Subtopic: Kinetics of microbial death – pasteurization and sterilization of milk and other liquid foods
Question Statement:
Match the Thermal Processing Parameters in Group-I with their Definitions in Group-II:
$\begin{array}{|ll|ll|}\hline \textbf{Group-I (Parameter)} & & \textbf{Group-II (Definition)} & \\ \hline \text{P. } D\text{-value} & & \text{1. Temperature increase to reduce } D\text{-value by a factor of 10} \\ \text{Q. } z\text{-value} & & \text{2. Time at given temperature to destroy } 90\% \text{ of microbial population} \\ \text{R. } F_0\text{-value} & & \text{3. Equivalent heating time in minutes at } 121.1^\circ\text{C} \\ \hline \end{array}$
Select the CORRECT matching combination:
Options:
(A) P-2, Q-1, R-3
(B) P-1, Q-2, R-3
(C) P-3, Q-1, R-2
(D) P-2, Q-3, R-1
Answer Key:
A
Step-by-Step Solution & Explanation
Thermal Kinetics Definitions:
- **$D$-value**: Time for 1 log ($90\%$) reduction at constant temperature (2).
- **$z$-value**: Temperature change for 10-fold change in $D$-value (1).
- **$F_0$-value**: Equivalent sterilization time at $121.1^\circ\text{C}$ (3).
Correct match: **P-2, Q-1, R-3**.