Tag Archives: birthdays

Birthdays, July 27

Today is the birthday of Friedrich Dorn, born in 1848, he was the first person to discover that a radioactive substance radon was emitted from radium. He called it emanation, it was renamed radon by an international body of scientists.

Today is also the birthday of Hans Fisher, born in 1881, he received the Nobel Prize in 1930 for his synthesis of bilirubin and haemin, he also investigated bile pigments, cholorophyll and pyrrole.

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Birthdays July 26

Today is the birthday of Robert Remak, born in 1815, he is responsible for the three germ layer tissue theory: endoderm, mesoderm and ectoderm. He also discovered unmyelinated nerve fibers in the heart that are now called Remak’s ganglia, he discovered that the origin of cells is by cell division of preexisting cells.

Paul Walden, born in 1863, invented the walden inversion in stereochemistry

And Lenka Kotkova, born in 1973, she discovered the asteroid, 60001 Adelka

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Birthdays, July 23

Today is the birthday of Etienne Malus, born in 1775, he was a mathematician who studied geometric light.  Being a mathematician, he also studied line geometry and line systems called ray systems. He used these ray systems to prove Christiaan Huygen’s theory of light. His theory of double refraction of light in crystals was published in 1810.  He is probably best known for Malus’ Law giving the resultant intensity, when a polarizer is placed in the path of an incident light beam.

Today is also the birthday of

Walter Schottky, born in 1886 who invented the screen-grid vacuum tube

And Vladimir Prelog, born in 1906 who is famous for the Cahn, Ingold, Prelog sequence used in organic chemistry to name stereoisomers with an R/S descriptor, or an E/Z descriptor for double bonds. He is the source of anecdotes about almost all eminent chemists and his scientific opus encompasses over 400 works.

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