Fig. 2. Effect of barbiturates on formation of malondialdehyde (MDA) and 4-hydroxynon-2-enal (HNE). Incubation of 312.5 μM FeCl 3 in Intralipid for 60 min produced 55 ± 15 μM HNE and 22 ± 5 μM MDA. Mean and SD from four to six samples are given. *P < 0.01 versus control.