| 光谱学与光谱分析 |
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| UV-Vis Spectroscopic Study of Aluminum-Manganese Cooperative Effect on the Melanin Formation from DOPA Oxidation |
| DI Jun-wei1, 2，BI Shu-ping1* |
1. Department of Chemistry, Nanjing University, Nanjing 210093，China
2. Department of Chemistry, Suzhou University, Suzhou 215006, China |
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Abstract The effect of aluminum and manganese ions on the melanin formation from oxidized DOPA was investigated by UV-Vis spectroscopy. In the weak acidic buffer solution (pH 5.5), aluminum and manganese ions have cooperative effect on the melanin formation. Aluminum is not a transition metal and therefore cannot initiate oxidative effect. However, manganese ions initiate the oxidation of DOPA to yield dopachrome. Aluminum ions can greatly catalyze the conversion reaction of dopachrome to form 5,6-dihydroxyindole，which is a key step in the biosynthesis of melanin. Its product is further oxidized and polymerized immediately to produce melanin. Therefore, the cooperative effect of manganese and aluminum ions increases the melanin formation from DOPA and enhances the oxidative stress.
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Received: 2003-05-06
Accepted: 2003-09-16
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Corresponding Authors:
BI Shu-ping
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| Cite this article: |
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DI Jun-wei,BI Shu-ping. UV-Vis Spectroscopic Study of Aluminum-Manganese Cooperative Effect on the Melanin Formation from DOPA Oxidation [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(01): 83-85.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2005/V25/I01/83 |
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