Question

If $D_{10}$ for {Salmonella} in egg yolk is 0.75 kGy, calculate the radiation dose in kGy (rounded off to 2 decimal places) required for reducing the {Salmonella} count in egg yolk by 8 log cycles.

Hint:

Always multiply the $D_{10}$ value with the required log reduction to get the total dose.

Answer 1

Correct Answer: 13

Step 1: Recall the D-value concept.
- $D_{10}$ value is the radiation dose required to reduce microbial population by 1 log cycle (i.e., by 90%). - Therefore, total dose required for $n$ log reductions is: \[ \text{Total Dose} = D_{10} \times n \]
Step 2: Substitute values.
\[ D_{10} = 0.75 \, \text{kGy}, n = 8 \] \[ \text{Total Dose} = 0.75 \times 8 = 6.00 \, \text{kGy} \] Final Answer: \[ \boxed{6.00 \, \text{kGy}} \]