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Search Results: 1 - 10 of 19724 matches for " Felipe Martins; "
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Desenvolvimento reprodutivo de Hyptis suaveolens (L.) Poit.: rela??o entre fotoperíodo, densidade celular meristemática e padr?o de express?o de um ortólogo putativo do gene LEAFY de arabidopsis
Martins, Felipe Terra;Polo, Marcelo;
Brazilian Journal of Botany , 2009, DOI: 10.1590/S0100-84042009000100013
Abstract: hyptis suaveolens (l.) poit. (lamiaceae) is a typical invasive plant that produces an essential oil with several biological properties. the largest essential oil content is found at the flowers. so, advances in the current knowledge about the h. suaveolens reproductive development are important when the essential oil productivity is sought. furthermore, the comprehension of the mechanisms involved in the h. suaveolens floral induction would be useful to clarify the adaptive responses in invasive plants. we here reported some h. suaveolens reproductive development features. the plants were grown at two photoperiodic treatments (natural photoperiod from alfenas, minas gerais, brazil and natural photoperiod extended of 16 h). samples of floral and vegetative aerial apices were taken at five different periods of time, for anatomical and scanning electron microscopic analysis, as well as in situ hybridization experiments, in order to detect the transcripts of a putative ortholog of arabidopsis thaliana leafy gene. hyptis suaveolens is a short day plant, with critical photoperiod nearby 13 h. the cell density has increased according to higher vegetative or floral meristem activities. the putative ortholog of leafy in h. suaveolens has shown an expression pattern similar to that reported in antirrhinum and arabidopsis, although it was also expressed in vegetative apices at the natural photoperiod plants. nevertheless, under extended natural photoperiod (16 h) no gene expression was detected in vegetative meristem. these results suggest a basal expression of leafy in h. suaveolens vegetative meristem, which is strongly decreased by extended day length conditions, or is increased under photoperiods lower than 13 h, when suitable levels are reached for floral determination.
O OUTRO, QUEM é ELE? CONSIDERA ES EM TORNO DA FENOMENOLOGIA DE HUSSERL, HEIDEGGER E LéVINAS
José Reinaldo Felipe Martins Filho
Griot : Revista de Filosofia , 2010,
Abstract: A proposta do presente artigo é apresentar, de modo sucinto, o papel que a figura do outro ocupa nas diferentes concep es filosóficas da contemporaneidade. Para tal, ser o eleitas as perspectivas de Husserl, Heidegger e Lévinas, como possíveis abordagens da quest o. Partindo da fenomenologia e atendo-se nos níveis da ontologia, poder-se-á compreender como se erige a proposta ética como autêntica possibilidade de abordagem da rela o entre os seres humanos. Tomando como base a alus o ao eu transcendental realizada na quinta medita o de Medita es Cartesianas, será possível perceber como a rela o com o outro em Husserl se estabelece como rela o entre eus. De modo distinto, partindo do parágrafo 26 de Ser e Tempo, ser o elencados os passos da analítica existencial em sua defini o da condi o essencial do Ser-no-mundo como Ser-com-os-outros; sempre tomando como base os pressupostos de uma ontologia fundamental. Em Heidegger, o outro é aquele que convive comigo num mesmo mundo circundante. Por fim, será apresentado o confronto com o pensamento levinasiano, o qual defende que somente nos níveis da ética se poderá definir a autêntica rela o com o outro, finalidade última de toda a existência humana; aqui, o outro é sempre outrem.
Precipita??o de carbonato de cálcio para aplica??o industrial
Oliveira, Felipe Ventura;Martins, Afonso Henriques;
Rem: Revista Escola de Minas , 2009, DOI: 10.1590/S0370-44672009000200008
Abstract: this work presents the experimental results for precipitated calcium carbonate (pcc) synthesis over a ground calcium carbonate (gcc) substrate. the parameters [ca]/[co3]t initial ratio, aqueous synthesis solution temperature, ph and coagulant concentration (edta) were investigated. the samples were characterized by scanning electron microscopy (sem), total carbon (toc), specific surface area (bet method), particle size distribution and visible light reflectance (to measure the brightness of the samples). the results were compared with values from standard samples used in the paper industry. according to the experimental results, it was noted that an increase in the edta amount added to the pulp favored pcc homo-coagulation and also increased the size of the coagulum. pcc tends to homo-coagulate between ph 10 and 11, while it tends to precipitate over gcc particles between ph 8 and 9. a decreasing of the material density was also observed. values found for specific surface area can be considered acceptable by paper and plastics industries.
The contribution of the entrepreneurial orientation to SMEs profitability: a contingent analysis that considers the environment role Contribución de la orientación emprendedora a la rentabilidad de las pymes: un análisis contingente considerando la función del entorno
Izaias Martins,Felipe Uribe,Diana Mesa
Ecos de Economía , 2012,
Abstract: This paper aims first to show the effect of the Entrepreneurial Orientation (EO) on SMEs financial performance, and second, to propose a contingency model which explores the moderating effects of environmental hostility of the relationship EO –financial performance. To examine the research hypotheses, a sample of 121 manufacturing SMEs located in Catalonia, Spain has been used. The results confirm a positive EO– financial performance relation, and suggest that a more positive relation exists when there is an adjustment between the EO and the environment. Finally, the academic and entrepreneurial implications related to the EO and the SMEs environment are presented and discussed. En este artículo se investiga el efecto de la orientación emprendedora (OE) en el desempe o financiero de la peque a y mediana empresa (pyme), así como una propuesta de un modelo de contingencias para explorar el efecto moderador de la hostilidad del entorno sobre la relación OE-desempe o financiero. Para examinar las hipótesis propuestas se ha utilizado información de 121 pymes pertenecientes a la industria manufacturera en Catalu a, Espa a. Los resultados confirman la influencia positiva de la OE sobre el desempe o financiero de las empresas, y de mayor importancia aun, la influencia es más positiva cuan- do existe un ajuste entre la OE y el entorno. Implicaciones para la academia y el mundo empresarial, con respecto a la OE en el contexto de la pyme, son presentadas y discutidas.
FREQUêNCIA DE GERMINA O DE SEMENTES DE CRAMBE (Crambe abyssinica Hochst.) SOB INFLUêNCIA DE TRATAMENTOS PRé-GERMINATIVOS E DE TEMPERATURAS
COSTA, Felipe Pianna,MARTINS, Lima Deleon Martins,LOPES, José Carlos
Nucleus , 2010,
Abstract: Biodiesel appears as a sustainable alternative to oil and its derivatives, because that productionis obtained from renewable sources such as oilseeds. The specie Crambe abyssinica has a structure calledpericarp. In some cases, the pericarp can cause high nonuniform germination in certain species or nogermination. Thus, the aim of this work is compare frequencies of germination in seeds of crambe on theinfluence of pre-germination treatments and temperatures. The statistical design used in the experiment was acompletely randomized design in factorial (3) chemical x (3) physical x (2) temperature treatments, fourrepetitions with 25 seeds per experimental unit. The treatments is chemical: (GA3), (KNO3) and (water);physical: intacts, scarified and dehulled; (2) temperature: 25oC and 30oC. Results showed that the dehulled seedsof crambe increase frequencies of germination in all of temperatures and chemical treatments.O biodiesel figura como uma alternativa sustentável ao petróleo e seus derivados, uma vez que suaprodu o é obtida de fontes renováveis como plantas oleaginosas. A espécie Crambe abyssinica possui umaestrutura tegumentar denominada pericarpo, o que pode, em alguns casos, ocasionar elevada desuniformidade ouaté mesmo ausência de germina o. Sendo assim, objetivou-se com o presente trabalho comparar freqüências degermina o em sementes de crambe sob influência de tratamentos pré-germinativos e de temperaturas. Odelineamento experimental utilizado foi o inteiramente casualisado, em esquema fatorial 3 x 3 x 2 (tratamentosquímicos x tratamentos físicos x temperaturas), em 4 repeti es de 25 sementes. Os tratamentos: (3) tratamentosquímicos: ácido giberélico (GA3), nitrato de potássio (KNO3) e água; (3) tratamentos físicos: semente intacta,escarificada e sem tegumento; (2) temperatura: 25oC e 30oC. As sementes de crambe descascadas apresentarammaiores freqüências de germina o, em ambas as temperaturas e tratamentos químicos.
Rare Diagnosis of Krukenberg Tumor: Intrahepatic Cholangiocarcinoma  [PDF]
Tiago Castello Branco Lyra, Fernando Morbeck, Marcos Duarte Guimar?es, Luiz Felipe Sias Franco, Edson Marchiori, Glaucio Siqueira, Carlos Chaves Faloppa, Felipe D'almeida Costa, Stephania Martins Bezerra
Open Journal of Medical Imaging (OJMI) , 2015, DOI: 10.4236/ojmi.2015.53020
Abstract: Krukenberg tumor is a rare ovarian metastatic cancer from the gastrointestinal tract. It accounts for 1%-5% of malignant tumors of the ovaries, usually being bilateral, of solid consistency and may have cystic areas. The World Health Organization (WHO) defined it as an ovarian metastasis when the mucus-secreting cells of “signet ring” are present, associated with sarcomatous stromal proliferation. We present a 58-year-old woman with the diagnosis of peripheric cholangiocarcinoma with ovarian metastasis, showing history of pain and increased abdominal volume. Magnetic Resonance Imaging (MRI) showed multiple hepatic solid nodules with predominantly peripheral, centripetal and progressive enhancement, demonstrating hipersignal and restriction on diffusion weighted imaging (DWI). In the anexial region, bulky heterogeneous multiloculated cystic formations with solid components, of probable ovarian origin, were noted. Biopsy of the liver nodules confirmed the diagnosis of cholangiocarcinoma.
Effect of Corrosion Inhibitor Used in Surface Treatment on the Anticorrosive Performance of an Epoxy Paint System  [PDF]
Jorge Felipe Ramos Pontes, Elber Vidigal Bendinelli, Cristina da Costa Amorim, Marcos Martins de Sá, Alberto Pires Ordine
Materials Sciences and Applications (MSA) , 2016, DOI: 10.4236/msa.2016.710049
Abstract: The mechanism of corrosion is mainly sustained by an electrochemical process, in which anodic and cathodic reactions take place, keeping their kinetics alive by electrons and ions fluxes. Several specific conditions can accelerate corrosion processes. When studying anticorrosive coatings, one of them is the contamination of metallic surface by soluble salts prior to coating, leading to premature failure of the paint system due to corrosion between the metallic surface and the coating. So the surface preparation step prior to coating is a procedure of great importance to the coating anticorrosive performance. The aim of this step is to clean the surface by removing visible and non-visible contaminants. Usually, wet abrasive blasting methods are the most efficient ones to achieve the latter objective, because they may clean the surface, create a surface roughness and also remove the non-visible contaminants, as they use water as a media. On the other hand, evaporation of water after blasting may create flash rust and to avoid this, it is common to use corrosion inhibitors in the water of wet blasting methods. In this paper, the use of sodium tetraborate (borax) as a corrosion inhibitor in wet abrasive blasting is discussed. Electrochemical measurements and mass loss tests show that a borax content of 1% in a saline solution has the best inhibitory action over carbon steel and zinc surfaces, allowing postponing for the painting step some time. However, residual borax left on the surface generated blistering and corrosion under coating, during accelerated corrosion test in a humidity condensation chamber. Electrochemical impedance spectroscopy confirmed that borax accelerated the permeation of water through the coating, downgrading the anticorrosive performance of the paint system.
Importancia do método de gota espessa de sangue no diagnóstico de filárias simpátricas no Amazonas, Brasil
Medeiros, Jansen F;Pessoa, Felipe Arley Costa;Martins, Marilaine;
Acta Amazonica , 2010, DOI: 10.1590/S0044-59672010000400020
Abstract: in this work, the visual diagnostic methods for human filarias in the blood are evaluated. the thick blood film method is more faithful to identify the microfilariae species if compared to policarbonate membrane filtration and knott methods, especially in areas where more than one species occur, as in amazon basin. slides with mansonella ozzardi microfilariae were mounted and photographed by different diagnosis methods. the thick blood film method is much easier to see the diagnostic morphological characters as cephalic and caudal space, pattern of nucleation of the tail and tail shape that can separate the blood amazonian microfilariae species.
Seletividade de herbicidas aplicados em pré-emergência sobre cultivares de batata
Felipe, José Munhoz;Martins, Dagoberto;Costa, Neumárcio Vilanova da;
Bragantia , 2006, DOI: 10.1590/S0006-87052006000400012
Abstract: the present research was carried out at the agricultural experimental station of basf s.a., located in the sp 340, highway km 144, santo antonio de posse, state of s?o paulo, on a dystrophic dark red latosol (rhodic haplustox) area, with medium texture. four experiments were carried out to evaluate the selectivity of the herbicides dimethenamid, metribuzin and linuron, applied at different rates, in the pre-emergence condition, in the production characteristics and quality of the tubers of four cultivars of potato (solanum tuberosum l.). in each experiment was used, a randomized block experimental design, with five replications and plots of 21 m2 (3 x 7 m). the treatments were: hand weeded, dimethenamid at rates of 0.75; 1.50 and 3.00 kg ha-1, metribuzin at 0.48 and 0.72 kg ha-1 and linuron at 1.50 and 2.00 kg ha-1. three visual injury evaluations were done at 24.31 and 42 days after aplication (daa). the severity of crop the injury in the different cultivars, was directly correlated with the herbicides, the rate applied and the potato cultivars. the herbicide dimethenamid at 3,00 kg ha-1 showed the highest percentage of leaf damage, although these symptoms disappeared completely at 42 daa. none herbicidal treatment interfered negatively in yield, dry matter content of the potatoes tuber, and in the final size of the potatoes tuber.
Uma heurística de trocas para o problema de sequenciamento de tarefas em processadores uniformes
Müller, Felipe Martins;Limberger, Sergio Jo?o;
Pesquisa Operacional , 2000, DOI: 10.1590/S0101-74382000000100005
Abstract: this paper examines the nonpreemptive assignment of independent jobs to a system of uniform processors with the objective of reducing makespan, or the time required from the start of execution until all jobs are completed. we consider a set of n jobs, each having an execution time and a set of m32 processors which are assumed to have different speeds (say s1 = 1£s2£ ... £sm). since the problem of finding a minimal makespan has been show to be np-hard, we develop a powerful interchange heuristic. the heuristic proposed is composed by three phases: initial assignment, job reassignment and job interchange. the main feature of this method is not perform a pre-classification of the tasks. some comparison are made with other heuristic schemes and a lower bound that validates the results obtained. the heuristic achieve optimal solutions for several instances in a short computational time.
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