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Electrochemical measurement of endogenously produced nitric oxide in brain slic...
Ferreira, Nuno R.; Ledo, Ana; Frade, João G.; Gerhardt, Greg A.; Laranjinha, João; Barbosa, Rui M.The role of nitric oxide (NO) as a regulatory diffusible molecule in the brain requires the evaluation of its concentration dynamics. In this work, we have developed microelectrodes suitable for real time electrochemical measurements of NO in vitro. Nafion and o-phenylenediamine were used to modify the surface of carbon fiber microelectrodes (8 [mu]m diameter; [approximate]100 [mu]m tip length). Coating with Na...
Reduction of Rat Pleural Microvilli Caused by Noise Pollution
Maria João R. Oliveira; António S. Pereira; Paula G. Ferreira; Nuno R. Grande; Artur P. Águas; Laura Guimarães; Diamantino Freitas; A CarvalhoScanning electron microscopy (SEM) was used to investigate whether chronic exposure to noise modifies pleural morphology. Rats were submitted to 8-h/day schedule of noise that is similar to the working hours at cotton-mill rooms. Morphometry of the area occupied by microvilli on the pleural surface showed a decrease in microvilli after 3 months of rat exposure to noise. The reduction of microvilli was 10% after...
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