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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 %...


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