Control and
AA-containing samples increased (pb0.05) from 0.2 to 0.6 mg MDA/
kg sample during the first month of storage. TBARS of these samples
continued to increase during the remainder of the storage period.
Cooking is known to initiate oxidation so this was not unexpected.
GSE at the lower concentrations (100 and 300 ppm) protected these
samples against oxidation as well as or better than propyl gallate.
Sasse et al. (2009) reported similar results with pre-cooked, frozen,
stored ground pork patties. Rojas and Brewer (2008) reported that, in
raw, frozen vacuum-packaged beef, 0.02% GSE reduced TBARS by
about 12% compared to the control. Rojas and Brewer (2007) reported that, after 6 d of refrigerated storage, cooked beef samples TBARS
values in samples containing 0.01% or 0.02% GSE were 29.5% and 36.5%
lower, respectively, than TBARS of controls. Sasse et al. (2009) found
that, in precooked pork patties, based upon TBARS values, GSE and PG
exhibited the greatest antioxidant activity over the storage period.