Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Fluorescence properties of natural eumelanin biopolymer
Ist Teil von
Journal of luminescence, 2011-08, Vol.131 (8), p.1584-1588
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2011
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Results about fluorescence spectroscopy of natural eumelanin are presented and compared to analogous results related to synthetic eumelanin, with the aim to investigate the structural organization of eumelanin and the role of the protein coat in its optical and structural properties. The spectra of synthetic and natural eumelanin have similar optical spectra, except for the features related to proteins in natural eumelanins. Fluorescence due to ensembles of large oligomer systems has been spectrally distinguished from that due to monomers and small oligomer systems. Nonetheless, the natural (protein-containing) eumelanin results to consist of aggregates having a larger size than that of synthetic eumelanin.
► Aggregates have larger size in natural than in synthetic eumelanin. ► Fluorescence of natural eumelanin is due both to large and small oligomer systems. ► The fluorescence spectra support the “chemical disorder model”.