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Search Results: 1 - 10 of 31095 matches for " Bruno Moreira Carvalho "
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Cecilia Nunes Moreira,Vera Lúcia Banys,Bruno Carvalho Rosa,Antonio Silva Pinto
Ciência Animal Brasileira , 2009,
Abstract: Great percentage of brazilian beef cattle is reared forage based diets, often using high density systems. This contributes for appearance of diseases, amongst such as hepatogenous photosensitivity, whose the ethiology has been under constant debate. This work aims to evaluate the amount of spores of Pithomyces chartarum fungus, the saponine amount in the grasses and the performance of cattle fed Brachiaria or Andropogon grass. 50 Nellore bulls were divided into two groups of 25 animals and each group fed one of the two types of grasses (Brachiaria or Andropogon). They were weighed from weaning to slaughter. The animals fed with Andropogon grass showed better performance especially during the dry season. The carcass dressing revealed a significant difference (p<0.05), respectively, with an average (54.9%) for the Andropogon-fed animals and (53.13%) for the animals feeding Brachiaria. The Brachiaria grass revealed greater saponine concentrations (0.03% to 1.09%) when compared to the Andropogon grass (0.02% to 0.17%). Both types of grass presented approximate average values of P. chartarum with counts varying between 0 to 50000 spores/g of pasture. It was concluded even both types of grasses had spores of P. chartarum and presented protodyosin saponins, the better animal performance was observed in animals fed with Andropogon grass. KEY WORDS: Nelore, sporisdesmin, tropical grasses, weight gain. A maior parte do rebanho bovino brasileiro de corte é criado em pastagens, muitas vezes em elevadas taxas de lota o. Isso contribui para o surgimento de doen as como a fotossensibiliza o hepatógena, cuja etiologia tem sido amplamente discutida. Este trabalho teve como objetivos avaliar a quantidade de esporos do fungo Pithomyces chartarum, o teor de saponinas das gramíneas e o desempenho de bovinos alimentados com capim Brachiaria e Andropogon. Para tanto, cinquenta bovinos da ra a Nelore, distribuídos em dois grupos de 25 animais, cada um alimentado com um tipo de capim, foram pesados do desmame ao abate. Os animais alimentados com Andropogon apresentaram melhor desempenho, principalmente no período seco. O rendimento de carca a foi maior (p<0,05) em animais alimentados com Andropogon (54,9%), em compara o com aqueles alimentados com Brachiaria (53,13%). A Brachiaria apresentou, durante todo o período, maiores teores de saponina (0,03% a 1,09%) do que o Andropogon (0,02% a 0,17%). Nos dois capins constataram-se quantidades semelhantes de esporos do fungo, variando de 0 a 50.000 esporos/g de pasto. Concluiu-se que, embora os dois capins estudados tivessem espo
Is It Possible to Predict the Presence of Intestinal Angioectasias?
Tiago Cúrdia Gon?alves,Joana Magalh?es,Pedro Boal Carvalho,Maria Jo?o Moreira,Bruno Rosa,José Cotter
Diagnostic and Therapeutic Endoscopy , 2014, DOI: 10.1155/2014/461602
Abstract: Background and Aim. Angioectasias are the most common vascular anomalies found in the gastrointestinal tract. In small bowel (SB), they can cause obscure gastrointestinal bleeding (OGIB) and in this setting, small bowel capsule endoscopy (SBCE) is an important diagnostic tool. This study aimed to identify predictive factors for the presence of SB angioectasias, detected by SBCE. Methods. We retrospectively analyzed the results of 284 consecutive SBCE procedures between April 2006 and December 2012, whose indication was OGIB, of which 47 cases with SB angioectasias and 53 controls without vascular lesions were selected to enter the study. Demographic and clinical data were collected. Results. The mean age of subjects with angioectasias was significantly higher than in controls ; . The presence of SB angioectasias was significantly higher when the indication for the exam was overt OGIB versus occult OGIB (13/19 versus 34/81, . Hypertension and hypercholesterolemia were significantly associated with the presence of SB angioectasias (38/62 versus 9/38, and 28/47 versus 19/53, , resp.). Other studied factors were not associated with small bowel angioectasias. Conclusions. In patients with OGIB, overt bleeding, older age, hypercholesterolemia, and hypertension are predictive of the presence of SB angioectasias detected by SBCE, which may be used to increase the diagnostic yield of the SBCE procedure and to reduce the proportion of nondiagnostic examinations. 1. Introduction Obscure gastrointestinal bleeding (OGIB) remains one of the most challenging issues for gastroenterologists. It is defined as bleeding from gastrointestinal (GI) tract that persists or recurs without obvious etiology after esophagogastroduodenoscopy (EGD), colonoscopy, and radiologic evaluation of the small bowel (SB). OGIB accounts for about 5% of the cases of gastrointestinal bleeding [1]. The source of bleeding is located in the SB in about 75% of cases, where lesions can be scarcely accessed by standard endoscopy [1, 2]. These patients frequently require several blood transfusions and repeated hospital admissions, being at risk for complications not only related to anemia, but also caused by numerous exploratory procedures [3]. As a consequence, OGIB negatively affects patients’ quality of life and represents a significant burden of healthcare resources [3]. Small bowel capsule endoscopy (SBCE) has become a particularly useful tool in the management of OGIB, which remains the most common indication for the procedure [4]. Several studies have confirmed the higher diagnostic yield of
Aplica??o do teste de raios x no estudo da morfologia interna e da qualidade fisiológica de aquênios de arnica (Lychnophora pinaster Mart.)
Melo, Paulo Régis Bandeira de;Oliveira, Jo?o Almir;Carvalho, Maria Laene Moreira de;Guimar?es, Renato Mendes;Carvalho, Bruno de Oliveira;
Revista Brasileira de Sementes , 2009, DOI: 10.1590/S0101-31222009000200017
Abstract: the x-ray test is used in seed quality programs to assist morphological and physiological evaluations. arnica (lychnophora pinaster mart.) is considered a medicinal species that has a remarkable number of badly formed seeds at the time of fruit dispersion. thus, the objective of this study was to verify the influence of the maturation stages on the physiological quality of arnica seeds by the x-ray test. the seeds used were collected in december 2003 from a natural population in the district of itumirim, state of minas gerais, brazil. at seed collection the following were considered: the capitulum in which the seeds showed jointed internal papus, less mature stage, without internal papus and seeds that were dispersing. after collection the seeds were dried, cleaning and separated with a vertical blower. the seeds were placed in acrylic transparent plates, radiographed and separated into three categories, full, badly formed and empty seeds according to the internal morphology observed on the radiographs. the time and intensity used during the x-ray test were previously tested. four replications of 50 seeds for each treatment were used. the seeds were placed in a gerbox on paper towel and kept for 90 days in an incubator (bod) adjusted at alternating temperature (20-30oc) and 12-hour photoperiod. the parameters evaluated were speed of germination and final germination percentage. the remaining seeds were subjected to the tetrazolium test to verify seed viability. the x-ray test was shown to be effective for separating the seeds into categories based on their internal morphology. the radiation of 30kv for 45 seconds allowed visualization of the internal structures of the seeds. the capitulum maturation stage with seeds without internal papus at the time of dispersion was the best for seed collection.
Qualidade de sementes de arroz irrigado produzidas com diferentes doses de silício
Vieira, Ant?nio Rodrigues;Oliveira, Jo?o Almir;Guimar?es, Renato Mendes;Carvalho, Maria Laene Moreira de;Pereira, Elise de Matos;Carvalho, Bruno Oliveira;
Revista Brasileira de Sementes , 2011, DOI: 10.1590/S0101-31222011000300012
Abstract: rice production is very important in world agriculture due to the area planted and production levels. it is produced and consumed in every continent and is considered the most important economic cereal in many developing countries. its increasing consumption and status has lead to a growing interest by research institutions for new technologies to increase high quality seed production at lower costs. the objective of this research was to analyze the effect of different silicon dosages (0, 800, 1600 and 3200 kg ha-1) on the physiological quality of rice seeds after 0, 3 and 6 months of storage. seeds of the jequitibá cultivar, produced in a flooded irrigation system in the municipalities of lambari and leopoldina, minas gerais state, were used. the moisture content, germination, vigor by accelerated aging test, emergence, rate of seed emergence (ive) and the isoenzymatic activity were evaluated. the 11.5% mean moisture content of seed before storage remained unaltered during the entire storage period. in lambari, where soils have low si, although the results are inconsistent, we observed a small positive effect of the calcium silicate applied on seed quality. however, in leopoldina, where local soils had medium contents of si, the application of calcium silicate was detrimental to seed quality.
Integrated Tools for American Cutaneous Leishmaniasis Surveillance and Control: Intervention in an Endemic Area in Rio de Janeiro, RJ, Brazil
Cheryl Gouveia,Rosely Magalh?es de Oliveira,Adriana Zwetsch,Daniel Motta-Silva,Bruno Moreira Carvalho,Ant?nio Ferreira de Santana,Elizabeth Ferreira Rangel
Interdisciplinary Perspectives on Infectious Diseases , 2012, DOI: 10.1155/2012/568312
Abstract: American cutaneous leishmaniasis (ACL) is a focal disease whose surveillance and control require complex actions. The present study aimed to apply integrated tools related to entomological surveillance, environmental management, and health education practices in an ACL-endemic area in Rio de Janeiro city, RJ, Brazil. The distribution of the disease, the particular characteristics of the localities, and entomological data were used as additional information about ACL determinants. Environmental management actions were evaluated after health education practices. The frequency of ACL vectors Lutzomyia (N.) intermedia and L. migonei inside and outside houses varied according to environment characteristics, probably influenced by the way of life of the popular groups. In this kind of situation environmental management and community mobilization become essential, as they help both specialists and residents create strategies that can interfere in the dynamics of vector’s population and the contact between man and vectors. 1. Introduction American cutaneous leishmaniasis (ACL) is among the six most important infectious diseases and the 15 most neglected diseases of the world [1]. It presents a diversity of transmission cycles that involve different species of parasites, vectors, and hosts in restricted ecological niches [2]. Thus, the indication of control measures must consider the entomological and epidemiological characteristics of each locality. According to Sabroza et al. [3], for each disease and particular situation there are environmental and behavioral factors related to the production of endemic or epidemic processes. To explain these factors, Sabroza et al. [3, page 216] used the concept of conditions receptivity, defined as the “set of environmental, social and behavioral characteristics that allow the reproduction of the parasites and its maintenance in the communities.” The city of Rio de Janeiro presents many areas where these conditions are met, mainly because of human occupation of hillsides, which modifies the landscape and favors the installation of ACL transmission cycles. The number of cases in the city has been increasing since the 1980s, with the west zone presenting the highest indices, more specifically the region of Jacarepaguá [4]. Most of the cases in the study area (Campus FIOCRUZ da Mata Atlantica - CFMA, Rio de Janeiro) are related to the occupation of hillsides in Maci?o da Pedra Branca, an Atlantic Forest area. The present study aimed to discuss an experience on ACL surveillance based on integrated tools related to entomological
Eros Moreira Carvalho
Philósophos : Revista de Filosofia , 2009, DOI: 10.5216/phi.v13i1.5773
Abstract: The foundationalist need to deal with two fundamental problems: (i) explain how a justificator grants justification without itself need justification and (ii) to determine the justificator’s epistemic status. Burdzinski (Burdzinski 2007), in the same line of Sellars and Bonjour, argues that the perceptive experience could not be a response to the first problem, because if its content was not propositional it would not grant justification and if its content was propositional it would grant justification and would require justification. My proposal is that perceptual experience justify in virtue of its representational nature. The act of taking the content of a perception by his face value is justified until there is a reason to the contrary, ie, this act is prima facie justified. This forces us to answer the second problem by saying that the basic justificator is not infallible. This falibilist response dislike the skeptic, but it is the best foundationalist answer to epistemic regress. O fundacionista precisa lidar com dois problemas fundamentais: (i) explicar como um item justificador provê justifica o sem ele mesmo precisar de justifica o e (ii) determinar o estatuto epistêmico do item justificador básico. Burdzinksi (Burdzinski 2007), na mesa linha de Sellars e Bonjour, argumenta que a experiência perceptiva n o tem como ser uma resposta ao primeiro problema, pois, se o seu conteúdo n o for proposicional, ela n o provê justifica o, e se for, ela tanto provê quanto carece de justifica o. Minha proposta é que a experiência perceptiva justifica em virtude da sua natureza representacional. O ato de tomar o conteúdo de uma percep o pelo seu valor de face está justificado até que haja uma raz o em contrário, ou seja, este ato está justificado prima facie. Isto nos for a a responder o segundo problema afirmando que o justificador básico n o é infalível. Esta resposta falibilista desagrada ao cético, mas é a melhor resposta fundacionista ao regresso epistêmico.
Cren as justificadas n o-inferencialmente e o mito do dado
Eros Moreira de Carvalho
Princípios : Revista de Filosofia , 2009,
Abstract: The aim of this paper is to present an explanation of how the perceptual experience fulfills its role of justification. The idea is that the perceptual experience justifies non-inferentially empirical beliefs in an internalist sense of justification. Against Sellars, I want to say that S relied on his experience to believe that the world is so and so. To discuss this question, I choose the arguments of Brewer and McDowell. Both argue that the experience can justify beliefs, provided it has a conceptual content. But I will defend that there is no such need. The content can be non-conceptual and even then the experience can justify beliefs non-inferentially. I will try to explain how this is possible and at the end I will assess my approach in the face of Sellars' claim that empiricism assumes a triad of inconsistents thesis. I will recast these thesis in accordance with the approach defended and I will conclude that this present version of empiricism is free from Sellars's criticism.
Sharkovskii order for non-wandering points
M. Carvalho,F. Moreira
Mathematics , 2011,
Abstract: For a map $f:I \rightarrow I$, a point $x \in I$ is periodic with period $p \in \mathbb{N}$ if $f^p(x)=x$ and $f^j(x)\not=x$ for all $0
An ergodic theorem for non-invariant measures
Maria Carvalho,Fernando Moreira
Mathematics , 2012,
Abstract: Given a space $X$, a $\sigma$-algebra $\mathfrak{B}$ on $X$ and a measurable map $T:X \to X$, we say that a measure $\mu$ is half-invariant if, for any $B \in \mathfrak{B}$, we have $\mu(T^{-1}(B)\leq \mu (B)$. In this note we present a generalization of Birkhoff's Ergodic theorem to $\sigma$-finite half-invariant measures.
As condi??es sociais da a??o instrumental: problemas na concep??o sociológica da teoria da escolha racional
Carvalho, Bruno Sciberras de;
Dados , 2007, DOI: 10.1590/S0011-52582007000400007
Abstract: this article critically analyzes new sociological approaches to the rational choice theory which - beyond examining political or economic practices - link the notion of instrumental rationality to social issues and themes. the article begins by highlighting the issue of trust, indicating the functionality of certain social arrangements in collective problem-solving. the paper goes on to demonstrate that problems emerge with the theory when it attempts to explain the feasibility of social norms in impersonal, comprehensive contexts. thus, the fundamental point that appears to be missing from rational choice theory is the perception that individual decisions and instrumental conduct itself incorporate dispositions that in a sense are beyond the actors' control.
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