John Browne (chemist)

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John Browne or Brown (died 1735) was an English chemist, elected Fellow of the Royal Society in 1721. [1]

Fellow of the Royal Society Elected Fellow of the Royal Society, including Honorary, Foreign and Royal Fellows

Fellowship of the Royal Society is an award granted to individuals that the Royal Society of London judges to have made a 'substantial contribution to the improvement of natural knowledge, including mathematics, engineering science and medical science'.

His father John Browne of London was an apothecary, and Browne joined the Society of Apothecaries in 1697. He discovered the presence of magnesia in sea-water, and researched the manufacture of Prussian blue (invented by Johann Jacob Diesbach, in 1706 [2] ), publishing on these topics in the Philosophical Transactions . [1] [3]

Apothecary historical name for a medical professional now called a pharmacist

Apothecary is one term for a medical professional who formulates and dispenses materia medica to physicians, surgeons, and patients. The modern pharmacist has taken over this role. In some languages and regions, the word "apothecary" is still used to refer to a retail pharmacy or a pharmacist who owns one. Apothecaries' investigation of herbal and chemical ingredients was a precursor to the modern sciences of chemistry and pharmacology.

Magnesium oxide chemical compound

Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO and consists of a lattice of Mg2+ ions and O2− ions held together by ionic bonding. Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to separate moisture.

Prussian blue is a dark blue pigment produced by oxidation of ferrous ferrocyanide salts. It has the idealized chemical formula Fe
7
(CN)
18
. Another name for the color is Berlin blue or, in painting, Parisian or Paris blue. Turnbull's blue is the same substance, but is made from different reagents, and its slightly different color stems from different impurities.

Notes

  1. 1 2 McConnell, Anita. "Browne, John". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/3620.(Subscription or UK public library membership required.)
  2. Kraft, Alexander (2008). "On the Discovery and History of Prussian Blue" (PDF). Bull. Hist. Chem. 33 (2): 61–67.
  3. British Association for the Advancement of Science (1863). A history of the trade and manufactures of the Tyne, Wear, and Tees: comprising the papers prepared under the auspices of a committee of local industry and read at the sectional meetings of the British Association, 1863. Lambert. p. 150. Retrieved 7 July 2013.

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