• Thumbnail for Ludwig Knorr
    Ludwig Knorr (2 December 1859 – 4 June 1921) was a German chemist. Together with Carl Paal, he discovered the Paal–Knorr synthesis, and the Knorr quinoline...
    7 KB (685 words) - 18:58, 11 July 2023
  • Paal and Ludwig Knorr in 1884 as a method for the preparation of furans, and has been adapted for pyrroles and thiophenes. Although the Paal–Knorr synthesis...
    15 KB (1,628 words) - 14:29, 8 June 2024
  • Thumbnail for Hindenburg disaster
    Hoehling's claim that Chief Steward Heinrich Kubis told him the Chief Rigger Ludwig Knorr noticed damage of Cell 4 shortly before the disaster. Rumors that the...
    111 KB (13,531 words) - 04:39, 1 September 2024
  • Thumbnail for Knorr pyrrole synthesis
    The Knorr pyrrole synthesis is a widely used chemical reaction that synthesizes substituted pyrroles (3). The method involves the reaction of an α-amino-ketone...
    14 KB (1,546 words) - 23:51, 31 August 2024
  • ammonia- or fish-like odor. The naming of morpholine is attributed to Ludwig Knorr, who incorrectly believed it to be part of the structure of morphine...
    10 KB (786 words) - 00:52, 30 June 2024
  • Thumbnail for Phenazone
    several countries either as an over-the-counter or prescribed drug. Ludwig Knorr was the first to synthesize phenazone, then called antipyrine, in the...
    6 KB (453 words) - 12:44, 14 July 2024
  • Karen Knorr, American photographer Karin Knorr Cetina (born 1944), Austrian sociologist Ludwig Knorr (1859–1921), German chemist Martin J. Knorr (1906–1989)...
    2 KB (252 words) - 08:46, 22 April 2023
  • cover up the loss of the knife, Boerth steals a knife from fellow rigger Ludwig Knorr. Vogel starts to work behind Ritter's back, arresting Boerth and confiscating...
    39 KB (4,910 words) - 12:27, 18 July 2024
  • Domac 1877 1950 1880 Phenazone, "the mother of modern Antipyretics" Ludwig Knorr 1880 1880 1885 Ephedrine Nagai Nagayoshi 1885 1885 1890 Benzocaine August...
    34 KB (2,388 words) - 06:34, 15 August 2024
  • term pyrazole was given to this class of compounds by German Chemist Ludwig Knorr in 1883. In a classical method developed by German chemist Hans von Pechmann...
    12 KB (1,013 words) - 23:18, 9 August 2024
  • continued to give the final product of 4-hydroxyquinoline. However, Ludwig Knorr observed that under higher temperatures (approximately 140 °C) the aniline...
    9 KB (1,046 words) - 03:20, 28 August 2024
  • Thumbnail for Fritz Haber
    an academic appointment, first working as an independent assistant to Ludwig Knorr at the University of Jena between 1892 and 1894.: 32  During his time...
    67 KB (7,274 words) - 07:58, 20 August 2024
  • Thumbnail for Metamizole
    (ARA-4-AA). Metamizole likely induces the CYP2B6 and CYP3A4 enzymes. Ludwig Knorr was a student of Emil Fischer who won the Nobel Prize for his work on...
    53 KB (4,607 words) - 21:09, 15 July 2024
  • Thumbnail for Knorr quinoline synthesis
    2-hydroxyquinoline using sulfuric acid. This reaction was first described by Ludwig Knorr (1859–1921) in 1886 The reaction is a type of electrophilic aromatic...
    2 KB (249 words) - 23:40, 21 March 2024
  • substituents. The first synthesis of pyrazolones was reported in 1883 by Ludwig Knorr, via a condensation reaction between ethyl acetoacetate and phenylhydrazine...
    5 KB (512 words) - 17:48, 25 April 2024
  • Thumbnail for Emil Fischer
    Baeyer Friedrich August Kekulé[citation needed] Doctoral students Alfred Stock Otto Diels Otto Ruff Walter A. Jacobs Ludwig Knorr Oskar Piloty Julius Tafel...
    17 KB (1,758 words) - 09:47, 20 August 2024
  • Thumbnail for Aminophenazone
    system. Aminophenazone was first synthesized by Friedrich Stolz and Ludwig Knorr in the late nineteenth century, and sold as an anti-fever medicine known...
    7 KB (624 words) - 14:38, 10 May 2024
  • studied chemistry at the University of Jena, where he was a student of Ludwig Knorr. In 1900 he became an associate professor in organic chemistry at the...
    2 KB (159 words) - 10:15, 12 January 2023
  • Thumbnail for List of German inventions and discoveries
    1883: Claus process by Carl Friedrich Claus 1884: Paal–Knorr synthesis by Carl Paal and Ludwig Knorr 1885–1886: Discovery of germanium by Clemens Winkler...
    230 KB (19,850 words) - 02:48, 27 August 2024
  • Berlin and later Jena where he studied tautomerism of diketones under Ludwig Knorr. He then went to Berlin to study under his father and was involved in...
    3 KB (365 words) - 10:54, 13 August 2023
  • Physics. Ludwig Knorr: Chemist, who together with Carl Paal, discovered the Paal-Knorr synthesis, and the Knorr quinoline synthesis and Knorr pyrrole synthesis...
    47 KB (5,578 words) - 01:59, 4 April 2024
  • Thumbnail for Ludwig Erhard
    Ludwig Wilhelm Erhard (German: [ˈluːtvɪç ˈʔeːɐ̯haʁt]; 4 February 1897 – 5 May 1977) was a German politician and economist affiliated with the Christian...
    28 KB (2,879 words) - 12:13, 27 August 2024
  • Chemischen Gesellschaft. 35 (2): 1537–1544. doi:10.1002/cber.19020350263. Knorr, Ludwig (1884). "Synthese von Pyrrolderivaten" [Synthesis of pyrrole derivatives]...
    33 KB (3,142 words) - 17:38, 21 February 2024
  • Heinrich Klaproth Fritz Klatte Friedrich Ludwig Knapp Friedrich Knauer Emil Knoevenagel Wilhelm Knop Ludwig Knorr Julius Arnold Koch Christoph Kohl Hermann...
    18 KB (1,467 words) - 23:13, 7 July 2024
  • Thumbnail for June 1921
    to the United States 600,000 tons of confiscated German ships. Died: Ludwig Knorr, 61, German chemist and co-developer of Aspirin A treaty was signed between...
    58 KB (7,265 words) - 14:32, 26 August 2024
  • in 1907. He then worked at the University of Jena in 1908–1909 with Ludwig Knorr and University of Geneva 1910–1911 with P.A. Guye before returning to...
    2 KB (256 words) - 04:38, 24 April 2022
  • Thumbnail for Johann Georg Anton Geuther
    OH group in the molecule. It was long after the death of Geuther when Ludwig Knorr, Geuthers successor at the University of Jena, solved the riddle proving...
    5 KB (496 words) - 21:34, 7 October 2023
  • Erschallt (Verlag Knorr & Hirth, 1934) Im gleichen Schritt und Tritt (Verlag Knorr & Hirth, 1934) Stolz weht die Flagge (Verlag Knorr & Hirth, 1934) Gefiederte...
    9 KB (989 words) - 22:50, 20 March 2024
  • assistant to Wilhelm Pfeffer at the University of Leipzig and under Ludwig Knorr in Jena. From 1915 to 1952 he worked as a chemist at Bayer in Wuppertal-Elberfeld...
    3 KB (325 words) - 09:05, 15 March 2023
  • Thumbnail for Neue Zeitschrift für Musik
    Wieck, Julius Knorr and his close friend Ludwig Schuncke. Its first issue appeared on 3 April 1834. Although the first editor was Julius Knorr, most of the...
    4 KB (339 words) - 13:26, 3 September 2024