Browsing by Issue Date, starting with "2016-08-31"
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- Quantum cosmology of scalar-tensor theories and self-adjointnessPublication . Almeida, Carla; Batista, António B.; Fabris, Júlio C.; Moniz, PauloIn this paper, the problem of the self-adjointness for the case of a quantum minisuperspace Hamiltonian retrieved from a Brans-Dicke (BD) action is investigated. Our matter content is presented in terms of a perfect fluid, onto which the Schutz's formalism will be applied. We use the von Neumann theorem and the similarity with the Laplacian operator in one of the variables to determine the cases where the Hamiltonian is self-adjoint and if it admits self-adjoint extensions. For the latter, we study which extension is physically more suitable.
- Stimuli-responsive mesoporous silica nanoparticles for cancer therapy: A reviewPublication . Moreira, André; Dias, Diana Rodrigues; Correia, Ilídio Joaquim SobreiraThe application of nanocarriers as selective drug delivery platforms, as imaging or as diagnostic agents has been evaluated in several studies in the area of biomedicine, namely for cancer therapy. Such systems have the potential to perform a controlled and site-specific delivery of therapeutic agents leading to a reduction of side effects and, ultimately, to an improved therapeutic outcome. Among the different nanocarriers developed so far, mesoporous silica nanoparticles have attracted the attention of the scientific community for being applied as drug delivery systems that are capable of controlling, both in space and time, the drug release. In this review, the modifications performed, so far, on mesoporous silica nanoparticles to imprint them a stimulus responsive behavior (namely, pH, redox potential, adenosine triphosphate, enzyme or temperature) in order to allow their application in cancer therapy are highlighted.