Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Textbook Question
Chapter 8.2, Problem 1MI
MICRO INQUIRY Examine graph (a). How long would it take to kill one-half of the original population of microorganisms? Keep in mind that the Y axis is exponential.
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Q1) The ability of microbes to multiply or increase their population size is extremely important in microbial control, infectious disease and biotechnology.
a) List 4 concepts of microbial survival that would be beneficial in food preservation.
b) Explain any 3 of the microbial survival concepts as answered in Q1 (a). Give an example to each of the concept to support your answer.
BAX vs VIDAS: Two automated methods for detection of pathogenic microbes
How are these methods similar?
Are there advantages to one vs the other?
Describe the technology behind each system.
Recall that while FOVS will change with changing objectives, the size of the organism itself does
not change. Consider the next example.
Example #1
Polyp
Objective: 40x
Example #2
Polyp
blObjective: 10x
Example #3
Polyp
Objective: 4x
Field of view: 500 µm
Field of view: 2000 µm
Field of view: 5000 µm
Estimated # of
Estimated # of
Estimated # of
organisms that fit
organisms that fit
organisms that fit
across the FOV: 1
Approximate size of
organism:
500μm/ 1 = 500 μm
across the FOV: 4
across the FOV: 10
Approximate size of
organism:
2000µm/ 4 = 500 µm
Approximate size of
organism:
5000μm/ 10-500 μm
%3D
The three examples above are of the same jellyfish polyp, but at varying objectives.
What is the size of the polyp at the 40x objective?
10x?
4x?
Which objective visualizes the polyp best?
Which objective would be best used to estimate organism size with?
Chapter 8 Solutions
Prescott's Microbiology
Ch. 8.1 - MICRO INQUIRY Which types of agents can be used...Ch. 8.1 - Retrieve, Infer, Apply 1. Define the following...Ch. 8.1 - Retrieve, Infer, Apply 2. What is the difference...Ch. 8.2 - MICRO INQUIRY Examine graph (a). How long would it...Ch. 8.3 - MICRO INQUIRY How might one verify that filtration...Ch. 8.3 - Retrieve, Infer, Apply 1. What are depth filters...Ch. 8.3 - Retrieve, Infer, Apply 2. Describe the operation...Ch. 8.4 - Retrieve, Infer, Apply 1. Describe how an...Ch. 8.4 - Retrieve, Infer, Apply 2. In the past, spoiled...Ch. 8.4 - Prob. 3CC
Ch. 8.4 - Retrieve, Infer, Apply 2. What is the correlation...Ch. 8.5 - MICRO INQUIRY Why is it important that all of...Ch. 8.5 - MICRO INQUIRY Why are cross-linking agents such as...Ch. 8.5 - Retrieve, Infer, Apply 1. Why are most...Ch. 8.5 - Retrieve, Infer, Apply Construct a table that...Ch. 8.5 - Retrieve, Infer, Apply 3. Which disinfectants or...Ch. 8.5 - Retrieve, Infer, Apply 4. How do phenolic agents...Ch. 8.5 - Retrieve, Infer, Apply 5. Which physical or...Ch. 8.6 - Retrieve, Infer, Apply 1. Briefly explain how the...Ch. 8.6 - Retrieve, Infer, Apply How does being in a biofilm...Ch. 8.6 - Retrieve, Infer, Apply Suppose hospital custodians...Ch. 8.6 - Retrieve, Infer, Apply Briefly describe the phenol...Ch. 8.6 - Retrieve, Infer, Apply Why might it be necessary...Ch. 8.7 - Retrieve, Infer, Apply How would you explain to a...Ch. 8.7 - Retrieve, Infer, Apply Propose the use of specific...Ch. 8 - Prob. 1RCCh. 8 - Throughout history, spices have been used as...Ch. 8 - Design an experiment to determine whether an...Ch. 8 - Suppose you tested the effectiveness of...Ch. 8 - Prob. 4AL
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