1 / 23

Revathi, Jacob, and Emily

Revathi, Jacob, and Emily. What is Sr-90?. Sr-90. Radioactive isotope of Strontium 90 38 Sr--> 0 -1 e + 90 39 Y beta decay   half life: 28 years. Strontium is. Alkaline earth metal. Why we care about Sr-90. cancer causing mimics calcium absorbed into bone and bone marrow.

leala
Download Presentation

Revathi, Jacob, and Emily

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Revathi, Jacob, and Emily

  2. What is Sr-90?

  3. Sr-90 • Radioactive isotope of Strontium • 90 38 Sr-->0-1e + 9039Y • beta decay   • half life: 28 years

  4. Strontium is... Alkaline earth metal

  5. Why we care about Sr-90 cancer causingmimics calciumabsorbed into bone and bone marrow

  6. It is linked to... • bone cancer • cancer of soft tissue near bone • lukemia • breast cancer

  7. A Brief History of Sr-90

  8. 1790: Non-radioactive strontium Adair Crawford and William Cruikshank   in the mineral strontianite

  9. 1940's: Radioactive Sr-90:   Discovered in nuclear experiments during the development of the atomic bomb.

  10. 1950-60's:     Strontium-90 Spreads 

  11. Nuclear Arms Race Nuclear weapons tests performed in  atmosphere: Sr-90 spreads across  world

  12. Chernoybl Effect Chernoybl=Nuclear Power Plant triggered release of Sr-90

  13. 1958: 1 pCi/grCa = level of Sr-90 in Baby teeth in US

  14. 1960's-Present: • 1968: Nuclear Non-Proliferation Treaty • 1992: Limited Test Band Treaty • 1996: Comprehensive Nuclear Test Ban Treaty

  15. Sr-90 Projects/Orginizations: • Peace Farm •  University Citizens         Against Radioactive        Environment        (UCARE) • Tooth Fairy Project

  16. What is The Tooth Fairy Project?

  17. It is... • study done in 1958 • rising concentrations of Sr-90 • caused by nuclear power plants

  18. 3 sources: 1. nuclear weapons testing  2. 1986 Chernobyl nuclear power plant accident 3. radioactive releases into environment

  19. Baby teeth can help track the effects of radiation on humans

  20. Sr-90 and plutonium contaminate baby teeth  • detonation of over 2,000 nuclear weapons from 1940's- 1990's

  21. In Summation... Sr-90HistoryThe Tooth Fairy Project

  22. THANK YOU, MY LOVELIES

  23. Bibliography http://epa.gov/radiation/radionuclides/strontium.html#affecthealthhttp://prop1.org/ice/toothfairy.htmhttps://docs.google.com/a/newton.k12.ma.us/document/d/1QqlQz8FgrjMBbVXBQXKe2wNthJ_RIWwuQs50Ju2dZrI/edit?hl=en_UShttp://peacefarm.us/ Photoshttp://blog.nydental.com/wp-content/uploads/2011/01/kid-teeth.bmphttp://www.ptable.com/Images/periodic%20table.pnghttp://thebonearchitect.files.wordpress.com/2011/04/strontium.jpghttp://www.nlm.nih.gov/medlineplus/images/longbone.jpghttp://www.dimensionsguide.com/wp-content/uploads/2010/01/Nuclear-Power-Plant.jpghttp://wtf.thebizzare.com/images/nuclear_weapons_testing.jpehttp://jwa.org/system/files/onthemap/Baby_Teeth.jpghttp://www.indymedia.org.uk/images/2010/11/467242.pnghttp://rickpdx.files.wordpress.com/2009/08/nuclearshell.jpghttp://maurice.strahlen.org/minerals/pics/strontianite-karasug.jpghttp://1.bp.blogspot.com/_-z_rDOQSZD4/TEspxWgCR_I/AAAAAAAAAHY/QCcXvZiQsCE/s1600/mad_scientist.gifhttp://www.diabetesmine.com/wp-content/uploads/2010/08/baby-teeth.jpg http://www.topnews.in/files/us-congress_0.jpg http://cache.gawkerassets.com/assets/images/39/2011/01/medium_teeth11011.jpg http://www.topnews.in/files/us-congress_0.jpg http://israelseen.com/shows/United-Nations.jpg http://cdn.edwardkhoo.com/wp-content/uploads/2008/06/nuclear-explosion.png

More Related