Encontrados 12 documentos, a visualizar página 1 de 2

Desenvolvimento urbano em zonas costeiras de alto risco : análise da problemáti...

Tese de mestrado. Planeamento e Projecto do Smbiente Urbano. 2005. Faculdade de Engenharia. Universidade do Porto

Produção de micropartículas de alginato contendo Flavobacterium columnare inati...

Alginate microparticles were prepared by an emulsion method aiming oral controlled release of antigens to fish. The effects of emulsification temperature and impeller type on particle morphology, average diameter, and size distribution were evaluated. Microparticles contaning formalin-killed Flavobacterium columnare cells (a model antigen) were prepared and characterized regarding bacterial release and particle...

A coupled convection-diffusion level set model for tracking epithelial cells in...

Colorectal cancer is initiated in colonic crypts as a consequence of alterations leading to the disruption of the normal colonic cellular process. We propose a new model, which couples a convection-di usion type equation with a level set equation, for tracking the time evolution of an epithelial cell set, inside a colonic crypt, until it reaches the top of the crypt. The convection-di usion equation describes t...

A mathematical model for a comprehensive approach to the dynamics of human colo...

In this paper, we propose mathematical models for the growth dynamics of aberrant crypt foci in the human colon, as well as for some of their characteristics, namely the apoptosis and proliferation indices. The models rely on logistic type differential equations and clinical observations at different times, and can arguably be used as an auxiliary screening tool for colon cancer. We report several results using...

Tecnologias aplicadas em sanidade de peixes

Concentração inibitória mínima de oxitetraciclina para isolados de Aeromonas Hy...

Objetivou-se com este trabalho determinar a concentração inibitória mínima (MIC) de oxitetraciclina para isolados de Aeromonas hydrophila obtidos de pescado, água de cultivo de peixes e casos de septicemia hemorrágica em peixes. Foi determinado MIC de 100 isolados de A. hydrophila, oriundos de 12 pisciculturas localizadas nos Estados de Minas Gerais, Rio de Janeiro e Rio Grande do Sul, utilizando a técnica de m...

A Generalized Piezoelectric Bernoulli–Navier Anisotropic Rod Model

Abstract We apply the asymptotic analysis procedure to the three-dimensional static equations of piezoelectricity, for a linear nonhomogeneous anisotropic thin rod. We prove the weak convergence of the rod mechanical displacement vectors and the rod electric potentials, when the diameter of the rod cross-section tends to zero. This weak limit is the solution of a new piezoelectric anisotropic nonhomogeneous ro...

Actividades realizadas pelo CCPA no decorrer da XII Expedição Científica do Dep...

XII Expedição Científica do Departamento de Biologia - Pico 2005. ; O Centro de Conservação e Protecção do Ambiente (CCPA) do Departamento de Biologia (DB) promove acções de Educação Ambiental junto das populações. Neste âmbito, a nossa deslocação à ilha do Pico teve como principal objectivo realizar acções de sensibilização e promoção da melhoria do estado de conservação do meio ambiente. As nossas acções tiv...

A piezoelectric anisotropic plate model

We mathematically justify a reduced piezoelectric plate model. This is achieved considering the three-dimensional static equations of piezoelectricity, for a nonhomogeneous anisotropic thin plate, and using the asymptotic analysis to compute the limit of the displacement vector and electric potential, as the thickness of the plate approaches zero. We prove that the three-dimensional displacement vector converge...

Conical differentiability for bone remodeling contact rod models

We prove the conical di erentiability of the solution to a bone remodeling contact rod model, for given data (applied loads and rigid obstacle), with respect to small perturbations of the cross section of the rod. The proof is based on the special structure of the model, composed of a variational inequality coupled with an ordinary di erential equation with respect to time. This structure enables the veri catio...