Photooxidation of Tryptophan Leading to 2-Aminoacetophenone - A Possible Reason for the Untypical Aging Off-flavor in Wine

2014 ◽  
Vol 90 (6) ◽  
pp. 1257-1263 ◽  
Author(s):  
Nora Horlacher ◽  
Wolfgang Schwack
Keyword(s):  
Photooxidation Of Tryptophan

Photooxidation of tryptophan in the presence of riboflavin

1987 ◽  
Vol 35 (1) ◽  
pp. 71-76 ◽  
Author(s):  
James D. Kanner ◽  
Owen Fennema
Keyword(s):  
Photooxidation Of Tryptophan

Dual Roles of Dissolved Organic Matter as Sensitizer and Quencher in the Photooxidation of Tryptophan

2014 ◽  
Vol 48 (9) ◽  
pp. 4916-4924 ◽  
Author(s):  
Elisabeth M.-L. Janssen ◽  
Paul R. Erickson ◽  
Kristopher McNeill
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Dual Roles ◽  
Photooxidation Of Tryptophan

Photooxidation of Tryptophan: O2(Δg) versus Electron-Transfer Pathway

1997 ◽  
Vol 65 (1) ◽  
pp. 96-102 ◽  
Author(s):  
Jurina M. Wessels ◽  
Christopher S. Foote ◽  
William E. Ford ◽  
Michael A. J. Rodgers
Keyword(s):  
Electron Transfer ◽  
Electron Transfer Pathway ◽  
Photooxidation Of Tryptophan

Influence of Environment on the Photooxidation of Tryptophan with the Carcinogenic Hydrocarbon 3,4-Benzopyrene in Aqueous Solutions of Soap, Caffeine, and Urea

1973 ◽  
Vol 28 (7-8) ◽  
pp. 390-396 ◽  
Author(s):  
Günter Reske ◽  
Horst Bauer
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Sodium Dodecylsulfate ◽  
Quantum Yields ◽  
Solvation State ◽  
Solvent Dependence ◽  
Induced Dipole ◽  
Carcinogenic Hydrocarbon ◽  
The Difference ◽  
Photooxidation Of Tryptophan

Abstract The solvent dependence of the photooxidation of tryptophan and 3,4-benzopyrene in aqueous solutions was studied by quantum yield measurements. When the hydrocarbon is dissolved in aqueous solution of caffeine, the quantum yields indicate a 3,4-benzopyrene photosensitized trypto­ phan oxidation instead of a photocooxidation, which is indicated in aqueous solution of sodium dodecylsulfate. The same photosensitized oxidation as in caffeine solution is observed, when urea (6 ᴍ) is added to the soap solution, while the fluorescence and absorption spectra indicate no change in the solvation state of the hydrocarbon, comparable to the change from hydrophobic solubilization by the detergent to dipole - induced dipole complex solubilization by caffeine. It is concluded that the difference in the reaction pathways is caused by different solvation states of the excited or reacting oxygen. In the discussion of the results it is referred to reactions of inhibitors.

Characterization of a cell-lethal product from the photooxidation of tryptophan: hydrogen peroxide

Science ◽  
2003 ◽  
Vol 191 (4226) ◽  
pp. 468-469 ◽  
Author(s):  
J. McCormick ◽  
Fischer ◽  
J. Pachlatko ◽  
A Eisenstark
Keyword(s):  
Hydrogen Peroxide ◽  
A Cell ◽  
Photooxidation Of Tryptophan
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