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Control of bacterial cells growths by magnetic hyperthermia

In this work, we report the effectiveness of magnetic hyperthermia as a potential disinfection method against food spoilage microorganisms. High structural-magnetic quality magnetite nanoparticles have been found to be effective against bacterial microorganisms in solution under an oscillating magnetic field. Samples containing both magnetite nanoparticles and Pseudomonas fluorescens cells in aqueous solution h...

Effect of magnetic hyperthermia on the structure of biofilm and cellular viabil...

This work evaluated the effect of magnetic hyperthermia (MH) on planktonic cells and biofilms of a major food spoilage bacterium Pseudomonas fluorescens and its performance compared to a conventional direct heating (DH) technique. The results showed that MH had a greater and faster bactericidal effect, promoting a significant reduction in cell viability (≥3 Log CFU) in planktonic and biofilm cells, and leading ...

Effect of magnetic hyperthermia on Pseudomonas fluorescens planktonic cells and...

Characterization and evaluation of antifungal activity in vitro of Aloe vera fr...

Aloe vera leaves can be separated in a liquid fraction (exudate) and a mucilaginous pulp (gel). Recently, the antifungal activity of their components has been reported. The common technique for gel extraction from A. vera leaves are the traditional manual (in this case the liquid fraction is not separated) and a mechanical methods. Moreover, as a result of its processing the bagasse is obtained. The aim of this...

Palivizumab em contexto domiciliário

O Departamento de Pediatria, nomeadamente a UCIENP, através do Projeto de Apoio Domiciliário ao Recém-Nascido internado na UCIEN, formou em 2009, uma equipa multidisciplinar de apoio domiciliário, em parceria com a Fundação do Gil, procurando contribuir para a melhoria na qualidade de vida da criança e sua família. Um dos objetivos específicos deste projeto é a administração de terapêutica no domicílio e, nest...

Fasceíte necrotizante e síndrome de choque tóxico estreptocócico numa criança c...

Introdução: A fasceíte necrotizante é uma infecção grave dos tecidos moles, geralmente causada por Streptococcus pyogenes. É uma complicação rara da varicela e o diagnóstico numa fase precoce é pouco frequente. Caso clínico: Apresenta-se o caso clínico de uma criança de oito anos de idade com varicela, complicada de fasceíte necrotizante e síndrome de choque tóxico estreptocócico, que necessitou de procedimento...

Electrochemical oxidation of oxalic acid in the presence of halides at boron do...

Aim of this work is to discuss the electrochemical oxidation of oxalic acid (OA), analyzing the influence of NaCl and NaBr. Experiments were carried out at boron-doped diamond (BDD) electrodes, in alkaline media. BDD electrodes have a poor superficial adsorptivity so their great stability toward oxidation allows the reaction to take place with reactants and intermediates in a non-adsorbed state. The process is ...

Comparative study of human exposure to mercury in riverside communities in the ...

Four populations in the Amazon area were selected for a comparative study of mercury-exposed and non-exposed populations: São Luiz do Tapajós, Barreiras, Panacauera, and Pindobal Grande. The highest mercury levels in human hair samples were found in São Luiz do Tapajós and Barreiras, greatly exceeding the limits established by the World Health Organization. Panacauera showed an intermediate level below 9 µg/g. ...

Methylmercury intoxication activates nitric oxide synthase in chick retinal cel...

The visual system is a potential target for methylmercury (MeHg) intoxication. Nevertheless, there are few studies about the cellular mechanisms of toxicity induced by MeHg in retinal cells. Various reports have indicated a critical role for nitric oxide synthase (NOS) activation in modulating MeHg neurotoxicity in cerebellar and cortical regions. The aim of the present study is to describe the effects of MeHg ...

A technique using a membrane flow cell to determine average mass transfer coeff...

Measurement of mass transfer coefficients in biofilms ; Medição de coeficientes de transferência de massa em biofilmes