VapB type 8 plasmids in Rhodococcus equi isolated from the small intestine of pigs and comparison of selective culture media

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Titanium-35niobium alloy as a potential material for biomedical implants: in vitro study

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Geoquímica e geocronologia U-Pb e ­Sm-Nd dos ortognaisses da região de Pontalina (GO), Brasil

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

Ortognaisses peraluminosos associados ao grupo Araxá na região de Rochedo, Goiás

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

Structure, microstructure, and selected mechanical properties of Ti-Zr-Mo alloys for biomedical applications

New titanium alloys for biomedical applications have been developed primarily with the addition of Nb, Ta, Mo, and Zr, because those elements stabilize the β phase and they don’t cause cytotoxicity in the organism. The objective of this paper is to analyze the effect of molybdenum on the structure, microstructure, and selected mechanical properties of Ti-15Zr-xMo (x = 5, 10, 15, and 20 wt%) alloys. The samples were produced in an arc-melting furnace with inert argon atmosphere, and they were hot-rolled and homogenized. The samples were characterized using chemical, structural, and microstructural analysis. The mechanical analysis was made using Vickers microhardness and Young’s modulus measurements. The compositions of the alloys were sensitive to the molybdenum concentration, indicating the presence of α’+α”+β phases in the Ti-15Zr-5Mo alloy, α”+β in the Ti-15Zr-10Mo alloy, and β phase in the Ti-15Zr-15Mo and Ti-15Zr-20Mo alloys. The mechanical properties showed favorable values for biomedical application in the alloys presenting high hardness and low Young’s modulus compared with CP-Ti.

Diffusion of oxygen in some binary Ti-Based alloys used as biomaterials

Ti and its alloys are widely used as biomaterials. Their main properties are excellent corrosion resistance, relatively low elastic modulus, high specific strength, and good biocompatibility. The development of new Ti alloys with properties favorable for use in the human body is desired. To this end, Ti alloys with Mo, Nb, Zr, and Ta are being developed, because these elements do not cause cytotoxicity. The presence of interstitial elements (such as oxygen and nitrogen) induces strong changes in the elastic properties of the material, which leads to hardening or softening of the alloy. By means of anelastic spectroscopy, we are able to obtain information on the diffusion of these interstitial elements present in the crystalline lattice. In this paper, the effect of oxygen on the anelastic properties of some binary Ti-based alloys was analyzed with anelastic spectroscopy. The diffusion coefficients, pre-exponential factors, and activation energies were calculated for oxygen and nitrogen in these alloys.

Avaliação do reparo ósseo na interface osso/implante em ratos pinealectomizados: análise histológica, imunoistoquimica, histométrica, biomecânica e por microct

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

Epidemiologia da colonização e infecção microbiana em Unidade de Terapia Intensiva Neonatal: abordagem clínica e molecular

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

Avaliação dos protocolos de diagnóstico e de controle da hiperglicemia materna: impacto na prevalência de Diabetes Melito Gestacional (DMG) e de Hiperglicemia Gestacional Leve (HGL) e nos resultados perinatais

Pós-graduação em Ginecologia, Obstetrícia e Mastologia - FMB

Avaliação comparativa do potencial osteocondutor de quatro diferentes substitutos ósseos em defeitos críticos em calvárias de coelhos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Mutagênese sítio-dirigida da ORF XAC0024 de Xanthomonas citri subsp. citri e suas implicações no desenvolvimento do cancro cítrico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Dissolução redutiva de minério de ferro por Acidithiobacillus ferrooxidans para a recuperação de metais de interesse econômico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)