2.6. TBARS and FRAP
The antioxidant capacity of the diets is shown in Table 2.At the beginning of the fattening period, 10 animals were randomlysampled for blood plasma. Ten animals of each treatment were sampledat the end of this period. The samples were centrifuged at 3500 rpm for10 min at 4◦C, plasma was deposited in cryostat tubes and stored in liquidnitrogen at −196◦C until analysis.The antioxidant capacity of the plasma was measured using theFRAP technique by Benzie and Strain (1996). The pattern curves weredone with different trolox (6-hydroxy-2-5-7-8-tetramethylchroman-2-carboxylic acid) concentrations, which is a water soluble equivalent ofvitamin E.TBARS (thiobarbituric acid reactive substances) analysis was doneaccording to the technique described by Ohkawa et al. (1979). The sam-ples were read in a Thermo Scientific UV-V15 spectrophotometer. Sampleanalyses were carried out twice. The results were interpreted as MDA,which is a by-product of lipid peroxidation.