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Introduction
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Sometimes you wish the answer would just jump out at you.
Sometimes you have to convince everybody else that different is better.
ENGINEERING ENGINEERING SUPPLEMENTATIONSUPPLEMENTATION
Bret BreitenkampVan Vleck ISDVan Vleck, TX
IntroductionIntroduction
TeacherTeacher Bret Breitenkamp Van Vleck ISD
Van Vleck High Science Department
Physics Principles of Technology Integrated Physics, and Chemistry
Grade Levels 9-12
Review of ResearchReview of Research
DosimetryDosimetry
MONITORING RADIATION MONITORING RADIATION EXPOSUREEXPOSURE
Internal & External
DosimetryMonte Carlo Calculations
Radiation used todayRadiation used today
IntroductionIntroduction
Radiation Radiation has been used in medicine. Such as….
Bones Teeth Body Tissue Unwanted masses
IntroductionIntroduction
Radiation Use of radiation for safety.
Airports School Borders
IntroductionIntroduction
Radiation Use of radiation in the food industry.
Radiation is used on our food? Yes, radiation is used on your food, and no
you will not glow at night. How is radiation used on the food
product? What is the radiation actually doing for
us?
Electron Beam Linear AcceleratorElectron Beam Linear Accelerator
Radiated FoodRadiated Food
The FDA has been radiating food for quite some time now. Since 1999 they have been radiating
foods that are imported. How can this help us?
This is where the students would need to complete some research about the applications of radiation in the food industry.
With in the research, I know that they would stumble on the pathogens being focused on with the radiation.
Listeria
Shigella
E.coliCampylobacter
MostMost important Pathogenic Bacteria in Food important Pathogenic Bacteria in Food
Salmonella
Irradiation also inactivates insect pests (particularly from fruits and vegetables).
Irradiated to protect American agriculture from foreign pests.
Shelf-lifeShelf-life extension of extension of StrawberriesStrawberries
Non-irradiated
After 7 days storage Electron beam irradiated
After 17 days storage
Pre-informationPre-information
Pre-testPre-test
Some of the questions could include but is not limited to:
Explain where pathogens come from and why are they so feared by the general population?
Disucss where and who do pathogens benefit? Describe any form of radiation that is beneficial
and how it is beneficial? How would you use radiation to help the
general population? If you had to choose where to use radiation, be
it medical, food commodities, or safety (airports, borders, schools) where would you use it and why?
Houston we have a problemHouston we have a problem
The ProblemThe Problem
How does the radiation affect the pathogens? Students would be required to contemplate
how the addition of energy in high amounts would decontaminate the food product.
If we were to participate in a lab how would you go about discovering the affects of radiation on pathogens?
Where can you get some of these pathogens?
The ProblemThe Problem
How would you grow these pathogens?
Given that we do not have the industrial radiation machine, how can we expose the pathogens to a radiation source?
In addition to the statement above, for how long would you expose the pathogens?
Pre-lab CheckPre-lab Check
What materials do we need?
How much do we need?
What are the Objectives of this lab?
How much time do we need?
The BIGGEST Question…The BIGGEST Question…
What safety precautions need to be taken during this study?
Lab implementationLab implementation
Stage 1Stage 1
The Students will streak agaros plates and then take the count after one day.
Day 1Day 1
Students will allow the plates to be exposed the radiation source for 24 hours.
Day 2Day 2
Students conduct a count after the first day of radiation.
Day 2Day 2
Students return the plates for another 24 hours.
Day 3Day 3
Colony Count
Stage 1 ConclusionStage 1 Conclusion
After the E. Coli has been exposed to the radiation, the students will take the data collected and figure how to formulate charts and/or graphs to show the degredation of the E. coli population.
Stage 2Stage 2
Mix indication solution
Radiation of a solution.
Day 1Day 1
Student will radiate the solution for 24 hours.
Day 2Day 2
Student will check the pH of the solution.
Day 2Day 2
Student will return the test tube for 24 more hours of radiation.
Day 3Day 3
Student will test the pH of the solution.
Stage 2 ConclusionStage 2 Conclusion
After the solution has been exposed to the radiation, the students will take the data collected and figure how to formulate charts and/or graphs to show the pH change of the solution.
Engineering Supplement Engineering Supplement ConclusionConclusion Collecting data
Completing a lab write-up
Present data discussing Successes Failures
SummarySummary
Stage 1 E. coli Data Collection
Stage 2 Test tubes Data Collection
Conclusion Presentation of findings
AcknowledgementsAcknowledgements
Texas A&M College of Engineering
E3 Staff
NSF
Dr. John Ford