期刊
PHOTOCHEMISTRY AND PHOTOBIOLOGY
卷 88, 期 6, 页码 1378-1384出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1751-1097.2012.01131.x
关键词
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资金
- Duke University
- Charles Bradsher Fellowship
- William Krigbaum Fellowship
Photoemission electron microscopy is used to measure the absorption coefficients, epsilon c, of intact iridal stroma melanosomes isolated from dark brown and blue-green human irides for the spectral range lambda = 244-310 nm. These iridal stroma melanosomes were chosen because different colored irides produce organelles of varying eumelanin:pheomelanin ratios with similar size and morphology. Similar absorption spectra are found for the two types of melanosomes. The experimental spectra measured within are compared with both the extinction coefficient spectra obtained on soluble synthetic model systems and the monomeric precursors to each pigment.
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