paulista de Medicina. Dept. de Diagnostico por Imagem

    1997-05-01

    The frequency of knee disability after injuries has become higher, in this context meniscal lesions keep an important role. This study evaluated 34 MR exams using 1.5-T system (Signa; GE). In this group 26 had 4 sequences (5 acquisitions); 2 coronal (T1, MPGR), 3 sagittal (T1, T2, proton density). The aim of this study was to evaluate the MR pulse sequence`s reproducibility and observer variability. Two readers (A and B) reviewed the exams using the same criteria. The reader A reviewed all sequences for each patient; the reader B reviewed the individual sequences at random on two separate occasions, 6 months apart. The signal expression of meniscal lesion is more evident with T1 (short TR/short TE) sagittal; however, in this sequence the results were less consistent. The sagittal proton density (long TR/short TE) was very close to be the idea sequence: had good concordance among the readings of readers A and B. Kappa concordance test showed best result for sagittal proton density images (Kw = 0.84). (author) 47 refs., 17 figs., 2 tabs.

  17. Phytochemical study and evaluation of anti-inflammatory activity of Aeschynomene fluminensis Vell. (Fabaceae); Estudo fitoquimico e avaliacao da atividade anti-inflamatoria de Aeschynomene fluminensis Vell. (Fabaceae)

    Energy Technology Data Exchange (ETDEWEB)

    Ignoato, Marlene Capelin; Fabrao, Rodrigo Monteiro; Schuquel, Ivania Teresinha Albrecht; Botelho, Marcos Felipe Pinatto; Santin, Silvana Maria de Oliveira [Universidade Estadual de Maringa (UEM) PR (Brazil). Dept. de Quimica; Arruda, Laura Licia Milani de; Bersani-Amado, Ciomar Aparecida [Universidade Estadual de Maringa (UEM) PR (Brazil). Dept. de Farmacologia e Terapeutica; Souza, Maria Conceicao de, E-mail: smoliveira@uem.br [Universidade Estadual de Maringa (UEM) PR (Brazil). Dept. de Biologia

    2012-07-01

    Phytochemical investigation of Aeschynomene fluminensis leaves and branches led to isolation of the flavonoid glycosides kaempferol 3,7-di-O-{alpha}-L-rhamnopyranoside, kaempferol 7-O-{alpha}-L-rhamnopyranoside, kaempferol 3-O-apiofuranosil-7-O- rhamnopyranoside, quercetin 3-O-{alpha}-L-rhamnopyranoside, quercetin 3-O-arabinofuranoside, 8-{beta}-D-glucopyranosyl 4',5,7-trihydroxyflavanone, the isoflavonoid 4',7-di-hydroxy-isoflavone, the dimer epicatechin-(2{beta} ->7, 4{beta} ->8)- epicatechin, the polyol 3-O-methyl-chiro-inositol and two steroids in sitosterol and stigmasterol mixture. These compounds were identified by NMR {sup 1}H and {sup 13}C and compared with literature data. Anti-inflammatory activity of the crude methanolic extract and its fractions was evaluated (author)

  18. Evaluation of personal dosimetry in abdominal aorta endo prosthesis procedures; Avaliacao da dosimetria pessoal em procedimentos de endoproteses de aorta abdominal

    Energy Technology Data Exchange (ETDEWEB)

    Bacchim Neto, Fernando A.; Alves, Allan F.F.; Freitas, Carlos C.M. de; Pina, Diana R. [Universidade Estadual Paulista Julio de Mesquita Filho (FMB/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina

    2016-07-01

    The objective of this paper is to evaluate the currently dosimetry technique employed in the medical staff during interventional radiology procedures. Thermoluminescent dosimeters were positioned in different regions of the primary interventionist during procedures of stent graft in abdominal aortic aneurysms. The equivalent dose rate profile shows a tendency of difference between dose rate found in the chest in relation to the abdomen, hands and feet. Statistically, dose rates found in the hands differ from those found in the chest with p=0.05. These results suggest that only a dosimeter placed on the chest does not describe faithfully the radiation doses to which these professionals are occupationally exposed. (author)

  19. Importance of critical evaluation in quality control of scintillation cameras;Importancia da avaliacao criteriosa no controle de qualidade de camaras de cintilacao

    Energy Technology Data Exchange (ETDEWEB)

    Menezes, V.O.; Machado, M.A.D.; Sampaio, L.J.L.; Silva, D.C. [Hospital Sao Rafael, Salvador, BR (Brazil)

    2009-07-01

    The evaluation of quality control results in nuclear medicine must be performed with a critical view over the conditions the tests are executed. This paper is a result of observations in the routine quality control where we set up didactic 'findings' to show the importance of evaluating critical situations while executing the procedures. (author)

  20. Assessment and epidemiology of Chagas' disease in patients treated in Araguaina - Tocantins; Avaliacao e epidemiologia da cardiopatia chagasica em pacientes atendidos em Araguaina - Tocantins

    Energy Technology Data Exchange (ETDEWEB)

    Correa, Valeria Rita

    2010-07-01

    Chagas disease (AD) was described by Carlos Chagas in 1909. It is caused by a parasite T. cruzi, transmitted by bugs, by blood transfusion, vertical and orally. The DC has two phases: acute and chronic. The evolution to the cardiac form occurs in about 30% of chronic cases and is the largest cause of mortality in chronic Chagas disease. The aim of this study was to Chagas' disease in patients of Tocantins, compared with other heart patients and asymptomatic from the standpoint of non-invasive exams using radiant energies such as echocardiography and ECG and RX. The descriptive study included 80 patients, 20 chronic form of Chagas disease, 20 indeterminate, 20 with other heart diseases, and 20 controls. There was a prevalence of 9.5% of chagasic patients treated in outpatient cardiology at Araguaina Tocantins, and 7.3% in chronic and 2.21% in the indeterminate. Of the chronic patients in the study 50% had mega esophagus and megacolon 4 (20%). Most patients had no family history of AD, nor was a smoker or drinker. Major electrocardiographic abnormalities found refer to driving. The evaluation of ICT, the chronic chagasic showed that increased by 40% of patients, 40% had esophageal changes and 20% of patients had megacolon s. The echocardiogram was abnormal in 42%). 27% of patients had EF below 55% changed. Changes in segmental contractility and Asynchrony septum were found in 80% of chronic Chagas disease. In 80% of the patients was observed diastolic dysfunction. The valvular changes occurred in 75%. Electrocardiographic abnormalities occurred in 80% of patients with CCC, while the other heart had ECG changes. Arterial hypertension had an incidence of 45% in patients with CCC and 40% in FCI. The systolic and diastolic ventricular dysfunction was more prevalent in groups that had an abnormal ECG and arrhythmia. Observed that the group of chagasic decreased ejection fraction is correlated to a higher incidence of arrhythmias besides diastolic dysfunction and related increased atrio-left, ICT correlates with LV size and EF and LA. The abnormal ECG also are related to the dysfunction. (author)

  1. Evaluation of radon measuring technique using passive detector activated carbon; Avaliacao da tecnica de medicao do radonio utilizando detector passivo com carvao ativado

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Paulo Roberto Rocha; Lessa, Edmilson de Lima; Oliveira, Evaldo Paulo de, E-mail: epoliveira@aluno.ird.gov.br [Instituto de Radioprotecao e Dosimetria, (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Div. de Radioprotecao Ambiental e Ocupacional

    2014-07-01

    This study aims to evaluate the efficiency of measuring the radioactive gas Radon ({sup 222} Rn) with passive detector activated carbon. Alpha Guard, exposure chamber, air sampler, default font Radio, calibrator flow, flow adjuster, ducts drivers: For this, various equipment to make the measurement system as were used. An assembly of such equipment, with specific sequence was used allowing for more efficient exposure of passive detectors Radon gas. Twenty samples were heated to remove moisture and then stored in desiccator until the experiment were made. The exhibition was held passive dosimeters being removed from the chamber, and one hour after, subjected to analysis by gamma spectrometry in germanium (HPGe) for an hour. Subsequently, other measurements were made at scheduled times and sequential for one hour. The results were presented in report form and spectra, measures and graphs generated by Alpha Guard were also extracted. Finally we calculated the efficiency of the passive meter activated carbon. (author)

  2. Kerma rate evaluation in the air in a room interventional cardiology; Avaliacao da taxa de Kerma no ar em uma sala de cardiologia intervencionista

    Energy Technology Data Exchange (ETDEWEB)

    Real, Jessica V.; Luz, Renata M. da, E-mail: jessica.real@pucrs.br, E-mail: renata.luz@pucrs.br [Hospital Sao Lucas (HSL/PUCRS), Porto Alegre, RS (Brazil); Fröhlich, Bruna D.; Silva, Ana Maria Marques da, E-mail: bruna.frohlich@acad.pucrs.br, E-mail: ana.marques@pucrs.br [Pontificia Universidade Catolica do Rio Grande do Sul (PUCRS), Porto Alegre, RS (Brazil)

    2014-07-01

    In recent years, the number of interventional cardiology procedures is increasing. However, due to the long time of fluoroscopy in these procedures, care teams can receive high doses of radiation. The radiation scattered by the patient is not uniform, and their assessment is of utmost importance. This study aimed to estimate and map the kerma rate in the air at the time of the gonads, in an interventional cardiology room, seeking to optimize the dose absorbed by individuals occupationally exposed to ionizing radiation. For data collection, the room was divided into quadrants of 1m{sup 2}, totaling 40 collection points. The simulator was positioned so that its entry surface was located in the interventional reference point. Were chosen the conditions that simulate angiography and angioplasty procedures performed in the service. The data were obtained for height of 1 meter, gonad region. The results obtained for kerma rates in air, in quadrants, show that higher measured values was in the vicinity of the X-ray tube. Has been found that the medical staff are more exposed, because of its location during the procedure, around the table. The law of the inverse square distance of the farthest points of the X-ray tube were verified.

  3. Evaluation of patients skin dose undergoing interventional cardiology procedure using radiochromic films; Avaliacao da dose na pele de pacientes submetidos a procedimentos de cardiologia intervencionista usando filmes radiocromicos

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Mauro W. Oliveira da; Canevaro, Lucia V. [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Servico de Fisica Medica; Rodrigues, Barbara B. Dias [Universidade Federal do Rio de Janeiro (PEN/COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Programa de Engenharia Nuclear

    2011-07-01

    In interventional cardiology (IC), coronary angiography (CA) and percutaneous transluminal coronary angioplasty (PTCA) procedures are the most frequent ones. Since the 1990s, the number of IC procedures has increased rapidly. It is also known that these procedures are associated with high radiation doses due to long fluoroscopy time (FT) and large number of cine-frames (CF) acquired to document the procedure. Mapping skin doses in IC is useful to find the probability of skin injuries, to detect areas of overlapping field, and to get a permanent record of the most exposed areas of skin. The purpose of this study was to estimate the maximum skin dose (MSD) in patients undergoing CA and PTCA, and to compare these values with the reference levels proposed in the literature. Patients' dose measurements were carried out on a sample of 38 patients at the hemodynamic department, in four local hospitals in Rio de Janeiro, Brazil, using Gafchromic XR-RV2 films. In PTCA procedures, the median and third quartile values of MSD were estimated at 2.5 and 5.3 Gy, respectively. For the CA procedures, the median and third quartile values of MSD were estimated at 0.5 and 0.7 Gy, respectively. In this paper, we used the Pearson's correlation coefficient (r), and we found a fairly strong correlation between FT and MSD (r=0.8334, p<0.0001), for CA procedures. The 1 Gy threshold for deterministic effects was exceeded in nine patients. The use of Gafchromic XR-RV2 films was shown to be an effective method to measure MSD and the dose distribution map. The method is effective to identify the distribution of radiation fields, thus allowing the follow-up of the patient to investigate the appearance of skin injuries. (author)

  4. Glass forming ability of the Al-Ce-Ni system; Avaliacao da capacidade de formacao vitrea do sistema Al-Ce-Ni

    Energy Technology Data Exchange (ETDEWEB)

    Triveno Rios, C. [Engenharia Mecanica, Universidade Federal de Mato Grosso, Rondonopolis, MT (Brazil)], e-mail: triveno@ufmt.br; Surinach, S.; Baro, M.D. [Departamento de Engenharia de Materiais - Universidade Federal de Sao Carlos, SP (Brazil); Bolfarini, C.; Botta, W.J.; Kiminami, C.S. [Departamento de Fisica da Universidade Autonoma de Barcelona, Bellaterra (Spain)

    2010-07-01

    In the present work, the glass forming ability (GFA) and its compositional dependence on Al-Ni-Ce system alloys were investigated in function of several thermal parameters. Rapidly quenched Al{sub 85}Ni{sub 15}-{sub X}Ce{sub X} (X=4,5,6,7,10), Al{sub 90}Ni{sub 5}Ce{sub 5}, Al{sub 89}Ni{sub 2}.{sub 4}Ce{sub 8}.{sub 6}, Al{sub 80}Ni{sub 15.6}Ce{sub 4}.{sub 4} and Al{sub 78}Ni{sub 18.5}Ce{sub 3.5} amorphous ribbons were produced by melt-spinning and the structural transformation during heating was studied using a combination of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The results showed that the GFA and the thermal stability in the Al-rich corner of Al- Ni-Ce system alloys were enhanced by increasing the solute content and specifically the Ce content (author)

  5. Optimization of the operational conditions and analysis of the metallurgical performance of the ladle furnace; Otimizacao dos parametros operacionais e avaliacao da performance metalurgica do forno panela

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Aldo H.A.; Vianna, Jose F.; Rios, Geraldo L.C. [USIMINAS, Ipatinga, MG (Brazil). Centro de Pesquisas

    1990-12-31

    The operational results have shown that the ladle furnace has the capability to increase the steel quality decrease the tapping temperature, to adjust the operational pattern of the BOF Shop and to produce ultra low sulfur steel. (author). 4 refs., 3 tabs., 4 figs.

  6. Bacteriological evaluation of fresh chicken sausage submitted to gamma radiation; Avaliacao bacteriologica da linguica de frango Frescal submetida a radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Borges, Alexandre

    2002-07-01

    Many developed countries have established a goal of self-sufficiency in food production, while many other obtain their principal foreign exchange through food exports. For these reasons, it is essential to eliminate losses in food products. It is no less important to prevent or combat food-transmitted diseases, principally across poultry and poultry derivatives, which play a major role in certain infections and is the focus of national public health goals in order to increase the international commerce. In tropical countries, perishable products represent the largest markets. The population lives in a constant battle against the deterioration of these foods. Such loss is enormous where the climate favors the proliferation of agents of decomposition and acceleration of putrification. Increasing the useful life of these perishable products will provide producers the option of commercializing them in low harvest season, thus achieving higher prices, and providing sensible growth to the agro-industrial market. Treatment of perishables with gamma radiation presently constitutes one of the most modern, safe, and efficient methods for increasing food preservation. The irradiation of foods can offer various special advantages such as: kill or sterilize pathogenic organisms in food, improving their quality and duration, reducing the level of toxics, slow or stop the aging of roots and tubers, disinfect products of animal and vegetable origin thus slowing their decomposition, increasing their shelf-life, and prolonging their conservation refrigeration. The practice of irradiating foods for the treatment of microorganisms has begun to gain momentum in Brazil, where roughly 25% of all food produced annually is lost to disease and insects activity, increased by lack of adequate storage treatments. Various countries have already adopted the method that, when practiced properly by qualified professionals, does not cause side effects other than the extension of useful life. In light of the lack of present data on the irradiation of fresh chicken sausage, the objective of this study is to evaluate determine the efficiency of this method as a process for reducing the microbial load via measurement of the bacteriology of the product before and after gamma radiation. 45 sample of chicken sausage(acquired directly from the poultry industry) were prepared divided in 3 treatments: the first is a control, the second and third using application of 1,5 and 3,0 kGy, respectively. The chicken sausages irradiated with a dose of 1,5 kGy did not have, statistically significant results apparent in the bacteriological measures. Samples irradiated with 3,0 kGy did experience statistically significant reductions. It is concluded that the irradiating the product with a dose of 3,0 kGy is more effective for the reduction of bacterial population, with the data in these trials indicating a 95,3% reduction in total coliforms, 100% removal of fecal coliforms, and 84,0% reduction of mesophiles, relative to the control samples. (author)

  7. Economic evaluation of the industrial induction electric motors utilization of high performance; Avaliacao economica da utilizacao de motores eletricos industriais de inducao de alto rendimento

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Goeorge A. [CEPEL, Rio de Janeiro, RJ (Brazil); Herszterg, I. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Escola de Engenharia; Arouca, Mauricio C. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia

    1996-12-31

    The current work makes a cost-benefit analysis of the agents` view point involved, that is, the consumer and the electric utilities. In relation to the final consumer the energy economic potential calculus due to high performance motor application was taken into consideration in three different situations: in new installations, as an alternative the damaged motor recoil and substituting motors that are operating normally. The electricity rates show a strong influence in the financial-economic evaluation as much from the consumer view point as the electric utilities. The return internal rate criteria and payback period have been used, therefore the last one not so much recommended for not portraying the real investment rentability. 6 refs., 7 figs., 1 tab

  8. Evaluation of homogeneity and dose conformity in IMRT planning in prostate radiotherapy; Avaliacao da homogeneidade e conformidade de dose em planejamentos de IMRT de prostata em radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Juliane S.; Leidens, Matheus; Estacio, Daniela R., E-mail: juliane.lopes@pucrs.br [Hospital Sao Lucas (PUC-RS), Porto Alegre, RS (Brazil). Servico de Radioterapia; Razera, Ricardo A.Z.; Streck, Elaine E.; Silva, Ana M.M. da [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil). Faculdade de Fisica

    2015-12-15

    The goal of this study was to evaluate the dose distribution homogeneity and conformity of radiation therapy plans of prostate cancer using IMRT. Data from 34 treatment plans of Hospital Sao Lucas of PUCRS, where those plans were executed, were retrospectively analyzed. All of them were done with 6MV X-rays from a linear accelerator CLINAC IX, and the prescription doses varied between 60 and 74 Gy. Analyses showing the homogeneity and conformity indices for the dose distribution of those plans were made. During these analyses, some comparisons with the traditional radiation therapy planning technic, the 3D-CRT, were discussed. The results showed that there is no correlation between the prescribed dose and the homogeneity and conformity indices, indicating that IMRT works very well even for higher doses. Furthermore, a comparison between the results obtained and the recommendations of ICRU 83 was carried out. It has also been observed that the indices were really close to the ideal values. 82.4% of the cases showed a difference below 5% of the ideal value for the index of conformity, and 88.2% showed a difference below 10% for the homogeneity index. Concluding, it is possible to confirm the quality of the analyzed radiation therapy plans of prostate cancer using IMRT. (author)

  9. Synthesis optimization of calcium aluminate cement phases for biomedical applications; Avaliacao da sintese das fases de cimento de aluminato de calcio

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, T.L.; Santos, G.L.; Oliveira, I.R. [Universidade do Vale do Paraiba (UNIVAP), Sao Jose dos Campos, SP (Brazil); Pandolfelli, V.C. [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil)

    2011-07-01

    Calcium aluminate cement (CAC) has been studied as a potential material for applications in the areas of health such as, endodontics and bone reconstruction. These studies have been based on commercial products consisting of a mixture of phases. Improvements can be attained by investigating the synthesis routes of CAC aiming the proper balance between the phases and the control of impurities that may impair its performance for biomedical applications. Thus, the aim of this work was to study the CAC synthesis routes in the Al{sub 2}O{sub 3}-CaCO{sub 3} and Al{sub 2}O{sub 3}-CaO systems, as well as the phase characterization attained by means of X ray analysis. The Al{sub 2}O{sub 3}-CaO route enabled the production of the target phases (CA, CA{sub 2}, C{sub 3}A and C{sub 12}A{sub 7}) with a higher purity compared to the Al2O3-CaCO3 one. As a result the particular properties of these phases can be evaluated to define a more suitable composition that results in better properties for an endodontic cement and other applications. (author)

  10. Evaluation of radiosensitivity hemocytes of Biomphalaria glabrata exposed to gamma radiation; Avaliacao da radiossensibilidade de hemocitos de Biomphalaria glabrata expostos a radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Silva, L.R.S.; Amaral, A.J., E-mail: luannaribeiro_lua@hotmail.com [Universidade Federal de Pernambuco (UFPE), Recife-PE (Brazil). Dept. de Energia Nuclear; Silva, E.B. [Universidade Federal de Pernambuco (UFPE), Vitoria de Santo Antao, PE (Brazil). Centro Academico de Vitoria; Amancio, F.F.; Melo, A.M.M.A. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Biofisica e Radiobiologia

    2013-06-15

    The mollusc Biomphalaria glabrata have characteristics that allow them to be identified as an animal model ideal for monitoring areas exposed to chemical agents and physical. This study evaluated the effect of ionizing radiation from Cobalt-60 in haemocytes present in the hemolymph of Biomphalaria glabrata, with the goal of using these cells as indicators of the presence of radiation in aquatic environments. The mollusks were divided into five groups: one control and four subjected doses of 25, 35, 45 and 55 Gy of gamma radiation. After 48 hours of irradiation, the clam hemolymph was collected and slides were prepared and stained with Giemsa for analyses under a light microscope. Statistical analysis was performed using ANOVA and Tukey's test, p <0.05. The results showed that the total number of cells after irradiation reduced compared to control except at a dose of 55 Gy. During data analysis, morphological changes were observed in haemocytes of mollusks subjected to doses of 35, 45 and 55 Gy. These modifications consisted of nucleus bilobulated and nucleo plasmatic bridges. Another change was exclusively observed in the cellular exposure of 55 Gy, where hemocytes showed misshapen nuclei and cytoplasm vacuolisation, suggestive of apoptosis. It is concluded that hemocytes are sensitive to radiation and can be used as indicators of the presence of high doses of ionizing radiation in aquatic environments. (author)

  11. Evaluation of dosimetry and image quality of computerized tomography abdomen protocols; Avaliacao de dose e qualidade da imagem em protocolos de abdomen em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Maues, Nadine H.P.B.; Alves, Allan F.F.; Bacchim Neto, Fernando A.; Pina, Diana R. [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil)

    2016-07-01

    In this study, we evaluate the dosimetry and image quality of computed tomography multislice abdomen protocols for different tube current modulation techniques (ATCM). We used the 16-slice Toshiba Activion CT scanner with the 'SureExposure3D' ATCM system. Thermoluminescent dosimeters were placed inside the anthropomorphic phantom Alderson-Rando for dosimetric assessments. An analytical phantom was used for the objective evaluation of image quality. It is observed that the higher standard deviation technique (SD) has the lowest value of effective dose. The use of different tube current modulation techniques showed significant reduction of radiation doses for the abdomen exams in computed tomography. The ATCM protocols can be an excellent alternative to dose reduction in CT scans, since it does not impair the diagnostic image quality. (author)

  12. Evaluation of impact strength of polyamide 6/bentonite clay nanocomposites; Avaliacao da resistencia mecanica sob impacto de nanocompositos de poliamida 6/argila bentonitica

    Energy Technology Data Exchange (ETDEWEB)

    Paz, Rene A.; Leite, Amanda M.D.; Medeirosa, Vanessa da N., E-mail: rene@cct.ufcg.edu.b [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Curso de Pos-Graduacao em Ciencia e Engenharia de Materiais; Araujo, Edcleide M.; Melo, Tomas J.A. [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Dept. de Engenharia de Materiais; Pessan, Luiz A. [Universidade Federal de Sao Carlos (DEMa/UFSCAR), SP (Brazil). Dept. de Engenharia de Materiais

    2010-07-01

    Nanocomposites of polymer/clay have had much attention in recent years, particularly those developed with layered silicates due to the need of engineering materials more efficient than pure polymers for certain applications. The level of exfoliation of layered silicates in crystalline structure of polymer matrices has been studied and has been observed that they affect the crystalline behavior and the physical and mechanical properties. In this study, nanocomposites of polyamide 6 were obtained by the melt intercalation method, using a regional bentonite modified with a quaternary ammonium salt in an amount of 3% by weight. XRD results showed that incorporation of salt among the layers of clay, making it organophilic and obtaining exfoliated and/or partially exfoliated structures. The impact properties of the nanocomposites showed inferior in relation to pure polyamide, in other words, lost of toughness. (author)

  13. Synthesis and preliminary evaluation of N-acylhydrazone compounds as antibacterial and antifungal agents; Sintese e avaliacao preliminar da atividade antibacteriana e antifungica de derivados N-acilidrazonicos

    Energy Technology Data Exchange (ETDEWEB)

    Cachiba, Thomas Haruo; Carvalho, Bruno Demartini; Carvalho, Diogo Teixeira [Universidade Federal de Alfenas, MG (Brazil). Fac. de Ciencias Farmaceuticas. Dept. de Alimentos e Medicamentos; Cusinato, Marina; Prado, Clara Gaviao; Dias, Amanda Latercia Tranches, E-mail: diogo.carvalho@unifal-mg.edu.br [Universidade Federal de Alfenas, MG (Brazil). Inst. de Ciencias Biomedicas

    2012-07-01

    We describe the synthesis and evaluation of N-acylhydrazone compounds bearing different electron-donating groups in one of its aromatic rings, obtained using a four-step synthetic route. IC{sub 50} values against pathogenic fungi and bacteria were determined by serial microdilution. Compounds showed low activity against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. By contrast, a derivative with a meta-oriented electron-donating group showed significant activity (IC50) against Candida albicans (17 {mu}M), C. krusei (34 {mu}M) and C. tropicalis (17 {mu}M). Results suggest this is a promising lead-compound for synthesis of potent antifungal agents. (author)

  14. Evaluation of the practical peak voltage quantity for clinical equipment in diagnostic radiology; Avaliacao da grandeza tensao de pico pratica em equipamentos clinicos utilizados em radiodiagnostico

    Energy Technology Data Exchange (ETDEWEB)

    Pires, Joao dos Santos Justo

    2007-07-01

    The objective of this work is to evaluate the calculation of the Practical Peak Voltage (PPV) from the voltage waveform and the kerma contrast for two kinds of X-ray equipment: a single phase clinical equipment, a three phase clinical equipment. The PPV from a mammography system voltage waveform will also be established. The development of this work involves intermediate objectives that indicate the quality of the used methods to calculate the PPV. One of these intermediate objectives is the comparison between the invasive calculations of PPV (using a voltage divider) with the response of kVp meter that calculate the PPV. Another intermediate objective is to compare the PPV with the Contrast Equivalent Voltage (the original non-invasive PPV definition). The variation of the PPV with quantities that influence in the voltage waveform like ripple and sample rate will also be contemplated in this work. The results showed that the PPV quantity could be invasive determined trustworthy. Therefore, the ripple quantity is the mainly influence to determinate the PPV that affecting the non-invasive determination. This fact suggest that the non-invasive instruments manufacturers must reevaluate the calculation of the PPV quantity in their instruments. (author)

  15. Evaluation of secondary crystallization effect in poly hydroxybutyrate and silanized coir dust composites; Avaliacao do efeito da cristalizacao secundaria em compositos de polihidroxibutirato e po de coco silanizado

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Carolina C. de; Costa, Marysilvia F. da; Thire, Rossana M.S.M., E-mail: ccmello@metalmat.ufrj.br [Programa de Engenharia Metalurgica e de Materiais/Universidade Federal do Rio de Janeiro - UFRJ - Centro de Tecnologia, Rio de Janeiro, RJ (Brazil)

    2011-07-01

    Polyhydroxybutyrate is a natural and biodegradable polyester, susceptible to secondary crystallization when it is stored at environment temperature. Coir dust is an agroindustrial waste which has good prospects for use as filler in composites. In this context, PHB-coir dust composites were produced. The compatibilization was made by coir dust silanization. The secondary crystallization evolution on materials was evaluated by x-ray diffraction. Its effect was verified by tension tests which presented that elastic modulus increases when crystallinity increases. (author)

  16. Evaluation of morphological changes of the skin after radiation-induced injury in Wistar rats;Avaliacao de alteracoes morfologicas da pele apos lesao radioinduzida em ratos Wistar

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Cherley Borba Vieira de

    2010-07-01

    The cancer covers a heterogeneous group of more than 100 diseases with different etiology and prognosis. Radiotherapy is one of the most commonly used treatment modalities, aiming at the destruction of cancer cells, using ionizing radiation. One of the limiting factors of radiotherapy is that radiation promotes the death of tumor cells in addition to injure healthy tissue neighboring the tumor, and may cause their death. Irradiation of the skin, accidental or for therapeutic purposes can trigger many injuries culminating in fibrosis, which implies functional alteration of the body. The evaluation of morphological effects associated with skin irradiation becomes essential to develop more effective radiation strategies and decreased morbidity; and in case of accidents, proper handling of the victim.Evaluate radio-induced dermal changes using a Wistar rats model irradiated with 10, 40 and 60Gy. Male Wistar rats, aged approximately three months, were pre-anesthetized with midazolam and xylazine and anesthetized with sodium pentobarbital, shaved in the back, immobilized on polystyrene support in the prone position and irradiated with doses of 10, 40 and 60 Gy, with 4MeV nominal energy electron beams. The skin was irradiated in a 3cm{sup 2} field, and used 0.5cm of tissue equivalent material, to obtain a homogeneous dose distribution. After irradiation, the animals remained on constant evaluation, and the lesions were recorded photographically. The animals were divided into groups and were killed on the irradiation day, 5, 10, 15, 25 and 100 days after irradiation. The skin was fixed in 10% formaldehyde; the samples were embedded in paraffin and cut. The sections were stained with hematoxylin-eosin, picrosirius red and immuno stained with antibody anti-TGF beta1. Another part of the tissue was fixed in 2.5% glutaraldehyde and processed for scanning electron microscopy. It was observed macroscopically the appearance of skin lesions similar to burns on the entire irradiated area. The optical microscope verified the early development of lesions in the 5 days group. After 10 days of irradiation it was already possible to see evidences of epidermal healing under the crust formed by the lesion. At 15 days after irradiation the tissue beneath the lesion had reconstructed epidermis. It was also observed the characteristics of tissue healing. It was also seen a significant polymorphonuclear cells infiltration. After 25 days at the higher doses the lesions remained, which did not occur at the lower dose, where the irradiated area of the animals were already completely healed. After 100 days of irradiation at 40Gy dose the wound was healed with the emergence of a well defined healed tissue. At the 60Gy dose, the lesion persisted in some animals, and in those that healing occurred the epidermis was a hypertrophied (acanthosis). It was visualized a tissue with their morphological aspect completely mis characterized, where it's possible to view a necrotic tissue. The results of the scanning electron microscopy analysis corroborate with the in optical microscopy findings, where it's possible to visualize the distortion of collagen fibers at the higher dosages. The results indicate that the used doses induced an important skin inflammatory process, activating the immune system. This fact leads to an increase in the expression of TGF beta1, one of the responsible for the increased production of extracellular matrix (ECM) by various cell types, mainly fibroblasts in injured tissues. Besides the increased expression of ECM, the TGF beta1 also promotes the inhibition of the degradation processes of the same. The intense expression of cytokines in irradiated skin can trigger the fibrosis process; consequently, affect the homeostasis of this organ due to the accumulation of ECM. (author)

  17. Dose evaluation in medical staff during diagnostics procedures in interventional radiology; Avaliacao da dose na equipe medica durante procedimentos diagnoticos de radiologia intervencionista

    Energy Technology Data Exchange (ETDEWEB)

    Bacchim Neto, Fernando A.; Alves, Allan F.F.; Rosa, Maria E.D.; Miranda, Jose R.A. [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Instituto de Biociencias. Departamento de Fisica e Biofisica; Moura, Regina [Faculdade de Medicina de Botucatu, SP (Brazil). Departamento de Cirurgia e Ortopedia; Pina, Diana R., E-mail: bacchim@ibb.unesp.br [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Faculdade de Medicina. Departamento de Doencas Tropicais e Diagnostico por Imagem

    2014-08-15

    Studies show that personal dosimeters may underestimate the dose values in interventional physicians, especially in extremities and crystalline. The objective of this work was to study the radiation exposure levels of medical staff in diagnostic interventional radiology procedures. For this purpose LiF:Mg,Ti (TLD-100) dosimeters were placed in different regions of the physician body. When comparing with reference dose levels, the maximum numbers of annual procedures were found. This information is essential to ensure the radiological protection of those professionals. (author)

  18. Contribution of ultrasonography and scintillography to the evaluation of parothyroid glands; Contribuicao da ultra-sonografia na avaliacao das glandulas paratireoideas

    Energy Technology Data Exchange (ETDEWEB)

    Craide, Rosany Helena [Sao Paulo Univ., SP (Brazil). Hospital das Clinicas. Servico de Ultra-som; Cerri, Giovanni Guido [Instituto do Coracao, Sao Paulo, SP (Brazil). Dept. de Diagnostico por Imagem; Custodio, Melani Ribeiro; Jorgetti, Vanda [Sao Paulo Univ., SP (Brazil). Hospital das Clinicas. Servico de Nefrologia; Oliveira, Ilka Regina S. [Sao Paulo Univ., SP (Brazil). Hospital das Clinicas. Inst. de Radiologia; Vermelho, Marli B.F. [Sao Paulo Univ., SP (Brazil). Hospital das Clinicas. Servico de Ultra-sonografia

    1999-02-01

    Sonography and scintilography are good methods for imaging the parathyroid adenomas and hyperplasias. The diagnostic methods were correlated in order to determine the sensitivity of sonographic evaluation with that of scintigraphy in the preoperative examinations for hyperparathyroidism suspected on clinical groups. Scintigraphic examinations were obtained using technetium-9 9 m and technetium-99m-sestamibi as radionuclide agents. A group of 36 patients was evaluated with sonography 19 being correlated with sestamibi. Our results suggest that sonography yields a sensitivity of 77 and 78.5%in comparison with scintigraphy with technetium-99m and with technetium-99m-sestamibi, respectively. The sonographic limitations are ectopic glands, enlarged thyroid goiter and posteriorly displaced adenomas. (author)

  19. Evaluation of the normal thoracic and abdominal aorta diameters by computerized tomography; Avaliacao dos diametros normais da aorta toracica e abdominal pela tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Lucarelli, Claudio Luiz

    1995-07-01

    The study was undertaken to evaluate, through computerized tomography, the diameters of the normal thoracic and abdominal aorta, as well as they are connected to gender, age and body surface area; and the ratio between measurements obtained at the ascending and descending limbs of the thoracic aorta, and between the abdominal aortic diameters. For that reason, we measured the widest anteroposterior diameters of the thoracic aortas at the levels of the arch, the root, the pulmonary artery, and the thoracic-abdominal transition, as well as the level of the emergence of the superior mesenteric artery, of the renal hila and just cephalad to the bifurcation of the abdominal aortas of 350 patients without cardiovascular diseases who had undergone computerized tomography of the thorax and/or abdomen for any other reasons. Observation and statistic analyses led us to conclude that: 1) both the thoracic and abdominal aortic diameters are reduced from their proximal to their distal portions; 2) the body surface influences the size of the aorta, although only extreme variations alter the vessel's caliber; 3) vessel diameter was observed to gradually increase with age; 4) men were found to have larger diameters than age matched women; 5) the ratio between the ascending and descending aortic diameters varies according to gender and age; 6) the relations between abdominal aortic diameters measured at the level of renal hila and cephalad to the bifurcation are independent from gender and age. But the relation between those measured at the level of the superior mesenteric artery and cephalad to the bifurcation are linked to gender, but not to age. (author)

  20. Aspects of the Iea-R1 research reactor seismic evaluation; Aspectos da avaliacao sismica do reator de pesquisa IEA-R1

    Energy Technology Data Exchange (ETDEWEB)

    Mattar Neto, Miguel [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    1996-07-01

    Codes and standards for the seismic evaluation of the research reactor IEA-R1 are presented. An approach to define the design basis earthquake based on the local seismic map and on simplified analysis methods is proposed. The site seismic evaluation indicates that the design earthquake intensity is IV MM. Therefore, according to the used codes and standards, no buildings, systems, and components seismic analysis are required. (author)

  1. Development of a methodology for automated assessment of the quality of digitized images in mammography; Desenvolvimento de metodologia para avaliacao automatizada da qualidade de imagens digitalizadas em mamografia

    Energy Technology Data Exchange (ETDEWEB)

    Santana, Priscila do Carmo

    2010-07-01

    The process of evaluating the quality of radiographic images in general, and mammography in particular, can be much more accurate, practical and fast with the help of computer analysis tools. The purpose of this study is to develop a computational methodology to automate the process of assessing the quality of mammography images through techniques of digital imaging processing (PDI), using an existing image processing environment (ImageJ). With the application of PDI techniques was possible to extract geometric and radiometric characteristics of the images evaluated. The evaluated parameters include spatial resolution, high-contrast detail, low contrast threshold, linear detail of low contrast, tumor masses, contrast ratio and background optical density. The results obtained by this method were compared with the results presented in the visual evaluations performed by the Health Surveillance of Minas Gerais. Through this comparison was possible to demonstrate that the automated methodology is presented as a promising alternative for the reduction or elimination of existing subjectivity in the visual assessment methodology currently in use. (author)

  2. Evaluation of thermal stability of paraffin wax by differential scanning calorimetry; Avaliacao da estabilidade termica de parafina por calorimetria diferencial de varredura

    Energy Technology Data Exchange (ETDEWEB)

    Godinho, K.O.; Silva, A.G.P.; Holanda, J.N.F. [Universidade Estadual do Norte Fluminense (LAMAV/UENF), Campos dos Goytacazes, RJ (Brazil). Grupo de Materiais Ceramicos], Email: holanda@uenf.br

    2010-07-01

    Phase change materials for heat storage are used as passive solar energy storage materials, which can be impregnated into construction materials. In this work the thermal stability (heating/cooling cycle) of the paraffin wax was investigated using differential scanning calorimetry. The latent heat and fusion temperature were determined for the following thermal cycles: 0, 30, 180 and 360. The thermal stability for paraffin wax infiltrated in support of gypsum was also determined. The experimental results showed that the paraffin wax showed good thermal stability in the states pure and infiltrated for up to 360 thermal cycles. (author)

  3. Preliminary evaluation of radionuclides incorporation in biocompatible and biodegradable seeds; Avaliacao preliminar da incorporacao de radionuclideos em sementes biocompativeis e biodegradaveis

    Energy Technology Data Exchange (ETDEWEB)

    Roberto, Wanderley dos Santos [Centro Federal de Educacao Tecnologica de Ouro Preto (CEFET-OP), MG (Brazil); Pereira, Marivalda M.; Campos, Tarcisio P.R. de [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Engenharia Nuclear

    2001-07-01

    The present work aims the development of radioactive seeds, biocompatible and biodegradable, with the objective of adding options in the cancer treatment. The work focus on the production of seeds biodegradable that incorporate radioisotopes with half life inferior than the degradation time of the material. The idea of producing devices with biodegradable materials impregnated with radioisotopes of short half life will offer new possibilities in the cancer treatment, since they can be used following the same procedures of the permanent interstitial brachytherapy, but using degradable materials compatible with the physiological environment. It will be discussed in particular the possible application of these seeds in the treatment of prostate cancer. A review of the subject and a preliminary evaluation of the viability of production of the seeds will be presented. The method of production of the seeds is based on the incorporation of Iodine and Samarium in glass matrixes obtained by sol-gel processing, XRF, and was done in the samples produced and the incorporation of Iodine and Samarium atoms was confirmed. (author)

  4. Evaluation of chemical elements migration from food packaging plastics into food; Avaliacao da migracao de elementos quimicos das embalagens plasticas para alimentos

    Energy Technology Data Exchange (ETDEWEB)

    Kamiya, Adriana M.; Fulfaro, Roberto; Saiki, Mitiko [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Supervisao de Radioquimica

    2000-07-01

    This work presents results of As, Cd, Co, Cr, Sb, Se, Sn, and Zn obtained in the analysis of plastics from food packing materials by instrumental neutron activation analysis. The radiometric method was also applied to evaluate the migration of Co and Sb from the plastic into the food simulant. The possible sources of the toxic elements in plastic materials and the advantages of radiometric method in the migration evaluation are discussed. (author)

  5. Evaluation of radiation effects on dental enamel hardness and dental restorative materials; Avaliacao do efeito da irradiacao na dureza do esmalte dental e de materiais odontologicos

    Energy Technology Data Exchange (ETDEWEB)

    Adachi, Lena Katekawa; Saiki, Mitiko [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Supervisao de Radioquimica; Campos, Tomie Nakakuki [Sao Paulo Univ., SP (Brazil). Faculdade de Odontologia. Dept. de Protese

    2000-07-01

    This research presents the results of the microhardness of human dental enamel and of the following dental restorative materials: three dental porcelains - Ceramco II, Finesse and Noritake, and two resin restorative materials - Artglass and Targis, for materials submitted to different times of irradiation at the IEA-R1m nuclear reactor under a thermal neutron flux of 10{sup 12}n cm{sup -2}.s{sup -1} . The results obtained indicated that there is a decrease of the surface microhardness when the enamel is irradiated for 1 h and when dental materials are irradiated for 3 h. However, enamels irradiated for 30 min. did not show significant change of their surface hardness. Therefore, the selection of irradiation time is an important factor to be considered when irradiated teeth or dental materials are used in the investigations of their properties. (author)

  6. Magnetic resonance imaging textural evaluation of posterior cranial fossa tumors in childhood; Avaliacao textural por ressonancia magnetica dos tumores da fossa posterior em criancas

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Joelson Alves dos; Costa, Maria Olivia Rodrigues da; Otaduy, Maria Concepcion Garcia; Lacerda, Maria Teresa Carvalho de; Leite, Claudia da Costa [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Dept. de Radiologia]. E-mail: joelson_alves@ig.com.br; Matsushita, Hamilton [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Dept. de Neurologia

    2004-08-01

    Objective: To distinguish healthy from pathological tissues in pediatric patients with posterior cranial fossa tumors using calculated textural parameters from magnetic resonance images. Materials And Methods: We evaluated 14 pediatric patients with posterior cranial fossa tumors using the software MaZda to define the texture parameters in selected regions of interest representing healthy and pathological tissues based on T2-weighted magnetic resonance images. Results: There was a statistically significant difference between normal and tumoral tissues as well as between supposedly normal tissues adjacent and distant from the tumoral lesion. Conclusion: Magnetic resonance textural evaluation is an useful tool for determining differences among various tissues, including tissues that appear apparently normal on visual analysis. (author)

  7. Environmental evaluation in the electric sector expansion planing: an strategic approach; Avaliacao ambiental no planejamento da expansao do setor eletrico: uma abordagem estrategica

    Energy Technology Data Exchange (ETDEWEB)

    Pires, Silvia Helena [Centro de Pesquisas de Energia Eletrica, Rio de Janeiro, RJ (Brazil)]. E-mail: silviah@cepel.br; Medeiros, Alexandre [Fundacao Padre Leonel Franca, Rio de Janeiro, RJ (Brazil); Lacorte, Ana; Aquino, Luiz C.S.; Farah, Pedro; Menezes, Paulo C. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia

    2002-07-01

    This paper presents a resume of the methodology developed for the Socio Environmental Studies Committee - CTSA - of the CCPE, aiming the incorporation of the environment dimension in the expansion indicative planning of the electric sector. The first results of the partial application to the 2001-2010 planning cycle are also presented.

  8. Economic impact evaluation of the Procap 1000: Deep Water Qualification Program from PETROBRAS; Avaliacao de impactos economicos do Procap 1000: Programa de Capacitacao em Aguas Profundas da PETROBRAS

    Energy Technology Data Exchange (ETDEWEB)

    Furtado, Andre T.; Pereira, Newton M. [Universidade Estadual de Campinas, SP (Brazil). Inst. de Geociencias. Dept. de Politica Cientifica e Tecnologica; Suslick, Saul [Universidade Estadual de Campinas, SP (Brazil). Inst. de Geociencias. Dept. de Administracao e Politica de Recursos Minerais; Freitas, Adriana G. de [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Planejamento de Sistemas Energeticos; Bach, Laurent [Universite Louis Pasteur, 67 -Strasbourg (France). Bureau d' Economie Theorique et Appliquee

    1999-07-01

    PETROBRAS, a Brazilian petroleum company, managed between 1986 and 1992 a program with purpose to dominate the necessary technology for the petroleum production up to 1000 meters depth. This program was going called Procap 1000. The aim of the work was to evaluate the impacts of Procap 1000. The proposed evaluation method by Beta was going used. The results are presented.

  9. Residual stress evaluation and curvature behavior of aluminium 7050 peen forming processed; Avaliacao da tensao residual em aluminio 7050 conformado pelo processo peen forming

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, R.R. de; Lima, N.B., E-mail: rolivier@ipen.b, E-mail: nblima@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Braga, A.P.V.; Goncalves, M., E-mail: anapaola@ipt.b, E-mail: mgoncalves@ipt.b [Instituto de Pesquisas Tecnologicas (IPT), Sao Paulo, SP (Brazil)

    2010-07-01

    Shot peening is a superficial cold work process used to increase the fatigue life evaluated by residual stress measurements. The peen forming process is a variant of the shot peening process, where a curvature in the plate is obtained by the compression of the grains near to the surface. In this paper, the influence of the parameters such as: pressure of shot, ball shot size and thickness of aluminum 7050 samples with respect to residual stress profile and resulting arc height was studied. The evaluation of the residual stress profile was obtained by sin{sup 2} {Psi} method. (author)

  10. Residual stress evaluation and curvature behavior of aluminum 7050 peen forming processed; Avaliacao da tensao residual em aluminio 7050 conformado pelo processo peen forming

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Rene Ramos de

    2011-07-01

    Shot peening is a superficial cold work process used to increase the fatigue life evaluated by residual stress measurements. The peen forming process is a variant of the shot peening process, where a curvature in the plate is obtained by the compression of the grains near to the surface. In this paper, the influence of the parameters such as: pressure of shot, ball shot size and thickness of aluminum 7050 samples with respect to residual stress profile and resulting arc height was studied. The evaluation of the residual stress profile was obtained by sin{sup 2} {psi} method. The results show that the formation of the curvature arc height is proportional to the shot peening pressure, of spheres size and inversely proportional to the thickness of the sample, and that stress concentration factor is larger for samples shot peened with small balls. On final of this paper presents an additional study on micro strain and average crystallite size, which can evaluate the profile of the samples after blasting. (author)

  11. Assessment of the supramolecular structures presents into biological samples by SAXS technique;Avaliacao das estrutras supramoleculares presentes em amostras biologicas atraves da tecnica de SAXS

    Energy Technology Data Exchange (ETDEWEB)

    Conceicao, A.L.C.; Antoniassi, M.; Poletti, M., E-mail: andre_conceicao@yahoo.com.b [Universidade de Sao Paulo (USP), Ribeirao Preto, SP (Brazil). Dept. de Fisica e Matematica

    2009-07-01

    In this work was made an assessment of the supramolecular structures presents into human breast tissue normal and pathological samples, as well as into two types of animals samples (tendon chicken and pork fat) using the small angle x-ray scattering (SAXS) technique. The scattering profiles of the samples were determined at the momentum transfer range O.150nm{sup -1}<=5:q(=4pi.sin({theta}/2)/{lambda})<=8.500nm{sup -1}. In this range, it was possible identify structures corresponding to collagen fibrils (glandular tissue) and to triacylglycerides (adipose tissue) from the correlation between the information extracted from the human breast tissues scattering profiles and those extracted from animals samples. (author)

  12. Evaluation of the life cycle of integrated production of ethanol and biodiesel; Avaliacao do ciclo de vida da producao integrada de etanol e biodiesel

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Simone Pereira de [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)], email: sp.souza@yahoo.com.br; Pacca; Sergio Almeida [Universidade de Sao Paulo (USP), SP (Brazil). Escola de Artes, Ciencias e Humanidades], email: spacca@usp.br

    2010-07-01

    Sugarcane and palm are amongst the crops with the highest yields, which can reach 6 to 7.5 thousand liters of ethanol per hectare year and 4 to 6 metric tons of oil per hectare year, respectively. A joint production of biofuels from these crops is an interesting alternative for life cycle assessment improvement through fossil fuel and greenhouse gas emissions reduction, besides energy efficiency gains. The objective of this work is comparing the Brazilian production system sugarcane ethanol with an integrated system proposal where the ethanol and palm biodiesel are produced together. This comparative study is based on a life cycle approach using the ISO 14.044/2006 and appropriate indicators. Production systems in Cerrado, Cerradao and grassland ecosystem were considered. The energy balance, carbon balance and land use change were evaluated. The integrated system includes a 100% substitution of biodiesel by diesel, which is used in life cycle agriculture stages. Distinct fractions of sugarcane used for sugar production were assessed. When all sugarcane is sent to sugar production, ethanol is produced by molasses. The data were collected by direct observation method by questionnaire and secondary sources. Three sugarcane mills situated in Sao Paulo state and a palm mill located in Para state were surveyed. Results showed a 164% increase in energy balance for the joint production system in comparison to the traditional system. Besides this, the joint production system demonstrated a 24% GHG emission reduction. For ethanol production by molasses, the energy balance was up to 59% and 162% higher in scenarios 1 and 2, respectively, which differ each other through of the boiler that was utilized. For GHG emission, the reduction can reach 91%. The land use change identify an average ecosystem carbon payback time for Cerrado, Cerradao and Degraded Grassland of 5, 10, and -5 years, respectively. In conclusion, the joint production system of sugarcane ethanol and palm biodiesel presents an improvement in energy balance, GHG emissions and land use change impacts in comparison to the traditional ethanol system. (author)

  13. Dynamic evaluation of the nominal capacity for connection of wind parks; Avaliacao dinamica da capacidade nominal para conexao de parques eolicos

    Energy Technology Data Exchange (ETDEWEB)

    Yip, Tony; Lloyd, Graeme; An, Chang [Areva T and D, Sao Paulo, SP (Brazil); Aten, Martin; Ferris, Bob [E.ON Central Networks (United Kingdom)

    2010-06-15

    The capacity dynamic determination was applied to 132 kV line, for protection and load management purposes, increasing the possibility of wind generation connection. The capacity was calculated based on climatic measurements, coordinate the automatic dispatch. To guarantee that the capacity was not surmounted, a backup system was used composed by relay. (author)

  14. Renewability emergy index calculation in the evaluation of the sustainability of a national economy; Calculo do indice de renovabillidade emergetica na avaliacao da sustentabilidade de uma economia nacional

    Energy Technology Data Exchange (ETDEWEB)

    Siche Jara, Raul Benito [Universidad Nacional de Trujillo, La Libertad (Peru). Fac. de Ciencias Agropecuarias. Escuela de Ingenieria Agroindustrial], e-mail: Siche.J.R@gmail.com; Ortega Rodriguez, Enrique [Universidade Estadual de Campinas (DEA/FEA/UNICAMP), SP (Brazil). Lab. de Engenharia Ecologica e Informatica Aplicada], e-mail: ortega@fea.unicamp.br

    2006-07-01

    In this study, the emergy methodology was used to analyze the sustainability of the Peruvian economic system. The resources (natural and not natural) and importations had been accounting in units of solar emergy using data of the Peruvian economy for the year 2004. Emergy is an energy measure based in the contribution of the resources and its influence, defined as the energy of a type required producing a flow or storage of another type. The focus of this study is the calculation of the emergy index call 'renewability' (REN), considered as a general measure of the ecological sustainability. In a long period, only systems or processes with high REN are sustainable. This index is calculated by the accounting of the resources renewed used in the economy in emergy units (2.17E+23 seJ) and divided by emergy total that enters to the economic system (6.93E+23 seJ), resulting a REN of 0.31. The renewable resources that use Peru almost represent 20% of the total of renewable resources available in the system. The great amount of renewable resources that Peru can potentially use was calculated in 11.44E+23 seJ, meaning that the system can be more sustainable if the economy is based on increasing the use of renewable resources and to diminish the use of non-renewable resources and imported resources. These data show that Peru has a relatively sustainable economy that can improve or get worse, depending of its politics in the use of resources. (author)

  15. Chemical and microbiological assessments of the multi mixture treated by gamma radiation; Avaliacao quimica e microbiologica da multimistura tratada por irradiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Goncalves, Cinthia Graciele

    2008-07-01

    In Brazil, the multi mixture have being used since the eighties as an alternative against severe infantile malnutrition of the poorest population. However, its use is still reason of controversies mainly due to: the presence of anti nutritional factors, the microbiological quality and the nutritional value. Considering the routine use of multi mixture in the region, this work aimed to evaluate samples of multi mixture were collected in the metropolitan area of the City of Belo Horizonte/MG for determining the anti nutritional factors (phytic and oxalic acids), the microbiological quality, the centesimal and mineral composition, and still the induced effect in these factors of the gamma radiation. For the analyses, the samples passed by the process of gamma irradiation at doses of: 2, 4, 6, 8 and 10 kGy and then were evaluated anti nutritional factors (phytic acid and oxalic), the microbiological quality (yeasts and molds, Salmonella, Coagulase positive Staphylococcus, Bacillus cereus, coliform to 45 deg C) to full percentage (moisture, ash, proteins, carbohydrates and lipids) and the efficiency of the method of Paramagnetic Electronic Resonance (EPR) in the detection of irradiated samples. The mineral composition of the samples was carried out by the irradiation by Neutronic Activation. The methods used were searched in literature. The obtained results suggest that the concentration of the phytic and oxalic acids can not be appropriated for the children with severe nutritional deficit and that it would be necessary additional control in their daily ingestion due to the absorption of essential minerals. In general the samples had presented acceptable microbiological quality for consumption, except by one of it. The data of the centesimal and mineral composition, in the usually recommended portions, showed lower concentration than recommended for children. Any significant alteration in phytic and oxalic acids as well as in the centesimal composition were detected after gamma irradiation. The electronic paramagnetic resonance can be detected irradiated samples. (author)

  16. Assessment of activity of nitrate-reducing bacterial souring control; Avaliacao da atividade de bacterias redutoras de nitrato no controle de acidificacao de reservatorios de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Kally A. de; Cammarota, Magali C.; Servulo, Eliana F.C. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Quimica

    2008-07-01

    The effect of nitrate addition in relation to NRB concentration was evaluated on biogenic H{sub 2}S generation in anaerobic microcosms with produced water. A 2{sup k} factorial experimental design was performed by using as response variables nitrate (NO{sub 3}{sup -}) and sulfate (SO{sub 4}{sup =}) consumption and nitrite (NO{sub 2}{sup -}) and sulfide (H{sub 2}S) production and as independent variables the SRB and NRB (10{sup 1} - 10{sup 7} MPN/mL) and NO{sub 3}{sup -} (127.5 - 727.5 mg/L) initial concentrations. Each condition was carried out under incubation at 30 deg C during 7, 14 and 28 days. The lowest sulfide production (0.4 - 0.8 mg/L) was achieved for 10{sup 4} MPN/mL of SRB and NRB and 427.5 mg/L nitrate. Also, a reduction of sulfide generation was obtained by nitrate addition when low SRB and NRB concentrations were established. In such condition, the produced sulfide is rather dependent of nitrate concentration. The increase of the NRB concentration has not resulted in the reduction of sulfide production, even when higher nitrate concentrations were used. (author)

  17. Evaluation of the effective dose in an anthropomorphic phantom in radiation emergencies; Avaliacao da dose efetiva em um fantoma antropomorfico em situacoes de emergencia radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Silva, L.K.; Santos, D.S., E-mail: liviatelecom@hotmail.com [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2015-07-01

    This study aims to perform a modeling of the human anatomy using Voxel models applied to Monte Carlo code and the Visual Monte Carlo software, simulating irradiation of the human body, so you can make the dose assessment in individuals who have been exposed to any external ionizing radiation source. Making the future, an assessment of both results with limits of validity of TECDOC-1162 expressions of the IAEA in case of point source.

  18. Synthesis and antimicrobial activities of new 4-thiazolidones derived from formipyridine thiosemicarbazones; Sintese e avaliacao da atividade antimicrobiana de novas 4-tiazolidinonas obtidas a partir de formilpiridina tiossemicarbazonas

    Energy Technology Data Exchange (ETDEWEB)

    Vercoza, George Leonardo; Feitoza, Danniel Delmondes; Alves, Antonio Jose; Aquino, Thiago Mendonca de; Lima, Jose Gildo de [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Ciencias Farmaceuticas], e-mail: jgildolima@gmail.com; Araujo, Janete Magali; Cunha, Ivana Glaucia B.; Goes, Alexandre Jose da Silva [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Antibioticos

    2009-07-01

    Twelve novel 4-thiazolidinone derivatives (2a-l) have been synthesized by reacting formylpyridine thiosemicarbazones (1a-l) and anhydride maleic in toluene. Their chemical structures were confirmed by IR, {sup 1}H and {sup 13}C NMR. The new compounds were submitted to in vitro evaluation against pathogenic Gram-positive, Gram-negative bacteria and yeasts. The findings obtained showed that the compounds 2a, 2d, 2e and 2g were effective against some of the bacterial strains used, whereas the compounds 2d, 2e and 2i exhibited a moderate antifungal activity against the yeast strains evaluated. An initial structure activity relationship (SAR) was established. (author)

  19. Isolation and cytotoxicity evaluation of some oxoaporphine alkaloids from Annonaceae; Isolamento e avaliacao da atividade citotoxica de alguns alcaloides oxaporfinicos obtidos de annonaceae

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Denise Brentan da; Matos, Maria de Fatima Cepa; Nakashita, Simone T.; Misu, Carina K.; Yoshida, Nidia Cristiane; Carollo, Carlos Alexandre; Fabri, Joao Roberto; Miglio, Hercules da Silva; Siqueira, Joao Maximo de [Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS (Brazil). Centro de Ciencias Biologicas e da Saude. Dept. de Farmacia]. E-mail: jmaximo@nin.ufms.br

    2007-07-01

    A different methodology was used to isolate and purify oxoaporphine alkaloids, as they are difficult to separate by the usual workup when in mixture. Alkaloid extracts from Annonaceae species were obtained by base/acid extraction. The extracts were concentrated and submitted to partition in solutions of acids of different pKa values, followed by separation by preparative TLC using 1 mm thick silica gel impregnated with oxalic acid (11.2% w/w). Liriodenine, lisycamine, lanuginosine, and O-methylmoschatoline were obtained and tested against tumoral cells (line Hep{sub 2}, ATCC-CCL 23, larynx carcinoma). Only O-methylmoschatoline (IC{sub 50} 12.4 muM) was more active than cisplatin (18.0 muM). (author)

  20. Evaluation of effects of ionizing radiation on materials used in dental restorations;Avaliacao dos efeitos da radiacao ionizante em materiais utilizados em restauracoes dentarias

    Energy Technology Data Exchange (ETDEWEB)

    Maio, Mireia Florencio

    2009-07-01

    This work consisted of quantitative studies of the effects caused by ionizing radiation on materials used in dental restorations (Titanium, Amalgam, Resin Composite and Glass Ionomer) aiming the deleterious effects of radiotherapy when patients with tumors in head and neck, arising when the teeth are restored within in the field of radiation. Samples were submitted to X-ray beams of 6 MV from a linear accelerator, VARIAN 2100C model. The samples were analyzed by X-ray fluorescence techniques to compare the chemical composition before and after the irradiation. The sample were submitted to Geiger-Mueller detectors and the ionization chambers in order to verify any residual radiation in the samples. The samples were also analyzed by gamma spectrometry by a Germanium detector. These tests were performed to determine small changes in the composition in the samples due to the radiation interaction. The results of this study may encourage the development of new research for alternative materials in dental restorations that can contribute to improve the quality of life of those patients with tumors of the mouth. (author)

  1. Phytochemical study and evaluation of the molluscicidal activity of Calophyllum brasiliense Camb (Clusiaceae); Estudo fitoquimico e avaliacao da atividade moluscicida do Calophyllum brasiliense Camb (Clusiaceae)

    Energy Technology Data Exchange (ETDEWEB)

    Gasparotto Junior, Arquimedes; Brenzan, Mislaine Adriana; Piloto, Izabel Cristina; Cortez, Diogenes Aparicio Garcia [Universidade Estadual de Maringa, PR (Brazil). Dept. de Farmacia e Farmacologia]. E-mail: dagcortez@uem.br; Nakamura, Celso Vataru; Dias Filho, Benedito Prado [Universidade Estadual de Maringa, PR (Brazil). Dept. de Analises Clinicas; Rodrigues Filho, Edson; Ferreira, Antonio Gilberto [Sao Carlos Univ., SP (Brazil). Dept. de Quimica

    2005-07-15

    The bioassay-guided fractionation against Biomphalaria glabrata of hydroalcoholic extracts of Calophyllum brasiliense aerial parts led to the isolation of the coumarin, named (-) mammea A/BB. The compound had its structure determined by both spectroscopic techniques (NMR {sup 1}H, NMR {sup 13}C, gHSQC, gHMBC and MS) and some literature comparison data. The probit analysis of (-) mammea A/BB showed LD{sub 50} = 0.67 ppm and LD{sub 90} = 1.47 ppm. In addition, the dichloromethane extract obtained from C. brasiliense leaves with significant molluscicidal activity against Biomphalaria glabrata was analyzed by HPLC-UV. (author)

  2. Evaluation of the inflammatory activity in chronic osteomyelitis. Contribution of the scintigraphy with polyclonal antibodies; Avaliacao de atividade inflamatoria em osteomielite cronica. Contribuicao da cintilografia com anticorpos policlonais

    Energy Technology Data Exchange (ETDEWEB)

    Sapienza, Marcelo Tatit

    1996-07-01

    Active chronic osteomyelitis or complicating osteomyelitis (superimposed on diseases that changes the normal bone structure fractures, post-surgery, prosthesis) can be difficult to diagnose by anatomic radiological imaging modalities, like plain radiograph and CT. These diseases frequently cause also increased bone remodeling, leading to nonspecific uptake of Tc-99m-bone scan agents and gallium-67. New radiopharmaceuticals with greater inflammation/infection avidity and specificity are being developed, including the nonspecific polyclonal immunoglobulin (IgG) labeled with technetium-99. Tc-99m-IgG may be available as a ready to use kit, with no reported side effects, low patient absorbed radiation dose and low cost. The mechanism of IgG uptake at the inflammation site has not been fully elucidated yet. Specific (receptor linking, physico-chemical immunoglobulin properties) and nonspecific mechanisms (enhanced vascular permeability and macromolecular exudate) has been suggested. IgG scintigraphy results are affected by the isotope, labeling procedure adopted and characteristics of the inflammatory focus. Nineteen patients with suspected osteomyelitis (active chronic osteomyelitis or violated bone osteomyelitis) were studied by Tc-99m-IgG scintigraphy (directly labeled polyclonal immunoglobulin, Sandoglobuilina - Sandoz). All patients also underwent standard three-phase bone scintigraphy using methylene diphosphonate (Tc-99m-MDP), gallium-67 scintigraphy and plain radiographs. Infection was found in 8 sites. Sensitivity and specificity for Tc-99m-MDP, gallium-67 and Tc 99m-IgG scintigraphy were, respectively, 88 and 36%, 75 and 73%,88 and 82%. All patients with false positive IgG scintigraphies had previous surgery. Other current scintigraphic procedures used in the diagnosis of osteomyelitis are also reviewed. (author)

  3. Evaluation of operational management in the oil terminals using human factor indicator; Avaliacao da gestao operacional em terminais com o uso do indicador de fator humano

    Energy Technology Data Exchange (ETDEWEB)

    Mendes, George L.D. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Lima, Gilson Brito Alves [Universidade Federal Fluminense, Niteroi, RJ (Brazil). LATEC. Mestrado Profissional em Sistemas de Gestao

    2005-07-01

    This research has as objective to analyze the continuous improvement in a management system at TRANSPETRO in Madre de Deus Terminal (BA), environment and occupational health, particularly in the reduction of the accident levels. We consider relevant in this research the effective implementation of the human factor that includes the boarding of the work system relating them it three points: individual activities, organizational processes of work and activities, emphasizing the management of these resources and the communication between them. The case study it was make in a company of logistic of fuels. The methodology was lead through bibliographical research and applied closed questionnaire (adaptation's baseline API 770 - Manager's Guide to Reducing Human Errors Improving - Improving in the Process Industries) in 2003 and 2005 with the manager, coordinators, supervisors, operators and others technician. Were analyzed results of the company in management security and occupational health, such as: pointers of the tax of frequency of accidents with and without removal, volume of leaked product and results of internal and external audits. We conclude that the importance of the human factor in the Safety Management that propitiated significant progress in the organization during the development of the research. (author)

  4. μSPECT: image evaluation using collimator type pinhole. Preliminary results; μSPECT: avaliacao da imagem utilizando colimador tipo pinhole: resultados preliminares

    Energy Technology Data Exchange (ETDEWEB)

    Miady, Leandro Sunao [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Sao Jose do Rio Preto, SP (Brazil); Squair, Peterson Lima [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil); Pozzo, Lorena, E-mail: lorena.pozzo@ipen.br [Universidade de Sao Paulo (USP), SP (Brazil)

    2015-04-15

    At scintigraphy, the method of obtaining tomographic image is called SPECT (single photon emission computed tomography), as well as the equipment able to acquire such tomographic images involving small animals can be called μSPECT. Although the equipment is directed to the acquisition of three-dimensional images, a need exists in certain studies to obtain two-dimensional images. This study aims to verify and analyze the two-dimensional image magnification factor for later application to the study of {sup 131}I dosimetry in mice. The experimental results allowed to analyze and compare the magnification factors for each parameter used for future experiments. (author)

  5. Technological evaluation of fuel cells using natural gas for distributed power generation; Avaliacao tecnologica da utilizacao de gas natural em celulas a combustivel para geracao distribuida de energia

    Energy Technology Data Exchange (ETDEWEB)

    Brandao, Mauricio O. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE). Programa de Engenharia Mecanica; Giannini, Marcio P.; Arouca, Mauricio C. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE). Programa de Planejamento Energetico

    2004-07-01

    The search for sustainable and more rational means of power generation motivates the scientific crew to search for more efficient and cleaner systems. Oil dependence becomes from the kind of development that the humanity had and cannot be dismissed. The question is how to use this source in a more intelligent way. Fuel Cells are electrochemical devices that convert into electric energy the chemical energy from oxi-reduction reactions between a fuel and an oxidant. The current fuel used in a Fuel Cell is hydrogen and oxygen is the oxidant. The great advantage of this device is its efficiency, higher than the one achieved with internal combustion engines. Also Fuel Cells are not limited by Carnot's efficiency. This paper is about the implementation of a distributed generation system using Fuel Cells. Technical aspects are approached together with economical and environmental needs. The already existence of Gas pipelines and the grown production of Natural Gas presented by Brazil turns it into a good market for the implementation of this energy source. The evaluation of this paper shows that is technically possible to use NG in Fuel Cells, mostly in South and Southeast regions, applying the distributed generation of energy concept. The most interesting in a strategic manner is that Brazil already have an indication that it's capable of developing this technology, opening a new market tuning with world's new technological developments. Many research centers develop this technology, not only from the cell composition itself, but also manufacturing techniques. (author)

  6. Impact of an evaluation quality program of mammography service of Distrito Federal - Brasil; Impacto de um programa de avaliacao da qualidade dos servicos de mamografia do Distrito Federal

    Energy Technology Data Exchange (ETDEWEB)

    Correa, Rosangela da Silveira

    2002-07-01

    Cancer is the second cause of death for Brazilian women and breast cancer is the most common neoplasm amongst women. Mammography is an essential tool for diagnosis and early detection of this disease. In order to be effective, the mammography must be of good quality. This study sought to evaluate the quality of these services in the Federal District and the impact of an intervention involving inspection and education. The universe of 41 mammography services in the Federal District was studied between June and August 2001. Two instruments were used 1) a proposed evaluation protocol of the National Agency for Health Surveillance (ANVISA) and 2) a protocol for evaluation of image quality and care. The intervention included the initial inspection, a training activity, and a formal notification by the health authorities of the Federal District. Image quality was compared before and after the intervention. The existing infrastructure in the DF is of good quality, but the services have low productivity, they do not treat patients sent by the public health system, they have an inadequate geographic distribution with most in the central neighborhood, and the low income female population has restricted access to early detection of cancer. Of the 36 services who completed the study, none was above 90% conformity in image quality before the interventions, whereas 10 were above 90% afterwards. The greatest improvements were in chassis maintenance (services without chassis with defects went from 10 to 25), breast compression (services in conformity went from 7 to 20) and visualization of micro calcifications (32 services in conformity before and 35 afterwards). The results of the ANVISA protocol bore no relation to final image quality, a central issue for early cancer detection. In spite of the existence of many services, most were not of quality and population access was restricted. The intervention under study was shown to be effective for improving quality, nevertheless ongoing action is needed to resolve the remaining problems and to increase the impact. The proposed method for public monitoring should be modified to evaluate primarily the quality of the final exam provided to the consumer. (author)

  7. Evaluation of the photo-fenton reaction in the decomposition of tick residues; Avaliacao da reacao foto-fenton na decomposicao de residuos de carrapaticida

    Energy Technology Data Exchange (ETDEWEB)

    Gromboni, Caio Fernando; Ferreira, Antonio Gilberto [Universidade Federal de Sao Carlos, SP (Brazil). Dept. de Quimica; Kamogawa, Marcos Yassuo [Sao Paulo Univ., Piracicaba, SP (Brazil). Escola Superior de Agricultura Luiz de Queiroz. Dept. de Ciencias Exatas; Nogueira, Ana Rita de Araujo [Embrapa Pecuaria Sudeste, Sao Carlos, SP (Brazil)]. E-mail: anarita@cppse.embrapa.br

    2007-03-15

    Experimental procedures based on factorial design and surface response methodology were applied to establish experimental conditions for the decomposition of a 1:400 (v/v) Supocade (chlorfenvinphos 13.8% and cypermethrin 2.6%) solution, used to control cattle ticks. Experiments exploring photo-oxidative reactions were performed with and without UV radiation, fixing exposition time and pesticide volume, and varying the oxidant mixture. The use of 3.6 mmol L{sup -1} Fe{sup 2+} plus 1.9 mol L-1 H{sub 2}O{sub 2} plus UV radiation provided destruction of 94% of the original carbon content and reduction of aromatic, aliphatic and carbinolic compounds, evaluated by determination of residual carbon content by ICP OES and NMR analysis. (author)

  8. Magnetic resonance imaging pre- and postoperative evaluation of tetralogy of Fallot; Avaliacao pre e pos-operatoria da tetralogia de Fallot por ressonancia magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Bernardes, Renata Junqueira Moll; Simoes, Luiz Carlos [Instituto Nacional de Cardiologia (INC), Rio de Janeiro, RJ (Brazil). Servico de Cardiologia da Crianca e do Adolescente; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia]. E-mail: edmarchiori@bol.com.br; Bernardes, Paulo Manuel de Barros; Gonzaga, Maria Beatriz Albano Monzo [Rede Labs/D' Or, Rio de Janeiro, RJ (Brazil)

    2004-08-01

    The purpose of this study was to assess the usefulness of magnetic resonance imaging (MRI) in the pre- and postoperative evaluation of patients with tetralogy of Fallot. Twenty patients aged 1 to 29 years were prospectively evaluated with black-blood and contrast-enhanced angiographic techniques, 11 with the classic form of tetralogy of Fallot and 9 with tetralogy of Fallot and pulmonary atresia. MRI studies provided adequate visualization of the aorta that was classified as dilated or not dilated, and definition of its position in all cases. The use of contrast-enhanced MR angiographic techniques provided excellent imaging of the main right and left pulmonary arteries. The results suggest that MRI, including contrast-enhanced angiography techniques, is a useful tool in the evaluation of patients with tetralogy of Fallot before and after cardiac surgery since it provides important anatomical information that is not always obtained with echocardiography. MRI can be considered an alternative to cardiac catheterization, particularly in the evaluation of the pulmonary vascular anatomy. (author)

  9. A regulatory model for conformity evaluation in natural gas building installations; Um modelo regulatorio para avaliacao da conformidade das instalacoes prediais de gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Fossa, Alberto Jose; Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia

    2008-07-01

    The challenge of the Brazilian growth needs to consider necessarily the energy arrangements, and natural gas has relevant participation in this matter. The possibility of its end use that make possible an effective adequacy of our energy matrix must be supported by modern concepts of quality and conformity. In this particular, the program of 'Tecnologia Industrial Basica' (TIB), including concepts and application of conformity evaluation processes, is considered basic for the construction of a consistent gas market. This paper present the Brazilian reality related to TIB aspects and elements, from which it constructs a technician and regulatory building gas installations model proposal for a conformity evaluation program in the country. (author)

  10. Comparison of the automated evaluation of phantom mama in digital and digitalized images; Comparacao da avaliacao automatizada do phantom mama em imagens digitais e digitalizadas

    Energy Technology Data Exchange (ETDEWEB)

    Santana, Priscila do Carmo, E-mail: pcs@cdtn.b [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Dept. de Engenharia Nuclear. Programa de Pos-Graduacao em Ciencias e Tecnicas Nucleares; Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Fac. de Medicina. Dept. de Propedeutica Complementar; Gomes, Danielle Soares; Oliveira, Marcio Alves; Nogueira, Maria do Socorro, E-mail: mnogue@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2011-07-01

    Mammography is an essential tool for diagnosis and early detection of breast cancer if it is provided as a very good quality service. The process of evaluating the quality of radiographic images in general, and mammography in particular, can be much more accurate, practical and fast with the help of computer analysis tools. This work compare the automated methodology for the evaluation of scanned digital images the phantom mama. By applied the DIP method techniques was possible determine geometrical and radiometric images evaluated. The evaluated parameters include circular details of low contrast, contrast ratio, spatial resolution, tumor masses, optical density and background in Phantom Mama scanned and digitized images. The both results of images were evaluated. Through this comparison was possible to demonstrate that this automated methodology is presented as a promising alternative for the reduction or elimination of subjectivity in both types of images, but the Phantom Mama present insufficient parameters for spatial resolution evaluation. (author)

  11. Situational quality evaluation of mammography services at state of Minas Gerais, Brazil; Avaliacao situacional da qualidade dos servicos de mamografia do estado de Minas Gerais, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Joana, Georgia S.; Oliveira, Mauricio de; Andrade, Mauricio C. de; Cesar, Adriana C.Z., E-mail: georgia.santos@saude.mg.gov.b, E-mail: mauricio.cavalcanti@saude.mg.gov.b, E-mail: adrianac@saude.mg.gov.b, E-mail: mauricio.oliveira@saude.mg.gov.b [Secretaria de Estado da Saude de Minas Gerais (SVS/SES-MG), Belo Horizonte, MG (Brazil). Superintendencia de Vigilancia Sanitaria; Oliveira, Marcio A.; Nogueira, Maria do S., E-mail: marcio.alves@saude.mg.gov.b, E-mail: mnogue@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Peixoto, Joao E. [Instituto Nacional de Cancer (INCA), Rio de Janeiro, RJ (Brazil)

    2011-07-01

    Breast cancer is the leading cause of cancer deaths in women. Currently, the most effective method for early detection of this cancer is the mammography, and to achieve the standard definition and contrast, the whole system of imaging must operate under optimal conditions. This paper presents the results of the assessment of mammography centers in the state of Minas Gerais, which was held with the aim of supporting the actions of the State Program of Quality Control in Mammography. These results indicated that less than half of mammography achieved the minimum standard of image quality, endorsing the need of a monitoring more efficient and effective, which led to the establishment, in Minas Gerais, of the monthly monitoring of image quality in mammography. (author)

  12. Analysis of an in-line diesel production system through event driven simulation; Avaliacao do esquema de producao em linha de diesel atraves da simulacao por eventos discretos

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Gilsa P.; Naegeli, Guilherme S.T. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES); Santos, Nilza M.Q. [PETROBRAS S.A., Mataripe, Salvador, BA (Brazil). Refinaria Landulfo Alves (RLAM); Netto, Joaquim D.A. [DNV Energy Solutions, Porto Alegre, RS (Brazil)

    2008-07-01

    The interactions between refining processes (such as distillation, hydrotreatment, etc.) and typical transfer and storage operations (mixtures, decantation, storage, etc.) provide a high complexity to the refineries production systems of petroleum derivatives. These production systems are characterized by many aspects, such as: blending rules, feed composition, petroleum campaigns, storage tanks limitations, continuous and batch processes interactions, etc. Besides these operational aspects, the equipment and systems' reliability has strong influence on the level of production goals achievement and petroleum derivatives quality specification. Looking for a higher economic efficiency and in order to provide refineries with orientation about resources optimization for their petroleum derivatives' production systems, the development of a methodology capable of being applied since the design phase to identify systems limitations and improvement opportunities, considering all the raised aspects, is a very important task. With this objective, this article presents the main points of an evaluation that was conducted during the conceptual design for a diesel in-line blending production system proposed by a Brazilian refinery, detailing the main steps of the methodology that was developed through this analysis, based on discrete event simulation. (author)

  13. Magnetic resonance imaging of sella turcica: evaluation of patients with galactorrhea, amenorrhea and hyperprolactinemia; Ressonancia magnetica da sela turca: avaliacao de pacientes com galactorreia, amenorreia e hiperprolactinemia

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Alair Augusto Sarmet M.D. dos [Hospital Universitario Antonio Pedro, Niteroi, RJ (Brazil). Dept. de Radiologia; Moreira, Denise Madeira [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia; Andreiuolo, Pedro Angelo [Beneficencia Portuguesa de Niteroi, RJ (Brazil). Servico de Radiologia Santa Cruz Scan

    1999-08-01

    We have selected 135 cases of patients who have done magnetic resonance imaging of sella region, carried out from September, 1991 to August, 1996, who had galactorrhea (G), amenorrhea(A), and hyperprolactinemia (H), isolated or in association. The patients were divided in seven groups, according to the presence of these symptoms and signs. All examinations were made in a private clinic in the city of Rio de Janeiro, Brazil. Correlating these patients with the results of the magnetic resonance images, we found 57 micro adenomas, 31 normal examinations, 22 macro adenomas, 11 pituitary hyperplasias, 7 empty sella and 7 cases included in other aspects. The micro adenoma predominated in groups 1 (GAH), 2 (GH), 3 (HA) and 5 (H), that is, in all groups whose patients had hyperprolactinemia. In macro adenomas, a bright signal on T 1-weighted images indicates pituitary apoplexy with intratumoral hemorrhage. All in all, the magnetic resonance imaging is excellent method to be used in the evaluation of patients with changes in the hypothalamic-pituitary axis. (author)

  14. Quality of life evaluation of workers for diagnostic radiology services; Avaliacao da qualidade de vida dos trabalhadores de servicos de radiodiagnostico

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Ivani Martins

    2011-07-01

    The main objective of this study was to evaluate the quality of life (QOL) of diagnostic radiology services workers at a hospital of Sao Paulo city. It aimed also to draw the profile of these workers identifying the variables, as its influence on their quality of life. A descriptive exploratory study with qualitative and quantitative approaches was carried out. The data were collected using the questionnaires: the abbreviated instrument for the assessment of the QOL, World Health Organization Quality of Life Instrument bref (WHOQOL-bref) and a questionnaire including the social demographic variables, work conditions and the variables that express the lifestyle of individuals, both questionnaires self-applied. The sample was formed by 118 workers, among them: physicians, technologists/technicians in radiology, nurses, technicians and assistants in nursing, and others health professionals. The data analysis included descriptive statistics, nonparametric tests and the use of a linear regression model. The reliability of the instrument for the studied sample was verified by Cronbach's Alpha Coefficient ({alpha}). The WHOQOL-bref proved to be an adequate instrument, with a good level of internal consistency ({alpha}=0.884), being easily and quickly administrated for the evaluation of the QOL. The study provided an overview of the perception of quality of life of the studied group. (author)

  15. Assessment of natural radioactivity in wall paints of commercial use in Brazil; Avaliacao da radioatividade natural em tintas de uso comercial no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Fonseca, Leandro Milhomens da

    2016-11-01

    Natural radioactivity in soils, rocks and construction materials, due to {sup 40}K and the natural series of {sup 232}Th and {sup 2}'3{sup 8}U, is the main contribution to external exposure in mankind. In this work, activity concentrations of {sup 226}Ra ({sup 238}U series), {sup 232}Th and {sup 4}'0K were determined for 50 white latex wall paints samples, commercialized in Brazil, namely 15 Economic quality samples, 15 Standard quality samples and 20 Premium quality samples and for a single titanium dioxide sample. The samples were tightly sealed and stored for a minimum period of 30 days, to reach the radioactive secular equilibrium from {sup 238}U and {sup 232}Th series, then measured by high resolution gamma ray spectrometry. The activity concentration was determined using the weighted average concentrations of {sup 214}Pb and {sup 214}Bi for {sup 226}Ra and {sup 228}Ac, {sup 212}Pb and {sup 212}Bi for {sup 232}Th. The {sup 4}'0K activity concentration was determined by its single transition of 1460.8 keV. Self attenuation correction factors of the samples whose densities are higher than 1.0 g.cm{sup -3}, were determined and used to make the necessary corrections. The radiological indices radium equivalent activity (Ra{sub eq}), activity concentration index (I{sub γ}), internal exposure risk index (H{sub in}) and external exposure risk index (H{sub ex}) and also the absorbed dose rate (D) and annual effective dose (D{sub ef}) were calculated from the activity concentrations of {sup 226}Ra, {sup 232}Th and {sup 40}K. The activity concentration values for {sup 226}Ra ranged from under the minimum detectable activity to 38.7 Bq.kg{sup -1}, for {sup 232}Th from under the minimum detectable activity to 101.2 Bq.kg{sup -1} and for {sup 40}K from under the minimum detectable activity to 256 Bq.kg{sup -1}. Ra{sub eq} ranged from 1.41 Bq.kg{sup -1} to 203 Bq.kg{sup -1}, I{sub γ} ranged from 0.0047 to 0.720, H{sub in} from 0.0076 to 0.653 and H{sub ex} from 0.0038 to 0.549. The absorbed dose rate ranged from 0.170 nGy.h{sup -1} and 21.3 nGy.h{sup -1} and the annual effective dose ranged from 0.83 μSv and 104.2 μSv. The results show that the activity concentrations of the wall paints studied in this work are below the recommended limits by Hassan et al. for Ra{sub eq} (370 Bq.kg{sup -1}), by European Commission for I{sub γ} (limit of 2 for superficial materials) and by the Organisation for Economic Co-operation and Development for H{sub in} and H{sub ex} (both with limit of 1), for all the 50 samples, assuring the safety of these wall paints with respect to radiological protection. (author)

  16. Morpho-functional study of ionizing radiation effects on the rabbits` femoral vein; Avaliacao morfofuncional do efeito da radiacao ionizante sobre a veia femoral. Estudo experimental em coelhos

    Energy Technology Data Exchange (ETDEWEB)

    Sakiyama, Mauro Yoshimitsu

    1995-12-31

    In this study we evaluate the effects of the ionizing radiation on the rabbits femoral vein. The samples of femoral vein were obtained from 56 New Zealand rabbits, male with ageing from 90 to 120 days, that were divided into 4 groups of 14 animals: one control group non-irradiated and three animal groups sacrificed 2 days, 14 days and 90 days after irradiation. In the three irradiated rabbits groups, each animal received the total dose 4000 cGy (rads) divided in 10 sessions of 400 cGy, a dose equivalent that utilized on clinical therapeutic. A morpho functional study of vein samples was carried out with: light microscopy: stained by hematoxin - eosin, Masson`s tricromic, and Verhoeff. Immunohistochemical: reactions of immunoperoxidase with monoclonal mouse anti-human endothelial cell factor CD-31 and anti-human Von Willebrand factor (factor VIII), to study the vein endothelium. Histomorphometry of elastic fiber system stained by Weigert`s resorcin-fuchsin with and without prior oxidation with oxone; for the study of mature, elaunin or pre-mature and oxytalan or young elastic fibers. Electronic microscopy: transmission and scanning. With the methodology utilized we observe changes in the femoral vein of the animals submitted to irradiation in relation to the control group, thus described: there is formation of vacuoles between the endothelium and the basal membrane, called sub endothelial vacuoles, in focal areas. The factor VIII and CD-31 endothelial antigens are preserved with no changes in their functions. Focal alterations are present in the endothelial surface with disorder in the setting and orientation of the endothelial cells. there is degeneration of the elastic fibers with significant decrease in their quantity in the stage, 2 days and 14 days after irradiation. There is increase in the quantity of elastic fibers in the late stage, 90 days after irradiation, tending to normality. In this present study, the changes described are not accompanied by venous thrombosis. (author) 101 refs., 22 figs., 2 tabs.

  17. Evaluation of the efficiency of injection of polyacrylamide in different reservoir-rock samples; Avaliacao da eficiencia de injecao de poliacrilamida em diferentes amostras de rocha-reservatorio

    Energy Technology Data Exchange (ETDEWEB)

    Marcelino, Cleuton P.; Valentim, Adriano C.M.; Medeiros, Ana Catarina R. de; Girao, Joaquim H.S.; Barcia, Rosangela B. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2004-07-01

    Water soluble polymers have been used extensively in the petroleum recovery, due to their ability in increasing the viscosity of the injection water and to reduce water/oil mobility ratio and the water relative permeability in the reservoir. This reduction acts favorably as a secondary effect, and it reestablishes part of the pressure in the reservoir after the flow of the polymer, causing a correction of the injection profile in the wells through the restructuring of the resident fluids in the porous media. Nevertheless, some parameters influence the improve of this mechanism, such as petrophysics properties, chemical composition of the rock, adsorption, resistance factor and the residual resistance factor. Many paper in the area of polymers applied to the enhanced petroleum recovery indicate a high efficiency in the injection of different partially hydrolysed polyacrylamides, in different concentrations, or even in different injection conditions, as: temperature, flow, among others. In this work it was evaluated the behavior and efficiency of partially hydrolysed polyacrylamide flooding on outcrop cores from Botucatu, Rio Bonito, Clashach and Assu, using core flow tests and computer simulations. (author)

  18. Performance evaluation on projects of energy efficiency of AES ELETROPAULO - indicators proposition; Avaliacao de desempenho de projetos do programa de eficiencia energetica da AES Eletropaulo - proposicao de indicadores

    Energy Technology Data Exchange (ETDEWEB)

    Saidel, Marco Antonio; Gimenes, Andre Luiz Veiga; Braga, Lillian Kariny Queiroz Serra; Rangel, Paulo Jose da Silva Mourao; Sigoli, Jose Marcelo [Universidade de Sao Paulo (USP), SP (Brazil). Dept. de Engenharia de Energia e Automacao Eletricas. Grupo de Energia; AES ELETROPAULO, SP (Brazil)]. E-mail: saidel@pea.usp.br; gimenes@gmail.com; lillian.braga@poli.usp.br; rangel@pea.usp.br; marcelo.sigoli@aes.com

    2006-07-01

    This work proposes a series of quality and performance indicators for quantitatively and qualitatively evaluation of Energy Efficiency of the Law 9991/2000, through a punctuation criterion, and to evaluate the performance of the Energy Service Companies (ESC), from the results of the projects presented and executed considering their final results related to presented proposals.

  19. Evaluation and analysis of the energetic efficiency of center pivot irrigation systems; Avaliacao e analise da eficiencia energetica na irrigacao em sistemas pivo central

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Aureo C. de [Universidade Federal da Grande Dourados (UFGD), Dourados, MS (Brazil). Unidade II], email: aureolima@ufgd.edu.br; Guimaraes Junior, Sebastiao C.; Camacho, Jose R. [Universidade Federal de Uberlandia (UFU), MG (Brazil). Nucleo de Energia Rural e Fontes Alternativas de Energia], emails: scguimaes@ufu.br, jrcamacho@ufu.br; Fietz, Carlos R. [EMBRAPA Agropecuaria Oeste, Dourados, MS (Brazil)], email: fietz@cpao.embrapa.br

    2009-07-01

    With an irrigated area of approximately 710,500 ha in Brazil, it is possible to estimate an annual electricity consumption of 1,928 G Wh per year due to center pivot systems. Considering the need of optimization of the irrigated agricultural production, the energies that are dissipated in the suction pipes, water supply, lateral lines and sprinkler systems are analyzed in this study and an equation is proposed to determine the useful power of center pivot irrigation systems. Three center pivot systems located in Itamarati I (a Government settlement for the landless in the city of Ponta Pora, State of Mato Grosso do Sul, Brazil) were evaluated and measures of energetic efficiency were simulated in order to determine a viable economic configuration to meet the life span of the equipment. The systems were characterized by the energy use and results show that the average irrigation energetic efficiency may be raised from 14.9 to 25.9% leading to a possible reduction of R$ 118,800 per year over 7,200 ha, equivalent to 11% of the yearly expenses with electricity of the whole area. (author)

  20. Importance of evaluation of uncertainties on the measurement of natural gas and petroleum volumes; Importancia da avaliacao das incertezas na medicao dos volumes de petroleo e gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Silva Filho, Jose Alberto Pinheiro da; Oliveira, Thiago Barra Vidal de; Mata, Josaphat Dias da [PETROBRAS, Rio de Janeiro, RJ (Brazil)], Emails: jose.pinheiro@petrobras.com.br, thiagovidal@petrobras.com.br, josaphat@petrobras.com.br; Val, Luiz Gustavo do [Instituto de Qualidade e Metrologia (IQM), Rio de Janeiro, RJ (Brazil)], E-mail: gdoval.iqm@petrobras.com.br

    2009-07-01

    The measurement is considered as the 'cash register' of the enterprises, increasing the accuracy and the exigence at each step when come close to the delivery points, where the 0.1 % of differences are discussed. The work presents the approach used in the evaluation of measurement uncertainties in the volumes obtained of petroleum and natural gas at the processes of production in Brazil, and in the international level as well.

  1. Evaluation of occupational exposure during the exploration and physical processing of monazite; Avaliacao das exposicoes ocupacionais durante as etapas de exploracao e beneficiamento fisico da monazita

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Joao Torres de

    2006-07-01

    In Brazil the most important concentrations of monazite sands occur in the beaches and sandbanks that extend throughout the coast, from the State of Rio Grande do Norte down to the State of Rio Grande do Sul, Brazil. Nowadays, the most important Brazilian monazite concentrations - considered as being the fourth worldwide reservoir of rare-earth elements - are located at the north seacoast of the State of Rio de Janeiro, near Buena town. At this location the Brazilian Nuclear Industries - INB - manages an industrial complex for prospecting, mining and physical separation and concentration of monazite sands. Among the elements present at the monazite sands there are the radioelements thorium and uranium, which make the monazite sand a radioactive mineral. Monazite is constituted basically of 62% in TR{sub 2}0{sub 3} (rare-earth oxides), 5,5% of thorium in Th0{sub 2} (thorium oxide) and 0,25% of uranium in U{sub 3}0{sub 8} (uranium oxide). The general objective of the present work was to estimate the occupational doses at the industrial complex for prospecting, mining and physical separation and concentration of monazite sands located at Buena, at the north of the State of Rio de Janeiro. The occupational exposures occur mainly through the inhalation of airbone dust particles of mineraIs containing thorium and uranium, during the prospection and physical separation and concentration of monazite. To evaluate the impact of the occupational exposures during the physical separation and concentration of monazite, it was necessary to evaluate the effective equivalent doses due to thorium contamination of the air and the exposures due to the daughter radionuclides from the natural series of uranium and thorium. The results obtained at the present work showed that, although occupational doses are within the annual dose limits established by the Brazilian regulatory authority - CNEN - in some of the working places within the industrial complex the concentrations of radionuclides in air are above the maximum recommended levels. (author)

  2. Quantitative computed tomography as a test of endurance for evaluation of bony plates; Utilizacao da tomografia computadorizada quantitativa como teste de resistencia para avaliacao de placas osseas

    Energy Technology Data Exchange (ETDEWEB)

    Melo Filho, E.V.; Costa, L.A.V.S.; Oliveira, D.C. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil); Freitas, P.M.C. [Escola de Veterinaria - Universidade Federal de Minas Gerais - Belo Horizonte, MG (Brazil); Teixeira, M.W.; Costa, F.S. [Universidade Federal Rural de Pernambuco - Recife, PE (Brazil)

    2012-06-15

    Quantitative computed tomography was used to determine the radiodensity of bony plates. The CT scans provided information regarding radiodensity of bony plates and allowed to verify the uniformity of bone mineral density in their scope. The proposed methodology should be considered as another tool for determining the resistance of these biomaterials. (author)

  3. Assessment in dogs tympanic bulla, through virtual tomographic endoscopy; Avaliacao de bulas timpanicas em caes, por meio da endoscopia tomografica virtual

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Luciana Carandina da; Sabino, Emanuelle Guidugli, E-mail: lucianacarandina@uol.com.br [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria. Dept. de Reproducao Animal e Radiologia Veterinaria; Vulcano, Luiz Carlos; Machado, Vania Maria de Vasconcelos [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria

    2012-07-01

    Dogs usually have problems related to the auditory canal. For the diagnosis of these pathologies, it is necessary a physical examination and, in some cases radiographic examination and computed tomography. The tympanic bulla is not easily visualized radiographically, since there is many structures of the brain overlaying the image obtained. The computed tomography has been the technique of choice to assess this structure faithfully. A new alternative assessment of the tympanic bulla is tomographic virtual endoscopy, which allows an improvement of the image obtained through the virtual tomographic technique. This paper provides information on the use of computed tomography, and a new technique, tomographic virtual endoscopy, in order to make the improvement of these techniques, and prove the reliability of these changes in the diagnosis of ear canals of dogs. Therefore, we performed the computed tomography of the tympanic bulla on healthy animals, and later performed image reconstruction in three-dimensional (3D) mode for virtual endoscopy. (author)

  4. Chemical constituents and evaluation of antibacterial activity of Macroptilium lathyroides (L.) Urb. (Fabaceae); Constituintes quimicos e avaliacao da atividade antibacteriana de Macroptilium lathyroides (L.) Urb. (Fabaceae)

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Leoncio M. de; Gois, Roberto W. da S.; Lemos, Telma L. G.; Arriaga, Angela M. C.; Andrade-Neto, Manoel [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Departamento de Quimica Organica; Santiago, Gilvandete M.P., E-mail: gil@ufc.br [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Departamento de Farmacia; Braz-Filho, Raimundo [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil). Centro de Ciencias e Tecnologias; Costa, Jose G.M. da; Rodrigues, Fabiola F.G. [Universidade Regional do Cariri, Crato, CE (Brazil). Departamento de Quimica Biologica

    2013-11-01

    The chemical investigation of the stems and branches of Macroptilium lathyroides led to the isolation of a mixture of {beta}-sitosterol and stigmasterol. The extracts from the roots allowed the isolation of lasiodiplodin, a mixture of stigmast-4-en-6{beta}-ol-3-one and stigmast-4,22-dien-6{beta}-ol-3-one, de-O-methyllasiodiplodin, genistein and lupinalbin A. The structures of the isolated compounds were assigned on the basis of their NMR data, including comparison of their spectral data with values described in the literature. The antibacterial activity of crude extracts from stems, branches and roots was evaluated. This is the first report involving the chemical investigation of this species. (author)

  5. Evaluation of average glandular dose in digital and conventional systems of the mammography; Avaliacao da dose glandular media em sistemas digitais e convencionais de mamografia

    Energy Technology Data Exchange (ETDEWEB)

    Xavier, Aline C.S.; Barros, Vinicius S.M.; Khoury, Hellen J., E-mail: alinecx90@gmail.com, E-mail: vsmdbarros@gmail.com, E-mail: hjkhoury@gmail.com [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Mello, Francisca A. de, E-mail: francissamello@yahoo.com.br [Hospital das Clinicas do Recife (HCR/UFPE), PE (Brazil)

    2014-07-01

    Mammography is currently the most effective method of diagnosis and detection of breast pathologies. The main interest in this kid of exam comes from the high incidence rate of breast cancer and necessity of high quality images for accurate diagnosis. Digital mammography systems have several advantages compared to conventional systems, however the use of digital imaging systems is not always integrated to an image acquisition protocol. Therefore, it is questionable if digital systems truly reduce the dose received by the patient, because many times is introduced in the clinics without optimization of the image acquisition protocols. The aim of this study is to estimate the value of incident air Kerma and average glandular dose (AGD) in patients undergoing conventional and digital mammography systems in Recife. This study was conducted with 650 patients in three hospitals. The value of incident air Kerma was estimated from the measurement of the yield of equipment and irradiation parameters used for each patient. From these results and using the methodology proposed by Dance et al. the value of the average glandular dose was calculated. The results obtained show that the lowest value of AGD was found with conventional screen-film system, indicating that the parameters for image acquisition with digital systems are not optimized. It was also observed that the institutions with digital systems use lower breast compression values than the conventional. (author)

  6. Evaluation of the capacity of heavy metal adsorption in exfoliated vermiculite; Avaliacao da capacidade de adsorcao de metal pesado em vermiculitas esfoliadas

    Energy Technology Data Exchange (ETDEWEB)

    Lima, J.F.; Silva, P.S.; Hanken, R.B.L. [Universidade Federal de Campina Grande (UAEMa/UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais; Raposo, C.M.O., E-mail: raposo@dmg.ufcg.edu.b [Universidade Federal de Campina Grande (UAMG/UFCG), Bodocongo, PB (Brazil). Unidade Academica de Mineracao e Geologia

    2009-07-01

    Many groups from modern society have seen with attention the issues of pollutants, generally present in nature, those same that have caused irreversible damages to the environment. The Vermiculite, a phyllosilicate, with t-o-t structure, have high interlamelar charge, has been studied as cationic exchanger, whose application when exfoliated, are increased. This work has the objective of evaluate the absorption capacity of chromium (III), in different concentrations, in high, slim and medium concentrations of exfoliated vermiculites. The results obtained from the characterization by spectroscopy in infrared and by diffraction of x-ray from prepared solids showed important variations in the quantity of adsorbed metal in order the size of the concentrated particles. (author)

  7. Evaluation of the contribution of contamination of radiotherapy room surfaces in the measure of exposure rate of radioiodine therapy patients; Avaliacao da contribuicao da contaminacao de superficies do quarto terapeutico na medida da taxa de exposicao de pacientes de radioiodoterapia

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Rafael Ferreira

    2015-07-01

    The contamination of radiotherapy room surfaces is significant and the measures of patient exposure rate are held on the fourth dependencies, relevant questions are raised: the background radiation of the room stay high due to surface contamination, may interfere with the rate of patient exposure at the time of its release? The monitoring site is important to determine whether the patient will be released? The value of the deal activity and the clinical condition of the patient may increase the contamination, influencing the monitoring results? This paper aims to conduct a quantitative analysis of surface contamination of the contribution of therapeutic room at the time is monitored exposure rate from inpatient. Measurements were made regarding the hospitalization of 32 patients with different doses administered activity, age and of both genders. The measurements were performed in the therapeutic rooms at the hospital Brotherhood Santa Casa de Misericordia de Sao Paulo. Exposure rate measurements were performed at the center of the room at 1 meter of the patient on the day of its release. After his release and prior to decontamination, measurements were performed at predetermined landmarks within the therapeutic room. The results revealed that on average background radiation, high due to surface contamination contributes only 2% of the patient dose rate. It can be considered that even with influence of contamination of surfaces, this is insignificant to determine if the patient may or may not be released. This study suggests that the site in which monitoring occurs exposure rate of the patient should not be decisive for liberation thereof. (author)

  8. Toxicity assays applied for evaluation of ionizing radiation and zeolites adsorption as treatment technologies for coloured effluent; Aplicacao de ensaios de toxicidade na avaliacao da eficiencia da radiacao ionizante e da adsorcao em zeolitas para o tratamento de efluentes coloridos

    Energy Technology Data Exchange (ETDEWEB)

    Higa, Marcela Cantelli

    2008-07-01

    Textile industry is one raising commercial activity in Brazil. This activity has been generating important environmental interferences such as colour and bad biological effects into aquatic environment. Liquid textile effluents are toxic to lived organisms and may present low biological degradability. Although foreseen at federal regulation, the effluent quality is not controlled by toxicity assays in the country. These assays are carried out to determine the potential effects of chemical substances and effluents to cause negative effects to the exposed organisms. The present work aimed whole toxicity evaluation as well as the applicability of two different treatment techniques: ionizing radiation and zeolite adsorption. The efficacy of them were evaluated using eco toxicity bases and real effluents. Two different industries from Sao Paulo State contributed to this project supplying their real effluents. The samples were collected at a Textile Industry and at a Chemical Industry (dying producer) and after the measurement of whole toxicity the samples were submitted to treatments. Toxicity assays were carried out for Daphnia similis and for Vibrio fischeri. Sample irradiations were performed at an Electron Beam Accelerator at CTR/IPEN. Zeolites treatment is an P and D activity from CQMA/IPEN which contributed to this Project. Zeolites v/ere prepared from fly ash previously being used as an adsorber material. Both treatments (electron irradiation and zeolite adsorption) resulted on important toxicity and colour reduction. Concerning irradiation the effluents from chemical industry required higher radiation doses than that from textile activity. The radiation dose to be suggested is 40 kGy (toxicity reduction > 60%) for the chemical effluents and 0.5 kGy for the textile effluents (toxicity reduction > 90%). When zeolite adsorption was evaluated the Z1M6 resulted in 85%o v/hole toxicity reduction and ZC6 resulted in very low efficiency for the effluents of chemical industry. (author)

  9. Evaluation of the fuel rod integrity in PWR reactors from the spectrometric analysis of the primary coolant; Avaliacao da integridade de varetas combustiveis em reatores PWR a partir da analise espectrometrica da agua do primario

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Iara Arraes

    1999-02-15

    The main objective of this thesis is to provide a better comprehension of the phenomena involved in the transport of fission products, from the fuel rod to the coolant of a PWR reactor. To achieve this purpose, several steps were followed. Firstly, it was presented a description of the fuel elements and the main mechanisms of fuel rod failure, indicating the most important nuclides and their transport mechanisms. Secondly, taking both the kinetic and diffusion models for the transport of fission products as a basis, a simple analytical and semi-empirical model was developed. This model was also based on theoretical considerations and measurements of coolant's activity, according to internationally adopted methodologies. Several factors are considered in the modelling procedures: intrinsic factors to the reactor itself, factors which depend on the reactor's operational mode, isotope characteristic factors, and factors which depend on the type of rod failure. The model was applied for different reactor's operational parameters in the presence of failed rods. The main conclusions drawn from the analysis of the model's output are relative to the variation on the coolant's water activity with the fuel burnup, the linear operation power and the primary purification rate and to the different behaviour of iodine and noble gases. The model was saturated from a certain failure size and showed to be unable to distinguish between a single big fail and many small ones. (author)

  10. The Brazilian electric power industry restructuring: an evaluation of the competition through the contestable market theory; A reestruturacao da industria de energia eletrica brasileira: uma avaliacao da competicao atraves da teoria de mercados contestaveis

    Energy Technology Data Exchange (ETDEWEB)

    Vinhaes, Elbia [Santa Catarina Univ., Florianopolis, SC (Brazil). Nucleo de Estudos em Economia Industrial e de Tecnologia]. E-mail: vinhaes@cse.ufsc.br; Santana, Edvaldo de [Santa Catarina Univ., Florianopolis, SC (Brazil). Dept. de Economia

    1999-07-01

    The central issue of debate was the need to align the energy sector's options and organization with changing global patterns of economic and social development, characterized by the increasing role played by the private sector, greater integration in the world economy, and new economic and social priorities such as efficiency, decentralization, deregulation, and a closer attention to environmental issues. The aim of the work is to evaluate the competition in the Brazilian electric power industry through the Contestable Market Theory proposed by Baumol.

  11. Indicadores bioquímicos e hormonais de casos naturais de toxemia da prenhez em ovelhas

    Directory of Open Access Journals (Sweden)

    Fábio C.O. Santos

    2011-11-01

    Full Text Available Toxemia da prenhez é considerada um transtorno metabólico de grande impacto econômico na produção de ovinos, porém as particularidades de repercussão sistêmicas deste distúrbio ainda são pouco esclarecedoras. O presente estudo teve por objetivo avaliar o perfil bioquímico e hormonal de 77 ovelhas com diagnóstico clínico de toxemia da penhez e comparar os achados laboratoriais de acordo com a resolução clínica dos animais, alta hospitalar (G1 e aqueles que morreram (G2. A manifestação clinica da doença foi observada no período do pré-parto em 100% dos animais, destes 66,2 % (n=51 receberam alta clínica e 33,8% (n=26 morreram. Dos casos de toxemia da prenhez estudados havia gestação múltipla em 55,8%. Dentre os parâmetros estudados, cortisol, uréia, AST e CK estavam mais elevados no G2 em relação ao G1 com diferenças significativas (P0,05. Não ocorreram alterações nas taxas de colesterol e triglicerídios. Houve redução nos índices da insulina, não havendo diferenças entre G1 e G2 (P>0,05. Todas as ovelhas apresentaram cetonúria e acidúria.

  12. Breast cancer only detected at US. Incidental finding or clinical evidence?; Le neoplasie mammarie visualizzabili solo con esame ecografico. Reperti incidentali o realta' clinica?

    Energy Technology Data Exchange (ETDEWEB)

    Nori, J.; Masi, A.; Boeri, C.; Vivian, A.; Nori Bufalini, F. [Azienda Ospedaliera Careggi, Florence (Italy). Unita' Operativa di Radiodiagnostica 2; Cariti, G. [Florence Univ., Florence (Italy). Dipt. di Ginecologia e Ostetricia

    2000-06-01

    orientativi per patologia neoplastica della mammella hanno eseguito esame clinico, mammografia, ecografia mammaria, prelievo microistologico ecoguidato e intervento operatorio. Quattordici neoplasie mammarie, con dimensioni comprese tra 7 e 15 mm sono state evidenziate solo ecograficamente. La mammografia eseguita nelle 2 o 3 incidenze abituali, e' risultata sempre negativa. Le lesioni neoplastiche evidenziate solamente con l'esame ecografico (10% di tutti i carcinomi) sono state caratterizzate con biopsia istologica con ago da 14G e definitivamente confermate con intervento chirurgico. I risultati ottenuti permettono di suggerire che l'esame ecografico debba essere metodica da includere nell'iter diagnostico nelle donne con mammelle scarsamente leggibili. Le lesioni nodulari ipoecogene sospette rilevate all'esame ecografico in una donna con visita e mammografia negative meritano di essere ulteriormente approfondite (controllo con ecografia, agoaspirazione per citologia o biopsia istologica con ago) al fine di ottenere la definitiva caratterizzazione.

  13. Toxina botulínica no tratamento da dor Toxina botulínica en el tratamiento del dolor Botulinum toxin in pain treatment

    OpenAIRE

    Orlando Carlos Gomes Colhado; Marcelo Boeing; Luciano Bornia Ortega

    2009-01-01

    JUSTIFICATIVA E OBJETIVOS: A toxina botulínica (TxB), uma das mais potentes toxinas bacterianas conhecidas, tem reconhecidamente ação terapêutica eficaz no tratamento de algumas síndromes dolorosas. Entretanto, algumas de suas indicações ainda estão em fase de comprovação com relação a sua eficácia. O objetivo deste estudo foi revisar o histórico, propriedades farmacológicas e aplicações clinicas da TxB, quando empregada no tratamento de dores de diferentes origens. CONTEÚDO: A TxB é o produt...

  14. ARTROPLASTIA CAPSULAR DE COLONNA MODIFICADA PARA CÃES: ADAPTAÇÃO AO TRATAMENTO DA DISPLASIA E LUXAÇÃO COXOFEMORAL

    Directory of Open Access Journals (Sweden)

    Juan Thomas Wheeler

    1991-08-01

    Full Text Available RESUMO A técnica de artroplastia capsular de Colonna padronizada para cães por WHEELER et al (1991 foi adaptada em 10 cães: cinco portadores de displasia, quatro de luxação e um com displasia e luxação coxofemoral. No pré e pós-operatório os animais foram avaliados clinica e radiologicamente. Um deles foi sacrificado e submetido a estudo anátomo e histopatológico. A técnica adotada proporcionou alívio da dor. A recuperação funcional foi excelente em 50% dos casos e boa nos demais.

  15. O cuidado de enfermagem em saúde mental na perspectiva da clínica do sujeito : questões de fineza

    OpenAIRE

    Teresa Cristina da Silva Kurimoto

    2013-01-01

    Resumo: O cuidado de enfermagem na área da Saúde Mental no Brasil vem, nas últimas décadas, passando por transformações. A constituição de uma rede de serviços de saúde mental de base comunitária, organizada a partir de concepções próprias Ao Modo Psicossocial, favoreceu o nascimento e disseminação de práticas de enfermagem orientadas por princípios teóricos alinhados com a chamada clinica do sujeito. Algumas elaborações teóricas iniciais vem se ocupando dessas questões, mas lacunas permanece...

  16. Avaliação da satisfação das puérperas nos cuidados de saúde no parto

    OpenAIRE

    Marques, Andreia Pereira Santos

    2012-01-01

    O presente trabalho propôs-se avaliar a satisfação das utentes relativamente aos cuidados de saúde prestados no parto. Esta avaliação pretendeu aferir o nível de satisfação global e a sua discriminação em relação a diferentes aspetos de funcionamento da organização geral do serviço, do atendimento e dos cuidados de saúde prestados procurando-se ainda identificar em que medida algumas variáveis sociodemográficas, obstétricas e clinicas podem influenciar positiva ou negativamente essa satisfaçã...

  17. Estudo clínico da aplicação de peptídeo sintético de adesão celular (PepGen-P15®) em lesões periodontais graves de cães

    OpenAIRE

    2005-01-01

    Este estudo teve como objetivo avaliar clinica e radiograficamente a resposta de dentes com perda do nível clínico de inserção (NCI), bolsa periodontal, retração gengival e exposição de furca graus II e III após três e seis meses da intervenção cirúrgica de implante com um peptídeo sintético de adesão celular (PepGen P-15®). Vinte e um cães apresentados ao atendimento do Hospital Veterinário da FMVZ-USP foram anestesiados para tratamento periodontal e um total de 91 faces de dentes com pe...

  18. Análise de prescrições destinadas ao emagrecimento em farmácia magistral antes e após a vigência da RDC Nº 52/2011

    Directory of Open Access Journals (Sweden)

    Hanan JUMAH EID AHMAH LAILA

    2013-12-01

    Full Text Available O objetivo deste estudo foi avaliar o perfil de prescrições destinadas ao emagrecimento em uma farmácia de manipulação no município de Pelotas – RS, antes e após a vigência da RDC nº 52/2011. Para isso, foram analisados todos os receituários de controle especial contendo medicamentos anorexígenos entre os meses de janeiro a dezembro de 2010 e 2012. Os resultados obtidos demonstraram que o sexo feminino continua sendo o gênero que mais consome esses medicamentos tanto em 2010 quanto em 2012. No ano de 2010, os anorexígenos mais prescritos foram respectivamente anfepramona (68,7%, femproporex (26,2%, mazindol (2,7% e sibutramina (2,4%, sendo os médicos da especialidade Clinica Geral aqueles que mais prescreveram em ambos os períodos avaliados.. Em 2012, foi observado um considerável aumento da prescrição de medicamento contendo o fármaco sibutramina. Entretanto, a vigência da RDC nº 52/2011 foi eficaz ao promover a redução da prescrição de anorexígenos e verifica-se a importância de Atos Regulatórios por parte das autoridades sanitárias, normatizando o uso racional de medicamentos.

  19. Mastite clinica caprina causada por Arcanobacterium pyogenes

    OpenAIRE

    Garino Jr,F.; R.A.T. Matos; Miranda Neto,E.G; Bernardino,J.N.N.; Santos,E.D.; Aguiar,G.M.N.

    2012-01-01

    This paper reports the occurrence of goat mastitis due to Arcanobacterium pyogenes in Paraiba State - Brazil. The diagnosis was confirmed by clinical symptoms and microbiological culture. Amastectomywasperformedasclinical treatment.

  20. Clinica use of platelet additive solutions.

    Science.gov (United States)

    van Rhenen, Dick J

    2007-12-01

    Randomised clinical trial (RCT) to study the clinical efficacy and safety of new platelet products using platelet additive solutions are scarce. In this paper a number of recent RCT's is discussed. It can be the start of a development where new transfusion products enter a RCT before the product is applied in clinical practice.

  1. La huída en la obra de Mario Vargas Llosa

    Directory of Open Access Journals (Sweden)

    German Arce Ross

    Full Text Available Se trata de poner en perspectiva la mayor parte de novelas de Mario Vargas Llosa en función del tema de la huída, partiendo del hecho que é1 solicitó la nacionalidad Española inmediatamente después de haber perdido las elecciones para la Presidencia del Perú y de haber escrito El pez en el agua. Nuestro análisis intenta demostrar la importancia de la figura paterna – principalmente en el sentido de su ausencia y de sus bruscas reapariciones – en la cristalización sintomática del tema de la fuga. Es por eso que una analogía con la posición fóbica, en relación al padre o a sus substitutos, nos ha parecido pertinente. Teniendo como pivot el análisis de la forma, del contexto y del contenido de su libro de memorias, este trabajo definiría así las bases de una contribución literaria de la obra de Vargas Llosa a la clinica de la fobia.

  2. Evaluation of radiological protection and dose of skin entrance in paediatric dentistry examinations; Avaliacao da protecao radiologica e da dose de entrada na pele em exames de odontologia pediatrica

    Energy Technology Data Exchange (ETDEWEB)

    Khoury, Helen Jamil [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Vasconcelos, Flavia Maria Nassar de [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Silveira, Marcia Maria Fonseca da [Universidade de Pernambuco (UPE), Recife, PE (Brazil). Fac. de Odontologia; Couto, Geraldo Bosco Lindoso [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Fac. de Odontopediatria; Brasileiro, Izabela Vanderley

    2005-07-01

    In this work the radiological protection conditions and dose at the entrance of pediatric patients undergoing dental intraoral radiographs were evaluated. The study was conducted in two clinics of the dentistry course at the Federal University of Pernambuco, Recife, PB, Brazil, equipped with conventional X-ray apparatus, with 60 and 70 kV. 254 exams of 113 patients between the ages of 3 to 12 years were evaluated. The skin entrance dose was estimated using TLD-100 thermoluminescent dosemeters. During the examination were also recorded information regarding the time of exposure, radiographic technique used, use of thyroid protectors and lead apron, angle and distance of the cone Locator to the patient's skin. The results showed that the input skin doses ranged from 0.3 mGy to 10mGy. The lead apron was used in 71% of exams while the thyroid shield was only used in 58% of the exams. The exposure times ranged from 0,5s to 1,5s. From the results it can be concluded that the radiological procedures are not optimized and that in some cases the patient dose is high.

  3. Evaluation of the radioprotection state-of-the-art for nursing mothers and the recommendation for multidisciplinary teams; Avaliacao do estado da arte da radioprotecao para lactantes e elaboracao de recomendacoes para equipes multidisciplinares

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Liliane dos; Oliveira, Silvia M. Velasques de, E-mail: lirio@ird.gov.b, E-mail: silvia@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    Related to the ionizing radiation exposure, the breast feed babies can be classified as individuals occupational y exposed and public individuals existing dose limits, and nonexisting limits. breast feeds are always considered as public individuals, independently of the category which women are classified. The contamination can occur by ingestion of mother warm milk on the cases of accidents involving mothers occupational y exposed, intake of radionuclides by inhalation, or ingestion, or when the mother are submitted to diagnostic procedures or therapeutics with radiopharmaceuticals, that can reach high concentrations in the milk which can cause significant absorbed doses for the children organs. Besides the internal dose, the close contact between the mother and the baby results in external doses. In Brazil, round 7 % of the diagnostic procedures use {sup 131}I or {sup 123}I, and 84 % are carry out by women. For {sup 131}I, {sup 67}Ga and {sup 201}Tl, it is necessary the definitive interruption of the breast feeding. This work proposes a study on the risk of children and babies breast feed in the country. A questionnaire was developed to be applied to interviews with doctors and nurses on public and private nuclear medicine services, for the evaluation of the procedures used with young women. After that, will be developed a brochure for multidisciplinary teams, presenting the basic concepts on internal dosimetry of the children and babies, allowing the precise prediction of interruption time of the maternal breast feed and, when applicable, the alternative methods for that period

  4. Dosimetric evaluation of spectrophotometric response of alanine gel solution for gamma, photons, electrons and thermal neutrons radiations; Avaliacao dosimetrica da resposta espectrofotometrica da solucao gel de alanina para radiacao gama, de fotons, de eletrons e de neutrons termicos

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Cleber Feijo

    2009-07-01

    Alanine Gel Dosimeter is a new gel material developed at IPEN that presents significant improvement on Alanine system developed by Costa. The DL-Alanine (C{sub 3}H{sub 7}NO{sub 2}) is an amino acid tissue equivalent that improves the production of ferric ions in the solution. This work aims to analyse the main dosimetric characteristics this new gel material for future application to measure dose distribution. The performance of Alanine gel solution was evaluated to gamma, photons, electrons and thermal neutrons radiations using the spectrophotometry technique. According to the obtained results for the different studied radiation types, the reproducibility intra-batches and inter-batches is better than 4% and 5%, respectively. The dose response presents a linear behavior in the studied dose range. The response dependence as a function of dose rate and incident energy is better 2% and 3%, respectively. The lower detectable dose is 0.1 Gy. The obtained results indicate that the Alanine gel dosimeter presents good performance and can be useful as an alternative dosimeter in the radiotherapy area, using MRI technique for tridimensional dose distribution evaluation. (author)

  5. Assessment of {sup 222}Rn occupational exposure at IPEN nuclear materials storage site, SP, Brazil; Avaliacao da exposicao ocupacional ao {sup 222}Rn no galpao da Salvaguardas do IPEN, SP

    Energy Technology Data Exchange (ETDEWEB)

    Caccuri, Lilian Saueia

    2007-07-01

    In this study it was assessed the occupational exposure to {sup 222}Rn at IPEN, SP, Brazil, nuclear materials storage site through the committed effective dose received by workers exposed to this radionuclide. The radiation dose was calculated through the radon concentrations at nuclear materials storage site. Radon concentrations were determined by passive detection method with solid state nuclear detectors (SSNTD). The SSNTD used in this study was the polycarbonate Makrofol E; each detector is a small square plastic of 1 cm{sup 2}, placed into a diffusion chamber type KFK. It was monitored 14 points at nuclear materials storage site and one external point, over a period of 21 months, changing the detectors every three months, from December 2004 to September 2006. The {sup 222}Rn concentrations varied from 196 {+-} 9 and 2048 {+-} 81 Bq{center_dot}m{sup -3}. The committed effective dose due to radon inhalation at IPEN nuclear materials storage site was obtained from radon activity incorporated and dose conversion factor, according to International Commission on Radiological Protection procedures. The effective committed dose received by workers is below 20 mSv{center_dot}y{sup -1}. This value is suggested as an annual effective dose limit for occupational exposure by ICRP 60. (author)

  6. Social environmental and economic evaluation diagnosis through application of MADSA (Social and Environmental Evaluation Matrix) customization; Diagnostico de desempenho socioambiental e economico por meio da customizacao da MADSA (Matriz para Avaliacao de Desempenho Socioambiental)

    Energy Technology Data Exchange (ETDEWEB)

    Ziliotto, Marco Aurelio B.; Villa, Alessandra T.; Padilha, Simone L. Vieira; Canaverde, Patricia Margue [Instituto ECOPLAN, General Carneiro, PR (Brazil); Sanqueta, Carlos Roberto [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil)

    2004-07-01

    The present paper reports a social, environment and economic diagnosis in an oil and energy organization, in the enlargement of its plant. Attending to some previous requirements made by this company, the diagnosis was accomplished making use of an innovative evaluation tool called MADSA{sup R} (Social and Environmental Evaluation Matrix). Through the customization of this tool, it was possible to evaluate, systematically, the performance of the engaged companies hired by the organization to implement its enterprise, based on proposed actions in QSMS - Quality, Safety, Environment and Health. The performance evaluation was supported by the employees', the organization, its clients' and the local community perception. MADSA{sup R} methodology made it possible to measure the accomplished gain through proposed actions. The development of a performance indicator allowed the comparison between achieved results and accomplished investments. It was concluded that MADSA{sup R} provided subsidies to elaborate an action plan to improve the organization achievements, since it was able to represent the strategy of the organization, to guide and standardize actions, to identify and quantify points to be made better of. (author)

  7. Evaluation of image quality versus doses in service of mammography of Belo Horizonte, MG, BR; Avaliacao da qualidade da imagem versus doses em servicos de mamografia de Belo Horizonte

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, M.; Nogueira, M.S.; Guedes, E. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil). Seguranca Nuclear; Andrade, M.C. [Superintendencia Estadual de Vigilancia Sanitaria, Belo Horizonte, MG (Brazil); Peixoto, J.E. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Medicina. Radiologia; Silva, V.L.S.; Borges, J.C. [Vigilancia Sanitaria da Secretaria Municipal de Saude de Belo horizonte (VISA/PBH), MG (Brazil)

    2004-07-01

    Cancer is the second cause of death for Brazilian women and breast cancer is the most common neoplasm amongst women. Mammography is an essential tool for diagnosis and early detection of this disease. In order to be effective, the mammography must be of good quality. This study sought to evaluate the radiation protection and quality of 37 services out a total of 82 mammography facilities existing in the city of Belo Horizonte, Brazil. Two instruments were used: a proposed evaluation protocol of the Health Surveillance -VISA and a protocol for evaluation of image quality. Of the 37 services who completed the study, none was achieved 100% conformity in image quality. The results of radiation protection requirements according to the VISA protocol bore close relation to final image quality, a central issue for early cancer detection (p>0.05)

  8. Study of the contribution of the different components of atmospheric cosmic radiation in dose received by the aircraft crew; Avaliacao da contribuicao dos diferentes componentes da radiacao cosmica atmosferica na dose em tripulacoes de aeronaves

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Marlon A.; Prado, Adriane C.M., E-mail: adriane.acm@hotmail.com, E-mail: marlon@ieav.cta.br [Instituto Tecnologico de Aeronautica (ITA/DCTA), Sao Jose dos Campos, SP (Brazil); Federico, Claudio A.; Goncalez, Odair L., E-mail: claudiofederico@ieav.cta.br, E-mail: odairl@ieav.cta.br [Instituto de Estudos Avancados (IEAv/DCTA), Sao Jose dos Campos, SP (Brazil)

    2014-07-01

    The crews and aircraft passengers are exposed to atmospheric cosmic radiation. The flow of this radiation is modulated by the solar cycle and space weather, varying with the geomagnetic latitude and altitude. This paper presents a study of the contributions of radiation in total ambient dose equivalent of the crews depending on flight altitude up to 20 km, during maximum and minimum solar and in equatorial and polar regions. The results of calculations of the particle flows generated by the EXPACS and QARM codes are used. The particles evaluated that contributing significantly in the ambient dose equivalent are neutrons, protons, electrons, positrons, alphas, photons, muons and charged pions. This review allows us to characterize the origin of the dose received by crews and also support a project of a dosimetric system suitable for this ionizing radiation field in aircraft and on the ground.

  9. Evaluating the influence of the aluminum purity at mammographic HVL procedures;Avaliacao da influencia do teor de pureza do aluminio nos resultados do teste da camada semi-redutora em mamografia

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Paulo R.C. [Fisica Medica Servicos e Consultoria Tecnica S/C, Sao Paulo, SP (Brazil); Costa, Paulo R. [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Fisica; Furquim, Tania A.C. [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia

    2009-07-01

    This paper intends to evaluate the influence of the Aluminum's purity over the mammographic HVL procedures. It was measured the HVL of a GE Senographe 700 T using 7 groups of commercial filters, and its purity and thickness were determined. As the results shows, the first HVL inherent procedure's uncertainty is about 3%; the best local prototype's deviation over the worst commercial device is about 5%; and, according to the procedure's uncertainty, as to the commercial device's response variability, it may be possible using local Al filters, although it is necessary to extend this study over more equipment in order to set up a correction factor, which was found to be about 5% to 8% over Al filters about 99% purity, on this study. (author)

  10. Evaluation of {sup 137}Cs mobility in soil profiles from the Pantanal region, Brazil; Avaliacao da mobilidade do {sup 137}Cs em perfis de solos da regiao do Pantanal

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Fernanda Leite da

    2013-07-01

    Radioactive pollutants can cause impact on the environmental quality of soils and pose a risk to human health. The release of radioactive materials through nuclear testing or nuclear accidents cause the deposition of radionuclides on the ground,· it may be leached by rain, transported to the sources of natural waters and absorbed by the soil fauna and flora, and thus enter the human food chain. Radioecological studies have shown that soils with low pH, low organic matter content and low fertility are more vulnerable to contamination by {sup 137}Cs, since the transfer to plants is high. In this study, we aimed to assess and map the vulnerability to contamination by {sup 137}Cs surface horizons of the soils from the Pantanal and propose mitigation measures adapted to the regional scenario to optimize radiological protection of agricultural areas. Therefore, selected soil profiles located in the municipality of Jaraguari, state of Mato Grosso do Sul, and applied the conceptual model developed by Picanco Jr (2012), which was used in the reference values of the factor of soil-plant transfer (FT) for {sup 137}Cs in corn, related soil variables (pH, CTC and exchangeable K) and relevance of parameters and variations of amplitudes for each value range of FT. The application of this conceptual model established to detect the vulnerability of soils to radioactive contamination generated maps vulnerability showing that the region is very heterogeneous as this criterion, showing low levels of vulnerability for most of the region and in some areas, extreme vulnerability. This result identified the Pantanal as one of the less vulnerable to the radioactive contamination, but the sparse areas of extreme vulnerability can lead to contamination of subsoil and a significant spread of contamination via groundwater. This conceptual model, which defines vulnerability classification, is a first step for the study and determination of a numerical index of vulnerability to {sup 137}Cs soil and can be used in the task of remediation in case of rural areas by accident and {sup 137}Cs contamination establishing geographic areas where we should prioritize treatment due to a greater vulnerability. (author)

  11. Evaluation of variation of voltage (kV) absorbed dose in chest CT scans; Avaliacao da variacao da tensao (kV) na dose absorvida em varreduras de TC torax

    Energy Technology Data Exchange (ETDEWEB)

    Mendonca, Bruna G.A.; Mourao, Arnaldo P., E-mail: brunabgam@gmail.com [Centro Federal de Educacao Tecnologica de Minas Gerais (CENEB/CEFET-MG), Belo Horionte, MG, (Brazil)

    2013-07-01

    Computed tomography (CT) is one of the most important diagnostic techniques images today. The increasing utilization of CT implies a significant increase of population exposure to ionizing radiation. Optimization of practice aims to reduce doses to patients because the image quality is directly related to the diagnosis. You can decrease the amount of dose to the patient, and maintain the quality of the image. There are several parameters that can be manipulated in a CT scan and these parameters can be used to reduce the energy deposited in the patient. Based on this, we analyzed the variation of dose deposited in the lungs, breasts and thyroid, by varying the supply voltage of the tube. Scans of the thorax were performed following the protocol of routine chest with constant and variable current for the same applied voltage. Moreover, a female phantom was used and thermoluminescent dosimeters (TLD-100), model bat, were used to record the specific organ doses. Scans were performed on a GE CT scanner, model 64 Discovery channels. Higher doses were recorded for the voltage of 120 kV with 200 mAs in the lungs (22.46 mGy) and thyroid (32.22 mGy). For scans with automatic mAs, variable between 100 and 440, this same tension contributed to the higher doses. The best examination in terms of the dose that was used with automatic 80 kV mAs, whose lungs and thyroid received lower dose. For the best breast exam was 100 kV. Since the increase in the 80 kV to 100 kV no impact so much the dose deposited in the lungs, it can be concluded that lowering the applied voltage to 100 kV resulted in a reduction in the dose absorbed by the patient. These results can contribute to optimizing scans of the chest computed tomography.

  12. Appraisal of oil-water separation in field by injection of demulsifier through gas-lift line; Avaliacao da separacao agua-oleo em campo injetando desemulsificante atraves da linha de gas-lift

    Energy Technology Data Exchange (ETDEWEB)

    Ramalho, Joao Batista Vianey da Silva [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas. Setor de Pesquisa, Desenvolvimento e Engenharia]. E-mail: jramalho@cenpes.petrobras.com.br

    2001-12-01

    During the petroleum dehydrating process, the use of demulsifiers is fundamental in the coalescing of emulsions formed in field from the produced petroleum and water. Injection of demulsifiers should be performed the most upstream possible of the processing plant, not only to allow better product performance but to avoid the formation of smaller water drops, due to shearing during flowing of production. Herein presented are the test results of the d emulsifier's performances in field, injected through the gas-lift line of petroleum producing wells. The results showed water removal in the three-phase separator, even when operating in low processing temperature and low liquid residence time inside vessel. (author)

  13. Evaluation of sensitivity evaluation of a contamination monitor for use in monitoring of internal exposure of workers in nuclear medicine; Avaliacao da sensibilidade de um monitor de contaminacao para aplicacao em monitoracao da exposicao interna de trabalhadores em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Dantas, Bernando Maranhao; Assis, Janima Cruz de; Oliveira, Salomao Marques de; Dantas, Ana Leticia Almeida, E-mail: bmdantas@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. de Monitoracao In Vivo. Div. de Dosimetria

    2014-07-01

    In practice of nuclear medicine, expert personnel routinely handle radiopharmaceuticals for diagnosis and radiotherapy. The control of intakes of radionuclides by workers can be performed through internal dosimetry techniques, as an integral part of the radiation protection program of the installation. The use of radiopharmaceuticals for diagnostic and therapeutic purposes in vivo and in vitro in Brazil is regulated by CNEN-NE Standards and 3:05 CNEN-NN 3.01. The International Atomic Energy Agency (IAEA) recommends the establishment of an internal monitoring program on workers, especially those subject to possible exposure to annual effective doses greater than 1 mSv. Note that, currently, in Brazil, are not available qualified laboratories to provide internal monitoring services in all regions in the country, if it were applied by CNEN, the requirement for internal monitoring of workers. This paper presents the development of a simple and low-cost methodology for in vivo monitoring of {sup 131}I in the thyroid. The proposed methodology is the use of portable monitor of surface contamination, equipment available and routinely used in all nuclear medicine services in Brazil. The monitor is calibrated with neck-thyroid simulator developed at the Laboratory of In Vivo Monitoring of IRD/CNEN-RJ. The equipment tested is suitable for application in in vivo occupational monitoring thyroid. This conclusion is based on the fact that the detection system has sufficient sensitivity for monitoring up to seven days after the incorporation of the radionuclide and guarantees {sup 131}I detection in values that result in effective doses below 1 mSv for the exposure scenarios adopted.

  14. Evaluation of internal occupational exposure of workers from nuclear medicine services by aerosol analysis containing {sup 131}I; Avaliacao da exposicao interna de trabalhadores em servicos de medicina nuclear atraves da analise de aerossois contendo {sup 131}I

    Energy Technology Data Exchange (ETDEWEB)

    Carneiro, Luana Gomes; Sampaio, Camilla da Silva; Dantas, Ana Leticia Almeida; Lucena, Eder Augusto; Santos, Maristela Souza; Dantas, Bernardo Maranhao, E-mail: carneiro@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ),Rio de Janeiro, RJ (Brazil); Paula, Gustavo Affonso de [Escola SESC de Ensino Medio, Rio de Janeiro, RJ (Brazil)

    2014-07-01

    This study evaluated the risk of internal occupational exposure associated with the incorporation of {sup 131}I via inhalation, in Nuclear Medicine Services, using aerosol analysis techniques. Occupationally Exposed Individuals (IOE) involved in handling this radionuclide are subject to chronic exposure, which can lead to an increase in the committed effective dose. Results obtained in preliminary studies indicate the occurrence of incorporation of {sup 131}I by workers involved in handling solutions for radioiodine therapy procedures. The evaluation was carried out in radiopharmacy lab (nuclear medicine service) of a public hospital located in the city of Rio de Janeiro. After confirmed the presence of the radioisotope, by a qualitative assessment, it was determined an experimental arrangement for sample collection and were detected and quantitated the presence of steam {sup 131}I during routine work. The average concentration of activity obtained in this study was 3 Bq / m{sup 3}. This value is below of Derived Concentration in Air (DCA) of 8.4 x 10{sup 3} Bq of {sup 131}I / m{sup 3} corresponding to a committed effective dose of 1.76 x 10{sup -4} mSv. These results demonstrate that the studied area is safe in terms of internal exposure of workers. However, the presence of {sup 131}I should be periodically reevaluated, since this type of exposure contributes to the increase of the individual effective doses. Based on the data obtained improvements were suggested in the exhaust system and the use of good work practices in order to optimize the exposures.

  15. Relatorio Final Sobre o Ensino Bilingue: Resultados da Avaliacao Externa da Experiencia de Escolarizacao Bilingue em Mocambique (PEBIMO) (Final Report on Bilingual Education: Results of External Evaluation of an Experiment in Bilingual Education in Mozambique).

    Science.gov (United States)

    Benson, Carolyn J.

    The PEBIMO project was designed to determine whether bilingual education could improve the quality of primary education in Mozambique, recognizing that Portuguese is not the native language of the majority of Mozambican students. The project began in 1992 with 8 cohorts of first grade in 2 provinces; during this investigation, students were in…

  16. Evaluation of toxicity and removal of color in textile effluent treated with electron beam; Avaliacao da toxicidade e remocao da cor de um efluente textil tratado com feixe de eletrons

    Energy Technology Data Exchange (ETDEWEB)

    Morais, Aline Viana de

    2015-07-01

    The textile industry is among the main activities Brazil, being relevant in number of jobs, quantity and diversity of products and mainly by the volume of water used in industrial processes and effluent generation. These effluents are complex mixtures which are characterized by the presence of dyes, surfactants, metal sequestering agents, salts and other potentially toxic chemicals for the aquatic biota. Considering the lack of adequate waste management to these treatments, new technologies are essential in highlighting the advanced oxidation processes such as ionizing radiation electron beam. This study includes the preparation of a standard textile effluent chemical laboratory and its treatment by electron beam from electron accelerator in order to reduce the toxicity and intense staining resulting from Cl. Blue 222 dye. The treatment caused a reduction in toxicity to exposed organisms with 34.55% efficiency for the Daphnia similis micro crustacean and 47.83% for Brachionus plicatilis rotifer at a dose of 2.5 kGy. The Vibrio fischeri bacteria obtained better results after treatment with a dose of 5 kGy showing 57.29% efficiency. Color reduction was greater than 90% at a dose of 2.5 kGy. This experiment has also carried out some preliminary tests on the sensitivity of the D. similis and V. fischeri organisms to exposure of some of the products used in this bleaching and dyeing and two water reuse simulations in new textile processing after the treating the effluent with electron beam. (author)

  17. Model for qualitative evaluation of risk in ducts through the fuzzy logic in conformity with the methodology of IBR; Modelo para avaliacao qualitativa do risco em oleodutos atraves da logica fuzzy segundo a metodologia da IBR

    Energy Technology Data Exchange (ETDEWEB)

    Mishina, Koje Daniel Vasconcelos [Centro Federal de Educacao Tecnologica da Bahia (CEFET-BA), Salvador, BA (Brazil); Silva, Jose Felicio da; Silva, Joao Bosco de Aquino [Universidade Federal da Paraiba (UFPb), Joao Pessoa, PB (Brazil)

    2006-07-01

    This work considers a system for qualitative evaluation of the terrestrial risk in pipelines, based in the methodology of the Inspection Based on Risk and the Fuzzy Logic. For this one developed a matrix of risk associated with the oil transport and its derivatives, that define the type of tracking and the regularity of inspection with Pig Instrumented in function of the level of risk found in the stretch in study. This matrix of risk considers the probabilities and the consequences associates to the damage for corrosion. The evaluation of the considered system was based on the consistency of the found levels of risk, in relation to that it would be found in the practical one. The gotten results had demonstrated that the use of the methodology of the IBR and the Fuzzy Logic can be used jointly as one sufficiently efficient alternative technique in the evaluation of risk in corroded pipe-lines. (author)

  18. Evaluation of the uncertainty for the efficiency curve determination of {sup 210}Pb by liquid scintillation; Avaliacao da incerteza para a curva de eficiencia da determinacao de {sup 210}Pb por cintilacao liquida

    Energy Technology Data Exchange (ETDEWEB)

    Sampaio, C.S.; Sousa, W.O.; Dantas, B.M., E-mail: camilla@ird.gov.br [Instituto de Radioprotecao e Dosimetria, (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2014-07-01

    Methodologies for the evaluation of uncertainties associated with the determination of the efficiency curve of {sup 210}Pb by liquid scintillation counting (LSC) are presented. No statistical difference were found when compared the uncertainties of the curves that represented the counting net before and after the secular equilibrium between {sup 210}Pb and {sup 210}Bi, nether when compared the curves when counting only {sup 210}Pb and the curve with the total count of {sup 210}Pb and {sup 210}Bi, for the same time interval after precipitation. (author)

  19. Assessment of atmospheric pollution of chemical elements by epiphytic lichen analysis at the Campus of the Sao Paulo University; Avaliacao da poluicao atmosferica de elementos quimicos pela analise de liquen epifitico no Campus da Cidade Universitaria de Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Rocha, Rosiana Rocho

    2015-07-01

    Air pollution has been a frequent topic of research, due to the effects that it can cause on the health of living organisms, environment and climate. In order to identify pollution sources and their effects, biomonitoring has been studied due to its low cost and possibility of sampling in wide geographic areas. In this study for passive biomonitoring of air pollution levels at the Cidade Universitaria Armando Salles de Oliveira (CUASO), University of Sao Paulo campus, epiphytic lichens of Canoparmelia texana species were used. The lichens collected from tree barks at different sampling sites in the CUASO were cleaned, freeze-dried and ground for analyses. Lichen samples were analyzed by X - ray fluorescence spectrometry (XRFS) and neutron activation analysis (NAA). For XRFS, cylindrical pellets of samples were prepared to determine As, Br, Ca, Cl, Cr, Cu, Fe, K, Mn, Rb, S, Sr and Zn. For NAA, lichen sample aliquots along with synthetic elemental standards were irradiated both for short and long periods at the IEA-R1 nuclear research reactor. The induced activities were measured by a gamma ray spectrometer to determine As, Br, Ca Cd, Cl, Co, Cr, Cs, Cu, Fe, K, La, Mg, Mn, Rb, Sb, Sc, Se, U, V and Zn. The precision and accuracy of the results were evaluated by the analysis of certified reference materials (MRCs). Their results of relative errors and standard deviations were below 15% for most of the elements. The standardized difference or En score values were lower than |1| indicating satisfactory results. Replicate analyses of a lichen sample by XRFS and NAA, indicated good homogeneity of the sample for the elements determined. The lichen results showed that the mean concentrations of As, Br, Ca, Cd, Co, Cr, Cs, Rb, Sb, Se and U were higher in samples from CUASO than those from regions considered unpolluted. For Fe, K, La, S, V and Zn, they were of the same order of magnitude. The correlation study between the elements showed high correlation (r > 0.7) for elements originated from the natural and anthropogenic sources. The principal component analysis (PCA) applied to the results showed six major components, where components 1 and 2 accounted for 52.9 % of the variance of the data. Enrichment factors (EF) calculated for the results of lichens from CUASO and a region considered unpolluted were EF> 1 for most elements, showing that these elements may be from anthropogenic sources. From the results obtained in this study can be concluded that the elements found in lichens from CUASO can be originated from sources such as resuspension of soil particles and anthropogenic emissions. (author)

  20. Evaluation of oil and grease removal by adsorptive polymeric resins in semi-industrial scale: influence of temperature; Avaliacao da remocao de oleos e graxas por resinas polimericas adsorventes em escala semi-industrial: influencia da temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Luis F.S. de; Silva, Carla M.F. da; Queiros, Yure G.C.; Lucas, Elizabete F. [Universidade Federal do Rio de Janeiro, Instituto de Macromoleculas, Laboratorio de Macromoleculas e Coloides na Industria de Petroleo, Rio de Janeiro, RJ (Brazil)], e-mail: elucas@ima.ufrj.br

    2011-07-01

    The aim of this study was to evaluate the performance of polymeric resins packed in a fixed bed eluted in semi-industrial scale for oil and greases removal disposed in synthetic oily water in different temperature conditions. For this work, columns packed with vinyl and acryl polymer-base were tested and their efficiency of oil removal was evaluated by fluorimetry technique in two different temperatures: 25 and 60 deg C, in a flow rate condition of 200 mL/min. The experimental results were very good: the removal efficiencies were above 98% in both cases. At 60 deg C, the system keep the efficiency for a longer time: no significant loss in the efficiency was observed after eluting 1,000 times of the column bed volume at 25 deg C and 2,000, at 60 deg C. This result characterizes a great potential of application in the industry. (author)

  1. Comparative evaluation of image quality in computed radiology systems using imaging plates with different usage time; Avaliacao comparativa da qualidade da imagem em sistemas de radiologia computadorizada utilizando Imaging Plates com diferentes tempos de uso

    Energy Technology Data Exchange (ETDEWEB)

    Lazzaro, M.V.; Luz, R.M. da; Capaverde, A.S., E-mail: marcos.lazzaro@acad.pucrs.br [Hospital Sao Lucas (PUC-RS), Porto Alegre, RS (Brazil); Silva, A.M. Marques da [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil). Faculdade de Fisica

    2015-04-15

    Computed Radiology (CR) systems use imaging plates (IPs) for latent image acquisition. Taking into account the quality control (QC) of these systems, imaging plates usage time is undetermined. Different recommendations and publications on the subject suggest tests to evaluate these systems. The objective of this study is to compare the image quality of IPs of a CR system, in a mammography service, considering the usage time and consistency of assessments. 8 IPs were used divided into two groups: the first group included 4 IPs with 3 years of use (Group A); the second group consisted of 4 new IPs with no previous exposure (Group B). The tests used to assess the IP's quality were: Uniformity, Differential Signal to Noise Ratio (SDNR), Ghost Effect and Figure of Merit (FOM). Statistical results show that the proposed tests are shown efficient in assessing the conditions of image quality obtained in CR systems in mammography and can be used as determining factors for the replacement of IP's. Moreover, comparing the two sets of IP, results led to the replacement of all the set of IP’s with 3 years of use. This work demonstrates the importance of an efficient quality control, not only with regard to the quality of IP's used, but in the acquisition system as a whole. From this work, these tests will be conducted on an annual basis, already targeting as future work, monitoring the wear of IP's Group B and the creation of a baseline for analysis and future replacements. (author)

  2. Combined discrete nebulization and microextraction process for molybdenum determination by flame atomic absorption spectrometry (FAAS); Avaliacao da combinacao da nebulizacao discreta e processos de microextracao aplicados a determinacao de molibdenio por espectrometria de absorcao atomica com chama (FAAS)

    Energy Technology Data Exchange (ETDEWEB)

    Oviedo, Jenny A.; Jesus, Amanda M.D. de; Fialho, Lucimar L.; Pereira-Filho, Edenir R., E-mail: erpf@ufscar.br [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil). Departamento de Quimica

    2014-04-15

    Simple and sensitive procedures for the extraction/preconcentration of molybdenum based on vortex-assisted solidified floating organic drop microextraction (VA-SFODME) and cloud point combined with flame absorption atomic spectrometry (FAAS) and discrete nebulization were developed. The influence of the discrete nebulization on the sensitivity of the molybdenum preconcentration processes was studied. An injection volume of 200 μ resulted in a lower relative standard deviation with both preconcentration procedures. Enrichment factors of 31 and 67 and limits of detection of 25 and 5 μ L{sup -1} were obtained for cloud point and VA-SFODME, respectively. The developed procedures were applied to the determination of Mo in mineral water and multivitamin samples. (author)

  3. Evaluation of the influence of water and oil derivatives absorption on PVC pipes; Avaliacao da influencia da absorcao de agua e de derivados de petroleo em tubulacoes de PVC

    Energy Technology Data Exchange (ETDEWEB)

    Carpio, D.C.F. del; D' Almeida, J.R.M., E-mail: dalmeida@puc-rio.b [Pontificia Univ. Catolica do Rio de Janeiro (PUC-Rio), RJ (Brazil). Dept. de Engenharia de Materiais

    2010-07-01

    PVC is the only polymer of large consume that is not totally obtained from petroleum, since it contains 57% of chlorine. As chlorine containing materials are resistant to bacteria rich environments, such as buried pipes, PVC is being used for fluid transportation, principally water, but it can also be considered as an alternative material for the transportation of other fluids. This work analyzes the aging behavior of PVC exposed to water, ethanol and diesel oil, using TGA, DSC, FT-IR and DR-X techniques. The results showed that the chemical structure of PVC is not affected by exposure to water and ethanol. For these fluids a dipolar interaction could be occurring, increasing at the beginning of the absorption process, the polymer thermal stability. The diesel oil caused plasticization, with reduction of the Tg since the beginning of the aging process. (author)

  4. Evaluation of the dose absorbed by the thyroid of patients undergoing treatment of Graves disease;Avaliacao da dose absorvida pela tireoide de pacientes submetidos ao tratamento da doenca de Graves

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Tiago L.; Filho, Joao A. [Universidade Catolica de Pernambuco (UNICAP), Recife, PE (Brazil). Dept. de Fisica; Silva, Jose M.F. da [Universidade Federal de Pernambuco (DEN/UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear

    2009-07-01

    The radioiodine is used as complementary treatment of thyroid cancer and as first choice for the treatment of Graves' disease, being efficient, safe and easy administration, but without there is a protocol defined. This work was evaluated the thyroid absorbed dose from its mass and maximum uptake of I-131 obtained in the examination of diagnostic radiology of radiotherapeutic patients undergoing treatment of Graves' disease. Based on the results, it is observed that the thyroid absorbed dose, as much in terms of mass as the maximum uptake of I-131 for different values of administered activity, varies significantly. The analysis of these parameters is an excellent indicator for the pre-define quantity of radionuclide that is administered to the patient in terms of the radiation dose required to achieve an efficient therapeutic treatment. Moreover, it was observed that the thyroid absorbed dose depends on the degree of pathology of the disease, its mass and of the maximum uptake of I-131. (author)

  5. Strategic environmental assessment applied to the oil and gas planning in Brazil: a proposal; O uso da avaliacao ambiental estrategica no planejamento da oferta de blocos para exploracao e producao de petroleo e gas natural no Brasil: uma proposta

    Energy Technology Data Exchange (ETDEWEB)

    Teixeira, Izabella Monica Vieira

    2008-01-15

    This thesis discusses the opportunity to apply strategic environmental assessment (SEA) to the oil and gas planning procedures in Brazil, considering the call for bids' process that has been adopted by the Federal Government since 1999. The thesis presents a literature review on the concepts and principles of environmental assessment, environmental impact assessment and strategic environmental assessment, considering its origins and practice. It also provides an appraisal of the international practice on SEA application to the oil and gas sector planning, as well as and a comparative analysis of the planning system as practiced in Brazil. Based on the international and the national SEA experience, and considering the requirements to address the environmental feasibility of oil and gas offshore activities, a proposal is presented on the framework for the use of the SEA as part of the oil and gas planning process in Brazil, together with the procedural requirements to be met. (author)

  6. Dosimetric evaluation of a combination of brachytherapy applicators for uterine cervix cancer with involvement of the distal vagina; Avaliacao dosimetrica de uma combinacao de aplicadores para braquiterapia de tumores do colo uterino com acometimento da porcao distal da vagina

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, Roger Guilherme Rodrigues [Real e Benemerita Sociedade Portuguesa de Beneficencia, Sao Paulo, SP (Brazil). Servico de Radioterapia Estereotactica; Carvalho, Heloisa de Andrade; Stuart, Silvia Radwanski; Rubo, Rodrigo Augusto [Universidade de Sao Paulo (USP), SP (Brazil). Hospital das Clinicas. Servico de Radioterapia], e-mail: handrade@hcnet.usp.br; Seraide, Rodrigo Migotto [Centro de Oncologia Campinas, SP (Brazil)

    2009-07-15

    Objective: To evaluate an alternative brachytherapy technique for uterine cervix cancer involving the distal vagina, without increasing the risk of toxicity. Materials And Methods: Theoretical study comparing three different high-dose rate intracavitary brachytherapy applicators: intrauterine tandem and vaginal cylinder (TC); tandem/ring applicator combined with vaginal cylinder (TR+C); and a virtual applicator combining both the tandem/ring and vaginal cylinder in a single device (TRC). Prescribed doses were 7 Gy at point A, and 5 Gy on the surface or at a 5 mm depth of the vaginal mucosa. Doses delivered to the rectum, bladder and sigmoid colon were kept below the tolerance limits. Volumes covered by the isodoses, respectively, 50% (V50), 100% (V100), 150% (V150) and 200% (V200) were compared. Results: Both the combined TR+C and TRC presented a better dose distribution as compared with the TC applicator. The TR+C dose distribution was similar to the TRC dose, with V150 and V200 being about 50% higher for TR+C (within the cylinder). Conclusion: Combined TR+C in a two-time single application may represent an alternative therapy technique for patients affected by uterine cervix cancer involving the distal vagina. (author)

  7. The refractometry use in the evaluation of type 'C' gasoline non-conformities; Uso da refratometria na avaliacao de nao conformidades da gasolina tipo 'C'

    Energy Technology Data Exchange (ETDEWEB)

    Santos, K.M.; Andrade, J.M.; Severiano, M.L.; Medeiros, M.A.O.; Fernandes, N.S.; Fernandes, V.J. [Rio Grande do Norte Univ., Natal, RN (Brazil)]. E-mail: klecia.morais@bol.com.br

    2003-07-01

    The need of the creation of practical and efficient methods that can monitor the quality of the automotive fuels it is an important factor, because they should evaluate the physical-chemical properties of the fuels to guarantee your conformity. To determine these parameters of conformity, several regulars analyses are done in the gasoline type 'C', as the distillation and content of ethyl alcohol (AEAC). However, the present work has as objective uses the refractometry in the forecast of irregularities in the gasoline trying to establish a faster and efficient analysis method. (author)

  8. Assessment of contamination for inorganic elements and phthalate esters in household dust from the metropolitan region of Sao Paulo; Avaliacao da contaminacao por elementos inorganicos e esteres ftalicos em poeira domestica da regiao metropolitana de Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Scapin, Valdirene de Oliveira

    2009-07-01

    Household dust has been identified as an important vector of exposure by inorganic and organic substances potentially toxic in children and adults. The dust composition has a strong influence of contaminants provided from internal and external environments. During the natural process of wearing or weather incidents of artifacts and materials variety, the chemical substances are released into the environment in the steam form or by leaching from final products. Once released, they can be accumulated and enriched in the dust; and by continuous exposure (inhalation, ingestion and dermal contact mechanisms), these substances are harmful to human health. In this work, a study to determine the inorganic constituents and phthalate esters concentrations in residential indoor environment dust samples, correlating them with the probable anthropogenic sources was proposed. Dust samples were collected from 69 residences in neighborhoods Pirituba, Freguesia do O, Jaragua and Perus of the Sao Paulo metropolitan region, using a domestic vacuum cleaner, between 2006 and 2008. The samples were sieved in the fractions of 850, 850-300, 300-150, 150-75, 75-63 and <63 {mu}m. The analysis by X-ray fluorescence (WDXRF) showed the presence of Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Br, Rb, Sr, Zr and Pb. The presence of phthalate esters (DEHP, DnBP, DEP, DEHA, DMP and BBP) was detected, by GCMS analyses. From the enrichment factor (EF), the elements P, S, Cr, Ni, Cu, Zn and Pb were classified as being significant and extremely enriched in the dust. The natural and anthropogenic contributions by statistical tools as factor analysis (AF) and cluster were identified. The elements Cr, Ni, Cu, Zn and Pb were present significantly elevated concentrations in relation to the total exposure values (ingestion, inhalation and skin contact) and to risk. (author)

  9. Evaluation of parapharyngeal space by computerized tomography and magnetic resonance. Part 1: anatomy; O valor da tomografia computadorizada e da ressonancia magnetica na avaliacao do espaco parafaringeo. Parte 1: anatomia

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Ricardo Pires de; Rapoport, Abrao [Hospital Heliopolis, Sao Paulo, SP (Brazil)

    1994-01-01

    The authors, through a comprehensive review of the literature, intend to establish an anatomical concept of the parapharyngeal space and its surroundings spaces in the supra-hyoid neck, based on its division by the fascial planes. The correlation between the anatomically defined parapharyngeal space and the findings of the sectional imaging procedures (computed tomography and magnetic resonance) is established, evidencing clear anatomic-radiologic correspondence. (author) 44 refs., 2 figs.

  10. Evaluation of the occupational dose reduction after automation process for calibration of gamma radiation monitors; Avaliacao da reducao da dose ocupacional apos automacao do processo de calibracao de monitores de radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Silva Junior, Iremar Alves da; Potiens, Maria da P.A., E-mail: iremarjr@gmail.com, E-mail: mppalbu@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    2013-11-01

    In this study, it was evaluated the occupational dose of calibration technicians responsible for monitor calibration of gamma radiation in the Instrument Calibration Laboratory of the Institute of Energy and Nuclear Research (IPEN-LCI), Sp, Brazil in your calibration activities before and after the automation of the process monitor calibration gamma be completed. Various measures of occupational dose values were taken inside the room calibration and the control room of radiators allowing calculate and show the occupational dose values in these environments during a full calibration of a monitor gamma radiation, showing the advantage of automation process, with decrease in dose and time calibration. (author)

  11. Evaluation of the effects of gamma radiation in minimally processed vegetables of Brassica oleracea species; Avaliacao dos efeitos da radiacao gama em vegetais da especie Brassica oleracea minimamente processados

    Energy Technology Data Exchange (ETDEWEB)

    Nunes, Thaise Cristine Fernandes

    2009-07-01

    The consumption of collard greens (Brassica oleracea cv. acephala) and broccoli (Brassica oleracea L. var. italica) has been inversely associated with morbidity and mortality caused by degenerative diseases. These species are highly consumed in Brazil, which enables its use as minimally processed (MP). The growing worldwide concern with the storage, nutritional quality and microbiological safety of food has led to many studies aimed at microbiological analysis, vitamin and shelf life. To improve the quality of these products, radiation processing can be effective in maintaining the quality of the product, rather compromising their nutritional values and sensory. The aim of this study was to evaluate the effectiveness of gamma radiation from {sup 60}Co at doses of 0, 1.0 and 1.5 kGy on the reduction of microbiota in these plants, and analyze their nutritional and sensory characteristics. The methodology used in this study was microbiological analysis, colorimetric analysis, analysis of phenolic compounds, antioxidant analysis and sensory analysis. The microbiological analysis showed a decrease in the development of populations of aerobic microorganisms, psychotropic and yeast and mold with increasing doses of radiation. The sensory analysis showed no significant difference between different times of cooking analyzed. The analysis of phenolic compounds, significant differences between the samples, suggesting that with increasing dose of irradiation was an increase in the amount of phenolic compounds found in broccoli and collard greens MP. It can be observed that the sample of control collard greens showed high antioxidant activity and for the samples treated by irradiation was a decrease of percentage. In contrast the samples of broccoli show an increase in the rate of scavenging DPPH with increase of the dose of radiation. The colorimetric analysis revealed that for samples of MP collard greens and broccoli foil of no significant differences, but for samples of stems of broccoli significant difference on the yellowing during storage. It is concluded that the processing of collard greens and broccoli butter by gamma radiation may be a viable alternative to the industry, since there was a reduction of the population of microorganisms, without changes in the sensory qualities and with minimum changes in the characteristics that confer antioxidant power. (author)

  12. Evaluation of natural radioactivity in superficial and underground drinking water, from the Caetite region, BA; Avaliacao da radioatividade natural em aguas potaveis, de superficie e subterraneas da regiao de Caetite, BA

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Luciana Sousa

    2011-07-01

    Brazil has the seventh greatest geological uranium reserve in the world with approximately 310 thousand tons. The Lagoa Real Uranium Province, in the region of Caetite and Lagoa Real, situated in South Center Bahia, is considered the most important monomineralic province in Brazil. Urban population who lives in the uranium district in the cities of Caetite, Lagoa Real and Livramento de Nossa Senhora uses drinking water originated from public supply. In the rural area, characterized by frequent draughts, residents receive water from digged and drilled wells and from small dams and reservoirs, as well, which are supplied by the rains. This work determined the levels of total alpha and beta radioactivity and the uranium concentrations in several kinds of water consumed by urban and rural population from the Lagoa Real Uranium Province. Total {alpha} and {beta} activities were determined with a low-level gas flow proportional detector. The uranium concentrations were determined with an inductive coupled plasma-mass spectrometer (ICP-MS). The results obtained were confronted with the latest World Health Organization's recommendations from 2011, the ordinance number 2914 of December 12 2011 from the Health Ministry and CONAMA's resolutions. Natural radiation levels varied from 0,0041 {+-} 0,0004 Bq.L{sup -1} to 0,80 {+-} 0,04 Bq.L{sup -1} for total alpha activity and from 0,045 {+-} 0,003 to 3,00 {+-} 0,2 Bq.L{sup -1} for total beta activity. Having the WHO and the HM as parameter, just two underground water samples, one located in the city of Lagoa Real and the other in the city of Caetite presented total alpha concentration above the value of 0,5 Bq.L{sup -1} described in its recommendations, 0,80 {+-} 0,040 Bq.L{sup -1} and 0,57 {+-} 0,03 Bq.L{sup -1} respectively. For total beta three samples presented radioactivity levels above the 1 Bq.L{sup -1} limit recommended by the WHO and established by the Health Ministry; 3,00 {+-} 0,2 Bq.L{sup -1}; 1,63 {+-} 0,13 Bq.L{sup -1} and 1,19 {+-} 0,07 Bq.L{sup -1}., all of them situated in the Lagoa Real town. Two samples of underground water from Caetite presented uranium concentrations above the value of 15 {mu}g.L{sup -1} determined by CONAMA, 20,3 {+-} 0,3 {mu}g.L{sup -1} and 17,1{+-} 0,3 {mu}g.L{sup -1}. In Lagoa Real one sample presented uranium levels six times over the limit established by the Environment National Council 89,5 {+-} 1,5 {mu}g.L{sup -1}. In 2004 the World Health Organization established in its recommendations the 15 {mu}g.L{sup -1} limit as the maximum uranium concentration in drinking water. In 2011 the WHO increased that limit to 30 {mu}g.L{sup -1}. Taking into account the current WHO recommendations only the concentration of one water sample presented uranium levels above the recommended, 89,5 {+-} 1,5 {mu}g.L{sup -1} in Lagoa Real. (author)

  13. Evaluation exposure to the ionizing radiation of workers during the operation of first Brazilian uranium mine; Avaliacao da exposicao de trabalhadores a radiacao ionizante durante a operacao da primeira mina de uranio do Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Wagner de S.; Oliveira, Sergio Q. de; Py Junior, Delcy de A.; Dantas, Marcelino V.A.; Silva, Ana Claudia A.; Garcia Filho, Oswaldo, E-mail: wspereira@inb.gov.b, E-mail: sergioquinet@inb.gov.b, E-mail: delcy@inb.gov.b, E-mail: marcelino@inb.gov.b, E-mail: anasilva@inb.gov.b, E-mail: ogarcia@inb.gov.b [Industrias Nucleares do Brasil (UTM/INB), Pocos de Caldas, MG (Brazil). Unidade de Tratamento de Minerios. Servico de Radioprotecao

    2011-10-26

    The production of uranium in Brazil initiated, in industrial scale, in the year of 1982, in the Miner-Industrial Complex at Pocos de Caldas, Minas Gerais, Brazil. This paper analysed the data of 13410 individual historic of dose, registered along the years of work, bay the radioprotection service of installation. Descriptive statistics and frequency histograms based on dose historic, and the annual distribution doses and the accumulated doses were evaluated during the functioning period of the CIPC, and his adequacy to the in force legislation at the time of it operation

  14. Mining adaptation to the radioprotection regulations: evaluation of the regulation CNEN-NN-4.01; Adaptacao da mineracao as normas de radioprotecao: avaliacao da Norma CNEN-NN-4.01

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Wagner de Souza; Kelecom, Alphonse [Universidade Federal Fluminense (LARARA/UFF), Niteroi, RJ (Brazil). Lab. de Radiobiologia e Radiometria; Silva, Cleber Jabarra da; Campinhos, Gabriela Michalsky [Jabarra Servicos e Comercio de Radioprotecao Ltda., Rio de Janeiro, RJ (Brazil). Consultoria em Radioprotecao

    2011-10-26

    This paper proposes a generic model of monitoring to be used in mining with uranium or thorium associated viewing to estimate the dose of workers for classification the mining in the specific question of worker exposure. Besides the monitoring model, a dosimetric model also is proposed. It is indicated some instruments and techniques used in individual and area monitoring, besides to point out the necessity of radioprotection supervisor specific in this area

  15. Inorganic composition determination and evaluation of the biological activity of Peperomia pellucida in the Aspergillus flavus growth; Estudo da composicao inorganica e avaliacao da atividade biologica de Peperomia pellucida no crescimento de Aspergillus flavus

    Energy Technology Data Exchange (ETDEWEB)

    Sussa, Fabio Vitorio

    2011-07-01

    In recent decades, there has been a great advancement in research in developing drugs from plants. Nevertheless, little significant care exists in the literature about the stable concentration of elements, as well as the activity concentration of '2{sup 38}U and {sup 232}Th decay products in plants used for this purpose in Brazil. The presence of stable elements and radionuclides in plants constitutes the pathway for their migration to humans, via uptake of tea or remedies made with medicinal herbs. Peperomia pellucida, whose popular name is 'erva de jabuti', is a plant known by its medicinal usages, such as healing and analgesic properties plus antibacterial and antifungal activities against food fungi. In this study, the elemental composition of Peperomia pellucida and surrounding soil samples collected in the Botanical Garden in Rio de Janeiro was determined; the elemental concentration in the alcoholic extract and infusion processes of dry plants was also determined. The elemental concentration of As, Ba, Br, Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Sm, Ta, Tb, Th, U, Yb and Zn was determined in the leaves, aerial parts, including leaves, stems and roots of Peperomia pellucida, in their extracts obtained by maceration and infusions and in the surrounding soil by the Instrumental Neutron Activation Analysis (INAA). The analytical methodology used to determine the elements Cd, Hg and Pb was the Atomic Absorption Spectrometry (AAS); the activities of {sup 226}Ra, {sup 228}Ra and {sup 210}Pb were carried out by gross alpha and beta counting, after radiochemical separation. The quality of the obtained results was assured by the analyses of the certified reference materials IAEA-336 Lichen, IAEA-Soil-7, IAEA-326 Radionuclides in soil, NIST 1515 Apple Leaves and NIST 1542 Peach Leaves. The relative standard deviations and the relative errors obtained in these analyses indicated good precision and accuracy of the results. The essential oil, ethanolic and hexane extracts of Peperomia pellucida were tested for antifungal activity against Aspergillus flavus in vitro on Petri plates. The antifungal activity was based on the inhibition zone and IC{sub 50} values against the pathogen on Petri plates assays. Also, the essential oil chemical composition was determined by GC-MS. (author)

  16. Evaluation of eco toxicity, biocide effectiveness and corrosiveness of fluid for pipelines hydro testing; Avaliacao da ecotoxicidade, eficiencia biocida e da corrosividade de fluidos para teste hidroestatico de dutos

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Cynthia A.; Veiga, Leticia F.; Penna, Monica O.; Souza, Leonardo S. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Nascimento, Juliana R.; Oliveira, Fabio F.; Amigo, Alexandre A.; Chaves, Claudia [Fundacao Gorceix, Ouro Preto, MG (Brazil)

    2005-07-01

    Before the installation of subsea pipelines for draining the oil and gas production, the line need to be submitted to hydrostatic tests. In these, the lines are flooded with sea water and chemicals and pressurized to check the leakage occurrence. By the end of the test, the fluid needs to be discharged in-situ. Based on the environmental restrictions, this study began, and the three most important aspects in relation to the environmental risks had been evaluated: the toxicity, the biocide efficiency and the fluids' corrosiveness. By the partial results, it was observed that the fluids which had presented the best results in all studied aspects were the ones that contained the biocide THPS, combined with U.V. and a quaternary salt. In relation to the corrosion, it could be established that the studied fluids do not present impacts in internal corrosion, since during the test, the pipes are totally flooded with the fluid, remaining stamped and all the internal air having been removed. An important aspect is: even with concentrations below of the recommended ones for biocides, in order to guarantee lower environmental risks, by making use of alternative techniques (U.V.) and efficient biocide products, it is also possible to reach success in terms of biocide's efficiency. A regular monitoring procedure of the fulfilling fluid's quality is essential. (author)

  17. Preliminary evaluation of the utilization of biopiles technology to the bioremediation of the soil of Guamare/RN (Brazil); Avaliacao preliminar da aplicacao da tecnologia de biopilhas para a biorremediacao do solo de Guamare/RN (Brasil)

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Edmilson P.; Macedo, Gorete R.; Duarte, Marcia M.L. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Dept. de Engenharia Quimica; Costa, Alex S.S. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2004-07-01

    The aim of this work was to evaluate the use of biopiles to the bioremediation of the soil of Stabilization Station of Guamare-RN-Brazil. The evaluation was performed by the characterization of the soil, tests of biodegradation in laboratory scale and by the use of a complete 2{sup 3} factorial design with triplicate at the central point. The input variables were: Nitrogen concentration; diesel-oil concentration; and inoculum concentration. The response variable was the percentage gravimetric loss of organic matter. Statistical analyses of the main factors and their interactions on the response variable were performed using contour curves and Pareto obtained from the software STATISTICA for Windows, Release 5.5. The results showed that biopiles technology can be used to remediate eventual contaminated areas in that region. (author)

  18. Preliminary analysis of doses to evaluate the image quality in radiographic examinations in veterinary radiology;Analise preliminar das doses para avaliacao da qualidade da imagem em exames radiograficos na radiologia veterinaria

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, Ana Carolina B.C.F.; Dias, Mayara T.P.; Santos, Andrea C. [Universidade de Sao Paulo (USP), SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia; Melo, Camila S.; Furquim, Tania A.C. [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia

    2009-07-01

    This work has as objective to promote the analysis of the radiological doses and quality of the image of the technical letter used for the accomplishment of thorax and coxal radiographic examination of animals of canine and feline species. The study was accomplished in the service of Diagnosis for Image in Veterinarian Hospital of Veterinary Medicine and Zootecnia College of University of Sao Paulo, in two conventional equipment. Initially, physical features of the animals and the technique used were collected for each one of the 188 radiographic examinations of thorax and 52 examinations of coxal. The animals were placed in different groups, according to their body weight. For each group, the averages for each feature were calculated: thickness of the radiographed region, tension, electric current, time of exhibition, current product electric-time, size of the used film, presence or absence of bucky and feature of focus (narrow or thick). On the basis of the averages of group M (of lesser weights that 5kg for cats and between 10,1kg and 20kg for dogs), was executed a physical analysis of the current technical letter, using the equipment: ionization chamber (to determinate the value of kerma in air), simulator objects (representative of the thickness of the animal) and three dispositive standards of test that evaluate space resolution, resolution in low contrast and contrast-detail. The obtained images were analyzed and compared for a physicist and a radiologist medical veterinary. The results had shown that the examinations supply dose considered high for techniques used mainly for coxal. The equipment A, although to supply higher doses, presents the better images for the majority of the projections. However, the study indicates that there are not exactly reference levels, but these examinations must pass for improvement of quality of image (author)

  19. Evaluation of the efficiency of a tubular digester in the reduction of organic load of biogas from swine wastes; Avaliacao da eficiencia de um biodigestor tubular na reducao da carga organica de biogas a partir de dejetos de suinos

    Energy Technology Data Exchange (ETDEWEB)

    Angonese, Andre Ricardo [Universidade Estadual do Oeste do Parana (UNIOESTE), PR (Brazil)], Email: aangonese@yahoo.com.br; Campos, Alessandro Torres [Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, MG (Brazil)], Email: atcampos3@yahoo.com.br; Moreno Palacio, Soraya [Universidade Estadual de Maringa (UEM), PR (Brazil); Szymanski, Nayara [Universidade Estadual do Oeste do Parana (UNIOESTE), PR (Brazil). Curso de Quimica

    2006-07-01

    The purpose of this study was to assess the efficiency of the anaerobic biological treatment systems in the reduction and stabilization of biodegradable organic matter of swine waste. The experiment was carried out at Vale dos Ipes Farm, located in the city of Ouro Verde do Oeste, in the Western of Parana State. One finishing phase swine unity containing 600 animals was monitored from January to June 2005. The system is composed by one steel digester with capacity for 50 m{sup 3}. The swine barn cleaning is performed by dry scratching on a daily basis. The generated residues flow by gravitation through ducts towards the digester. The duration of the hydraulic retention period was 12 days. The residues analysis was performed by means of sampling at the entrance and way out of the digester. The following parameters were analyzed: pH, DBO{sub 5}, DQO, total solids, total volatile solids, total fixed solids, total nitrogen e ammonia, potassium, total phosphate, average of biogas production. The results suggested that the anaerobic biological treatment system was efficient for reducing and stabilizing the organic matter resulted from the swine wastes. Expressive reductions of DBO, DQO, ST and SVT of 76, 77, 43 and 59% respectively, were obtained for the effluent originated by the digester. The average daily production of biogas during the analyzed period was 31, 5 m{sup 3}. (author)

  20. Evaluation gamma radiation in composite sisal fiber- polyurethane derived of castor oil by bending test; Avaliacao da influencia da radiacao gama em compositos de fibra de sisal - poliuretano derivado de oleo de mamona atraves de ensaios de flexao

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Felipe H. de; Geraldo, Ricardo R.; Vasco, Marina C.; Azevedo, Elaine, E-mail: helunica@yahoo.com.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Claro Neto, Salvador [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Instituto de Quimica

    2013-07-01

    Materials used for making furniture and accessories or positioning in X -ray examination rooms should not exhale volatile organic compounds and are resistant to ionizing radiation. One solution is the use of vegetable fiber and polyurethane composites of vegetable origin, since they are biodegradable, derived from renewable raw materials and have no volatile organic compounds. The main difficulty in developing this material is fiber adhesion with the polymer. The objective of this study is to evaluate the mechanical properties of composite sisal fiber composite, without further treatment, and polyurethane derived from castor oil, with a dose of 25 kGy gamma radiation, subjected to 3 points bending tests. (author)

  1. Environmental analysis of the proton exchange membrane fuel cell on the subject of life cycle assessment; Analise ambiental da celula a combustivel de membrana trocadora de protons sob o enfoque da avaliacao do ciclo de vida

    Energy Technology Data Exchange (ETDEWEB)

    Fukurozaki, Sandra Harumi

    2006-07-01

    The energy is the fuel of growth and an essential requirement for the socioeconomic development. However, the current production model is based on fossil fuels, considered as threat to man and nature. As for, the relating to the human activities and their effects on the environment, they are handled by the implementation of a more rigid model of environmental control and the mobilization of the society in favor of technologies with less energy impact. In view of this scenario, the Proton Exchange Membrane Fuel Cell - PEMFC has been recognized as a key for the vital need of a clean and efficient energy. Considering the conventional power generation system, their advantages during usage configure its application as an ideal option for several utilities, especially in the mobile sector. Even though, the focus on several environmental evaluations in energy systems is referred back to the initial stage of it use, the employment relating to production of the system and to final destination should be considered, since these also present impacts. In the case of PEMFC, their previous and subsequent phases of use are issues related to the platinum catalysts, which indicates an environmental importance that cannot be overlooked. In this sense, the Life Cycle Assessment has been used to understand and to question the risks and opportunities that are associated to certain product, starting from a systemic concept of their relationships with the environment. It is precisely in this context that the present research intends to present its major contribution, starting from an exploratory study towards the its objectives to provide an environmental analysis of such technology linked to post stage of powder-use of the membrane electrode assembly - MEA, concerning the platinum catalysts, on the subject of Life Cycle Assessment - LCA. To attain such aim, the relationships between energy, environment and development are presented and discussed, as well as, the Fuel Cell technology and the current studies on LCA of PEMFC. Several questions raised up on this issues have contributed in the development of a method of recuperating the PEMFC catalysts and, particularly, for its subsequent environmental evaluation. Among significant results are the importance of LCA, out lined as useful tool for perceiving the weight of environmental matters concerning the platinum and its subsidy strategies relating to the development, consolidation and to the innovation of PEMFC. (author)

  2. Study of the heterogeneity effects of lung in the evaluation of absorbed dose in radiotherapy; Estudo dos efeitos da heterogeneidade de pulmao na avaliacao da dose absorvida em radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Luciana Tourinho

    2006-02-15

    The main objective of radiotherapy is to deliver the highest possible dose to the tumour, in order to destroy it, reducing as much as possible the doses to healthy tissues adjacent to the target volume. Therefore, it is necessary to do a planning of the treatment. The more complex is the treatment, the more difficult the planning will be, demanding computation sophisticated methods in its execution, in order to consider the heterogeneities present in the human body. Additionally, with the appearing of new radiotherapeutic techniques, that used irradiation fields of small area, for instance, the intensity modulated radiotherapy, the difficulties for the execution of a reliable treatment planning, became still larger. In this work it was studied the influence of the lung heterogeneity in the planning of the curves of percentage depth dose, PDP, obtained with the Eclipse{sup R} planning system for different sizes of irradiation fields, using the correction algorithms for heterogeneities available in the planning system: modified Batho, general Batho and equivalent tissue-air ratio. A thorax phantom, manufactured in acrylic, containing a region made of cork to simulate the lung tissue, was used. The PDP curves generated by the planning system were compared to those obtained by Monte Carlo simulation and with the use of thermoluminescent, TL, dosimetry. It was verified that the algorithms used by the Eclipse{sup R} system for the correction of heterogeneity effects are not able to generate correct results for PDP curves in the case of small fields, occurring differences of up to 100%, when the 1x1 cm{sup 2} treatment field is considered. These differences can cause a considerable subdosage in the lung tissue, reducing the possibility of the patient cure. (author)

  3. Genealogias da alegria

    Directory of Open Access Journals (Sweden)

    Bruno Vasconcelos de Almeid

    2009-08-01

    Full Text Available Genealogias da Alegria tem por objetivo rastrear conceitos e construir planos sobre os quais podemos pensar a alegria como campo problemático. Trata-se de traçar linhas e acoplar fragmentos históricos e literários com a finalidade de subsidiar a discussão contemporânea em torno da alegria. O procedimento genealógico vale-se de trechos das obras de Calímaco e Luciano de Samósata, da elegia erótica romana e da alegria cristã. O passo seguinte consiste em rastrear o pensamento da alegria na obra de Gilles Deleuze, especialmente em três momentos: uma passagem de Diferença e Repetição, um trecho dos Diálogos extraído de Da Superioridade da Literatura Anglo-americana e a comunicação Pensamento Nômade no Colóquio de Cerisy. A alegria não se define como sentimento ou emoção; ao contrário, está ligada à premissa de afirmação da vida e ao caráter trágico da existência.

  4. A sabedoria da democracia

    Directory of Open Access Journals (Sweden)

    Gilson Matilde Diana

    2010-01-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2010v9n1p131Durante a maior parte da história, a democracia foi desprezada como uma forma política inferior – a regra do povo, ou “dos muitos”, era logo identificada como a regra da ralé, da escória. Herdando do povo a volubilidade e a instabilidade, a democracia estava sempre perigosamente próxima do arbítrio e da anarquia, com toda a violência que se costuma associar a isso.

  5. Corporeidade da voz : estudo da vocalidade poetica

    OpenAIRE

    Fernando Manoel Aleixo

    2004-01-01

    Resumo: Este material é o resultado da investigação prática da voz realizada a partir do desenvolvimento do princípio da sabedoria sensível do corpo. O texto expõe as etapas percorridas no levantamento de experiências e reflexões pedagógicas sobre a voz do ator, no estabelecimento de referências sobre o corpo e o aprendizado sensível e, também, no processo de composição poética do espetáculo teatral Voz Mercê Abstract: This material springs from a practical investigative work on voice base...

  6. Tratamento cirurgico das fraturas luxações da coluna cervical baixa por redução aberta e sem uso de tração craniana

    Directory of Open Access Journals (Sweden)

    Milton Cézar Correia

    2013-01-01

    Full Text Available OBJETIVO: Demonstrar os resultados do tratamento cirúrgico na coluna cervical baixa em 34 pacientes portadores de fratura-luxação traumática tratada através de técnica cirúrgica de artrodese com fixação sem o auxilio de tração craniana. MÉTODOS: Os pacientes foram avaliados clínica e radiologicamente e acompanhados por um período de um a quatro anos. RESULTADOS: A consolidação clínica e radiológica da artrodese foi observada em todos os 34 pacientes, sendo que quatro evoluíram com infecção do sítio cirúrgico posterior quando houve necessidade desse acesso complementar. RESULTADOS: A realização de redução da fratura luxação da coluna cervical baixa sem o uso de tração craniana juntamente com acesso cirúrgico por via anterior mostrou bons resultados com melhora clinica e radiológica, além de baixo índice de complicações neurológicas.

  7. Cartografia da paisagem alterada

    Directory of Open Access Journals (Sweden)

    Simone Cortezão

    2011-04-01

    Full Text Available O presente trabalho de pesquisa surge da investigação de paisagens alteradas, áreas pós-industriais e da geografia urbana que é conformada pela indústria. A preocupação principal é revê-las como espaço de investigação crítica sob o ponto de vista particular, integradas às noções da peculiar natureza industrial com suas consequentes transformações na paisagem, além das relações do indivíduo com esse novo meio produzido. “Cartografia da paisagem alterada” é uma pesquisa que indicia a paisagem alterada em pelo menos dois estratos: um que é o da construção da geografia da cidade pela indústria, e o outro que é a paisagem alterada subjetivamente, o que configura uma crítica e uma reação à conformação sócio geográfica em outros parâmetros - da proximidade, da experiência vivida e da construção de um vocabulário próprio.  A pesquisa teórica sobre áreas pós-industriais, associada a referências nas artes e arquitetura, constitui o primeiro estrato. Teorias e procedimentos artísticos de Robert Smithson, Joseph Beuys e Rem Koolhaas fornecem material para o segundo, mediante a pesquisa do cotidiano no lugar, a região do Vale do Aço, que se configura em um guia - glossário

  8. GERONTOLOGIA: ESTADO DA ARTE

    Directory of Open Access Journals (Sweden)

    Vera M.A.Tordino Brandão

    2010-02-01

    Full Text Available O Programa de Gerontologia da PUC desenvolve pesquisas focando o ser na perspectiva do envelhecimento. As atividades são interdisciplinares e reúnem docentes, alunos e ex-alunos. Nesta mesa redonda apresentamos um panorama sobre estes estudos. Na área da educação e comunicação o foco está centrado na longevidade e na preparação e representação social da velhice. São ressaltadas como temáticas: a formação continuada de profissionais e pesquisadores; o significado da religiosidade/espiritualidade ao longo da trajetória, e sua repercussão na qualidade de vida do idoso; os programas sócio-educacionais para idosos e concepções sobre educação; o monitoramento da mídia na cobertura da crescente longevidade e seus impactos. Em identidade e modos de morar reflete-se sobre soluções planejadas e sua adequação para a inclusão do envelhecimento populacional como questão fundamental, que implica a elaboração de novas políticas, investigações e, especialmente, apresenta-se como questão a ser analisada, refletida e vivenciada pela sociedade em geral. Quanto à saúde, o Programa desenvolve várias pesquisas numa abordagem interdisciplinar tendo como objetos de estudo: a terapia assistida com animais direcionada a idosos com diagnóstico de Alzheimer; o acompanhamento terapêutico e o atendimento psicoterapêutico em grupo, a aplicação da técnica de Calatonia em idosos moradores de ILPI, além da investigação sobre impasses clínicos no idoso frágil. Palavras-chave: gerontologia, longevidade, envelhecimento

  9. CONDICIONANTES DA COMPETITIVIDADE EMPRESARIAL

    Directory of Open Access Journals (Sweden)

    José Luiz Contador

    2010-03-01

    Full Text Available Este trabalho examina teoricamente os fatores determinantes da competitividade do produto e do negócio, imprescindíveis à elaboração de estratégias competitivas que visam à obtenção e sustentação de vantagens competitivas. Esse tema é objeto tanto da área de marketing estratégico quanto da de estratégia empresarial. Nas duas áreas, há um ponto de consenso que afirma que a empresa deve diferenciar sua oferta para conquistar e manter vantagem competitiva. Mas, os estudos conduzidos por meio do modelo de Campos e Armas da Competição revelaram que a empresa pode diferenciar seu produto e/ou serviço de modo mais amplo, levando em consideração, na formulação da sua estratégia competitiva, também o campo da competição, quer do produto, quer dela própria. Assim, o objetivo deste artigo é evidenciar que, para a empresa ser competitiva, além de diferenciar seu produto e/ou seu serviço no sentido tradicional, ela precisa: 1 diferenciar seu produto incluindo a definição em quais campos vai competir em cada segmento; e 2 escolher as armas da competição que irá utilizar e definir a intensidade de cada arma. Para atingir tal objetivo, foram necessários vários conceitos do modelo de Campos e Armas da Competição: campo da competição, arma da competição, tese do modelo, configuração dos campos da competição, campo coadjuvante, produto coadjuvante e par produto-mercado. Como uma proposta inovadora sempre desperta dúvida, é mostrado o processo de validação do modelo de Campos e Armas da Competição e são discutidas sua universalidade, consistência e completude.

  10. ESPECTROS INFRAVERMELHOS DA CREATINA

    Directory of Open Access Journals (Sweden)

    Kumiko K. Sakane

    2011-08-01

    Full Text Available São apresentados espectros infravermelhos da creatina, na faixa de 4000 a 400 cm−1. Os resultados são comparados com espectros observados e calculados, publicados na literatura.

  11. Het Italiaanse voorzetsel da

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In een voorzetselstudie in het kader van Jackendoffs semantische theorie wordt het sterk polyseme Italiaanse voorzetsel da geanalyseerd als een verzameling deelbetekenissen waarbij de meeste door een of meer semantische regels afgeleid kunnen worden van de basisbetekenis ruimtelijke He

  12. Metaplasia gástrica em duodeno e infecçao pelo Helicobacter pylori

    OpenAIRE

    Souza, Raquel Canzi Almada de

    2013-01-01

    Resumo: A doenca ulcerosa peptica duodenal e uma condicao multifatorial, na qual a infeccao pelo H elico b a cter p y lo r i tem participacao relevante. O presente trabalho avaliou 52 pacientes com ulcera duodenal (Grupo 1) e 30 com dispepsia nao ulcerosa - endoscopia digestiva alta normal- (Grupo 2), com o objetivo de determinar a prevalencia da metaplasia gastrica superficial (MGS) no duodeno e infeccao gastrica e duodenal pelo H. p y lo r i nesses dois grupos. Durante a avaliacao endoscopi...

  13. Impacto ambiental da apicultura

    OpenAIRE

    1999-01-01

    A cultura da abelha doméstica Apis. mellifera L. ou apicultura é conhecida desde a antiguidade, sendo o mel uni alimento natural corrente entre os povos primitivos. Pinturas rupestres mostram que desde o neolítico o homem era atraído pelo mel, pois tentava recolher ninhos de abelhas selvagens e instalava-os em cavidades naturais das rochas, muito perto da sua habitação.

  14. Workshop Euratom Directive 97/43. New trends in radiation protection in clinical practice, in research and in regulation; Giornata di studio La Direttiva Europea 97/43: nuovi orientamenti per la radioprotezione nella pratica clinica, nella ricerca e nel quadro normativo

    Energy Technology Data Exchange (ETDEWEB)

    Mazzei, F. [ed.] [Istituto Superiore di Sanita' , Rome (Italy). Lab. di Fisica

    1999-07-01

    The Euratom Directive 97/43 on health protection of individuals against the dangers of ionizing radiation in relation to medical exposure is presented. In particular the following topics are focused, with a multidisciplinary approach, on: diagnostic reference levels in radiodiagnostics and nuclear medicine; radiation protection in paediatrics, in interventional radiology and in computer tomography; radiation protection radiotherapy, radiation protection in medical research; radiation protection in prenatal and neonatal exposure; radiation protection in medical-legal exposures. [Italian] Il rapporto raccoglie una presentazione della Direttiva Euratom 97/43 riguardante la protezione sanitaria delle persone contro i pericoli delle radiazioni ionizzanti connessi a esposizioni mediche. In particolare sono affrontati in modo interdisciplinare i seguenti argomenti: livelli diagnostici di riferimento in radiodiagnostica e in medicina nucleare; radioprotezione nelle esposizioni in eta' pediatrica, in radiologica interventistica e in tomografia computerizzata; radioprotezione in radioterapia; radioprotezione nella ricerca scientifica clinica; radioprotezione nell'esposizione in eta' prenatale e neonatale; esposizioni potenziali e radioprotezione nelle esposizioni medico-legali.

  15. Em defesa da semiodiversidade

    Directory of Open Access Journals (Sweden)

    Antônio Risério

    2008-11-01

    Full Text Available Semiodiversidade é um conceito que denomina a esfera da vida que se refere particularmente ao reino dos signos. Embora tenha sido criado no contexto das discussões sobre a biodiversidade, ele compreende um amplo campo que é quase desconhecido. Contrariamente à biodiversidade, não é um termo da moda, ainda que abarque um amploconjunto de problemas. As mais diferentes linguagens, signos e códigos culturais encontram lugar no domí­nio da semiodiversidade. Neste artigo a defesa da semiodiversidade é uma forma de preservar a vida humana neste momento da aventura do homem no planeta.Abstract: Semiodiversity is a concept to denominate the sphere of life that refers, particularly, to the realm of signs. Although it has been created in the context of biodiversity, it assigns a wider territory, which is almost unknown. Contrary to biodiversity, it is not a trendy' term, even though embeding a much wider scope. The most different languages, signs and cultural codes can be found in the domain of semiodiversity. In this article, the defense of semiodiversity is a way to preserve human life at this moment of humanadventure on Earth.

  16. DA LITERATURA AO PENSAMENTO

    Directory of Open Access Journals (Sweden)

    Gustavo Bernardo

    2012-07-01

    Full Text Available Apresento uma concepção pessoal do ensino de literatura, condensando a discussão das principais questões que o afetam: a singularidade da disciplina entre as demais disciplinas escolares; a crítica do realismo como valor dominante; a importância do exemplo; os efeitos da desvalorização salarial e moral do professor; a praga das adaptações literárias para jovens. A partir dessas questões, apresento cinco modos de leitura e ensino do texto literário, a saber: ler como resposta; ler como pergunta; a leitura ingênua; a leitura crítica; a leitura teórica. Concluo pela necessidade de proteção radical à dúvida, fundadora da literatura e do próprio pensamento.

  17. GESTAO DA AGRICULTURA URBANA

    OpenAIRE

    2014-01-01

    Este artigo apresenta o conceito de agricultura urbana e sua contribuição para a integração da atividade agrícola com o ambiente urbano, incentivando o desenvolvimento de cidades sustentáveis. Analisa o grau de complexidade encontrado pelas autoridades ao criar e aplicar politicas pública onde os sistemas urbanos de suprimento de alimentos não são acessíveis a toda a população. Traz luz a algumas das questões diretamente relacionadas à implantação da agricultura em grandes centros urbanos, ta...

  18. Da Vinci Linjen

    DEFF Research Database (Denmark)

    Nissen, Poul

    Afsluttende evalueringsrapport fra følgeforskningen gennem tre år i forbindelse med dety pædagogiske arbejde på Blåbjerggårdskolens Da Vinci Linje for skolemotiverede og underpræsterende elever på 7. til 9. klassetrin.......Afsluttende evalueringsrapport fra følgeforskningen gennem tre år i forbindelse med dety pædagogiske arbejde på Blåbjerggårdskolens Da Vinci Linje for skolemotiverede og underpræsterende elever på 7. til 9. klassetrin....

  19. Profilaxia da peste

    Directory of Open Access Journals (Sweden)

    Renato dos Santos Araújo

    1967-12-01

    Full Text Available O autor parte da premissa de que a profilaxia da doença infecciosa decorre do encadeamento epidemiológico: fonte de infecção-veículo transmissor - receptivel, para explicar a da peste, baseada no mesmo princípio. Depois de citar os 4 principais complexos epidemiológicos da peste e afirmar que tôda a profilaxia da doença consiste em atingir os dois primeiros elos dessas cadeias e proteger o último, passa a classificar os vários métodos profiláticos empregados em 2 grandes grupos: o das medidas destrutivas ou provisórias e o das medidas supressivas ou definitivas. Entre as primeiras arrola a desratização e a despulização, às quais acrescenta o tratamento e isolamento do doente e do portaãor, e entre as segundas inclui a anti-ratização e a imunização. A seguir, passa a explicar em que consistem essas várias medidas profiláticas e quais os agentes de que se tem lançado mão para executá-las, expendendo ao curso dessa exposição o conceito que formula a respeito de cada uma delas, à guisa de apreciação do seu valor relativo. Enaltece sobretudo as medidas supressivas ou definitivas, às quais empresta a maior significação na luta antipestosa, chamando a atenção, em especial, para a necessidade de estudos imunológicos para aperfeiçoamento do poder imunitário das vacinas de germes vivos avirulentos, que considera um grande recurso para a profilaxia da doença, sobretudo para a proteção do rurícola, cujo labor e modo de vida o expõem inevitavelmente a se infectar, por ocasião da ocorrência de epizootias de origem silvestre. Concluída essa primeira parte, passa a fazer o histórico de como se desenvolveu a campanha contra a peste, no Brasil, desde a época da sua invasão em 1899 pelo pôrto de Santos até os nossos dias. Nesse histórico, detem-se um pouco para expôr a atuação do extinto Serviço Nacional de Peste, o qual, criado em 1941, após a reorganização do Departamento Nacional de Saúde, passou

  20. O uso da L-carnitina como adjuvante no tratamento da miocardiopatia dilatada em criança com Aids Usage of L-carnitine as adjuvant in the treatment of dilated cardiomyopathy in a child with Aids

    Directory of Open Access Journals (Sweden)

    Lourdes Zélia Zanoni

    2011-06-01

    Full Text Available OBJETIVO: Apresentar a resposta cardiovascular à L-carnitina de um paciente com insuficiência cardíaca congestiva decorrente de miocardiopatia dilatada pelo vírus da imunodeficiência humana. DESCRIÇÃO DO CASO: Criança com quadro clínico de insuficiência cardíaca congestiva grave devido à miocardiopatia dilatada pela síndrome de imunodeficiência adquirida. O tratamento para as manifestações clínicas foi instituído, com pouca resposta clínica. Com objetivo de melhorar o desempenho energético/metabólico dos cardiomiócitos, foi instituída terapia com L-carnitina. Observou-se significativa melhora clínica do paciente, em relação ao desempenho cardíaco, mesmo antes do início do tratamento com os fármacos antirretrovirais. COMENTÁRIOS: A L-carnitina é um composto que facilita o transporte dos ácidos graxos de cadeia longa para dentro da mitocôndria. Nesse caso, o uso da L-carnitina parece ser clinica e bioquimicamente justificado.OBJECTIVE: To present the cardiovascular response to L-carnitine of a patient with congestive heart failure caused by dilated cardiomyopathy and human immunodeficiency virus. CASE DESCRIPTION: Child with a clinical history of severe congestive heart failure due to dilated cardiomyopathy caused by acquired immunodeficiency syndrome. The treatment for the symptoms resulted in a poor clinical response. In order to improve the energetic performance/metabolism of cardiomyocytes, therapy with L-carnitine was established. There was significant clinical improvement of the cardiac performance of the patient, even before starting the treatment with antiretroviral drugs. COMMENTS: L-carnitine is a compound that facilitates the transport of long-chain fatty acids into the mitochondria. In this case the administration of L-carnitine appears to be clinically and biochemical justified.

  1. O labirinto da contemporaneidade

    Directory of Open Access Journals (Sweden)

    Lang, Charles Elias

    2011-01-01

    Full Text Available O presente trabalho discute a modernidade e a produção da subjetividade contemporânea. Toma-se como modelo o labirinto de Eco (1985. Existem três tipos de labirintos: o labirinto clássico, o maneirístico, e a rede. O clássico é unicursal. Assim que se entra, a única coisa que se pode fazer é chegar ao centro e, do centro, só o que se pode fazer é encontrar uma saída. O maneirístico propõe escolhas alternativas. Todos os percursos levam a um ponto morto, com exceção de um que leva à saída. Na rede, cada ponto pode ter conexão com qualquer outro ponto. Se os labirintos anteriores têm um interior e um exterior, a rede, extensível ao infinito, não tem nem um dentro nem um fora. A partir deste modelo discute-se a produção de individualidades e subjetividades, do corpo como meio de comunicação e a produção de imagens do corpo através da mídia

  2. O esvaziamento da cultura

    Directory of Open Access Journals (Sweden)

    Andressa Paula de Andrade

    2015-01-01

    Full Text Available Trata-se da resenha da obra "A civilização do espetáculo: uma radiografia do nosso tempo e da nossa cultura" de autoria de Mario Vargas Llosa, ganhador do Nobel de Literatura em 2010. O trabalho busca compreender este tempo em que a diversão assume maior relevância em detrimento da cultura profunda e reflexiva. Destarte, a todo momento se olha para o passado com vistas a examinar este fenômeno que se tornou um verdadeiro "esvaziamento cultural". Outrossim, busca-se elucidar que embora ocorra um progresso científico, acesso a educação e a tecnologia de forma vertiginosa, isso não significa que a as artes avançaram na mesma velocidade, pelo contrário, acabou estagnando e já não visa mais a modificação de estruturas, mas apenas entreter.

  3. Dj Da Hai

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Miko Da Hai is DJ at a Xi’an disco bar. At work, in his cool attire, the pulsing disco beat punctuated by his distinctive vocal commentary, he makes a striking impression. The job having come his way by chance, Miko is now a skilled and experienced DJ of eight years’ standing. This may be

  4. O livro da alma

    Directory of Open Access Journals (Sweden)

    Oliver Tolle

    2016-12-01

    Full Text Available Trata-se de compreender os pressupostos da filosofia concreta pretendida por Johann Gottfried Herder (1744-1803 em uma série de textos redigidos durante as décadas de 1760-70. Se, por um lado, Herder demonstra afinidade com a mesma harmonia preestabelecida que está na base de leibnizianos como Gottsched e Baumgarten, por outro, ele aprofunda a discussão sobre a origem do conhecimento humano ao reduzir a importância de juízos de valor universal e acentuar a necessidade de uma aproximação constante das sensações que se agitam obscuramente no fundo da alma. Disso resulta uma concepção inusitada de sabedoria, a qual depende de uma renúncia à posse confortável de conhecimentos abstratos e da aceitação da natureza cambiante e apenas parcialmente perscrutável daquilo que nos move. Se com isso perde-se a certeza, abre-se em contrapartida uma dimensão essencialmente ativa e sensível de realização no mundo.

  5. Evaluation of the efficiency of a plug-flow digester to produce biogas from swine waste water; Avaliacao da eficiencia de um biodigestor tubular na producao de biogas a partir de aguas residuarias de suinocultura

    Energy Technology Data Exchange (ETDEWEB)

    Feiden, Armin [Universidade Estadual do Oeste do Parana (UNIOESTE), Marechal Candido Rondon, PR (Brazil). Centro de Ciencias Agrarias], e-mail: armin.feiden@creapr.org.br; Reichl, Johann [Escola de Energia Biolsolar, Quatro Pontes, PR (Brazil); Schwab, Jair; Schwab, Vera [Colegio Estadual Entre Rios do Oeste, PR (Brazil)

    2004-07-01

    The performance of a plug-flow digester, type Reichl, was evaluated with and without mixing. The digester, treating swine wastewater, had a capacity of 800 m{sup 3} and were operated at a loading rate of 0,931 kg and 0,634 kg of total solids and volatile solids per day, respectively. With mixing, the daily average biogas production was 289,50 m{sup 3} day{sup -1}, the specific volume production of 0,362 m{sup 3} biogas m{sup -3} reactor day{sup -1} and a specific biogas production of 0,389 m{sup 3} and 0,571 m{sup 3} biogas kg{sup -1} total solids and volatile solids added, respectively. Without mixing, was observed a reduction of 17,69% on the daily average biogas production, to only 238,30 m{sup 3} day{sup -1}. It correspond to a specific volume production of 0,298 m{sup 3} biogas m{sup -3} reactor day{sup -1} and a specific biogas production of 0,320 m{sup 3} and 0,470 m{sup 3} biogas kg{sup -1} total solids and volatile solids added, respectively. With mixing, a reduction of 68,67% total solids was achieved, compared to 52,11% without mixing. Considering volatile solids, it was achieved 80,16% with mixing, compared to 58,77% without mixing. (author)

  6. Evaluation of the contamination risk by {sup 241}AM from lightning rods disposed at uncontrolled garbage dump; Avaliacao da contaminacao provocada por para-raios radioativos de americio-241 descartados em lixoes

    Energy Technology Data Exchange (ETDEWEB)

    Marumo, Julio Takehiro

    2006-07-01

    Radioactive lightning rods were manufactured in Brazil until 1989, when the licenses for using radioactive sources in these products were lifted by the national nuclear authority. Since then, radioactive devices have been replaced by Franklin type one and collected as radioactive waste. However, only 23 percent of the estimated total number of installed rods was delivered to Brazilian Nuclear Commission (Comissao Nacional de Energia Nuclear - CNEN). This situation is of concern as there is a possibility of the rods being discarded as domestic waste, considering that in Brazil, 63.6 percent of the municipal solid waste is disposed at uncontrolled garbage dump, according to Instituto Brasileiro de Geografia e Estatistica (IBGE) in 2000. In addition, americium, the most common employed radionuclide, is classified as a high toxicity element, when ingested or inhaled. In the present study, it was performed migration experiments of Am-241 by lysimeter system in order to evaluate the risk of contamination caused by radioactive lightning rods disposed as a common solid waste. Sources removed from lightning rods were placed inside lysimeters filled with organic waste, collected at the restaurant of Instituto de Pesquisas Energeticas e Nucleares, IPEN-CNEN/SP, and the generated leachate was periodically analyzed to determine its characteristics such as pH, redox potential, solid content and concentration of the radioactive material. Microbial growth was also evaluated by counting the number of colony forming units. The equivalent dose to members of the public has been calculated considering the ingestion of drinking water, the most probable mode of exposure. The final result was about 145 times below the effective dose limit of 1 mSv.year-1 for members of the public, established by the International Commission on Radiological Protection (ICRP), demonstrating that the risk caused by lightning rods disposed at uncontrolled garbage dump is low. (author)

  7. Use of the HRICP-MS technique for the evaluation of boron isotopes in Eucalitpus plants; Uso da tecnica HRICP-MS na avaliacao dos isotopos de boro em eucalipto

    Energy Technology Data Exchange (ETDEWEB)

    Mattiello, Edson Marcio; Ruiz, Hugo Alberto; Silva, Ivo Ribeiro da, E-mail: mattiello@ufv.b [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Solos; Sarkis, Jorge Eduardo de Souza [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-07-01

    The {sup 10}B isotope tracer technique is essential to study the B mobility in plants. Factors that can influence the quality of measured B isotope ratios were optimized experimentally using High Resolution Inductively Coupled Plasma Mass Spectrometry (HRICP-MS). An isotopically certified standard (NIST SRM-951) was used. The best combination was obtained using a resolution of 400, a RF power of 1250 W, followed by 15 measurements over a 10-s integration period each (15*10). Utilizing this approach it was possible to obtain a precision of 0.3 % in standard material and 2z % in the experimental samples. The results show the importance of establishing optimized work conditions before carrying out the analytical series. (author)

  8. Evaluation of '9{sup 9}Mo presence in eluates of {sup 99}mTc used in nuclear medicine; Avaliacao da presenca de {sup 99}Mo em eluatos de {sup 99m}Tc utilizados em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Bianca da Silva

    2010-07-01

    Tc-99m is used for diagnostic imaging in nuclear medicine through SPECT technique. It is obtained by the elution of {sup 99}Mo/{sup 99m}Tc generators. During the elution process {sup 99}Mo can be extracted becoming a radionuclidic impurity. One of the quality parameters of the eluate is the radionuclidic purity, MBT (molybdenum break through), defined as the ratio between {sup 99}Mo and {sup 99m}Tc activities in the eluate. The North-American and European pharmacopoeias restrict the {sup 99}Mo content, respectively, in 0.015 e 0.1% and, according to the International Atomic Energy Agency (IAEA), the activity ratio at the moment of administration of the radiopharmaceutical to the patient, should not exceed 0.015%. In Brazil, the control of such parameter is not obliged in official regulations. Thus, the objective of this work is to evaluate the occurrence of {sup 99}Mo in {sup 99m}Tc eluates. It was initially optimized a methodology to determine the activity of {sup 99}Mo in eluate samples. Efficiency curves were obtained for a NaI (Tl) 8'' x 4'' scintillation detector installed at the In Vivo Monitoring Laboratory (LABMIV-IRD). The methodology has been validated through the measurement of a {sup 99}Mo standard liquid source calibrated at the National Metrology Laboratory for Ionizing Radiation (LNMRI-IRD). The samples analyzed in this work were gently supplied by 5 Nuclear Medicine Clinics located in the city of Rio de Janeiro. The activities of {sup 99}mTc and {sup 99}Mo in those samples have been measured respectively at the clinics and at the LABMIV. By applying a standardized methodology, the ration between the activities were calculated. The results show that 147 out of 174 samples presented {sup 99}Mo activities above the minimum detectable activity of the technique. On the other hand, only 2 out of 147 samples surpassed the MBT limit suggested by the IAEA and have been detected in samples eluted from generators of 750 mCi. In one of the samples, eluted from a generator of 1000 mCi, the calculated MBT value was very close to the IAEA limit. However, the results are not sufficient to establish a relationship between MBT values and generator activity. The measurement technique developed has enough sensitivity to detect {sup 99}Mo in {sup 99m}Tc eluates samples and permits to evaluate the quality of the generators used by the Clinics participating in this study. Furthermore, it was developed a spreadsheet aimed to calculate MBT values at the moment of elution to be used by the staff of the clinic. (author)

  9. Evaluation of demand for water and electricity for papaya micro sprinkler irrigation system in Paraiba state, Brazil; Avaliacao das demandas de agua e energia eletrica para mamao irrigado por microaspersao no estado da Paraiba

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Riuzuani Michelle Bezerra Pedrosa; Dantas Neto, Jose; Farias, Soahd Arruda Rached Farias; Azevedo, Carlos Alberto Vieira de [Universidade Federal de Campina Grande (UAEAG/UFCG), PB (Brazil). Centro de Tecnologia e Recursos Naturais. Unidade Academica de Engenharia Agricola], Emails: riuzuani@yahoo.com.br, zedantas@deag.ufcg.edu.br, soahd_rached@hotmail.com, cazevedo@deag.ufcg.edu.br

    2010-07-01

    This study aimed to conduct an assessment on the demands for water and electricity for fruit irrigated by micro sprinkler irrigation in agricultural planning. We obtained the demands of gross water and electricity for papaya in 15 municipalities spread over the Rio Paraiba-PB, which was used by micro irrigation system with 90% application efficiency. The city of Joao Pessoa is the place to lower water consumption, requiring 32.9% of the amount required for papaya in Exile, which had the highest annual and daily evapotranspiration, combined with the lowest annual rainfall likely at a 75 % probability. The municipalities were chosen because they had a greater variance in terms of climate, in order to examine various irrigation demands. In Exile is a necessary volume of water-to 8.006,9 m{sup 3}.ha{sup -1}.year{sup -1} to produce one hectare of papaya while in Joao Pessoa need to 2.712,89 m{sup 3}.ha-1.year{sup -1}. The consumption of electricity in the city of Desterro is higher among the cities studied, necessitating 2.009,0 kW.ha{sup -1}.ano{sup -1} to produce one hectare of papaya, while in Joao Pessoa we only need 876,54 kW.ha {sup -1}.ano{sup -1} (author)

  10. Assessment of ionizing radiation as a risk factor for breast cancer incidence in Goiania; Avaliacao da radiacao ionizante como fator de risco para a incidencia de cancer de mama em Goiania

    Energy Technology Data Exchange (ETDEWEB)

    Lage, Leonardo Bastos

    2016-11-01

    This research aims to evaluate whether exposure to ionizing radiation to which women are subjected can be associated with the incidence of breast cancer in Goiania. The defined study area is the central region of Goiania, or the Sanitary Districts of Campinas-Centro and Sul, in which are the seven major accident sources of contamination with Cesium 137, and also, as shown by previous study, the majority of new cases of breast cancer (60,43 %). We used the geographical division of the city in census tracts and health districts. The data collection was divided in two stages: the first, for the survey of radiometric measurements, and the second, for identifying the addresses of women diagnosed with breast cancer. The radiometric survey occurred between 2010 and 2014, in which was used an environmental gamma radiation mobile measuring system. This system was composed by a high-sensitivity detector coupled to a Global Positioning System (GPS) and a microcomputer. The assembly was installed on a motor vehicle so that the height of the detector is found at one meter from the ground, and programmed to obtain a measurement of the doses absorbed in the air rate each second. The data collected were: doses absorbed in the air rate, geographical coordinates, altitude, date and time of acquisition. From Mobisys software, files were generated and from ArcGIS 10.0 platform, geospatial assessment survey through the elaboration of thematic maps and geospatial analysis statistics. The annual averages of effective doses and collective effective doses were estimated from the rate of doses absorbed in air collected by the system and the resident population in the census tracts. The second stage begun from the data collection at the Registry of Goiania's Population Based Cancer (RCBPGO), in which were identified addresses of women diagnosed with breast cancer between 2001 and 2010. Part of the data was geographically referenced and using census data were estimated and compared the annual averages of crude rates of incidence. The spatial correlation of groups (clusters) of new cases has been verified, through the Moran index, and from geographically referenced radiometric measurements obtained in the previous step, the correlation between the incidence of breast cancer and ionizing radiation levels was assessed by unconditional linear regression. The results were presented in two papers. In the first, radiometric surveys were conducted in 1.405 of the 1.636 (85,9%) census tracts sectors that make up the seven Sanitary Districts in the city of Goiania. In total 197.811 geographically referenced measures of the absorbed dose rate in the air were made, with a average of 29,85 ± 7,47 and amplitude from 9,17 to 629,88 nGy/h. From these values were estimated the average of annual effective dose and collective effective dose for outdoor environments, with values of 0,036 ± 0,003 mSv/year and 28,51 ± 11,68 man.mSv/year, respectively. The levels of exposure to external gamma radiation, found in the city of Goiania 28 years after the radiological accident with Cesium-137, are compatible with the values estimated by UNSCEAR (United Nations Scientific Committee on the Effects of Atomic Radiation). And the value of the annual average of effective dose in Goiania, is lower than in other places in Brazil, which have only 'background' of natural radiation outdoors. The results obtained in this study indicate that the dosimetric situation in Goiania does not present undue risk to people and the environment. In the second article, were identified 4.105 new cases of breast cancer, 2.233 in the study area and 1.286 (57,59%) of these geographically referenced. The annual average values of crude rates of incidence, considering the total numbers of cases and geographically referenced presented in the study area are, respectively, 102,91 and 71,86 new cases per 100.000 women. The crude rate of incidence in Goiania was 66,59 cases per 100.000, while in the study area was 102,91 cases per 100.000 and, outside the area, 46,86 ca ses per 100.000. These value s are within the range of average values presented by other Brazilian capitals, which is 130,99 cases per 100.000 in Porto Alegre-RS, and 20,04 cases in Macapa/AP, and the national average in the capital of 79,37 cases per 100.000 women. The cluster analysis showed a slight spatial correlation of crude rates of breast cancer incidence in three small sets of census tracts, far from the accident sources of contamination with Cesium-137. The scatter plot points and the R{sup 2} value did not indicate any association between the crude rates of incidence and radiometric measurements. This study supports the hypothesis that ionizing radiation levels to which women living in Goiania are exposed, are not associated with the emergence of new cases of breast cancer. (author)

  11. Radioisotope and mathematical modeling in the assessment of supplementation of Phytase in diets for growing pigs; Radioisotopo e modelagem matematica na avaliacao da suplementacao de fitase em dietas para suinos em crescimento

    Energy Technology Data Exchange (ETDEWEB)

    Mota, L.C.; Moreira, J.A.; Oliveira, R.L.R., E-mail: japmoreira@bol.com.br [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Vitti, D.M.S.S. [Centro de Energia Nuclear na Agricultura (CENA/USP), Piracicaba, SP (Brazil); Patino, R.M. [Universidade de Sucre, Bogota (Colombia)

    2014-02-15

    The purpose of this study was to evaluate the effects of including increasing levels of phytase enzyme in pig diets for growing pigs, using the mathematical model. Data from 20 crossbred male piglets, castrated and weighing 26.80 kg on average was used. The animals were housed in individual metabolic cages to collect feces and urine in a 17 day period. A randomized block experimental design containing five treatments and four repetitions was used. The experimental diet provided to piglets contained corn and soybean and was supplemented with five increasing levels of phytase enzyme (0, 250, 500, 750 and 1000 UF/kg), corresponding to 0.00 %, 0.01 %, 0.02 %, 0.03 % and 0.04 % respectively. The variables evaluated were: intake, excretion, output flow of P in the digestive tract, bloodstream, bones and soft tissues. The phytase enzyme did not affect the P intake (P>0.05 (F{sub 10}), the P excreted in urine (F{sub 02}) and the output flow of P in the bones (F{sub 32} e F{sub 23}) and soft tissue (F{sub 42} e F{sub 24}), however, there was a reduction in P excreted in feces (F{sub 01}) of 8.92 %, 26.76 %, 22.53 % and 28.64 % to the levels 0, 250, 500, 750 e 1000UF/kg, respectively and showed a positive linear effect (P<0.08) for the endogenous P (F{sub 12}). Corn and soybean meal based diets can be used with 50% of P by dicalcium phosphate, adding 250UF/kg diet for growing pigs, and may cause a reduction of 27 % of P excretion in feces. (author)

  12. Evaluation of the ionizing radiation effects in microbiology, physical and chemical and sensory aspects of ice cream; Avaliacao dos efeitos da radiacao ionizante nos aspectos microbiologicos, fisico-quimicos e sensoriais de sorvetes

    Energy Technology Data Exchange (ETDEWEB)

    Rogovschi, Vladimir Dias

    2015-06-01

    The ice cream is defined as an emulsion of fats and proteins or a mixture of water and sugar, other ingredients may be added provided since they do not affect the product. It is considered a food of high nutritional value, providing lipids, carbohydrates, protein, calcium, phosphorus, and other minerals and vitamins (A, B1, B2, B6, C, D, E and K), and it is considered one of the most important products and higher interest to the dairy industry due to great demand by the consumers. The diseases related to food consumption are considered one of the most significant problems. Several outbreaks related to microbiological contamination of ice cream have been reported in recent decades in Asia, Europe and America. It is believed that the ice cream, as a frozen food, presents no risk to the population health. However, it is considered an excellent environment for the growth of microorganisms due to its composition, pH close to neutrality and long storage period. The aim of this study was to evaluate the microbiological, sensory and physicochemical aspects of ice cream. The ice cream samples were irradiated with gamma rays (60Co) with the doses of LOkGy, 2.0kGy, 3.0kGy and 4.0kGy. The samples intended for the inoculation of Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 11229) and Salmonella abaetetuba (ATCC 35640) have been irradiated with doses of 1.0, 2.0 and 3.0kGy. It can be concluded that the dose of 3.0kGy was adequate to reduce most of the studied microorganisms to undetected levels. The use of gamma radiation affected the texture and the parameters of the colorimetric analyses of the ice cream. The results of the sensorial analyses showed that the better accepted dose was 3.0kGy. (author)

  13. In vitro evaluation of the chemical and morphological changes of the enamel surface using different bleaching techniques; Avaliacao in vitro das alteracoes quimica e morfologica da superficie do esmalte utilizando diferentes tecnicas de clareamento dental

    Energy Technology Data Exchange (ETDEWEB)

    Mattos, Alessandra de Siervi

    2003-07-01

    'In vitro' evaluation through MEV and EDS of the morphological and chemical changes, respectively, of the bovine enamel, submitted to different bleaching techniques. For the MEV evaluation eighteen apical thirds were pigmented and divided into two parts. One half of each sample was the control and the other half was bleached according to the protocol of each test group (n= 6). Group I - home bleaching with a 10% carbamide peroxide; group II bleaching with 35% hydrogen peroxide and LED; group III - bleaching with 35% hydrogen peroxide with diode laser bleaching. The same procedure was done with the eighteen samples which were analyzed through EDS and which had their buccal surface grinded and polished before the bleaching procedure in order to obtain more precise values of the fraction of calcium and phosphorus. The results showed no morphological changes among the analyzed control halves and the bleached halves. There was not a statistical significant difference about Ca and P values, among the control halves and the bleached halves regarding the chemical components (p< 0,05). (author)

  14. Irradiation effects of GaAlAs ({lambda}=830 nm) laser on oral traumatic ulceration; Avaliacao dos efeitos da irradiacao de ulceras traumaticas na cavidade bucal com o laser de GaAlAs ({lambda}=830 nm)

    Energy Technology Data Exchange (ETDEWEB)

    Senna, Andre Machado de

    2003-07-01

    Low intensity GaAlAs ({lambda}=830 nm) laser irradiation effects on oral traumatic ulceration were evaluated. For this purpose, twenty patients presenting orthodontic appliance - induced oral traumatic ulceration were randomly distributed in two groups. Patients in group 1 were submitted to the irradiation procedure and group 2 was the control one. The irradiation parameters employed were the following: wavelength 830 nm, one single application of 4 J/cm{sup 2}, punctual in the contact mode and 30 mW power. The control group received the conventional treatment, consisting on topical application of Triancinolon based ointment four times a day. For both groups the agent responsible for the trauma was removed or covered with utility wax whenever removal was impossible. The results were evaluated concerning the wounds size reduction and pain relief. The time of laser irradiation was considered the starting time (time zero) and analysis were done 24 hours, 48 hours and seven days after that. The statistical analysis showed an acceleration in the healing process as well accentuated pain reduction for the irradiated group compared to the control one. These evidences allows us to indicate this protocol of one single application of 4 J/cm{sup 2} as therapy when patients with oral traumatic ulceration can not attend several sessions for a multiple application procedure. (author)

  15. Evaluation of the environmental equivalent dose rate using area monitors for neutrons in clinical linear accelerators; Avaliacao da taxa de equivalente de dose ambiente utilizando monitores de area para neutrons em aceleradores lineares clinicos

    Energy Technology Data Exchange (ETDEWEB)

    Salgado, Ana Paula; Pereira, Walsan Wagner; Patrao, Karla C. de Souza; Fonseca, Evaldo S. da, E-mail: asalgado@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Batista, Delano V.S. [Instituto Nacional do Cancer (INCa), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    The Neutron Laboratory of the Radioprotection and Dosimetry Institute - IRD/CNEN, Rio de Janeiro, Brazil, initiated studies on the process of calibration of neutron area monitors and the results of the measurements performed at radiotherapy treatment rooms, containing clinical accelerators

  16. Evaluation of radiochemistry purity and p H of radiopharmaceuticals in nuclear medicine services at Pernambuco, Brazil; Avaliacao da pureza radioquimica e pH de radiofarmacos em servicos de medicina nuclear de Pernambuco, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Wellington; Lima, Fabiana Farias de, E-mail: falima@cnen.gov.b [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Santos, Poliane A.L.; Lima, Fernando Roberto de Andrade; Lima, Fabiana Farias de, E-mail: fflima@cnen.gov.b [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2011-07-01

    Radiopharmaceuticals are cellular or molecular structures that have a radionuclide in its composition and they are used for diagnosing or treating diseases. The evaluation of the radiochemical purity of radiopharmaceuticals is essential to produce images with artifacts free, as well as avoid unnecessary absorbed dose to the patient. Since they are administered in humans is important and necessary that they undergo rigorous quality control. Due to this fact, the norm in ANVISA RDC 38/2008 declaring the mandatory completion of a minimum of tests in routine nuclear medicine services before human administration. (author)

  17. Evaluation of the potential application of 2-acetylpyridine N4- phenyl thiosemicarbazones derivatives for cancer therapy and diagnosis; Avaliacao da potencial aplicacao de derivados de 2-acetilpiridina N-4 fenil tiossemicarbazonas em terapia e diagnostico oncologico

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Marcella Araugio

    2013-08-01

    Despite the wide range of antineoplastic agents available, resistance of some types of cancer and toxicity to normal cells have been identified as the main causes of treatment failure and death. The lack of early and precise diagnosis is also responsible for reducing survival of cancer patients. In this context, the development of substances with low toxicity and therapeutic potential and/or diagnosis purpose, is the major tool in an attempt to increase the survival of patients and assure the safety and efficacy of treatment. Thiosemicarbazones (TSC) are a class of synthetic compounds that have several biological activities, including antitumor. Although several studies have shown the great potential of TSC as therapeutic and / or diagnostic agents, different chemical modifications performed on this class of molecules indicate new possibilities for applications and still require further studies. The objective of this study was to evaluate the potential applicability of 2-acetylpyridine N-4-phenyl thiosemicarbazones derivatives for cancer therapy and diagnosis. The results showed that all 13 TSC tested were cytotoxic to breast and glioblastoma tumor cell lines, presenting higher in vitro antitumor activity than etoposide, an antineoplastic and inhibitor of topoisomerase II frequently used for cancer therapy. The TSC that have halogen or nitro on ortho position showed higher antitumor activity in vitro than their isomers with halogen or nitro on meta or para position of the phenyl group. H2Ac4oFPh and H2Ac4oClPh compounds showed the highest antitumor activity among all tested compounds, with IC{sub 50} in nanomolar order. These TSC induced cell death by apoptosis and oxidative stress was responsible, at least in part, for this type of cell death. The 5 mg.kg{sup -1} H2Ac4oFPh dose, administered s.c., for 4 consecutive days, did not induce important toxicity; however, the same treatment protocol was not effective for tumor growth reduction in an animal model of brain tumor. Radioactive probes of H2Ac4oFPh were synthesized using {sup 111}In or {sup 67}Ga as radiotracers, with satisfactory specific activity and radiochemical purity. H2Ac4oFPh-{sup 111}In was more useful than H2Ac4oFPh-{sup 67}Ga, with higher specific activity, better chemical purity, better in vitro stability, higher distribution volume, faster blood clearance and, therefore, was considered the most promising for application in molecular imaging studies. H2Ac4oFPh-{sup 111}In also showed high lipophilicity and was internalized by glioblastoma cells in vitro. H2Ac4oFPh-{sup 111}In showed significative tumor uptake in vivo, however, the high abdominal uptake and high background did not allow a good visualization of tumor in imaging studies. Unlike intravenous administration, intratumoral administration allowed greater diffusion and retention of H2Ac4oFPh-{sup 111}In in the tumor site and significantly reduced the activity accumulated in the organs. These results encourage new experiments to be performed in order to promote the complexation of H2Ac4oFPh with particle emitters, such as yttrium-90, to evaluate its application in local radioisotopic therapy for glioblastoma multiforme. (author)

  18. Evaluation of occupational exposure to chemicals in research and development laboratories in the petrochemical industry; Avaliacao da exposicao ocupacional a substancias quimicas em laboratorios de pesquisa e desenvolvimento na area petroquimica

    Energy Technology Data Exchange (ETDEWEB)

    Rebelo, Paulo Antonio de Paiva [Seguranca, Meio Ambiente, Eficiencia Energetica e Saude (SMES). Gerencia de Saude (Brazil)], e-mail: prebelo@petrobras.com.br; Coeli, Medina [Unidade de Negocio de Exploracao e Producao do Rio de Janeiro (UN-RIO). Gerencia de Seguranca(Brazil)], e-mail: leo.medina@petrobras.com.br; Rosa, Henrique Vicente Della; Nascimento, Elizabeth de Souza [Universidade de Sao Paulo (USP). Faculdade de Ciencias Farmaceuticas (Brazil)], e-mails: hdellarosa@toxikon.com, esnasci@usp.br

    2009-04-15

    A sectional study was conducted on workers in 137 laboratories, 30 pilot units and support areas of a research center in order to evaluate the level of occupational exposure based on environmental measurements from the 2004's workplace environmental protection program with the aim of assessing the risk of health injury arising from occupational exposure to chemical agents. The recognition task was developed using interviews and secondary data from safety programs covering health and environmental risks of all procedures, facilities / equipment and activities. 2,738 cases of exposure were identified, involving exposure to 484 chemicals (with 246 agents and 238 chemicals mixtures), ranging in purity and concentration, found in 243 jobs. The target population comprised 1,563 workers exposed to chemical agents, subdivided into 168 different Homogeneous Group of Expose with an average of 4.55 employees per group. In each workplace were identified, on average, 4.91 HGE and, on average, 3.73 chemicals. Regarding the 2,738 cases of chemical agents versus activity, in 14% of the cases (382 cases) there was daily exposure, in 82.1% (2,249 cases) the frequency of use varied from two to three times a week and in the remaining 3.9% (107 cases) the use was sporadic, about once a week or less. Nine of the ten most frequently used substances were hydrocarbons. 977 samples (485 samples of chemicals and 492 samples of benzene) were measured. Out of the total number of measurements taken, 91.9% of the evaluations corresponding to 92.5% of workers who work with chemicals, presented environmental measurement results below the action level, demonstrating, therefore, exposure to low concentrations.Chemical were found in most areas of work and accounts for 81% of occupational exposure in the evaluated laboratories. There is evidence of presence of one given substance in various locations, as well as of a great diversity of frequently used chemicals, since in every workplace 3.73 chemicals on average were identified, ranging from 1 to 12 and 96.1% of cases. Exposure to a given substance occurs at least every three days; in 14% of cases it happens on a daily basis, involving 71.5% of chemicals. In the study group, 59% of workers remain in business for over ten years, undergoing exposure for a long time (chronic). (author)

  19. Evaluation of the toxicity of the methanolic extract of Caesalpinia Pyramidalis, subjected to gamma radiation, compared to saline artemias; Avaliacao da toxicidade do extrato metanolico de Caesalpinia Pyramidalis, submetido a radiacao gama, frente a artemias salinas

    Energy Technology Data Exchange (ETDEWEB)

    Pessoa, Juanna G.; Santos, Mariana L.O.; Costa, Michelle C.A.; Siqueira, Williams N.; Silva, Luanna R.S.; Cabral, Daniela L.V.; Amancio, Francisco F.; Melo, Ana M.M.A., E-mail: marianasantos_ufpe@hotmail.com [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2013-07-01

    The present study aimed to investigate the possible effect of irradiation of 60 Co in methanol extract of Caesalpinia pyramidalis (catingueira) with function of reducing the toxicity of the extract at concentrations of 1000, 500, 250 and 125 ppm irradiating them with doses of 5 kGy 7 kGy and 10 kGy, using lethality tests with saline Artemias.

  20. Technetium-99m labeling and fibronectin binding ability of Corynebacterium diphtheriae; Marcacao de Corynebacterium diphtheriae com Tecnecio-99m e avaliacao da capacidade de ligacao a fibronectina de plasma humano

    Energy Technology Data Exchange (ETDEWEB)

    Souza, S.M.S.; Nagao, P.E.; Bernardo-Filho, M. [Universidade do Estado do Rio de Janeiro, RJ (Brazil). Inst. de Biologia Roberto Alcantara Gomes; Pereira, G.A.; Napoleao, F.; Andrade, A.F.B.; Hirata Junior, R.; Mattos-Guaraldi, A.L. [Universidade do Estado do Rio de Janeiro, RJ (Brazil). Faculdade de Ciencias Medicas

    2004-04-15

    The use of radionuclides has permitted advances in areas of clinical and scientific knowledge. Several molecules and cells have been labelled with Technetium-99m ({sup 99m}Tc). The stannous chloride (SnCl{sub 2}) has a significant influence on the labeling and stability of {sup 99m}Tc radiotracers. The frequent risk of diphtheria epidemics has intensified interest in the virulence factors of Corynebacterium diphtheriae. Although studies have looked at potential adhesins including haemagglutinins and exposed sugar residues, the molecular basis of mechanisms of adherence remains unclear. Adherence of pathogens to mammalian tissues may be mediated by fibronectin (FN) found in body fluids, matrix of connective tissues, and cell surfaces. In the present study we evaluated the binding ability to human plasma FN by {sup 99m}Tc labeled-C.diphtheriae. Due to adverse effects of stannous ions, microorganisms were submitted to survival and filamentation induction assays. Data showed a dose dependent susceptibility to SnCl{sub 2} bactericidal effects. Cell filamentation was observed for concentrations of SnCl{sub 2} > 110 {mu}g/ml. Adherence levels of {sup 99m}Tc labelled 241strain to coverslips coated with 20 {mu}g/ml FN were higher (P = 0.0037) than coated with bovine serum albumin. FN binding by the sucrose fermenting 241 C. diphtheriae strain (8.9% + 2.6) was significantly lower (P=0.0139) than Staphylococcus aureus Cowan I strain (34.1% {+-} 1.2). Therefore, bacterial {sup 99m}Tc labeling represents an additional tool that may contribute to the comprehension of C. diphtheriae interactions with host receptors such as FN that act as biological organizers by holding bacterial cells in position and guiding their migration. (author)

  1. Development of a methodology for the evaluation of energy efficiency of central irrigation pivots; Desenvolvimento de uma metodologia para a avaliacao da eficiencia energetica de pivos centrais de irrigacao

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Aureo Cezar de [Centro Federal de Educacao Tecnologica de Petrolina (CEFET-Pet), PE (Brazil); Guimaraes Junior, Sebastiao Camargo; Camacho, Jose Roberto; Salerno, Carlos Henrique [Universidade Federal de Uberlandia (NERFAE/UFU), MG (Brazil). Fac. de Engenharia Eletrica. Nucleo de Eletricidade Rural e Fontes Alternativas de Energia

    2006-07-01

    It will be presented in this work a methodology for the evaluation of the energy efficiency of irrigation center systems by central pivot. Integrating water efficiency application with the energy associated to the sprinklers, adduction pipeline, pivot arm and pump systems, the proposed indexes make possible to evaluate the energy income of each component of the irrigation system, contributing for the increase of the global efficiency of the irrigated agriculture. (author)

  2. Electricity cogeneration evaluation from cane bagasse in gasifier systems/gas turbine; Avaliacao da cogeracao de eletricidade a partir de bagaco de cana em sistemas de gaseificador/turbina a gas

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira

    1992-07-01

    Before the beginning of PROALCOOL in 1975, the first effective program in the world using biomass in large scale as an automotive fuel, sugar/alcohol industries already used sugar cane bagasse - a by-product of sugar/alcohol production - to generate energy for sugar production. Currently, besides the fact that they are self-sufficient in thermal/electrical energy, sugar/alcohol industries produce small electricity excess which is exported to local utilities. Gasifier/gas turbine systems are more advanced technologies which are being developed and shall be commercialized in eight to ten years approximately, presenting much higher efficiency, at low cost and inducing more exportable electricity. In this study, possibilities of gasifier/gas turbine systems are evaluated and projections of bagasse based electricity production are presented, until year 2010, for Sao Paulo state and Brazil. Generation costs of gasified bagasse based electricity are calculated: they shall be lower than electricity cost from fossil origin. Influence of electricity sale on the reduction of alcohol production cost are also evaluated for several opportunity costs of bagasse. Environmental and social impacts are analyzed, including evaluation of the cost of avoided carbon, related to the substitution of fossil fuel by sugar cane bagasse in thermoelectric power plants. (author)

  3. Reduction of ANGRA{sub 1} reactor hot leg temperature: neutronic, operational and safety evaluation; Reducao da temperatura das pernas quentes de Angra-1: avaliacao neutronica, operacional e de seguranca

    Energy Technology Data Exchange (ETDEWEB)

    Ponzoni Filho, Pedro; Sato, Sadakatu [Universidade Federal, Rio de Janeiro, RJ (Brazil). Fundacao Universitaria Jose Bonifacio

    2000-07-01

    The aim of the reduction of Angra 1 NPP hot leg temperature (T{sub hot}) is to reduce the potential for the initiation and propagation of primary water stress corrosion cracking (SCC) in steam generator (SG) tubes. Many nuclear power plants are operating with reduced T{sub hot} because it has been demonstrated that SG tubes SCC is associated with increased water temperature. This paper is a summary of a full design, made of 6 tasks: determination of new primary thermodynamic parameters; calculation of nuclear parameters that are used as input in accident and transient analysis, for reduced T{sub hot}; safety evaluation of all accidents and transients of Final Safety Analysis Report (FSAR); safety evaluation of other transients; plant operation evaluation and reactor Protection System evaluation. The goals and conclusions of the full design are provided in this paper. (author)

  4. HDPE/LLDPE blend-based nanocomposites - Part I: evaluation of thermo-mechanical properties and weathering resistance; Nanocompositos de blendas HDPE/LLDPE e OMMT - parte I: avaliacao das propriedades termo-mecanicas e da resistencia ao intemperismo

    Energy Technology Data Exchange (ETDEWEB)

    Passador, Fabio R.; Backes, Eduardo H.; Travain, Daniel R.; Ruvolo Filho, Adhemar; Pessan, Luiz A., E-mail: fabiopassador@gmail.com [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil). Departamento de Engenharia de Materiais

    2013-07-01

    Nano composites from high density polyethylene/ linear low density polyethylene (HDPE/LLDPE) blends were prepared at the melt state in an extruder, using HDPE-g-MA as compatibilizer agent. The structural characterization was performed through wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM). The results showed that adding the compatibilizer induced formation of a predominant intercalated microstructure. Dynamic-mechanical studies showed that the addition of the compatibilizer increases the interactions between the nano clay surface and the polyolefin matrix. The weathering conditions affected the mechanical behavior of HDPE/LLDPE blend-based nano composites. Both treatments performed in hot water and in a forced convection air oven provided the relief of residual stresses in the polymer matrix, while the treatment in an accelerated aging chamber provided the formation of carbonyl groups that lead to a decreased degree of crystallinity and elastic modulus of the nanocomposites. (author)

  5. Study of uptake and endocytosis of gamma rays-irradiated crotoxin by mice peritoneal macrophages; Avaliacao do mecanismo de captacao e endocitose de crotoxina submetida a acao da radiacao, por macrofagos peritoneais de camundongos

    Energy Technology Data Exchange (ETDEWEB)

    Cardi, Bruno Andrade

    1999-07-01

    The purpose was to investigate the uptake and endocytosis of 2000 Gy {sup 60}Co irradiated crotoxin through mouse peritoneal macrophages, correlating with native one and another non related protein, the ovalbumin. Native (CTXN) or 2000 Gy {sup 60} Co {gamma}-rays (dose rate 540 Gy/hour) irradiated crotoxin (CTXI) or ovalbumin processed of same manner (OVAN - OVAI) were offered to mouse peritoneal macrophages and their uptake was evaluated by immunohistochemistry and quantitative in situ ELISA. The involvement of scavenger receptors (ScvR) was evaluated by using blockers drugs (Probuco-PBC or Dextran Sulfate - SD) or with nonspecific blocking using fetal calf serum (FBS). The morphology and viability of macrophages were preserved during the experiments. CTXI showed irradiation-induced aggregates and formation of oxidative changing were observed on this protein after gamma rays treatment. By immunohistochemistry we could observe heavy stained phagocytic vacuole on macrophages incubated with CTXI, as compared with CTXN. Quantitatively by in situ ELISA, the sema pattern was observed, displaying a 2-fold CTXI incorporation. In presence of PBC or SD we could find a significant decrease of CTXI uptake but not of CTXN. However the CTXN uptake was depressed by FBS, not observed with CTXI. OVA, after gamma rays treatment, underwent a high degradation suffering a potent incorporation and metabolism by macrophages, with a major uptake of OVAI in longer incubation (120 minutes). Gamma rays ({sup 60} Co) produced oxidative changes on CTX molecule, leading to a uptake by ScvR-mice peritoneal macrophages, suggesting that the relation antigen-presenting cells and gamma rays-modified proteins are responsible for the better immune response presented by irradiated antigens. (author)

  6. Microstructural evaluation of Ti-35Nb-7,5 T alloy deformed by cold rolling and annealed; Avaliacao microestrutural da liga Ti-35Nb-7,5Ta deformada por laminacao a frio e recozida

    Energy Technology Data Exchange (ETDEWEB)

    Giudice, M.L.C.; Hayama, A.O.F.; Button, S.T.; Caram, R., E-mail: mlcgiudice@fem.unicamp.b [Universidade Estadual de Campinas (DEMA/FEM/UNICAMP), SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Engenharia de Materiais

    2010-07-01

    This work presents the main results of microstructural characterization of Ti- 35Nb-7.5Ta (% in weight) deformed by cold rolling and annealed. Samples were obtained by electric arc melting, heat treated at 1000 deg C for 8 hours and water quenched. Samples were deformed by cold rolling in multiple passes up to a maximum reduction of 84%. Deformed samples were encapsulated in quartz under vacuum and annealed at 600, 700 e 800 deg C, in variable times and water quenched. Characterization was carried out using light optical microscopy, X-ray diffraction, Vickers hardness test and acoustic emission measurements to determine the Young's modulus. The results show the orientation occurrence of the martensitic phase in relation to the cold rolling direction in deformed samples. In samples annealed at 600 deg C recovery is predominant and samples annealed at 800 deg C for 60 min are fully recrystallized. (author)

  7. Simulation and evaluation of mammography quality from an X-ray equipment of a instrument calibration laboratory; Simulacao e avaliacao das qualidades da mamografia do equipamento de raios-x de um laboratorio de calibracao de instrumentos

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Natalia F. da; Castro, Maysa C. de; Caldas, Linda V.E., E-mail: na.fiorini@gmail.com, E-mail: maysadecastro@gmail.com, E-mail: lcaldas@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2014-07-01

    The Instrument Calibration Laboratory (ICL) of the Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP, Brazil has developed some work in order to establish a primary standard system for low energy X-ray employing a ionization chamber of free air. For this, one of the most important steps is the determination of factors of correction of its answer. Simulation is a frequently used tool for this because some correction factors can not be determined experimentally. For the correct simulation of these correction factors is necessary some input parameters such as geometry, the material composition of the dosimeter, the experimental arrangement and the radiation source are specified correctly. For the ionization chamber available on the LCI, the geometry, the material components and the experimental arrangement can be obtained easily. On the other hand, spectrum of radiation energy source, which must be inserted into the computer code has not been obtained. Thus, this study aims to determine this radiation spectrum, thus enabling the characterization of the new primary standard for low power X-radiation of ICL.

  8. {sup 222} Rn exposure assessment in the caves of Parque Estadual Turistico do Alto Ribeira (PETAR); Avaliacao da exposicao ao {sup 222} Rn nas cavernas do Parque Estadual Turistico do Alto Ribeira (PETAR)

    Energy Technology Data Exchange (ETDEWEB)

    Alberigi, Simone

    2006-07-01

    In the present work, radon concentrations in six caves of PETAR - Parque Estadual Turistico do Alto Ribeira (High Ribeira River Touristic State Park) were carried out with Makrofol E solid state nuclear track detectors (SSNTD) and used to assess the annual effective dose received by regional tour guides. The park has four visitation centers: Santana, Ouro Grosso, Caboclos e Casa de Pedra and receives nearly 40,000 people annually. The caves evaluated were Couto, Agua Suja, Laje Branca, Morro Preto and Santana, from Santana center and Alambari de Baixo from Ouro Grosso center, for being the most frequently visited caves. The exposure period of the SSNTD was, at least, three months, over a period of 26 months, from October 2003 to November 2005.The {sup 222}Rn concentrations lay in a range from 153 Bq.m{sup -3} to 6607 Bq.m{sup -3} and we observed that, in general, for chilly weather, the radon levels decrease. The annual effective dose, considering the most realistic scenario, with geometric mean concentrations, an equilibrium factor of 0.5 and annual exposure time for each cave, varied from 0.2 mSv.a{sup -1} for the Couto cave, strongly ventilated, to 4.0 mSv.a{sup -1} for the Santana cave, the most frequently visited and no external communication. For the worst scenario, with arithmetic mean concentrations, equilibrium factor 1 and annual exposure time for all caves, the annual effective dose was 16.1 mSv.a{sup -1}. All assessed effective doses received by the tour guides are bellow 20 mSv.a{sup -1} suggested as an annual effective dose limit for occupational exposure by the International Commission of Radiological Protection (ICRP 60, 1990). (author)

  9. Building and cities. Study of energetical demand in Lisbon; Os edificios e a Cidade estudio de avaliacao das necessidades energeticas dos edificios no espaco urbano, o caso da cidades de lisboa

    Energy Technology Data Exchange (ETDEWEB)

    Goncalves, H. P.; Panao, M. O.; Camelo, S. L.; Graca, J. M.; Ramalho, A. F.; Aguilar, R.

    2004-07-01

    The evaluation of the building thermal performance in an urban environment was undertaken in Lisbon city (Portugal) within the frame of ACLURE Project (Built Environment, Urban Climate and Rational Use of Energy) (Goncalves et al, 2004). In order to reveal the main parameters that affect the building thermal behavior, an experimental survey of the dwellings and the urban climate was performed and modeling facilities were also used. While the experimental results allow to infer how the dwellings interact with the urban climate, the modeling analysis estimate the average annual energy demands for different geographical and morphological conditions, namely by the canyon height- to-with ratio (H/W). (Author)

  10. Strategic environmental assessment of Brazil's ethanol expansion: a methodological proposal and its preliminary application; Avaliacao ambiental estrategica da expansao de etanol no Brasil: uma proposta metodologica e sua aplicacao preliminar

    Energy Technology Data Exchange (ETDEWEB)

    Oberling, Daniel Fontana

    2008-03-15

    The main objective of this dissertation is to adapt the methodology of Strategic Environmental Assessment (SEA) to the case of ethanol fuel production in Brazil. The results are be utilized in decision-making processes as well as in the discussion on future tendencies of risks and opportunities regarding the development of ethanol as the principal renewable liquid fuel. Taking into account the international experiences of countries with a tradition in sectoral planning, SEA is found to be the instrument in public environmental management that can most adequately consider the environmental variable - beginning already at the planning stage of the ethanol industry, a necessity that has strongly unfolded itself following the deregulation of the sector in Brazil. The conflicts that may emerge from large ethanol production surpluses for export are also identified through the application of specifically designed indicators. (author)

  11. An evaluation of the participation of the social movements on the decision making process and planning of the electric sector; Uma avaliacao da participacao dos movimentos sociais no planejamento e no processo decisorio do setor eletrico

    Energy Technology Data Exchange (ETDEWEB)

    Moral Hernandez, Francisco del; Bermann, Celio [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-graduacao em Energia]. E-mail: delmoral@hotmail.com; cbermann@iee.usp.br

    2006-07-01

    This work presents some reflexions on the possibility of a public sphere in the decision making process in the energetic sector. By using the conceptual mark of Juergen HABERMAS, some reflexions on the political participation specificities at Latin America, mainly those ones suggested by AVRITZER (2002) and the theoretical reflexions of HONNETH (2003) recognition fight and construction in the social movements, the work tries the verification of how far the requirements of social organizations identified in this work are from a desirable situation, or else a more effective participation of the social movements on the decisions and planning spaces and the deliberative character of the public discussion space in the area of energy.

  12. Effects of JPEG data compression on magnetic resonance imaging evaluation of small vessels ischemic lesions of the brain; Efeitos da compressao de dados JPEG na avaliacao de lesoes vasculares cerebrais isquemicas de pequenos vasos em ressonancia magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Kuriki, Paulo Eduardo de Aguiar; Abdala, Nitamar; Nogueira, Roberto Gomes; Carrete Junior, Henrique; Szejnfeld, Jacob [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem]. E-mail: paulokuriki@gmail.com

    2006-01-15

    Objective: to establish the maximum achievable JPEG compression ratio without affecting quantitative and qualitative magnetic resonance imaging analysis of ischemic lesion in small vessels of the brain. Material and method: fifteen DICOM images were converted to JPEG with a compression ratio of 1:10 to 1:60 and were assessed together with the original images by three neuro radiologists. The number, morphology and signal intensity of the lesions were analyzed. Results: lesions were properly identified up to a 1:30 ratio. More lesions were identified with a 1:10 ratio then in the original images. Morphology and edges were properly evaluated up toa 1:40 ratio. Compression did not affect signal. Conclusion: small lesions were identified ( < 2 mm ) and in all compression ratios the JPEG algorithm generated image noise that misled observers to identify more lesions in JPEG images then in DICOM images, thus generating false-positive results.(author)

  13. Radiation effects evaluation for electrons sheaf in packages resistance in a Lasioderma serricorne, Plodia interpunctella and Sitophilus zeamais; Avaliacao dos efeitos da radiacao por feixe de eletrons na resistencia de embalagens a Lasioderma serricorne, Plodia interpunctella e Sitophilus zeamais

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Juliana Nazare

    2011-07-01

    The plagues of stored products consist of a man problem, depreciating products and causing economical damages. Among these curses we have Lasioderma serricorne (F. 1792), Sitophilus zeamais (M. 1855) and Plodia interpunctella (H. 1813) known by infesting stored products as: grains, brans, flours, coffee, tobacco, dried fruits and spices. These curses perforate and penetrate the packages, ovipositing over the substratum. In this context the package plays a fundamental part, preventing the contact and curses' proliferation in the packed product. So, to protect the packed product and to prolong its shelf life, the package should have good mechanical resistance to tension and perforation, good sealing, good barrier properties and should not transfer odors nor strange flavors to the packed product. The ionizing radiation can cause structural changes in polymer packages, these changes are caused by the scission processes and reticulation of the polymers chains. These are concurrent processes and the predominance of one over the other depends on the chemical structure of the polymer, the irradiation conditions and specific factors of the material that will absorb the energy. This work had the objective to evaluate the changes in mechanical properties of package structures used to store granola, cereal bar and pasta, as well as its resistance to perforation by L. serricorne, P. interpunctella and S. zeamais, when submitted to electrons sheaf radiation. In this methodology were used five structures of commercially utilized packages to store granola, cereal bar and pasta composed by (Polypropylene bi-oriented metallic/Polypropylene bi-oriented coextruded - BOPPmet/BOPP 50 {mu}m), (Polypropylene bi-oriented/Polypropylene - BOPP/PP 50 {mu}m), Poli (ethylene terephthalate) metallic/Polypropylene bi-oriented coextruded - PETmet/BOPP 32 {mu}m), Poli (ethylene terephthalate) /Polypropylene - PET/PP1 72 {mu}m), Poli (ethylene terephthalate)/Polypropylene - PET/PP2 32 {mu}m). The structures of packaging were submitted to radiation doses between 0, 10, 20 and 60 kGy, in one electron accelerator of 1,5 M and V, 25 mA and 37,5 kW, dose tax of 11,22 kGy / s, room temperature and air presence . Eight days, Two and Six months after irradiations, mechanical resistance experiment were accomplished to tension and elongating in rupture, sealing resistance and perforation resistance, all based in respective ASTM norms. The perforation experiment by insects were realized in an acclimatized room, where irradiated samples in doses of 0, 10, 20 and 60 kGy were sealed containing 40 g of granola, 40 g of pasta and cereal bar in number of nine by experiment, and equally divided in three plastic screened boxes by studied dose. In each box 20 adults of each insect were added in for 60 days, when the packages were evaluated to verify possible perforations. The differences between the sample results were statistically evaluated by ANOVA (p<0.05). The results showed that concerning the perforation resistance by L. serricorne, P. interpunctella and S. zeamais the polymeric structures evaluated showed low resistance by insects perforation before and after the treatment. BOPPmet/BOPP (50 {mu}m), PETmet/BOPP (32 {mu}m), PET/PP1 (72 {mu}m) and PET/PP2 (32 {mu}m) structures showed significant losses in mechanical properties studied. The BOPP/PP (50 {mu}m) showed the best set of answers in mechanical properties to the radiation treatment with electrons sheaf up to 10 kGy doses. Among the mechanical properties evaluated, sealing was the most affected by ionizing radiation, has shown, in general, increasing losses with radiation dose. (author)

  14. Reliability assessment of permanent downhole monitoring systems (PDG/TPT) in Marlim Field; Avaliacao da confiabilidade de sistemas de monitoramento permanente de fundo de pocos (PDG/TPT) no Campo de Marlim

    Energy Technology Data Exchange (ETDEWEB)

    Frota, Helder Mamede; Destro, Wagner [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    This work is related to the reliability engineering, specifically, to the analysis of data lifetime and to the failure modeling of Permanent Downhole Gauge monitoring systems (PDG/TPT) in Marlim field, Campos Basin. These systems are composed of pressure and temperature sensors installed in oil wells and connected, by umbilicals, to their production platforms. The raising of the main failure causes in these systems, in 12-year operation, served as the basis to describe their driving parameters, foreseeing their behavior for the following years, considering the reliability theory of systems. It was obtained the pattern of the operations and extracted the wanted information: types and failure modeling, systems survival time and the Mean Time Between Failures (MTBF). This methodology permits the comparison among the components performance from several manufacturers. The results can be used in economical analysis, in oil field management, in maintenance prediction and in reliability studies. The area of failure modeling in association with these systems lifetime is the focus of this study. (author)

  15. Evaluation of peak voltage, irradiation time, output and half value layer in computed tomography equipment;Avaliacao da tensao de pico, tempo de irradiacao, rendimento e camada semi-redutora em equipamentos de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Nersissian, Denise Y.; Santos, Lucas R. dos; Saito, Ricardo H. [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia; Silva, Marcia C. [Hospital Albert Einstein (HAE), Sao Paulo, SP (Brazil)

    2009-07-01

    In this work, the voltage peak, the irradiation time, output and half value layer were evaluated in two multislice computed tomography equipment. These evaluations are commonly done in conventional, fluoroscopic and mammographic equipment, but not in computed tomography. The results have depicted that accuracy and reproducibility meet the 10% limit established by Portaria SVS MS 453/1998 and by Guia de Radiodiagnostico - RE 1016/2005. The half value layer is between (6.55 +- 0.31) mmAl and (7.70 +- 0.39) mmAl for 120 kVp on three bow tie filter positions. The output obtained for the isocenter position was 0.097, 0.158, 0.227 and 0.286 mGy/mAs for 80, 100, 120 e 135 kVp, respectively; being similar between two tomography equipment. Such evaluations have only been possible due to the intervention on the CT equipment, stopping the rotation of the X-ray tube inside the gantry. (author)

  16. Technical evaluation of biomass gasification technology integrated with combined cycle using bagasse as fuel; Avaliacao tecnica da tecnologia de gaseificacao de biomassa integrada a ciclos combinados utilizando bagaco como combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz, Pablo Silva; Venturini, Osvaldo Jose; Lora, Electo Silva [Universidade Federal de Itajuba (NEST/UNIFEI), MG (Brazil). Nucleo de Excelencia em Geracao Termeletrica e Distribuida], email: pablo.silvaortiz@gmail.com; Campo, Andres Perez [Universidade Automona de Bucaramanga (UNAB) (Colombia). Fac. de Engenharia Fisico- Mecanica, Engenharia em Energia

    2010-07-01

    Biomass Integrated Gasification Combined Cycle (BIGCC) was identified as an advanced technology with potential to be competitive for electricity generation. The BIGCC technology uses biomass and the sub products of some industrial sectors processing, like sugar cane, as feedstock. The current Brazilian energy matrix is mainly based on renewable generation sources, making it important to assess these gasification technologies in the production of sugar, ethanol and electricity. In this work, a technical evaluation of the technologies incorporated in BIGCC power plants is done: the gasification process and the combined cycle power plant. On the other hand, the generated costs of these systems are analyzed, and the potential for implementation in Brazil plants from sugar cane bagasse is studied, in which a 10% increase in efficiency is obtained. (author)

  17. Evaluation of parameters associated with UV/EB cured clearcoats degradation used in outdoor environment;Avaliacao da formacao e degradacao de filmes de vernizes curados por radiacao ultravioleta e feixe de eletrons e expostos ao envelhecimento acelerado

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz, Carmen Silvia Bentivoglio

    2003-07-01

    The materials curable by ultraviolet (UV) or electron beam (EB) radiation such as inks, adhesives and coatings are reactive compounds made up of resin, monomer, photoinitiator and additives which undergo polymerization and crosslinking under irradiation producing thermoset products. This technology has been used in a great variety of industrial applications, replacing the conventional curing process in the development of new products. One of the challenging applications has been to design weatherable radiation cured coating which maintain their desirable physical properties and aesthetic appearance. This research reports information about the behavior of four UV and EB curable clear coatings -with or without light stabilizer additives- under accelerated weathering. Thermogravimetry, differential scanning calorimetry, differential photo calorimetry, infrared and ultraviolet spectroscopy and tensile properties were used to evaluate these formulations. Clear coating 50 mum thick films were cured with UV and EB radiation at different doses. The UV curing process was carried out at room temperature using an UV tunnel, with a medium pressure mercury lamp and a transport belt with variable speed. The ultraviolet radiation doses were in the range of 50 to 1500 mJ cm{sup -2}. The EB curing process was performed under N{sub 2} atmosphere, with doses in the range from 1,6 to 300 kGy using the IPEN-CNEN/SP Dynamitron electron beam accelerator with energy of 1.5 MeV. The cure degree was determined by means of the residual reaction heat of the under cured samples obtained from photo-DSC or DSC measurements. The accelerated aging tests were carried out using a Weather-Ometer chamber with exposition times in the range of 100 to 3000 hours. The experimental data obtained from the photo-aged samples were evaluated and correlated to the formulation composition, type of radiation - UV or EB, radiation dose and residence time in the aging chamber. The results have shown that the EB cured films have a better resistance to photoinduced weathering effects than UV cured ones. UV/EB films with light stabilizers have shown larger stability than those counterparts with no additives. The aging effects were evaluated by parameters such as hardness, gloss, surface roughness, yellowness index and changes in the FTIR absorption bands. (author)

  18. Evaluation of parameters associated with UV/EB cured clearcoats degradation used in outdoor environment;Avaliacao da formacao e degradacao de filmes de vernizes curados por radiacao ultravioleta e feixe de eletrons e expostos ao envelhecimento acelerado

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz, Carmen Silvia Bentivoglio, E-mail: brazilruiz@comcast.ne

    2009-07-01

    The materials curable by ultraviolet (UV) or electron beam (EB) radiation such as inks, adhesives and coatings are reactive compounds made up of resin, monomer, photoinitiator and additives which undergo polymerization and crosslinking under irradiation producing thermoset products. This technology has been used in a great variety of industrial applications, replacing the conventional curing process in the development of new products. One of the challenging applications has been to design weatherable radiation cured coating which maintain their desirable physical properties and aesthetic appearance. This research reports information about the behavior of four UV and EB curable clear coatings -with or without light stabilizer additives- under accelerated weathering. Thermogravimetry, differential scanning calorimetry, differential photocalorimetry, infrared and ultraviolet spectroscopy and tensile properties were used to evaluate these formulations. Clear coating 50 {mu}m thick films were cured with UV and EB radiation at different doses. The UV curing process was carried out at room temperature using an UV tunnel, with a medium pressure mercury lamp and a transport belt with variable speed. The ultraviolet radiation doses were in the range of 50 to 1500 mJ cm{sup -2}. The EB curing process was performed under N{sub 2} atmosphere, with doses in the range from 1,6 to 300 kGy using the IPEN-CNEN/SP Dynamitron electron beam accelerator with energy of 1.5 MeV. The cure degree was determined by means of the residual reaction heat of the undercured samples obtained from photo-DSC or DSC measurements. The accelerated aging tests were carried out using a Weather-Ometer chamber with exposition times in the range of 100 to 3000 hours. The experimental data obtained from the photo-aged samples were evaluated and correlated to the formulation composition, type of radiation - UV or EB, radiation dose and residence time in the aging chamber. The results have shown that the EB cured films have a better resistance to photoinduced weathering effects than UV cured ones. UV/EB films with light stabilizers have shown larger stability than those counterparts with no additives. The aging effects were evaluated by parameters such as hardness, gloss, surface roughness, yellowness index and changes in the FTIR absorption bands. (author)

  19. Gallbladder emptying evaluation in calcific chronic pancreatitis using Tc-{sup 99m} DISIDA scintigraphy; Avaliacao do esvaziamento da vesicula biliar em portadores de pancreatite cronica calcificante, atraves do estudo cintilografico com Tc-{sup 99m} DISIDA

    Energy Technology Data Exchange (ETDEWEB)

    Pedroso, Martha Regina A.; Cunha, Renata M.; Guarita, Dulce R.; Buchpieguel, Carlos A.; Mott, Carlos B.; Laudanna, Antonio Atilio [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina

    1997-12-31

    The aim of this study was to analyze the gallbladder motor function in chronic pancreatitis (C) patients. Gallbladder emptying was evaluated in 11 patients, without and with addition of pancreatic extract and in ten controls. The results were compared and analyzed statistically. The ejection fraction (E F) of the gallbladder (GB) at 30, 45 and 60 minutes were calculated by using Tc-9 9 m DISIDA scintigraphy. The E F of GB at 60 minutes was significantly higher in the controls when compared to patients, although the results between patients were similar without and with addition of pancreatic extract. The results suggest that the delay in the GB emptying does not depend on the eventual alteration in the intestinal phase of the vesicular stimulation, but it probably results from a mechanic factor, which depends on the chronic pathological process located in the head of the pancreas. (author) 111 refs., 6 figs., 12 tabs.

  20. Study of the effect of ionizing radiation on composites based on PCL/PLLA and coconut fiber; Avaliacao dos efeitos da radiacao ionizante em compositos de PCL/PLLA com fibra de coco

    Energy Technology Data Exchange (ETDEWEB)

    Kodama, Yasko

    2011-07-01

    Plastic solid waste has become a serious problem recently concerning environmental impact. In this scenario, preparation of polymers and composites based on coconut husk fiber would lead to a reduction on the cost of the final product. Additionally, it will reduce the amount of agribusiness waste disposal in the environment. In Brazil, coconut production is around 1.5 billion fruits by year in a cultivated area of 2.7 million hectares, but the coconut husk fiber has not been used much for industrial applications. Moreover, biodegradable polymers have attracted the attention of the most part of population, due to the environmental issues arising from the increasing use of polymeric materials of low degradability discharged as waste residue. Besides, when considering an application in the medical field, it is necessary that the products are sterilized and, ionizing radiation is widely used to sterilize medical and surgical devices. In this work, it was studied blends and composites based on two commercial polymers: poly (e-caprolactone), PCL, and poly (lactic acid), PLLA, and coconut fiber. Those polymers are biodegradable as well as biocompatible, so it is important to know the effect of ionizing radiation in these materials. Samples were irradiated with gamma rays from {sup 60}Co source and electron beam with radiation doses ranging from 10 kGy up to 1 MGy. The non-irradiated and irradiated samples were studied using several analytical techniques and characterization assays that allowed understanding their properties in order to enable their application as precursors for medical and surgical devices. Thermal stability of non irradiated and irradiated composites up to 100 kGy radiation dose is not affected significantly by the coconut fiber incorporation to the polymeric matrix. Acetylation of fibers was not effective in order to induce any interaction between fibers and polymeric matrix, as expected. That was verified by the slight reduction of stress strength observed in the composites specimens. Besides that, this reduction did not affect negatively mechanical properties of blends compared to the composites. Ionizing radiation neither promoted detectable interaction between polymeric matrix and fibers. Cytotoxicity tests indicated that lixiviation products from homopolymers, blend and composites did not release sufficient amount of substances to induce significant cellular death. Thermal processing used to obtain composites and previous acetylation by chemical treatment contributed to the bioburden reduce. Furthermore, reducing initial bioburden it was possible to diminish radiation doses needed to perform sterilization. Enzymatic and soil degradation were not negatively affected by radiation processing. Even though fiber incorporation to the polymer blend slightly reduced degradation process, composites continued degrading through time. Artifacts produced by means of the materials studied here can be radiation processed with doses up to 100 kGy without prejudice of their biodegradability. (author)

  1. Methodology to evaluate the energy associated to the industrial solid wastes: application in a metropolitan region of Campinas, Sao Paulo state, Brazil; Metodologia para avaliacao da energia associada ao residuo solido industrial: aplicacao a regiao metropolitada de Campinas

    Energy Technology Data Exchange (ETDEWEB)

    Batista, Tereza Rosana Orrico [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Curso de Pos-graduacao em Planejamento de Sistemas Energeticos; Teixeira, Egle Novaes [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Civil, Arquitetura e Urbanismo; Silva, Ennio Peres da [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico. Lab. de Hidrogenio

    2004-07-01

    The aim of this work is to the application of a methodology to evaluate the energy associated to the industrial solid wastes in the metropolitan region of Campinas. The methodological route proposed is: the characterization of the research area and the production/management of the industrial solid wastes; the energetic classification and the qualitative/quantitative research of the energy associated to the industrial solid wastes; and, the valuation of the applicability of the energetic utilization mechanisms proposed to the region. This methodology when applied at the Campinas metropolitan region proved to be valid and it resulted in a synthetically presentation of the social and environmental reality of the industrial sector and the destination of the wastes, as well as it indicated the potentialities related to the energetic utilization of the industrial solid waste in the region. With the obtained results it was shown the importance of the the production and the destination of the industrial solid wastes in the Campinas metropolitan region , and the meaning, in terms of electric potency, of the values of the energy associated to the wastes with a known factor of energetic conversion shown in the researched sample. (author)

  2. Evaluation of the maximum energy achieved through generation of hydro and wind power in the Northeast subsystem; Avaliacao da maxima energia assegurada atraves de geracao hidro-eolica no subsistema do Nordeste

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Pedro T.; Teixeira, Marcos A.; Kissel, Johannes [Gesellschaft Fuer Technische Zusammenarbeit (GTZ) (Germany)

    2010-07-01

    In the current context to encourage sustainable development, wind energy plays an important role in the spread of renewable energy sources. In this paper, the possibilities and difficulties of wind power integration in large-scale are evaluated, specifically in the northeastern region of Brazil. From the seasonal complementarity with the water source, scenarios are set out where the maximum participation of only these two sources in the energy supply of the region is sought. Aiming to evaluate the possibilities of a completely sustainable regional energy supply, the northeast subsystem is isolated, excluding, in principle, imports and exports. Therefore, the energy storage capacity of reservoirs in the region is used as a key factor, combined with the seasonal availability of data sources and the annual energy consumption of the region. (author)

  3. Evaluation of occupational radiation dose in nuclear medicine: radiopharmaceutical administration to scintiscanning exams of myocardial perfusion; Avaliacao da dose de radiacao ocupacional em medicina nuclear: administracao de radiofarmacos em exames de cintilografria de perfusao miocardica

    Energy Technology Data Exchange (ETDEWEB)

    Komatsu, Cassio V., E-mail: cassiok@yahoo.com [Medicina Nuclear do Triangulo (MNT), Uberlandia, MG (Brazil); Michelin, Charlie A.; Jakubiak, Rosangela R., E-mail: charlie@utfpr.edu.br, E-mail: requi@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Lemes, Alyne O.; Silva, Juliana L.M., E-mail: alyne275@gmail.com, E-mail: jujumontesdocinho@gmail.com [Faculdade do Trabalho (FATRA), Uberlandia, MG (Brazil)

    2013-11-01

    In nuclear medicine, workers directly involved in exams are constantly exposed to ionizing radiation. The procedure for administration of the radiopharmaceutical to the patient is one of the most critical times of exposure. In tests of myocardial perfusion scintigraphy (MPS) administration of radiopharmaceutical repeats the steps of rest and cardiac stress. In this study, we used a Geiger -Mueller detector for measuring occupational radiation doses for during the administration of technetium- {sup 99m}- sestamibi in MPS tests. In the evaluation, discriminated the stages of examination and related professional experience time to doses measures at home. It were followed 110 procedures at home (55 conducted by professionals with over 5 years experience and 55 conducted by professionals with less than 1 year of experience) and 55 effort procedures. The results showed that the rest of the procedure time and dose are related to the experience of the worker. More experienced workers were faster (mean: 43 {+-} 16 vs 67 {+-} 25 seconds / procedure), and therefore received lower doses (mean 0.57 {+-} 0.16 versus 0.80 {+-} 0.24 {mu}Sv / procedure), both with statistical significance (p <0.001). In step effort, there were procedures lasting longer (mean: 19 {+-} 2 minutes / procedure), which resulted in higher doses (mean 3.0 {+-} 0.6 {mu}Sv / procedure)

  4. Safety analysis for the Abadia de Goias repository: alternative evaluation of the ingestion dose rate critical distance; Analise de seguranca para o repositorio de Abadia de Goias: avaliacao alternativa da distancia critica de taxa de dose de ingestao

    Energy Technology Data Exchange (ETDEWEB)

    Martin Alves, A.S. de; Passos, E.M. dos [NUCLEN, Rio de Janeiro, RJ (Brazil)

    1995-12-31

    An alternative calculation of the ingestion dose rate critical distance due to a hypothetical release of Cs-137 from the structure of the Repository of Abadia de Goias is presented. The release pathway considers the repository - groundwater region - well - and food chain. The main adopted modification comparing to the previous work is the inclusion of the convective and molecular diffusion terms in the radionuclide transport equation in addition to the radioactive decay term. (author). 6 refs, 1 tab.

  5. In vitro evaluation of ionizing radiation effects in bone tissue by FTIR spectroscopy and dynamic mechanical analysis; Avaliacao in vitro dos efeitos da radiacao ionizante em tecido osseo bovino por espectroscoia ATR-FTIR e analise dinamica-mecanica

    Energy Technology Data Exchange (ETDEWEB)

    Veloso, Marcelo Noronha

    2013-07-01

    Ionizing radiation from gamma radiation sources or X-ray generators is frequently used in Medical Science, such as radiodiagnostic exams, radiotherapy, and sterilization of haloenxerts. Ionizing radiation is capable of breaking polypeptidic chains and causing the release of free radicals by radiolysis.of water. It interacts also with organic material at the molecular level, and it may change its mechanical properties. In the specific case of bone tissue, studies report that ionizing radiation induces changes in collagen molecules and reduces the density of intermolecular crosslinks. The aim of this study was to verify the changes promoted by different doses of ionizing radiation in bone tissue using Fourier Transform Infrared Spectroscopy (FTIR) and dynamic mechanical analysis (DMA). Samples of bovine bone were irradiated using Cobalt-60 with five different doses: 0.01 kGy, 0.1 kGy, 1 kGy, 15 kGy and 75 kGy. To study the effects of ionizing irradiation on the chemical structure of the bone, the sub-bands of amide I, the crystallinity index and relation of organic and inorganic materials, were studied. The mechanical changes were evaluated using the elastic modulus and the damping value. To verify whether the chemical changes and the mechanical characteristics of the bone were correlated, the relation between the analysis made with spectroscopic data and the mechanical analysis data was studied. It was possible to evaluate the effects of different doses of ionizing radiation in bone tissue. With ATR-FTIR spectroscopy, it was possible to observe changes in the organic components and in the hydroxyapatite crystals organization. Changes were also observed in the elastic modulus and in the damping value. High correlation with statistical significance was observed among (amide III + collagen)/{sub v1,v3}, PO{sub 4}{sup 3-} and the delta tangent, and among 1/FHWM and the elastic modulus. (author)

  6. In vivo evaluation of Fe in the human skin and swins mice skin through the X-rays fluorescence technique; Avaliacao in vivo de Fe na pele humana e de camundongos swins atraves da tecnica de fluorescencia de raios X

    Energy Technology Data Exchange (ETDEWEB)

    Estevam, Marcelo

    2005-07-01

    Recent technological improvements allow the method of in vivo XRF to supply useful sensibility for diagnostics or monitoring in biomedical applications. In cases of hereditary sanguine disorders as the {beta}-Thalassaemia or a genetic disorder like Haemochromatosis, there is a high concentration of elements as Fe, Zn and Cu in the skin and internal organs, due to the treatment of those abnormalities or due to the own dysfunction caused by the disease. The levels of Fe related to the patient bearers of the {beta}-Thalassaemia are determined, at the moment, measuring a protein in the sanguine current, called ferritin. The monitoring of the protein is ineffective in several situations, such as when the patient suffers any disturbance of health. Nowadays, the main forms of measuring the levels of those metals through hepatic storage are the biopsy of the liver, that is invasive and potentially dangerous, presenting a rate of mortality of 0,1%, and through magnetic susceptibilities that employs a quantum superconductor, which is highly expensive and there are only three main world medical centers with this equipment. This work investigates the use of a Si PIN-diode detector and a 238Pu source (13 and 17 keV; 13%; 95.2 mCi; 86y) for the measurement of Fe skin levels compatible with those associated to the disease {beta}-Thalassaemia. XRF spectra were analyzed using a set of AXIL-WinQXAS programs elaborated and disseminated by the IAEA. The determination coefficient of the calibration model (sensitivity curve) was 0.97. Measurements on skin phantoms containing concentrations of Fe in the range from 15 to 150 parts per million (ppm), indicate that we are able to detect Fe at levels of the order of 13 ppm, using monitoring periods of 50 seconds and skin entrance dose less than 10 mSv. The literature reports skin Fe levels from 15.0 to 60.0 ppm in normal persons and from 70 to 150 ppm in thalassaemic patients. So, the employed methodology allows the in vivo measurement of the skin Fe concentration in wanted levels. (author)

  7. Evaluation of NORM concentration in water treatment of Pocos de Caldas municipality, MG, Brazil: preliminary results; Avaliacao da presenca de NORM no tratamento de agua do municipio de Pocos de Caldas: resultados preliminares

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Adriano Mota; Villegas, Raul A.S.; Fukuma, Henrique Takuji, E-mail: htfukuma@cnen.gov.br, E-mail: adrianomotaferreira@gmail.com [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

    2014-07-01

    NORM is the acronym used to refer to naturally occurring radioactive materials. Besides being objects of study and monitoring such materials can be used as raw material or as by-products or waste of industrial activities. Oil and gas, mining and water treatment are examples of facilities that can handle NORM. In such cases, their concentration at significant levels from the perspective of environmental and occupational radiation protection may occur. This study aims to evaluate the presence of the natural radioactive {sup 238}U and {sup 232}Th series in the treatment of city water elements Pocos de Caldas - MG (water, materials and waste). The study can serve as an indication of the necessity of a more detailed review in the locally and in the country on this radiological issue. (author)

  8. Market evaluation and investment planning in natural gas industry in Brazil: development of the net distribution pipeline; Avaliacao de mercado e planejamento de investimentos na industria de gas natural no Brasil: perspectivas de crescimento da malha de gasodutos de distribuicao

    Energy Technology Data Exchange (ETDEWEB)

    Avila, Pedro L.; Pamplona, Edson O. [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)

    2008-07-01

    This paper proposes to develop a real options model to decision-making investments in flexible technologies. As a result, finding a closed-form solution, derived from the partial differential equation of the value of flexibility provided by alternative fuels. However, you can present and analysis the results of a practical application using the method to solve real options problems known as binomial model. Initially presents a brief explanation on the method of discounted cash flow, its failures and changes to the real options analysis. In the sequence chart an overview of the natural gas industry on Brazil, emphasizing the need for consistent investments evaluations in the sector. The next section shows the proposed development of mathematical model for assessing the flexibility to choose, obtained by the exchange of fuel for transport of gas pipeline distribution of natural gas. The model takes as the case scenario where the flexible pipeline can carry both natural gas and hydrogen, and the evaluation of the option of exchanging input gives more value to the investment opportunity, and consider the optimum conditions where the option to be exercised. Keywords: Decision Making, Real Options; Natural Gas, Flexible Technology. (author)

  9. Synthesis and evaluation of antimicrobial activity of halogenated furans and analogue compounds to nostoclides; Sintese e avaliacao da atividade antimicrobiana de furanonas halogenadas e de compostos analogos aos nostoclideos

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Luiz C.A.; Maltha, Celia R.A.; Demuner, Antonio J.; Pinheiro, Patricia F.; Varejao, Jodieh O.S.; Montanari, Ricardo M., E-mail: lcab@ufv.b [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Quimica; Andrade, Nelio J. [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Ciencia e Tecnologia de Alimentos

    2010-07-01

    Considering the broad spectrum of biological activity of gamma-butyrolactone derivatives, we presented the synthesis of 3,4-dihalo-5-arylidenefuran-2(5H)-ones (17-21) and analogues (24-28) of the natural product nostoclide (7,8). Furanones 17-21 were synthesized from the condensation of aromatic aldehydes with lactones 14 and 15, that were obtained from mucobromic and mucochloric acids. Lactone 15 was converted into the intermediate 23 in 36% overall yield. Compound 23 was then transformed into the nostoclide analogues 24-28. Some of the compounds prepared showed antimicrobial activities against Escherichia coli, Staphylococcus aureus and Bacillus cereus comparable to commercial antibiotics. (author)

  10. Evaluation of gamma irradiation effects on carotenoids, ascorbic acid and sugar contents of buriti fruit (Mauritia flexuosa L.); Avaliacao dos efeitos da radiacao gama nos teores de carotenoides, acido ascorbico e acucares do fruto Buriti do Brejo (Mauritia flexuosa L.)

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Antonio Luis dos Santos [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil). Secao de Engenharia Quimica, Quimica Organica e de Produtos Naturais], e-mail: santoslima@ime.eb.br; Lima, Keila dos Santos Cople; Silva, Jaqueline Michele [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil). Secao de Engenharia Nuclear. Irradiacao de Alimentos], e-mail: keila@ime.eb.br, e-mail: jaquelinefisica@bol.com.br; Coelho, Maysa Joppert [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil). Secao de Engenharia Nuclear. Engenharia Ambiental], e-mail: maysa@ime.eb.br; Godoy, Ronoel Luiz de Oliveira [EMBRAPA Agroindustria de Alimentos, Rio de Janeiro, RJ (Brazil). Lab. de Cromatografia Liquida, Quimica Organica e de Produtos Naturais], e-mail: ronoel@ctaa.embrapa.br; Pacheco, Sidney [EMBRAPA Agroindustria de Alimentos, Rio de Janeiro, RJ (Brazil). Lab. de Cromatografia Liquida, Ciencia e Tecnologia de Alimentos], e-mail: sidney@ctaa.embrapa.br

    2009-07-01

    Buriti (Mauritia flexuosa L.), a typical fruit from the Northeast and Center-West Amazon of Brazil, is used in many regional dishes. It is considered an excellent source of carotenoids that are A vitamin precursors, showing a majority of beta-carotene. It also presents ascorbic acid and sugar contents. Many studies have indicated that the lack of A vitamin is the main cause of night blindness and xerophthalmia. Also, ascorbic acid deficiency may cause scorbutic disease. The use of food irradiation is growing and represents an economic benefit to agriculture through the reduction of post-harvesting losses while maintaining food nutritional quality. In this study, buriti in natura was treated with gamma irradiation with doses of 0.5 kGy and 1.0 kGy. The objective was to evaluate the irradiation effects on total carotenoids, ascorbic acid and sugars concentrations of buriti. The fruit was evaluated through the total carotenoids analysis, by spectrophotometry, and the carotenoids (alpha and beta-carotene and lutein), ascorbic acid and sugars were determined by high performance liquid chromatography (HPLC). The results showed that buriti is an excellent source of total carotenoids (44600 {mu}g/100 g). The irradiation of buriti with the dose of 0.5 kGy did not significantly change carotenoids and sugars contents. However, there was a reduction of ascorbic acid concentration with an increase of the dose, which may have been caused by irradiation or by intrinsic and extrinsic factors that alter ascorbic acid stability in food, converting ascorbic to dehydroascorbic acid, while keeping the C vitamin active form. (author)

  11. Evaluation of the effects of gamma radiation on physicochemical characteristics of kiwi (Actinidia deliciosa) cv. Hayward minimally processed; Avaliacao dos efeitos da radiacao gama nas caracteristicas fisico-quimicas de kiwi (Actinidia deliciosa) cv. Hayward minimamente processado

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Ana Claudia Sampaio

    2011-07-01

    The search for a healthy life has led consumers to rethink their eating habits, consuming fruits and vegetables in place of manufactured products, therefore, the demand for minimally processed products has evolved rapidly. The kiwi fruit (Actinidia deliciosa) has high nutritional value, being rich in C vitamin especially, which has wide acceptance in consumer markets. Thus, along with papaya, passion fruit and pineapple, kiwi can be considered as an additional feature of C vitamin in the diet, or as a substitute for traditional citrus. The aim of this study was to assess the effects of gamma radiation on physical and chemical characteristics of kiwis minimally processed and stored under refrigeration, since this technology increases the shelf life of fruits and vegetables. The Kiwis was stripped, processed and cut into slices, stored in polyethylene bags of 10 cm squared and irradiated at doses of 0 (control), 1 and 2 kGy. A source of {sup 60}Co Gammacell 220, dose rate of 0.429 kGy/hour, in which each treatment had 5 replicates with 15 slices of kiwifruit per replicate. After irradiation the samples were stored in a climatic chamber at 6 degree C (near the temperature of commercial refrigerators). The following criteria were physical chemical analysis: pH, color, chlorophyll content, loss of weight, moisture, acidity and Brix. The analysis were done on 1{sup st}, 7{sup th} and 14{sup th} days after irradiation. The results indicated that gamma radiation did not induce deleterious changes in the physicochemical properties of the kiwi may be used for preservation of minimally processed kiwifruit. (author)

  12. Evaluation of the use of waste of soybeans (Glycine max (L.)) combined with wood waste in making briquet; Avaliacao da utilizacao de residuo de soja (Glycine max (L.)) combinado com residuo de madeira de confeccao de briquetes

    Energy Technology Data Exchange (ETDEWEB)

    Travessini, Rosana; Schutz, Fabiana Costa de Araujo; Anami, Marcelo Hidemassa; Scherpinski, Neusa Idick [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil)], Emails: rosana_travessini@yahoo.com.br, fabianaschutz@gmail.com, mhanami@gmail.com, neusascherpinski@gmail.com

    2010-07-01

    The agricultural industry produces a large amount of which use biomass is an alternative energy economically viable through the compression portion of ligno-cellulose as raw material to replace the wood with an equivalent product, by briquetting. This study aimed to evaluate the technical feasibility of manufacturing fuel briquettes made from soybean residues combined with waste wood. The making of briquettes was performed in the laboratory of Electromechanics of UTFPR campus Medianeira PR. For this analysis, we assessed the content of moisture, ash, fixed carbon content of porosity and higher calorific value. From the results we can conclude that the manufacture of briquettes from lignocellulosic raw materials is an extremely viable energy flashlight for the region of the Bacia do Rio Parana III. (author)

  13. Development of methodology for evaluation of {sup 99m}Tc and {sup 131}I incorporated activities during lactation; Desenvolvimento de metodologia para avaliacao da atividade de {sup 99m}Tc e {sup 131}I em lactantes

    Energy Technology Data Exchange (ETDEWEB)

    Santos, L. [Universidade Federal do Rio de Janeiro (IF/UFRJ), RJ (Brazil). Inst. de Fisica; Dantas, A.L.A.; Mesquita, S.A. [Universidade Federal do Rio de Janeiro (IF/UFRJ), RJ (Brazil). Inst. de Fisica; Oliveira, S.M.V., E-mail: adantas@ird.gov.br, E-mail: silvia@ird.gov.br [Universidade Federal do Rio de Janeiro (IF/UFRJ), RJ (Brazil). Inst. de Fisica; Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Div. de Dosimetria

    2012-07-01

    Internal contamination of babies may occur for milk ingestion or inhalation of mothers occupationally exposed to ionizing radiation with possible incorporation or mothers submitted to medical exposures during lactation. Radionuclide concentrations in the mother's milk may cause organ absorbed doses in the babies proportionally to the breast volumes. Milk analysis allow to determine activities ingested by the babies by determining the peak of mother's milk considering the decrease of the activity rate and the milk activities drunk at different time intervals. The work had the aim to develop simulators and methodology to evaluate {sup 99m}Tc and {sup 131}I in lactation, in the following steps: to prepare standard solution of contaminated milk separately with {sup 99m}Tc and {sup 131}I; to build four breast simulators (600 g and 800 g) and respective calibration for two geometries (breast and whole-body) in the Whole-Body Counter Unit in Instituto de Radioprotecao e Dosimetria. The results demonstrated the system efficiency to determine {sup 99m}Tc and {sup 131}I activities in breasts during the lactation period. The methodology for positioning in the 'breast geometry' seemed to be more efficient than the 'whole-body geometry' for different breast volumes. The experiment allows achieving better evaluation of internal dosimetry of mothers and their young children. (author)

  14. Evaluation of ensemble atmospheric simulations in oil dispersion models at Itaguai Port region; Avaliacao do uso de resultados numericos de previsao atmosferica por conjunto na modelagem da dispersao de oleo na regiao do Porto de Itaguai

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Renato Goncalves dos; Silva, Mariana P.R.; Silva, Ricardo Marcelo da; Torres Junior, Audalio R. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Lab. de Modelagem de Processos Marinhos e Atmosfericos (LAMMA); Landau, Luiz [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Lab. de Metodos Computacinais em Engenharia (LAMCE); Sa, Reginaldo Ventura de; Hochleitner, Fabio; Correa, Eduardo Barbosa [AQUAMET Meteorologia e Projeto de Sistemas, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This work discusses the use of numerical prediction using ensemble as boundary condition in pollutants dispersion models, applied in a hypothetical case of an oil spill occurrence in Itaguai Port. The Princeton Ocean Model (POM) has been used to simulate hydrodynamics and NICOIL Eulerian model to forecast oil spill dispersion, and ensemble wind forecast from Global Forecast System (GFS), aiming to assess the importance of this parameter variability in oil dispersion at sea. The wind scenarios using ensemble members has showed significant dispersion when compared to control simulation, demonstrating that the uncertainty in the atmospheric modeling can generate considerable variations in the placement of the final spot of oil. The region of interest was the Sepetiba Bay, located on the southern coast of the Rio de Janeiro state; because of port operations carried out around the Port of Itaguai where they can, eventually, oil leaks occur. (author)

  15. Evaluating factorial kriging for seismic attributes filtering: a geostatistical filter applied to reservoir characterization; Avaliacao da krigagem fatorial na filtragem de atributos sismicos: um filtro geoestatistico aplicado a caracterizacao de reservatorios

    Energy Technology Data Exchange (ETDEWEB)

    Mundim, Evaldo Cesario

    1999-02-01

    In this dissertation the Factorial Kriging analysis for the filtering of seismic attributes applied to reservoir characterization is considered. Factorial Kriging works in the spatial, domain in a similar way to the Spectral Analysis in the frequency domain. The incorporation of filtered attributes via External Drift Kriging and Collocated Cokriging in the estimate of reservoir characterization is discussed. Its relevance for the reservoir porous volume calculation is also evaluated based on comparative analysis of the volume risk curves derived from stochastic conditional simulations with collocated variable and stochastic conditional simulations with collocated variable and stochastic conditional simulations with external drift. results prove Factorial Kriging as an efficient technique for the filtering of seismic attributes images, of which geologic features are enhanced. The attribute filtering improves the correlation between the attributes and the well data and the estimates of the reservoir properties. The differences between the estimates obtained by External Drift Kriging and Collocated Cokriging are also reduced. (author)

  16. Evaluation of the potential of additives as corrosion inhibitors of CA-50 carbon steel used as reinforcement in concretes; Avaliacao da potencialidade de aditivos como inibidores de corrosao do aco carbono CA-50 usado como armadura de estruturas de concreto

    Energy Technology Data Exchange (ETDEWEB)

    Mennucci, Marina Martins

    2006-07-01

    In this work, various compounds were tested to evaluate their potential capability for their use as corrosion inhibitors of carbon steel reinforcement in concretes. The additives tested were sodium benzoate, polyethylene glycol, hexamethylenetetramine, benzotriazole and yttrium carbonate. Initially, exploratory tests were carried out to select the ones to be used as corrosion inhibitors, based on the inhibit ion efficiency determined from electrochemical tests, specifically polarization tests and electrochemical impedance spectroscopy. These tests were carried out in a solution composed of 0.01 N sodium hydroxide (NaOH) and 0.05 N potassium hydroxide (KOH) to simulate the composition of the solution inside the pores in concretes. The additive that presented the most promising potential to be used as corrosion inhibitor was benzotriazole (BTA). After the elimination of some compounds and selection of the additive with higher corrosion inhibit ion efficiency in the test medium, the effect of its concentration on the corrosion inhibition efficiency was evaluated. Sodium nitrite solutions with the same concentrations as those solutions with BTA were tested for comparison reasons. Sodium nitrite is a well established corrosion inhibitor for carbon steel reinforcement in concretes but it has been related to toxic effects. The BTA was associated to higher corrosion inhibition efficiencies than that of sodium nitrite in similar concentrations. A blackish adherent film was formed on the steel surface exposed to BTA solutions during long periods of immersion in the alkaline medium. The results suggest that BTA is a potential candidate for substitution of nitrites as corrosion inhibitor of reinforcements in concrete. (author)

  17. Determination of absorbed dose in water: evaluation of dosimetric factors calibration sets used in radiotherapy; Determinacao da dose absorvida na agua: avaliacao dos fatores de calibracao de conjuntos dosimetricos de uso em radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Marco A.R. [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Faculdade de Medicina. Departamento de Dermatologia e Radioterapia; Fontana, Julia M.; Santos, Vitor H.P.; Nunes, Isabella P.F.; Okawabata, Francine S., E-mail: marfernandes@fmb.unesp.br [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Instituto de Biociencia

    2014-12-15

    This paper presents a methodology for measuring the dose rate (cGy/min) in a telecobaltotherapy beam, looking emphasize the need for calibration of dosimetric set used and the importance of conducting periodic clinical megavoltage dosimetry of these beams. Two dosimetric set with their respective calibration factors were used. The correction parameters indicated in dosimetry protocols were determined by ionization chambers used. The difference between the value of the dose rate used in the calculation of the service routine and the values obtained in this work with both dosimetric sets proved to be less than 1.5%, and therefore satisfies the maximum recommended tolerance on quality control protocols for this type of therapeutic beam. (author)

  18. Assessment of PWR fuel degradation by post-irradiation examinations and modeling in DEGRAD-1 code; Avaliacao da degradacao de combustivel PWR por exames pos-irradiacao e modelagem no codigo DEGRAD-1

    Energy Technology Data Exchange (ETDEWEB)

    Castanheira, Myrthes; Lucki, Georgi; Silva, Jose Eduardo Rosa da; Terremoto, Luis A.A.; Silva, Antonio Teixeira e; Teodoro, Celso A.; Damy, Margaret de A. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Centro de Engenharia Nuclear]. E-mail: myrthes@ipen

    2005-07-01

    On the majority of the cases, the inquiries on primary failures and secondary in PWR fuel rods are based on results of analysis were made use of the non-destructive examination results (coolant activities monitoring, sipping tests, visual examination). The complementary analysis methodology proposed in this work includes a modeling approach to characterization of the physical effects of the individual chemistry mechanisms that constitute the incubation phase of degradation phenomenon after primary failure that are integrated in the reactor operational history under stationary operational regime, and normal power transients. The computational program called DEGRAD-1 was developed based on this modeling approach. The practical outcome of the program is to predict cladding regions susceptible to massive hydriding. The applications presented demonstrate the validity of proposed method and models by actual cases simulation, which (primary and secondary) defects positions were known and formation time was estimated. By using the modeling approach, a relationship between the hydrogen concentration in the gap and the inner cladding oxide thickness has been identified which, when satisfied, will induce massive hydriding. The novelty in this work is the integrated methodology, which supplements the traditional analysis methods (using data from non-destructive techniques) with mathematical models for the hydrogen evolution, oxidation and hydriding that include refined approaches and criteria for PWR fuel, and using the FRAPCON-3 fuel performance code as the basic tool. (author)

  19. Gamma radiation (Co{sup 60}) effects on active substances and microbe burden of medicinal plants; Avaliacao dos efeitos da radiacao gama (Co{sup 60}) sobre principios ativos e carga microbiana de plantas medicinais

    Energy Technology Data Exchange (ETDEWEB)

    Dall' Agnol, L. [Herbarium Laboratorio Botanico Ltda, Colombo, PR (Brazil). Dept. de Garantia da Qualidade

    2001-04-01

    In order to evaluate the effects of radioactivity on active vegetal substances, samples of Fennel (Foeniculum vulgare Miller., fructus), Guarana (Paulinia cupana, Kunth, semen), Gingko (gingko biloba, L., folium), and Kawa-Kawa (Piper methysticum G. Forst, rhizoma), were treated with scaling doses (0 to 25 KGy) of gamma radiation (Co{sup 60}). The 'blind test' methodology was used. The active substances from each sample were analysed by qualitative and quantitative methods after radiation. There were no significant differences seen between the control sample (0 KGy) and the irradiated samples. Microbe contamination was significantly reduced, about 10000 CFU/g, with the initial 5 KGy dose. It was concluded that gamma radiation can be used as an alternative procedure to reduce microbiologic contamination in medicinal plants. Before this procedure can be extended to other medicinal plants, more specific analytical methods are recommended to verify possible structural alterations in active vegetal molecules. (author)

  20. Assessment of occupational radiation protection conditions during power enhancement of the Angra-2 nuclear power plant; Avaliacao das condicoes de radioprotecao ocupacional durante a elevacao de potencia na Unidade 2 da Central Nuclear Almirante Alvaro Alberto - Angra-2

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Eduardo M.; Rocha, Antonio Carlos S.; Ferreira, Paulo R.R.; Mouco, Charles Dickens C.L.; Godoy, Jose M.O.; Matta, Luiz E.S.C. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)

    2001-07-01

    This paper intend to analyse the occupational radioprotection conditions of the Angra-2 nuclear power plant, from the startup up to reach 100% of the nominal power. To perform this work a group of dose rates measures was made including beta/gamma and neutron radiation, particulates and iodine monitoring, and surface contamination, during the whole process. These measures were made inside of the three main buildings: the reactor buildings (UJA - reactor core and UJB) and the Reactor Auxiliary Building (UKA). (author)

  1. Evaluation of {sup 222}Rn concentration of the internal and external environments of residences at Monte Alegre municipality, Para, Brazil; Avaliacao da concentracao do {sup 222}Rn nos ambientes internos e externos de residencias do municipio de Monte Alegre, PA

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Vicente de Paula

    1999-07-01

    The human being is constantly exposed to the natural radioactivity in the environment where he lives. This radioactivity comes mainly from materials present in the terrestrial crust that possess in their constitution chemical elements belonging to the radioactive families of uranium and thorium. The use of such materials for the construction of houses constitutes an important exposure form to the natural radiation, above all to the radioactive gas {sup 222}Rn, that it is exhaled from them. The Brazilian soil is composed, among other, of minerals that contain appreciable concentrations of these elements. The inhabitants of Monte Alegre town in Para, located at 2 deg 00' 24,9 'S ; 54 deg 04 ' 13,5 {sup W}, used in the construction of their houses stones obtained from an area 20 km distant of Monte Alegre, denominated Ingles de Souza, located at 01 deg 56' 4 0,1 S; 54 deg 12 149,7 W, where a small residential village, denominated National Agricultural Colony of Para (CANP), is located. The objective of this work was to evaluate the indoor concentration of {sup 222}Rn in the residences of Monte Alegre and CANP. Determinations of the {sup 238}U and {sup 226}Ra concentrations, measurements of the radon flux in samples of stones and soils of the two regions, as well as measurements to the gamma dose close of the soil and inside the residences, were also carried out. The average results of the radon concentration in the air of the investigated residences did not exceed the limits of 200 Bq. m{sup 3} (action level) and 600 Bq. m{sup 3} (intervention level) recommended by the International Commission on Radiological Protection (ICRP). The concentrations of natural radionuclides and the radon flux determined at the village showed values 17 times higher than those found at the urban area of Monte Alegre, while the average indoor gamma dose rate in the village residences was 0.86 mSv/a. (author)

  2. Evaluation of the potential of waste processing of secondary kaolin of Para for use in porcelain; Avaliacao da potencialidade do residuo do beneficiamento secundario de caulim do Para para utilizacao em porcelanato

    Energy Technology Data Exchange (ETDEWEB)

    Junior, V.G.L.; Fernandes, L.L.; Fagury Neto, E.; Rabelo, A.A., E-mail: adrianoalves@ufpa.br [Universidade Federal do Para (UFPA), Maraba, PA (Brazil). Faculdade de Engenharia de Materiais. Lab. de Materiais Ceramicos

    2012-07-01

    The kaolin waste evaluated is characterized as secondary due be coming from the steps of centrifugation, magnetic separation, bleaching and filtering, which gives a ratio which provides a significant residue, about 26% of their gross, that is intended for embankments. This study aimed to evaluate the potential of reusing the kaolin waste processing from Imerys RCC in the region of Barcarena (PA) in formulation of ceramic bodies for porcelain tiles production, seeking to property of maximum water absorption of 0.5 % for this type of product. The residue from the production of kaolin had been previously characterized by X-ray diffraction and there is a significant amount of kaolinite concentration. After the ceramic processing to obtain the test specimens with different amounts of residue replacing the kaolin, these were sintered using 1200, 1220 and 1240 °C for 2 hours. The formulations were evaluated by water absorption, linear firing shrinkage and modulus of rupture at a three-point bending setup of the pieces produced. (author)

  3. Evaluation of area monitor response for neutrons in radiation field generated by a 15 MV clinic accelerator; Avaliacao da resposta dos monitores de area para neutrons em campo de radiacao gerado por um acelerador clinico de 15 MV

    Energy Technology Data Exchange (ETDEWEB)

    Salgado, Ana Paula

    2011-07-01

    The clinical importance and usage of linear accelerators in cancer treatment increased significantly in the last years. Coupled with this growth came the concern about the use of accelerators with energies over to 10 MeV which produce therapeutic beam contaminated with neutrons generated when high-energy photons interact with high-atomic-number materials such as tungsten and lead present in the accelerator itself. At these facilities, measurements of the ambient dose equivalent for neutrons present difficulties owing to the existence of a mixed radiation field and possible electromagnetic interference near the accelerator. The Neutron Laboratory of the IRD - Brazilian Institute for Radioprotection and Dosimetry, aiming to evaluate the survey meters performance at these facilities, initiated studies of instrumentation response in the presence of different neutron spectra. Neutrons sources with average energies ranging from 0.55 to 4.2 MeV, four different survey meters and one ionization chamber to obtain the ratio between the dose due to neutrons and gamma radiation were used in this work. The evaluation of these measurements, performed in a 15 MV linear accelerator room is presented. This work presents results that demonstrate the complexity and care needed to make neutrons measurements in radiotherapy treatment rooms containing high energy clinical accelerators. (author)

  4. Labeling of thymidine analog with an organometallic complex of technetium-99m for diagnostic of cancer: radiochemical and biological evaluation; Marcacao de analogo da timidina com complexo organometalico de tecnecio-99m para diagnostico de cancer: avaliacao radioquimica e biologica

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Rodrigo Luis Silva Ribeiro

    2007-07-01

    Thymidine analogs have been labeled with different radioisotopes due to their potential in monitoring the uncontrollable cell proliferation. Considering that the radioisotopes technetium-99m still keep a privileged position as a marker due to its chemical and nuclear properties, this dissertation was constituted by the developed of a new technique of labeling of thymidine analog with {sup 99m}Tc, by means of the organometallic complex. The aims of this research were: synthesis of the organometallic complex technetium-99m-carbonyl, thymidine labeling with this precursor, evaluation of stability, and radiochemical e biological evaluation with healthy and tumor-bearing animals. The preparation of the organometallic precursor, using the CO gas, was easily achieved, as well as the labeling of thymidine with this precursor, resulting itself a radiochemical pureness of {>=} 97% and {>=} 94%, respectively. Chromatography systems with good levels of trustworthiness were used, ensuring the qualification and quantification of the radiochemical samples. The result of in vitro testing of lipophilicity disclosed that the radiolabeled complex is hydrophilic, with a partition coefficient (log P) of -1.48. The precursor complex and the radiolabeled have good radiochemical stability up to 6 h in room temperature. The cysteine and histidine challenge indicated losses between 8 and 1 1 % for concentrations until 300 mM. The biodistribution assay in healthy mice revealed rapid blood clearance and low uptake by general organs with renal and hepatobiliary excretion. The tumor concentration was low with values of 0.28 and 0.18 %ID/g for lung and breast cancer, respectively. The results imply more studies in other tumor models or the modification of the structure of the organic molecule that act like ligand. (author)

  5. Evaluation of red mud as pozzolanic material in replacement of cement for production of mortars; Avaliacao da lama vermelha como material pozolanico em substituicao ao cimento para producao de argamassas

    Energy Technology Data Exchange (ETDEWEB)

    Manfroi, E.P.; Cheriaf, M.; Rocha, J.C., E-mail: elizmanfroi@yahoo.com.b, E-mail: malik@valores.ufsc.b [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Engenharia Civil

    2010-07-01

    Red mud is a by-product of the alkaline extraction of aluminum from the bauxite and represents a renewed environmental problem due the significant annual throughput by the plants. In the present work, the pozzolanic properties of Brazilian red mud fired at 600, 700, 800 and 900 deg C were investigated by monitoring lime consumption using DTA analysis and Brazilian standard methodology NBR 5772 (1992). Products and kinetics of hydration were determined in cement pastes produced with 5 and 15% red mud using x-ray diffraction and DTA analysis. Compressive strength and capillary absorption tests were realized on mortars constituted by 5, 10 and 15% red mud in replacement of cement. When calcined at 600 deg C, the red mud develops good pozzolanic properties, and the compressive strength of mortars produced with this waste meet values in accordance with regulatory standard. These results shown than red mud can be used, in partial replacement of cement, as new construction material to produce sustainable mortars with low environmental impact. (author)

  6. Preparation of modified clay with benzethonium or cetylpyridinium chloride and evaluation of their interactions with PVC;Preparacao de argilas modificadas com cloreto de benzetonio ou cetilpiridineo e avaliacao da interacao destas com o PVC

    Energy Technology Data Exchange (ETDEWEB)

    Resende, Daniel K.; Dornelas, Camila B.; Moreira, Leonardo A.; Gomes, Ailton S.; Tavares, Maria I.B., E-mail: dkresende@ima.ufrj.b [Universidade Federal do Rio de Janeiro (IMA/UFRJ), RJ (Brazil). Inst. de Macromoleculas Profa. Eloisa Mano; Cabral, Lucio M. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Lab. de Tecnologia Industrial Farmaceutica; Simeoni, Luiz A. [Universidade de Brasilia (UnB), DF (Brazil). Lab. de Farmacologia Molecular

    2009-07-01

    The objective of this work was the preparation of modified clays with benzethonium or cetylpyridinium to obtain organophilic silicates with good stability and evaluate the possible use of them for the preparation of nanocomposites of poly(vinyl chloride) (PVC). The reactions of modification of clays and the PVC were prepared by solution intercalation. The new clays were evaluated by X-ray diffraction (XRD) and Low field nuclear magnetic resonance (NMR). The reactions of clays with PVC were assessed by Low-field NMR, through the determination of proton spin lattice relaxation time. The stability of new organophilic clays and their reactions with PVC were evaluated by thermogravimetric analysis (TGA). High stability was observed for organophilic clays prepared. The degradation of PVC materials obtained with the organophilic clay began at temperatures above 200 deg C. If it is considered that the temperatures normally used in the processing of PVC are between 140 deg C to 180 deg C, the observed results may indicate the possibility of the use of clays for preparation of nanomaterials with PVC. (author)

  7. Niobium (V) doped bioceramics: evaluation of the hydrothermal route modified with citric acid and urea to obtain modified hydroxyapatite; Bioceramicas aditivadas com niobio (V): avaliacao da rota hidrotermica modificada com acido citrico e ureia para obtencao de hidroxiapatitas modificadas

    Energy Technology Data Exchange (ETDEWEB)

    Simomukay, E.; Souza, E.C.F. de; Antunes, S.R.M.; Borges, C.P.F.; Michel, M.D.; Antunes, A.C. [Universidade Estadual de Ponta Grossa (UEPG), Ponta Grossa, PR (Brazil)

    2016-01-15

    Synthetic hydroxyapatite (Ca{sub 10}(PO{sub 4}){sub 6}(OH){sub 2}; HA) has become a widely used ceramic material for bone reconstruction due to its biocompatibility with the bone tissue. This biocompatibility as well as other physical and chemical properties of the hydroxyapatite can be modified by the addition of different ions to its structure. Niobium (V) ion has not been commonly used in the hydroxyapatite synthesis. The objective of this study was to evaluate the use of hydrothermal route in the niobium (V) doped hydroxyapatite synthesis. The route used the niobium ammonium oxalate (NH{sub 4}H{sub 2}[NbO(C{sub 2}O{sub 4}){sub 3}].3H{sub 2}O) complex as a niobium (V) ion precursor. The addition of citric acid and urea in the hydrothermal route is used for the control of synthesis pH and precipitation rate. Pure sample and sample added with 5.3 ppm of niobium (V) ion were prepared. The coexistence of other phases besides the hydroxyapatite was not observed in any of the samples through the use of X-ray diffraction and infrared spectroscopy (FTIR) techniques. The FTIR technique revealed the presence of hydroxyapatite characteristic functional groups. The scanning electron microscopy analysis showed the formation of agglomerates composed of round particles, confirmed by the transmission electron microscopy technique. The X-ray fluorescence spectroscopic analysis detected the presence of niobium in the doped sample. The results showed that niobium (V) doped hydroxyapatite can be synthesized by means of hydrothermal route, which may be considered as huge potential for future application in bioceramics. (author)

  8. 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)

  9. Assessment of the bacteria reduction in the infected root canal irradiated with diode laser; Avaliacao da reducao bacteriana em conduto radicular infectado e irradiado com laser de diodo. Estudo in vitro

    Energy Technology Data Exchange (ETDEWEB)

    Radaelli, Claudia Amaral Rabello de Mello

    2002-07-01

    High success rates are achieved in conventional endodontic treatment of vital pulp teeth. However, in cases of non-vital pulp, a decrease in the rate of success occurs due to difficulties in achieving a complete disinfection of the root canals system. Some bacteria, such as Enterococcus faecalis, are frequently found in cases of endodontic treatment failure due to their high resistance to the conventional endodontic treatment. The aim of this study was to evaluate the efficiency of a high power diode laser irradiation in bacterial reduction of contaminated canals associated with dressing compose by calcium hydroxide paste propylene glycol and camphorated paramonochlorophenol. Eighty-two root canals were infected in vitro with Enterococcus faecalis in a concentration of 1x10{sup 8} CFU/ml. Specimens were high intensity irradiated with a diode laser model Opus 10, at a wavelength of 830 nm. Two different parameters were employed in continuous mode: 3 W and 2,5 W with a 360 {mu}m optical fiber at an angle of approximately 5 degrees respect to the dentine surface during 5 seconds, in 4 applications, with 20 seconds intervals among them. After these proceedings specimens were vortexed in peptone water and dilutions performed. Aliquots of the dilution were plated on m-Enterococcus agar, incubated, and the Colonies Forming Units (CFU) of ali groups was counted. The results showed a significant reduction of bacteria on ali groups after laser irradiation. A high reduction rate was achieved: 98.5% immediately after the laser irradiation; 48 hours after, the reduction was of 96,73% and, finally, a 100% reduction was achieved through the combination of laser irradiation and a long lasting dressing of calcium hydroxide paste, propylene glycol and camphorated paramonochlorophenol. High rates of bacteria reduction were achieved using the parameter of 3 W in continuous mode with the power of 2,9473 KW/cm{sup 2}. The temperature was monitored with a K-pipe thermocouple placed at the periapical point which width measured 1 mm, approximately. The maximum temperature variation was 7.45 deg C. Under electron microscope scanning, the control groups showed areas with smear layer covering the dentinal walls. The laser irradiated groups showed a smooth, uniform, clean appearance, with small areas of closed dentinal tubules without cracking alternately with areas of exposed open dentinal tubules. Some parts showed fusion of the dentinal mass (groups irradiated with 3 W). In groups where calcium hydroxide was associated with laser irradiation remains were found over the irradiated surface and, in many parts, the dentinal tubules could not be observed. The use of high intensity diode laser at 830 nm proved to be efficient and able to promote reduction in the Enterococcus faecalis population in the infected root canals. (author)

  10. Apical microinfiltration evaluation of radicular channels irradiated with Er:YAG laser in vitro; Avaliacao da microinfiltracao apical de condutos radiculares irradiados in vitro com laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Sebrao, Catia Cilene Nass

    2003-07-01

    It was evaluated, in vitro, the adaptation of the filling material (Sealer 2S{sup R}) to the root channels dentine walls treated using the endodontic technique and prepared with the Er:YAG laser, by the technique of infiltration of methylene blue dye. Using scanning electronic microscopy, the morphologic alteration of the root channel dentine was observed for one sample per studied group. Also, an evaluation of the temperature increase in the external surface of the root during the irradiations was performed for two samples per group. For each group of samples, with eleven roots each, two sub-groups had been considered: the dry, irradiated after completely dry with absorbent cones of paper, and the humid, where a cone of absorbent paper was applied for two seconds in the root canal, leaving them lightly humidified. Considering the used energies for the irradiations, the groups are: G1, control (without irradiation), G2-dry (100 mJ-10 Hz), G2-humid (100 mJ-10 Hz), G3-dry (140 mJ-6 Hz), G3-humid (140 mJ-6 Hz), G4-dry (180 mJ-6 Hz), and G4-humid (180 mJ-6 Hz). The results had shown that apical microinfiltration did not exhibit significant difference among groups. The highest increase in temperature was observed for the dry groups, with the maximum variation of temperature of 6.5 deg C. Under the scanning electronic microscopy analysis, the humid groups had presented cleaner surfaces than the dry groups. The G4-humid group presented extensive regions of fusion and resolidification of the dentine. (author)

  11. Application of support vector machines in the evaluation of reliability generation and transmission systems; Aplicacao de maquinas de vetores suporte na avaliacao da confiabilidade de sistemas de geracao e transmissao

    Energy Technology Data Exchange (ETDEWEB)

    Dutra, Wellington Damascena; Resende, Leonidas Chaves de [Universidade Federal de Sao Joao Del-Rei (UFSJ), MG (Brazil); Manso, Luiz Antonio da Fonseca; Silva, Armando Martins Leite da [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)

    2010-07-01

    This paper presents a methodology for assessing the reliability indices for composite generation and transmission systems based on Support Vector Machines (SVM). The importance of SVMs is its high generalization ability. The SVMs are used to classify data into two distinct classes. These can be named positive and negative. Thus, the basic idea is to classify the system states into success or failure. For this, a pre-classification of states is achieved by performing the proposed SVM-based neural network, where the sampled states during the beginning of the non-sequential Monte Carlo simulation (MCS) are considered as input data for training and validation sets. By adopting this procedure, a large number of states are classified by a simple evaluation of the network, providing significant reductions in computational costs. The proposed methodology is applied to the IEEE Reliability Test System and to the IEEE Modified Reliability Test System. (author)

  12. Evaluation of the price volatility of short-term in Brazil and its relation with the thermal generation; Avaliacao da volatilidade do preco de curto prazo no Brasil e sua relacao com a geracao termica

    Energy Technology Data Exchange (ETDEWEB)

    Heideier, R.B.; Prado, F.A.A.; Saidel, M.A.; Ueocka, M.Z. [Universidade de Sao Paulo (EPUSP), SP (Brazil). Escola Politecnica. Dept. de Energia e Automacao Eletricas], E-mails: fernando@sinerconsult.com.br, saidel@pea.usp.br, marcos.ueocka@poli.usp.br

    2009-07-01

    This article evaluate the intensity of volatility of the electric power prices in the short term market in selected countries. It were analyzed historical series of monthly prices of major energy markets worldwide, with assessment of the energy matrix of each region. The study, by analysis of data entry program for optimizing the operation of the SIN (NEWAVE and DECOM), concludes that the price volatility in short-term in Brazil is marked by the large variation of thermal power available, especially the lack of natural gas.

  13. Evaluation of radioiodine therapy with fixed doses of 10 and 15 mCi in patients with Graves disease; Avaliacao da radioiodoterapia com doses fixas de 10 e 15 mCi em pacientes com doenca de Graves

    Energy Technology Data Exchange (ETDEWEB)

    Canadas, Viviane; Vilar, Lucio; Moura, Eliane; Brito, Ana; Castellar, Enio [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Hospital das Clinicas. Servico de Endocrinologia]. E-mail: vivi2207@ig.com.br

    2007-10-15

    The treatment options for the hyperthyroidism of Graves' disease are antithyroid drugs, surgery and radioiodine, none of which is considered ideal, as they do not act directly on the etiopathogenesis of the disease. Radioiodine has been increasingly used as the treatment of choice because it is a safe and definitive therapy whose administration is very easy. Some authors prefer to administer higher doses in order to deliberately induce hypothyroidism, while others recommend lower doses that result in a lower incidence of hypothyroidism and a greater incidence of euthyroidism. There is no consensus for the optimal regimen of fixed doses to be used and this is the main focus of the present study, where doses of 10 and 15 mCi of {sup 131}I were compared. Among the 164 patients analyzed, 61 (37.2%) were submitted to 10 mCi and 103 (62.8%) to 15 mCi. In the longitudinal analysis it was observed that remission of the hyperthyroidism was statistically different in the sixth month (p < 0.001), being higher in the group that used the dose of 15 mCi, but similar in both groups at 12 and 24 months. It may be concluded that the administration of fixed doses of 10 and 15 mCi of {sup 131}I brought about a similar remission of the hyperthyroidism after 12 months of treatment. Moreover, the remission rate of the hyperthyroidism had no association with age, sex or previous therapy with antithyroid drugs. (author)

  14. Impregnation of 12-tungstophosphoric acid on silica - part I: determination of impregnation parameters, characterization and evaluation of catalytic activity; Impregnacao do acido 12-fosfotungstico em silica - parte I: determinacao de parametros de impregnacao, caracterizacao e avaliacao da atividade catalitica

    Energy Technology Data Exchange (ETDEWEB)

    Scroccaro, Karine Isabel; Tanobe, Valcineide Oliveira de Andrade; Cocco, Lilian Cristina; Yamamoto, Carlos Itsuo, E-mail: karineisabel@yahoo.com.br [Universidade Federal do Parana, Curitiba, PR (Brazil). Centro Politecnico. Dept. de Engenharia Quimica; Wypych, Fernando [Universidade Federal do Parana, Curitiba, PR (Brazil). Centro Politecnico. Dept. de Quimica

    2012-07-01

    Catalyst based on Kegging-type heteropolyacids (H{sub 3}PW{sub 12}O{sub 40} - HPA), supported on SiO{sub 2} (H{sub 3}PW), were prepared by the impregnation method under different thermal treatment conditions. The materials were characterized by different instrumental techniques and used as catalysts in the methyl esterification reactions of stearic acid. Using the catalyst with 15% of HPA, conversions higher than 60% were obtained after 2 h of reaction at 65 deg C. Recovery studies using hot-filtration with ethanol at 75 deg C showed satisfactory activity for two additional reaction cycles. (author)

  15. 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 reservoir was carried out and the possibility of these elements interfering adversely on biota and water quality of this environment. (author)

  16. Evaluation of human dental loss caused by carbamide peroxide bleacher compared with phosphoric acid conditioning - radioactive method; Avaliacao da perda dental humana com o uso do clareador peroxido de carbamida comparado ao condicionamento com acido fosforico - metodo radiometrico

    Energy Technology Data Exchange (ETDEWEB)

    Adachi, Eduardo Makoto; Yousseff, Michel Nicolau [Sao Paulo Univ., SP (Brazil). Faculdade de Odontologia. Dept. de Dentistica; Saiki, Mitiko [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao Neutronica

    2002-07-01

    The radiometric method was applied to the evaluation of dental loss caused by carbamide peroxide when it is applied on the surface layers of enamel and dentin tissues. Also the dental loss caused by the etching with 37% phosphoric acid procedure used in aesthetic restoration was assessed for comparison with those results obtained. The tooth samples irradiated with a P standard in a thermal neutron flux of the nuclear reactor were placed in contact with 10% carbamide peroxide or with 37% phosphoric acid solution. The radioactivity of {sup 32} P transferred from the radioactive teeth to the bleaching gel or to etching acid was measured using a Geiger Muller detector to calculate the mass of P removed in this treatment and losses were calculated after obtaining their P concentrations. Results obtained indicated that enamel and dentin exposed to carbamide peroxide bleaching agent lose phosphorus. The extent of enamel loss was smaller than that obtained for dentin. In the case of acid etching, there was no difference between the results obtained for enamel and dentin loss. Also the dentin loss obtained after a treatment of 30 applications of 10% carbamide peroxide was the same magnitude of that one application of 37% phosphoric acid. (author)

  17. Quantification of micronuclei in blood lymphocytes of patients exposed to gamma radiation for dose absorbed assessment; Quantificacao de micronucleos em linfocitos de pacientes expostas a radiacao gama para a avaliacao da dose absorvida

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Isvania Maria Serafim da Silva

    2003-02-15

    Dose assessment in an important step to evaluate biological effects as a result of individual exposure to ionizing radiation. The use of cytogenetic dosimetry based on the quantification of micronuclei in lymphocytes is very important to complement physical dosimetry, since the measurement of absorbed dose cannot be always performed. In this research, the quantification of micronuclei was carried out in order to evaluate absorbed dose as a result of radiotherapy with {sup 60}Co, using peripheral blood samples from 5 patients with cervical uterine cancer. For this purpose, an aliquot of whole blood from the individual patients was added in culture medium RPMI 1640 supplemented with fetal calf serum and phytohaemagglutinin. The culture was incubated for 44 hours. Henceforth, cytochalasin B was added to block the dividing lymphocytes in cytokinesis. The culture was returned to the incubator for further of 28 hours. Thus, cells were harvested, processed and analyzed. Values obtained considering micronuclei frequency after pelvis irradiation with absorption of 0,08 Gy and 1,8 Gy were, respectively, 0,0021 and 0,052. These results are in agreement with some recent researches that provided some standard values related to micronuclei frequency induced by gamma radiation exposure in different exposed areas for the human body. The results presented in this report emphasizes biological dosimetry as an important tool for dose assessment of either total or partial-body exposure to ionizing radiation, mainly in retrospective dose investigation. (author)

  18. Assessment of atmospheric metallic pollution in the metropolitan region of Sao Paulo, Brazil, employing Tillandsia usneoides L. as biomonitor; Avaliacao da poluicao atmosferica por metais na regiao metropolitana de Sao Paulo, Brasil, utilizando a bromelia Tillandsia usneoides L. como biomonitor

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Claudio Ailton

    2006-07-01

    Tillandsia usneoides L. is an epiphytic bromeliad that lives on trees or other kinds of inert substrates, absorbing water and nutrients directly from the environment without roots. Due to its morphological and physiological characteristics, this species accumulates the pollutants present in the atmosphere. In the present work, Tillandsia usneoides was used as a bio monitor of metal atmospheric pollution in Sao Paulo, Brazil, which is the biggest city in South America with a population of 18 million inhabitants and a strong industrial activity. The urban area is polluted by industrial emissions but, according to the Environmental Protection Agency of the State of Sao Paulo (CETESB), the governmental agency of air quality control, regularly occurring emissions from about 7.8 million motor vehicles provide the principal source of air pollution. The Tillandsia samples were collected from an unpolluted area and were exposed bimonthly in 10 sites of the city with different pollution levels and in a control site. After exposure, trace metals were analyzed in the plant by instrumental neutron activation analysis and ICP-MS (Pb, Cd, Co, Cu, Ni, Sb e V). The results of the investigation showed a notable concentration of Co and Ni in the plants exposed in an industrial area where there is a metal processing plant, which produces about 600 tons/year of Co and 16,000 tons/year of Ni. Copper and chromium were equally distributed in industrial regions and in sites near heavy traffic avenues, suggesting that these elements can be associated to both vehicular and industrial sources. A high accumulation of Cd in the plant exposed in industrial areas indicates industrial activities as the main source of this element. For Pb, no evident sources could be identified so far as it was spread evenly along the monitoring sites. Traffic-related elements such as Zn, Ba and Sb presented high concentrations in plants exposed in sites near to heavy traffic avenues (cars, buses and trucks) and may be associated to vehicular sources. For Zn, the highest contents were related to industrial zones and this element can be associated to the presence of anthropogenic emission sources. The rare earth elements, Fe and Rb, probably have soil particles as main source. (author)

  19. Synthesis and characterization of polyurethanes derived from cyclodextrins and poli (ethyleneglycol); Sintese, caracterizacao e avaliacao da capacidade de inclusao de poliuretanos derivados de cicodextrina e poli(etileno)glicol

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Marcia V.G. de; Vieira, Joao V.F.; Zawadzki, Sonia F., E-mail: zawadzki@ufpr.br [Universidade Federal do Parana - UFPR, Dept. de Quimica, Lab. de Polimeros Sinteticos (LABPOL), Curitiba, PR (Brazil)

    2011-07-01

    Cyclodextrins are natural cyclic oligosaccharides that have the ability to form inclusion complexes with various chemical species. In this work, the polymers with beta-cyclodextrin (BCD) or hydroxypropyl-beta-cyclodextrin (HPBCD) were synthesized from the reaction with poly (ethylene) glycol (PEG400, PEG1500, PEG4000) and diisocyanate, toluene 2,4 and 3,6 (TDI) in a solution of dimethylformamide (DMF). The polymers were characterized by infrared Fourier transform spectroscopy (FTIR), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). The encapsulation capacity was evaluated by calorimetric method of discoloration of the alkaline solution of phenolphthalein. FTIR analysis revealed that assignments confirmed the formation of urethane linkages. TGA was evidenced by the mass loss in three stages and the evaluation results by XRD showed a crosslinking process. The evaluation of the encapsulation capacity of the units of the cyclodextrin crosslinked polymer showed that encapsulation increased proportionally to the mass of polymer used. (author)

  20. Evaluation of specific consumption from the use of chicken oil biodiesel in one cylinder generator set; Avaliacao do consumo especifico a partir da utilizacao de biodiesel de oleo de frango em um grupo-gerador monocilindrico

    Energy Technology Data Exchange (ETDEWEB)

    Fiorese, Diego Augusto [Universidade Federal de Santa Maria (PGEAGRI/UFSM), RS (Brazil). Dept. de Engenharia Rural. Programa de Pos-Graduacao em Engenharia Agricola], E-mail: dafiorese@yahoo.com.br; Lima, Paulo Peruzzo de [Faculdade Assis Gurgacz (FAG), Cascavel, PR (Brazil); Souza, Abel Alves de; Souza, Samuel Nelson Melegari de [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PR (Brazil). Dept. de Ciencias Exatas e Tecnologicas; Dallmeyer, Arno Udo [Universidade Federal de Santa Maria (PGEAGRI/UFSM), RS (Brazil). Programa de Pos-Graduacao em Engenharia Agricola

    2010-07-01

    Biodiesel can be produced from numerous materials, including by-products of animal chain. In this scenario, the chicken's oil, that is located and an environment not explored for biodiesel production, can be a good alternative in South and Southeast Brazilian Region, where they are slaughtered around 9.100.000 chickens per day. In order to determine the specific consumption from a generator set with single cylinder 6.6 kW of power and generation capacity of 5 kW, using chicken oil biodiesel (B-100), were performed the bench test using a auxiliary tank, precision scale and an energy analyzer. Were conducted four treatments (25%, 50%, 75% and 100% of generating capacity). The worst SC was the engine at 25% of generation capacity (1.5 kW) and better with 75% of maximum load (3.75 kW) with a mean of 479.34 g kWh{sup -1}. By Turkey's test ant 5% probability there was a significant difference only for the first treatment. (author)

  1. Synthesis and evaluation of the plant growth regulator property of indolic compounds derived from safrole; Sintese e avaliacao da propriedade reguladora de crescimento vegetal de compostos indolicos derivados do safrol

    Energy Technology Data Exchange (ETDEWEB)

    Marchi, Irineu [Escola Agrotecnica Federal de Rio do Sul, Rio do Sul, SC (Brazil)]. E-mail: marchi@softhouse.com.br; Rebelo, Ricardo Andrade; Rosa, Flavia A. Fernandes da; Maiochi, Riceli A. [Universidade Regional de Blumenau, SC (Brazil). Dept. de Quimica

    2007-07-15

    The present work describes the use of piperonal, a derivative of the secondary metabolite safrole, for the synthesis of new 5,6-methylenedioxy substituted indole carboxylic acids structurally related to the indol-3-yl-acetic acid (AIA, I). The route comprises six steps beginning with piperonal with an overall yield of 19%. Compound IX was tested towards its plant growth regulator properties in bioassays specific for auxine activity. The in vitro assays were performed in a germination chamber and were of two types: root growth in germinated seeds of Lactuca sativa, Cucumbis sativus and Raphanus sativus and peciole biotest using Phaseolus vulgaris. (author)

  2. Evaluation of energy efficiency of climatization system in dairy cattle free-stall; Avaliacao da eficiencia energetica de sistemas de climatizacao em galpoes tipo 'free-stall' para confinamento de bovinos leiteiros

    Energy Technology Data Exchange (ETDEWEB)

    Perissinoto, Mauricio [Escola Superior de Agricultura Luiz de Queiroz (ESALQ/USP), Piracicaba, SP (Brazil). Dept. de Engenharia Rural. Setor de Construcoes Rurais], Email: mperissi@esalqusp.br; Moura, Daniella Jorge de; Lima, Karla Andrea Oliveira de; Mendes, Angelica Signor [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola; Matarazzo, Soraia Vanessa

    2006-07-01

    The objective of this research was the evaluation of the economical efficiency, in relation to water and energy expenses, of two different evaporative cooling systems, misting and sprinkler, associated with forced ventilation. The study was carried out in a commercial dairy cattle farm located in a small city of Sao Paulo State. The experimental period was twenty-eight consecutive days of November 2003. For the economical analysis of each system of climatization the cost with electrical energy and water expended in each system was considered and also the feeding consumption. The sprinkling cooling system presented a greater consumption of water and energy than the misting system. Even those treatments promoting similar feed intake (the difference was 3.0 kg DM.animal{sup -1}.month{sup -1}), the sprinkling system associated to forced ventilation led to an increase (18.0 liters.animal{sup -1}.month{sup -1}) of 3% in milk production. As consequence, it was observed an increase of 5,8% in total month profit in relation to misting system. (author)

  3. 'High throughput': new technique to evaluation of biocides for biofouling control in oil fields; 'High throughput': nova tecnologia para avaliacao da eficacia de biocidas no controle de biofilme na industria do petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Yin, Bei [DOW, IL(United States); Yang, Jeff [DOW, Shangai (China); Bertheas, Ute [DOW, Horgen (Switzerland); Takahashi, Debora F. [DOW, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The wide metabolism diversifications and versatile surviving mechanisms lead to the broad existence of microorganisms in oil fields. Water flooding in secondary production can encourage microbial growth and biofilm build-up. Microbial contamination in oil field can cause many problems including microbiologically induced corrosion, oil and gas souring, deposition of iron sulfide, degradation of polymer additives, and plugging oil and gas pipelines and water purification systems. In general, biocides are needed both topside and down hole to control problematic microorganisms. In this study, a high throughput test method was developed that enables a more realistic determination of biocides efficacy against anaerobic microorganisms commonly found in oil field environments. Using this method, a thorough comparison of several commonly used biocides products in oil field for their efficacy against oil field anaerobic sulfate-reducing bacteria isolates was executed. This study showed that for each individual application, it is important to screen biocides and their combinations against microorganisms cultured from the field. Since biocides vary in their mode of action, this study also demonstrated the critical importance of utilizing the high throughput method for determining the best and most customized solution for each application. (author)

  4. Delphi technique applied to risk identification and assessment on pipe supports fabrication and erection contracts; Aplicacao da tecnica Delphi para identificacao e avaliacao de riscos na contratacao e montagem de suportes de tubulacao

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, Rodrigo Luiz Neves; Balbi, Diego Junca de Gonzaga [Promon Engenharia, Sao Paulo, SP (Brazil)

    2012-07-01

    Through the years, Risk Management became an accepted subject in Brazilian Organizations, with its own language, techniques and tools; and its processes are being more and more often introduced in its management models. However, risk identification, assessment and management is a difficult task, and can be even more difficult for construction industry-related projects, for these ventures tend to be more dynamic and complex. In this sense, the objective of this paper is to present the application of Delphi technique for risk identification in the erection of piping support. To achieve the desired objective, a literature review of theory references was conducted to understand concepts involved. To apply the technique itself, experts in plant erection were involving. (author)

  5. Evaluation of natural radioactivity in some granitic rocks in the state of Parana, Brazil and its use in civil construction; Avaliacao da radioatividade natural em algumas rochas graniticas do estado do Parana e sua utilizacao na construcao civil

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Ademar de Oliveira

    2013-07-01

    Primordial, or terrestrial natural radionuclides, are found in different amounts in the environment. In dwellings, an important dose increment is due to building materials, which contribute for both the external gamma dose from the radionuclides of the {sup 238}U, {sup 235}U and {sup 232}Th series and the natural {sup 40}K and the internal dose, due mainly to {sup 222}Rn inhalation. Once granitic rocks are widely used both as construction materials or structural flooring, those rocks can become an important dose source, depending on the content of concentrations of radioactivity, and the construction application. In this work, a database for granitic rocks of the crystalline shield of Parana (mainly in the Metropolitan Region of Curitiba, RMC), used in civil construction, was generated, evaluating in terms of radiological protection the external and internal dose increments, caused by the use of these materials. Also, possible correlations between the {sup 226}Ra activity concentration, the {sup 222}Rn exhalation rate, density, porosity and chemical composition (oxide content) in these samples had been studied. The external dose was assessed by gamma-ray spectrometry with High-Purity Germanium detectors, where the activity concentration of the radionuclides {sup 232}Th, {sup 226}Ra and {sup 40}K are the parameters used in dosimetric models (Dosimetric Indexes), which established limits in accordance with the form, amount and application of material of construction. For the calculation of the annual effective external dose it was assumed a room model with dimensions of 4 m x 5 m x 2:8 m and all walls internally covered with 2 cm thickness of granite and an annual exposure time of 7000 h as suggested by the European Commission of Radiological Protection for internal superficial coating materials. The internal exposure was assessed from the radon concentration in the air of the room model, simulated from the superficial exhalation rate of {sup 222}Rn. The exhalation rate was determined by the passive detection technique with the Solid State Nuclear Track Detectors (CR-39) and the sealed can technique, assuming a ventilation rate of 0.5 h{sup -1} and an annual exposure time of 7000 h. The results for this studies show that the annual effective dose ranged from (62 {+-} 3) {mu}Sv.y{sup 1} to (138 {+-} 1) {mu}Sv.y{sup -1} and the internal annual effective dose ranged from (0,39 {+-} 0,04) {mu}Sv.y{sup -1} to (70 {+-} 4) {mu}Sv.y{sup -1}. These values are below the maximum limit of 1 mSv.y{sup -1} suggested by the European Commission of Radiological Protection, meaning that the granitic rocks evaluated can be used without radiological implications since the considered scenario is obeyed. The values obtained for the contribution due to the internal dose ranged from 1 % to 78 % of the values obtained for the respective external dose showing the radon contribution varies strongly with the rock type. The results of the correlations between {sup 222}Rn superficial exhalation rate, {sup 226}Ra activity concentration, density, porosity and major oxides of the samples, showed that, in terms of influence in the emanation fraction of radon, the most important parameter is the density, due to low porosity and similarity in terms of chemical composition amid the studied samples. (author)

  6. Energy evaluation of soil preparation for deployment of the eucalyptus culture: a subsidy for sustainable analysis; Avaliacao energetica do preparo do solo para implantacao da cultura de eucalipto: subsidio para uma analise de sustentabilidade

    Energy Technology Data Exchange (ETDEWEB)

    Bueno, Osmar de Carvalho [Universidade Estadual Paulista (UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Gestao e Tecnologia Agroindustrial; Quintana, Nuria Rosa Gagliardi [Universidade Estadual Paulista (UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Programa de Pos-Graduacao em Energia na Agricultura

    2004-07-01

    The knowledge of the production and expenditure of energy for the agriculture are fundamental due, among other factors, to the strategic importance that occupies as producing of energy input for other economic sections. With the objective of presenting the participation of the several energy types employees in the soil prepare for implantation of the eucalyptus culture, this work is constituted in a contribution regarding the subject of the sustain grow. It was determined that the field hypothetical to be prepared possesses soil with sandy texture and raise plan or soft-wavy, where the minimum cultivation of the soil allows without problems, the use of 'subsolador florestal multifuncional'. The silviculture practical, linked to the minimum cultivation of the soil in the implantation of the culture was: liming, court of the residues and roots, subsoil, basic fertilizing, control chemical of undesirable plants and control chemical of ants. The technical coefficients, the work day, the revenue, the identification of the tractors, implements and equipment; its specifications and respective consumption of fuel, lubricants and greases, besides the quantification of the labor used by silviculture practical, were certain starting from collected secondary data. The adopted methodological procedures were based in literature revision. In agreement with the obtained results, it was ended that of the total of energy maid's 3.309,62 MJ for hectare in the soil prepare, it is had the participation of 83,30% of industrial energy, 16,52% of fossil energy and 0,18% of biological energy. It was verified like this that the dependence of the industrial energy and of the fossil energy in the soil prepare. In that way, we suggest himself the search of the use of another types of energy that they allow the energy sustainability of this agro-ecosystems. (author)

  7. Marginal microleakage in vitro study of occlusal fissures sealing prepared and etched or not with Er: YAG laser; Avaliacao in vitro da microinfiltracao marginal em selamentos oclusais preparados e condicionados ou nao pelo laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Youssef, Fernanda de Almeida

    2004-07-01

    The aim of this in vitro study was to evaluate the degree of marginal microleakage in occlusal sealing by invasive techniques, after preparation with Er:YAG laser followed or not by Er:YAG laser etching and compared to the conventional technique. Thirty human premolars were divided into three groups: A (control group) - cavities were prepared with high speed and etched with 37% orthophosphoric acid; group B - cavities were prepared with Er:YAG (350 mJ, 4 Hz and 112 J /cm{sup 2}) and etched with 37% orthophosphoric acid; group C - cavities were prepared with Er:YAG laser (350 mJ, 4 Hz and 112 J/cm{sup 2}), and etched with Er:YAG laser (80 mJ, 4 Hz and 25 m/cm{sup 2}). All cavities were treated with the same adhesive system and restored with flow composite according to manufacturer instructions. Teeth were submitted to thermal cycling procedures and immersed in 50% Silver Nitrate Solutions for 8 hours in total darkness. Teeth were sectioned longitudinally in the bucco-lingual direction, in slices of 1 mm thick. Each slice was immersed into photo developing solution under 16 hours of fluorescent light. Slices were photographed and microleakage was scored from 0 to 7 J by three standard examiners. Results showed statistically significant differences for group C (Er:YAG laser preparation and etching). We concluded that Er:YAG laser can be used for cavity preparation of occlusal sealing, like the conventional high speed method. However, this laser, used as enamel etching agent, could not promote an adequate surface for adhesive procedures. (author)

  8. Intrapulpal temperature during preparation with the Er:YAG laser: an in vitro study; Avaliacao da temperatura intrapulpar de incisivos bovinos irradiados com o laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Geraldo-Martins, Vinicius Rangel

    2003-07-01

    This study evaluated the variation of the pulp chamber temperature when dentine, with 2,0 mm of thickness, adjacent to the pulp, was irradiated by the Er:YAG laser. Seventy two bovine incisors were used, that had the enamel and dentine of the buccal surface weared until to reach the thickness used in this study. The teeth were divided in 3 groups, according with the repetition rate used ( Group I = 2 Hz; Group II = 4 Hz and Group III = 6 Hz), and irradiated, with or without water cooling, using 250, 300 and 350 mJ of energy per pulse. Thermocouples were introduced inside the pulp chamber through the palatine opening of the samples and fixed to the vestibular wall of the pulp chamber using a thermal paste. After the statistical analysis, it was verified that there was a decrease of the intrapulpal temperature for all of the parameters in the group I irradiated with water cooling. In the same group, but without cooling, occurred increases of the intrapulpal temperature, however they were less than 2 deg C. In the group 11, only the para meter 350 mJ/4 Hz/ with water cooling presented decrease of the temperature (-0,08 deg C). The other irradiations presented increase of the intrapulpal temperature, varying from 1,5 to 1,9 deg C for irradiations without cooling and of 0,03 the 0,58 deg C for the samples irradiated under water cooling. In the group III, all of the samples presented increase of the intrapulpal temperature, however, they were smaller than to 2,5 deg C. The conditions of this study allow to conclude that the use of the laser of Er:YAG promoted acceptable temperature increases inside the pulp chamber, not reaching the critical level of 5,5 deg C. However, in spite of the temperature variations inside the pulp chamber have not reached critical levels, this procedure should not be recommended because macroscopic observations of the dentine irradiated without water cooling showed dark lesions, suggesting carbonization of this tissue. (author)

  9. Dosimetric evaluation of the Fricke gel dosimeter using the spectrophotometric technique for application in electron and neutron dosimetry; Avaliacao dosimetrica da solucao Fricke gel usando a tecnica de espectrofotometria para aplicacao na dosimentria de eletrons e neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Mangueira, Thyago Fressatti

    2009-07-01

    In this work the main dosimetric characteristics of the Fricke Xylenol Gel (FXG) solution were established for further application in the measurement of dose distribution of clinical electron fields. The dose-response curves of the FXG in a neutron field were also evaluated for the research in Boron Neutron Capture Therapy (BNCT) and industrial electron fields. The standard reading technique was the spectrophotometric. For the clinical field, the intra and inter-batch reproducibility are better than 1.4% and 5.1 %, respectively, the response presents a linear behavior for doses ranging from 0.2 to 40 Gy independently of the energy and the dose rate in the studied ranges. Due to the effects of the FXG natural oxidation, the optimum elapsed time between FXG preparation and irradiation was established as 24h period and the behavior of the dose-response curve of the FXG using the variation in the absorbance relative to the non-irradiated dosimeter as a basis during the whole studied period were not altered. The dose-response to the industrial electron beam presented an exponential decreasing behavior and the neutron beam for research in BNCT presented a linear behavior for the complete studied dose range. According to the obtained results for the different types of radiation studied for the FXG, there was no change in the position of the characteristic bands of the absorption spectrum due to the interaction of these radiation types. Additional tests were performed to determine the digital photographic imaging of FXG analyses viability and the application of FXG dosimetry on intracavitary brachytherapy. The good performance of the FXG dosimeter in the tests that were carried out indicates that this dosimeter may be applied to the tri-dimensional dose evaluation in radiotherapic treatments using electrons and neutron beams. (author)

  10. Dosimetric evaluation of the Fricke gel dosimeter using the spectrophotometric technique for application in electron and neutron dosimetry; Avaliacao dosimetrica da solucao Fricke gel usando a tecnica de espectrofotometria para aplicacao na dosimetria de eletrons e neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Mangueira, Thyago Fressatti [Instituto de Pesquisas Energeticas e Nucleares (GMR/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Centro de Metrologia das Radiacoes

    2011-07-01

    The main dosimetric characteristics of the Fricke Xylenol Gel (FXG) solution were established for further application in the measurement of dose distribution of clinical electron fields. The dose-response curves of the FXG in a thermal neutron field were also evaluated for application in Boron Neutron Capture Therapy (BNCT) and industrial electron fields. The standard reading technique was the spectrophotometry. For clinical fields the intra and inter-batch reproducibility of FXG solution are better than 1.4% and 5.1%, respectively. The optical response presents a linear behavior for doses ranging from 0.2 to 40 Gy independently of the electron energy and the dose rate in the studied ranges. Due to the effects of the FXG natural oxidation, the optimum elapsed time between FXG preparation and irradiation was established as 24h. The behavior of the dose-response curve does not change the obtained absorbance values relative to the non-irradiated dosimeter response during the studied period. The dose-response curve to industrial electron beam presented an exponential decreasing behavior. The optical response to thermal neutrons beam presented a linear behavior for the studied dose range. According to the obtained results to the different radiation fields studied it was not observed changes in the wavelength of the typical bands of the absorption spectrum radiation induced. Additional tests were performed with FXG solution to verify the viability and application of FXG dosimetry on intracavitary brachytherapy using digital photographic imaging. The excellent performance of the FXG dosimeter indicates that this dosimeter may be applied to tri-dimensional dose evaluation in radiotherapy treatments using electrons and neutron beams. (author)

  11. 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)

  12. Evaluation of fracture toughness in dental ceramics using indentation and SEVNB (Single Edge V-Notched Beam)-method; Avaliacao da tenacidade a fratura de ceramicas dentarias atraves do metodo de entalhe - SEVNB (Single Edge V-Notched Beam)

    Energy Technology Data Exchange (ETDEWEB)

    Santos, L.A.; Santos, C.; Souza, R.C.; Ribeiro, S. [Universidade de Sao Paulo (DEMAR/EEL/USP), Lorena, SP (Brazil). Escola de Engenharia de Lorena. Dept. de Engenharia de Materiais. Polo Urbo-Industrial; Strecker, K. [Universidade Federal de Sao Joao del-Rei (DME/UFSJ), MG (Brazil). Dept. de Materiais Eletricos; Oberacker, R. [Karlsruhe Univ. (Germany)

    2009-07-01

    In this work, the fracture toughness of different ceramics based on Al{sub 2}O{sub 3} and ZrO{sub 2} were evaluated using, comparatively two methods, Vickers indentation and SEVNB (Single Edge V-Notched Beam) method. Al{sub 2}O{sub 3}, ZrO{sub 2}(3%Y{sub 2}O{sub 3}) micro-particled and ZrO{sub 2}(3%Y{sub 2}O{sub 3}) nanometric, ZrO{sub 2}-Al{sub 2}O{sub 3} and Al{sub 2}O{sub 3}-ZrO{sub 2} composites were sintered at different temperatures. Samples were characterized by relative density, X-ray diffraction, SEM, and mechanical evaluation by hardness, bending strength and fracture toughness obtained by ickers indentation and SEVNB-method. The results were presented comparing the densification and microstructural results. Furthermore, the advantages and limitations of each method were discussed. (author)

  13. Evaluation of CFD numerical models for the study of the flow of water from the RMB pool; Avaliacao de modelos numericos de CFD para o estudo do escoamento de agua da piscina do RMB

    Energy Technology Data Exchange (ETDEWEB)

    Palmieri, Bruno Leonhardt; Santos, Andre Augusto Campagnole dos; Rezende, Hugo Cesar, E-mail: blp@cdtn.br, E-mail: aacs@cdtn.br, E-mail: hcr@cdtn.br [Centro de Desenvolvimento de Tecnologia Nuclear (CDTN/CNEM-MG), Belo Horizonte, MG (Brazil); Schweizer, Fernando Lage Araujo, E-mail: flas@cdtn.br [Universidade Federal de Minas Gerais (DEN/UFMG), Belo Horizonte, MG (Brazil). Dept. de Energia Nuclear

    2013-07-01

    In this work two numerical models were developed for the study of the flow in the pool of the Brazilian Multipurpose Reactor-RMB using two computer codes: FLUENT and CFX. The codes presents big differences that may affect the results and performance of the simulation. An example is the mesh, which can be fully composed of regular hexahedral and present local refinement in FLUENT, due to the implementation of the solution focused on the element, which is not possible in CFX, which takes a node-centric solution. The temperature profiles were evaluated over the time of simulation. The research and the defining of an appropriate and optimized numerical model will be of fundamental importance for the RMB hot water layer project.

  14. Evaluation of polymer efficiency on the inhibition of calcium carbonate scale in synthetic brines; Avaliacao da acao de polimeros sobre a inibicao de incrustacoes de carbonato de calcio em salmouras sinteticas

    Energy Technology Data Exchange (ETDEWEB)

    Freitas, Juliana M.; Rodrigues, Jessica S.; Loureiro, Tatiana S.; Lucas, Elizabete F.; Spinelli, Luciana S. [Universidade Federal do Rio de Janeiro, Instituto de Macromoleculas, Laboratorio de Macromoleculas e Coloides na Industria de Petroleo, RJ (Brazil)], e-mail: julianamatos@ima.ufrj.br

    2011-07-01

    The inorganic scale results in serious problems for oil production. This scale results from the incompatibility between the chemical compositions of formation water and injection, and the changes of thermodynamic system. These deposits consist mainly of calcium carbonate and barium sulfate. In order to prevent the formation of these deposits, the petroleum industry has made use of chemicals that act as scale inhibitors. The aim of this study was to test the ability of two types of polymeric inhibitors prevent the formation of calcium carbonate from brines of different compositions with high concentrations of calcium. The inhibitors were tested at varying concentrations and at fixed conditions of temperature, pH, pressure and time. The estimated effectiveness of each inhibitor was measured by complexometric titration. The inhibitor carboxylic acid-based (poly (maleic acid)) was more efficient at relatively low concentrations, which is important both economically and environmentally. (author)

  15. Effects of gamma radiation of Cobalt-60 on arabica and conillon seeds coffea: physic-chemistry evaluation; Efeitos da radiacao gama do Cobalto-60 em sementes de cafe arabica e conillon: avaliacao fisico-quimica

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcus Henriques da

    2012-07-01

    Brazil is the largest producer and exporter of coffee in the world. The coffee bean is one of the main products of the Brazilian trade balance. Two species of coffee are the most economically important: the Coffea arabica L. and Coffea canephora Pierre is the largest representative of the Coffea canephora Pierre is the coffea conillon. Food irradiation is an area of research that aims to increase the shelf life of foods and controlling pests. This study aimed to verify the physicochemical variables of Arabica coffee and conillon were affected when exposed to doses of gamma radiation from cobalt-60. The samples were provided by Polo in Coffee Quality Technology, Federal University of Lavras - UFLA. The coffee samples were subjected to irradiation doses: 0 (control), 5 kGy and 10 kGy, a multipurpose irradiator of IPEN - Research Institute of Nuclear Energy and the University of São Paulo, at a rate of 7.5 kGy / hour. For irradiation the samples were vacuum-packed in appropriate packaging aluminised. After the process of irradiation the samples were stored at a temperature of 15 ± 1 deg C and relative humidity of 17 ± 1%. The following analyzes were performed: levels of total sugars, glucose, sucrose, caffeine, humidity, pH, total acidity, electrical conductivity and fibers. Analyses were performed 1, 30, 60 and 90 days after irradiation, and the results were submitted to analysis of variance and means were compared by Tukey test at 5%. It was observed that the analysis results of the samples irradiated with 5 kGy and 10 kGy showed values similar to the control. It was concluded that irradiation did not induce deleterious effects on arabica coffee seeds and conillon irradiated with 5 kGy and 10 kGy to 90 days after irradiation. (author)

  16. Are the imaging findings used to assess the portal triad reliable to perform living-donor liver transplant?; Os achados de imagem para avaliacao da triade portal sao confiaveis para realizacao do transplante hepatico com doador vivo?

    Energy Technology Data Exchange (ETDEWEB)

    Dazzi, Francisco Leoncio; Ribeiro Junior, Marcelo Augusto Fontenelle; Mancero, Jorge Marcelo Padilla; Gonzalez, Adriano Miziara; D' Albuquerque, Luiz Augusto Carneiro, E-mail: franciscodazzi@hotmail.com [Hospital Beneficencia Portuguesa, Sao Paulo, SP (Brazil). Departamento de Cirurgia Geral e Transplante; Leao-Filho, Hilton Muniz [Hospital Beneficencia Portuguesa, Sao Paulo, SP (Brazil). Departamento de Radiologia e Diagnostico por Imagem; Silva, Adavio de Oliveira e [Hospital Beneficencia Portuguesa, Sao Paulo, SP (Brazil). Departamento de Gastroenterologia e Hepatologia

    2013-07-01

    Background: a crucial aspect of living-donor liver transplant is the risk imposed to the donor due to a procedure performed in a healthy individual that can lead to a high postoperative morbidity rate Aim: To correlate the pre- and intraoperative hepatic imaging findings of living adult donors. Methods: From 2003 to 2008 the medical charts of 66 donors were revised; in that, 42 were males (64%) and 24 females (36%), mean age of 30±8 years. The preoperative anatomy was analyzed by magnetic resonance cholangiography to study the bile ducts and by computed tomography angiography to evaluate the hepatic artery and portal vein. Normalcy criteria were established according to previously published studies. Results: Anatomic variations of the bile ducts were found in 59.1% of donors, of the artery hepatic in 31.8% and of the portal vein in 30.3% of the cases during the preoperative period. The magnetic resonance cholangiography findings were in agreement in 44 (66.6%) of donors and in disagreement in 22 (33.3%). With regards to hepatic artery, in all donors the findings of the imaging examination were in agreement with those of the intraoperative period. As to the portal vein, the computed tomography findings were in agreement in 59 (89.4%) donors and in disagreement in seven (10.6%). Conclusions: the bile duct anatomic variations are frequent, and the magnetic resonance cholangiography showed moderate accuracy (70%) in reproducing the surgical findings; the computed tomography reproduced the intraoperative findings of the hepatic artery in 100% of donors, and of the portal vein in 89.4% of the cases, thus demonstrating high accuracy (89%). (author)

  17. Development of a model for strategic evaluation of the global performance of the Brazilian Nuclear Energy Commission; Desenvolvimento de um modelo para avaliacao estrategica do desempenho global da Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Staude, Fabio

    2003-07-01

    A conscious, effective course of action, now essential to several areas and organizations, has become a must in the public administration. In this sense, modem managerial practices may contribute significantly for governmental organism to take up an attitude shifted to results in the society, without losing its eminently public function. In order to measure the social impact of the activities of the State as a whole, institutions must use mechanisms that allow self-evaluations of their performance, so as to verify the return obtained as a result of their efforts. However, most institutions do not have structured tools for such evaluation. The present study proposes to the Comissao Nacional de Energia Nuclear a model to measure its global performance, offering a proposed architecture for the measurement system in accordance with the results of the planning process of the Institution. The methodology presented also comprises the definition of cause-and-effect critical models between the strategic objectives of the organization and its respective factors critic ai for success, as well as related performance indicators. This work also includes the breakdown of the measurement system for the macro processes of the organization, optimizing resource sharing and the flow of information, avoiding redundant efforts and bringing forth further advantages aiming at creating a organizational 'unit'. Within this context, the developed model may offer substantial help for the improvement of the maturity of the organization in goal-oriented management, considering that the proposed global performance measurement follows a planned structure, with a systemic approach of the organization, allowing that the process be carried out in a way that is transparent and objective. (author)

  18. Evaluation in vitro of pulpal chamber temperature of deciduous teeth during Er:YAG laser application; Avaliacao in vitro da temperatura na camara pulpar de dentes deciduos durante aplicacao do laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Sznajder, Alexandre Joseph

    2001-07-01

    The Er:YAG laser technology has been thoroughly studied, since its invention, and has been increasingly recommended in Dentistry. However, its use in deciduous teeth has not been deserving the equivalent attention to its counterpart in permanent teeth, despite of the deciduous teething occur in a phase of life in which it has a far more importance than its substitutes. For that reason, this study aims to identify the suitable parameters to the clinic procedures in deciduous teeth, using the already established protocols in permanent teeth. The study was lead in a way to resemble the most the conditions of the clinical use of the laser. Five groups were analyzed using different energy densities and repetition rates. Each group was composed of 10 first superior right deciduous molars randomly selected. The energy densities and repetition rates used for each group were: 60 mJ 15 Hz, 250 mJ 2 Hz, 250 mJ 15 Hz, 400 mJ 6 Hz and 500 mJ 2 Hz. The results obtained allowed us to conclude that the use of the Er:YAG laser in Odontopediatrics is effective, safe and secure and the main reason for its recommendation is the low transfer of heat to the adjacent tissues of the applied surfaces. (author)

  19. Root planing with Er:YAG laser X Gracey curette, a study in vitro in scanning electron microscopic study; Avaliacao em microscopia eletronica de varredura da superficie radicular, raspada e alisada com Er: YAG laser

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Fabiano Augusto Sfier de

    2000-07-01

    The Er:YAG laser has been studied as a periodontal therapies, used to remove subgingival calculus and its bactericidal effects. The proposal of this study is to evaluate the effectiveness of the Er:YAG laser in root planing in comparison to the traditional method, not surgical. Six recently extracted due to the disease periodontal, were cut longitudinally, tends like this two half of the root. These half were separate in four groups. The first group is the natural tooth (group controls negative), the second group (group controls) was accomplished to root planing with Gracey curette. And in the third to Er:YAG laser with a contact tip, using a 45 deg angle in relation to the root; in the fourth group was scraped and planned with Er:YAG laser and complemented root planing with Gracey curette. The used energy was of 100 mJ (out put) and the frequency of 10 Hz accomplished with irrigation. The obtained results were similar in the groups 2 and 3 in comparison to the amount of smear-layer. In group 4 however, better result was obtained, because the image (SEM) was much more regular and with less amount of smear-layer. The conclusion of the work is that with the association of the laser technique and Gracey curette the results are superior to the conventional treatment. (author)

  20. Applications of API RP 1102 in stress analysis of buried pipelines at automated cultivation land; Avaliacao de tensoes em dutos enterrados, em area de cultura mecanizada, a luz da norma API RP 1102

    Energy Technology Data Exchange (ETDEWEB)

    Spagnolo, Rodrigo Alves; Castro, Newton Camelo de [PETROBRAS Transportes S.A. (TRANSPETRO), Rio de Janeiro, RJ (Brazil)

    2005-07-01

    According to the development of the agriculture business in the Midwest of Brazil, it can be noted that the cultivated land has imposed to the right of way pipeline weight and quantity increasing of vehicles moving above TRANSPETRO pipelines. This paper has the objective promoting discussions about this theme, presenting preceding conclusions when analyzing pipeline stresses, when the pipeline equipment are submitted to great loadings of agricultural machines. In order to execute this analysis, analytical formulations were used to compute static and dynamic loadings. These evaluations were referenced from API RP 1102 american norm. Many loading simulations, with different operating and environment configurations to the buried installations, were realized. These data were applied having the purpose of diagnosing typical situations existing in automated cultivated land crossings, related to OSBRA (Oleoduto Sao Paulo - Brasilia) right of way pipeline. (author)

  1. Image quality and volume computed tomography air kerma index (C{sub vol}) evaluation in Recife; Avaliacao da qualidade de imagem e do indice volumetrico de Kerma ar em tomografia computadorizada (C{sub vol}) em Recife

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Marcos Ely Almeida

    2008-07-01

    The Computed Tomography (CT) is an important diagnostic imaging method, widely used. However, in spite of all the advantages and technologic advances within the CT scanners, the tomographic procedures result in high absorbed doses to patients. The main objective of this work was to perform a dosimetric study of CT scanners located at Recife and to evaluate the image quality on CT examinations in these equipment. The volume CT air kerma index (C{sub VOL}) and air kerma length product (P{sub KL,CT}) were estimated. These values were calculated using normalized weighted air kerma indexes in CT standard dosimetry phantoms ({sub n}C{sub W}), supplied by ImPACT group for several CT scanners, and the scan parameters of routine head, routine chest and hi-resolution chest CT exams performed at 20 institutions. The irradiation parameters of 15 adult patients for each CT procedure were registered at six participating centres, at which the phantom from the American College of Radiology (ACR) CT accreditation protocol was used for the image quality measurements. For routine head exams, the C{sub VOL} values varied between 12 and 58 mGy (at the posterior fossa) and 15 to 58 mGy (at the cerebrum) and the P{sub KL,CT}, from 150 to 750 mGy{center_dot}cm. The C{sub VOL} values for routine chest procedures varied from 3 to 26 mGy and the P{sub KL,CT}, between 120 and 460 mGy{center_dot}cm. In relation to Hi-resolution chest exams, C{sub VOL} values were from 1.0 to 2.7 mGy and the P{sub KL,CT} values varied between 24 and 67 mGy{center_dot}cm. The image quality evaluations results showed that almost all scanners presented at least one inadequacy. One of the equipment presented faults at 70% of the tests. With regard to the image noise, only two scanners presented acceptable results. From these results, it is possible to conclude that the volume CT air kerma index values are lower than the European reference levels. However, the image quality of these CT scanners does not attend the ACR requirements, suggesting the need to implement quality assurance programs at the evaluated institutions. (author)

  2. Economic evaluation of photovoltaic electric power generation connected to the grid in deregulated electric power markets; Avaliacao economica da geracao de energia eletrica fotovoltaica conectada a rede em mercados eletricos desregulados

    Energy Technology Data Exchange (ETDEWEB)

    Zumaran, David Richard Orosco

    2000-12-01

    This work presents an analysis of economic, tariff and regulating issues related to the introduction of Grid Connected Photovoltaic Systems in a deregulated electric market context; a case study for the peruvian electric market is realized. Based on the pricing system of the electric market, it is developed an economic assessment model that can be used by institutions interested in promoting this technology for generating electricity. (author)

  3. Evaluation of the attenuation of the lead aprons with different lead equivalences for use in radiology services; Avaliacao da atenuacao de aventais plumbiferos com diferentes equivalencias de chumbo para uso em servicos de radiologia

    Energy Technology Data Exchange (ETDEWEB)

    Pimentel, Juliana, E-mail: juliana.pimentel@pucrs.br [Hospital Sao Lucas (HSL/PUCRS), Porto Alegre, RS (Brazil); Borgonhi, William Mello, E-mail: borgonhi@gmail.com [Instituto Pro Universidade Canoense (IPUC), Canoas, RS (Brazil); Vanni, Stefania, E-mail: stevannni87@gmail.com [Assessoria em Fisica Medica (AFIM), Porto Alegre, RS (Brazil)

    2014-07-01

    This work has the aim to evaluate the attenuation of personal protective gear of lead rubber with equivalence of 0.25 and 0.50 mmPb, the scattered radiation. It was used as a radiation emitter, a x-ray equipment brand GE® Model XR6000 with maximum voltage of 150 kVp, the maximum electric current of 630 mA. How spreader object was used a cylindrical acrylic simulator with measures 32 cm by 15 cm. To collect the measurements was used the ionizing chambers Fluke Biomedical® Victoreen® model 451B-DE-SI. The individual protective clothing evaluated were two rubber aprons with equivalence of 0.25 and 0.50 mmPb. To perform the experiment the simulator equipment was placed on the table aligned with the primary beam with focus-film distance of one meter. Were used as exposure parameters 85 kVp, 80 mA and 2.5 sec. Recordings were carried out at distances from 50 to 250 cm, ranging from 25 to 25 cm. For each distance were made four measures in the air and four measures with each VPI in front of the meter, checking the equivalent dose rate and tabling the values obtained. For aprons with equivalence 0,25mmPb average attenuation obtained was 94.05%, with standard deviation of 1.36. As for the aprons with 0,50mmPb the affected attenuation was 97.6%, with deviation of 0.75. From the results of this assessment, it is evident the importance of radiological protective clothing in the routines of individuals occupationally exposed to X-ray.

  4. Evaluation of the response of thermoluminescent detectors in clinical beams dosimetry using different phantoms; Avaliacao da resposta de detectores termoluminescentes na dosimetria de feixes clinicos utilizando diferentes objetos simuladores

    Energy Technology Data Exchange (ETDEWEB)

    Matsushima, Luciana Cardoso

    2010-07-01

    Radiotherapy is one of the three principal treatment modalities used in the treatment of malignant diseases such as cancer, the other two are chemotherapy and radiosurgery. In contrast to other medical specialties that rely mainly on the clinical knowledge and experience of medical specialists, radiotherapy, with its use of ionizing radiation in treatment of cancer, relies heavily on modern technology and the collaborative efforts of several professionals whose coordinated team approach greatly influences the outcome of the treatment. In the area of clinical dosimetry, an efficient and accurate calibration of the radiation beam ensures knowledge of the radiation dose delivered to the patient, allowing thus the success of radiotherapy. This study aims to compare the thermoluminescent response of calcium sulfate doped with dysprosium (CaSO{sub 4}:Dy) dosimeters produced by IPEN (6 mm in diameter and 0,8 mm tick) with the response of lithium fluoride (3,15 x 3,15 x 0,9 mm{sup 3}) doped with magnesium and titanium (LiF:Mg,Ti) in dosimetry of clinical photons (6 and 15 MV) and electrons beams (6 and 9 MeV) using solid water (RMI-457), water and PMMA phantoms. Initially, the dose-response curves were obtained for irradiation in cobalt-60 gamma radiation source in air (PMMA plates) and under electronic equilibrium conditions and for clinical electrons and photons beams at depth of maximum dose. The sensitivities of the thermoluminescent dosimeters were also evaluated and the values of their reproducibilities and intrinsic efficiency were determined for the response to different types of phantoms and radiation energy. The obtained results indicate that the main advantage of CaSO{sub 4}:Dy dosimeters is the enhanced sensitivity to radiation doses measured for {sup 60}Co, photons and electrons beams, thus representing a viable alternative for application in dosimetry in the radiotherapy area. (author)

  5. Proficiency tests for evaluation of the {sup 99}Tc{sup m} measurements in the nuclear medicine; Aplicacao de teste de proficiencia para avaliacao da medicao de {sup 99}Tc{sup m} na medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Iwahara, Akira; Tauhata, Luiz; Oliveira, Antonio Eduardo de, E-mail: iwahara@ird.gov.b, E-mail: tauhata@ird.gov.b, E-mail: aedu@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Nicoli, Ieda Gomes, E-mail: ieda@ird.gov.b [Comissao Nacional de Energia Nuclear (CNEN/DF), Brasilia, DF (Brazil). Escritorio de Brasilia; Alabarse, Frederico Gil; Xavier, Ana Maria, E-mail: falabarse@ird.gov.b, E-mail: axavier@ird.gov.b [Comissao Nacional de Energia Nuclear (ESPOA/CNEN-RS), Porto Alegre, RS (Brazil). Escritorio de Porto Alegre

    2009-07-01

    This work performs the performance evaluation of 55 Brazilian nuclear medicine services in activity measurement of radiopharmaceutical containing {sup 99}Tc{sup m}. Proficiency tests based on the acceptance criteria of the Regulation ISO/IEC Guide 43-1 and on the accuracy of the brazilian Regulation CNEN-NN-3.05 were applied in 63 results of activity measurements in radionuclide calibrators used by those services. The performance services has shown that the criteria of the ISO/IEC 43-1, nevertheless to be more restrictive, presents results very consistent with the accuracy criteria requested by the Brazilian regulation

  6. Study of crotoxin mechanism of action to mammary carcinomas and evaluation of its potential as a radiopharmaceutical; Estudo do mecanismo de acao da crotoxina em tumores mamarios e avaliacao do seu potenctial radiofarmaceutico

    Energy Technology Data Exchange (ETDEWEB)

    Silveira, Marina Bicalho

    2010-07-01

    Crotoxin, the main component of Crotalus durissus terrificus snake venom, has been studied since 1938. It is a natural polypeptidic complex with pharmacological potential because of its antitumoral properties which has attracted great interest for diagnosis and therapy of oncological diseases. However, Crotoxin mechanism of action and sites of specific interaction on tumor cells are still misunderstood. Breast cancer is the second most frequent type in the world and the most common cancer in women. About 30 to 60% of mammary tumors overexpress epidermal growth factor receptor (EGFR), a transmembrane protein related to cell proliferation. Since literature has reported that Crotoxin antitumoral effect is more potent on cells with EGFR overexpression the objectives of this work were to evaluate Crotoxin cytotoxic effects on mammary tumor cells human breast carcinoma (MCF-7) and Ehrlich tumor cells (murine ascitics carcinoma), and to investigate the specific molecular interaction of Crotoxin on Ehrlich tumor cells. Initially, Crotoxin was radiolabelled with iodine-125 ({sup 125}I-Crotoxin) and iodine-131 ({sup 131}I-Crotoxin). Saturation and competition assay were carried out to characterize Crotoxin in vitro interaction; Crotoxin biodistribution studies and singlephoton emission computed tomography (SPECT) of mice bearing Ehrlich tumor have been evaluated to describe in vivo interaction. Our results showed that Crotoxin presented cytotoxic effect against Ehrlich with DL{sub 50} in vitro (concentration of compound which is lethal for 50% of cells) of about one micromolar, but did not present significant effect against MCF-7. Morphological alterations characteristic of apoptosis suggests programmed cell death. {sup 125}I-Crotoxin interaction with Ehrlich tumor cells was saturable with approximately 70% specificity, and presented K{sub d}=24.98 nmol/L and B{sub max}=16,570 sites/cell for low affinity binding sites and K{sub d}=0.06 nmol/L and B{sub max}=210 sites/cell high affinity binding sites; moreover, the radiolabeled polypeptide interaction showed low specificity toward to MCF-7 (37%). EGF reduced 20% of {sup 125}I-Crotoxin specific binding, so specific binding sites of Crotoxin on Ehrlich tumor cells partially overlap to EGFR. Crotoxin biodistribution studies showed significant uptake in the tumor paw (tumor/skeletal muscle ratio= 18.55), three hours after administration. SPECT imaging also showed tumor uptake confirming in vivo interaction with Ehrlich tumor cells. Crotoxin had an antitumoral effect on Ehrlich tumor cells and this action is due, at least partially, to the specific interaction with low and high affinity binding sites. Low affinity binding sites correlate EGFR and high affinity binding sites still need identification. These results confirm Crotoxin as a template for radiopharmaceutical design for cancer diagnosis and as a tool for cancer studies, increasing its biotechnological potential. (author)

  7. Development of methodologies for internal exposure assessment due to the radiopharmaceutical {sup 18}FDG; Desenvolvimento de metodologias para avaliacao da exposicao ocupational interna devido ao radiofarmaco {sup 18}FDG

    Energy Technology Data Exchange (ETDEWEB)

    Lacerda, Isabelle Viviane Batista de

    2013-07-01

    The production of {sup 18}F has increased in the last decade. It is produced basically for the synthesis of {sup 18}F- fluorodeoxyglucose ({sup 18}FDG), the main radiopharmaceutical used in PET (Positron Emission Tomography) scans. The growth in the frequency of these tests resulted in rise of the number of occupationally exposed individuals (OEI) to the radionuclide {sup 18}F as {sup 18}FDG, increasing thereby the probability of its accidental incorporation. This study aimed to implement optimized techniques for assessing internal exposures of individuals occupationally exposed through both in vivo and in vitro bioassay methods during production and handling of {sup 18}FDG at the Divisao de Producao de Radiofarmacos (DIPRA), Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN). The in vivo monitoring was conducted at the Laboratorio de Dosimetria Interna, Divisao de Laboratorios Tecnico-Cientificos (DILAB). For this bioassay method, measurements were done with a 3x3' NaI(Tl) scintillation detector coupled to Genie 2000 software. The calibration of the system was performed with a brain phantom containing a standard liquid source of {sup 22}Na to simulate a contaminated individual. The calibration of the HPGe coaxial detector for in vitro monitoring was performed at the Laboratorio de Medidas de Atividade de Radionuclideos (DIPRA/CRCN-NE/CNEN) with a standard source of {sup 22}Na. Base on the calibration factors, it was possible to determine the minimum detectable activities (MDA) for the systems by using direct measurements and simulation of uncontaminated urine. Then, through the biokinetic models published by ICRP 106 and edited by the AIDE software (version 6.0), it was possible to estimate the minimum detectable effective dose (MDED), which evaluates the detection sensitivity of the techniques developed. The MDED was estimated for in vivo and in vitro measurements performed 2.4 hours after the occurrence of incorporation by ingestion, since this is the period of higher retention fraction of activity in the brain compartment and accumulated urine for {sup 18}FDG. The values obtained were compared to the recording level of 1 mSv, recommended by the IAEA. After validation of in vivo monitoring technique, measurements of the IOE from DIPRA began shortly after the end of production and quality control procedures. The in vitro internal monitoring was not performed since there was not voluntary participation to obtain the biological sample (urine). The techniques developed showed sufficient sensitivity for application to occupational internal monitoring. (author)

  8. Evaluation of element migration from food plastic packagings into simulated solutions using radiometric method; Avaliacao da migracao de elementos de embalagens plasticas de alimentos para solucoes simulantes pelo metodo radiometrico

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Eufemia Paez [Escola SENAI ' Fundacao Zerrenner' , Sao Paulo, SP (Brazil)]. E-mail: vlcastro@dialdata.com.br; Saiki, Mitiko [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)]. E-mail: mitiko@ipen.br; Wiebeck, Helio [Sao Paulo Univ., SP (Brazil). Escola Politecnica]. E-mail: hwiebeck@usp.br

    2005-07-01

    In the present study a radiometric method was established to determine the migration of elements from food plastic packagings to a simulated acetic acid solution. This radiometric method consisted of irradiating plastic samples with neutrons at IEA-R1 nuclear reactor for a period of 16 hours under a neutron flux of 10{sup 12} n cm{sup -2} s{sup -1} and, then to expose them to the element migration into a simulated solution. The radioactivity of the activated elements transferred to the solutions was measured to evaluate the migration. The experimental conditions were: time of exposure of 10 days at 40 deg C and 3% acetic acid solution was used as simulated solution, according to the procedure established by the National Agency of Sanitary Monitoring (ANVISA). The migration study was applied for plastic samples from soft drink and juice packagings. The results obtained indicated the migration of elements Co, Cr and Sb. The advantage of this methodology was no need to analyse the blank of simulantes, as well as the use of high purity simulated solutions. Besides, the method allows to evaluate the migration of the elements into the food content instead of simulated solution. The detention limits indicated high sensitivity of the radiometric method. (author)

  9. Evaluation of the modified nanoclay effect on the vulcanization of SBR through rheometric curve and DSC;Avaliacao do efeito de nanoargila modificada na vulcanizacao de SBR atraves da curva reometrica e DSC

    Energy Technology Data Exchange (ETDEWEB)

    Forte, Maria Madalena C.; Brito, Karin J.S., E-mail: mmcforte@ufrgs.b [Universidade Federal do Rio Grande do Sul (PPGEM/UFRGS), Porto Alegre, RS (Brazil). Programa de Pos-Graduacao em Engenharia Mecanica; Gheller Junior, Jordao [SENAI, Sao Leopoldo, RS (Brazil). Centro Tecnologico de Polimeros

    2009-07-01

    Rubber nanocomposites with nanoclays organically modified by quaternary ammonium salts may have the curing features modified significantly, since the salts may act on the rubber cure system. The aim of this work is to evaluate the influences of an organically modified montmorillonite (OMMT) on the curing reaction of an SBR (styrene butadiene rubber) with sulfur. The SBR/OMMT nanocomposites were prepared by co-coagulating SBR latex and Cloisite{sup R} 20A aqueous suspension at different nanoclay concentrations. The OMMT effect on the sulfur curing reaction was evaluated by the rheometric curve using a rheometer type RPA (Rubber Process Analyzer) and the heat of vulcanization (DELTAH{sub v}) using Differential Scanning Calorimetry (DSC). The evaluation of the clay nanolayers dispersion in the SBR matrix was accomplished by x-ray diffraction (XRD) analysis. (author)

  10. Sustainable charcoal use in iron and steel industry in Carajas region, Brazil; Avaliacao do potencial brasileiro de florestas plantadas na reducao da concentracao do carbono atmosferico: o caso do polo guseiro de Grande Carajas

    Energy Technology Data Exchange (ETDEWEB)

    Pinaud, Rodrigo Zambrotti [AJR Engenharia - Seguranca, Meio Ambiente e Saude Ltda. (Brazil)

    2004-07-01

    Concern about greenhouse gas emissions and global climate change has raised awareness that forest-management strategies have a large potential for storing and absorbing carbon from the atmosphere. Other measures under consideration include the use of renewable biomass as a substitute for fossil fuel use. This thesis shows the potential of charcoal from renewable Eucalyptus plantations for reducing CO{sub 2} emissions by replacing charcoal from the harvest of native forest in the iron and steel industry located at Carajas region, state of Para, Brazil. The results show that, if deforestation in the Carajas region were stopped and substituted by renewable forests for charcoal production, within a 21-year time horizon some 470.000 hectares of native Amazon forests could be preserved, avoiding the emission of some 2.67 x 10{sup 6} tC/yr to the atmosphere, which is 3.2% of the current carbon emissions from fossil fuel consumption in Brazil (82,4 x 10{sup 6} tC/yr) at a cost of 2,65-3,84 US$/tC. (author)

  11. Evaluation of the calibration uncertainty of gamma radiation monitors using a {sup 137}Cs source; Avaliacao da incerteza de calibracao de monitores de radiacao gama com uma fonte de {sup 137}Cs

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Elisabeth; Leite, Sandro Passos; David, Mariano Gazineu; Estrada, Carlos Frederico Alves; Almeida, Carlos Eduardo de, E-mail: beth.fernandes56@gmail.com [Universidade do Estado do Rio de Janeiro (UERJ/LCR), Rio de Janeiro (Brazil). Lab. de Ciencias Radiologicas

    2014-07-01

    This study shows all the relevant components to the calculation of the calibration uncertainty of gamma radiation area monitors performed by the Lab. Ciencias Radiologicas of UERJ . The uncertainty components will be related with their respective estimated values, details about the uncertainty components calculations of positioning and field homogeneity will be shown. There were obtained the values of 3,8 % and 5,8 % to the expanded uncertainty (k=2) for the dosimetry and for the area monitors calibration, respectively. (author)

  12. Radiation exposure evaluation of the professional working interventionist procedures in a hemodynamics service; Avaliacao da exposicao a radiacao dos profissionais que executam procedimentos intervencionistas em um servico de hemodinamica

    Energy Technology Data Exchange (ETDEWEB)

    Da Silva, Leonardo Peres

    2004-07-01

    An evaluation of the dose distribution received by all the workers involved on coronary angioplasty, arteriography, coronary angiography and mitral valvuloplasty procedures has been made in this work. For the measurements, LiF:Mg, Ti TLD(TLD 100) was used, located in seven different points on the worker's body: hands, knees, neck, forehead and thorax, inside and outside lead apron.) The measurements have been done for each hemo dynamical procedure, and the TLD calibrated in personal dose equivalent (H{sub p}(d)) operational quantity for 0,07 mm, 3 mm and 10 mm depth. Nurses and auxiliary doctors did not receive expressive dose values, indicating that the adopted radioprotection procedures seem to be appropriate and sufficient for them. However, the same is not true for the doctors direct in charge of the procedure. The results show the importance of the use of thyroid protections in these cases. This work discusses the main factors that cause occupational dose increase. From all interventionist hemo dynamical procedures analyzed, the dose values received by the doctors on coronary angioplasty procedures and coronary angiography were higher than the ones found on arteriography and mitral valvuloplasty. The higher dose values has been found for coronary angiography procedures in X-ray tools, that work with fluoroscopy on continuous mode and have been executed with brachial way, even in the eyes, hands, knees and thyroid, with or without shield. Multiplying these high dose values, measured in one procedure by the mean number of annual procedures made at the studied hospital by each doctor, the individual dose annual limits can be surpassed. Based on these estimations, some optimizations suggestions have been made and one discussion about the need of additional monitoring points is presented. Different algorithms have been used in order to estimate the effective dose, including a new proposal. The obtained results using the actual Radiodiagnostic Brazilian regulation underestimate the dose, in the major part of the measured cases. The proposed algorithm seem sto offer a better estimation for the occupational effective dose for Interventional Radiology. (author)

  13. Marginal microleakage evaluation in class V composite restorations of deciduous teeth prepared conventionally and using Er:YAG laser; Avaliacao da microinfiltracao marginal em cavidades classe V de dentes deciduos preparados com laser Er:YAG e alta rotacao

    Energy Technology Data Exchange (ETDEWEB)

    Pulga, Neusa Vieira Galvao

    2001-07-01

    The evaluation of marginal microleakage in class V restorations of deciduous teeth prepared using Er:laser and comparison to the ones observed when conventionally prepared, using two photopolimerizable materials, composite resin and glass ionomer cement, was the subject of this study. Twenty eight complete deciduous teeth were divided into four groups Group 1 (G1) prepared with high speed drill + composite resin; Group 2 (G2) prepared with high speed drill + glass ionomer cement; Group 3 (G3) prepared using Er:YAG laser (2.94 {mu}m), 300 mJ, 3 Hz, handpiece 2051, energy density 86 mJ/cm{sup 2} + composite resin; Group 4 (G4) prepared using Er:YAG laser (2.94 {mu}m), 300 mJ, 3 Hz, handpiece 2051, energy density 86 J / cm{sup 2} + glass ionomer cement. After the preparation and restoration the specimens where stored at 37 deg C for 24 hours, thermally stressed, immersed in 50% aqueous solution of silver nitrate for 24 hours while kept in the dark. The specimens were rinsed in water, soaked in photodeveloping solution and exposed to fluorescent light for 6 hours. After this process the samples were sectioned and observed by stereomicroscopy. For comparison the groups were divided into occlusive and cervical microleakage. The results were analysed under the Kruskal-Wallis test. For the occlusive microleakage the statistical significance was 5% among the groups and the average comparison showed higher microleakage for G1 (M=35.1) than for G2 (M=24.0) as well as compared to G3 (M=22.3). The other groups did not present statistical differences among them. For the cervical microleakage the Kruskal-Wallis test did not present any statistical difference. Comparing the occlusive and cervical microleakage data, for every group, using the Wilcoxon test, no statistical differences were observed. Concluding, this study showed the Er:YAG laser to be effective for class V restorations and to result in a smaller microleakage degree using the composite resin. These results indicate the viability of the Er:YAG laser for conservative restorations of deciduous teeth. (author)

  14. Evaluation of the temperature rise in pulp chamber during class V preparation with Er:YAG laser; Avaliacao da temperatura na camara pulpar durante preparo classe V com laser de Erbio:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Picinini, Leonardo Santos

    2001-07-01

    One of the major concerns regarding laser irradiation in the dentistry field is the overheating in dental tissue, specially pulpal tissue. A temperature raise over 5.5 deg C is considered to be harmful to its vitality. The current study evaluated the temperature increase in the pulp chamber, during class V preparation, performed with the laser Er:YAG in 36 bovine incisive extracted teeth. The samples were eroded on the outer side of the vestibular wall to obtain the dentinal thickness of 2.0 mm (group I), 1.0 mm (group II) and 0.5 mm (group III). Thermocouples were fixed to the inner part of the vestibular wall using thermal paste, through the palatine opening of the samples. Class V cavities were prepared in the vestibular side only in 1 mm{sup 2} thick dentins. Irradiation parameters used were: 500 mJ/10 Hz, 850 mJ/10 Hz and 1 000 mJ/10 Hz for all the groups. The results were processed by a microcomputer. This study showed that the temperature increased into the pulpal cavity reached around 3 deg C for the groups I (2,0 mm thick dentine) and II (1.0 mm thick dentine). In the group III (0.5 mm thick) temperature was around 5.5 deg C. Thus, the parameters used for cavity preparation, using Er:YAG laser, were safe in relation to the temperature raise for dentinal thickness of 1,0 and 2,0 mm; in 0.5 mm thick dentins, temperature increase reached 5.5 deg C and an appropriate correction in the laser parameters was necessary. (author)

  15. Assessment of the occupational exposure of the workers involved in the {sup 123}I production at the IEN/CNEN-RJ; Avaliacao da exposicao ocupacional dos trabalhadores envolvidos na producao de {sup 123}I no IEN

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Francisco de

    2005-07-01

    {sup 123}I is a gamma emitter used for diagnosis in Nuclear Medicine. Since 1998 it is produced in the Institute of Nuclear Energy (IEN) and supplied to the Clinics and Hospitals located in the city of Rio de Janeiro. The annual production is in the approximately of 0,74 TBq (20 Ci), which represents a risk of external and internal exposure to the workers involved in this activity. A survey of external doses in the period of 1994 to 2004 was carried out based on the individual registries available in the CONEXO Data Base operated by the Institute of Radiation Protection and Dosimetry (IRD). It was verified an increase of the external exposure associated to the production curve. However, the individual doses are all bellow the annual limits established by the regulatory board. On the other hand, the variation of doses among individuals involved in the same tasks suggests the possibility of optimization of procedures. Regarding internal exposure it was calculated a decision factor above 1mSv for the practice, which justifies the need for internal monitoring. An evaluation of the process based on the results of in vivo thyroid monitoring in the period of 2000 to 2004 was carried out to identify the steps which represent higher risk of internal exposure. The available data indicate that the laboratory of quality control is the critical step in terms of internal contamination. This conclusion can be justified by the high volatility of iodine which is manipulated in the form of a liquid open source during this step. With the aim of optimizing monitoring procedures for the control of occupationally exposed workers in the production of {sup 123}I, in vivo and in vitro bioassay methods were developed to identify and quantify internal contamination by such radionuclide, using the detection systems available at the Bioassay Laboratory and at the In Vivo Measurements Laboratory. The techniques developed present sensitivity compatible with the derived registry level associated to the committed effective dose equivalent of 1mSv. It was also established a methodology for the interpretation of bioassay data using the software AIDE. The methods developed in this work can be used to implement improvements in the radiation protection program of the IEN. It is suggested to increase the frequency of in vivo measurements and to include in vitro bioassay in the monitoring program, which will permit a better evaluation of the internal doses of the workers(author)

  16. Evaluation of the parametric neutron activation applied in the soil and sediments analysis using the IPR-R1 reactor; Avaliacao da ativacao neutronica parametrica na analise de solos e sedimentos, utilizando o reator IPR-R1

    Energy Technology Data Exchange (ETDEWEB)

    Franco, Milton B.; Vilhena Schayer Sabino, Claudia de; Kastner, Geraldo F. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil); Rossi, Eduardo H.M. [Instituto Peruano de Energia Nuclear, Lima (Peru)

    1997-10-01

    This work describes a mono standard method for multielement instrumental neutron activation analysis using sodium as comparator, and gamma spectrometry with a ultrapure Ge detector. The method was checked by analysing 16 elements presents in soils and sediments reference materials from IAEA and United States Geological Survey. (author). 2 refs., 2 tabs.

  17. Gamma radiation effect on tocopherol content in natural and industrialized products and sensory evaluation; Efeito da radiacao gama sobre o conteudo de tocoferois em produtos naturais e industrializados e avaliacao sensorial

    Energy Technology Data Exchange (ETDEWEB)

    Taipina, Magda Sinigallia

    2009-07-01

    Vitamin E content, the percentage of activity retention and the sensory characteristics were analyzed in samples of vitamin E rich foods: pecan nuts, whole grain cookies and a fortified powder formula irradiated with 1 and 3 kGy of {sup 60}Co gamma radiation. For the vitamin E determination (as -tocopherol equivalents) three different samples lots were employed using the colorimetric method standardized by the Instituto Adolfo Lutz of Sao Paulo. For sensory analysis, the Multiple Comparison or Control Difference Test was used for all products, comparing the irradiated samples to the non-irradiated controls and measuring the difference rate in total terms, concerning appearance, odor, texture and flavor, in a category scale of 9 points, ranging from 1 = no difference to 9 = extreme difference to the control. The experimental outline employed was that of randomized complete blocks design, in two consecutive sessions. The obtained data were submitted to variance analysis, ANOVA, and means comparison by Dunnett test, at 5% significance. The results show that there was no E vitamin loss in the pecan nuts, whole grain cookies and powder food samples, irradiated with 1 and 3 kGy doses. With regard to the sensory analysis, the 3 kGy gamma irradiation produced significant changes in the sensory properties of pecan nuts for the attributes: appearance, odor, texture and flavor. The 1 kGy dose did not cause a significant difference for these attributes. Concerning the sensory analysis of whole grain cookies and fortified powder food, significant differences were observed in all the irradiated products, although the difference grades were significantly low, compared to those of the non-irradiated samples, especially when 1 kGy dose was applied. (author)

  18. Time evaluation of discharges of suspension solids in the treated acid waters from the Osamu Utsumi - INB - Brazil; Avaliacao temporal das descargas de solidos em suspensao nas aguas acidas tratadas da mina Osamu Utsumi/INB

    Energy Technology Data Exchange (ETDEWEB)

    Maculan, Gabriella Giarola [Universidade Federal de Alfenas (UNIFAL), Pocos de caldas, MG (Brazil); Alberti, Heber Luiz Caponi, E-mail: heber@cnen.gov.br [Comissao Nacional de Energia Nuclear (LAPOC/CNEN), Pocos de Caldas, MG (Brazil). Laboratorio de Pocos de Caldas

    2011-07-01

    The present work presents only the flow and mass variations of particles on the the treated water at the points of interface with the environment. The region presents two very well established stations (dry and rainy), and the generated flows also presented oscillations as function of the hydrological year. The full knowledge of the hydrological fluxes involved in the Mine Acid Draining generation is essential for the elaboration of solutions aiming to minimize the environmental and costs impacts associated to the environmental passive generated by uranium mining

  19. Evaluation of the shield calculation adequacy of radiotherapy rooms through Monte Carlo Method and experimental measures; Avaliacao da adequacao do calculo de blindagens de salas de radioterapia atraves do metodo de Monte Carlos e medidas experimentais

    Energy Technology Data Exchange (ETDEWEB)

    Meireles, Ramiro Conceicao

    2016-07-01

    The shielding calculation methodology for radiotherapy services adopted in Brazil and in several countries is that described in publication 151 of the National Council on Radiation Protection and Measurements (NCRP 151). This methodology however, markedly employs several approaches that can impact both in the construction cost and in the radiological safety of the facility. Although this methodology is currently well established by the high level of use, some parameters employed in the calculation methodology did not undergo to a detailed assessment to evaluate the impact of the various approaches considered. In this work the MCNP5 Monte Carlo code was used with the purpose of evaluating the above mentioned approaches. TVLs values were obtained for photons in conventional concrete (2.35g / cm{sup 3}), considering the energies of 6, 10 and 25 MeV, respectively, first considering an isotropic radiation source impinging perpendicular to the barriers, and subsequently a lead head shielding emitting a shaped beam, in the format of a pyramid trunk. Primary barriers safety margins, taking in account the head shielding emitting photon beam pyramid-shaped in the energies of 6, 10, 15 and 18 MeV were assessed. A study was conducted considering the attenuation provided by the patient's body in the energies of 6,10, 15 and 18 MeV, leading to new attenuation factors. Experimental measurements were performed in a real radiotherapy room, in order to map the leakage radiation emitted by the accelerator head shielding and the results obtained were employed in the Monte Carlo simulation, as well as to validate the entire study. The study results indicate that the TVLs values provided by (NCRP, 2005) show discrepancies in comparison with the values obtained by simulation and that there may be some barriers that are calculated with insufficient thickness. Furthermore, the simulation results show that the additional safety margins considered when calculating the width of the primary barrier of radiotherapy rooms are conservative. They also show that the attenuation provided by the patient's body decreases with increased energy, with the highest attenuation being 0.54, for the energy of 6 MeV. (author)

  20. Evaluation of the protection induced by the immunization with radioiodinated yeast cells of Paracoccidioides brasiliensis in animal model; Avaliacao da protecao induzida pela imunizacao com leveduras radioatenuadas de Paracoccidioides brasiliensis em modelo animal

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Estefania Mara do Nascimento

    2007-07-01

    Paracoccidioides brasiliensis is fungus agent of paracoccidioidomycosis (PCM), a chronic systemic disease prevalent in Latin American. To date, there is no effective vaccine. The potential of gamma radiation for pathogens attenuation and vaccine development was explored in this work. In our laboratory were developed yeast cells of P. brasiliensis attenuated by gamma radiation, which lose the reproductive ability, while retaining the morphology, the synthesis and secretion of proteins, the oxidative metabolism and the expression of the antigens present in the native yeast. The aim of the present work was to evaluate the protection elicited by the immunization with this cells in animal model. The virulence attenuated was evaluated in BALB/c and Nude-Nude mice. The protector effect was evaluated in BALB/c mice groups immunized once or twice. Each group was divided in three sub groups that were challenge 30, 45 or 60 days after the immunization. The mice were sacrificed 30 and 90 days after challenge. The removed organs were used for colony forming units (CFUs) recover, histopathological analysis and cytokine determination. The sera were collected weekly to evaluate the IgG antibody titers and the IgG1 and IgG2a pattern in the course of infection. To evaluate the type of elicited immune response the cytokines IFN - {gamma}, TNF - {alpha}, IL - 10 and IL - 5 were determined by real time PCR. The radio attenuated yeast loses its virulence since fails in producing infection in BALB/c and Nude-Nude mice. No CFUs were recovered neither histological changes observed in the mice infected with the radio attenuated cells. The mice infected with the not irradiated P. brasiliensis showed a high level of antibody production while the infection with the radio attenuated yeast did not significantly change the antibody level. The mice infected with the radio attenuated yeast presented an increase in the IFN - {gamma} and TNF - {alpha} production and an inhibition of the IL-10 synthesis, indicating a stimulation of the cellular response. The protection assay performed with mice immunized once showed a significant reduction in the CFUs recovery evaluated 30 days after the challenge. However, when examined 90 days after the challenge the CFUs recovered from organs increased. Even so a significant degree of protection has been reached these results point that only one immunization was not enough to confer a long lasting protection, since some focus of the fungi were not eliminated. An efficient protection against highly infective forms of P. brasiliensis was developed in the mice group immunized twice. The immunization was able to reduce the initial infection and elicited a long lasting protection. A 99,5 % protection was obtained in the mice analyzed 90 days post challenge. At the same time the levels of IFN - {gamma} and TNF - {alpha} increased significantly while the IL-10 and IL - 5 decreased. When analyzed after 30 days, the mice had not developed a totally polarized pattern of Th1/Th2 response but, a trend to a Th1 response was evident after 90 days. The level of IgG increased in both immunized groups after the challenge. We concluded that the immunization with the radio attenuated yeast cells was able to elicit a long lasting protective immune response and these cells are valuable tool for protective immunity studies and vaccine research for PCM. (author)

  1. Evaluation of the efficiency of silicone polyether additives as foam inhibitor in crude oil; Avaliacao da eficiencia de aditivos a base de silicone polieter como inibidores de espuma em petroleo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    This work evaluates the chemical and physico-chemical properties of commercial anti-foam products based on silicone polyethers along with their efficiency in inhibiting foaming. The commercial surfactants were characterized by nuclear magnetic resonance (NMR) spectroscopy, size exclusion chromatography (SEC), determination of solubility in different solvents and measurement of the surface and interfacial tensions. A method to test the formation of foam in oil was used to mimic the operating conditions in gas-oil separators. The results show that the most polar additive was the most efficient in breaking up the foam. (author)

  2. Feasibility evaluation of using spent FCC catalyst for metals treatment from industrial waste; Avaliacao do potencial de recuperacao de niquel de catalisadores equilibrados (E-CAT) atraves da tecnica de remediacao eletrocinetica

    Energy Technology Data Exchange (ETDEWEB)

    Baptista, Adalberto; Ponte, Haroldo de Araujo [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil)

    2004-07-01

    The purpose of this work is to describe the feasibility evaluation using FCC catalyst for treatment from industrial wastes increasing the life time of the spent catalysts and reducing the environmental impact. Evaluated the reutilization of catalyst in process recovery of nickel adsorbed. The technique used was the Electrokinetic Remediation. This technique is based in application of a direct current of low intensity or low potential between the electrodes located in soil. The pollutants are mobilized how loaded species or particles. It used a electrokinetic reactor with approximated volume of 1200 cm{sup 3}, where the residue is placed. In your extremity are adapted two cameras of acrylic, being one anodic, with steel inox 304 electrode, and other cathodic, with lead electrode. In anodic camera, it was injected, with aid a bomb, a solution of sulfuric acid, which work as electrolyte, to a flow rate of 20 ml/h. Was evaluated the desorption of Nickel in the equilibrium catalyst submitting a variation of the conditions of the concentration and potential. (author)

  3. High-resolution computed tomography versus chest radiography in the diagnosis of interstitial lung disease in systemic sclerosis; Avaliacao da tomografia de alta resolucao versus radiografia de torax na doenca intersticial pulmonar na esclerose sistemica

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Ana Beatriz Cordeiro de; Calderaro, Debora; Moreira, Caio [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Hospital das Clinicas. Servico de Reumatologia; Guimaraes, Silvana Mangeon Meirelles [Gerais Univ., Belo Horizonte, MG (Brazil). Hospital das Clinicas. Secao de Tomografia Computadorizada; Tavares Junior, Wilson Campos; Leao Filho, Hilton Muniz; Andrade, Diego Correa de [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Hospital das Clinicas. Servico de Radiologia e Diagnostico por Imagem]. E-mail: wilsontavaresjrmd@yahho.fr; Ferreira, Cid Sergio; Vieira, Jose Nelson Mendes [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Faculdade de Medicina. Dept. de Radiologia

    2005-04-01

    Objective: To compare the accuracy of high-resolution computed tomography (HRCT) with chest radiography in the diagnosis of interstitial lung disease in systemic sclerosis (SSc). Materials And Methods: HRCT scans and chest radiographs in postero-anterior and lateral views were performed in 34 patients with systemic sclerosis, according to the American College of Rheumatology preliminary criteria for the diagnosis of SSc. The prevalence of radiological findings suggestive of interstitial lung disease in SSc seen on both imaging methods was compared. Results: Interstitial disease was observed on HRCT images of 31 patients (91%) and in the chest radiographs of 16 patients (47%). The most frequent findings observed on HRCT were septal lines (74%), honeycombing (56%) and parenchymal bands (26%). Chest radiographs showed reticular areas of attenuation in 11 patients (32%) and parenchymal distortion in 12% of the patients. In 18 patients (53%) with normal chest radiographs HRCT showed septal lines in 55%, ground glass in 44%, honeycombing in 38.5% and cysts in 33%. Conclusion: HRCT is more sensitive than chest radiography in the evaluation of incipient interstitial lung involvement in patients with SSc and can provide a justification for immunosuppressive therapy in patients with early disease. (author)

  4. Chemical and physicochemical characterization of vermicompost from bovine manure and evaluation of competitive adsorption of cadmium and lead; Caracterizacao quimica e fisico-quimica de vermicomposto de esterco bovino e avaliacao da adsorcao competitiva por cadmio e chumbo

    Energy Technology Data Exchange (ETDEWEB)

    Lamim, Soraida Sozzi Miguel [Juiz de Fora Univ., MG (Brazil). Dept. de Quimica; Jordao, Claudio Pereira; Brune, Walter; Pereira, Jose Luis [Vicosa Univ., MG (Brazil). Dept. de Quimica

    1996-09-01

    The chemical and physicochemical characterization of vermicompost from bovine manure has been studied. It was examined the pH and cation exchangeable capacity (CTC), moistness, ash, organic carbon, total nitrogen, lignin, cellulose and metal concentrations, among other characteristics. The vermicompost was then applied to the retention and competition of metal pollutants (Cd and Pb) from metal nitrate solutions. The retention was affected by both the pH and time of adsorption, while the competitive character of these metals for the substrate was not relevant to each pH examined. (author) 46 refs., 4 figs., 7 tabs.

  5. Effects of the low-intensity red laser radiation on the fluoride uptake in enamel. A clinical trial; Avaliacao dos efeitos da radiacao laser de emissao vermelha em baixa intensidade na incorporacao de fluor no esmalte. Estudo clinico

    Energy Technology Data Exchange (ETDEWEB)

    Nakasone, Regina Keiko

    2004-07-01

    Fluoride has been the most important preventive method on development of the caries. This in vivo study evaluated the effects of low-intensity red laser radiation on the fluoride uptake in enamel. Ten healthy participants were recruited for this study. The two maxillary central incisors of each volunteer to be biopsied were used and divided into 4 groups: group G{sub C} (control, which was untreated; group G{sub F} (fluoride), which received topical acidulated phosphate fluoride (APF) 1,23% treatment for 4 minutes; group G{sub LF} (laser + fluoride), which was irradiated with a low-intensity diode laser ({lambda}= 660 nm and dose= 6 J/cm{sup 2}) with APF application after irradiation and group G{sub FL} (fluoride + laser), which received APF before irradiation using the same parameters as G{sub LF}. The determination of fluoride was performed using a fluoride ion electrode after an acid-etch enamel biopsy. The results show a significant increase of the fluoride uptake in enamel for groups G{sub F}, G{sub LF} and G{sub FL} when compared to control group. Although a percentage increase of 57% was observed for G{sub LF} with respect to G{sub F}, there were no statistical differences among treated groups. These findings suggest that low-intensity laser radiation used before APF could be employed in the clinical practice to prevent dental caries. (author)

  6. Offshore degasser vessel capacity versus performance qualitative evaluation for waste water treatment; Avaliacao qualitativa da capacidade versus desempenho de vaso degaseificador em plataformas offshore visando tratamento de agua produzida para descarte

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Marcel V.; Pereira Junior, Oswaldo de A. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Silva, Daniel B.V.F. [Engineering Simulation and Scientific Software (ESSS), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Present work shows a qualitative evaluation of an offshore degasser vessel aiming the improvement of the water processing plant capacity. For such computational fluid dynamics (CFD) allowed the analysis of the flow pattern inside the vessel for different operational flow rates and internal geometries. This vessel is responsible for the process of water final polishing to be disposed into the sea. Original capacity of the vessel is 13.308 m{sup 3}/d, but after some changes in the outlet section, the processing capacity increased to 24.000 m{sup 3}/d, without changing its separation efficiency. However, as newer production predictions state that the new processing capacity should be increased to 26.000 m{sup 3}/d, there is some uncertainty on how would be this vessel behaviour, given the new operational condition. CFD analysis will be used to evaluate the flow characteristics inside the vessel (residence time distribution), therefore providing information on the separation performance for each one of the specified conditions and internal modifications. (author)

  7. Evaluation of gains of energy efficiency in illumination with the use of proposed rulemaking labeling for buildings; Avaliacao dos ganhos em eficiencia energetica em iluminacao com o uso da proposta de regulamentacao de etiquetagem para edificios

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Guilherme Augusto Marques; Saidel, Marco Antonio [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica], Emails: guilherme.araujo2@poli.usp.br, saidel@usp.br

    2009-07-01

    This article aims to examine the gains in energy efficiency through the classification levels, assigned to the installation of lighting systems with the use of the proposed regulations for voluntary labeling of the level of energy efficiency in commercial buildings, and public services. Were produced three different simulations: the first, considering a survey of data in an existing building which is hosting an administrative part of the public power, composed of 275 dependences. The second and third simulations deal with the application in a lighting project in the same enterprise, in two different luminaries (composed of optical systems with and without fins, respectively). From these activities that guide the direct application of the methodology for preparation of projects have been established comparisons between the results and made comments on the rates of illuminance, the levels of efficiency and the use of luminaries. (author)

  8. Synthesis and characterization of ZSM-5 and calcined kaolin evaluation using the content of structure-directing; Sintese e caracterizacao da zeolita ZSM-5 utilizando caulim calcinado e avaliacao do teor de direcionador de estrutura

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, J.J.; Silva, V.J. da; Rodrigues, M.G.F., E-mail: jocielys@yahoo.com.br [Universidade Federal de Campina Grande (LABNOV/UAEQ/UFCG), PB (Brazil). Unidade Academica de Engenharia Quimica. Lab. de Desenvolvimento de Novos Materiais

    2012-07-01

    This study aims to evaluate the effect of the structure-directing content, tetrapropylammonium bromide, on the structural and morphological characteristics of ZSM-5 zeolite obtained using calcined kaolin as silicon and aluminum. The samples were characterized by XRD, EDX, SEM and Physics Adsorption N{sub 2}. Trough X ray diffraction patterns was possible to observed the formation of the structure of ZSM-5 with intense peaks and well-defined characteristic of crystalline. The micrographs showed that the samples consist of agglomerates and/or aggregates of particles characteristic of the MFI structure typical of ZSM-5 zeolite. And through the adsorption-desorption isotherms physical N2 was possible to observe that the samples show hysteresis type I typical of microporous materials with specific surface areas of 218 and 222 m{sup 2}/g. Therefore, the use of calcined kaolin to obtain ZSM-5 zeolite was effective. (author)

  9. Evaluation of the toxicity of the use of fenantrenoquinone associated to irradiation in the degrading of oil in marine spills; Avaliacao da toxicidade do uso de fenantrenoquinone associada a irradiacao na degradacao de oleo em derrames marinhos

    Energy Technology Data Exchange (ETDEWEB)

    Teixeira, Claudia Maria Luz Lapa [Universidade Federal, Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Biofisica. Dept. de Radiobiologia e Biofisica Ambiental; Nicodem, David Ernest [Universidade Federal, Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Quimica. Lab. de Fotoquimica; Lagembach, Tomaz [Universidade Federal, Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Quimica. Lab. de Microbiologia do Solo

    1998-06-01

    A system to study the photodegradation of hydrocarbon sensitized by fenantrenoquinone (FQ) has been developed with the purpose of evaluating its use in the treatment of oil spills in the sea, as far as its toxicity is concerned and that of its photoproducts. The model-hydrocarbon used was the hexadecane (HD). The CL{sub 50} of FQ has also been calculated for the organisms Artemia salina and Brachydanio rerio, and the CE{sub 50} for the Photobacterium phosphoreum. The FQ photoproducts have shown to be much less toxic than FQ. It is interesting to note that the sun irradiation has reduced a lot the toxic effect of FQ. An evaluation of the advantages and restrictions of the use of FQ in the treatment of marine oil spills is presented herein. (author)

  10. Evaluation of toxicity to the biological treatment and removal of recalcitrant organic compounds from oil refineries wastewaters; Avaliacao da toxicidade ao tratamento biologico e remocao de compostos organicos recalcitrantes existentes em efluentes de refinarias de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Barros Junior, Laerte M.; Macedo, Gorete R.; Bezerra, Marcio S.; Pereira, Franklin M.S. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Dept. de Engenharia Quimica; Schmidell, Willibaldo [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil)

    2004-07-01

    Oil industry waste water usually contains recalcitrant chemical compounds, like phenol, benzene, toluene, xylene, naphthalene and acenaphthene. The respirometry, determination of respiration rate of an active biomass, is an adequate methodology for quantification of aerobic activity biological. This study aims evaluate the inhibition effect of phenol in the oxidation capacity of an industrial sludge. This work also intends to study the phenol removal through biological and photochemical-biological processes. The respirometry was carried out with synthetic solution, using sludge from an oil processing industry. The phenol degradation experiments were carried out in an activated sludge unit and in a photochemical reactor. This work suggests the potential of photochemical-biological treatment use, in relation to the biological process with a no-acclimated sludge, in the removal of refractory organic compounds from oil industry wastewaters. The characterization of biomass using the respirometry methodology showed which is a useful tool in evaluation of phenol toxicity to biological treatment. (author)

  11. Evaluation of Portland cement from X-ray diffraction associated with cluster analysis; Avaliacao de cimento Portland a partir da difracao de raios X associada a analise por agrupamento

    Energy Technology Data Exchange (ETDEWEB)

    Gobbo, Luciano de Andrade, E-mail: luciano.gobbo@panalytical.com [Panalytical Brasil, Sao Paulo, SP (Brazil); Montanheiro, Tarcisio Jose, E-mail: tarcisio.montanheiro@gmail.com [Instituto Geologico, Secretaria de Estado do Meio Ambiente, Sao Paulo, SP (Brazil); Montanheiro, Filipe, E-mail: flpmontanheiro@gmail.com [Universidade Estadual Paulista (LEBAC/UNESP), Rio Claro, SP (Brazil). Departamento de Geologia Aplicada. Lab. de Estudos de Bacias; Sant' Agostino, Lilia Mascarenhas, E-mail: agostino@usp.br [Universidade de Sao Paulo (USP), SP (Brazil). Instituto de Geociencias. Departamento de Geologia Sedimentar e Ambiental

    2013-12-15

    The Brazilian cement industry produced 64 million tons of cement in 2012, with noteworthy contribution of CP-II (slag), CP-III (blast furnace) and CP-IV (pozzolanic) cements. The industrial pole comprises about 80 factories that utilize raw materials of different origins and chemical compositions that require enhanced analytical technologies to optimize production in order to gain space in the growing consumer market in Brazil. This paper assesses the sensitivity of mineralogical analysis by X-ray diffraction associated with cluster analysis to distinguish different kinds of cements with different additions. This technique can be applied, for example, in the prospection of different types of limestone (calcitic, dolomitic and siliceous) as well as in the qualification of different clinkers. The cluster analysis does not require any specific knowledge of the mineralogical composition of the diffractograms to be clustered; rather, it is based on their similarity. The materials tested for addition have different origins: fly ashes from different power stations from South Brazil and slag from different steel plants in the Southeast. Cement with different additions of limestone and white Portland cement were also used. The Rietveld method of qualitative and quantitative analysis was used for measuring the results generated by the cluster analysis technique. (author)

  12. Evaluation of the environmental conditioning factors in the perspective of expansion of ethanol production in Brazil; Avaliacao dos condicionantes ambientais na perspectiva de expansao da producao de etanol no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Conceicao Elaine Cardoso

    2010-03-15

    Various countries have studied the possibility of adding ethanol to gasoline or using pure fuel ethanol as an alternative to petroleum derivatives. Brazil occupies a leading position in this scenario because with its National Alcohol Program (Programa Nacional do Alcool - PROALCOOL), created in 1975, it became the pioneer in setting up a biofuels program. Since then it has accumulated experience and gained mastery of the technology to produce ethanol from sugarcane. Hence there is a strong expectation that the country can become the world's main ethanol exporter. This thesis examines the main environmental impacts associated with the ethanol productive chain, which are relevant conditioning factors for the expansion of this industry in Brazil. The study describes the evolution of PROALCOOL and the overview of current structure of the brazilian sugar-alcohol sector, identifies technologies and environmental management policies, and presents the perspective of expansion of ethanol production. Thus, the study undertakes an extensive review of the literature and examines to what extent the creation and implementation of public and private environmental management policies (legal restrictions and market instruments, respectively) interfere with the expansion of these productive activities. (author)

  13. Firewood and wood-shaving use energy assessment for energy generation in sericulture agroindustry; Avaliacao energetica do uso da lenha e cavaco de madeira para producao de energia em agroindustria seropedica

    Energy Technology Data Exchange (ETDEWEB)

    Nascimento, Mario Donizeti do [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Pos-Graduacao em Agronomia], E-mail: mariovmr@fca.unesp.br; Biaggioni, Marco Antonio Martin [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Engenharia Rural], E-mail: biaggioni@fca.unesp.br

    2010-07-01

    The aim of this paper was to perform an energy assessment of firewood and wood-shaving use for energy generation in sericulture agroindustry boilers. In this research, we used a boiler from a silk spinning factory located in the city of Duartina, Sao Paulo, Brazil, that currently uses eucalyptus firewood as fuel to generate water vapour used in silk fiber production. In the studied fuels utilization system energy consumption structure development, we considered energy input in Megajoule (MJ) by type, source and form involved in several firewood use technical itinerary operations, as well as in wood-shaving use technical itinerary operations. From these fuels utilization built structure, we performed a firewood- and wood-shaving-generated energy input comparative analysis, in Megajoule/hour (MJ.h{sup -1}), to produce 2.968,80 kg.h{sup -1} of vapour, which is the boiler average production, during the following years: 2004, 2005, and 2006. The energy analysis results revealed that to replace eucalyptus firewood with wood-shaving is something possible in the boiler, reducing total energy consumption approximately by 21%. (author)

  14. Environmental assessment on PETROBRAS pipeline projects: case study of Cacimbas-Catu gas pipeline; Engenharia de avaliacao ambiental no processo de concepcao de projetos de dutos da PETROBRAS - estudo de caso do Gasoduto Cacimbas (ES) - Catu (BA)

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Wilson Jose de; Pereira Junior, Edson R.; Fonseca, Renata A. Almeida; Rocha, Marcelo de Andrade; Soares, Luis Felipe [PETROBRAS Engenharia, RJ (Brazil). Engenharia de Avaliacao Ambiental

    2005-07-01

    The environmental assessment process is one of the most important phases in the implementation of pipeline projects. For that reason, new technologies and work procedures are used to perform the environmental assessment of areas where pipeways will be implemented. Since the quality of environmental assessment studies influences the social acceptance of projects and, consequently, the time required to obtain the environmental permits, PETROBRAS (Engenharia/IETEG/ETEG/EAMB) applies advanced technological tools to acquire remote sensing data (conventional / digital aero-surveys and satellite images), as well as software for digital image processing and integration and spatial analysis of information. Information about the physical, biological and socioeconomic environments are further verified and complemented through field trips using helicopters. This process makes it possible to identify environmentally favorable corridors to develop guidelines for the implementation of the pipeline, assuring its environmental feasibility, and produces relevant data to support the Environmental Impact Assessment Study, the Environmental Impact Assessment Report and the Risk Analysis Study. As an example of the application of this methodology, this paper presents results of the assessment of the Cacimbas / Catu gas pipeline, which is currently being permitted and is planned to be implemented in areas of high environmental complexity. (author)

  15. Evaluation of the energy dependence of ionization chambers pencil type calibrated beam tomography standards; Avaliacao da dependencia energetica de camaras de ionizacao do tipo lapis calibradas em feixes padroes de tomografia

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Ladyjane Pereira; Potiens, Maria da Penha A., E-mail: lpfontes@ipen.br [Instituto de Pesquisas Energeticas e Nucleres (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    The Instrument Calibration Laboratory of IPEN (LCI - IPEN) performs calibrations of pencil-type ionization chambers (IC) used in measures of dosimetric survey on clinical systems of Computed Tomography (CT). Many users make mistakes when using a calibrated ionization chamber in their CT dosimetry systems. In this work a methodology for determination of factors of correction for quality (Kq) through the calibration curve that is specific for each ionization chamber was established. Furthermore, it was possible to demonstrate the energy dependence on an pencil-type Ionization Chamber(IC) calibrated at the LCI - IPEN. (author)

  16. Synthesis of polyisoprene and its evaluation as reducer of flow loss temperature of paraffinic drilling fluid; Sintese de poliisopreno e sua avaliacao como redutor da temperatura de perda de fluidez de fluido de perfuracao parafinico

    Energy Technology Data Exchange (ETDEWEB)

    Palermo, Luiz Carlos; Pires, Renata V.; Sant' Anna, Monica; Cardoso, Jaciene J.F.; Lucas, Elizabete F. [Universidade Federal do Rio de Janeiro/ Instituto de Macromoleculas/ Laboratorio de Macromoleculas e Coloides na Industria de Petroleo, Rio de Janeiro, RJ (Brazil)], e-mail: luizpalermo@ima.ufrj.br

    2011-07-01

    N-paraffin fluids are widely used in drilling oil wells. However, under low temperature, such as those found in deep water, they lose their ability to flow due to solidification of paraffins. In order to keep the fluid flowing, isoparaffins are added to fluids. Nevertheless, the safety of the process is affected, due to its low flash point, especially during the storage in platforms offshore. This paper aims to obtain polymeric additives that can reduce the flow loss temperature of the n-paraffin fluid, replacing the isoparaffin, without affecting its rheological properties. So, oligomers/polymers based on isoprene were synthesized and the rheological behavior of the products and their mixtures with n-paraffin, as a function of decreasing temperature, was evaluated. Products from chemical degradation of natural rubber (NR) were also evaluated. The results showed that samples presenting relatively low molar mass, about 5,000 g/mol, exhibited good performance. When obtaining product by polymerization, a chain transfer agent must be used. (author)

  17. Evaluation of composition of natural gas used as a fuel in pickups in motor racing; Avaliacao da composicao do gas natural utilizado como combustivel em pickups em corridas automobilisticas

    Energy Technology Data Exchange (ETDEWEB)

    Faria, Fatima D.; Silva, Haroldo F. da; Leal, Glaucia P.; Freire, Luiz Gustavo de M. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Balthar, Alcides R.; Bayer, Marcilio de M. [Centro de Tecnologias do Gas (CTGAS), Natal, RN (Brazil)

    2004-07-01

    Concerned with the quality of their products, PETROBRAS could not have a different attitude in relation to the natural gas vehicular (NGV). For this, the compositions of natural gases used in the pickup of PETROBRAS Pickup Racing have been determined. In the tests accomplished in the race tracks, after the trainings and after the races, a portable Micro gas chromatograph, model Agilent 3000A have been used. This equipment have tree thermal conductivity detectors, columns appropriate to determine the components of the natural gas (N{sub 2}, CO{sub 2}, CH{sub 4}, C{sub 2}H{sub 6}, C{sub 3}H{sub 8}, C{sub 4}H{sub 10} and C{sub 5+}, at 70 deg C) and also the presence of O{sub 2}, at 110 deg C. The gas chromatograph is controlled by a laptop that calculates the final composition of the NGV and the calorific value. The tests proved that the composition of NGV was similar of a standard natural gas. This proved that the performance of the pickups, in the race, is related to the quality of the natural gas used. This project was developed by PETROBRAS/CENPES, CTGAS and RedeGasEnergia (author)

  18. Assessment of potential Rio Grande do Norte, Brazil, clays when subjected to high rates of heating; Avaliacao da potencialidade de argilas do Rio Grande do Norte quando submetidas a elevadas taxas de aquecimento

    Energy Technology Data Exchange (ETDEWEB)

    Filgueira, R.L.; Pereira, L.M.; Dutra, R.P.S.; Nascimento, R.M. [Universidade Federal do Rio Grande do Norte (DEMat/CT/UFRN), Natal, RN (Brazil). Centro de Tecnologia. Dept. de Engenharia de Materiais

    2009-07-01

    In this work we study three clays of the state of Rio Grande do Norte, Brazil, to evaluate the potential them when subjected to high rates of heating. The samples were formed by pressing and subject to rates of 5 deg C / min, 10 deg C / min and 15 deg C / min, with temperature of 950 deg C. This study determined the technological properties of the samples. The mineralogical composition was identified by X-ray diffraction. The chemical composition was determined by Xray fluorescence. The Atterberg limits, were used to classify the samples on the plasticity. Were also performed: dilatometry, size analysis and scanning electron microscopy. The examination of the processing variables and the intrinsic characteristics of each material indicates that the RX clay showed the best results for the manufacture of blocks and tiles. The techniques used in this study were efficient and the initial objectives were achieved. (author)

  19. Evaluation of the microstructure of waterborne poly(urethane-urea)s nanocomposites with hydrophilic clay (NWPUU); Avaliacao da microestrutura de nanocompositos de poli(uretano-ureia)s e argila hidrofilica obtidos como dispersoes aquosas (NWPUU)

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, Gisele dos S.; Delpech, Marcia C.; Reis, Rodrigo A. dos; Pereira, Alexandre Z.I; Coelho, Aline B., E-mail: mcd@uerj.br [Universidade do Estado do Rio do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil)

    2013-07-01

    Waterborne poly(urethane-urea)s (WPUU) and respective nanocomposites based on hydrophilic clay (NWPUU) generally show segregation between hard and soft domains, in a greater or lesser extent, which directly influences the stability of the dispersion and affect the final properties of the material. Simple characterization techniques, such as infrared spectroscopy (FTIR) and X ray diffraction (XRD), employed in this study, can generate information about the microstructure and phase miscibility, using small amounts of material. The evaluation of the results obtained from the techniques showed that increments in rigid domains content and in the amount of internal emulsifier, as well as the presence of clay, decreased the size of the crystallites (crystallinity of the soft segments). (author)'.

  20. Resistance evaluation of distillation tower welded metal plate linings to corrosion caused by heavy crude oil; Avaliacao da resistencia a corrosao causada por petroleo pesado em chapas soldadas utilizadas em 'linings' de torres de destilacao

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Cleiton Carvalho; Farias, Jesualdo Pereira [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Engenharia Metalurgica e de Materiais], e-mail: cleitonufc@yahoo.com.br, e-mail: jpf@secrel.com.br; Sant' Ana, Hosilberto Batista de [' Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Engenharia Quimica], e-mail: hbs@ufc.br

    2008-04-15

    This study evaluated the microstructures and the resistance of AISI 316L, 410S and 444 stainless steel welded joints to heavy crude oil corrosion, using the AWS E309MoL-16 electrode. The above mentioned stainless steel plates were welded applying three energy levels (6; 9 and 12kJ/cm). Experimental sample forms were obtained from the welded plates, which were thermally treated at 200 and 300 deg C and immersed (annealed) in heavy crude oil. The techniques of optical microscopy (OM), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) were employed to make the microstructure evaluation, in addition to the surface characterization and the corrosion product identification. It was concluded that the welding thermal cycle is sufficient to cause metallurgic alterations in the region of the heat-affected zone (HAZ), making the region more susceptible to corrosion. It was also observed that the rate of corrosion varied according to the welding parameters applied. (author)

  1. Metals on urban soils: evaluation of the concentration on soils adjacent to the Pinheiros river border avenues; Metais em solos urbanos: avaliacao da concentracao em solos adjacentes a marginal do rio Pinheiros, SP

    Energy Technology Data Exchange (ETDEWEB)

    Nammoura Neto, Georges M.; Figueiredo, Ana M.G.; Ribeiro, Andreza P.; Silva, Natalia C.; Ticianelli, Regina B.; Camargo, Sonia P., E-mail: anamaria@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao Neutronica

    2009-07-01

    The samples for this study were collected in seven points with approximately 3 km of distance, with a depth of 5 cm and prepared in laboratory. Also, with the samples three BEN (IWG-GIT), GS-N (IWG-GIT) and Soil-7 (IAEA) reference standards were analysed,for quality control of the results. Using neutron activation analysis it was possible to determine the concentrations of these heavy metal, particularly the zinc and the barium, and in these study, these two metals have their concentrations rose surpassing the intervention limits, according to the stipulated by the Companhia de Tecnologia de Saneamento Ambiental (CETESB), which can be connected to vehicle emissions and the use of pesticides and herbicides as long as his extension, being considered a risk for the human heath through the resuspension the dust of these contaminated soil

  2. Transitoriedade ou o desterro da certeza

    Directory of Open Access Journals (Sweden)

    Paulo José Carvalho da Silva

    2012-12-01

    Full Text Available O tema da transitoriedade era lugar-comum da medicina da alma da primeira modernidade. Este artigo analisa algumas dessas fontes para mostrar como a dor do tempo e os males da alma atinentes eram relacionados a um modo de encarar a fugacidade do tempo e a fragilidade da vida. Dá-se destaque, sobretudo, às construções em torno da condição humana enquanto desterro da certeza.

  3. O Tema da Cidadania

    Directory of Open Access Journals (Sweden)

    Adriano Moreira

    2009-11-01

    Full Text Available Neste artigo tentaremos evidenciar a natureza pelo menos tripartida da cidadania que responde ao incontroladoglobalismo: uma que se confunde com os direitos humanos, exigentes querem seja o Estado o seu interlocutor,quer não exista tal interlocutor; outra que se insere na fenomenologia dos grandes espaços em formação, de que aUnião Europeia é exemplo, e a que o projecto da Constituição Europeia, agora em recolhimento de meditação, jáoferece o apoio de uma definição específica de direitos; e finalmente, a cidadania que diz respeito à relação com oEstado soberano em crise de redefinição, sobretudo, pelo que nos interessa, no espaço europeu.

  4. Fisiopatologia da asma grave

    OpenAIRE

    Todo-Bom, Ana; Mota-Pinto, Anabela

    2006-01-01

    Não tem resumo. Transcreve-se o primeiro parágrafo: A história natural da asma e os condicionalismos de uma evolução para formas moderadas ou graves não está completamente estabelecida. Contudo, quer os factores genéticos quer os factores ambientais, serão determinantes na fisiopatologia e no prognóstico da doença. A asma é, por definição, uma doença inflamatória crónica das vias aéreas caracterizada por uma obstrução brônquica generalizada mas variável que é, pelo menos parcialmente, reve...

  5. [da Vinci surgical system].

    Science.gov (United States)

    Watanabe, Gou; Ishikawa, Norihiro

    2014-07-01

    The da Vinci surgical system was developed by Intuitive Surgical Inc. in the United States as an endoscopic surgical device to assist remote control surgeries. In 1998, the Da Vinci system was first used for cardiothoracic procedures. Currently a combination of robot-assisted internal thoracic artery harvest together with coronary artery bypass grafting (CABG) through a mini-incision (ThoraCAB) or totally endoscopic procedures including anastomoses under robotic assistance (TECAB) are being conducted for the treatment of coronary artery diseases. With the recent advances in catheter interventions, hybrid procedures combining catheter intervention with ThoraCAB or TECAB are anticipated in the future.On the other hand, with the decrease in number of coronary artery bypass surgeries, the share of valvular surgeries is expected to increase in the future. Among them, mitral valvuloplasty for mitral regurgitation is anticipated to be conducted mainly by low-invasive procedures, represented by minimally invasive cardiac surgery( MICS) and robot-assisted surgery. Apart from the intrinsic good surgical view, robotic-assisted systems offer additional advantages of the availability of an amplified view and the easy to observe the mitral valve in the physiological position. Thus, robotic surgical surgeries that make complicated procedures easier are expected to accomplish further developments in the future. Furthermore, while the number of surgeries for atrial septal defects has decreased dramatically following the widespread use of Amplatzer septal occluder, robotic surgery may become a good indication for cases in which the Amplatzer device is not indicated. In Japan, clinical trial of the da Vinci robotic system for heart surgeries has been completed. Statutory approval of the da Vinci system for mitral regurgitation and atrial septal defects is anticipated in the next few years.

  6. A representação social dos enfermeiros sobre pacientes críticos no contexto da clínica médica

    Directory of Open Access Journals (Sweden)

    Taísa Diva Gomes Felippe

    2012-12-01

    Full Text Available Introdução: Este estudo teve como objeto a representação social dos enfermeiros de clínica médica sobre a assistência ao paciente crítico fora da terapia intensiva e como objetivos identificar as representações sociais dos enfermeiros no atendimento ao paciente crítico na clínica médica e discutir as repercussões dessas representações no cotidiano de trabalho. Materiais e Métodos: Estudo qualitativo desenvolvido à luz da Teoria das Representações Sociais, em um serviço de clínica médica de um Hospital Universitário no Rio de Janeiro. Foram abordados 30 enfermeiros atuantes na clínica médica, através de entrevistas semi-estruturadas que foram analisadas através de análise de conteúdo. Resultados: Tendo como resultado 297 unidades de registro, distribuídas em 07 temas agregados em 03 categorias: A presença do paciente crítico na clínica médica, tecnologias do cuidado e sentimentos ao prestar assistência ao paciente crítico. Discusão e Conclusões: Concluise que a representação social deste grupo caracterizase pela falta de recursos humanos e materiais e de planta física adequada ao atendimento ao cliente crítico na clinica médica. (Rev Cuid 2012; 3(3:363-70.Palavras chave: Medicina Clínica, Tecnologia Biomédica, Terapia Intensiva. (Fonte: DeCS BIREME.

  7. O Cognitivismo e o problema da Cientificidade da Psicologia

    OpenAIRE

    Arja Castañon, Gustavo

    2010-01-01

    Este artigo trata do problema do estatuto científico da psicologia. Seu objetivo é avaliar em que medida o cognitivismo solucionou objeções históricas levantadas contra a possibilidade de uma psicologia científica. Com base em avaliação de textos clássicos da “revolução cognitiva”, se conclui que esta abordagem apresentou um projeto filosófico de ciência psicológica que resolveu a maior parte dos problemas ontológicos e epistemológicos endêmicos da disciplina, como o da natureza inquantificáv...

  8. O paradoxo da legitimidade a partir da legalidade segundo Habermas

    Directory of Open Access Journals (Sweden)

    Aylton Barbieri Durão

    2010-12-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2008v7n2p233A autonomia jurídica surge da conexão co-originária entre a autnomia privada dos indivíduos e a autonomia pública dos cidadãos, a qual, contudo, ficou velada ao longo da história da filosofia política e jurídica por causa da herança metafísica do direito natural racional e da filosofia da consciência que gerou uma relação de competição entre os direitos humanos e a vontade soberana do povo. Por causa desta conexão entre a autonomia privada e pública, o processo democrática de produção de normas jurídicas apresenta um aparente paradoxo porque os cidadãos tanto podem aprovar as normas motivados pela busca do êxito da racionalidade estratégica como orientados pelo reconhecimento de sua validade através da racionalidade comunicativa, o qual se dissolve, contudo, quando se considera a democracia como um processo aberto para a solidariedade dos cidadãos no mundo da vida.

  9. Pioneirismo da associacao brasileira de enfermagem no desenvolvimento da pesquisa: da revista ao centro de pesquisa

    Directory of Open Access Journals (Sweden)

    Lais de Araujo Pereira

    2013-09-01

    Full Text Available O presente estudo tem como objetivo analisar as primeiras iniciativas da Associação Brasileira de Enfermagem para o desenvolvimento da pesquisa em enfermagem. Com um recorte temporal que engloba o período de 1932 a 1971, ano de criação da Revista Brasileira de Enfermagem à criação do Centro de Estudos e Pesquisas, da Associação Brasileira de Enfermagem. As fontes utilizadas foram documentos escritos localizados no Centro de Documentação da Escola de Enfermagem Anna Nery da Universidade Federal do Rio de Janeiro e no Centro de Memória da Associação Brasileira de Enfermagem, além de edições da revista localizadas na Biblioteca Setorial da Pós-Graduação da Escola de Enfermagem Anna Nery. Percebe-se, nesta análise, que os empreendimentos realizados por essa entidade representaram um verdadeiro espaço de investigação e de formação de enfermeiros pesquisadores no Brasil.

  10. Custos da qualidade

    Directory of Open Access Journals (Sweden)

    Gilberto Caetano

    2009-01-01

    Full Text Available Este artigo pretende demonstrar através de uma síntese histórico-conceitual , a evolução da importância do sistema de qualidade, bem como a sua mensuração no processo de tomada de decisão das organizações frente à competitividade estabelecida no contexto da globalização. Assim, procura dar ênfase à ação planejada no sentido de reduzir ou eliminar falhas e defeitos nos vários processos, com vistas a agregar valor ao cliente e ao mesmo tempo reduzir os custos da não-conformidade. Palavras-chave: Custo, qualidade, satisfação, inspeção, controle, requisito, conformidade, não-conformidade, mensuração, processo, prevenção, problema e avaliação. Abstract This article intends to demonstrate through a historical-conceptual synthesis, the evolution of the importance of the quality system, as well as your measurement the process of decision making of the organizations front to the established competitiveness in the context of the globalization. Like this, it tries to give emphasis to the action drifted in the sense of to reduce or to eliminate flaws and defects in the several processes, with views to join value to the customer and at the same time to reduce the costs of the no-conformity. Key-words: Cost, quality, satisfaction, inspection, control, requirement, conformity, no-conformity, measurement, process, prevention, problem and evaluation.

  11. A moralidade da nanotecnologia

    OpenAIRE

    2012-01-01

    A nanotecnologia é um conjunto formado por saberes, técnicas e práticas que estudam e exploram as novas propriedades dos materiais, quando manipulados em níveis atômicos e moleculares. A possibilidade técnica de organizar e controlar a matéria, desde suas menores dimensões e unidades, pode implicar profundas transformações no processo industrial de produção e ter consequências, moralmente significativas, sobre as inter-relações humanas, a organização da conjuntura social vigente e o próprio f...

  12. Pensamento da America

    OpenAIRE

    2013-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em História, Florianópolis, 2013. Esta dissertação objetivou investigar a atividade editorial de Rui Ribeiro Couto e Renato Costa Almeida enquanto estes intelectuais estiveram à frente do Pensamento da America, uma publicação mensal vinculada ao A Manhã, jornal porta voz do Estado Novo. Este suplemento panamericano veio a público entre 1941 e 1949, no entanto a...

  13. Propriedades antioxidantes da melatonina

    OpenAIRE

    Teixeira,Adriana

    2003-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas. Programa de Pós-Graduação em Neurociências. Foram investigadas as ações da melatonina (MEL) contra a lipoperoxidação (LPO) induzida por hidroxil (OH), ascorbil (Asc) e peroxinitrito (ONOO-) em diversos modelos de membranas como lipossomas de fosfatidilcolina (LipPC) e asolecitina (LipASO), microssomas de cérebro (MicC) e fígado (MicF) e homogeneizado de cérebro (HC); e seu efeito contra enzimas ...

  14. Fisiopatogênese da dor

    Directory of Open Access Journals (Sweden)

    Miguel R. Covian

    1965-09-01

    Full Text Available O estudo da dor é um capítulo do estudo das bases neurofisiológicas da sensação, pois a dor nada mais é que uma sensação de conteúdo desagradável originada por estímulos nocivos. Enquanto a função das outras modalidades sensoriais é informativa ou gnósica, a dor é de proteção. O estudo da fisiología da dor compreende o estudo dos receptores, dos estímulos, das vias, das estruturas do sistema nervoso central que partici- pam da fisiología da dor, da percepção dolorosa e das reações motoras e neurovegetativas. São analisados os receptores e as vias e discutidas sua especificidade, assim como a transmissão da dor rápida e lenta por vias nervosas diferentes até o córtex cerebral. É comentada a influência da atenção na intensidade da percepção dolorosa e, com base em estudos experimentais, é considerado que o circuito retículo-córtico-reticular seja indispensável para a percepção da dor. No tocante à patologia da dor é examinada a insensibilidade congênita à dor, sendo admitida a hipótese de que em algumas sinapses é modificado o esquema de impulsos que darão lugar à sensação dolorosa. É destacado o papel do lobo frontal como parte de um mecanismo pòtenciador que condiciona o sofrimento geral do paciente. A dor referida é explicada pela teoria da "convergência-projeção" de fibras viscerais com fibras cutâneas dolorosas sôbre o mesmo neurônio em algun ponto da via sensitiva. O resultado da hipofisectomia trazendo uma diminuição ou anulação da dor no câncer do seio abre debates em tôrno do papel dos hormônios na percepção dolorosa.

  15. Aspectos moleculares da anemia falciforme

    Directory of Open Access Journals (Sweden)

    Galiza Neto Gentil Claudino de

    2003-01-01

    Full Text Available No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG no gene que codifica a cadeia beta da hemoglobina, originando diferentes haplótipos da doença, permitiu um melhor e mais amplo conhecimento em torno da heterogeneidade clínica nos pacientes falcêmicos. Analisando a hemoglobina na sua estrutura normal e mutante, sua produção e evolução, pode-se ter um entendimento mais completo da fisiopatologia desta doença e da sua complexidade clínica.

  16. Fractais : da geometria à videoarte

    OpenAIRE

    2013-01-01

    A descoberta da geometria fractal é datada de meados do séc. XX. É conhecida como a geometria da natureza já que permite descrever muitos fenómenos naturais que apresentam irregularidades que são impossíveis de descrever através dos princípios da geometria tradicional. O aparecimento de novas tecnologias digitais veio alterar o modo como a arte é encarada. Este trabalho pretende demonstrar possibilidades de integração da geometria fractal e a Teoria do Caos na criação de videoarte, b...

  17. Alteration in the absorption cell dose arising from the use of gold nanoparticle associated with the radionuclides of clinical application: simulate study; Alteracao na absorcao de dose celular decorrente da utilizacao de nanoparticulas de ouro associadas a radionuclideos de aplicacao clinica: estudo simulado

    Energy Technology Data Exchange (ETDEWEB)

    Culik, Lucas; Schwarcke, Marcelo, E-mail: mschwarcke@unifra.br [Centro Universitario Franciscano (UNIFRA), Santa Maria, RS (Brazil)

    2015-12-15

    The present work is a proposal to assess, which is the efficiency in the use of radionuclides of clinical application in nuclear medicine service conjugated system with gold nanoparticles.To obtain the results needed for the interpretation of this combination, was using the Monte Carlo simulation code PENELOPE, where was the main structures of a simulated eukaryote cell. To simulate irradiation on cellular structures was used the emission spectrum of main radionuclide clinical use in nuclear medicine service. The material containing gold nanoparticles was modeled according the stoichiometric proportions found in the literature. The results obtained, present for the simulated energies to smaller bodies than 2,0μm, no substantial response to the use of nanoparticles in the reinforcement of locally absorbed dose. Is observed a small decrease in locally dose absorbed due to emission of charged particles, it is believed that causes an increase in the emission secondary range to be placed outside the study body. But this effect is small when comparing to the increase of energy absorbed due to interaction with the bodies containing nanoparticles, so demonstrating an increase in the locally dose absorbed. Being observed that there is an increase in dose absorbed locally due to the use of nanoparticles. For protocols based on the principle of target radionuclide therapy, the imaging of the treaty sit will be affected in their statistical accuracy, since the gamma radiation will be attenuated by the nanoparticles present in the material. Being necessary to know if this increase in the locally absorbed dose has greater importance in the treatment protocol than the image of the absorption of the radioactive material in the target organ. (author)

  18. 18. Annual meeting of the Federation of Societies on Experimental Biology; 19. Brazilian congress on clinical research; 28. Brazilian congress on neuroscience and behaviour. Accepted abstracts; 18. Reuniao Anual da Federacao de Sociedades de Biologia Experimental; 19. Congresso brasileiro de investigacao clinica; 28. Congresso brasileiro de neurociencias e comportamento. Resumos aceitos

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    Utilization of radioisotopes and ionizing radiations is reported in several aspects related to various diseases. Biological pathways, biological receptors and metabolism are studied by radioassay, tracer techniques, labelled compounds (C14, tritium compounds, e.g.) and radiopharmaceuticals application. Radiotherapy, nuclear medicine and radiation effects are studied as well. In vivo dynamic function studies are presented, mainly in rats and mice. Environmental issues are also considered, specially regarding to soils and plants.

  19. O ensino de contrôle da fertilidade e de problemas populacionais em escolas médicas brasileiras The teaching of fertility and population problems at Brazilian schools of medicine

    Directory of Open Access Journals (Sweden)

    João Yunes

    1970-06-01

    Full Text Available Foi realizada em 1967 uma pesquisa sôbre o ensino do contrôle da fertilidade e de problemas populacionais em 42 escolas médicas brasileiras. Verificou-se, que das 22 escolas médicas que responderam ao questionário, 14 ensinavam o contrôle da fertilidade e 6 expressaram interêsse em iniciar tal ensino. Grande interêsse foi demonstrado nos aspectos sociais e demográficos e grande ênfase foi dada para a indicação do contrôle da fertilidade nos casos de "enfermidade ou agravamentos físicos", assim como para "problemas psiquiátricos". A viabilidade de clinicas para o ensino aos estudantes de medicina em técnicas contraceptivas foi em geral muito baixa. O uso de pílulas anovulatórias e o método do ritmo foram os contraceptivos preferidos para o ensino.A survey of teaching about fertility regulation and population problems in the 42 medical schools of Brazil was carried out in 1967. Fertility regulation was taught in 14 of the 22 schools; which replied, and 6 expressed intention to start such teaching. Interest in demography and social aspects was higher, and great emphasis was placed on giving contraceptive help for "physical illnes" or "impairment" and "phychiatric problems". Availability of clinical facilities for teaching students to give contraceptive services; was generally low. Pill and the rythm method were the preferred contraceptive for teaching medical students.

  20. Dos Males da Medida

    Directory of Open Access Journals (Sweden)

    Schwarcz Lilia Moritz

    1997-01-01

    Full Text Available Esse artigo tem como objeto a difícil percepção da "diferença". Tema polêmico, o debate sobre as variedades culturais foi transformado, em meados do século XIX, em uma questão racial e, nesse sentido, vinculado às regularidades da biologia. Tecendo comparações entre os teóricos raciais brasileiros e os impasses mais contemporâneos, sobre a aferição de inteligência e capacidade, esse ensaio pretende provocar. Em pauta estarão as contradições que têm se destacado, mais recentemente, quando se opõem de um lado as etnicidades locais, de outro a tão propalada globalização. Tal qual dois lados de uma mesma moeda, a afirmação de identidades tem se mostrado tão evidente como o próprio estreitamento das relações internacionais. Mudam os termos do debate - de raça, para etnia -, mas, de alguma maneira, continuamos presos a uma lógica positiva de estabelecimento de hierarquias ontológicas.

  1. A morte da bailarina

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    Nancy Mangabeira Unger

    2010-04-01

    Full Text Available A história do Ocidente pode ser lida de acordo com o sentido da palavra grega hybris: transgressão, presunção, desmesura. Hoje, vivemos o ápice de um percurso marcado pela desejo de tudo dominar. Por sua extrema gravidade, a crise contemporânea nos coloca diante da responsabilidade de questionar a própria dimensão na qual pensamos, e a maneira em que compreendemos nossa identidade enquanto humanos e nosso lugar na totalidade do real.Palavras-chave: civilização ocidental; crise; hybris; questionamento. AbstractThe history of the West can be read according to the meaning of the greek word hybris: transgression, arrogance, loss of measure. We presently live the pinnacle of a course marked by the desire to dominate all beings.  The extreme gravity of  contemporary crisis confronts us with the responsibility of questioning the very dimension in which we think, as well as the manner in which we understand our identity as human beings and our place in the totality of being.Key words: western civilization; crisis; hybris; questioning. 

  2. Tumores cartilaginosos da laringe

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    Thomé Robert

    2001-01-01

    Full Text Available Introdução: Os tumores cartilaginosos da laringe são raros, sendo a cartilagem cricóide a mais acometida. A raridade desses tumores tem como conseqüência experiência limitada e, portanto, o conhecimento a respeito destas neoplasias apresenta pontos obscuros. Objetivo: Apresentar os resultados cirúrgicos bem como o seguimento a longo prazo de 6 pacientes com tumores cartilaginosos da laringe, 4 condrossarcomas de baixa malignidade e 2 condromas. Forma de estudo: Retrospectivo não randomizado. Material e método: Cinco dos tumores acometiam a cartilagem cricóide e 1 a tireóide. Os pacientes foram submetidos a laringectomia parcial (4 e total (2, com seguimento de 6 a 30 anos (média-19,5 anos. Resultados: Nenhum dos pacientes apresentou metástase ou morte relacionada ao tumor. A sobrevida alcançada por 5 anos foi de 100% e a por 20 anos, 67%, sendo a comorbidade responsável por tal decréscimo. Conclusões: Nossos resultados reforçam o conceito de que a laringectomia conservadora seja a modalidade ideal de tratamento, reservando a ressecção total para tumores extensos ou casos de recorrência. Há indícios de que 5 anos pode não ser tempo suficiente para observar recorrência no condrossarcoma de baixo grau de malignidade.

  3. Os usos da diversidade

    Directory of Open Access Journals (Sweden)

    Clifford Geertz

    1999-05-01

    Full Text Available Resumo Ao discorrer sobre o “Futuro do Etnocentrismo”, este artigo parte da premissa de que a globalização, apesar de ter – em muitos casos – diminuído as diferenças entre povos, não tem amenizado os preconceitos e as formas de discriminação que ocorrem em nome dessas diferenças. Ele resgata a importância do antropólogo neste cenário lembrando que a diversidade cultural faz parte da sociedade complexa, remetendo-se não apenas a grupos étnicos ou nacionais bem delimitados, mas também a diferenças de geração, gênero, sexo e classe, entre outros. Neste contexto, a tolerância passiva de modos distantes de vida assim como a aceitação pragmática de nosso próprio paroquialismo são atitudes não somente intelectualmente desonestas mas também moralmente repreensíveis. É no encontro incômodo de subjetividades variantes na sua própria sociedade que o antropólogo define seu lugar.

  4. Lesões desportivas no atletismo: comparação entre informações obtidas em prontuários e inquéritos de morbidade referida Lesiones deportivas en el atletismo: comparacion entre las informaciones obtenidas en historias clinicas y consultas de la morbilidad referida Sports injuries in track and field: comparison between information obtained in medical records and reported morbidity inquires

    Directory of Open Access Journals (Sweden)

    Carlos Marcelo Pastre

    2004-02-01

    Full Text Available Para compreender as lesões desportivas (LD é necessário quantificá-las, associando-as a fatores causais particulares ao esporte. Contudo, faltam registros sobre tais agravos nas instituições esportivas, sobretudo no atletismo brasileiro, em que poucos clubes possuem serviços de assistência à saúde. Na ausência de tais registros, estudos na área de saúde pública, utilizam-se de outros recursos epidemiológicos para coletas, tais como os inquéritos de morbidade referida. A partir dessa escassez de informações e a facilidade de obtenção de dados junto aos próprios atletas, objetivou-se, para esta pesquisa, levantar informações sobre LD referidas por atletas de alto rendimento, retrocedendo em oito meses, e compará-las com os registros de prontuários clínicos. Para tanto, foram tomados 25 atletas de elite, 16 do gênero masculino e nove do feminino, com idade de 25,7 ± 4,4 anos, altura de 1,74 ± 0,10m, peso 70,4 ± 13,15kg e tempo médio de treinamento de 8,38 ± 4,06 anos. Dois fisioterapeutas foram treinados separadamente para coletar informações sobre LD. Um deles em prontuários e o outro dos próprios atletas, através de entrevista (inquéritos de morbidade referida - IMR. Estudo de concordância de respostas para as duas formas de coleta foi realizado pelo teste da proporção binomial, estabelecendo-se limites de 95% de confiança para a concordância. Os resultados mostraram que em todas as variáveis estudadas os valores estavam dentro dos limites de confiança estabelecidos pelos testes estatísticos, sendo: 88,33% para as variáveis tipo de lesão ou agravo e mecanismo de lesão ou aumento dos sintomas, 90% para a variável qualidade do retorno às atividades desportivas e 91,67% para as variáveis local anatômico e período de treinamento. Concluiu-se que houve elevada taxa de concordância entre as informações levantadas, mostrando a eficácia do IMR para a coleta de informações sobre les

  5. Evaluation of the permeability and morphological alteration of the dental surface after apicoectomy, treatment and preparation with Er:YAG and Nd:YAG lasers; Avaliacao da permeabilidade e da alteracao morfologica da superficie dentinaria apos apicectomia, tratamento e retropreparo com os lasers de Er:YAG e Nd:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Rodrigo Guerra de

    2001-07-01

    One of the objectives of endodontic treatment is to resolve pathological periapical processes caused by microbial contamination of the dental pulp. Correct execution of the necessary chemical preparation prior to surgery generally results in positive outcomes. However, a percentage of cases do not respond favorably and therefore require retreatment, a conservative therapeutic option. There are meanwhile a number of treatment failures which do not respond to these conservative measures and must therefore be subjected to paraendodontic surgical procedures. One of the principal problems of this therapeutic conduct is linked to the surface permeability of the dentin after apicoectomy and the lack of adequate marginal adaptation between the retrofilling material and the cavity walls. This permits the percolation of microorganisms and their metabolic by products from the system of root canals to the periapical region, thereby compromising the necessary tissue repair. The present work proposes the evaluation of the surface and marginal permeability of cut dentin after apicoectomy and treatment with Er:YAG and Nd:YAG lasers with fiber optics and then retrofilled with intermediate restorative material (IRM). A total of 24 single rooted teeth whose canals were endodontically treated were divided into 3 experimental groups: group I, whose apices were sectioned with an Er:YAG laser and the resulting cavity and the cut dental surface were irradiated with this laser via a 50/10 type fiber; in group II the apicoectomy was conducted with an Er:YAG laser and the resulting cavity and the cut surface were irradiated with a Nd:YAG laser; in group III, the samples were apicoectomized and the cavities were treated with a high speed bur (control group). Analysis of the infiltration of the dye methylene blue throughout the cut dental surface and the reconstruction demonstrated that the samples in the irradiated groups presented lower indices of infiltration than the control group. The Group I samples, meanwhile, did not present statistically significantly better results than the control group. Group II presented statistically significantly less infiltration than the other experimental groups. This result is compatible with the morphological and structural alterations evidenced by scanning electron microscopy: the group I samples (Er:YAG) presented clean, irregular surfaces with the presence of some cratering, without a smear layer and with the dental tubules exposed. The group II samples (Er:YAG and Nd:YAG) presented smoother, clean surfaces, without a smear layer, with fusion and resolidification of the dentin which sealed the dental tubules. Under the conditions of the study, apicoectomy with the Er:YAG laser followed by subsequent treatment of the cut surface and resulting cavity with a Nd:YAG laser, have shown as an option capable of reducing the permeability of the dentin to methylene blue dye. (author)

  6. Evaluation of the activity concentration of {sup 226}Ra, {sup 228}Ra and {sup 210}Pb in sediments from Antarctica in the Admiralty bay region; Avaliacao da concentracao de atividade de Ra-226, Ra-228 e Pb-210 em sedimentos provenientes da Antartica na regiao da baia do Almirantado

    Energy Technology Data Exchange (ETDEWEB)

    Mora, Tamires de Araujo

    2015-07-01

    The natural radionuclides from radioactive series of {sup 238}U, {sup 235}U and {sup 232}Th have been applied as tracers in environmental studies for understanding the dynamics that occur in both marine and terrestrial environment, as for example, in research of oceanic processes and management of the coastal region. In the marine environment, these radionuclides can be used to estimate biogeochemical fluxes of marine particles and nutrients that occur in the water column as well as in the sediment. Several research works applied the distribution and the respective disequilibrium degree of natural radionuclides in the environment, including geochronological models for obtaining historical information on samples of certain sediment profile. In this study we performed a radiochemical characterization of the distribution of {sup 226}Ra, {sup 228}Ra and {sup 210}Pb from a sedimentary column called 1B (248 cm long) collected in the Admiralty Bay, Antarctic Peninsula region. The methodology used included the acid leaching of sediment samples followed by the radiochemical sequential separation of {sup 226}Ra and {sup 228}Ra by co-precipitation with Ba(Ra)SO{sub 4} and {sup 210}Pb by co-precipitation with PbCrO{sub 4}. All measurements were carried out by counting of gross alpha and gross beta measures in a low background gas flow proportional detector. The activity concentrations of {sup 226}Ra and {sup 210}Pb were used to estimate the unsupported {sup 210}Pb activities present in sediment profile 1 B. Based on unsupported {sup 210}Pb data and the application of the CIC model (Constant Initial Concentration), it was possible to determine the sedimentation rate of 0.59 ± 0.05 cm /year. (author)

  7. Evaluation in vitro of effects of Er:YAG and Nd:YAG lasers irradiation on root canal wall, by stereoscopy, scanning electron micrography and thermographic camera; Avaliacao in vitro dos efeitos da irradiacao laser de Er:YAG e Nd:YAG na parede dentinaria do canal radicular, sob observacao do estereoscopio, da micrografia eletronica e da camera termografica

    Energy Technology Data Exchange (ETDEWEB)

    Goya, Claudia

    2001-07-01

    This study was carried out to evaluate in vitro the effects of Nd:YAG laser and Er:YAG laser irradiation in the root canal wall by SEM, evaluating the apical leakage and the temperature changes during the laser irradiation. Seventy four extracted human teeth were used, they were instrumented and divided into seven groups of 10 teeth each. The teeth were evaluated through stereoscopy, by SEM, and with the thermographic camera. The Nd:YAG laser irradiation parameters were 100 mJ/p, 15 Hz, and Er:YAG laser were 160 mJ/p and 10 Hz, the irradiation was 4 times at 2 mm/sec speed, with 20 sec interval. The apical leakage was not observed in the teeth irradiated by Nd:YAG laser alone or in association with Er:YAG laser. However in the teeth irradiated only by the Er:YAG laser we observed a little leakage. By SEM observation the Nd:YAG laser irradiation showed melting and recrystallization in the dentin surface closing dentinal tubules, and in the samples irradiated by Er:Y AG laser a clean surface, opened dentinal tubules, and the combination by two lasers, showed melting covering some dentinal tubules The thermographic study found the temperature increase was not more than 6 deg C. This study showed the safety parameters applications of Er:YAG laser in association with Nd:YAG laser in root canal treatment, in order to not cause thermal damages to the periodontal tissues. (author)

  8. The use of magnetic resonance imaging in the diagnosis and evaluation of dermatomyositis: report of two cases and review of the literature; Papel da ressonancia magnetica no diagnostico e na avaliacao da dermatomiosite: relato de dois casos e revisao da literatura

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, Renata La Rocca; Silva, Jader Jose da; Amaral, Denise Tokechi do; Fernandes, Artur da Rocha Correa [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem]. E-mail: relarocca@uol.com.br

    2005-04-15

    Dermatomyositis is an autoimmune inflammatory disorder that usually affects skeletal muscle causing muscle weakness in the thighs and pelvic girdle. The diagnosis and the determination of disease activity are based on clinical and laboratorial tests. Magnetic resonance imaging has been described in recent studies as a useful method for the diagnosis of dermatomyositis, in guided muscle biopsy as well as in the determination of disease activity. We report two cases of dermatomyositis with MRI findings and present a review of the literature. (author)

  9. Evaluation of seawater contamination with benzene, toluene and xylene in the Ubatuba north coast, SP region, and study of their removal by ionizing radiation; Avaliacao da contaminacao da agua do mar por benzeno, tolueno e xileno na regiao de Ubatuba, litoral norte (SP) e estudo da degradacao destes compostos por radiacao ionizante

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Kelly Cristina Santana de

    2006-07-01

    A major concern with leaking petroleum is the environmental contamination by the toxic and low water-soluble components such as benzene, toluene, and xylenes (BTX). These hydrocarbons have relatively high pollution potential because of their significant toxicity. The objective of this study was to evaluate the contamination of seawater by the main pollutants of the output and transport of petroleum, such as benzene, toluene, and xylene, and their removal by the exposure to the ionizing radiation. The studied region was Ubatuba region, SP, between 23 deg 26'S and 23 deg 46'S of latitude and 45 deg 02'W and 45 deg 11'W of longitude, area of carry and output of petroleum, and samples were collected from November, 2003 to July, 2005. For BTX in seawater analysis, the Purge and Trap concentrator with FIDGC detector showed significantly higher sensibility than Head Space concentrator with MSGC detector. The minimal detected limits (MDL) obtained at FIDGC were of 0.50 {mu}g/L for benzene, 0.70 {mu}g/L for toluene, and 1.54 {mu}g/L for xylene, and the obtained experimental variability was 15%. While the concentrator type Headspace system with MS detector showed higher MLD, about of 9.30 mg/L for benzene, 8.50 mg/L for toluene, and 9.80 mg/L for xylene, and 10% of experimental variability. In the studied area the benzene concentration varied from 1.0 {mu}g/L to 2.0 {mu}g/L, the concentration of toluene varied from < 0.70 {mu}g/L to 3.24 {mu}g/L and the maximum value of xylene observed was of 2.92 {mu}g/L. The seawater samples contaminated with BTX standard and exposed to ionizing radiation using a source of {sup 60}Co, presented a removal from 10% to 40% of benzene at 20 kGy absorbed doses and concentration of 35.1 mg/L and 70.2 mg/L, respectively; from 20% to 60% of toluene removal with 15 kGy absorbed dose and from 20% to 80% of xylene with 15 kGy absorbed dose in similar concentrations. (author)

  10. Biological effects of light: application of low power therapy using LEDs (Light Emitting Diode on the healing of venous ulcers: a case report Efeitos biológicos da luz: aplicação de terapia de baixa potência empregando LEDs (Light Emitting Diode na cicatrização da úlcera venosa: relato de caso

    Directory of Open Access Journals (Sweden)

    Valdênea Aparecida Bordinassi de Castro

    2009-08-01

    Full Text Available The use of low power light sources, such as diodes emitters of light – LEDs, provides an alternative and complementary therapeutic resource to the conventional ones, with the advantage of being cost-effective and reliable in the treatment of ulcers and other infirmities. This study was carried out on a patient from the HC/UEL Outpatient Clinic with ulcers on both lower limbs. LEDs were applied once a week, using a wave length of 628 nm on the left lower limb ulcer ,using the right limb as control. Evolution was measured through photographic registers, area size and pain assessment. Eighteen sessions were performed. Results showed that changes were observed on the clinical characteristics of the injury and the healed area was 30% larger when compared to the control. As for the pain assessment, the visual analogue scale varied from eight to zero on the limb radiated and from nine to two on the control. Thus, it can be concluded that the LED therapy is a resource of choice for treating venous ulcer, in both healing and pain reduction aspects O emprego de fontes de luz de baixa potência, como diodos emissores de luz-LEDs, pode propiciar um recurso terapêutico opcional aos convencionais ou ser utilizado em conjunto com estes, com a vantagem do baixo custo e comprovada eficiência no tratamento de úlceras e outras enfermidades. O estudo de caso foi realizado com um paciente do Ambulatório de Clinicas do HC/UEL que apresenta úlceras nos membros inferiores. A aplicação foi feita uma vez por semana, empregando LEDs com comprimento de onda de 628 nm na úlcera do membro inferior esquerdo e o direito foi utilizado como controle. A evolução foi medida por meio de registro fotográfico, medida da área e mensuração da dor. Foram realizadas 18 sessões. Os resultados apontaram mudanças nas características clínicas da lesão e a área cicatrizada foi 30% maior em relação à úlcera controle. Quanto à dor, a escala análoga visual variou de

  11. Berengario da Carpi.

    Science.gov (United States)

    De Santo, N G; Bisaccia, C; De Santo, L S; De Santo, R M; Di Leo, V A; Papalia, T; Cirillo, M; Touwaide, A

    1999-01-01

    Berengario da Carpi was magister of anatomy and surgery at the University of Bologna from 1502 to 1527. Eustachio and Falloppia defined him as 'the restaurator of anatomy'. He was a great surgeon, anatomist and physician of illustrious patients including Lorenzo II dei Medici, Giovanni dalle Bande Nere, Galeazzo Pallavicini, Cardinal Colonna, and Alessandro Soderini. He had strong links to the intellectuals of his time (Forni, Bonamici, Manuzio, Pomponazzi) as well as with the Medici family. He was respected by the Popes Julius II, Leo X and Clement VII. His main contributions are the Isogogae Breves, De Fractura calvae sive cranei, and the illustrated Commentaria on the Anatomy of Mondino de Liucci, a textbook utilized for more than 200 years, which Berengario aimed to restore to its initial text. The Commentaria constitutes the material for the last part of this paper which concludes with a personal translation of some passages on 'The kidney', where the author gives poignant examples of experimental ingenuity.

  12. Em favor da talassografia

    Directory of Open Access Journals (Sweden)

    Jean-Louis Boudou

    2001-01-01

    Full Text Available A Talassografia (“descrição do mar” interessa-sepelos impactos físicos, biológicos, ecológicos... culturais da violenta antropização dos ambientes costeiros (oceânicos e continentais, caracterizados pelaexigüidade, vulnerabilidade, fragilidade e plasticidade. Como o Brasil é um “país marítimo”, os geó-grafos (os talassógrafos brasileiros são convidadosa intensificar suas pesquisas nas áreas costeiras e acriar novas estruturas para divulgá-las: Revista, Encontros, Associação, Pós-Graduação... tudo em prolda talassografia.

  13. Fisiologia da caquexia

    OpenAIRE

    Gonçalves, Catarina Vicente

    2014-01-01

    Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz A caquexia é uma síndrome de desnutrição multifatorial que se caracteriza por uma perda de peso e perda de massa muscular. Esta síndrome parte de uma doença subjacente e pode estar presente em várias doenças crónicas como por exemplo HIV, doença renal crónica, DPOC, doença hepática crónica, insuficiência cardíaca congénita e cancro. Com este trabalho, pretendeu-se entender a definição de ca...

  14. A influência da Internet no processo ensino-aprendizagem da leitura e da escrita

    Directory of Open Access Journals (Sweden)

    Evanice Ramos Lima Barreto

    2010-03-01

    Full Text Available

    A Internet constitui um dos grandes avanços da comunicação humana. Através dela, é possível o contato com uma infinidade de informações, veiculadas pelos mais diversos gêneros de texto. Por isso, sendo um dos meios de comunicação que mais se expandiu no mundo, a Internet se apresenta como uma ferramenta indispensável no ensino-aprendizagem da leitura e da escrita. Partindo desse pressuposto, o presente trabalho pretende apresentar os resultados de um estudo que tem por objetivo investigar, à luz dos pressupostos empreendidos por Soares (1998 e Dionísio (2005, qual o “lugar” da Internet no processo de ensino-aprendizagem da leitura e da escrita, bem como até que ponto ela interfere de forma positiva e/ou negativa nesse processo. Para tanto, foram aplicados questionários a professores e alunos do Ensino Médio. A partir da análise dos dados, pretende-se verificar como a sobrecarga de informações, bem como o uso inadequado da Internet podem trazer implicações para o desenvolvimento dessas atividades.

  15. Dimensão da maturidade à luz da logoterapia

    Directory of Open Access Journals (Sweden)

    Libardi, Tadeu Antonio

    2008-01-01

    Full Text Available O artigo aborda o tema da maturidade humana à luz da logoterapia, fundada por Viktor Emil Frankl. Nos dias de hoje, existe a frustração existencial, não mais a sexual, como analisada por Freud. Cada ser humano, como pessoa livre e responsável e tendo como meta a busca da maturidade, vai percorrendo seu próprio caminho, que o leva à ceitação de si, de seus limites e potencialidades e ao relacionamento social e religioso, capacitando-o ao confronto com o sofrimento humano

  16. Controle da ferrugem e da broca-dos-ramos da figueira com diferentes fungicidas e inseticidas

    Directory of Open Access Journals (Sweden)

    Éder Júnior Mezzalira

    2015-02-01

    Full Text Available Temperaturas e precipitações elevadas favorecem a incidência da ferrugem (Cerotelium fici(Cast. e da broca-dos-ramos (Azochis gripusalis (Walker, 1859 (Lepidoptera: Pyralidae, limitando a produção comercial de figos. O objetivo deste trabalho foi comparar a eficiência de fungicidas e inseticidas alternativos em relação à de produtos convencionais registrados para a cultura. Foram realizados dois experimentos, no delineamento de blocos inteiramente casualizados, com quatro repetições, no setor de fruticultura da Universidade Tecnológica Federal do Paraná, Campus Dois Vizinhos. Para controle da ferrugem, foram utilizados, em 100 L de água, azoxistrobin (10 g, calda bordalesa (1.500 g de cal virgem + 1.500 g de sulfato de cobre e testemunha (água. No controle da broca-dos-ramos utilizaram-se, em 100 L de água, azadiractina (1.000 mL P.C., alho (Allium sativumL. (100 mL P.C., cinza (20.000 g, extrato de fumo (nicotina (10.000 mL do preparado, deltametrina (50 mL P.C., Bacillus thuringiensisBerliner (100 g P.C., rotenona (1.000 mL P.C., sabão de coco (1.000 g e testemunha (água. A calda bordalesa foi o tratamento mais efetivo no controle da ferrugem, promovendo aumento da produtividade e da qualidade dos frutos. A deltametrina promoveu o melhor controle da broca-dos-ramos da figueira. Entre os produtos alternativos testados, o alho foi o mais efetivo no controle dessa praga.

  17. Dificuldades da aprendizagem na leitura

    Directory of Open Access Journals (Sweden)

    Solange Oliveira Nascimento

    2011-07-01

    Full Text Available Este presente artigo propôs verificar os fatores que influenciam no desenvolvimento da aprendizagem na leitura dos alunos da 4º ano no Ensino Fundamental na Escola Municipal Armando Dias no município de Sinop/MT, cujo tema é dificuldade da aprendizagem na leitura. O objetivo do trabalho foi investigar as relações interp