12 research outputs found

    PRODUCTION OF DOCOSAHEXAENOIC ACID (DHA) FROM Thraustochytrium sp. ATCC 26185 USING DIFFERENTS NITROGEN CONCENTRATIONS

    Get PDF
    In this work it was studied the polyunsaturated fatty acids (PUFAs) production, especially DHA, from Thraustochytrium sp. ATCC 26185, under different total nitrogen (TN) availability. Three different TN conditions were evaluated: two with initial concentrations of 2.4 g/L and 0.8 g/L, and the third in a fed-batch process with a rate of 0.009 g/L.h. For each experiment the biomass, glucose, TN and PUFAs were determined. The major composition of the PUFAs in Thraustochytrium sp. ATCC 26185 cell biomass were DPA ω6 (21-25 %) and DHA (69-73 %), regardless of the type and time of culture. The maximum cell concentration (30.2 g/L) was obtained using 2.4 g/L TN in 168 h of culture. With this same concentration of TN it was possible to produce the highest concentration of DHA (1.16 g/L) in 120 h of culture, demonstrating that the growth of Thraustochytrium sp. ATCC 26185 and yield of PUFAs are dependent on the source concentration of TN available for consumption of this oleaginous microorganism, as well as culture time

    PRODUCTION OF DOCOSAHEXAENOIC ACID (DHA) FROM Thraustochytrium sp. ATCC 26185 USING DIFFERENTS NITROGEN CONCENTRATIONS

    Get PDF
    Polyunsaturated fatty acids (PUFAs) of the type ω3 and ω6 play important physiological functions in human organism, since they are components of cell membranes and brain cells; they decrease the levels of triglycerides and can prevent the incidence of coronary heart disease. Various parameters, including concentration of the nitrogen source in the cultivation of oleaginous microorganisms have been reported to be essential in the biosynthesis and accumulation of PUFAs. The objective of this work is to study the effect of different concentrations of total nitrogen (TN) in the production of PUFAs, especially DHA, from Thraustochytrium sp. ATCC 26185. The concentrations of TN evaluated were 2.4 and 0.8 g/L (batch) and 0.009 g/L (hourly) under fed-batch process. The content of cell biomass, glucose consumption, TN and production of PUFAs was determined. The major composition of the PUFAs in Thraustochytrium sp. ATCC 26185 cell biomass were DPA ω6 (21-25%) and DHA (69-73%), regardless of the type and time of culture. The maximum cell concentration obtained (30.2 g/L) was using 2.4 g/L TN in 168 h of culture. With this same concentration of TN it was possible to produce the highest concentration of DHA (1.16 g/L) in 120 h of culture, demonstrating that the growth of Thraustochytrium sp. ATCC 26185 and yield of PUFAs are dependent on the concentration TN source available for consumption of this oleaginous microorganism, as well as culture tim

    Validation of the Short-Version of Rose Angina Questionnaire in Brazil

    Get PDF
    Background: Stable angina pectoris is a serious condition with few epidemiological studies in Brazil. Objective: To validate the short-version of the Rose angina questionnaire in Brazilian Portuguese for its implementation in surveys and longitudinal studies. Methods: A total of 116 consecutive patients from an outpatient clinic without prior myocardial infarction and/or coronary revascularization were enrolled for application of three questions of the Rose angina questionnaire addressing chest pain after exertion. We used the treadmill test as the gold standard with the Ellestad protocol. Results: The short-version of the Rose angina questionnaire of the 116 subjects submitted to the exercise treadmill test disclosed 89.7% of accuracy, 25% of sensitivity, 92.0% of specificity, 10.0% of positive predictive value, 97.2% of negative predictive value, and 3.1 of positive likelihood ratio and 0.82 of negative likelihood ratio. Conclusion: The Portuguese version with three items of the Rose angina questionnaire is suitable for epidemiological purposes. (Arq Bras Cardiol 2012; 99(5): 1056-1059

    Mensagem - Casa dos Estdantes do Império 1944-1994, Número Especial

    Get PDF
    A Casa dos Estudantes do Império (CEI) foi criada em 1944 pelo então Ministério das Coló- nias e pelo Comissariado Nacional da Mocidade Portuguesa sendo destinada ao enquadramento dos estudantes oriundos das Colónias portuguesas (de África, Índia, Macau e Timor). O eco das independências africanas ocorridas ao longo da década de 50 repercutiu-se no império colonial português, onde o regime do Estado Novo registava então grande contestação. Neste contexto histórico muitos jovens estudantes associados à CEI procuraram caminhos de descoberta / construção da identidade dos territó- rios de que eram originários com diversas iniciativas culturais, entre as quais a atividade editorial. A Associação Casa dos Estudantes do Império (ACEI), constituída por associados da CEI, em 1994 e com existência até 1997, reeditou, pela passagem do 50.o aniversário da Casa, dois volumes das Antologias de Poesia de Angola, Moçambique e São Tomé e Príncipe e elaborou um Nú- mero Especial da MENSAGEM, um Boletim publicado pela CEI, de forma irregular, de acordo com as vicissitudes vividas, entre 1948 e 1964. A União das Cidades Capitais de Língua Portuguesa (UCCLA) deliberou levar a efeito uma homenagem aos associados da CEI, iniciada numa cerimónia que teve lugar no Auditório da Reitoria da Universidade de Coimbra, em outubro de 2014, ano em que se perfizeram 70 anos da criação da CEI. Nessa homenagem iniciou-se a distribuição das reedições das referidas Antologias, com novo formato e ainda a distribuição de uma pen com os nomes de todos os associados da CEI, resultado de uma pesquisa levada a efeito na Torre do Tombo. Para 2015, ano em que se perfazem 50 anos sobre a extinção da CEI pela PIDE programaram-se vários eventos. De entre esses eventos constam debates, um Colóquio Internacional, a realizar na Fundação Calouste Gulbenkian, uma exposição na Câmara Municipal de Lisboa e, por fim, a sessão de encerramento no dia 25 de maio, Dia de África, em que intervirão como oradores todos os associados da CEI que vieram a ser Presidentes da República ou Primeiros Ministros dos territórios de onde eram originários. A reedição deste Número Especial da Revista MENSAGEM integra-se nesta justa homenagem.À Memória de Amílcar Cabral Mário de Andrade Carlos Ervedosa e daqueles que partiram cedo demais. Ao Dr. Arménio Ferreira, cuja generosidade e apoio nos anos difíceis prolongaram a existência da Casa. Aos ESTUDANTES AFRICANOS de hoje e do futuro.Ministério dos Negócios Estrangeiros, CPLP, Instituto Camões, Câmara Municipal de Lisboainfo:eu-repo/semantics/publishedVersio

    Mielomeningocele e anomalias associadas: uma série de casos e revisão sistemática

    Get PDF
    A mielomeningocele é uma malformação congênita grave do sistema nervoso central, representando um dos tipos mais complexos de defeitos do tubo neural. A condição é marcada pela exposição das meninges e, em alguns casos, da medula espinhal, através de uma abertura na coluna vertebral, desafiando tanto o prognóstico do paciente quanto as estratégias de tratamento. O presente estudo visa explorar os avanços recentes no diagnóstico, intervenções cirúrgicas e desfechos neurológicos associados à mielomeningocele, com foco particular na eficácia e segurança das abordagens atuais. Para isso, foi realizada uma revisão sistemática da literatura de 2016 a 2024 nas bases de dados PubMed (Medline), Cochrane Library e SciELO, aplicando critérios de inclusão e exclusão rigorosos para selecionar estudos que abordassem esses aspectos. Três estudos chave foram analisados, destacando-se pelas técnicas de diagnóstico antenatal, pela utilização de intervenções cirúrgicas inovadoras, como o fechamento fetal, e pelos cuidados pós-operatórios visando melhorias nos desfechos neurológicos. Os resultados indicam uma tendência positiva na melhoria da qualidade de vida dos pacientes, com avanços significativos no controle e na prevenção de complicações a longo prazo. No entanto, foi observada a necessidade de uma abordagem multidisciplinar no tratamento, integrando cuidados neurocirúrgicos, ortopédicos e reabilitativos. A mielomeningocele, apesar dos desafios, tem testemunhado progressos notáveis nas últimas décadas, sugerindo um futuro mais promissor para os pacientes afetados. Ainda assim, são necessários mais estudos para consolidar essas abordagens e otimizar as estratégias de tratamento na prática clínica

    Squalene and DHA production by heterotrophic microalgae Aurantiochytrium sp., for Nutrition applications

    No full text
    There has been a growing trend worldwide in the use of squalene, due in part to its recognized health benefits and its range of applications. However, the growth of the industry around this resource has been extremely limited by the scarcity and limitations of sources of raw material to produce this compound. Additionally, it is recognized the interest and strategy in the exploitation and recovery of by-products and waste resulting from biorefineries, promoting more sustainable and added value practices. The aim of this work is developing a viable biotechnological process for the simultaneous production of squalene and polyunsaturated fatty acids (docosahexaenoic acid - DHA), using as alternative source heterotrophic microalgae strain, Aurantiochytrium sp., under specific growth conditions. The highest biomass production was achieved after 72 hours. The highest production of squalene (7.3 g/100 g and 250 mgL-1) and the highest productivity of DHA and polyunsaturated fatty acids (PUFA) was obtained under the following conditions: salinity at 1.5%, glucose concentration at 4%, temperature at 26-30 °C and aeration flow 3 and 9 L min -1 after 48-72 hours of cultivation. After extraction of squalene, the biomass remaining is still rich in other bioactive compounds, as DHA, whose properties make them interesting for the development of functional ingredients for use in animal feed, food, cosmetic and pharmaceutical formulas. Moreover, this approach pretends to minimize the costs and environmental impact of the remaining biomass from microalgae production through its applications in the Feed & Food areas. The obtained results showed that Aurantiochytrium sp.is a promissory alternative source of squalene and discover ways to the sustainable development of new products formulated directly from algal biomass or from DHA concentrated extracts, lessening the environmental impacts associated with the current production process. In addition, the study of squalene production and valorization study of the remaining biomass rich in DHA, enabled the studies of different biomass applications, that suggested new products. This thesis was carried out with the support of the Depsiextracta Tecnologias Biológicas Lda, with aim of found strategies to increase the squalene process. The obtained results in different chapters of this thesis provide important information that will allow the company, solved the problematic of current squalene sources scarcity, creating value through the commercialization of new products such as remaining biomass rich in DHA and / or concentrated extracts of DHA, through clean, economically environmentally sustainable systems. The company invests in strategic areas, optimizing and exploiting its technical and scientific skills. The research activities associated with this study, and the validation of the developed products were carried out in collaboration with the Portuguese sea and atmosphere institute), IPMA

    Structure for prevention of health care-associated infections in Brazilian hospitals: A countrywide study

    No full text
    Background: Minimal structure is required for effective prevention of health careeassociated infection (HAI). The objective of this study was to evaluate the structure for prevention of HAI in a sample of Brazilian hospitals. Methods: This was a cross-sectional study from hospitals in 5 Brazilian regions (n = 153 total beds: 13,983) classified according to the number of beds 11 university hospitals were used as reference for comparison. Trained nurses carried out the evaluation by using structured forms previously validated. The evaluation of conformity index (CI) included elements of structure of the Health CareeAssociated Prevention and Control Committee (HAIPCC), hand hygiene, sterilization, and laboratory of microbiology. Results: The median CI for the HAIPCC varied from 0.55-0.94 among hospital categories. Hospitals with > 200 beds had the worst ratio of beds to sinks (3.9 P <. 001). Regarding alcoholic product for handrubbing, the worst ratio of beds to dispensers was found in hospitals with < 50 beds (6.4) compared with reference hospitals (3.3 P<.001). The CI for sterilization services showed huge variation ranging from 0.0-1.00. Reference hospitals were more likely to have their own laboratory of microbiology than other hospitals. Conclusion: This study highlights the need for public health strategies aiming to improve the structure for HAI prevention in Brazilian hospitals.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Ministry of Health of Brazil, under the call MCT/CNPq/CT-Saude/MS/SCTIE/DECITUniv Sao Paulo, Sch Nursing, Dept Collect Hlth Nursing, BR-05403000 Sao Paulo, BrazilState Univ Sao Paulo, Botucatu Sch Med, Dept Infect Dis, Botucatu, SP, BrazilUniv Fed Sao Paulo, Special Clin Microbiol Lab, Infect Dis Discipline, Sao Paulo, BrazilUniv Fed Rio Grande do Sul, Clin Hosp Porto Alegre, Ctr Expt Res, Lab Res Bacterial Resistance, Porto Alegre, RS, BrazilFed Univ Para, Dept Infect Dis, BR-66059 Belem, Para, BrazilPequeno Principe Hosp, Epidemiol & Infect Control Dept, Curitiba, Parana, BrazilUniv Fed Ceara, Fac Med, Dept Community Hlth, Fortaleza, Ceara, BrazilUniv Fed Paraiba, Clin Microbiol Discipline, BR-58059900 Joao Pessoa, Paraiba, BrazilHosp Infect Control Comm, Inst Med Integral Prof Fernando Figueira, Recife, PE, BrazilPontifical Catholic Univ, Dept Nursing, Goiania, Go, BrazilUniv Fed Uberlandia, Inst Biomed Sci, Microbiol, BR-38400 Uberlandia, MG, BrazilFundacao Oswaldo Cruz, Nucleo Vigilancia Hosp, Inst Nacl Saude Mulher Crianca & Adolescente Fern, Rio De Janeiro, BrazilUniv Fed Sao Paulo, Div Infect Dis, Sao Paulo, BrazilSpecial Clinical Microbiology Laboratory, Infectious Diseases Discipline, Federal University of São Paulo, São Paulo, BrazilDivision of Infectious Diseases, Federal University of São Paulo, São Paulo, BrazilCNPq: 563225/2010-6MCT/CNPq/CT-Saude/MS/SCTIE/DECIT: 40/2010.Web of Scienc

    Ciência, Crise e Mudança. 3.º Encontro Nacional de História das Ciências e da Tecnologia. ENHCT2012

    No full text
    III Encontro Nacional de História das Ciências e da Tecnologia. O Centro de Estudos de História e Filosofia da Ciência, organiza o 3.º Encontro Nacional de História da Ciência e da Técnica, sob o tema «Ciência, Crise e Mudança» que tem lugar na Universidade de Évora, nos dias 26, 27 e 28 de Setembro de 2012. O Primeiro Encontro Nacional de História da Ciência teve lugar em 21 e 22 Julho de 2009, no seguimento do programa de estímulo ao de¬senvolvimento da História da Ciência em Portugal e de valorização do património cultural e científico do País, lançado pelo Ministério da Ciência, Tecnologia e Ensino Superior (MCTES) em 31 de Janeiro desse ano. A sua organização coube a investigadores do Instituto de História Contemporânea (IHC), da FCSH da UNL, e do Centro Científico e Cultural de Macau (CCCM), em cujas instalações se realizou. De en¬tre as conclusões do Encontro, destacou-se a de realizar periodicamen¬te novos Encontros Nacionais, a serem organizados de forma rotativa por diferentes centros e núcleos de investigadores. Na sequência deste Primeiro Encontro, o Centro Interuniversitário de História das Ciências e da Tecnologia (CIUHCT) organizou, entre 26 e 28 de Julho de 2010, o II Encontro, dedicado ao tema “Comunicação das Ciências e da Tecnologia em Portugal: Agentes, Meios e Audiências”. Cabe agora ao CEHFCi cumprir o que foi decidido no final deste Encontro. Na situação económica e política que hoje vivemos torna-se particularmente urgente aprofundar o estudo e o debate sobre a interação entre a Sociedade, a Ciência e a sua História. Coordenação Científica e Executiva do encontro estiveram a cargo de dois investigadores CEHFCi: Maria de Fátima Nunes, José Pedro Sousa Dia
    corecore