Figure 1. Average values for chemiluminescence and vascular resistance for control preparations (i.e., isolated rat livers) perfused for 3 h at normothermia (38 [degree sign]C). All values are expressed as counts/s (+/− SEM) for 5-min intervals at the beginning and the end of perfusion and every 30 min during perfusion. Vascular resistance was calculated in mmHg [middle dot] ml-1[middle dot] min-1as the quotient of perfusion pressure and flow rate.