ISEP – CIETI – Pósteres apresentados a eventos científicos
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Browsing ISEP – CIETI – Pósteres apresentados a eventos científicos by Sustainable Development Goals (SDG) "09:Indústria, Inovação e Infraestruturas"
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- Analyzing Total Hip Arthroplasty: Straight Stem vs Anatomical Stem with Different Materials and ActivitiesPublication . Queirós, Pedro; Gueiral, Nuno; González-Gómez, Carlos David; Gueiral, Nuno[Introduction] Total Hip Arthroplasty involves replacing damaged parts of the hip joint with a prosthetic comprised of an artificial acetabular cup and femoral head. These components, made of durable, low-friction materials, aim to restore mobility, and alleviate pain in patients with hip joint degeneration, such as osteoarthritis or fractures. Utilizing computational mathematical models, such as the finite element method (FEM), it is possible to predict the behavior of materials under simulated loads from common daily activities [1], thereby anticipating potential failures in the femoral stem or the material itself.
- Co-pyrolysis of brown macroalgae and pinecones in a fixed bed reactorPublication . Silva, F.T.; Nascimento, M.; Pilão, R. M.; Neto, M.P.; Ribeiro, A.M.This study presents results on the slow co-pyrolysis of Laminaria digitata (LD) and pinecones (PC), at an average temperature of 560 °C, for mass ratios LD/PC of 100/0, 50/50, 30/70, 10/90 and 0/100. The biochar yields varied from 35.3 to 31.2 %, for bio-oils, the yields were in the range of 23.3 to 39.9 %, and for the gas phase, between 41.4 to 28.9 %, as the amount of PC increased in the feeding mixture. The biochars were characterized in terms of proximate analysis and higher heating value (HHV). The properties of bio-oils that were determined included pH, density and HHV, as well as identification of compounds by infrared analysis. CO2, CO, CH4 and H2 were identified in the gas phase of all the experiments by gaschromatography, but the most produced gas was CO2, followed by CO.
- Effect of mass flow rate and temperature on the gasification of animal fatPublication . Araújo, A.L.; Paiva, E.; Silva, F.T.; Ribeiro, A.; Campos, J.B.L.M.; Pilão, R.M.In this work, gasification of animal fat was studied. Tests were performed with an emulsion of fat and water and temperature and mass flow rate effects were evaluated. Gas chromatography was used to analyze the composition of producer gas. Carbon and hydrogen conversion efficiencies, dry gas yield, cold gas efficiency, and higher heating value of producer gas were determined. The results showed that temperature and mass flow rate determine the composition of the gas obtained and the performance of the gasification process. The gasification parameters increased with the temperature rise. The increase of mass flow rate contributes to a decrease in the overall performance of the gasification process.
- Graphene nanoparticles on refractive index of cancerous breast tissues: spectral approachPublication . Martins, Inês; Ferraz, Maria Pia; Ramos, C.A.; Vilão, G.This work presents a study on the influence of graphene nanoparticles on the refractive index (RI) for application in breast tissues as an aid in the diagnosis of cancerous cells, using a spectral approach to evaluate the behaviour of glycerine and water-based nanofluids in various proportions. Glycerine-water solutions with different volumetric fractions of graphene were prepared, and the RI was measured using an Abbe refractometer. UV-Vis absorption spectra were analysed, indicating that higher volumetric fractions of graphene significantly affect light absorption and scattering patterns. This preliminary study identifies the optimal graphene volumetric fractions for future analyses of light-tissue interaction, aiming to improve diagnostic methods and characterisation of cancerous tissues through light scattering.
- Stability of nanofluids CuO (40nm) in ethylene glycol or water base fluids with CTAB surfactant for biomedical applicationsPublication . Queirós, Ângela; Coelho, Maria de Fátima; Martins, Andreia; Iglesias, T. P.Abstract In this work, some properties of CuO nanofluids in distilled water and ethylene glycol base fluid were studied, comparing the stability of the nanofluid in samples with and without surfactant and measuring the electrical conductivity as a function of temperature and concentration.