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Search Results: 1 - 10 of 94239 matches for " Bruno Fernandes Dias da Silva "
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Rela es entre o Pre o Internacional do Petróleo e as A es da Petrobrás
Bruno Fernandes Dias da Silva,Otávio Ribeiro de Medeiros,Yuri Sampaio Maluf
Revista de Finan?as Aplicadas , 2012,
Abstract: O presente artigo tem por objetivo evidenciar a rela o econ mica entre o pre o das a es da Petrobrás e o pre o internacional do petróleo, bem como verificar a existência dos chamados efeitos lead-lag entre tais ativos. Para tal, utilizou-se a cota o do barril de petróleo representado pelo West Texas Intermediate – WTI – negociado na New York Mercantile Exchange – NYMEX – e as a es preferenciais da Petrobrás, transacionado na bolsa de valores de S o Paulo, BM&FBOVESPA. Para atingir estes objetivos, foram aplicadas regress es pelo método dos mínimos quadrados em dois estágios e modelagem GARCH, tanto com dados mensais quanto em alta frequência. A partir destes modelos foram testadas estratégias nas quais usufruem das defasagens entre os mercados. O estudo apontou para uma rela o contemporanea significante entre os mercados destes ativos. Também foi observada a presen a do efeito lead-lag identificados por ambas as metodologias, o que mostra certo grau de previsibilidade quanto ao pre o da a o da Petrobrás.
Genetic Parameters and Correlation between Tomato Late Blight Field Resistance and Fruit Quality  [PDF]
Carlos Nick, Jorge Gonzalez Aguilera, Bruno Soares Laurindo, Victor de Souza Almeida, Renata Dias de Freitas, Cosme Dami?o Cruz, Derly José Henriques da Silva
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.515255
Abstract:

The objective of this study was to estimate genetic parameters and quantify the correlations between late blight (LB) resistance and fruit quality traits in 220 families F2:3, under tropical field conditions. The families were arranged in randomized blocks in field trials, with six resistant inbred lines used as control, in plots of five plants. It evaluated the severity in the middle of the epidemy, final severity, area under the curve of progress of late blight, pH, total soluble solids, titratable acidity and flavor. There is genetic variability for epidemiological variables and total soluble solids. Heritabilities, obtained by parent-offspring regression, were high and indicated the possibility of satisfactory genetics gains and success in the introgression of resistance alleles. The correlations were negative, of high to intermediate magnitude, among the variables area under the curve of progress of late blight, total soluble solids and total titratable acidity.

Comparative Proteomics Reveals Set of Oxidative Stress and Thaumatin-Like Proteins Associated with Resistance to Late Blight of Tomato  [PDF]
Bruno Soares Laurindo, Renata Dias Freitas Laurindo, Patrícia Pereira Fontes, Camilo Elber Vital, Fábio Teixeira Delazari, Maria Cristina Baracat-Pereira, Derly José Henriques da Silva
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.94062
Abstract: Proteomics techniques were used to study the molecular mechanisms involved in the defense of tomato against late blight (Phytophthora infestans). Proteins were extracted from resistant access BGH-2127 and susceptible cultivar Santa Clara. Leaves of the inoculated and non-inoculated (control) genotypes were collected at 0, 2, and 48 h after inoculation and analyzed by two-dimensional electrophoresis (2-DE), followed by identification with mass spectrometry (MALDI TOF-TOF). A total of 56 differentially abundant proteins were identified, of which 39 were resistant genotypes and 17 were susceptible. These proteins were categorized into functional groups of energy and metabolism, photosynthesis, stress and defense, transcription, other proteins, and as un-characterized ones. For access BGH-2127, oxidative stress proteins (2-cis peroxiedoxin BAS1 and 2-cis peroxiredoxin) and thaumatin-like protein showed increase in the relative abundance at 0 and 48 h of inoculation, respectively, and were therefore considered important for the defense mechanism of this genotype. The expression standards evaluated by real-time PCR differed from the results of the proteomic analysis. The protein-protein interaction networks provided important information on the cellular activities involved in the resistance of BGH-2127 late blight.
Accelerating Algorithms using a Dataflow Graph in a Reconfigurable System
Jorge Luiz e Silva,Joelmir Jose Lopes,Bruno de Abreu Silva,Antonio Carlos Fernandes da Silva
Computer Science , 2011,
Abstract: In this paper, the acceleration of algorithms using a design of a field programmable gate array (FPGA) as a prototype of a static dataflow architecture is discussed. The static dataflow architecture using operators interconnected by parallel buses was implemented. Accelerating algorithms using a dataflow graph in a reconfigurable system shows the potential for high computation rates. The results of benchmarks implemented using the static dataflow architecture are reported at the end of this paper.
Morphology, Morphogenesis and Production of Tanzânia Grass, Submitted to Either Fixed or Variable Resting Period  [PDF]
Alberto Chambela Neto, José F. C. da Silva, Fermino Deresz, Alberto M. Fernandes, Bruno B. Deminicis, Ismail R. Haddade, Thiago L. Rosado
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.61019
Abstract: This work was carried out at Embrapa. Milk cattle and experimental field were located in Coronel Pacheco, MG, Brazil, in the period of December 2008 to May 2009. It was aimed to evaluate the effect of two different defoliation intervals on the morphology and morphogenetic characteristics of Tanzania grass (Urochloa maxima) pasture. The treatments consisted of evaluations of 2 management strategies on pastures were: 1) IL95—consisted of the entry of animals into the pickets when the pasture reached 95% of interception of photosynthetically active radiation, with 3 days of picket occupation and 2) FIXED—pasture managed with 30 days of defoliation interval and 3 days of picket occupation. Ten cows (Holstein × Zebu) recently delivered were used to effectuate the grazer of the evaluated areas. The measured variables were analyzed by the mist model. The best model selection was based on the Akaike information criterion, in which the likelihood was evaluated for the different proposed models, where the composed symmetry had the better adjustment to the model. The management caused differences on the biomass production and on the morphological and morphogenetic structure of Tanzania grass, in which the criterion of interception of photosynthetically active radiation allowed higher efficiency on the area usage.
Prioriza o dos Critérios Competitivos das Opera es Baseado nos Recursos Estratégicos
Tania Nunes da Silva,Marcelo Fernandes Pacheco Dias,Silvio Santos Junior,Nadir Paula da Rosa
Contextus , 2011,
Abstract: Na literatura da área de estratégia de opera es, os critérios competitivos devem ser priorizados tendo como referência a sua importancia para os clientes. Nesse sentido, foi realizada a revis o da literatura sobre os temas análise estratégica de opera es e teoria baseada em recursos, visando um melhor entendimento de como os recursos estratégicos se associam aos critérios competitivos. Dessa revis o, foi proposto um framework de análise, pré-testado em duas empresas de Canoas-RS. Durante essa etapa realizou-se observa es diretas nas empresas, além de entrevistas. Os resultados mostram que um recurso específico pode contribuir para vários critérios competitivos, n o havendo uma rela o específica entre um recurso estratégico e um critério competitivo em particular.
Anaphylatoxins: From Supposed Toxin Anaphylactics to Effective Mediators of the Early Events of Inflammation  [PDF]
Wilmar Dias da Silva
Open Journal of Veterinary Medicine (OJVM) , 2012, DOI: 10.4236/ojvm.2012.24043
Abstract: This review updates original data describing the experiments showing the complement origin of anaphylatoxins unexplainable submerged under the surface of the articles related to the subject. Next, recalls subsequent data describing the anaphylatoxins peptide nature and sequences, the cell receptors with which they interact and activate and the outcome of the cell responses. The review continues by highlighting the anaphylatoxin biological properties focusing on the unequivocal participation of these mediators in inflammation. The review concludes bringing data reinforcing the promising use of these peptides as molecular primers to create specific and efficient pharmacological antagonists.
Uso de geomantas no controle da eros?o superficial hídrica em um talude em corte de estrada
Fernandes, Leonardo Silva;Griffith, James Jackson;Fonseca, Dilermando Miranda da;Dias, Luiz Eduardo;Ruiz, Hugo Alberto;
Revista Brasileira de Ciência do Solo , 2009, DOI: 10.1590/S0100-06832009000100021
Abstract: considering that brazil and many other countries with tropical ecosystems need to enhance methods of embankment cover, it is necessary to study the enhancement of available erosion control means. the study objective was to evaluate the efficiency of three commercial erosion mats: macmat?, fibrax? and tela biotêxtil? in rainfall surface erosion protection. the experiment was carried out between december 2003 and march 2004 on an embankment of a road section in vi?osa, minas gerais state, brazil. surface runoff from the experimental area was analyzed based on eight rainfall events and data of the following variables: solid mass and volume of suspended soil + water runoff. these data were compared in relation to geotextiles with or without vegetation (a mixture of grass and legume species). the treatments were: treatment 1 - control (exposed soil); treatment 2 - tela biotêxtil? with plants; treatment 3 - macmat? without plants; treatment 4 - macmat? with plants; treatment 5 - fibrax? without plants and treatment 6 - fibrax? with plants. the tukey test was used at 5% for the statistical analysis. although no significant differences were found among treatments due to the high variation coefficient, it was obvious that erosion mats generally reduce soil loss. treatment 6 was the most efficient. the volume of suspended soil + water runoff was however highest in treatment 5 (mat without plants). the erosion mats enhanced soil protection against surface erosion by rainwater; vegetation planting along with the mats improved results for all treatments.
Corre??o de aneurisma de aorta abdominal em paciente com dois rins pélvicos
Silva, Luís Felipe da;Fernandes, André Luiz;Mendes, Warley Dias Siqueira;
Revista do Colégio Brasileiro de Cirurgi?es , 2005, DOI: 10.1590/S0100-69912005000100014
Abstract: abdominal aortic aneurysm reconstruction is usually performed in vascular surgical practice. however, the repair of an abdominal aortic aneurysm associated with a pelvic kidney is rare. our goal is to present a case report of an abdominal aortic aneurysm associated with two congenital pelvic kidneys wich was treated successfully by aneurysmectomy and inclusion of an aortoaortic graft.
Mudan?a ambiental e reorienta??o estratégica: estudo de caso em institui??o bancária
Machado-da-Silva, Clóvis L.;Fernandes, Bruno H. Rocha;
Revista de Administra??o de Empresas , 1998, DOI: 10.1590/S0034-75901998000400006
Abstract: recent research has demonstrated that successful organizations tend to have difficulties in promptly reorienting their strategies in facing new environmental circumstances. in a general view, changes that imply organizational strategic reorientation are postponed until crisis occurrence, when the best moment for fundamental changes has already gone. the present study focuses this problematical challenge by means of analysis of brazilian plano real impact on bamerindus banking organization. this longitudinal analysis simultaneously descriptive and qualitative comprehends january 1992-december 1996 period.
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