MBIO 3812 Ex 6-4 Closed-System Growth

MBIO 3812 Ex 6-4 Closed-System Growth - MBIO 3812 Ex 6-4...

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9/26/11 11 MBIO 3812 Ex 6-4 Closed-System Growth bacteria replicate by binary fission 1 bacteria divides producing 2 bacteria, 2 bacteria divide producing 4 bacteria and so on …. 1 bacterium 16 32 2 4 8 64 bacteria 20 23 22 21 24 25 26
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9/26/11 22 MBIO 3812 Ex 6-4 Closed-System Growth Doubling / generation time = time taken to get from 2x to 2x+1 1 bacterium 16 32 2 4 8 64 bacteria 20 23 22 21 24 25 26
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9/26/11 33 MBIO 3812 Ex 6-4 Closed-System Growth It takes 500 Salmonella bacteria to cause disease in Salmonella has a doubling time of 20 minutes The chicken salad sandwich you took out of the refrigerator had 50 bacteria in it (not enough to make you sick) but you forgot the sandwich on the kitchen table. Two hours later you notice the sandwich on the counter and decide to eat it. Did you consume enough bacteria to make you sick?
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9/26/11 44 MBIO 3812 Ex 6-4 Closed-System Growth Nf = Ni(2n) Nf = # of cells at the final time point Ni = # of cells at the initial time point n = # of generations Salmonella example: Ni = 50 bacteria n = growth time ÷ doubling time [120 min ÷ 20 min] = 6 generations Nf = Ni(2n) Nf = 50(26) Nf = 3200 cells
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This note was uploaded on 09/26/2011 for the course MBIO 3812 taught by Professor Staff during the Fall '11 term at The University of Oklahoma.

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MBIO 3812 Ex 6-4 Closed-System Growth - MBIO 3812 Ex 6-4...

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