Fig. 2. The averages of times which the 5samples took to reach at 121 °C.
result was consistent with previous studies. Marra, Zell, Lyng, Morgan,
and Cronin (2009) reported that in ohmic heating mashed potato
each of the same positions showed similar results.
In retort heating, temperature is measured at the cold point in food
(region with the slowest temperature increases rate). In this study, it
was assumed that the ohmically heated samples would be stored
under the same conditions as the retort-heated samples; therefore,
temperature measurement at the cold point was essential. In this
study, we selected D as the temperature measurement point for
ohmic heating because it is the farthest fromthe cell center and releases
the most heat. In the following sections, temperature measurements
were made at D, unless specified otherwise.
3.2. Electrical conductivity
In Fig. 4, data are plottedwith the cold point temperature on the x-axis
and the electrical conductivity, estimated fromcurrent and voltage values,