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Exposure to industrial wideband noise increases connective tissue in the rat li...
Maria João R. Oliveira; Diamantino Freitas; António P. O. Carvalho; Laura Guimarães; Ana Pinto; Artur P. ÁguasRats were daily exposed (eight hours/day) for a period of four weeks to the same high-intensity wideband noise that was recorded before in a large textile plant. Histologic observation of liver sections of the rats was used to perform quantitative comparison of hepatic connective tissue (dyed by Masson trichromic staining) between the noise-exposed and control animals. For that, we have photographed at random c...
Arrest in ciliated cell expansion on the bronchial lining of adult rats caused ...
Maria João R. Oliveira; António S. Pereira; Paula G. Ferreira; Laura Guimarães; Diamantino Freitas; António P.O. Carvalho; Nuno R. GrandeWorkers chronically exposed to high-intensity/low-frequency noise at textile plants show increased frequency of respiratory infections. This phenomenon prompted the herein investigation on the cytology of the bronchial epithelium of Wistar rats submitted to textile noise. Workplace noise from a cotton-mill room of a textile factory was recorded and reproduced in a sound-insulated animal room. The Wistar rats we...
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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