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Florence Seibert and the Tuberculosis Test

Florence Seibert and the Tuberculosis Test

Harald Sack
On October 6, 1897, American biochemist Florence Barbara Seibert was born. Seibert is best known for identifying the active agent in the antigen tuberculin as a protein, and subsequently for isolating a pure form of tuberculin, purified protein derivative (PPD), enabling the development and use of a reliable TB test. Youth and Education Seibert was born in Easton, Pennsylvania, USA, the second of three children of George Peter Seibert, a rug manufacturer…
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chemistry
Alexander Todd and the Chemistry of Nucleotide Coenzymes

Alexander Todd and the Chemistry of Nucleotide Coenzymes

Harald Sack
On October 2, 1907, British chemist and Nobel laureate Alexander Robertus Todd, Baron Todd was born. Todd‘s research on the structure and synthesis of nucleotides, nucleosides, and nucleotide coenzymes gained him the Nobel Prize for Chemistry. Youth and Education Alexander R. Todd was born near Glasgow, Scotland, the elder son of Alexander Todd, a business man of that city, and his wife Jean Lowrie. In 1918 Todd gained admission to the Allan…
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chemistry
Harrison Brown and the Isolation of Plutonium

Harrison Brown and the Isolation of Plutonium

Harald Sack
On September 26, 1916, American nuclear chemist and geochemist Harrison Scott Brown was born. Brown is generally known for his role in isolating plutonium for its use in the first atomic bombs and for his studies regarding meteorites and the Earth’s origin. He also was a political activist, who lectured and wrote on the issues of arms limitation, natural resources and world hunger. Harrison Brown – Youth and Education Harrison Brown was…
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chemistry
Albert Szent-Györgyi and the DIscovery of Vitamin C

Albert Szent-Györgyi and the DIscovery of Vitamin C

Harald Sack
On September 16, 1893, Hungarian biochemist and Nobel laureate Albert Szent-Györgyi was born. Albert Szent-Györgyi is credited with discovering vitamin C and the components and reactions of the citric acid cycle. “Discovery consists of looking at the same thing as everyone else and thinking something different.” Attributed to Szent-Györgyi in: IEEE (1985) Bridging the present and the future: IEEE Professional Communication Society conference record, Williamsburg, Virginia, October 16-18, 1985. p. 14. Youth…
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chemistry
Luis Federico Leloir and the Metabolic Pathways of Lactose

Luis Federico Leloir and the Metabolic Pathways of Lactose

Harald Sack
On September 6, 1906, Argentine physicist and biochemist Luis Federico Leloir was born. Leloir received the 1970 Nobel Prize in Chemistry for his discovery of the metabolic pathways in lactose, becoming only the third Argentine to receive the prestigious honor in any field. His research has led to significant progress in understanding, diagnosing and treating the congenital disease galactosemia. “This is only one step in a much larger project. I discovered (no, not…
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chemistry
Jacobus Henricus van ‘t Hoff and Physical Chemistry

Jacobus Henricus van ‘t Hoff and Physical Chemistry

Tabea Tietz
On August 30, 1852, Dutch physical chemist Jacobus Henricus Van ‘t Hoff was born. Van ‘t Hoff was the first winner of the Nobel Prize in Chemistry. His pioneering work helped found the modern theory of chemical affinity, chemical equilibrium, chemical kinetics, and chemical thermodynamics. He formulated the theory of the tetrahedral carbon atom and laid the foundations of stereochemistry and predicted the correct structures of allenes and cumulenes as well as their…
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chemistry
Sir Henry Tizard – Octane Rating and Radar Technology

Sir Henry Tizard – Octane Rating and Radar Technology

Harald Sack
On August 23, 1885, English chemist and inventor Sir Henry Thomas Tizard was born. Tizard developed the modern “octane rating” used to classify petrol, helped to develop radar in World War II, and led the first serious studies of UFOs. Education and World War I Henry Tizard was born in Gillingham, Kent, the only son of Thomas Henry Tizard (1839–1924), naval officer and hydrographer, and his wife, Mary Elizabeth Churchward. His ambition to…
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chemistry
Julius Lothar Meyer – Inventor of the Periodic Law

Julius Lothar Meyer – Inventor of the Periodic Law

Harald Sack
On August 19, 1830, German chemist Julius Lothar Meyer was born. Meyer was one of the pioneers in developing the first periodic table of chemical elements. He discovered the Periodic Law, independently of Dmitry Mendeleev, at about the same time (1869). However, he did not develop the periodic classification of the chemical elements as thoroughly as Mendeleev. “That the as yet undivided chemical elements are absolutely irreducible substances, is currently at least…
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chemistry
Frederick Sanger and the Structure of Proteins

Frederick Sanger and the Structure of Proteins

Harald Sack
On August 13, 1918, British biochemist Frederick Sanger was born. In 1958, he was awarded a Nobel Prize in chemistry “for his work on the structure of proteins, especially that of insulin“. In 1980, Walter Gilbert and Sanger shared half of the chemistry prize “for their contributions concerning the determination of base sequences in nucleic acids“. “Scientific research is one of the most exciting and rewarding of occupations. It is like a…
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chemistry
Paul Walden and the Walden Inversion

Paul Walden and the Walden Inversion

Harald Sack
On July 26, 1863, Russian and Latvian-German chemist Paul Walden was born. Walden is known for his work in stereochemistry and history of chemistry. In particular he invented the stereochemical reaction known as Walden inversion and synthesized the first room-temperature ionic liquid, ethylammonium nitrate. Born in Latvia among 13 Children Paul Walden was born in Rozula in present-day Stalbe parish, Pārgauja municipality, Latvia as the youngest of 13 children in a peasant…
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