Space Debris
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Can intra-radicular cleaning protocols increase the retention of fiberglass posts? A systematic review
Abstract The presence of residues within the root canal after post-space preparation can influence the bond strength between resin cement and root dentin when using fiberglass posts (FGPs). Currently, there is no consensus in the literature regarding what is the best solution for the removal of debris after post-space preparation. This systematic review invo
Braz. oral res.. Publicado em: 15/03/2018
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2. Estudo de modelos e condições iniciais da geração a priori de detritos espaciais e sua propagação orbital / Study of models and initial conditions of a priori generation of space debris and their orbital propagation
Currently, it is estimated that there are hundreds of thousands of space debris, of various sizes, around the Earth. The space debris, also known as orbital debris, can remain in orbit with other bodies for a long time; and can cause risks of collision, including with space vehicles still in operation. In addition, there are risks of potential accidents by r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/04/2011
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3. Trabalhadores do "lixo": a organização das cooperativas de catadores de materiais recicláveis em São Paulo 2000/2005
This research sought register the experience of deploying cooperatives of collectors recyclable materials in the city of São Paulo, between the years 2000 and 2005. The recycling of waste is a very current subject, especially considering the emergence of global concerns with the emissions of pollutants, in clear contradiction with the capitalist society who
Publicado em: 2008
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4. Parâmetros de resistência do solo para dimensionamento de sistemas de drenagem em estradas não pavimentadas / Parameters of soil resistance for drainage systems dimensioning in non-paved roads
This work was developed mainly aiming the determination of the erodibility and the critical shear stress in non-paved roads, focusing on the reduction of the eminent risks of occurring erosion in these roads, based upon a drainage system dimensioning using local resistance values. In order to achieve these values a yield simulator was built, which model cons
Publicado em: 2008
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5. "Geographic Cosmography: the astronomy in geography teaching" / "Cosmografia geográfica: a astronomia no ensino de geografia"
This research relates Astronomy Teaching to Geography Teaching and approaches a great number of subjects that express important relations between the terrestrial knowledge and the celestial knowledge. We have studied a field that is part of Cosmography and consists in a new reading in the Geography area, which is designated as "Geographic Cosmography", inste
Publicado em: 2006
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6. Study of the dynamics of small space debris and meteoroids / Estudo da dinâmica de pequenos detritos espaciais e meteoróides
A exploração e a utilização do ambiente de satélites em órbitas ao redor da Terra tornou-se relevante para o avanço tecnológico nas últimas décadas, mostrando-se de suma importância o conhecimento do fluxo e da dinâmica de partículas de meteoróides e detritos espaciais que possam afetar o desempenho adequado de missões espaciais. O objetivo de
Publicado em: 2005
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7. Estudo da dinâmica de pequenos detritos espaciais e meteoróides / Study of the dynamics of small space debris and meteoroids
A exploração e a utilização do ambiente de satélites em órbitas ao redor da Terra tornou-se relevante para o avanço tecnológico nas últimas décadas, mostrando-se de suma importância o conhecimento do fluxo e da dinâmica de partículas de meteoróides e detritos espaciais que possam afetar o desempenho adequado de missões espaciais. O objetivo de
Publicado em: 2005
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8. Estudo imunocitoquimico das catepsinas D e B em celulas trofoblasticas gigantes de camundongos
The trophoblastic giant cells (TGC) differentiate from trophectoderm sheets or from the ectoplacental cone of mouse embryos and are committed to blastocyst implantation and placentation. It has attributed a high invasive capability and phagocytosis to the TGC which degenerate and remove the maternal tissues. However, the exact mechanism controlling their inv
Publicado em: 1997
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9. Fibromatose gengival hereditaria : aspectos morfologicos e ultraestruturais
The ultrastructure of the gingival connective tissue was analysed in 12 patients bearing Hereditary Gingival Fibromatosis (H.G.F.) and compared with normal gingival tis sue from biopsies of 08 volunteers. Some fibroblasts appeared as normal cells, but most of these cells showed minor to severe altered features, up to signs of cell desintegration the main alt
Publicado em: 1991
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10. Retinal pathology in the Kearns-Sayre syndrome.
Examination of the retinal tissues obtained at necropsy from a 14-year-old boy with Kearns-Sayre syndrome showed marked photoreceptor and pigment epithelial cell loss in the retinal periphery and around the optic nerve head. Electron microscopy of surviving retinal pigment epithelial (RPE) cells indicated a loss of apical microvilli and basal infoldings. The
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11. Lung weight parallels disease severity in experimental coccidioidomycosis.
Evidence provided by histopathological study of lesions is a valuable adjunct for evaluating chemotherapeutic efficacy in experimental animal models, In addition, this should be correlated with a measure of disease severity in the same animal. The latter could be obtained by homogenization of infected organs and quantitative enumeration of viable cells of th
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12. Isolation and Characterization of Protoplasts from Saccharomyces rouxii
Cells of the osmotolerant yeast Saccharomyces rouxii were transformed to protoplasts in good yield (85%) by digesting cell walls with snail-gut enzyme in the presence of 10 mM dithioerythritol, 0.1 M sodium phosphate buffer (pH 6.8), and 2.0 M KCl. The requirement for 2.0 M KCl compares with that for S. bisporus var. mellis (another osmotolerant species) and