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Search Results: 1 - 10 of 241845 matches for " Ana Maria de Britto;Teixeira "
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Colabora??o nas atividades de pesquisa desenvolvimento e inova??o: o que nos ensina o Modelo de Centros e Redes de Excelência Petrobras / COPPE UFRJ?
Pires, Ana Maria de Britto;Teixeira, Francisco Lima Cruz;Hastenreiter Filho, Horacio Nelson;
Organiza??es & Sociedade , 2012, DOI: 10.1590/S1984-92302012000300008
Abstract: the complexity of the technological innovation process in knowledge intensive activities has led to the emergence of new collaborative arrangements and new business models to deal with research, development and innovation (rd) activities. this article presents an evaluation of the prática centros e redes de excelência petrobras/coppe (pcrex) in the light of the following research topics: triple helix, open innovation, university-industry relations and innovation networks. the pcrex model proposes the establishment of new permanent interorganizational agencies aimed at the development of specific knowledge areas. the study of the method is based on the case study of the petrobras center of excellence in geochemistry (cegeq), the prototype of the application of the method set up in 1996. the research revealed the fine alignment of the pcrex with the triple helix and the open innovation models of innovation, which confirms its high potential to leverage the innovation process. however, it also highlighted cegeq's difficulties to fully realize this potential. the case study identified the need to improve the capacity of engaging and coordinating networks and to advance in the development of an institutional environment which favors the practice of collaboration in the pcrex mode. the research also revealed that the adoption of the pcrex model for the management of rd activities is a strategic decision and therefore must the aligned with the corporate strategy.
Colabora o nas atividades de pesquisa desenvolvimento e inova o: o que nos ensina o modelo de centros e redes de excelência Petrobrás / Coppe UFRJ?
Ana Maria de Britto Pires,Francisco Lima Cruz Teixeira,Horacio Nelson Hastenreiter Filho
Organiza??es & Sociedade , 2012,
Abstract: A complexidade do processo de inova o tecnológica em atividades intensivas em conhecimento vem provocando o surgimento de novos arranjos colaborativos e novos modelos de negócio para as atividades de pesquisa, desenvolvimento e inova o (PD&I). Este artigo apresenta uma avalia o da Prática Centros e Redes de Excelência Petrobras/Coppe (PCREX) à luz dos referenciais teóricos da Hélice Tríplice, Inova o Aberta, Rela o Universidade-Empresa e Redes de Inova o. O modelo PCREX prop e a constru o de novos organismos interorganizacionais permanentes, voltados ao desenvolvimento de áreas específicas do conhecimento. A análise da PCREX é aprofundada pelo estudo de caso do Centro de Excelência em Geoquímica da Petrobras (Cegeq), protótipo da aplica o da PCREX, institucionalizado em 1996. A pesquisa revelou o total alinhamento da PCREX com as abordagens da Hélice Tríplice e da Inova o Aberta, o que confirma seu potencial dinamizador do processo de inova o; porém, apontou dificuldades na realiza o desse potencial no caso Cegeq. O estudo de caso evidenciou a necessidade de se avan ar no desenvolvimento da capacidade de atuar em redes de colabora o e na constru o de ambientes institucionais favoráveis ao exercício da colabora o nos moldes PCREX. A pesquisa revelou, ainda, que a ado o do modelo PCREX para a gest o das atividades de PD&I é uma decis o estratégica que precisa estar alinhada com a estratégia corporativa. ----- Collaboration on Research, Development and Innovation Activities: what can be learnt from the Petrobras/Coppe UFRJ model of Centers and Networks of Excellence? ----- ABSTRACT ----- The complexity of the technological innovation process in knowledge intensive activities has led to the emergence of new collaborative arrangements and new business models to deal with research, development and innovation (RD&I) activities. This article presents an evaluation of the Prática Centros e Redes de Excelência Petrobras/Coppe (PCREX) in the light of the following research topics: Triple Helix, Open Innovation, University-Industry Relations and Innovation Networks. The PCREX model proposes the establishment of new permanent interorganizational agencies aimed at the development of specific knowledge areas. The study of the method is based on the case study of the Petrobras Center of Excellence in Geochemistry (Cegeq), the prototype of the application of the method set up in 1996. The research revealed the fine alignment of the PCREX with the Triple Helix and the Open Innovation models of innovation, which confi rms its high potential to leverage the
Sobrevida em pacientes com cancer gástrico em Campinas, S o Paulo, Brasil
Bustamante-Teixeira Maria Teresa,Faerstein Eduardo,Mariotto ?ngela,Britto Anna Valéria de
Cadernos de Saúde Pública , 2006,
Abstract: Neste estudo, analisa-se a sobrevida de pacientes diagnosticados com cancer gástrico no Município de Campinas, S o Paulo, Brasil. Foram analisados os dados do Registro de Cancer de Base Populacional (RCBP) de Campinas referentes aos casos incidentes nos anos de 1991 a 1994. Calculou-se a sobrevida observada e relativa e, visando a uma compara o entre as taxas de sobrevida de diferentes grupos e popula es internacionais, utilizou-se o risco relativo de morte. A sobrevida relativa foi de 33% e 9% ao final do primeiro e do quinto ano após o diagnóstico, respectivamente. N o foi constatada diferen a na sobrevida por cancer de est mago entre os sexos; o prognóstico revelou-se melhor para os indivíduos mais jovens. Verificou-se um gradiente de gravidade dos estádios localizados para aqueles mais avan ados, n o estatisticamente significantes. O grupo dos adenocarcinomas indiferenciados apresentou uma sobrevida maior, com 47% destes pacientes vivos ao final do primeiro ano, enquanto apenas 7% dos casos sem classifica o histológica sobreviveu ao primeiro ano após o diagnóstico. Comparando-se com resultados internacionais, tais como os de registros europeus, Campinas revelou um risco de morte maior do que o da média dos registros europeus, especialmente considerando-se o quinto ano após o diagnóstico.
Sobrevida em pacientes com cancer gástrico em Campinas, S?o Paulo, Brasil
Bustamante-Teixeira, Maria Teresa;Faerstein, Eduardo;Mariotto, ?ngela;Britto, Anna Valéria de;Moreira Filho, Djalma de Carvalho;Latorre, Maria do Rosário Dias de Oliveira;
Cadernos de Saúde Pública , 2006, DOI: 10.1590/S0102-311X2006000800009
Abstract: this study analyzes the survival of gastric cancer patients in the city of campinas, s?o paulo state, brazil. data from the campinas population-based cancer registry (rcbp) related to gastric cancer cases diagnosed from 1991 to 1994 were analyzed. observed and relative survival rates were calculated, and to compare rates between different groups and international populations, the relative mortality risk was used. one-year relative survival rate for patients with gastric cancer was 33%, and five-year relative survival was 9%, confirming the poor prognosis of gastric cancer. gender had no influence on survival, while the prognosis was better for young people. there was a gradient of severity from the localized to the metastatic state, not statistically significant. the group with undifferentiated adenocarcinomas had longer survival, with 47% of patients alive after the first year, whereas only 7% of those without a histological classification survived the first year after diagnosis. compared with international results like the pool of european registries, the risk was greater, especially considering the five-year survival rates.
Epistaxe de origem extranasal: desafio diagnóstico Extranasal epistaxis: a diagnostic challenge
Daniela Oliveira Teixeira,Luiz Carlos Alves de Oliveira,Enedir Borges Teixeira,Ana Maria Benvegnú
Brazilian Journal of Otorhinolaryngology , 2012, DOI: 10.1590/s1808-86942012000200021
Abstract:
Essential Oils from Lippia origanoides Kunth. and Mentha spicata L.: Chemical Composition, Insecticidal and Antioxidant Activities  [PDF]
Maria Luisa Teixeira, Maria das G. Cardoso, Ana Cristina S. Figueiredo, Jair C. Moraes, Franscinely A. Assis, Juliana de Andrade, David L. Nelson, Marcos de Souza Gomes, Josefina Aparecida de Souza, Luiz Roberto Marques de Albuquerque
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.59131
Abstract:

This work describes the chemical composition of the essential oils extracted from fresh leaves of Lippia origanoides Kunth. and Mentha spicata L. and their antioxidant and insecticidal activities. The essential oils were extracted by steam distillation using a modified Clevenger apparatus and subsequently analyzed by gas chromatography-flame ionization detector and gas chromatography-mass spectrometry. The antioxidant activities were determined by the β-carotene-linoleic acid method and by sequestration of the 2,2-diphenyl-1-picryl-hidrazila radical. The concentrations of the essential oils and the synthetic standard, butylated hydroxyltoluene, were 25, 50, 100, 150, 200, 250, 300 and 500 μg mL-1. Insecticidal activity was analyzed by non-preference with choice and no choice against the aphid Myzus persicae Sulzer. Gas chromatography analysis of the essential oil from Lippia origanoides Kunth. revealed carvacrol (41.51%), p-cymene (18.36%), γ-terpinene (17.03%) and thymol (4.86%) as major constituents, and the essential oil from Mentha spicata L. contained piperitona (81.18%), piperitenone (14.57%) and limonene (1.47%) as the principal components. The essential oils and the standard exhibited dose-dependent antioxidant activities at the concentrations tested. The essential oils were shown to be potential agents in the integrated management of the aphid

Investigation of sintered cobalt-zinc ferrite synthesized by coprecipitation at different temperatures: a relation between microstructure and hysteresis curves
Teixeira, Ana Maria Rangel de Figueiredo;Ogasawara, Tsuneharu;Nóbrega, Maria Cecília de Souza;
Materials Research , 2006, DOI: 10.1590/S1516-14392006000300003
Abstract: the magnetic properties of sintered samples of cobalt-zinc ferrites produced from the corresponding coprecipitate were calculated based on hysteresis curves (hc). the hc values confirmed that soft ferrites were obtained by the procedure. a possible relation between the magnetic hysteresis curves and the microstructure of the sintered samples was investigated. x ray diffraction, thermal analysis and scanning electron microscopy were used to characterize the microstructure and the phases present in the sintered ceramic pieces, as well as those of their coprecipitated tri-metallic hydroxide precursor powders. it was found that sintering of co0.5zn0.5fe2o4 at 1400 °c led to "honeycombing" of the ferrite grains and that there was no single phase in the microstructure of a sample sintered at 1400 °c. thus, a more complete study was made of the behavior of the microstructure at lower sintering temperatures, i.e., in the 1100-1350 °c range.
Chemical Characterization and Application of the Essential Oils from Chenopodium ambrosioides and Philodendron bipinnatifidum in the Control of Diabrotica speciosa (Coleoptera: Chrysomelidae)  [PDF]
Juliana de Andrade Santiago, Maria das Gra?as Cardoso, Ana Cristina da Silva Figueiredo, Jair Campos de Moraes, Franscinely Aparecida de Assis, Maria Luisa Teixeira, Wilder Douglas Santiago, Thaís Aparecida Sales, Karen Caroline Camargo, David Lee Nelson
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.526417
Abstract: The compositions of essential oils from Chenopodium ambrosioides L. and Philodendron bipinnatifidum Schott were determined, and the their potential effects on the nutrition and mortality of Diabrotica speciosa were studied. The extraction of the oils was performed by hydrodistillation (2 h) using a modified Clevenger apparatus and the oils were subsequently subjected to analysis by gas chromatography/flame ionization detector (CG/FID) and gas chromatography/mass spectrometry (GC-MS). A completely randomized design with five treatments and four replications was adopted. The bean plants were sprayed with solutions of the oils dissolved in aqueous Tween 80 solutions at concentrations of 0 (water + Tween 80), 0.5%, 1.0%, 1.5% and 2.0% and then furnished to the insects with no choice available. Seven days after the application, the percentage of leaves with injury, degree of defoliation, the preference index for consumption and the percent of mortality of insects were evaluated. Neither of the essential oils caused a reduction in foliar injury, but antifeeding activity was observed, causing reduced feeding and increasing the mortality of adult D. speciosa insects.
Influence of Maternal Height and Weight on Low Birth Weight: A Cross-Sectional Study in Poor Communities of Northeastern Brazil
Revilane Parente de Alencar Britto, Telma Maria Toledo Florêncio, Ana Amelia Benedito Silva, Ricardo Sesso, Jairo Calado Cavalcante, Ana Lydia Sawaya
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0080159
Abstract: Background Low birth weight (LBW) is associated with an increased risk of mortality, adverse metabolic conditions, and long-term chronic morbidities. The relationship between LWB and short maternal stature coupled with nutritional status was investigated in poor communities. Methods/Principal Findings A cross-sectional population-based study involving 2226 mother-child pairs was conducted during the period 2009-2010 in shantytowns of Maceió, Alagoas, Brazil. Associations between LBW and maternal sociodemographics, stature and nutritional status were investigated. The outcome variable was birth weight (< 2500g and ≥ 2500g). The independent variables were the age, income, educational background, stature and nutritional status (eutrophic, underweight, overweight and obese) of the mother. The frequency of LBW was 10%. Short-statured mothers (1st quartile of stature ≤ 152cm) showed a tendency of increased risk of LBW children compared to mothers in the 4th quartile of stature (>160.4cm) (OR: 1.42, 95% CI: 0.96 - 1.09, p = 0.078). Children from short-statured mothers weighed an average of 125g less than those from taller mothers (3.18±0.56kg vs. 3.30±0.58kg, respectively p = 0.002). Multivariate analyses showed that short stature, age < 20y (OR: 3.05, 95% CI:1.44 - 6.47) or were underweight (OR: 2.26, 95% CI:0.92 - 5.95) increased the risk of LBW, while overweight (OR: 0.38, 95% CI:0.16 - 0.95) and obesity (OR: 0.39, 95% CI:0.11 - 1.31) had lower risk for LBW. In taller mothers, lower income and underweight were associated with LBW (OR: 1.88, 95% CI: 1.07 - 3.29 and 2.85, 95% CI:1.09 - 7.47, respectively), and obese mothers showed a trend of increased risk of LBW (OR: 1.66, 95% CI:0.84 - 3.25). Conclusions/Significance Overweight was found to have a protective effect in short-statured mothers, indicating that a surplus of energy may diminish the risk of LBW. Short-statured younger mothers, but not taller ones, showed higher risk of LBW. The mother being underweight, regardless of stature, was associated with LBW.
Uso de métodos anticoncepcionais e adequa??o de contraceptivos hormonais orais na cidade de Pelotas, Rio Grande do Sul, Brasil: 1992 e 1999
Dias-da-Costa, Juvenal Soares;Gigante, Denise Petrucci;Menezes, Ana Maria Baptista;Olinto, Maria Teresa Anselmo;Macedo, Silvia;Britto, Marcelo Alexandre Pinto de;Fuchs, Sandra Costa;
Cadernos de Saúde Pública , 2002, DOI: 10.1590/S0102-311X2002000100010
Abstract: a cross-sectional study was conducted to assess contraceptive methods and the adequacy of oral contraceptive use by women aged 20 to 49 years in the city of pelotas. the results were compared with another cross-sectional study performed in 1992. a sample was randomly selected, including 766 women aged 20 to 49 years. some 495 of the sample (64.6%) used a contraceptive method, in the following order: oral contraceptives (55.4%), surgical sterilization (22.2%), condoms (10,5%), and iud (7.7%). among users of oral contraceptives, 62 (22.2%) had some contraindication. incorrect use of contraceptive methods was associated with age but not with socioeconomic status. as compared to the previous study, there was a reduction in the use of oral contraceptives. meanwhile, other methods such as surgical sterilization, condoms, and iud were used more frequently than in 1992.
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