CALCULATION OF HEAT INACTIVATION PARAMETERS $(1-$D value$)$

PROBLEM $2($HOMEWORK$-1)$

The remaining activities of peroxidase $($POD$)$ enzyme, determined after various heating times at $70,75$ and $80C$ at pH $7\mathrm{.}0$ phosphate buffer were given below. Calculate the D values and $z$ value of the enzyme.Solve the graph at semi$-$log paper.

$\backslash$table$[[$Time $($min$),$Residual activities $(\%)],[{70}_C{?}_{?},{75}_C{?}_{?},],[0,100,100,100],[1,90,70,54],[3,75,50,5\mathrm{.}3],[5,58,30,1\mathrm{.}7],[7,47,18,],[9,37,7\mathrm{.}9,],[11,29,4\mathrm{.}6,],[13,24,3\mathrm{.}2,],[15,19,-,-],[17,16,-,-],[20,13,-,-]]$