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Job Title URL to Apply Research Scientist Watch 100 Jim Al-Khalili A brief history of fascinating gravity science talks! Watch mind-expanding talks from Henry Marsh neurosurgeon Henry Marsh, geneticist A life in David Reich, mathematician Hannah brain surgery Fry, astronaut Tim Peake and four other inspiring scientists. Over the coming weeks we will be adding more inspiring talks, exclusively available to our valued subscribers. Not a subscriber? Visit newscientist.com/12042 Tim Peake Hannah Fry To the ends of How to be the Earth and human in the age beyond of the machine David Reich The truth about us, and where we come from Subscribe now Tara Shears Jess Wade Why hasn’t Plastic the LHC found electronics anything new? 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  • Physics Today - February 2003
    Physics Today - February 2003 Rosalind Franklin and the Double Helix Although she made essential contributions toward elucidating the structure of DNA, Rosalind Franklin is known to many only as seen through the distorting lens of James Watson's book, The Double Helix. by Lynne Osman Elkin - California State University, Hayward In 1962, James Watson, then at Harvard University, and Cambridge University's Francis Crick stood next to Maurice Wilkins from King's College, London, to receive the Nobel Prize in Physiology or Medicine for their "discoveries concerning the molecular structure of nucleic acids and its significance for information transfer in living material." Watson and Crick could not have proposed their celebrated structure for DNA as early in 1953 as they did without access to experimental results obtained by King's College scientist Rosalind Franklin. Franklin had died of cancer in 1958 at age 37, and so was ineligible to share the honor. Her conspicuous absence from the awards ceremony--the dramatic culmination of the struggle to determine the structure of DNA--probably contributed to the neglect, for several decades, of Franklin's role in the DNA story. She most likely never knew how significantly her data influenced Watson and Crick's proposal. Franklin was born 25 July 1920 to Muriel Waley Franklin and merchant banker Ellis Franklin, both members of educated and socially conscious Jewish families. They were a close immediate family, prone to lively discussion and vigorous debates at which the politically liberal, logical, and determined Rosalind excelled: She would even argue with her assertive, conservative father. Early in life, Rosalind manifested the creativity and drive characteristic of the Franklin women, and some of the Waley women, who were expected to focus their education, talents, and skills on political, educational, and charitable forms of community service.
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  • Photograph 51, by Rosalind Franklin (1952) [1]
    Published on The Embryo Project Encyclopedia (https://embryo.asu.edu) Photograph 51, by Rosalind Franklin (1952) [1] By: Hernandez, Victoria Keywords: X-ray crystallography [2] DNA [3] DNA Helix [4] On 6 May 1952, at King´s College London in London, England, Rosalind Franklin photographed her fifty-first X-ray diffraction pattern of deoxyribosenucleic acid, or DNA. Photograph 51, or Photo 51, revealed information about DNA´s three-dimensional structure by displaying the way a beam of X-rays scattered off a pure fiber of DNA. Franklin took Photo 51 after scientists confirmed that DNA contained genes [5]. Maurice Wilkins, Franklin´s colleague showed James Watson [6] and Francis Crick [7] Photo 51 without Franklin´s knowledge. Watson and Crick used that image to develop their structural model of DNA. In 1962, after Franklin´s death, Watson, Crick, and Wilkins shared the Nobel Prize in Physiology or Medicine [8] for their findings about DNA. Franklin´s Photo 51 helped scientists learn more about the three-dimensional structure of DNA and enabled scientists to understand DNA´s role in heredity. X-ray crystallography, the technique Franklin used to produce Photo 51 of DNA, is a method scientists use to determine the three-dimensional structure of a crystal. Crystals are solids with regular, repeating units of atoms. Some biological macromolecules, such as DNA, can form fibers suitable for analysis using X-ray crystallography because their solid forms consist of atoms arranged in a regular pattern. Photo 51 used DNA fibers, DNA crystals first produced in the 1970s. To perform an X-ray crystallography, scientists mount a purified fiber or crystal in an X-ray tube.
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  • “Molecular Configuration in Sodium Thymonucleate” (1953), by Rosalind Franklin and Raymond Gosling [1]
    Published on The Embryo Project Encyclopedia (https://embryo.asu.edu) “Molecular Configuration in Sodium Thymonucleate” (1953), by Rosalind Franklin and Raymond Gosling [1] By: Hernandez, Victoria Keywords: DNA [2] DNA Configuration [3] X-ray diffraction [4] DNA fibers [5] In April 1953, Rosalind Franklin and Raymond Gosling, published "Molecular Configuration in Sodium Thymonucleate," in the scientific journal Nature. The article contained Franklin and Gosling´s analysis of their X-ray diffraction pattern of thymonucleate or deoxyribonucleic acid, known as DNA. In the early 1950s, scientists confirmed that genes [6], the heritable factors that control how organisms develop, contained DNA. However, at the time scientists had not determined how DNA functioned or its three- dimensional structure. In their 1953 paper, Franklin and Gosling interpret X-ray diffraction patterns of DNA fibers that they collected, which show the scattering of X-rays from the fibers. The patterns provided information about the three-dimensional structure of the molecule. "Molecular Configuration in Sodium Thymonucleate" shows the progress Franklin and Gosling made toward understanding the three-dimensional structure of DNA. Scientists worked to understand the three-dimensional structure of DNA since the 1930s. In the early to mid-1900s, scientists tried to determine the structures of many biological molecules, such as proteins, because the structure of those molecules indicated their function. By the 1930s, scientists had found that DNA consisted of a chain of building blocks called nucleotides. The nucleotides contained a ring-shaped structure called a sugar. On one side of the sugar, there is a phosphate group, consisting of phosphorus and oxygen and on the other side of the sugar, another ring-shaped structure called a base.
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  • Signer's Gift ÂŒ Rudolf Signer And
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  • 21.8 Commentary GA
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