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Slagging and fouling during coal and biomass cofiring: chemical equilibrium mod...

A thermodynamic model was applied to foresee the occurrence of fouling, slagging, and bed agglomeration phenomena during fluidized bed monocombustion of three different types of biomass, namely straw pellets, olive cake, and wood pellets. The cocombustion effect in reducing the occurrence of deposits and agglomerates of blends of 5, 15, and 25% (wt.) biomass with coal was also assessed. Chemical fractionation w...

Chryseobocterium indologenes adhesion and biofilm formation onto biomaterials

Antimicrobial efficacy of naturals compounds in combination with rifampicin aga...

Distribution of 3G signals over fiber

In this work we study the feasibility of UMTS (3G) transmission over Passive Optical Networks (P.O.N.). In order to achieve such objective, it was developed a simulator, so that we could correctly model the system and conclude about its impairments. The simulation results obtained validate this kind of transmission and highlight the associated limitations. ; Neste trabalho é estudada a viabilidade da tr...

Caracterização da dispersão numa rede óptica em operação

In this work the dispersion characteristics of random spans in a installed private fiber-optic network are discussed, and some field testing measurements techniques are evaluated. ; Neste trabalho discute-se a caracterização da dispersão numa rede óptica em operação e avalia-se a técnica de campo mais usada na medição da dispersão (desvio de...

All-optical routing with MZI-SOAs Switches

A router implementation based on OCDMA header recognition and MZI-SOA switching, allowing ps range packet switching capabilities is presented in this paper. Architecture results are presented. ; A router implementation based on OCDMA header recognition and MZI-SOA switching, allowing ps range packet switching capabilities is presented in this paper. Architecture results are presented.

Vestida de vermelho – um caso de reação medicamentosa

RESUMO Introdução: As reações de hipersensibilidade a fármacos podem limitar-se a um exantema cutâneo não específico, ou manifestar-se por um síndrome multissistémico, com prognóstico muito variável, como é o caso do síndrome DRESS (Drug Reaction with Eosinophilia and Systemic Symptoms). Caso clínico: Os autores apresentam o caso clínico de uma menina admitida no Serviço de Urgência por um síndrome febril pr...

Food contact surfaces coated with nitrogen-doped titanium dioxide : effect on L...

Improvement of food safety is a very important issue, and is on the basis of production and application of new/modified food contact surfaces. Titanium dioxide (TiO2) and, more recently, nitrogen-doped titanium dioxide (N-TiO2) coatings are among the possible forms to enhance food contact surfaces performance in terms of higher hygiene and easier sanitation. In this context, the present work aimed at evaluating...

An investigation of the potential application of chitosan/aloe-based membranes ...

A significant number of therapeutics derived from natural polymers and plants have been developed to replace or to be used in conjunction with existing dressing products. The use of the therapeutic properties of aloe vera could be very useful in the creation of active wound dressing materials. The present work was undertaken to examine issues concerning structural features, topography, enzymatic degradation beh...

N-acetylcysteine and vancomycin alone and in combination against staphylococci ...

Introduction: The ability of staphylococci to produce biofilm is an important virulence mechanism that allows bacteria both to adhere and to live on artificial surfaces and to resist to the host immune factors and antibiotics. Staphylococcal infections have become increasingly difficult to treat due their antibiotic resistance. Therefore, there is a continuous need for new and effective treatment alternatives a...