00:01
So this question asks you, what does the persistence of the stationary phase during growth of bacteria? so first of all, what is stationary phase? so when you have a bacteria growth, they are going through several stages.
00:11
First of all, it will go through what we call a lag phase.
00:15
So there's very little growth in the very beginning.
00:17
So the bacteria will have to get used to the environment first before they pick up on their exponential growth.
00:24
After the log phase is over, it usually takes about several hours, and it goes to this log phase.
00:33
This is exponential growth.
00:34
You can see it very steep going up.
00:37
Then after a while, it plateaued.
00:41
The fast growth period is over.
00:44
This is called the lag phase.
00:50
The middle part we call the log phase, exponential growth.
00:54
Growth and then when it plateau we call this stationary phase.
00:59
The stationary phase is a symbol that the rapid growth of bacteria is over and this is due to several reasons.
01:09
So the question asks you about how long or what does the persistence of stationary phase depend on.
01:15
So once the fast growing period is over this means that the nutrient is being used up.
01:29
So, as you can see, that stationary phase means that, first of all, the nutrient availability goes down...