Catalysers
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Evaluation of different on tooth bleaching : in vitro study / Avaliação de diferentes catalisadoores no clareamento dental : estudo in vitro
The aim of this in vitro study was to evaluate the bleaching efficacy of high concentration bleaching agents activated by chemical or physical catalysts. For this, this study was divided in two parts: Experiment 1- evaluated the efficacy of tooth whitening after treatment with 35 % hydrogen peroxide (Whiteness HP Maxx) activated by different light-curing uni
Publicado em: 2008
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2. SÃntese, caracterizaÃÃo e aplicaÃÃo de catalisadores heterogÃneos para a produÃÃo de biocombustÃveis / Synthesis,characterization and applications of heterogeneos catalysers for the biodiesel productions
Biodiesel is industrially produced by homogeneous transesterification of vegetable oils in the presence of basic species. However, removal of the base after reaction is a major problem, since purification of the ester phase is needed. In this study, different heterogeneous catalysts, based on calcium oxide (4-20%) supported on mesoporous SBA- 15 silica, and
Publicado em: 2008
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3. Indução de danos Oxidativos em celulas de mamifero por isoproterenol e cobre
Isoproterenol (IP) is a synthetic catecholamine of great pharmacological interest, as it is the most potent B-adrenergic known agonist. Recent works revealed the involvement of IP oxidation reactions in cardiotoxicity mechanisms. Copper is an essential microelement which has a fundamental role in living organisms metabolism. In high concentration copper is e
Publicado em: 2001
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4. Mortality of a cohort in a polyamide-polyester factory in Lyon: a further follow up.
In 1981-2 a retrospective study was undertaken in a polyamide-polyester factory in Lyon, France, to evaluate the effect of exposure to phthalates, nickel catalysers, and other chemicals in the work environment. The present paper reports the results of the follow up of this cohort up to July 1986. A slightly increased risk of cancers, in particular of the lun