00:01
Firstly, let's summarize this problem.
00:04
We have a fermentation jar and the task is to find the number of viable cells by performing serial dilutions.
00:15
So we have six test tubes.
00:18
First, second, third, fourth, fifth and sixth.
00:32
And we add 100 microliters to 900 microliters of diluent.
00:41
This means 10 whole dilution.
00:44
So we can conclude that here will be 10 to power minus 1 dilution, 10 to power minus 2, 10 to power minus 3, 10 to power minus 4, 10 to power minus 5 and 10 to power minus 6 dilution of initial bacterial suspension.
01:11
As a result we should choose this plate because number of colony forming units is between 30 and 300.
01:24
And now let's calculate the number of colony forming forming units in the fifth test tube.
01:39
So this test tube...