Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

FoodMicroLecture 22

Final Exam

Describe thermobacteriology. Concerned with the relationship between bacteria and heat; studies efficacy of heat sterilization techniques; associated with low-acid canned foods/C. botulinum.
Thermobacteriology processes must render the food ____ and ____. safe, commercially stable
Describe microbial death. Failure of reproduction, absence of growth during opportunity.
T or F: Viable but non culturable cells are considered dead. True
Name three physiological factors which affect microbial inactivation. Growth medium, pH, temperature, competition, antimicrobials
Define thermal death time. Time necessary to inactivate a defined concentration of bacterial spores or vegetative cells at a specified temperature.
T or F: Thermal death time depends on curve shape. False
For first order destruction, the level of microbial concentration depends on the _____ of product. volume
What are the three assumptions made to use the survival curve? Even distribution of innoculum, linear response, isothermal temperature.
Define transformation. Used to get a linear response from a set of log values.
T or F: The thermal death time curve is linear with temperature. True
Define lethal rate. The equivalent time at a reference temperature needed to destroy the same number of microorganisms for the current product temperature.
Define F-value. The time in minutes needed to destroy a given number of organisms at a specific temperature.
Minimum health sterilizing values are based on a 12 log reduction of _____. C. botulinum
Commercial sterility values are based on a 5 log reduction of _____. C. sporogenes
Created by: goberoi
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards