https://ri.ufs.br/jspui/handle/riufs/172 2026-07-11T04:48:42Z https://ri.ufs.br/jspui/handle/riufs/25496 Título: Efeito da remoção e reinserção de hastes tipo force-closed nas deformações da artroplastia total de quadril Autor(es): Griza, Sandro; Gomes, Luiz Sérgio Marcelino; Cervieri, André; Strohaecker, Telmo Roberto Abstract: Objectives: This study investigated removal of a force-closed stem, done in order to improve acetabular exposure during revision, with reinsertion afterwards. It is unknown how much this procedure modifies the stem/cement interface. Methods: Three tapered stem models were implanted into composite femurs. Strain gauges were embedded in the medial aspect of the cement mantle and in several positions on the outer surface of the femurs. The deformation was measured during static loading, which was applied at two different times: after implantation and after one million loading cycles, followed by stem removal and reinsertion. The t test was performed. The differences in deformation were compared (at p ≤ 0.05) between the two static loading times and among the three stem designs. Results: No significant differences in deformation were found after the two loading times for the three models. No significant differences in the initial deformations of the three models were found for most of the gauges attached to the femurs. Conclusions: Reinsertion of the force-closed stem does not alter the load transmission from the stem to the cement and to the surface ofthe femur, even after one million loading cycles. 2016-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/25075 Título: Structural and mechanical properties of Zr-Si-N thin films prepared by reactive magnetron sputtering Autor(es): Freitas, Flávio Gustavo Ribeiro; Hübler, Roberto; Soares, Gabriel; Conceição, Amanda Gardênia Santos; Vitória, Edson Reis; Carvalho, Renata Gomes; Tentardini, Eduardo Kirinus 2015-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24739 Título: Effects of adding some natural substances to biodiesel to control its effect on carbon steel corrosion Autor(es): Santana, Paulo Moura Bispo de; Meira, Marilena; Tentardini, Eduardo Kirinus 2015-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24454 Título: Highlights on the effects of graphene-family materials dispersion on hydration and mechanical properties of cement-based materials Autor(es): Prudente, Isis Nayra Rolemberg; Santos, Hericles Campos dos; Fonseca, Jander Lopes; Oliveira, Jéssica Fernanda Ribeiro; Shibutani, André Balbino; Gimenez, Iara de Fátima; Santos, Euler Araujo dos; Barreto, Ledjane Silva Abstract: Graphene-family materials (GFMs) have gained notoriety in academic research due to their ability to improve the mechanical properties of cementitious matrices and provide new functionalities to conventional systems, such as self-healing properties. However, the use of GFMs faces challenges due to the difficulty of these materials dispersing properly in cementitious matrices, often resulting in the agglomeration of nanomaterials. This tendency to agglomerate directly impacts critical properties of cementitious matrices such as workability and mechanical strength. Therefore, several research studies are being conducted to address dispersion issues and understand the interactions between GFMs and their matrices. However, the literature still lacks consensus on important topics, such as the parameter definitions that influence the cement hydration reaction rate, the factors affecting workability, the cement/GFMs interaction models, the type and optimal amount of GFMs to be used for each system, the characteristics of those GFMs (type and amount of functional groups, presence or absence of defects), and how differences in matrices and dispersants affect mechanical strength parameters. Finally, this work synthesizes the current knowledge on the effects of GFMs and their dispersion on cementitious properties, while also providing an assessment of the limitations of meta-analytical approaches in this field. 2025-11-01T00:00:00Z