11 documents found, page 1 of 2
Self-assembly pathway influence on Dehydropeptide-based gel properties and drug...
Veloso, Sérgio R S; Vijayakanth, Thangavel; Shankar, Sudha; Fridman, Natalia; Rencus-Lazar, Sigal; Hilliou, L.; Rodrigues, Pedro V.; Moura, C.Low-molecular-weight peptide-based hydrogels formed through self-assembly have emerged as promising candidates for biomedical applications. While the self-assembly process is known to affect the network morphology, its impact on mechanical properties and drug delivery remains poorly understood. In this work, it is explored how different gelation conditions influence the morphology, properties, and drug release ...
Extending High Fatty Foods Shelf-Life Protecting from Lipid Oxidation and Micro...
Andrade, Mariana A.; Rodrigues, Pedro V.; Barros, Carolina; Cruz, Vasco; Machado, Ana Vera; Barbosa, Cássia H.; Coelho, Anabela; Furtado, RosáliaThe search for new forms to extend foodstuffs’ shelf-life through the use of natural compounds and extracts continues to grow among researchers and the industry. In this line of thought, the main objective of this work was to develop, characterize and evaluate the effectiveness of an active food packaging based on polylactic acid (PLA) and incorporated with natural extracts obtained from grape and/or pomegranat...
Chitosan/alginate nanogels containing multicore magnetic nanoparticles for deli...
Veloso, Sérgio Rafael Silva; Marta, Eva S.; Rodrigues, Pedro V.; Moura, Cacilda; Amorim, Carlos O.; Amaral, Vítor S.; Correa-Duarte, Miguel A.In this study, multicore-like iron oxide (Fe3O4) and manganese ferrite (MnFe2O4) nanoparticles were synthesized and combined with nanogels based on chitosan and alginate to obtain a multimodal drug delivery system. The nanoparticles exhibited crystalline structures and displayed sizes of 20 ± 3 nm (Fe3O4) and 11 ± 2 nm (MnFe2O4). The Fe3O4 nanoparticles showed a higher saturation magnetization and heating effic...
Bioinspired cyclic dipeptide functionalized nanofibers for thermal sensing and ...
Santos, Daniela; Baptista, Rosa Maria Ferreira; Handa, Adelino; Almeida, B. G.; Rodrigues, Pedro V.; Torres, Ana R.; Machado, A. V.; Belsley, M.Nanostructured dipeptide self-assemblies exhibiting quantum confinement are of great interest due to their potential applications in the field of materials science as optoelectronic materials for energy harvesting devices. Cyclic dipeptides are an emerging outstanding group of ring-shaped dipeptides, which, because of multiple interactions, self-assemble in supramolecular structures with different morphologies ...
Nanostructured electrospun fibers with self-assembled cyclo-L-Tryptophan-L-Tyro...
Santos, Daniela; Baptista, Rosa M. F.; Handa, Adelino; Almeida, B. G.; Rodrigues, Pedro V.; Castro, Cidália; Machado, A. V.; Rodrigues, Manuel J. L. F.The potential use of nanostructured dipeptide self-assemblies in materials science for energy harvesting devices is a highly sought-after area of research. Specifically, aromatic cyclo-dipeptides containing tryptophan have garnered attention due to their wide-bandgap semiconductor properties, high mechanical rigidity, photoluminescence, and nonlinear optical behavior. In this study, we present the development of...
Extending high fatty foods shelf-life protecting from lipid oxidation and micro...
Andrade, Mariana A.; Rodrigues, Pedro V.; Barros, Carolina; Cruz, Vasco; Machado, A. V.; Barbosa, Cássia H.; Coelho, Anabela; Furtado, RosáliaThe search for new forms to extend foodstuffs’ shelf-life through the use of natural compounds and extracts continues to grow among researchers and the industry. In this line of thought, the main objective of this work was to develop, characterize and evaluate the effectiveness of an active food packaging based on polylactic acid (PLA) and incorporated with natural extracts obtained from grape and/or pomegranat...
Evaluation of active LDPE films for packaging of fresh orange juice
Rodrigues, Pedro V.; Vieira, Dalila Assunção Maia; Martins, Paola Chaves; Martins, Vilásia Guimarães; Castro, Maria Cidália Rodrigues; Machado, A. V.Microbial development, enzymatic action, and chemical reactions influence the quality of untreated natural orange juice, compromising its organoleptic characteristics and causing nutritional value loss. Active low-density polyethylene (LDPE) films containing green tea extract (GTE) were previously prepared by a blown film extrusion process. Small bags were prepared from the produced films, which were then fille...
Extending High Fatty Foods Shelf-Life Protecting from Lipid Oxidation and Micro...
Andrade, Mariana A.; Rodrigues, Pedro V.; Barros, Carolina; Cruz, Vasco; Machado, Ana Vera; Barbosa, Cássia H.; Coelho, Anabela; Furtado, RosáliaThe search for new forms to extend foodstuffs’ shelf-life through the use of natural compounds and extracts continues to grow among researchers and the industry. In this line of thought, the main objective of this work was to develop, characterize and evaluate the effectiveness of an active food packaging based on polylactic acid (PLA) and incorporated with natural extracts obtained from grape and/or pomegranat...
Evaluation of plant extracts as an efficient source of additives for active foo...
Vieira, Dalila M.; Pereira, Carla; Calhelha, Ricardo C.; Barros, Lillian; Petrović, Jovana; Soković, Marina; Barreiro, M.F.; Ferreira, Isabel C.F.R.Natural extracts have been used in several traditional medicine applications and culinary purposes. Their biological properties (antioxidant and antimicrobial) are due to the presence of several active aromatic compounds. Herein, different natural extracts were evaluated, namely structural and thermal characterization and biological activity, in its natural form and incorporated into a polymeric matrix, to asse...
Optimization of Au:CuO thin films by plasma surface modification for high-resol...
Proença, Manuela; Rodrigues, Marco S.; Meira, Diana I.; Castro, M. Cidalia R.; Rodrigues, Pedro V.; Machado, A. V.; Alves, Eduardo; Barradas, Nuno P.In this study, thin films composed of gold nanoparticles embedded in a copper oxide matrix (Au:CuO), manifesting Localized Surface Plasmon Resonance (LSPR) behavior, were produced by reactive DC magnetron sputtering and post-deposition in-air annealing. The effect of low-power Ar plasma etching on the surface properties of the plasmonic thin films was studied, envisaging its optimization as gas sensors. Thus, t...