Figure 5. The efflux rate of thiobarbituric acid reactive substances (TBARS) for the three groups of rat liver preparations described in Figure 2. Levels of TBARS (an indicator of lipid peroxidation and therefore oxidative stress) were measured from the perfusate at the beginning and the end of preischemia, at the beginning and the end of reperfusion, and every 30 min during reperfusion. Plotted values are group averages +/− SEM. P < 0.05 *for within-group changes;[dagger] significant between mild hypothermia and reperfusion hypothermia;+significant with respect to preischemia.