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Science · Biology
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Draw picture that dilution would be easy to ubderstand
2. You are given a sample of hamburger and asked to determine the number of bacteria present. You weigh out 1.00 gm of hamburger and suspend it in 99.0 of sterile water. After thorough mixing, you transfer mL to a 9.0-mL sterile water blank. From this, you transfer 0.01 mL to a 99 L From this last tube, you plate out o 10 mL in duplicate onto Nutrient Agar. After incubation,there are A8 colonies on one plate and 62 colonies on the other plate. What is the total dilution in the last tube? What is the plate dilution? How many bacteria per gram were present in the hamburger?
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