Características da interação no contexto de aprendizagem in-tandem

Pós-graduação em Estudos Linguísticos - IBILCE

Hipertensão arterial experimental e prenhez em ratas: repercussões no peso da placenta e no índice placentário

Objetivo: estudar as repercussões da hipertensão sobre o peso da placenta e índice placentário. Métodos: foram utilizadas 82 ratas virgens da linhagem Wistar em idade de reprodução. Após a indução da hipertensão arterial experimental (Modelo Goldblatt I -- 1 rim-1 clipe) as ratas foram sorteadas para compor os 4 grandes grupos experimentais (controle, manipulação, nefrectomia e hipertensão). A seguir, as ratas foram distribuídas por sorteio em 8 subgrupos, sendo quatro prenhes (P) e quatro não-prenhes. Após acasalamento, dos quatro grupos prenhes obtivemos com o nascimento dos recém-nascidos (RN) os seguintes grupos: RN-C, RN-M, RN-N e RN-H, respectivamente, controle, manipulação, nefrectomizado e hipertenso. Resultados: quanto ao peso da placenta, o do grupo RN-C foi estatisticamente maior que o de todos os demais grupos. Por outro lado, verifica-se que o peso das placentas provenientes do grupo RN-M foi maior que o dos grupos RN-N e RN-H, os quais não diferiram entre si. Os índices placentários dos grupos P-C (Md = 0,1085) e P-M (Md = 0,1110) não diferiram entre si, mas foram menores que os dos grupos P-N (Md = 0,1175) e P-H (Md = 0,1211), os quais também não diferiram entre si. Conclusões: a hipertensão e a nefrectomia unilateral determinaram redução do peso das placentas e aumento do índice placentário, evidenciando repercussões no desenvolvimento placentário e fetal.

Validation of the Brazilian versions of two inventories for measuring oral health-related quality of life of edentulous subjects

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Characterization of silica-carbon mesoporous matrix with embedded nickel nanoparticles synthesized by the polymeric precursor method

Nickel nanoparticles into silica-carbon matrix composites were prepared by using the polymeric precursor method. The effects of the polyester type and the time of pyrolysis on the mesoporosity and nickel particle dispersion into non-aqueous amorphous silica-carbon matrix were investigated by thermogravimetric analysis, adsorption/desorption isotherms and TEM. A well-dispersed metallic phase could be only obtained by using ethylene glycol. Weightier polyesters affected the pyrolysis process due to a combination of more amounts of carbonaceous residues and delaying of pyrolysis process. The post-pyrolyzed composites were successfully cleaned at 200 degrees C for I h in oxygen atmosphere leading to an increase in the surface area and without the occurrence of carbon combustion or nickel nanoparticles oxidation. The matrix composites presented predominantly mesoporous with pore size well defined in 38 angstrom, mainly when tetraethylene glycol was used as polymerizing agent. (C) 2007 Elsevier B.V. All rights reserved.

Age-related histopathological lesions in the Mongolian gerbil ventral prostate as a good model for studies of spontaneous hormone-related disorders

The Meriones unguiculatus (Mongolian) gerbil has demonstrated significant prostatic responses to hormonal treatments, and to drugs against human prostatic hyperplasia Spontaneous neoplasia develops in the older animals. Thirty gerbils (age 18 months) were divided into non-affected and prostatic lesion bearers and the prostate lesions were evaluated morphologically, immunohistochemically and quantitatively. The most frequent changes were in epithelial sites and, namely prostatic intraepithelial neoplasias, microinvasive carcinomas and adenocarcinomas. In the stromal compartment, cellular hyperplasia, when verified, was always associated with the sites of anomalous epithelium. Additionally, larger deposition of collagen fibrils, generating stromal fibrosis, was found in all the old gerbils analysed. The quantitative analysis showed that prostatic tissue proportions differed in altered areas, being specific for each lesion type. Isolated nuclear and nucleolar parameters were not effective in diagnosing the malign potential of lesions. However, the cellular proliferation and death indexes indicated larger cellular turnover in invasive lesions such as carcinomas. With these analyses, it could be verified that old gerbils present high propensity to develop spontaneous prostate changes and this may aid in a better understanding of the biological behaviour of human prostate cancer.

Influence of Y-TZP ceramic treatment and different resin cements on bond strength to dentin

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

The critical barrier to progress in dentine bonding with the etch-and-rinse technique

Objectives: The lack of durability in resin-dentine bonds led to the use of chlorhexidine as MMP-inhibitor to prevent the degradation of hybrid layers. Biomimetic remineralisation is a concept-proven approach in preventing the degradation of resin-dentine bonds. The purpose of this study is to examine the integrity of aged resin-dentine interfaces created with a nanofiller-containing etch-and-rinse adhesive after the application of these two approaches.Methods: The more established MMP-inhibition approach was examined using a parallel in vivo and in vitro ageing design to facilitate comparison with the biomimetic remineralisation approach using an in vitro ageing design. Specimens bonded without chlorhexidine exhibited extensive degradation of the hybrid layer after 12 months of in vivo ageing.Results: Dissolution of nanofillers could be seen within a water-rich zone within the adhesive layer. Although specimens bonded with chlorhexidine exhibited intact hybrid layers, water-rich regions remained in those hybrid layers and degradation of nanofillers occurred within the adhesive layer. Specimens subjected to in vitro biomimetic remineralisation followed by in vitro ageing demonstrated intrafibrillar collagen remineralisation within hybrid layers and deposition of mineral nanocrystals in nanovoids within the adhesive.Conclusions: The impact was realized by understanding the lack of an inherent mechanism to remove water from resin-dentine interfaces as the critical barrier to progress in bonding with the etch-and-rinse technique. The experimental biomimetic remineralisation strategy offers a creative solution for incorporating a progressive hydration mechanism to achieve this goal, which warrants its translation into a clinically applicable technique. (C) 2011 Elsevier Ltd. All rights reserved.

Harmonics filtering and detection of disturbances using wavelets

Traditional mathematical tools, like Fourier Analysis, have proven to be efficient when analyzing steady-state distortions; however, the growing utilization of electronically controlled loads and the generation of a new dynamics in industrial environments signals have suggested the need of a powerful tool to perform the analysis of non-stationary distortions, overcoming limitations of frequency techniques. Wavelet Theory provides a new approach to harmonic analysis, focusing the decomposition of a signal into non-sinusoidal components, which are translated and scaled in time, generating a time-frequency basis. The correct choice of the waveshape to be used in decomposition is very important and discussed in this work. A brief theoretical introduction on Wavelet Transform is presented and some cases (practical and simulated) are discussed. Distortions commonly found in industrial environments, such as the current waveform of a Switched-Mode Power Supply and the input phase voltage waveform of motor fed by inverter are analyzed using Wavelet Theory. Applications such as extracting the fundamental frequency of a non-sinusoidal current signal, or using the ability of compact representation to detect non-repetitive disturbances are presented.

A Escola de Chicago e a sociologia no Brasil: a passagem de Donald Pierson pela Escola Livre de Sociologia e Política de São Paulo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo em corpora de traduções e três glossários bilíngues nas subáreas de anestesiologia, cardiologia e ortopedia

Pós-graduação em Estudos Linguísticos - IBILCE

Socialização linguageira, aspectos culturais e uso de code-switching em uma criança bilíngue

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A reescritura de Katherine Mansfield por Érico Veríssimo: análise descritiva da tradução para o português da obra Bliss and other stories

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação de três cimentos resinosos na resistência de união entre dentina e uma cerâmica de zircônia estabilizada por ítria

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Expectativas em relação aos efeitos do uso de álcool na região metropolitana de São Paulo: uma análise de gênero

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência do meio hiperglicêmico intrauterino em diferentes fases de vida dos descendentes de ratas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)