| Autor: |
Nofsinger JB; Department of Chemistry, Duke University, Durham, NC 27708-0347, USA., Forest SE, Eibest LM, Gold KA, Simon JD |
| Jazyk: |
angličtina |
| Zdroj: |
Pigment cell research [Pigment Cell Res] 2000 Jun; Vol. 13 (3), pp. 179-84. |
| DOI: |
10.1034/j.1600-0749.2000.130310.x |
| Abstrakt: |
Scanning electron microscopy (SEM) is used to examine the structure of natural and synthetic melanins. Eumelanin from Sepia officinalis and synthetic eumelanin are found to be structurally dissimilar. The natural sample has a significant structural order with subunits that have a lateral dimension of approximately 15 nm. The synthetic samples, on the other hand, appear to be amorphous solids. These results lend support for the existence of fundamental structural units proposed from the analyses of wide-angle X-ray diffraction measurements and previous mass-spectrometry results. These findings also provide insight into the disparate photophysical behavior of Sepia and synthetic eumelanin. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
