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Search Results: 1 - 10 of 182798 matches for " Caio Maximino de Oliveira "
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Pluralidade racial: um novo desafio para a psicologia
Caio Maximino de Oliveira
Psicologia: Ciência e Profiss?o , 2002, DOI: 10.1590/s1414-98932002000400005
Abstract: Esse artigo tem por objetivo analisar os elementos que constituem o racismo e a discrimina o por meio de uma perspectiva psicossocial, demonstrando as raízes culturais das manifesta es de preconceito e sua origem no mito do bode expiatório. Visa mostrar a nossa imers o quase completa na ideologia dominante, jogando principalmente com os conceitos de imaginário social, ideologia, hegemonia e autoridade e sua constru o social. Apresenta um ponto de vista anti-autoritário e por meio deles, demonstra o desafio da Psicologia em se livrar dos grilh es impostos pela ideologia dominante que a impedem de ser ciência n o comprometida com as classes dominantes. This paper aims to determine the causes of racism and discrimination through a psychosocial perspective, demonstrating the cultural roots of prejudiced manifestations and its origins in the myth of the scapegoat. The objective is, thus, to show our almost complete immersion in the dominant ideology, dealing mainly with the concepts of social imaginary, ideology, hegemony and authority and its historical construction. An anti-authoritarian point of view is placed. Through it, Psychology's challenge in getting rid of its manacles, imposed by the dominant ideology, that hinders it from being a science not involved with the dominant classes.
Construct validity of behavioral models of anxiety: where experimental psychopathology meets ecology and evolution
Maximino, Caio;Brito, Thiago Marques de;Gouveia Jr, Amauri;
Psychology & Neuroscience , 2010, DOI: 10.3922/j.psns.2010.1.015
Abstract: in experimental psychopathology, construct validity is usually enhanced by addressing theories from other fields in its nomological network. in the field of anxiety research, this construct is related to antipredator behavior, conserved across phylogeny in its functions and neural basis, but not necessarily on its topography. even though the relations between behavioral models of anxiety and statements from behavioral ecology and evolutionary biology are commonly made in anxiety research, these are rarely tested, at least explicitly. however, in order to increase construct validity in experimental anxiety, testing predictions from those theories is highly desirable. this article discusses these questions, suggesting a few ways in which behavioral ecological and evolutionary hypotheses of anxiety-like behavior may be tested.
Construct validity of behavioral models of anxiety: where experimental psychopathology meets ecology and evolution.
Caio Maximino,Thiago Marques de Brito,Amauri Gouveia Jr
Psychology & Neuroscience , 2010,
Abstract: In experimental psychopathology, construct validity is usually enhanced by addressing theories from other fields in its nomological network. In the field of anxiety research, this construct is related to antipredator behavior, conserved across phylogeny in its functions and neural basis, but not necessarily on its topography. Even though the relations between behavioral models of anxiety and statements from behavioral ecology and evolutionary biology are commonly made in anxiety research, these are rarely tested, at least explicitly. However, in order to increase construct validity in experimental anxiety, testing predictions from those theories is highly desirable. This article discusses these questions, suggesting a few ways in which behavioral ecological and evolutionary hypotheses of anxiety-like behavior may be tested.
Evolutionary Changes in the Complexity of the Tectum of Nontetrapods: A Cladistic Approach
Caio Maximino
PLOS ONE , 2008, DOI: 10.1371/journal.pone.0003582
Abstract: Background The tectum is a structure localized in the roof of the midbrain in vertebrates, and is taken to be highly conserved in evolution. The present article assessed three hypotheses concerning the evolution of lamination and citoarchitecture of the tectum of nontetrapod animals: 1) There is a significant degree of phylogenetic inertia in both traits studied (number of cellular layers and number of cell classes in tectum); 2) Both traits are positively correlated accross evolution after correction for phylogeny; and 3) Different developmental pathways should generate different patterns of lamination and cytoarchitecture. Methodology/Principal Findings The hypotheses were tested using analytical-computational tools for phylogenetic hypothesis testing. Both traits presented a considerably large phylogenetic signal and were positively associated. However, no difference was found between two clades classified as per the general developmental pathways of their brains. Conclusions/Significance The evidence amassed points to more variation in the tectum than would be expected by phylogeny in three species from the taxa analysed; this variation is not better explained by differences in the main course of development, as would be predicted by the developmental clade hypothesis. Those findings shed new light on the evolution of an functionally important structure in nontetrapods, the most basal radiations of vertebrates.
Modulation of nociceptive-like behavior in zebrafish (Danio rerio) by environmental stressors
Maximino, Caio;
Psychology & Neuroscience , 2011, DOI: 10.3922/j.psns.2011.1.017
Abstract: zebrafish have been demonstrated to react consistently to noxious chemical stimuli and present reliable phenotypes of stress, fear, and anxiety. in this article, we describe the modulation of nociceptive-like responses of zebrafish to fear-, stress-, and anxiety-eliciting situations. animals were exposed to an alarm substance, confinement stress, or a novel environment before being injected with 1% acetic acid in the tail. the alarm substance and confinement stress reduced the display of erratic movements and tail-beating behavior elicited by acetic acid. the novelty of the environment, in contrast, increased the frequency of tail-beating behavior. the results suggest that descending modulatory control of nociception exists in zebrafish, with apparent fear- and stress-induced analgesia and anxiety-induced hyperalgesia.
Modulation of nociceptive-like behavior in zebrafsh (Danio rerio) by environmental stressors
Caio Maximino
Psychology & Neuroscience , 2011,
Abstract: Zebrafsh have been demonstrated to react consistently to noxious chemical stimuli and present reliable phenotypes of stress, fear, and anxiety. In this article, we describe the modulation of nociceptive-like responses of zebrafsh to fear-, stress-, and anxiety-eliciting situations. Animals were exposed to an alarm substance, confnement stress, or a novel environment before being injected with 1% acetic acid in the tail. The alarm substance and confnement stress reduced the display of erratic movements and tail-beating behavior elicited by acetic acid. The novelty of the environment, in contrast, increased the frequency of tail-beating behavior. The results suggest that descending modulatory control of nociception exists in zebrafsh, with apparent fear- and stress-induced analgesia and anxiety-induced hyperalgesia.
Portfolio Allocation Subject to Credit Risk
Rogerio de Deus Oliveira,Caio Ibsen Rodrgues de Almeida
Revista Brasileira de Finan?as , 2003,
Abstract: Credit Risk is an important dimension to be considered in the risk management procedures of financial institutions. Is a particularly useful in emerging markets where default rates on bank loan products are usually high. It is usually calculated through highly costly Monte Carlo simulations which consider different stochastic factors driving the uncertainly associated to the borrowers liabilities. In this paper, under some restrictions, we drive closed form formulas for the probability distributions of default rates of bank loans products involving a big number of clients. This allows us to quickly obtain the credit risk of such products. Moreover, using these probability distributions, we solve the problem of optimal portfolio allocation under default risk.
INTERACCIONES DISCURSIVAS E INDISCIPLINA EN CLASES DE CIENCIAS DE SEXTO GRADO, ESTUDIO DE CASO
CAIO SAMUEL FRANCISCATI DA SILVA,ROSEMARY RODRIGUES DE OLIVEIRA
Gondola : Ense?anza y Aprendizaje de las Ciencias , 2012,
Abstract: In the research, we analyze how the discursive interactions occur and their quality. It was considered both interactions: the teacher-student type as well as student-student one during the teaching-learning processes that took place in science classes. We made observations of eleven science lessons in a fifth grade (sixth year)of the elementary school in a public school Jaboticabal (S o Paulo, Brazil). The results, which were analyzed based on the vygotskian referential, indicate that the interactive processes are fraught with cases of indiscipline in which the teacher lost control of the situation due to the excessive talking and movement ofthe students. In this context, we find a polarity in the interactive relations in the studied case: first, the teacher-student interaction is intended to control the behavior of the students and to impose the teacher’s authority; on the other hand, the student-student interactions function as a way to display resistance to thepresence of the teacher. Therefore, the student-student interactions are interpreted by the teacher as disruptive behaviors that need to be controlled and/or extinguished.
EMPREGO DE INIBIDORES DE PROTEASE VEGETAIS COMO FERRAMENTA BIOTECNOLóGICA ALTERNATIVA NO CONTROLE DE PRAGAS
Caio Fernando Ramalho de Oliveira,Maria Lígia Rodrigues Macedo
Perspectivas Online : Biológicas e Saúde , 2011,
Abstract: Estatísticas d o-nos conta que em 2050 a popula o humana será de 9,1 bilh es de habitantes. Nestascircunstancias, recursos básicos como água e alimentos tornar-se- o escassos. Em especial, o fornecimentode alimento para a popula o em rápida expans o será um desafio para a humanidade. Há muito tempo ohomem busca maneiras de combater as perdas agrícolas. A introdu o dos inseticidas químicos nas lavourasfoi muito importante, no entanto, seus efeitos tóxicos s o indesejados. Por isso, a busca por agentesinseticidas que n o apresentem efeitos indesejáveis sobre a saúde e ao meio ambiente tornou-se necessária.Dentre as possibilidades existentes, a biotecnologia de plantas aparece como uma importante ferramenta parao controle de pragas, auxiliando no oferecimento de alimento com uma menor carga de produtos tóxicos. Osinibidores de proteases constituem uma interessante classe de proteínas vegetais bioinseticidas com potencialbiotecnológico. Durante décadas seu uso no combate a pragas agrícolas vem sendo estudado e plantastransformadas expressando diferentes inibidores apresentaram resultados satisfatórios, mostrandoperspectivas animadoras de sua aplica o como ferramenta biotecnológica para a prote o dos cultivares.Nesta revis o apresentamos algumas informa es sobre a biologia destas moléculas vegetais e sua história,relatos de trabalhos onde sua atividade inseticida foi estudada em plantas modificadas geneticamente e aindao futuro desta tecnologia, que poderá envolver a combina o de diferentes proteínas inseticidas e até mesmoa fus o de proteínas para a obten o de plantas mais eficientes.
The review of the methods to obtain non-neuronal cells to study glial influence on Amyotrophic Lateral Sclerosis pathophysiology at molecular level in vitro
Scorisa, Juliana Milani;Duobles, Tatiana;de Oliveira, Gabriela Pintar;Maximino, Jessica Ruivo;Chadi, Gerson;
Acta Cirurgica Brasileira , 2010, DOI: 10.1590/S0102-86502010000300011
Abstract: purpose: amyotrophic lateral sclerosis (als) is a fatal neurodegenerative disease that displays a rapid evolution. current treatments have failed to revert clinical symptoms because the mechanisms involved in the death of motoneuron are still unknown. recent publications have put non-neuronal cells, particularly, astrocyte and microglia, in the scenario of pathophisiology of the disease. animal models for als, particularly transgenic mice expressing the human sod1 gene with a g93a mutation (hsod1), are available and display the phenotype of the disease at cellular and clinical levels. however, it is a lack of detailed information regarding the methods to study the disease in vitro to better understand the contribution of non-neuronal cells in the onset and progression of the pathology. methods: colonies of swiss mice and transgenic mice expressing hsod1 mutation as well as non-transgenic controls (wild-type) were amplified after a genotyping evaluation. disease progression was followed behaviorally and mortality was registered. highly purified primary cultures of astrocytes and microglia from mouse spinal cord were obtained. cells were identified by means of gfap and cd11b immunocytochemistry. the purity of astroglial and microglial cell cultures was also accompanied by means of western blot and rt-pcr analyses employing a number of markers. results: the disease onset was about 105 days and the majority of transgenic mice displayed the disease symptoms by 125 days of age and reached the endpoint 20 days later. a substantial motor weakens was registered in the transgenic mice compared to wild-type at the end point. immunocytochemical, biochemical and rt-pcr analyses demonstrated a highly purified primary cultures of spinal cord astrocytes and microglia. conclusion: it is possible to achieve highly purified primary cultures of spinal cord astrocytes and microglia to be employed in cellular and molecular analyses of the influence of such non-neuronal cells in the patho
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