Efeitos da administração em longo prazo do omeprazol sobre a densidade mineral óssea e as propriedades mecânicas do osso

Objectives: Epidemiological studies have shown a relationship between long-term use of proton pump inhibitors and bone metabolism. However, this relationship has not yet become established. The aim of the present study was to analyze the mechanical properties and bone mineral density (BMD) of rats that were subjected to long-term omeprazole use. Methods: Fifty wistar rats weighing between 200 and 240 g were divided equally into five groups: OMP300 (omeprazole intake at a dose of 300 moL/kg/day); OMP200 (200 moL/ kg/day); OMP40 (40 moL/kg/day); OMP10 (10 moL/kg/day); and Cont (control group; intake of dilution vehicle). The solutions were administered for 90 consecutive days. After the rats had been sacrificed, their BMD, the mechanical properties of the dissected femurs and their serum Ca++ levels were analyzed. Results: The BMD of the OMP300 group was lower than that of the controls (p = 0.006). There was no difference in comparing the OMP200, OMP40 and OMP10 groups with the controls. The maximum strength and rigidity of the femur did not differ in the experimental groups in comparison with the controls. The OMP300 group had a statistically lower serum Ca++ concentration than that of the controls (p = 0.049), but the other groups did not show any difference in relation to the controls. Conclusion: Daily intake of 300moL/kg/day of omeprazole decreased the BMD of the femur, but without changes to the rigidity and strength of the femur in adult rats. © 2

Densidade, seleção de micro-habitat e distribuição de Phylloscartes eximius (Aves: Tyrannidae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Densidade mineral óssea, exercício físico no lazer e composição corporal em mulheres pós-menopausa: estudo com usuárias do Sistema Único de Saúde

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Algumas tendências das publicações relacionadas à Astronomia em periódicos brasileiros de ensino de Física nas últimas décadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Diretrizes projetuais e o emprego das tendências: o design de móveis residenciais no polo de Arapongas/PR

Constant social, cultural and political changes influence directly people’s life and define their needs and tastes. Trends have the role of signaling through these facts people’s preferences regarding to objects and can, therefore be connected with great design, as it works with project that is a planning activity for future. In this context, this study aimed to characterize trend jobs in Brazilians home designing methodology. For both: theoretical aspects were studied that led to reasoning, a field research in five Furniture industries Pole of Arapongas/PR was done, and a research for possible developmental reference of furniture in Brazil. Results indicated: misused and mistaken concepts of trend and ignorance on how they operate lack of knowledge about industries sector consumer profile, the concern about sales and not with consumer as “furniture user” and finally, the existence of Brazilian referential sources, but the lack of skilled professionals that could decode these sources.

Degradação de geomembranas de polietileno de alta densidade (HDPE) após exposição à intempérie e lixívia

This paper presents some results of MFI and OIT tests performed on HDPE geomembranes of 0,8 and 2,5 mm that were exposed to weathering effects and leachate after 30 months (2,5 years). The aim of this work is the evaluation of the oxidative degradation process by comparison of fresh and exposed samples results. The expositing and tests were performed according the following standards recommendations: ASTM D1435 (weathering), ASTM D5747 e D5322 (leachate), ASTM D1238 (MFI) e D3895 (OIT). The results shows, for instance, that the MFI values presented high increases on the HDPE (2.5 mm) showing that polymeric chain break occurred for both exposures and, therefore, oxidative degradation. Concerning the OIT values all the geomembranes presented very low values even in the fresh samples. This demonstrates that there wasn’t an antioxidant package appropriate for these membranes.

Uso da cromatografia gasosa para avaliação da difusão em membrana de Polietileno de Alta Densidade (pead) em contato com hidrocarboneto

The constant petrol fuel leak in gas stations has caused concern in many countries around the world. Those fuels have toxic organic compounds in their composition, like Polycyclic Aromatic Hydrocarbons (PAH), which are harmful to the human health. In this work the efficiency of the protection layer with a High Density Polyethylene (HDPE) membrane of 2.5 mm thickness was evaluated. The study was based in the diffusive process in the intact membrane by a permeameter developed to evaluate the diffusive process. The membrane was putted in the middle of the system to separate two sides: a local soil impregnated with diesel oil (in one side) and pure water (in the other side). The chromatography technique was conducted to evaluate the contamination in the pure water. The analyses were made monthly in a total period of 6 months of research. The results tests show that the membrane was less effective to antracene and naphthalene compounds. Despite that, the results showed that the HDPE membrane is a good alternative to prevent contamination of water and soil by the compounds under study up to one year, based on the performance in the time of study.

Uma experiência didática sobre viscosidade e densidade

In this work, a teaching experience is proposed in order to evaluate and differentiate, in a simple and clear way, two intrinsic properties of matter that make part of daily vocabulary, viscosity and density. To this end, three liquids for domestic use have been chosen, namely saccharose solution, biodegradable detergent and vegetal soybean oil. The results analysis evidences the lack of a proportional relationship among these properties.

Convergência, jovens digitais e tendências para a recepção radiofônica no século XXI

The paper aims to present a theoretical and applied analysis of the relationship of the young members of Generation Internet with forms of reception of content defined in the current scenario of convergence of media and languages. The paper aims at highlighting the direct relationship of these young people with the radio, and present data that can serve as reference for the current research on reception and media culture. Para ello, los datos de una investigación empírica sobre los hábitos, las formas y los niveles de consumo con los modelos de interferencias directas y procesos de gestión se presentan hasta hoy.

Efeitos das correlações inter-átomos adsorvidos na densidade de estados do grafeno

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Investigação de técnicas para o acompanhamento do desgaste de um par engrenado utilizando tribologia e análise da resposta dinâmica processada via função densidade probabilidade Beta

Pós-graduação em Engenharia Mecânica - FEIS

Influência de diferentes substratos sobre a composição, a densidade e as interações tróficas do zooplâncton em lagoas de policultivo de camarão-de-água-doce Macrobrachium amazonicum e tilápia-do-nilo Oreochromis niloticus

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As novas tendências da gestão escolar no Brasil nas últimas décadas

Atualmente versam no campo da educação inúmeras discussões, dentre elas a questão da gestão escolar e sua atuação nas instituições de ensino, públicas, privadas ou outras. Um aspecto, portanto que inquieta esta pesquisa, são os estudos sobre administração escolar e quais são as novas tendências da gestão escolar para atenderem as exigências da sociedade moderna. Paira sobre tal inquietação a necessidade de identificar, descrever e refletir sobre o que os novos estudiosos da administração escolar têm pensado sobre as formas atuais de se administrar as instituições de ensino nas últimas décadas. Para tanto, uma pesquisa bibliográfica norteará este trabalho, tornando possível conhecer e refletir sobre tais pensamentos, para beneficiar a todos os gestores, educadores e indivíduos diretamente envolvidos no processo educacional das instituições de ensino

Influência do peso, volume e densidade absoluta da placenta no peso dos recém-nascidos de gestantes portadoras de hipertensão arterial ou Diabetes Mellitus

Influence of weight, volume and absolute placental density on the weight of newborns of pregnant women with arterial hypertension or Diabetes Mellitus