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Avec Hannah Arendt, nous avons identifié la rhétorique comme la forme spécifique du discours politique ; alors que la dialectique apparaît comme appropriée au discours philosophique. La rhétorique est destinée à la persuasion. Avec elle, le but est d'imposer le point de vue de l'un sur celui des autres. Avec la dialectique, ce qui est recherché, c´est parler de quelque chose avec quelqu'un. Ainsi, alors que la rhétorique produit le pouvoir de l'un sur l'autre, la dialectique favorise l'amitié avec l'autre. Entre ces deux façons de parler, où situer le discours de l'enseignant dans la salle de classe ? Pour tenir compte de cette question, nous avons d’abord caractérisé la rhétorique et la dialectique. Ensuite, nous avons préparé un tableau en les comparant. Enfin, nous essayons de voir ce qu’il peut arriver lorsque nous les relions au discours de l'enseignant dans la classe. Le discours de l'enseignement lié à la rhétorique, même s´il favorise la connaissance, vise, en dernier lieu, le pouvoir. D'où l'importance du passage par l'ironie comme recours en faveur de la dialectique, qui, au lieu du pouvoir de l'un sur l'autre, crée l'amitié fondée sur le respect et la confiance de l´un avec l'autre. We have identified with H. Arendt (1993) rhetoric as a specific mode of the political discourse, whereas dialectic comes as an appropriate mode to the philosophical discourse. Rhetoric aims at persuasion. There the objective is to impose someone’s point of view over that of someone else. With dialectic what is aimed at is to discuss something with someone. While rhetoric brings up power of some over others, dialetic favours friendship. Between these two modes of discourse, which should the teacher’s discourse favour in the classroom? To reach some conclusion, we first characterize rhetoric and dialectic. Then we prepare a table comparing them. Last but not least, we endeavour to realize what may happen when we attach these to the teacher’s discourse. The rhetoric teacher’s discourse, although helpful in the learning process, aims at, ultimately, the exercise of power. Hence the importance of a slight use of irony as a resource to look askance at rhetoric in favour of dialectic which, instead of a relation of power, creates friendship, based on respect and trust of one in the other.

In this work, we reflect the question: how is possible for the artist to communicate the meaning of his work? The objective is to show that this communication became possible through the conquest, by the artist, of his style. The style rises in the perception of the artist. It is, thus, the vision of world of the artist, that make visible in his works. The painting, in this way, speaks, that is, it communicates orit means, but its voice, composed by the diacriticity of colours and traces, it is still voiceof silence. Going forward with the question of the possibility to communicate the meaning of our experience of the world, we will approach the expression in its linguistic face, through the literary composition. When concluding the work, for the samediacriticity that makes with that the painting speaks, we will arriveat the silence of thelanguage in literature. Neste trabalho, refletimos a pergunta: como é possível para o artista comunicar o sentido de sua obra? O objetivo é mostrar que esta comunicação se torna possível através da conquista, pelo artista, de seu estilo. O estilo nasce na percepção do artista. Ele é, assim, a visão de mundo do artista tornada visível em suas obras. A pintura, deste modo, fala, isto é, comunica ou significa, mas sua voz, composta pela diacriticidade de cores e traços, é ainda voz do silêncio. Com o intuito de avançar na questão da possibilidade de comunicar o sentido de nossa experiência do mundo, passaremos à expressão em sua face linguística, abordando a obra literária. Ao concluir o trabalho, pela mesma diacriticidade que faz com que a pintura fale, chegaremos ao silêncio da linguagem na literatura.

Algumas fachadas de edificacoes residenciais e comerciais tem apresentado problemas sistemicos de estufamento e consequente descolamento do revestimento cerâmico. Exemplo disto cita-se o caso de uma edificacao residencial, na cidade do Recife-Pe, cuja idade de construcao e de 30 anos e vem apresentando problema generalizado de descolamento da cerâmica da fachada conduzindo o condominio a optar pela troca total do revestimento de acabamento final. Desta forma o trabalho avaliou se a camada de emboco ainda possui condicoes tecnicas para receber um novo revestimento semelhante ao sistema ja existe. A avalicao foi realizada por meio de inspecao visual, levantamento do historico dos problemas e ensaio para determinacao da resistencia de aderencia a tracao do emboco, segundo a ABNT NBR 13528:2010. Com base no criterio normativo, apenas 1 (um) resultado, dentre 84 pontos de ensaio, apresentou valores acima de 0,3 MPa, o que confirma a inadequacao da argamassa de emboco original do predio.

Copper/aluminum alloys are largely utilized in odontological restorations because they are less expensive than gold or platinum. However, tarnishing and important corrosion in intrabuccal prostheses made with copper/aluminum alloys after 28 days of use have been reported. Several kinds of food and beverage may attack and corrode these alloys. Copper is an essential component of several important enzymes directly involved in mitochondrial respiratory metabolism. Aluminum, in contrast, is very toxic and, when absorbed, plasma values as small as 1.65 to 21.55 µg/dl can cause severe lesions to the nervous system, kidneys, and bone marrow. Because mitochondria are extremely sensitive to minimal variation of cellular physiology, the direct relationship between the mitocondrial respiratory chain and cell lesions has been used as a sensitive parameter to evaluate cellular aggression by external agents. This work consisted in the polarographic study of mitochondrial respiratory metabolism of livers and kidneys of rabbits with femoral implants of titanium or copper/aluminum alloy screws. The experimental results obtained did not show physiological modifications of hepatic or renal mitochondria isolated from animals of the three experimental groups, which indicate good biocompatibility of copper/aluminum alloys and suggest their odontological use. Ligas do sistema cobre/alumínio são, atualmente, muito usadas em odontologia restauradora, principalmente devido aos seus baixos custos. Porém sofrem manchamento e corrosão quando utilizadas por mais de 28 dias, de modo intrabucal, em humanos, além do que são atacadas por vários tipos de alimentos e de bebidas. O cobre é essencial para a atividade de várias enzimas importantes, diretamente envolvidas com o metabolismo mitocondrial. O alumínio, ao contrário, é muito tóxico. Pequenas quantidades plasmáticas são capazes de causar graves lesões no sistema nervoso, rins e medula óssea. As mitocôndrias são extremamente sensíveis às mínimas variações da fisiologia celular. As relações diretas existentes entre o metabolismo respiratório mitocondrial e as lesões celulares, têm sido usadas como um parâmetro muito sensível para a avaliação das agressões às células, decorrentes de agentes externos. Este trabalho consistiu nos estudos polarográficos do metabolismo respiratório mitocondrial, a partir de fígados e rins de coelhos, em cujos fêmures foram implantados parafusos confeccionados com ligas de titânio e de cobre/alumínio. Os resultados encontrados não mostraram modificações fisiológicas nas mitocôndrias hepáticas ou renais isoladas dos animais componentes dos diferentes grupos experimentais. Eles indicam uma boa compatibilidade para as ligas de cobre/alumínio e sugerem suas utilizações em odontologia restauradora.

The prominence of fibrocystic change of the breast mandates knowledge of pathophysiology, diagnosis, and treatment on the part of all providing primary care to women. This article reviews cystic, epithelial hyperplastic, and fibrotic changes common to fibrocystic change and fibrocystic disease of the breast. Diagnostic modalities including physical examination technique and needle aspiration are presented, together with the rationale for ultrasonography and mammography. A broad spectrum of treatment options is presented for the clinician.

• Skin testing as an in vivo means of evaluating cell-mediated immune function is extremely valuable. However, problems lie in selecting the appropriate antigens and interpreting the results. The suggestion that diphtheria-tetanus would provide a good antigen in infants and children was evaluated by comparing skin test observations with results of skin biopsy examinations. Thirteen subjects, seven of whom were immunodeficient, were evaluated by skin reactions and dermal biopsy specimens. Fifty percent of the immunodeficient patients had positive skin test reactions but had biopsy specimens that were not consistent with delayed-type hypersensitivity (DTH). Although all normal controls on whom biopsies were done had histologic DTH reactions, two had negative or equivocal skin reactions. Our data suggest, on the contrary, that delayed hypersensitivity testing with this antigen is not a good screening test for disorders of immunity or inflammation. (Am J Dis Child134:479-483, 1980)

An unusual case of pheochromocytoma associated with multifocal medial fibromuscular dysplasia of the left subclavian (ruptured), celiac, and bilateral renal arteries is described. Additionally, the coronary arteries, left renal arcuate vessels, and peripancreatic and intracolonic muscular arteries revealed intimal fibroplasia. Thirty-three cases of pheochromocytoma associated with renal artery stenosis have been reported, including four instances radiologically attributed to fibromuscular dysplasia. Renal artery fibromuscular dysplasia associated with pheochromocytoma has not been histologically documented, and extrarenal fibromuscular dysplasia with simultaneous pheochromocytoma has not been previously described. Current etiologic concepts of fibromuscular dysplasia and possible pathogenetic mechanisms for its occurrence with pheochromocytoma are discussed.