Encontrados 3 documentos, a visualizar página 1 de 1
Release of volatile compounds from polymeric microcapsules mediated by photocat...
Marques, Juliana Filipa Gouveia; Oiveira, L. Filipa; Pinto, Renato; Coutinho, Paulo J. G.; Parpot, Pier; Gois, J. R.; Coelho, J. F. J.; Magalhães, F. D.In this study we propose a suitable method for the solar-activated controlled release of volatile compounds from polymeric microcapsules bonded with photocatalytic nanoparticles. These reservoirs can find applications, for example, in the controlled release of insecticides, repellents, or fragrances, amongst other substances. The surfaces of the microcapsules have been functionalized with TiO2 nanoparticles.Upo...
Photocatalytic thin films coupled with polymeric microcapsules for the controll...
Oliveira, L. Filipa; Marques, Juliana Filipa Gouveia; Coutinho, Paulo J. G.; Parpot, Pier; Tavares, C. J.This work reports on the application of solar-activated photocatalytic thin films that allow the controlled-release of volatile agents (e.g., insecticides, repellents) from the interior of adsorbed polymeric microcapsules. In order to standardize the tests,a quantification of the inherent controlled-release of a particular volatile agent is determined by gas chromatography coupled to mass spectroscopy, so that ...
Reducing antioxidant capacity evaluated by means of a controlled potential oxid...
Oliveira, Raquel; Marques, Juliana Filipa Gouveia; Bento, M. Fátima; Geraldo, M. Dulce; Bettencourt, A. P.An analytical method suitable for an antioxidant sensor is presented following the response of these substances to an extensive oxidative attack imposed by electrochemical means. The electrochemical assay simulates the action of a reactive oxygen species (ROS) by means of electrolyses carried out at a potential which is settled at the formal potential of the ROS. The antioxidant activities of trolox and ascorb...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||