Rosalind Franklin

Rosalind Franklin

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  • Rosalind Franklin By: Avery Lynch
  • References view/15014-Franklin-s-X-ray-diffraction -explanation-of-x-ray-pattern-.html 
  • I'm Rosalind Franklin! 
  • I went to a school in Paris and learned different diffraction techniques for x-rays from Jacques Mering.
  • I started researching x-ray crystallography. I was able to capture 2 sets of high resolution photos of crystallized DNA fibers.
  • King's College, London
  • Hypothesis: The structure of DNA is made of simple shapes and patterns.
  • To get these pictures, I used 2 different DNA fibers. 
  • 1 fiber was more hydrated than the other. The water was the main reason I was able to get such clear pictures.
  • Independent Variable: The water added to the 1st fiber.
  • When studying these photos, I noticed that the pattern was very simple and symmetrical. 
  • I noticed that the DNA formed a helical structure and that the phosphates were on the outside. 
  • Dependent Variable: The high resolution of the x-ray photos. 
  • I published all of my x-ray data and wrote papers about my discovery of the 3D DNA structure.
  • My x-ray diffraction photo was a big contribution to the discovery of the DNA structure.
  • Control: The fiber without as much water.
  • Experimental Group: The fiber with more water.
  • Photo 51 is now known as one of the most important photos ever taken in biology!
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