3 documents found, page 1 of 1
The involuntary circular economy of (Nano) Plastics
Piçarra, Susana; Silva, H. F.; Araújo, L.; Coelho, J.; Oliveira, C.; Silva, N.; Matos, M.; Barreiros, A. M.
Spectroscopic detection of pigments in tissues: correlation with tissue aging a...
Oliveira, Luís M.; Goncalves, T. M.; Botelho, A. R.; Martins, I. S.; Silva, H. F.; Carneiro, I.; Carvalho, S.; Henrique, R.; Tuchin, V. V.The direct calculation of the absorption coefficient spectra of various tissues from spectral measurements allowed to retrieve the contents of melanin and lipofuscin. In the rabbit brain cortex, 1.8 times higher melanin content is explained by the neuron degeneration process. Similar melanin and lipofuscin contents were found in the rabbit pancreas as a result of the tissue aging process. The conversion of 83 %...
Evaluation of OCA diffusivity in tissues through diffuse reflection spectroscopy
Martins, Inês S.; Pinheiro, M. R.; Silva, H. F.; Tuchin, V. V.; Oliveira, Luís M.The evaluation of the diffusion properties of optical clearing agents in biological tissues, which are necessary to characterize the transparency mechanisms, has been traditionally made using ex vivo tissues. With the objective of performing such evaluation in vivo, this study was made to evaluate and compare those properties for propylene glycol in skeletal muscle, as obtained with the collimated transmittance...