Imagem do rádio: a infinita sensibilidade do ouvir

Pesquisa publicada no livro “Imagem do Rádio”. Aborda a audição radiofônica como um campo privilegiado, que ao saturar apenas um órgão do sentido (o ouvir) potencializa o homem em sua amplitude simbólica. A necessidade do ouvir aproximou a audiência brasileira ao mundo à custa da “radiodifusão internacional” via Ondas Curtas. Estava no ar a Guerra Fria transmitindo no rádio, em português, as questões políticas, ideológicas e culturais polarizadas nos esforços do conflito. Este objeto de análise inicia com o fluxo das emissões políticas, décadas de 70 e 80. À frente o universo se amplia com o sinal de outras rádios internacionais que não atuaram do discurso de combate, permitindo o contraponto das informações. No Brasil há uma audiência segmentada nesse tipo de escuta por questões culturais e afetivas. Ao delimitar esse conjunto de ouvintes o livro pontua o sentido da audiência e faz uma análise iconográfica dos cartões QSLs recebidos. As imagens permitem identificar as emissoras sintonizadas, a sua radiografia, suas pautas, formas de propagandas e construções simbólicas entre emissor/receptor. Esse quadro radiofônico apresenta percepções das formas culturais elementares ao homo symbolicus

Editorial

Periódico digital aberto, para divulgação científica, vinculado ao Departamento de Educação DEDCXII da UNEB, cujo objetivo é socializar o conhecimento produzido em diversas áreas

Editorial

Periódico digital aberto, para divulgação científica, vinculado ao Departamento de Educação DEDCXII da UNEB, cujo objetivo é socializar o conhecimento produzido em diversas áreas

Editorial

A Revista ComCiência é um periódico científico idealizado pelo Departamento de Educação da Universidade do Estado da Bahia (Campus XII), da cidade de Guanambi, a qual encontra-se situada na microrregião do Alto Sertão da Bahia, uma área angulada pelo rio São Francisco e seu afluente Verde Grande, constituindo partes das regiões econômicas da Serra Geral, da Chapada Diamantina e do Médio São Francisco

Editorial

Periódico digital aberto, para divulgação científica, vinculado ao Departamento de Educação DEDCXII da UNEB, cujo objetivo é socializar o conhecimento produzido em diversas áreas

Editorial

Periódico digital aberto, para divulgação científica, vinculado ao Departamento de Educação DEDCXII da UNEB, cujo objetivo é socializar o conhecimento produzido em diversas áreas

Museums and cradles of diversity are geographically coincident for narrowly distributed Neotropical snakes

Factors driving the spatial configuration of centres of endemism have long been a topic of broad interest and debate. Due to different eco-evolutionary processes, these highly biodiverse areas may harbour different amounts of ancient and recently diverged organisms (paleo- and neo-endemism, respectively). Patterns of endemism still need to be measured at distinct phylogenetic levels for most clades and, consequently, little is known about the distribution, the age and the causes of such patterns. Here we tested for the presence of centres with high phylogenetic endemism (PE) in the highly diverse Neotropical snakes, testing the age of these patterns (paleo- or neo-endemism), and the presence of PE centres with distinct phylogenetic composition. We then tested whether PE is predicted by topography, by climate (seasonality, stability, buffering and relictualness), or biome size. We found that most areas of high PE for Neotropical snakes present a combination of both ancient and recently diverged diversity, which is distributed mostly in the Caribbean region, Central America, the Andes, the Atlantic Forest and on scattered highlands in central Brazil. Turnover of lineages is higher across Central America, resulting in more phylogenetically distinct PE centres compared to South America, which presents a more phylogenetically uniform snake fauna. Finally, we found that elevational range (topographic roughness) is the main predictor of PE, especially for paleo-endemism, whereas low paleo-endemism levels coincide with areas of high climatic seasonality. Our study highlights the importance of mountain systems to both ancient and recent narrowly distributed diversity. Mountains are both museums and cradles of snake diversity in the Neotropics, which has important implications for conservation in this region.Fil: Azevedo, Josué Anderson Rêgo. University Goteborg; Suecia. Gothenburg Global Biodiversity Centre; SueciaFil: Guedes, Thaís B.. University Goteborg; Suecia. Gothenburg Global Biodiversity Centre; Suecia. Universidade Estadual do Maranhão. Centro de Estudos Superiores de Caxias. Programa de Pós-graduação em Biodiversidade, Ambiente e Saúde; PortugalFil: Nogueira, Cristiano de Campos. Universidade de Sao Paulo; BrasilFil: Passos, Paulo. Universidade Federal do Rio de Janeiro; BrasilFil: Sawaya, Ricardo. Universidad Federal do Abc; BrasilFil: Prudente, Ana. Museu Paraense Emílio Goeldi; BrasilFil: Barbo, Fausto Erritto. Governo do Estado de Sao Paulo. Secretaria da Saude. Instituto Butantan; BrasilFil: Strüssmann, Christine. Universidade Federal do Mato Grosso do Sul; BrasilFil: Franco, Francisco L.. Governo do Estado de Sao Paulo. Secretaria da Saude. Instituto Butantan; BrasilFil: Arzamendia, Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Giraudo, Alejandro Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Argolo, Antonio. Universidade Estadual de Santa Cruz; BrasilFil: Jansen, Martin. Senckenberg Research Institute and Nature Museum; AlemaniaFil: Zaher, Hussam. Universidade de Sao Paulo; BrasilFil: Tonini, Joao Filipe Riva. Centre National de la Recherche Scientifique; Francia. Muséum National d'Histoire Naturelle; Francia. Sorbonne University; Francia. Harvard University; Estados UnidosFil: Faurby, Søren. University Goteborg; SueciaFil: Antonelli, Alexandre. University Goteborg; Sueci

Editorial

Com satisfação publicamos o oitavo número da Revista ComCiência, no qual o(a) leitor(a) poderá acessar artigos originais nas áreas de humanas e biológicas, bem como terá acesso ao conjunto de artigos e resumos expandidos apresentados na VIII Semana de Educação Física do Departamento de Educação/Campus XII da Universidade do Estado da Bahia (UNEB)

Clinical responses to acute blood loss in goats

The response to blood loss is directly related to the degree of hemorrhage, but for the caprine species some aspects still need to be investigated. Therefore, the present study aimed to assess the clinical and hemodynamic effects of acute blood loss in goats. Eight healthy, adult male crossbred goats were subjected to external jugular puncture to remove 30% of the total blood volume. A physical examination and blood gas, biochemical, and hematologic analyses were performed at baseline, before blood loss (T0), and after one (T1h), six (T6h), 12 (T12h), 24 (T24h) and 72 (T72h) hours, and eight (T8d), 16 (T16d), 24 (T24d) and 32 (T32d) days after the acute blood loss event. The goats presented with tachycardia, tachypnea, and hyperthermia one hour after blood loss with a return to normal physiological values at T6h. Packed cell volume was decreased at T1h and red cell counts at T12h, both returning to baseline at T24d. There was a reduction in total protein and albumin levels at T1h, both remained below baseline levels until T16d and T8d, respectively. The serum calcium concentration decreased over the period T1h to T24h and glucose increased over the period T1h to T6h. The values of pH, TCO2, bicarbonate, and base excess were lower at T1h, while lactate increased markedly at this time. The pCO2 value only was reduced at T24h. Systolic (PS), diastolic (PD), and mean (PM) pressures were decreased at T1h. Acute loss of 30% of blood volume in goats caused changes in clinical, blood gas, and biochemical parameters, which were restored over a six-hour period, while hematologic changes were more persistent, with baseline values restored only after 24 days

Biogeographic regionalization of snakes in the Atlantic Forest hotspot: interpolating the faunal dissimilarity

Aim: Snake faunal dissimilarity within tropical forests is not well characterized, nor are the factors underlying these patterns. Our aim was to disentangle the ecological and historical factors driving biogeographical subregions (BSR) for snakes. Location Brazilian Atlantic Forest (BAF). Methods: We compiled 274 snake inventories to build a species-by-site matrix and used unconstrained ordination and clustering techniques to identify the number of snake BSR. We applied an interpolation method to map axes of compositional variation over the whole extent of the BAF, and then classified the compositional dissimilarity according to the number of snake BSR identified a priori. We used multinomial logistic regression models and deviance partitioning techniques to investigate the influence of contemporary climatic stability, productivity, topographic complexity, and historical climate shifts in explaining the BSR. Results: We identified 198 snake species organized into six BSR, three of them located along the BAF coast and the other three predominantly inland BSR. Climatic stability made the largest contribution to explaining the variability in snake BSR, followed by productivity and historical variation in climate. Topography was important only if historical variation in climate was excluded from the analysis. Main conclusions: The highest rates of snake endemism within BAF were in the coastal BSR, as compared to the inland BSR that are mostly composed of open habitat specialists. Our findings suggest that the topographic complexity of the BAF acts on snake distributions not as a physical barrier, but rather as a climatic barrier, providing historical climate refuges for species living along altitudinal gradients. Overall, the predominance of climatic stability and historic variation in climate in explaining snake BSR reinforces the importance of thermoregulatory constraints in shaping the distribution of tropical ectotherm species