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Ime + 949 me - 1000 1: 1000 ( A ) deletion - 1 19 999 ml . 19 Iml Time trat A R D 999 ml C E 999 and 949 ml 999 ml. dilution Means /10 6 7109 10 12 7...
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Question

5. Suppose that in the plate "D" from exercise #3 above you counted

293 colonies. What is the concentration of bacteria in the original sample? Show your rationale and make sure that the result is expressed in "two-significant figures". Do not forget of variables units as showing them in your rationale, such as "colonies" and "CFU/ml" or "CFU/g"

Petty-BIOL3410 Lab 6a Question 3.jpg
Ime
+ 949 me
- 1000
1: 1000
( A ) deletion - 1
19
999 ml .. .
19
Iml
Time
trat
A
R
D
999 ml
C
E
999 and
949 ml
999 ml.
dilution Means
/10 6
7109
10 12
7 10 15
I'ml +999 ml .
next tubes diluted 103 times
From previous
water
tube
( 103) 3
1
1015
And
2020

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