Effect of endogenous ascorbic acid oxidase activity and stability on vitamin C in carrots (Daucus carota subsp. sativus) during thermal treatment

2012 ◽  
Vol 134 (4) ◽  
pp. 2075-2085 ◽  
Author(s):  
Sze Ying Leong ◽  
Indrawati Oey
Keyword(s):  
Ascorbic Acid ◽  
Thermal Treatment ◽  
Vitamin C ◽  
Daucus Carota ◽  
Oxidase Activity ◽  
Acid Oxidase ◽  
Ascorbic Acid Oxidase

scholarly journals Metabolism of hydrogen peroxide in Euglena gracilis Z by L-ascorbic acid peroxidase

1980 ◽  
Vol 186 (1) ◽  
pp. 377-380 ◽  
Author(s):  
S Shigeoka ◽  
Y Nakano ◽  
S Kitaoka
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Electron Donor ◽  
Euglena Gracilis ◽  
Oxidase Activity ◽  
Acid Oxidase ◽  
Ascorbic Acid Oxidase ◽  
Reduction System ◽  
Oxidation Reduction ◽  
Euglena Gracilis Z

Euglena gracilis was found to contain a peroxidase that specifically require L-ascorbic acid as the natural electron donor in the cytosol. The presence of an oxidation-reduction system metabolizing L-ascorbic acid was demonstrated in Euglena cells. Oxidation of L-ascorbic acid by the peroxidase, and the absence of ascorbic acid oxidase activity, suggests that the system functions to remove H2O2 in E. gracilis, which lacks catalase.

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