Skip to main content

News about Scitation

In December 2016 Scitation will launch with a new design, enhanced navigation and a much improved user experience.

To ensure a smooth transition, from today, we are temporarily stopping new account registration and single article purchases. If you already have an account you can continue to use the site as normal.

For help or more information please visit our FAQs.

banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
1.J. B. Nofsinger, T. Ye, and J. D. Simon, J. Phys. Chem. B 105, 2864 (2001).
2.S. Ito and K. Fujita, Anal. Biochem. 144, 527 (1985).
3.K. Wakamatsu and S. Ito, Pigment Cell Res. 15, 174 (2002).
4.J. Cheng, S. C. Moss, and M. Eisner, Pigment Cell Res. 7, 263 (1994);
4.G. W. Zajac, J. M. Gallas, J. Cheng, M. Eisner, S. C. Moss, and A. E. Alvaradoswaisgood, Biochim. Biophys. Acta 1199, 271 (1994).
5.Y. Liu and J. D. Simon, Pigment Cell Res. 16, 606 (2003).
6.A. Pullman and B. Pullman, Biochim. Biophys. Acta 54, 384 (1961).
7.M. L. Tran, B. J. Powell, and P. Meredith, Biophys. J. 90, 743 (2006).
8.G. Zonios, A. Dimou, I. Bassukas, D. Galaris, A. Tsolakidis, and E. Kaxiras, J. Biomed. Opt. 13, 014017 (2008).
9.J. McGinness, P. Corry, and P. Proctor, Science 183, 853 (1974).
10.T. Ye and J. D. Simon, J. Phys. Chem. B 107, 11240 (2003).
11.A. Orstan and J. B. A. Ross, J. Phys. Chem. 91, 2739 (1987);
11.A. Napolitano, P. Di Donato, G. Prota, and E. J. Land, Free Radic Biol. Med. 27, 521 (1999).
12.D. Fu, T. E. Matthews, I. R. Piletic, and W. S. Warren, J. Biomed. Opt. 13, 0405031 (2008);
12.D. Fu, T. Ye, T. E. Matthews, J. Grichnik, L. Hong, J. D. Simon, and W. S. Warren, J. Biomed. Opt. 13, 054036 (2008).
13.See EPAPS supplementary material at for a description of the laser apparatus and sample preparation.[Supplementary Material]
14.Y. Liu, L. Hong, K. Wakamatsu, S. Ito, B. Adhyaru, C. Y. Cheng, C. R. Bowers, and J. D. Simon, Photochem. Photobiol. 81, 135 (2005).
15.S. Ito, Pigment Cell Res. 2, 53 (1989).
16.J. B. Nofsinger, S. E. Forest, and J. D. Simon, J. Phys. Chem. B 103, 11428 (1999).
17.P. Meredith, B. J. Powell, J. Riesz, S. P. Nighswander-Rempel, M. R. Pederson, and E. G. Moore, Soft Matter 2, 37 (2006).
18.G. J. Blanchard and M. J. Wirth, Anal. Chem. 58, 532 (1986).
19.S. Ito and K. Wakamatsu, Pigment Cell Res. 16, 523 (2003).
20.A. Napolitano, M. De Lucia, L. Panzella, and M. d’Ischia, Photochem. Photobiol. 84, 593 (2008).
21.E. Kaxiras, A. Tsolakidis, G. Zonios, and S. Meng, Phys. Rev. Lett. 97, 218102 (2006);
21.S. Meng and E. Kaxiras, Biophys. J. 94, 2095 (2008).
22.R. Philip, A. Penzkofer, W. Baumler, R. M. Szeimies, and C. Abels, J. Photochem. Photobiol., A 96, 137 (1996).
23.M. Albota, D. Beljonne, J. L. Bredas, J. E. Ehrlich, J. Y. Fu, A. A. Heikal, S. E. Hess, T. Kogej, M. D. Levin, S. R. Marder, D. McCord-Maughon, J. W. Perry, H. Rockel, M. Rumi, C. Subramaniam, W. W. Webb, X. L. Wu, and C. Xu, Science 281, 1653 (1998).
24.T. Ye, L. Hong, J. Garguilo, A. Pawlak, G. S. Edwards, R. J. Nemanich, T. Sarna, and J. D. Simon, Photochem. Photobiol. 82, 733 (2006).
25.J. Riesz, J. Gilmore, and P. Meredith, Biophys. J. 90, 4137 (2006).
26.Y. Liu and J. D. Simon, Pigment Cell Res. 18, 42 (2005).
27.E. Vedralova and J. Duchon, Neoplasma 30, 317 (1983).

Data & Media loading...


Article metrics loading...



Fundamental optical and structuralproperties of melanins are not well understood due to their poor solubility characteristics and the chemical disorder present during biomolecular synthesis. We apply nonlinear transient absorption spectroscopy to quantify molar absorptivities for eumelanin and pheomelanin and thereby get an estimate for their average pigment sizes. We determine that pheomelanin exhibits a larger molar absorptivity at near IR wavelengths , which may be extended to shorter wavelengths. Using the molar absorptivities, we estimate that melanin pigments contain and 28 monomer units for eumelanin and pheomelanin, respectively. This is considerably larger than the oligomeric species that have been recently proposed to account for the absorptionspectrum of eumelanin and illustrates that larger pigments comprise a significant fraction of the pigment distribution.


Full text loading...


Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd