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D-Xyloascorbic acid

XVII XVIII XIX XX D-Xyloascorbic acid (D-Ascorbic acid) ... [Pg.100]

The aerobic oxidation of ascorbic acid by plant extracts has been attributed in the past to both traces of copper acting nonspecifically and to a specific copper-protein enzyme. The specific enzyme is now well characterized. Its action differs from that of the cupric ion-catalyzed reaction in three significant ways. Hydrogen peroxide is not formed as a product of the enzymatic reaction, while it is with cupric ions. The copper in the enzyme is about 1000 times more effective per atom as a catalyst than free copper. The enzyme exhibits a marked substrate specificity. Thus, the enzyme oxidizes L-xyloascorbic acid much more rapidly than the D-form, while cupric ions oxidize both at similar rates (D17). [Pg.169]

Xyiitoi C D-Xylitol Xyliton. SeeXylitol 1-Xyloascorbic acid. See L-Ascorbic acid Xylocaine. See Lidocaine hydrochloride a-L-Xylo-2-hexulofuranosonic acid. See Dikegulac sodium... [Pg.4731]

Y Wang, Y Tominaga. Low-frequency Raman scattering of aqueous solutions of L-xyloascorbic acid and D-araboascorbic acid. J Chem Phys 104 4, 1996. Reproduced with permission from the American Institute of Physics.]... [Pg.620]


See other pages where D-Xyloascorbic acid is mentioned: [Pg.12]    [Pg.100]    [Pg.12]    [Pg.83]    [Pg.86]    [Pg.12]    [Pg.100]    [Pg.12]    [Pg.83]    [Pg.86]    [Pg.125]    [Pg.127]    [Pg.164]   
See also in sourсe #XX -- [ Pg.127 ]




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