Scannig
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. CompÃsitos de Poli (Metacrilato de Metila) / nanofolhas de grafite: preparaÃÃo, caracterizaÃÃo e efeitos radiolÃticos / Nanocomposites of Poly (Methyl Metacrylate)/Graphite nanosheets: Preparation, Characterization and Radiolytic Effects
Nowadays there is a great interest in the preparation of PMMA/graphite composites, el ther in graphite powder or in nanosheet forms. They are used mainly in the production of conducting composites. In this work graphite nanosheets were obtained by chemical intercalation using H2SO4 and HNO3. After this treatment, the intercalated graphite (GIC) is put into a
Publicado em: 2007
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2. The use of CO2 laser in dental caries prevention / O uso do laser de CO2 na prevenção da carie dentaria
The irradiation of dental enamel by CO2 laser, especially if combined with fluoride, increases the enamel acid resistance. Thus, this thesis, comprised by 3 manuscripts, aimed: (1) to describe the characteristics of the CO2 laser and to review the literature with regard to its effects on caries inhibition in enamel and dentin. Another aim of this review is t
Publicado em: 2005
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3. Study of the Ti-6Al-4V/TiO2 interface by scannig electron microscopy. / Estudo da interface Ti-6Al-4V/TiO2 por microscopia eletrônica de varredura.
Ti-6Al-4V alloy has been used with some success as biomaterial with applications in the field of dentistry and orthopaedics. The features with make the Ti-6Al-4V alloy such an interesting material are its good corrosion resistance in the biological environment, combined with an excellent degree of biocompatibility. The long-term biological effects of the slo
Publicado em: 2000
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4. Geoquimica e impacto ambiental do arsenio no Vale do Ribeira (SP-PR)
The sedimentary and volcanic rocks of the Ribeira Valley, in the Apiaf FoId Belt, host a variety of PbZn deposits, which were formed by singenetic (Perau-type) and epigenetic (Panelas-type) models. Long-term mining activities originated a toxic contamination by arsenic in the stream sediments of the Ribeira de Iguape river that drains the region. The purpose
Publicado em: 1997
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5. Resistencia a fadigas de ligas do sistema Co-Cr, submetidas ou não a procedimentos de refusão e soldagem
The aim of this study was to evaIuate the fatigue strength of Steldent, Dentorium and Biosil partiaI denture framework Co-Cr based alloys, as new and in mixture of new and previously casted alloy, submitted or not to convencional soldering procedure. Forty rods with 1,7mm in diameter were casted with oxi-acetilene torch for each of the alloys tested. Half sp
Publicado em: 1995