948 resultados para Alterações climáticas


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Pós-graduação em Medicina Veterinária - FCAV

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The purpose of this study is to reflect on some formally similar lexical units belonging to different foreign languages that although having had the same origin, their meanings today are considerably different from their original meanings. This complex process is understood, however, when a diachronic path of these lexical units is established in order to find justification or probable occurrences for the causes that triggered the semantic changes observed. These reflections aim to foster discussion about the consequences of such changes in the emergence of the so-called “false cognates”.

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Pós-graduação em Fisiopatologia em Clínica Médica - FMB

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Pós-graduação em Ciências Biológicas (Botânica) - IBB

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Pós-graduação em Ciências Biológicas (Genética) - IBB

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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O exame radiográfico é um procedimento simples e relativamente barato que pode ser utilizado para observação de estruturas ósseas e tecidos moles, incluindo suas alterações, sendo muito empregado em casos de suspeita de aumento de volume ósseo devido a tumores e inflamações. Osteossarcoma e osteomielite, além de causarem a alteração radiográfica acima citada, possuem imagem radiográfica muito semelhante na maioria dos casos, como proliferação e/ou lise óssea, presença do triângulo de Codman e perda do padrão trabecular ósseo, além de sintomas clínicos similares como claudicação e possível presença de fraturas patológicas. A necessidade de se realizar outros métodos de exame complementar paralelos à radiografia é muito importante na determinação de um diagnóstico seguro, o que implica em um tratamento precoce da doença evitando-se assim grande piora no estado geral do paciente. Esta revisão sistemática de literatura visa a comparação radiográfica entre osteomielite e osteossarcoma em cães, para auxilio do médico veterinário na diferenciação de seu diagnóstico.

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O maior rio do Estado de São Paulo, o Rio Tietê, teve, na Região Metropolitana de São Paulo, suas áreas de várzeas tomadas pelo processo de urbanização e metropolização da população. Parte de suas terras inundáveis passou por processos de aterramento e impermeabilização para que a instalação de indústrias e infraestruturas fosse possível. A APA da Várzea do Rio Tietê foi criada para controlar o processo de ocupação do entorno do rio e na tentativa de amortecer as enchentes causadas por tempestades, cada vez mais constantes. Essas chuvas torrenciais são causadas pela influência das Ilhas de Calor da RMSP com o encontro de brisas marítimas, e causam inundações e destruições

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Pressure vessels are equipments that require a great care because of their high cost and human life risk in case of fail, and its fabrication methods are different for each manufacturer. Normally, pressure vessels and its parts are fabricated by welding, which may change local properties of metals. The head of a pressure vessel is a very important structural component and it is fabricated by welding and mechanical conformation. Because its excellent mechanical properties, de steel A-516 Grade 70 is often used in manufacturing of large pressure vessels that are subjected to high pressure and temperature, but was verified that its mechanical resistance is decreased when submitted to a tension relief heat treatment. By experience it was defined that before mechanical conformation of the head of a large pressure vessel, the steel should be submitted to a stress relief heat treatment in order to facilitate the mechanical conformation, but there is no quantitative analysis to prove this method and study its possible risks. In the present work the steel A-516 Grade 70 demonstrated a decrease of its mechanical resistance when submitted to a stress relief heat treatment, but keeping above the minimum limit defined in the literature. By other side its ductility was substantially increased, being possible to deduce that the stress relief heat treatment before mechanical conformation is a viable e recommended technique, but with reservations. With the data acquired during the fabrication e preparation of the specimen and the result of the tests, it was possible to elaborate a welding procedure that provides the same results obtained in this present work

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The aim of this study was to evaluate the facial profile changes due to natural growth and induced by Herbst appliance and Bionator in the treatment of Class II, division 1 malocclusion. In order to do that, we used a sample of 90 lateral radiographs of 45 individuals in pre-pubertal stage, divided up in two experimental groups and one control. The first group, composed of 15 brazilian individuals, with initial mean age of 9.4 years, was treated with the Herbst appliance for a period of seven months. The second experimental group consisting of 15 brazilian individuals, initial mean age of 9.9 years has gone through bionator therapy for an average period of 21 months. The control group of 15 individuals, who were not treated orthodontically, comes up from the Burlington Growth Centre, University of Toronto, Canada. The intragroup comparison was performed using the Student t test and intergroup comparisons by ANOVA complemented by the Bonferroni test. The results have shown that only the group treated with the Herbst appliance presented significant changes in facial profile with improvement of its convexity and lower lip protrusion.

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The aim of this study was to evaluate the vertical and horizontal dentoskeletal changes induced by the Klammt Open Elastic Activator in the treatment of the Class II Division 1 malocclusion. The sample of 34 children was divided into two groups of 17 subjects each (ten girls, seven boys), matched by age and gender and with an initial mean age of 8.5 years. The data was analyzed using a Student's t-test for intragroup and intergroup comparison. The results showed that the appliance promoted dentoalveolar restriction of the maxilar growth within normal anteroposterior and vertical growth of the maxillary apical base; increment in the vertical displacement the mandibular symphysis associated with normal horizontal growth of the mandible; palatal tipping of the upper incisors; restriction of the anterior migration of the upper molars; greater eruption pattern and normal anterior displacement of the lower incisors and molars. It was concluded that Klammt appliance induce changes that are predominantly horizontal dentoalveolar in upper arch and vertical dentoalveolar in lower arch and vertical skeletal changes in the mandible.