4 documents found, page 1 of 1
Additive manufactured Poly("-caprolactone)-graphene scaffolds: Lamellar crystal...
Biscaia, Sara; Silva, João C.; Moura, Carla; Viana, Tânia; Tojeira, Ana; Mitchell, Geoffrey R.; Pascoal-Faria, Paula; Ferreira, Frederico CasteloUnderstanding the mechano–biological coupling mechanisms of biomaterials for tissue engineering is of major importance to assure proper scaffold performance in situ. Therefore, it is of paramount importance to establish correlations between biomaterials, their processing conditions, and their mechanical behaviour, as well as their biological performance. With this work, it was possible to infer a correlation be...
Effect of Hydrodynamic Forces on meso‐(4‐Sulfonatophenyl)‐Substituted Porphyrin...
El‐Hachemi, Zoubir; Balaban, Teodor Silviu; Campos, J. Lourdes; Cespedes, Sergio; Crusats, Joaquim; Escudero, Carlos; Kamma‐Lorger, Christina S.The J aggregates of 4‐sulfonatophenyl<jats:italic>meso</jats:italic>‐substituted porphyrins are non‐covalent polymers obtained by self‐assembly that form nanoparticles of different morphologies. In the case of high aspect‐ratio nanoparticles (bilayered ribbons and monolayered nanotubes), shear hydrodynamic forces may modify their shape and size, as observed by peak force microscopy, transmission electron micros...
Preparation and Characterization of Films Based on Alginate and Aloe Vera
Brás Pereira, Rúben Filipe; Tojeira, Ana; Barroso de Moura Cipreste Vaz, Daniela; Mendes, Ausenda; Bartolo, Paulo; Mendes, AusendaSodium alginate films with aloe vera extract were prepared by the casting/solvent evaporation technique. The resulting films were characterized by differential scanning calorimetry, Fourier transform-infrared spectroscopy, scanning electron microscopy, and mechanical and water absorption tests. The in vitro degradation of the films was also investigated over 14 days. Results show that aloe vera contributes to b...
Monitoring the modifications of Aloe vera by high performance liquid chromatogr...
Tojeira, Ana; Pereira, Rúben; Bártolo, Paulo; Mendes, Ausenda; Vaz, Daniela; Oliveira, Nelson SimõesAloe vera is a widely known and studied plant due to its therapeutic properties. The therapeutic properties exhibited by the Aloe vera exudates have been associated to the presence of certain compounds, such as, chromones, anthrones and anthraquinones. In this study, we have identified, and monitored by reversed phase high performance liquid chromatography (HPLC), six major compounds present in the Aloe vera ex...