Ricardo Almeida de Matos

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In this study, 5-aminolevulinic acid (ALA) gold nanoparticles (ALA:AuNPs) functionalized with polyethylene glycol (PEG) were synthesized and administered to rabbits to evaluate their use in clinical practice as theranostic agents for atherosclerosis. This was done by measuring the porphyrin fluorescence extracted from the rabbits' blood and feces. An(More)
A simple, environmentally friendly and cost-effective method was used to synthesize silver nanoparticles using tryptophan and light. To prepare the nanoparticles, the following components were used: deionized water, silver nitrate, light and tryptophan. The effects of the tryptophan concentration and light exposure time on the formation of tryptophan silver(More)
The records of 258 patients operated on for urethral strictures at Baragwanath Hospital over a 40-month period were reviewed. The young, economically active man was mostly affected and gonorrhoea appeared to be the most frequent aetiological cause. Internal urethrotomy was the commonest procedure performed (64% of cases). Overall, a single procedure was(More)
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