Thermal and hydrolytic degradation of electrospun fish gelatin membranes

The thermal and hydrolytic degradation of electrospun gelatin membranes cross-linked with glutaraldehyde in vapor phase has been studied. In vitro degradation of gelatin membranes was evaluated in phosphate buffer saline solution at 37 ºC. After 15 days under these conditions, a weight loss of 68 % was observed, attributed to solvation and depolymerization of the main polymeric chains. Thermal degradation kinetics of the gelatin raw material and as-spun electrospun membranes showed that the electrospinning processing conditions do not influence polymer degradation. However, for cross-linked samples a decrease in the activation energy was observed, associated with the effect of glutaraldehyde cross-linking reaction in the inter- and intra-molecular hydrogen bonds of the protein. It is also shown that the electrospinning process does not affect the formation of the helical structure of gelatin chains.

Design de Ações Culturais Participativas: um Caso de Estudo no Centro Histórico da Cidade do Porto

In this paper we present the methodologies and preliminary conclusions of the first phase of the work of construction of audiovisual narratives related to the project “Manobras no Porto”, which will serve as a case study for the main research project entitled: “The Museum of All: Institutional Communication Practices in a Participatory Networked World”. The main objective of this research project is to understand how the use of collective and participatory creation of identities and narratives can contribute to get audiences engaged with cultural institutions and events. We intend to identify the effects and measure the dynamics of participation of audiences in the construction of audiovisual objects, and understand how these may influence the reconfiguration of the missions of the institutions and cultural projects, in the development of societies.

Financial and economic analysis of prevention of needlesticks in the hospital sector

This paper discusses the financial and economic analysis of prevention of needlestick accidents related to Occupational Health and Safety projects and presents the application to a case study involving a Hospital.