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Sir Alexander Fleming FRS FRSE FRCS [2] (6 August 1881 – 11 March 1955) was a Scottish physician and microbiologist, best known for discovering the world's first ...
The first prototype Fleming valves, built October 1904. Early commercial Fleming valves used in radio receivers, 1919 Fleming valve schematic from US Patent 803,684.. The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve or vacuum tube invented in 1904 by English physicist John Ambrose Fleming as a detector for early radio receivers used in electromagnetic ...
Radiocarbon dating was invented, and became a powerful technique for determining the age of prehistoric animals and plants as well as historical objects. Stellar nucleosynthesis was refined as a theory in 1954 by Fred Hoyle ; the theory was supported by astronomical evidence that showed chemical elements were created by nuclear fusion reactions ...
1929: Alexander Fleming: Penicillin, the first beta-lactam antibiotic; 1929: Lars Onsager's reciprocal relations, a potential fourth law of thermodynamics; 1930: Subrahmanyan Chandrasekhar discovers his eponymous limit of the maximum mass of a white dwarf star; 1931: Kurt Gödel: incompleteness theorems prove formal axiomatic systems are incomplete
Sample of penicillin mould presented by Alexander Fleming to Douglas Macleod in 1935. The discovery of penicillin was one of the most important scientific discoveries in the history of medicine. Ancient societies used moulds to treat infections and in the following centuries many people observed the inhibition of bacterial growth by moulds.
The Fleming lunar crater was jointly named after her and (not closely related) Alexander Fleming; The asteroid 5747 Williamina is named after her. [21] Kathryn Lasky published a book in 2021 about Fleming illustrated by Julianna Swaney called "She Caught the Light: Williamina Stevens Fleming: Astronomer" aimed at young people. [22]
Engineers during World War Two test a model of a Halifax bomber in a wind tunnel, an invention that dates back to 1871.. The following is a list and timeline of innovations as well as inventions and discoveries that involved British people or the United Kingdom including predecessor states in the history of the formation of the United Kingdom.
Inspired by the research of Rutherford, Sir William Ramsay, and Frederick Soddy, the novel predicts the development of atomic weapons, and features a "carolinum"-based hand grenade that does not extinguish once detonated. [4] 1920 – Rutherford postulates the existence of a neutral particle in the atomic nucleus at a Bakerian Lecture in London ...