993 research outputs found
Convective–reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O–C shell mergers
No full text© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We address the deficiency of odd-Z elements P, Cl, K and Sc in Galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O and C shells in massive stars. 3D hydrodynamic simulations of O-shell convection with moderate C-ingestion rates show no dramatic deviation from spherical symmetry. We derive a spherically averaged diffusion coefficient for 1D nucleosynthesis simulations, which show that such convective-reactive ingestion events can be a production site for P, Cl, K and Sc. An entrainment rate of 10-3M⊙s-1features overproduction factors OPs≈ 7. Full O-C shell mergers in our 1D stellar evolution massive star models have overproduction factors OPm> 1 dex but for such cases 3D hydrodynamic simulations suggest deviations from spherical symmetry. γ - process species can be produced with overproduction factors of OPm> 1 dex, for example, for130, 132Ba. Using the uncertain prediction of the 15M⊙, Z = 0.02 massive star model (OPm≈ 15) as representative for merger or entrainment convective-reactive events involving O- and C-burning shells, and assume that such events occur in more than 50 per cent of all stars, our chemical evolution models reproduce the observed Galactic trends of the odd-Z elements
Omai, Otaitiano condotto in Inghilterra [picture] /
No full textAfter pl. no. LVII, v.1, of: A voyage towards the South Pole and round the world, by J. Caldwall after William Hodges.; Exhibited:'Cook & Omai: The Cult of the South Seas', NLA 2001; Rex Nan Kivell Collection NK11277.; U3045
Multimedia fiction: theory and practice of Décio Pignatari s literary narrative
No full textA tese tem por temas a teoria e a prática da prosa ficcional em Décio Pignatari.
Décadas de trabalho em diferentes pólos da comunicação publicou ensaios e deu aulas de teoria da informação, atuou como articulista na imprensa, foi o primeiro intelectual a escrever seriamente sobre a TV no Brasil, traduziu Marshall McLuhan, fez publicidade e cinema transformaram Pignatari num criador multimídia. É essa característica que marca sua obra voltada para a ficção.
Pautada pelo uso de múltiplos recursos, verbais e não-verbais, literários e de mídias diversas, as narrativas de Décio Pignatari representam extensões de sua prosética como ele chama o seu pensamento sobre a prosa ficcional e vice-versa
Enquanto a plataforma teórica pignatariana para a ficção estabeleceu-se especialmente por meio de cursos, ensaios e artigos, sua produção em termos de narrativa literária deu origem aos seguintes títulos, que serão aqui analisados: 1)O rosto da memória, contos; 2)Panteros, romance; 3) Cléris und Lotta , que integra a antologia 21 Histórias de amor, mas que já aparecera, sem título, no corpo do prefácio de Cultura pós-nacionalista, coletânea de textos de não-ficção; e 4)Céu de lona, peça teatral.
Para estudar prosa ficcional de Décio Pignatari, a tese vale-se sobretudo da própria prosética que tem por base a semiótica de Charles Sanders Peirce. De acordo com Pignatari, a ficção, notadamente a que surge a partir de Ulisses (1922), de James Joyce, se apóia na secundidade peirceana, que se projeta sobre a terceiridade como um presente suspenso , ponto de encontro dos demais tempos, do máximo de gêneros e de discursos de distintos meios de comunicação.
Esta é a proposta do autor para sua prosa ficcional, espelho da prosética , que dela também se alimenta, conforme pretendemos demonstrar.
Ressalte-se que Décio Pignatari alcança pela primeira vez essa condição acadêmicaThe dissertation subject is the theory and practice of Décio Pignatari s fictional prose.
Decades of work in various fields of communication he has published essays, has taught information theory, has written to the press and was the first intellectual to write in-depth pieces on TV in Brazil, he has translated Marshall McLuhan, has produced advertising pieces, and cinema have made of Pignatari a multimedia creator. This approach also defines his fictional production.
Characterized by the usage of multiple resources, both verbal and non-verbal, literary and of various media, Décio Pignatari s narratives represent extensions of his prosética as he calls his thinking on the fictional prose and vice versa.
While the pignatarian theoretical platform catering his fiction has been established especially through courses, articles, and essays, his narrative literary production has originated the following works: 1) O rosto da memória [The face of memory], stories; 2) Panteros [Pantheros], novel; 3) Cléris und Lotta [Cléris and Lotta], narrative that integrates the anthology 21 Histórias de Amor [21 Love Stories], which had already appeared, untitled, in the foreword to Cultura pós-nacionalista [Post-Nationalist Culture], collected non-fictional texts; and 4) Céu de lona [Tent sky], a play.
To survey Décio Pignatari s fictional prose, the dissertation counts mostly on the very prosética which is based on Charles Sanders Peirce s semiotic. According to Pignatari, fiction, notably the one produced since the release of Ulysses (1922), by James Joyce, is dominated by Peirce s Secondness, which projects itself on Thirdness as a suspended gift, a meeting point of the other tenses, the maximum of genders and of distinct discourses of the media.
This is the author s purpose for his fictional prose, a prosética mirror, that also feeds itself, as we intend to demonstrate.
This is the first "critical study" of Décio Pignatari s fictional prose and his prosétic
Eles não disseram tudo: por um suplemento do suplemento de Ana Cristina Cesar em Carlos Drummond de Andrade
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em LiteraturaA dissertação que aqui se apresenta consta da análise de comentários feitos por Ana Cristina Cesar às bordas de seu exemplar do livro Reunião, de Carlos Drummond de Andrade. A intenção foi trabalhar as marginálias a partir de uma lógica do suplemento derridiano em um esforço de determinação que pretendeu voltar sempre para a poesia, especialmente de Ana C.. O procedimento se justifica como método escolhido para possibilitar uma abertura das escrituras pelo atrito e em direção oposta àquilo que se identificaria como influência do cânone. Alguns pressupostos teóricos foram estabelecidos para que se pudesse minimamente (e no que concerne a uma dissertação de mestrado) "dar conta" do trabalho, sem pretensões de esvaziar o objeto; esta pesquisa continua (e permanecerá) aberta a novas significações.La dissertation ici présentée comprend une analyse des commentaires faits par Ana Cristina Cesar à propos de son exemplaire du livre Reunião, de Carlos Drummond de Andrade. La démarche a été de travailler les aspects marginaux à partir d'une logique du supplément derridien dans un effort de détermination qui a toujours prétendu revenir à la poésie, surtout celle de Ana C. La procédure se justifie comme méthode choisie car celle-là permet une ouverture des écritures par la confrontation et en direction opposée à ce qui pourrait être identifié comme une influence du canon. Certains concepts théoriques préalables ont été établis pour rendre minimalement possible (en ce qui concerne une dissertation de master) "une procédure complète"; sans prétention de vider l'objet ; cette recherche continue (et perdurera) ouverte à des nouvelles significations
Hypertrophic donavanosis in a young pregnant woman
No full textBACKGROUND:
Donovanosis is a chronic bacterial illness, progressive and indolent, which normally attacks the skin and mucous membranes in the genital and perigenital regions.
CASE:
An 18-year-old pregnant female presented with large, hypertrophic lesions in the ano-genital region. HIV serology was negative. Pap smear revealed a CIN 1 associated with HPV infection. Biopsy yielded macrophages laden with Gram-negative Donovan bodies.
SUMMARY AND CONCLUSION:
A diagnosis of vulvar and perianal donovanosis was reached; the patient decided to terminate the pregnancy and was treated with azithromycin, which led to clinical resolution
Gene Expression Analysis in Human Fetal Endothelial Cells in Physiological Pregnancy and in Intra-Uterine Growth Restriction (IUGR)
No full textHigher mitochondrial dna content in human IUGR placenta
No full textIUGR has been associated to a specific placental phenotype with reduced uptake of specific nutrients. Recently, it has been hypothesized that IUGR may be determined during early gestation. This period is characterized by decidual trophoblast invasion and by intense cellular growth, replication and differentiation. Since a huge energetic availability is required during gestation, we hypothesize that mitochondria may play a crucial role in this process being the main energetic producer in the cell. The aim of this study was to investigate the role of mitochondria in IUGR pathogenesis, evaluating the number of mitochondrial DNA copies (mtDNA) in IUGR placentae compared to controls. Placental samples were collected from 50 singleton pregnancies at the time of elective caesarean section. Twenty-six pregnancies were controls with normal intrauterine growth (AGA) and 24 were studied after the in utero diagnosis of IUGR. All samples were analyzed by real-time quantitative PCR and statistical analysis was performed by non-parametric tests. The median value of mitochondrial DNA content (IQR) in AGA and IUGR placentae was significantly different (455 and 698, respectively, p = 0.004). The cell types responsible for the difference observed is unknown and it is possible that changes observed in the proportion of cell types may influence this measurement. Moreover, a significant negative relationship was observed between mtDNA and umbilical venous pO2, with the highest levels detected in the most severe IUGR cases according to Doppler findings and to the presence of preeclampsia. These data suggest a relationship between the pathogenesis of IUGR and increased placental mtDNA copies. From our results we can speculate that increased mtDNA represents an adaptation of the metabolic placental mechanism to the calorie restriction of the fetus. Furthermore, we found that this rise was inversely related to oxygen tension in the umbilical vein. Although no specific pathogenetic role can be implied, mtDNA increases with hypoxia in placentas of IUGR
Corrigendum to FGF23-regulated production of fetuin-A (AHSG) in osteocytes [Bone 83 (2016) 35-47]
No full textRefers to: D. Mattinzoli, M.P. Rastaldi, M. Ikehata, S. Armelloni, C. Pignatari, L.A. Giardino, M. Li, C.M. Alfieri, A. Regalia, D. Riccardi, P. Messa
FGF23-regulated production of Fetuin-A (AHSG) in osteocytes
Bone, Volume 83, February 2016, Pages 35-4
Human umbilical vein endothelial cells (HUVECs) isolation by gravitational fieldflow fractionation: a tag-less method as a starting point for gene expression analysis
No full text- …
