1. Outline:4/23/07 Today: Finish Chapter 22 The Benign Hamburger è Hand in seminar reports – to me è Last seminar Wednesday @ 4pm… è Do HCTA’s on-line è One week to go…

2. HCTA On-line n n Teacher & Course evaluations done on-line for this course. n n Please logon to: http://surveys.cs.hope.edu/surveys/HCTA/index.pl n Please do this before Wednesday! If 90% of my section completes the HCTA, I’ll give you all 5 free quiz points!!!

3. Quiz #10 n Please put books/notes away… n Turn your quiz over when done…

4. Quiz #10 n Please pass your quiz to the right…

5. Summary of Nuclear Chem: n n Modern atomic theory - definitions n n Binding energy & stability n n Nuclear reactions - transmutations n n First order decay - half-life n n Radiation & interaction with matter: Applications…. A Case Study: Food irradiation

6. What’s the case about? How many people have experienced food poisoning? How common is it? http://money.cnn.com/2007/04/21/news/beef_recall.reut/index.htm?postversion=2007042111 http://www.nbc11.com/newslinks/12657567/detail.html

7. How common is it? http://money.cnn.com/2007/04/21/news/beef_recall.reut/index.htm?postversion=2007042111

8. CAPA -22 (Due Wednesday) Question #1 (3 pts): Write up a one- paragraph answer to one of the research questions you were given. Question #2 (3 pts): Did you learn anything from the class discussion? Question #3 (4 pts): Write up a one- paragraph opinion for the FDA rule?