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now: Sat Jun 25 09:13:32 2022 ... mod: Sun Apr 4 18:50:31 2021
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For any exponentially growing culture, take a measurement of the number of cells at an initial time (Ni), and a second measurement at some later time (NL). If T is the length of time between the observations:

doubling time = T ⋅ ln(2) / ln(NL / Ni) measured in units of T.

at 4:00 pm on Monday, 3 x 105 cells are plated. At 3:00 pm the following Friday, 2.5 x 106 cells are counted.

The doubling time for this culture would be:

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