the effect of meat marinating with lactic and citric acid on some physicochemical and electrophoretic pattern of beef burger

background: meat products may be unacceptably tough because of the high connective tissue content of meats used in their manufacture. objective: the aim of this study was using meat acid marination method on some physicochemical and sensory characteristics of beef burgers. methods: meat was marinated in three concentrations (0.5%, 1% and 1.5%) of lactic and citric acid solutions (1:4 w/v) at 4 °c for 15h and was used in formulation of beef burgers. results: according to control sample, the highest redness (a*) value was found in the lowest concentration of lactic acid while the lowest a* value was in the highest concentration of citric acid. shear force value indicated that lactic acid had a tenderizing effect particularly at the lowest concentration and had a positive effect on overall acceptability. electrophoresis of proteins showed that band intensity had decreased in 0.5% acid treatments, compared to the control sample. conclusions: it seems that meat acid marination is an applicable technique to tenderize beef burgers with high percentage of meat.