Tag: chemistry
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Justus von Liebig (1803–1873)
Philip LiebsonChicago, Illinois, United States An extraordinary chemist, Justus von Liebig influenced the development of organic chemistry, scientific teaching of chemistry, and the application of chemistry to physiology and agriculture. He was one of the forerunners of the German educators who influenced the evolution to the outstanding scientific and educational standards of the late nineteenth…
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Friedrich Wöhler (1800–1882)
When the proteins of the human body are broken down to their constituent amino acids, they are converted to ammonia (NH3), which, being toxic, is metabolized in the liver to urea. As the main nitrogenous end product of proteins, urea is found mainly in the blood, but to some extent also in bile, milk, and…
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Berzelius, father of Swedish chemistry
Jons Jakob Berzelius. Engraving by Charles W. Sharpe and published by William Mackenzie, 1860. After Johan Olaf Sodermark. Smithsonian Libraries Image Gallery via Wikimedia. Public domain. Born in 1779 in East Gotland in the southern part of Sweden, Jons Jacob Berzelius descended from an old Swedish family in which many of his ancestors had…
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JLW Thudichum: neglected “Father of neurochemistry”
JMS Pearce Hull, England, United Kingdom Fig 1. Johann Ludwig Wilhelm Thudichum. Photo. National Library of Medicine. Public domain. Knowledge of diseases of the nervous system reflects an understanding of the basic sciences of neural mechanisms and organization. In the last decade of the nineteenth century, the Nobel prizewinners Camillo Golgi and Santiago Ramón…
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Airs and graces: Humphry Davy and science as performance
Alan Bleakley Sennen, West Cornwall, United Kingdom A cartoon featured in an 1807 dissertation by a medical student at the University of Pennsylvania on the “chemical and exhilarating effects of nitrous oxide gas.” The two figures are almost certainly Davy to the right and perhaps Beddoes to the left. Credit: Bulletin of the Society…
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The wayward Paracelsus
JMS Pearce East Yorks, England Fig 1. Aureolus Philippus Theophrastus von Hohenheim (Paracelsus). Via Wikimedia. Alterius non sit qui suus esse potest Let no man be another’s who can be himself Paracelsus 1552 Paracelsus was the most original, controversial character of the Renaissance,1 who brazenly questioned and condemned the dictates of Galen and…
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Kathleen (Yardley) Lonsdale DSc., FR
JMS Pearce Hull, England Fig 1. Dame Kathleen Lonsdale (née Yardley) by Elliott & Fry. 1996. National Portrait gallery. CC BY-NC-ND 3.0 Kathleen Lonsdale (1903-1971) (Fig 1) like her contemporary Dorothy Hodgkin was one of the women pioneers in a man’s world of professional scientists.1 She developed original techniques in X-ray diffraction of crystals…
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Dorothy Crowfoot Hodgkin OM, FRS (1910-1994)
JMS Pearce Hull, England Fig 1: Dorothy Hodgkin. by Godfrey Argent. National Portrait Gallery, London. CC BY-NC-ND 3.0. Dorothy Hodgkin (Fig 1), though not by religion, had close Quaker affinities through her marriage and through her spirited pacifism. She possessed a unique mixture of scientific skills that allowed her to extend the use of…
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Novalis: The white plague and the blue flower
Nicolas Roberto Robles Badajoz, Spain Figure 1. Bust of Novalis at Nikolaifriedhof (Weiβenfels). Photo by Doris Antony on Wikimedia. CC-BY-SA-2.5. Novalis was the pseudonym and pen name of Georg Philipp Friedrich Freiherr1 von Hardenberg, a poet, author, mystic, and philosopher of early German Romanticism. Young Hardenberg adopted the pen name “Novalis” from his twelfth-century…