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Optical absorption spectra of dispersion of pigmented particles are flattened due to pigment packaging (see Pigment packaging: Absorption spectra of dispersions). A similar effect exists for tissue that contains pigmented particles: red blood cells (Finlay and Foster 2004). Specifically, Finlay and Foster shown that an up to 65% reduction in the absorption peak in the Soret band of hemoglobin measured in tissue, i.e. with hemoglobin concentrated in red blood cells, can be well accounted for by the packaging effect. The diffuse reflectance spectrum of turbid medium, such as tissue, is related to the absorption spectrum of the medium. Thus, the packaging effect also contributes to the flattening of the diffuse reflectance spectrum.
| CITATION: Jonasz M. 2006. Pigment packaging: Absorption and diffuse reflectance spectra of tissue (www.tpdsci.com/Tpc/PgpTis.php). In: Top. Part. Disp. Sci. (www.tpdsci.com). |
HISTORY: Published: 17-Jan-2006 Modified: 03-Jul-2006 Peer-reviewed: PENDING |
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