The role of corporate social responsibility has assumed paramount importance recently due to the economic instability we are experiencing. The most recent economic and financial crisis that began at end 2007 in United States because of liquidity shortage and loss of reputation in the banking system has led companies to take a greater interest in issues related to Corporate Social Responsibility, this leads to i...
O papel da responsabilidade social das empresas tem assumido uma primordial importância nos últimos tempos devido à instabilidade económica que se vive. A mais recente crise económica e financeira, que teve o ponto de partida nos finais de 2007 nos Estados Unidos da América por causa da escassez de liquidez e perda de reputação no sistema bancário, tem levado à sociedade a exigir um maior interesse das empresas...
The ability of inulin, a prebiotic material, as encapsulation matrix was explored. Microcapsules of Raftiline were produced by spray drying inulin solutions at different solids content (5, 15 and 25%) at 120, 155 and 190 °C, according to a Central Composite Rotatable design. Produced capsules were analysed for morphology and size by SEM and physiochemical characterized by DSC, IR and RAMAN. Oregano essential oi...
The effect of encapsulating matrix on retention, protection and delivery of Oregano essential oil (EO) was studied. EO was encapsulated in rice starch porous spheres, inulin and gelatine/sucrose capsules by spray drying. Gelatine/sucrose matrix was also dried by freeze drying. Experimental designs were applied to test the effect of bonding agents and solids content for rice starch and drying temperature and sol...
As propriedades físicas das soluções de ácidos poliacrílicos são extremamente dependentes do grau de ionização dos polímeros. Quando a pH alto, este tipo de polímero pode formar géis transparentes, que são substituídos por soluções de baixa viscosidade e opacas a baixo pH. Pretende-se com este estudo um entendimento deste fenómeno, alargado também a derivados de ácidos poliacrílicos, bem como garantir a formaçã...
Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia ; The food industry by-products such as olive oil processing solid waste are an important source of natural bioactive compounds. The aim of the present work was to extract bioactive compounds from olive pomace using supercritical carbon dioxide extraction and to investigate the viability of their encapsulation in a food-stuff carrier as a way o...
Medicina Veterinária ; Veterinary Medicine
Estudos em animais de laboratório sugerem um efeito antiulcerogênico do extrato de Casearia sylvestris. Esse extrato ainda não foi estudado para a profilaxia e/ou o tratamento de úlceras gástricas em equinos. Para avaliar a influência do extrato de C. sylvestris na permeabilidade gástrica à sacarose, seis equinos adultos foram submetidos a modelo de indução de úlceras gástricas. Os animais foram submetidos ao t...
In this study, oregano essential oil (EO) was microencapsulated by spray/freeze drying in: rice starch (with/without bonding agents), gelatine/sucrose and inulin. Microencapsulates were analysed for morphology and structure, releasing ability of entrapped EO, as evaluated by diffusion coefficient (D) and bioactivity.
Mestrado em Matemática Financeira ; In the aftermath of the subprime crisis, the main purpose of this thesis is to as-sess the default dependency among firms, studying the case of four US financial institutions in two periods of time: before and during the crisis. The methodology followed is based on conditional copula models, which provides a set of global and tail dependency measures, beyond the linear corre...
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