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. Author manuscript; available in PMC: 2007 Mar 21.
Published in final edited form as: Free Radic Biol Med. 2006 Nov 10;42(3):404–412. doi: 10.1016/j.freeradbiomed.2006.11.007

Figure 7.

Figure 7

Kinetics of the reduction of 1mM nitroxide 1 in deaerated 0.1 M Na-phosphate buffer, pH 7.6, 0.1 mM DTPA, in the presence of various concentrations of the dehydroascorbic acid, 5 mM (□) and 10 mM (■), measured by EPR as described in the Materials and Methods. Solid lines are the best fits of the experimental data to equations (4, 5) yielding the rate constant k4 = 7×10−4s−1 and k5 = (3.0±0.4)×10−3 M−1s−1.