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Search Results: 1 - 10 of 238419 matches for " Francisco Ricardo;Pádua "
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Eficácia do adefovir dipivoxil, entecavir e telbivudina para o tratamento da hepatite cr?nica B: revis?o sistemática
Almeida, Alessandra Maciel;Ribeiro, Andréia Queiroz;Pádua, Cristiane Aparecida Menezes de;Brand?o, Cristina Mariano Ruas;Andrade, Eli I?la Gurgel;Cherchiglia, Mariangela Leal;Carmo, Ricardo Andrade;Acurcio, Francisco de Assis;
Revista da Sociedade Brasileira de Medicina Tropical , 2010, DOI: 10.1590/S0037-86822010000400021
Abstract: introduction: chronic hepatitis b is one of the most frequent infectious disease in the world and represents a serious problem of public health methods: a systematic review of randomized clinical trials was conducted to evaluate the efficacy of the nucleoside/nucleotide analogues (adefovir, entecavir and telbivudine) used for the treatment of chronic hepatitis b. the databases pubmed and lilacs were consulted, among others results: twenty nine articles published between january/1970 to december/2009 were selected conclusions: all nucleoside/nucleotide analogues demonstrate upper or similar efficacy to lamivudine. the entecavir can be appropriate for patients with chronic hepatitis b, hbeag positive and negative treatment-naive as alternative to lamivudine, considering its low potential of viral resistance. the addition of adefovir to lamivudine presented good results in lamivudine resistant patients. the use of entecavir and telbivudine in those patients presents risk of crossed resistance. tbv is one of the most recent antivirals available, but antiviral resistance already documented represents limitation to its use as therapeutic option to lam. adverse events of nucleoside/nucleotide analogues were similar in characteristics, gravity and incidence when compared to the lamivudina and placebo.
The nature of heat: after two centuries, will it be that the caloric theory is still in some way an attractive idea or, even, useful?
Ant?nio Bráz de Pádua,Cléia Guiotti de Pádua,Ricardo Spagnuolo Martins
Semina : Ciências Exatas e Tecnológicas , 2009,
Abstract: In the beginning of the 19th Century, there were two theories absolutely different on the nature of the heat: the Mechanical Theory of the Heat and the Caloric Theory. For the first theory, heat was considered as ‘a vibration’ of the atoms that compose the matter. Thus, the temperature represented the intensity of those vibrations and their propagation was a transfer of heat. When two bodies of different temperatures were put in contact, the atoms of the hottest body communicated part of its vibrations to that of the coldest body by means of collisions until the atoms of both bodies vibrated with the same intensities. For the second theory, the heat was considered a subtle fluid that filled the interior of the bodies. Spread all over the nature, that fluid was propagated or conserved by the bodies according to their properties and temperatures. Before being replaced by the conception of heat as a form of energy, in the middle of the 19th Century, the Caloric Theory reached great successes with the works of Jean-Baptiste Fourier (1768 – 1830) in 1822, Sadi Carnot (1796 – 1832), in 1824 and émile Clapeyron (1799 – 1864) in 1834. By means of a careful revision of the analytic results of Clapeyron, developed under the basis of the Caloric Theory, we propose in this work to re-adapt these results and to compare them with current experimental data and theories, and to show that we can still understand some characteristics of the thermal phenomena, without considering heat as a form of energy. Especially in the study of the gases, we could obtain objective and precise information about absorption and liberation of heat in the isothermal processes, efficiency of the thermal machine of Carnot and the relationship among specific heats.
Preliminary characterization of Psidium germplasm in different Brazilian ecogeographic regions
Santos, Carlos Antonio Fernandes;Castro, José Mauro da Cunha e;Souza, Flavio de Fran?a;Vilarinho, Aloísio Alcantara;Ferreira, Francisco Ricardo;Pádua, Juliano Gomes;Borges, Rita Mércia Estigarribia;Barbieri, Rosa Lia;Souza, Aparecida das Gra?as Claret de;Rodrigues, Marciene Amorim;
Pesquisa Agropecuária Brasileira , 2008, DOI: 10.1590/S0100-204X2008000300020
Abstract: the objective of this work was to characterize 119 accessions of guava and 40 accessions of "ara?á" sampled in 35 brazilian ecoregions, according to the international union for the protection of new varieties of plants (upov) descriptors. the majority of "ara?á" accessions presented wide spacing of leaf veins, while guava accessions presented medium to close spacing. most fruits of "ara?á" accessions were classified as small, contrasting with medium to large fruits of guava accessions. most of "ara?á" accessions (91%) presented white flesh fruit color, while 58% of guava accessions presented pale pink, pink and dark pink colors. fruit differences among wild and cultivated psidium species indicate fruit as the most altered trait under artificial selection.
Análise florística e estrutural do componente arbustivo-arbóreo de uma floresta de galeria no Município de Cristais Paulista, SP, Brasil
Teixeira, Aloysio de Pádua;Rodrigues, Ricardo Ribeiro;
Acta Botanica Brasilica , 2006, DOI: 10.1590/S0102-33062006000400006
Abstract: the floristic composition of forest remnants in northeastern s?o paulo, brazil, is still poorly reported. a floristic and phytosociological survey of a gallery forest in cristais paulista municipality was carried out to characterize the flora and compare it to other riverine forests. the phytosociological aspects of the remnant were obtained by the point-centered quarter technique in four transects running parallel to the river bed, considering 90 points, equidistant ten meters, and sampling all individuals with pbh > 15 cm. all fertile specimens not included in the phytosociological sample were also identified. a total of 68 species and 37 families were found, with 53 species and 34 families reported in the phytosociological survey. the species diversity index (h') was 3.17 nats individual-1 and the most important species (iv) were virola sebifera, protium heptaphyllum, tapirira guianensis and copaifera langsdorffii. comparison to other riverine forests showed greater floristic similarity with those found throughout the rio grande basin, possibly because of similar climates, and with forest remnants throughout central brazil due to the drainage network that provides a migratory route for the plant species. many "cerrado" (brazilian savanna) species were found in the gallery forest and this fact reinforces the role played by brazilian savanna vegetation in the biodiversity of gallery forests.
Método de avalia??o do modelo de processos de negócio do Enterprise Knowledge Development
Pádua, Sílvia Inês Dallavalle de;Inamasu, Ricardo Yassushi;
Gest?o & Produ??o , 2008, DOI: 10.1590/S0104-530X2008000300011
Abstract: the ekd - enterprise knowledge development - is a methodology that offers a systematic and guided process to analyze, understand, develop, and document an enterprise. unfortunately, its grammatical structure and context formation are not clear nor easy to understand and interpret making the analyses of more complex models difficult. as a result, the enterprise process model of ekd can be ambiguous and hard to analyze, especially regarding more complex systems, and so it can also be difficult to verify the consistency and entireness the model. in this work, these problems will be studied based on the petri nets approach. due to the petri nets formalism, this is an important modeling technique to process representation. furthermore, petri nets allows the tracking of every step of the operation with no ambiguity, and it offers efficient methodology for the analyses, which can guarantee the accuracy of the model. therefore, the objective of this study is to develop an evaluation methodology of the business process model of ekd (mpn-ekd). such methodology will allow the verification of possible building and locking model errors. this methodology can be applied to information systems or workflow. it can also be used to study strategies of work and workflow simulations.
Mapeamento do modelo de processos de negócio do EKD em redes de Petri
Pádua, Silvia Inês Dallavalle de;Inamasu, Ricardo Yassushi;
Produ??o , 2008, DOI: 10.1590/S0103-65132008000200005
Abstract: the ekd - enterprise knowledge development - is a methodology that gives a systematic and controlled way to analyze, understand, develop, and document an enterprise. unfortunately it doesn't have syntax neither a semantic well defined, which doesn't help on more complex analyses of the models. as a result, the enterprise process model of ekd can be ambiguous and hard to analyze, especially on more complex systems, and also it is not possible to verify the consistency and entireness of the model. on this paper, these problems will be studied under an approach based on petri nets. this work has the objective to develop a mapping of the business process model of ekd. such mapping will make possible the verification of possible building and locking model errors.
Gerenciamento de riscos na prática ortod?ntica: como se proteger de eventuais problemas legais
Cruz, Ricardo Machado;Chaves Cruz, Carla Pádua Andrade;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2008, DOI: 10.1590/S1415-54192008000100015
Abstract: introduction: the professional relationship between the orthodontist and his patient is very consuming due to the long duration of clinical treatments. frequently this relationship can be deteriorated causing damages to both sides. aim: this paper aims to inform the reader, in an accessible language, about the main juridical problems that can involve the orthodontist in his practice, in the field of civil, criminal and labor law. methodology: this paper draws the outline of professional activity in orthodontics, analyses obligations and rights of both orthodontists and patients and establishes some concepts of risk management that should be incorporated to the clinical practice. results and conclusion: besides technically good and scientifically based work, orthodontists should know how to avoid legal problems. this paper can be an important tool for the establishment of a new clinical and administrative routine that can be safer as far as juridical aspect is concerned.
Oil glands in the Neotropical genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)
Teixeira, Simone de Pádua;Rocha, Joecildo Francisco;
Brazilian Journal of Botany , 2009, DOI: 10.1590/S0100-84042009000100006
Abstract: dahlstedtia pentaphylla (taub.) burkart and d. pinnata (benth.) malme belong to the millettieae tribe and are tropical leguminous trees that produce a strong and unpleasant odour. in the present work, we investigated the distribution, development and histochemistry of foliar and floral secretory cavities that could potentially be related to this odour. the ultrastructure of foliar secretory cavities were also studied and compared with histochemical data. these data were compared with observations recorded for other species of millettieae in order to gain a phylogenetic and taxonomic perspective. foliar secretory cavities were only recorded for d. pentaphylla. floral secretory cavities were present in the calyx, wings and keels in both species; in d. pinnata they also were found in bracteoles and vexillum. such structures were found to originate through a schizogenous process. epithelial cells revealed a large amount of flattened smooth endoplasmic reticula, well-developed dictyosomes and vacuoles containing myelin-like structures. cavity lumen secretion stains strongly for lipids. features of the secretory cavities studied through ultrastructural and histochemical procedures identify these structures as oil glands. thus, if the odour produced by such plants has any connection with the accumulation of rotenone, as other species belonging to the "timbó" complex, the lipophilic contents of the secretory cavities of dahlstedtia species take no part in such odour production. the presence, distribution patterns and frequencies of secretory structures in dahlstedtia are taxonomically significant and may be utilized as a diagnostic character which justifies the separation of this genus into two species.
Classical or equilibrium thermodynamics: basic conceptual aspects
Antonio Braz de Pádua,Cléia Guiotti de Pádua,Jo?o Lucas Correia Silva,Ricardo Spagnuolo Martins
Semina : Ciências Exatas e Tecnológicas , 2008,
Abstract: The Classical or Equilibrium Thermodynamics is one of the most consolidated fields of Physics. It is synthesized by a well-known and self coherent knowledge structure. The essence of the Classical Thermodynamics theoretical structure consists of a set of natural laws that rule the macroscopic physical systems behavior. These laws were formulated based on observations generalizations and are mostly independent of any hypotheses concerning the microscopic nature of the matter. In general, the approaches established for the Classical Thermodynamics follow one of the following alternatives: the historical approach that describes chronologically the evolution of ideas, concepts and facts, and the postulational approach in which postulates are formulated but are not demonstrated a priori but can be confirmed a posteriori. In this work, a brief review of the pre-classical historical approach conceptual evolution is elaborated, from the beginning of the seventeenth century to the middle of the nineteenth century. As for this, the following themes are dealt with in an evolutionary and phenomenological way: heat nature, thermometry, calorimetry, Carnot’s heat engine, heat mechanical equivalent and the first and second laws. The Zeroth law that was formulated afterwards is included in the discussion.
Conducta gobernada por la regla y ejecución en un proceso de discriminación I. Aproximación al problema
Ricardo Pérez,Francisco Pereira
Revista Latinoamericana de Psicología , 1986,
Abstract: The study of mediational (cognitive) processes using the experimental paradigms proposed by Kendler and his collaborators, has been very fructiful. A review of this approach is presented, Intra.dimensional and inter.dimensional shifts are analized. Rule-governed behavior is investigated in comparison with contingencies-shaped behavior, Sorne experiments are critized in this context
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