SCIENTIST OF THE DAY


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DECEMBER 17
American chemist, Willard Libby, was born on December 17, 1908. He studied radioactivity in living tissues and developed a dating technique by measuring the carbon-14 activity in organic remain.
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DECEMBER 16
German physicist, Wilhelm Ritter, was born on December 16, 1776. He discovered ultraviolet rays.
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DECEMBER 15
French physicist, Antoine Becquerel, was born on December 15, 1852. He discovered radioactivity, a new property of matter.
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DECEMBER 14
Danish astronomer, Tycho Brahe, was born on December 14, 1546. He made the most accurate celestial observations before the Invention of the telescope.
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DECEMBER 13
German chemist, Johann Dobereiner, was born on December 13, 1780. He discovered the existence of families of three elements with similar chemical properties: chlorine, bromine, and iodine; lithium, sodium and potassium; sulphur, selenium, and tellurium. He called them triads.
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DECEMBER 12
Swiss chemist, Alfred Werner, was born on December 12, 1866. He proposed the octahedral configuration of transition metal complexes, now known as octahedral molecular geometry.
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DECEMBER 11
German physician, Robert Koch, was born on December 11, 1843. He discovered the bacillus, the causative agent responsible for anthrax, tuberculosis, and cholera.
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DECEMBER 10
British mathematician, Augusta King, was born on December 10, 1815. She created a general-purpose computer program. She is recognised as the first computer programmer.
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DECEMBER 9
American chemist, William Hanford, was born on December 9, 1908. He developed the modern process to make polyurethane, a multipurpose material. He also developed the first liquid household detergent.
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DECEMBER 8
American inventor, Eli Whitney, was born on December 8, 1765. He invented the cotton gin, a mechanical device that removes the seeds from cotton, a process that had previously been extremely labor-intensive.
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DECEMBER 7
Prussian physiologist and anatomist, Theodor Schwann, was born on December 7, 1810. He discovered the cells in the nervous system that produce the sheath around axons. They were named Schwann cells in his honor.
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DECEMBER 6
French chemist and physicist, Louis Gay-Lussac, was born on December 6, 1778. He formulated the Gay Lussac Law stating that the volume of all gases increases with higher temperature when pressure is constant.
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DECEMBER 5
German physicist, Arnold Sommerfeld, was born on December 5, 1868. He modified Niels Bohr´s atomic model to include elliptical orbits instead of circular ones.
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DECEMBER 4
American bacteriologist Alfred Day Hershey, was born on December 4, 1908. In 1952, he demonstrated that DNA is the basis of genetic material.
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DECEMBER 3
Peter G. Schultz
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DECEMBER 2
American physician, George Richards Minot, was born on December 2, 1885. He described the effectiveness of iron therapy for the treatment of anemia.
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DECEMBER 1
Italian engineer, Federico Faggin, was born on December 1, 1941. He designed the first commercial microprocessor.
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