Leitz inverted microscope, circa 1958

Article Abstract:

A slight modification to Leitz's inverted chemist's microscope, popular among crystallographers in 1950s, became the main instrument for cell culture work. Leonard Hayflick, professor of anatomy at the University of California, San Francisco, used this microscope for the discovery of Mycoplasma pneumoniae, the determination of normal human diploid cells that undergo a limited number of doublings and the development of a vaccine-producing cell strain, "WI-38".

United States, Usage, Mycoplasma, Cell culture, Microscope and microscopy, Microscopes, 1950 AD, Hayflick, Leonard

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Tuberculin, 1890

Article Abstract:

Robert Koch developed a substance, tuberculin, capable of preventing the growth of the tubercle bacille, thus arresting the disease in 1890 for, which he was presented the 1905 Nobel Prize for Physiology ort Medicine. Von Pirquet reported in 1907 that how a drop of tuberlin on sacrificed skin served as a test for tuberculosis.

Germany, Achievements and awards, Nobel laureates, Nobel Prizes, Koch, Robert, Tuberculin, 1905 AD

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