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