Thus the frequency responses of plant tissues impedance can provide their physiological properties which could be potentially used for noninvasive tissue characterization. The noninvasive
studies of the biological health of the boiled tissues are found important either in food technology or in the medical
science for studying the burnt tissue properties of a burnt patient during treatment. The tissue health in boiled or
partially boiled tissues can be assessed by biological and biochemical studies but most the methods are in vitro
processes and invasive or destructive in nature. Therefore, a noninvasive, fast and low cost method is found
important to study the tissue health under boiling condition which can also be used in studying the burnt tissue
health in the treatment of burnt patients in hospitals and clinics. In this direction, EIS is studies on the inner cortex
of the banana stem tissues in un-boiled and boiled conditions and the frequency responses of the complex bioimpedance
are studied. Complex bioelectrical impedance (Z) and its phase angle (θ) of the banana stem tissue are
measured at different frequencies using an impedance analyzer (Fig. 2b) before and after boiling and the variations
of Z and θ are studied. The variations of the real part of impedance (RZ), imaginary part of impedance (XZ) are
calculated from the Z and θ (Fig. 2c). Nyquist plots and the frequency responses of other impedance parameters are
studied and the variation of bioimpedance in boiled tissue is analyzed.
2.4. EIS