METHODS Adrenaline was incubated with liver slices in defibrinated cat blood at 37.50 C. The adrenaline con-centration was determined at various times by assaying the mixture on the blood pressure of spinal cats. Bain et al.(1937) used, as a measure of the rate of adrenaline inactivation, the time taken to inactivate half of the original amount present; Bain and Batty (1952, 1956) took the regression coefficient of log adrenaline concentration ...
