The autonomic control and functional significance of the changes in heart rate associated with air breathing in the jeju, Hoplerythrinus unitaeniatus

The jeju is a teleost fish with bimodal respiration that utilizes a modified swim bladder as an air-breathing organ (ABO). Like all air-breathing fish studied to date, jeju exhibit pronounced changes in heart rate (f(H)) during air-breathing events, and it is believed that these may facilitate oxygen uptake (M-O2) from the ABO. The current study employed power spectral analysis (PSA) of f(H) patterns, coupled with instantaneous respirometry, to investigate the autonomic control of these phenomena and their functional significance for the efficacy of air breathing. The jeju obtained less than 5% of total M-O2 (M-tO2) from air breathing in normoxia at 26 degrees C, and PSA of beat-to-beat variability in fH revealed a pattern similar to that of unimodal water-breathing fish. In deep aquatic hypoxia (water P-O2=1 kPa) the jeju increased the frequency of air breathing (f(AB)) tenfold and maintained M-tO2 unchanged from normoxia. This was associated with a significant increase in heart rate variability (HRV), each air breath (AB) being preceded by a brief bradycardia and then followed by a brief tachycardia. These f(H) changes are qualitatively similar to those associated with breathing in unimodal air-breathing vertebrates. Within 20 heartbeats after the AB, however, a beat-to-beat variability in f(H) typical of water-breathing fish was re-established. Pharmacological blockade revealed that both adrenergic and cholinergic tone increased simultaneously prior to each AB, and then decreased after it. However, modulation of inhibitory cholinergic tone was responsible for the major proportion of HRV, including the precise beat-to-beat modulation of f(H) around each AB. Pharmacological blockade of all variations in f(H) associated with air breathing in deep hypoxia did not, however, have a significant effect upon f(AB) or the regulation of M-tO2. Thus, the functional significance of the profound HRV during air breathing remains a mystery.

Responda, cadáver: o discurso da crise na poesia moderna

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Mitochondrial genome sequence of the Brazilian luminescent click beetle Pyrophorus divergens (Coleoptera: Elateridae): Mitochondrial genes utility to investigate the evolutionary history of Coleoptera and its bioluminescence

The Coleoptera order is the richest group among Metazoa, but its phylogenetics remains incompletely understood. Among Coleoptera, bioluminescence is found within the Elateroidea, but the evolution of this character remains a mystery. Mitochondrial DNA has been used extensively to reconstruct phylogenetic relationships, however, the evolution of a single gene does not always correspond to the species evolutionary history and the molecular marker choice is a key step in this type of analysis. To create a solid basis to better understand the evolutionary history of Coleoptera and its bioluminescence, we sequenced and comparatively analyzed the mitochondrial genome of the Brazilian luminescent click beetle Pyrophorus divergens (Coleoptera: Elateridae). © 2007 Elsevier B.V. All rights reserved.

A metáfora do Bogatyr: o corpo acrobata e a cena russa no início do século XX

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relato de um certo Oriente de Milton Hatoum: a construção inovadora de um romance brasileiro contemporâneo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Can entanglement explain black hole entropy?

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Divinas comédias contemporâneas: duas releituras brasileiras do clássico Dantesco

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Vitrina, design e emoção: uma investigação sobre a percepção visual feminina

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Cheira bem pode fazer mal: a configuração de O perfume como romance policial

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ossos e espelhos mortos: uma leitura de Reflexos do baile e Esqueleto na lagoa verde, de Antonio Callado

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O mito de Ulisses em Se questo è un uomo

Este trabalho parte do mito de Ulisses retomado por Dante e se concentra na leitura feita por Levi do canto dantesco , bem como da (re) elaboração da última aventura do herói grego no contexto da história pessoal do escritor. Trata-se de um moderno Ulisses apresentando uma visão moderna do Inferno. Em Dante, Ulisses está entre as almas condenadas a pagar eternamente seus pecados e, ao mesmo tempo, testemunhas e narradores, capazes de contar o processo da própria morte. Neste sentido, o viajante grego tornou-se , a partir da publicação da obra de memória do Holocausto escrita por Primo Levi, o símbolo do testemunho dos campos de concentração. O exemplo clássico da presença de Dante na narrativa de Levi é o capítulo XI do livro Se questo è un uomo , intitulado “Il canto di Ulisse”, onde prosa e poesia se encontram. O mito de Ulisses, que representa a exaltação do homem inteligente, ávido de conhecimento, que chega às portas do grande mistério da existência humana torna-se, em Levi, um instrumento didático. Recitar uma poesia assume, no universo do campo de concentração, o valor de um ato político e humano, uma afirmação coletiva dos valores que aquele sistema pretendia destruir.

As memórias de crónica de una muerte anunciada

Pós-graduação em Estudos Literários - FCLAR

Identificação de alunos com altas habilidades ou superdotação a partir de uma avaliação multimodal

Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

L'Inspiration romantique de Gaspard de la Nuit

In this work, we intend to show that Aloysius Bertrand in “Gaspard de la Nuit” drew the inspiration to his poems in prose from its nearest context: that one of French Revolution and the revolt of the spirit against everything which would impose an exaggerated materialism. Thus, in the middle of Enlightenment, there were those who went in search of “mysterious realities” and a “sense of mystery” that the pre-romantic literature in Britain and in Germany would express in its poetry. It is also in the 18th century that some works about the “Commedia dell‟arte” and caricature concede to the grotesque a significant part in the formation of art, extending it to the supernatural and the absurd.

O emprego da literatura na educação infantil: a investigação e intervenção com professores de pré-escola

INTRODUCTION: The children's schools are expanded spaces of education and care for infants. The educator's role as mediator in learning is crucial to child development, and the use of children's books can act as an important methodological and pedagogical resource in this process. METHODS: This paper describes a psychoeducational intervention performed with the educators of a public pre-school with the following objectives: (a) register the collection of children's books of the school, (b) investigate the acquisition and use of children's books by the teachers and (c) offer an intervention to teachers regarding the educational use of children's books. The participants were seven educators who worked with children from 2 to 6 years old. RESULTS: The results indicate that among the 315 books in the school, the majority was about animal stories (75 books), fantasy and mystery (38), fairy tales and fables (34), formal learning (33), learning rules (33) and about nature and environment (22). The educators reported that the choice of books was made mainly considering the age group to which the books were directed, and also from the themes found in texts and/ or illustrations. Although the teachers believe that the books can encourage reading among children, they don't describe their use in planned activities and they report lack of knowledge about their use. CONCLUSION: The proposed intervention to the teachers allowed them to rethink the use of books in pre-school, instructing them to the utilization of the books aiming to stimulate the imagination and creativity, improving the critical and reflexive capability of the children.