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claiming his priority and contesting the originality of
Braconnot's work (Ann Chim 1815, 94, 73). As an application of his laboratory work, it occurred to Braconnot that the "absolute tallow" (similar to stearine) from beef or sheep could be used to make candles. He named that substance "céromimène"
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In the fat domain, Braconnot described in 1815 that fats are formed of a solid part ("absolute tallow") and an oily compound ("absolute oil"), their consistency resulting from the proportions of the two parts. This conclusion was obtained after pressing fats in the cold between filter papers (Ann
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From 1802 to his death, he lived in Nancy where he was named in 1807 as director of the botanical garden and member of the scientific academy of the town. He worked as a chemist until his death mainly on plant chemistry. He made several research on plant assimilation,
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In the domain of plant chemistry, Braconnot contributed to the isolation and the description of several compounds, most of which were shown later to be mixtures of simpler products. Among others, Braconnot discovered
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He was born in
Commercy, his father being a counsel at the local parliament. At the death of his father, in 1787, Henri began his instruction in an elementary school in Commercy and then with private teachers.
321:(wax-like). With Simonin F, a pharmacist in Nancy, he patented in 1818 a process of candle manufacture. An improved process using stearic acid was patented by Chevreul seven years later.
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and acidification
Braconnot separated a solid fraction similar to "adipocire" described by Fourcroy (1806). Unfortunately, he did not observe its acid properties which led
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As these data were similar to the first data obtained by
Chevreul as soon as 1813, the later sent a letter to the journal
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Le pharmacien et chimiste Henri
Braconnot (Commercy 1780-Nancy 1855). Labrude P, Rev Hist Pharm 2003, 51, 61.
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where he learnt in various schools, Museum, school of medicine among others, and followed the lectures of
369:, or honey. By the same acid process, Braconnot obtained a "gelatin sugar" (named later glycocolle, now
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Henry
Braconnot, précurseur ignoré et émule de M.E. Chevreul. François M-Th, Oléagineux 1956, 11, 365.
389:), which could be transformed into a vitreous varnish. This substance may be considered as the first
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446:(copyright free). Permission to copy content here was kindly granted by the author, Claude Leray.
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https://web.archive.org/web/20041011172546/http://www.cyberlipid.org/chevreul/braconnot.htm
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At 13, he was placed as apprentice in a pharmacy in Nancy where he learned and practiced
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Braconnot, sa vie et ses travaux. Nicklès J, Grimblot et veuve
Raybois, Nancy 1856.
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on wood or cotton, Braconnot obtained a flammable product,
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in Paris. Until his death in 1855, he published 112 works.
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43:but its sources remain unclear because it lacks
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414:Labrude, Pierre; Becq, Corinne (2003), "",
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393:or plastic material created by a chemist.
299:Chimie 1815, 93, 225). Furthermore, after
74:Learn how and when to remove this message
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396:In 1825, he discovered a structural
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293:Académie des Sciences
258:Jean-Baptiste Lamarck
208:[ɑ̃ʁibʁakɔno]
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398:heteropolysaccharide
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31:list of references
317:Annales de Chimie
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333:(1818) and
161:discovered
148:Nationality
111:29 May 1780
56:introducing
453:Categories
408:References
339:pyrogallol
282:mineralogy
243:Strasbourg
220:pharmacist
383:collodion
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367:cellulose
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180:Fields
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152:French
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