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mezya [45]
3 years ago
5

Why is the first breath of a newborn the most difficult ?

Biology
1 answer:
iogann1982 [59]3 years ago
3 0
The baby is used to getting what it needs through the placenta, which includes oxygen. The baby's lungs are initially filled with amniotic fluid.
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The decimal reduction time (DRT) to kill 90% of cell present for autoclaving a culture is 1.5 minutes. How long would it take to
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Answer:

10.5minutes

Explanation:

DRT = 90%

Cells present = 10^6

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Solution:

10^6(1.5)10^5(1.5)10^4(1.5)10^3(1.5)10^2(1.5)10^1(1.5)10^0(1.5)0=10.5

it would take it approximately 10.5 minutes to kill 10^6 of the cells.

If i should stop the heating process at 9 minutes this would have effect on some of the microbes as they are still present with 1 bacterium left which makes it not efficient.

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