Question

the del factor (δ) for the reduction of number of microbial cells from 1010 to one is a. 1 b. 10 c. 23 d. 103

Answer 1

Del factor is defined as an estimate of relative reduction in the number of living cells with respect to their initial number.

Del factor can be calculated using the formula:

$del factor= ln\frac{A_{0} }{A_{t} }$

$A_{0}=$Initial number of microbial cells=$10^{10} cells$

$A_{t}$Number of cells after time t =1cell

Plugging in the values to calculate del factor:

$del factor=ln\frac{10^{10} }{1}$

                     = 23

Therefore, the correct answer is c.23

Answer 2

The del factor (δ) for the reduction of number of microbial cells from 1010 to one is a. 1 b. 10 c. 23 d. 103

Answer. C. 23

What is actually del factor?

Deindoerfer and Humphery used the term ln (Nt / N0) as a basic design criterion for the sterilization which has been called as DEL Factor or NABLA factor. Del factor is a measure of fractional reduction of viable organism count produced by a certain heat and time regime.