ABSTRACT
ABSTRACT: The aim of the investigation is to find the most suitable model that can be used to estimate the electric behavior of cell and biological tissue when measuring the aging of beef and to get results in agreement with physical analyses. For this purpose measurements were done in the frequency range from 40 Hz-10 MHz where two dispersion areas are denoted, dispersion α at low frequency and dispersion β at high frequency. According to literature, the α-dispersion serves in the study of cells membrane integrity during aging. The reliable model that can be used to estimate the electric behavior of cell and biological tissue is the modified Fricke model. This model describes the depressed semicircles and is more suitable to approximate the meat than the Fricke model. The model parameters show that the intercellular resistance increases by aging caused by the shrinkage of fibers and release of electrolytes from cells to the extracellular. Simultaneously this effect results besides cutting of muscle fibers by the enzymes in the decrease of extracellular resistance. This decrease is due also to the inert enzymes that will gradually cut the muscle. The decrease of capacitance in the two cases is due to oxidation of the phospholipids membrane layers that makes the membrane porous.
