Question from students again

I do not have the time to go back to that question. Your answer appeared to be correct. When you can provide specific and precise results, give these results. That is, give the answer of 10^-9995/ml.

Best,

HS Kwan

-----Original Message-----
From:dddddddddddddddddddddddddddd
Sent: Sunday, May 06, 2012 11:59 PM
To: hoishankwan@cuhk.edu.hk
Subject: Questions regarding FNSC 4180 exam

Dear Professor Kwan,

I would like to clarify my understanding in D values.  From the pastpaper

2007-2008 question 6d, I got the following answers

New D value for each bacteria at 120C

Spoilage bac.: 0.0025min

Bacterial spores: 0.25min

Fungal spores: 0.05min

Therefore, the cell densities would be

Spoilage bac.: decrease from 10^5 to 10^-9995/ml

Bacterial spores: decrease from 10^4 to 10^-96/ml

Fungal spores: decrease from 10 to 10^-49/ml

Are my answers correct? From your blog, I do realize sterilization greater than

12D is possible.  However, when it comes to the cell density, eg 10^-9995/ml,

shall I write  10^-9995/ml or simply 0?