[Effect of ascorbic acid concentration on the ESR signal intensity of dry tissue].

A high concentration (r greater than 0.9; p less than 0.001) between the intensity of free radical ESR-signal (delta H max = 8-10 oe, g-factor 2.0057) in dry tissues of various organs of quinea pigs and concentration of free ascorbic acid in the same tissues was detected. Additional administration of ascorbic acid did not affect the correlation value of organs. The correlation coefficient was low in blood of control animals (r = 0.27; p greater than 0.05) and increased after administration of ascorbic acid (r = 0.95; p less than 0.001).