4 documents found, page 1 of 1
Replacing Harmful Flame Retardants with Biodegradable Starch-Based Materials in...
Carvalho, Bárbara O.; Gonçalves, Luís P.C.; Mendonça, Patrícia V.; Pereira, João P.; Serra, ArménioThe addition of toxic flame retardants to commercially available polymers is often required for safety reasons due to the high flammability of these materials. In this work, the preparation and incorporation of efficient biodegradable starch-based flame retardants into a low-density polyethylene (LDPE) matrix was investigated. Thermoplastic starch was first obtained by plasticizing starch with glycerol/water or...
Effect of elevated temperatures on the bond strength of FRP-strengthened bricks
Pereira, João P.; Maljaee, Hamid; Pereira, João Miguel; Guiassi, Bahman; Lourenço, Paulo B.Fiber Reinforced Polymer (FRP) composites have received extensive attention in the last years for Externally Bonded Reinforcement (EBR) of masonry structures. It is well known that the FRP-to-masonry bond behavior is a critical mechanism in this strengthening technique. Several experimental and numerical investigations have thus been devoted to investigation of the bond behavior. However, aspects such as long-t...
A user-centered interface for scheduling problem definition
Piairo, Jesus; Madureira, Ana Maria; Pereira, João P.; Pereira, IvoIn this paper we present a user-centered interface for a scheduling system. The purpose of this interface is to provide graphical and interactive ways of defining a scheduling problem. To create such user interface an evaluation-centered user interaction development method was adopted: the star life cycle. The created prototype comprises the Task Module and the Scheduling Problem Module. The first one allows us...
Infection with Mycobacterium ulcerans induces persistent inflammatory responses...
Oliveira, Martinha S.; Fraga, Alexandra G.; Torrado, Egídio; Castro, António G.; Pereira, João P.; Longatto Filho, Adhemar; Milanezi, FernandaBuruli ulcer (BU) is a devastating, necrotizing, tropical skin disease caused by infections with Mycobacterium ulcerans. In contrast to other mycobacterioses, BU has been associated with minimal or absent inflammation. However, here we show that in the mouse M. ulcerans induces persistent inflammatory responses with viru-lence- dependent patterns. Mycolactone-positive, cytotoxic strains are virulent for mice an...