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This study was carried out to determine the effects of olive oil prepared tomato powder (OPTP) used as lycopene source on fresh pork patties. OPTP was not added (0%; C), or was added at 0.25% (T1), 0.5% (T2), 0.75% (T3) and 1.0% (T4) in a basic pork patty formula and patties were stored for 7 days at 5℃. pH values of T3 and T4 were lower (p0.05) than those of control until storage day 3. However, pH values of treated samples were dramatically increased (p0.05) after 7 d of storage. Cooking loss values of treatments were lower (p0.05) than those of control at day 1 of storage. Thiobarbituric acid reacting substances values were lower (p0.05) in all treatments than in untreated samples during storage. All treated samples had lower values (p0.05) for lightness (L*) but significantly higher values (p0.05) for redness (a*) and yellowness (b*) than the untreated samples during storage. Total plate counts of T4 were lower (p0.05) than others during storage. In sensory evaluation, the scores of color, aroma and overall acceptability in T3 and T4 scored higher (p0.05) than those of control at days 1 and 3 of storage, however, statistical significance was not found (p0.05) among the samples after 7 days of storage. In conclusion, tomato powder-treated groups were significantly higher in redness (a*) and yellowness (b*), and lipid oxidation was inhibited, as compared with control during storage. Therefore, as a natural additive, tomato powder could be used to extend the self-life of meat products, providing the consumer with food containing natural additives, which might be seen more healthful than those of synthetic origin.

Changes in Quality Characteristics of Fresh Pork Patties Added with Tomato Powder during Storage