# Bacterial growth watch

1. Hi,

I'm currently using the exponential growth rate constant to calculate the generation time of bacteria in a population. However, for growth that isn't exponential I'm getting answers of less than 1, and this isn't very useful if I'm trying to work out the the generation time. Is there anything I can use to calculate generation time if growth isn't exponential?
2. Look up 'Doubling time'
3. (Original post by Turkishee)
Look up 'Doubling time'
It's the same thing as generation time.
4. (Original post by Retrodiction)
Hi,

I'm currently using the exponential growth rate constant to calculate the generation time of bacteria in a population. However, for growth that isn't exponential I'm getting answers of less than 1, and this isn't very useful if I'm trying to work out the the generation time. Is there anything I can use to calculate generation time if growth isn't exponential?
I thought you should always get exponential growth at some point in bacterial growth... Maybe I'm wrong..
5. The formula that you can use is:

Nt = N0 x 2^(t/td)

Where Nt = number of cells after 't' hours
N0 = original cell number in population
t= time in hours
td = doubling time
also t/td is the number of generations

But what are the numbers your using. Also if logs are taken this would convert this exonential to a linear graph, so check that iswell. But yh i would also assume that there should be an exponential growth of bacteria, as there growth is hardly ever stable and always changing, but check your numbers maybe you can figure a solution out.

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 2, 2011
Today on TSR

### Results day under a month away

How are you feeling?

### Best friend wants me to pick wedding dress

Poll
Useful resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE