Wöhler t (8 Ergebnisse)
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Verlag: Schnell + Steiner, 1999
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In den WarenkorbTaschenbuch. Zustand: Sehr gut. 1. Auflage, 1999 * Einband: leichte Lagerspuren * Seiten: wie ungelesen.
Sur la Formation de l'Huile d'Amandes amères. (+) Emploi d'un nouveau Médicament en place des Waux distillées du Laurier-Cerise ou d'Amandes amères, proposé par. F. Woehler et J. Liebig.
"WÖHLER, F. et J. LIEBIG. - THE DISCOVERY OF "EMULSIN" A MAIN WORK IN ORGANIC CHEMISTRY.
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In den WarenkorbParis, Crochard et Comp., 1837. Orig. printed wrappers. No backstrip. In: "Annales de Chimie et de Physique, Par MM. Gay-Lussac et Arago.", tome 64, Cahier 2 (Fevrier 1837). Pp. 113-224. (Entire issue offered with printed wrappers.). Wöhler a. Liebig's papers: pp. 185-209 a. pp. 209-217. First appearance of this classic paper in… organic chemistry in which Wöhler and Liebig showed how Amygdalin could be decomposed by a vegetable emulsion, the first example of a glycoside. The papers were issued at the same time in "Annalen der Physik und Chemie"."The conclusions which you have drawn from the investigation of bitter-almond oil," wrote Berzelius to Liebig and Wöhler, "are certainly the most importent which have so far been reached in the domain of vegetable chemistry, and give promise of shedding an unexpected light over this part of the science.The facts which you have set forth inspire such reflections that they may be regarded as the dawn of a new day in vegetable chemistry."(Berzelius-Wöhler Briefwechsel)."During the years that Liebig was preoccupied with the ether theory and with organic acids, he also carried out two importent investigations with Wöhler. In october 1836 Wöhler wrote that he had discovered a way to transform amygdalin to oil of bitter almonds and hydrocyanid acis, by distilling it with manganese and sulfuric acid, and he invited Liebig to join in pursuing the topic. Two days later he made a more remarkable discovery. It had occurred to him that perhaps thetransformation of amygdalin could be effected by the albumin in the almonds, in a manner similar to the action of yeast in sugar.Wöhler suspected that the decomposition was an example of what Berzelius had recently defined as catalysis. Liebig and Wöhler then divided up the detailed examination of the properties and composition of amygdalin. They precipitated from the emulsion of almonds a substance which when dissolved retain its action. They named the active substance "emulsion". Its effectiveness in very small quantities confirmed that it acted like yeast."(DSB VIII, p. 342).
Ueber die Bildung des Bittermandelöls. (+) Vorschlag zur Einführung eines neuen Arzneimittels anstatt des destillirten Kirschlorbeer- und Bittermandelswassers. (+) Ueber Marcet's Xanthic-Oxyd. (3 papers all by Wöhler u. Liebig).
"WÖHLER, F. und J. LIEBIG. - THE DISCOVERY OF "EMULSIN" A MAIN WORK IN ORGANIC CHEMISTRY.
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In den WarenkorbLeipzig, Johann Ambrosius Barth, 1837. Without wrappers as issued in "Annalen der Physik und Chemie. Hrsg.von Poggendorff", Bd. 41, Zweites Stück. (Entire issue No 6 offered). Titlepage to vol. 41. Pp. 225-448 a. 2 folded engraved plates. Wöhler & Liebig's papers: pp. 345-366, pp. 366-374 a. pp. 393-397. Clean and fine. First ap…pearance of this classic paper in organic chemistry in which Wöhler and Liebig showed how Amygdalin could be decomposed by a vegetable emulsion, the first example of a glycoside."The conclusions which you have drawn from the investigation of bitter-almond oil," wrote Berzelius to Liebig and Wöhler, "are certainly the most importent which have so far been reached in the domain of vegetable chemistry, and give promise of shedding an unexpected light over this part of the science.The facts which you have set forth inspire such reflections that they may be regarded as the dawn of a new day in vegetable chemistry."(Berzelius-Wöhler Briefwechsel)."During the years that Liebig was preoccupied with the ether theory and with organic acids, he also carried out two importent investigations with Wöhler. In october 1836 Wöhler wrote that he had discovered a way to transform amygdalin to oil of bitter almonds and hydrocyanid acis, by distilling it with manganese and sulfuric acid, and he invited Liebig to join in pursuing the topic. Two days later he made a more remarkable discovery. It had occurred to him that perhaps thetransformation of amygdalin could be effected by the albumin in the almonds, in a manner similar to the action of yeast in sugar.Wöhler suspected that the decomposition was an example of what Berzelius had recently defined as catalysis. Liebig and Wöhler then divided up the detailed examination of the properties and composition of amygdalin. They precipitated from the emulsion of almonds a substance which when dissolved retain its action. They named the active substance "emulsion". Its effectiveness in very small quantities confirmed that it acted like yeast."(DSB VIII, p. 342).
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In den Warenkorb(Paris, Crochard, 1828). 8vo. Without wrappers. Extract from 'Annales de Chimie et de Physique', Series 2 - Volume 37. Pp. 330-334. First appearance in French of this milestone paper, marking the beginnings of organic chemistry, in which Wöhler describes how he managed to synthezise urea from cyanate of ammonia. The French versi…on here is translated from the German paper "Ueber künstliche Bildung des Harnstoffs.", which was issued the same year (1828). This broke down the old distinction between organic and inorganic substances. "This was the first synthesis of an organic compound, and this accomplishment is generally regarded as the beginning of organic chemistry."(Sparrow "Milestones of Science", p.37). The discovery destroyed the vitalistic theory which held that organic compounds could be produced only by living organisms, and led eventually to the brilliant results that have been achieved in attempts to synthesize other organic compounds.Dibner: Heralds of Science, no. 45. - Sparrow: Milestones of Science, no. 197. - Garrison & Morton, no. 671. See also DSB XIV p.475.
Bildung der Cyansäure auf neuem Wege, und fernere Untersuchungen über die Cyansäure und deren Salze.
"WÖHLER, FRIEDRICH - THE PREPATORY WORK OF ORGANIC CHEMISTRY.
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In den WarenkorbLeipzig, Johann Ambrosius Barth, 1823. 8vo. Contemp. hcalf. Gilt spine and with gilt lettering. Some scratches to spine. In: "Annalen der Physik und der Physikalischen Chemie. Hrsg. Ludwig Wilhelm Gilbert", Bd. 13 (= Bd. 73 der Reihe). (12),444 pp., 1 folded table and 5 engraved plates. Small stamp to verso of titlepages. Intern…ally clean and fine. Wöhler's paper: pp. 157-172. First printing of Wöhler's importent paper in which he in reality for the first time synthezised an organic substance, leading to his historic preparation of "artificial" urea in 1828 "Ueber künstliche Bildung des Harnstoffs". This broke down the old distinction between organic and inorganic substances. "This was the first synthesis of an organic compound, and this accomplishment is generally regarded as the beginning of organic chemistry."(Sparrow "Milestones of Science", p.37, the 1828 paper)."In his published paper (the 1828 paper) Wöhler referred to his work of 1823 (the offered paper), in which he had shown that cyanogen and aqueous ammonia yielded oxalic acid and a white crystalline solid that he now realized was urea. This, and his new method, he considered to be remarkable examples of the preparation "by art" of a substance of animal origin from inorganic materials."(DSB).The volume contains other notable papers BECQUEREL: "Ueber die Electricitäts-Erregung durc Druck, nach versuchen des herrn becquerel" ein bericht abgestatt. von Biot. Frei übersetzt von Gilbert", pp. 117-129. A pioneer paper on Piezoelectricity. SEEBECK "Notiz von neuen electrisch-magnetischen Versuchen des Herrn Seebeck. mitgeteilt von Hrn Oersted.", pp. 430-32. Also papers by Heinr. Rose, Döbereiner, Lampadius, Sertürner etc. etc.
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In den WarenkorbLeipzig, Johann Ambrosius Barth, 1828. Without wrappers as issued in "Annalen der Physik und Chemie. Hrsg.von Poggendorff", Bd. 12, Zweites Stück. Pp. 161-336 (the entire issue offered (Heft 2) together with the titlepage to 12. Band). Wöhler's paper: pp. 253-256. Clean and fine, printed on good paper. First appearance of this m…ilestone paper, marking the beginnings of organic chemistry, in which Wöhler describes how he managed to synthezise urea from cyanate of ammonia. This broke down the old distinction between organic and inorganic substances. "This was the first synthesis of an organic compound, and this accomplishment is generally regarded as the beginning of organic chemistry."(Sparrow "Milestones of Science", p.37). The discovery destroyed the vitalistic theory which held that organic compounds could be produced only by living organisms, and led eventually to the brilliant results that have been achieved in attempts to synthesize other organic compounds.Dibner: Heralds of Science, no. 45. - Sparrow: Milestones of Science, no. 197. - Garrison & Morton, no. 671. See also DSB XIV p.475.
