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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.

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Revathi, Jacob, and Emily

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  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

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