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Adolph Emmerling
Adolph Emmerling (13 June 1842, Freiburg im Breisgau – 17 March 1906, Baden-Baden) was a German chemist, known for his research in the field of agricultural chemistry. He studied chemistry at the University of Freiburg, receiving his doctorate in 1865. Following graduation, he spent several years as a laboratory assistant in Freiburg and Heidelberg.Nature, Volume 73 edited by Sir In 1870 he became director of the ''Landwirtschaftlichen Versuchsstation Kiel'' (Agricultural Experimental Station in ), a post he maintained until his death. In 1874 he obtained ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freiburg Im Breisgau
Freiburg im Breisgau (; abbreviated as Freiburg i. Br. or Freiburg i. B.; Low Alemannic German, Low Alemannic: ''Friburg im Brisgau''), commonly referred to as Freiburg, is an independent city in Baden-Württemberg, Germany. With a population of about 230,000 (as of 31 December 2018), Freiburg is the List of cities in Baden-Württemberg by population, fourth-largest city in Baden-Württemberg after Stuttgart, Mannheim, and Karlsruhe. The population of the Freiburg metropolitan area was 656,753 in 2018. In the Southern Germany, south-west of the country, it straddles the Dreisam river, at the foot of the Schlossberg (Freiburg), Schlossberg. Historically, the city has acted as the hub of the Breisgau region on the western edge of the Black Forest in the Upper Rhine Plain. A famous old German university town, and Roman Catholic Archdiocese of Freiburg, archiepiscopal seat, Freiburg was incorporated in the early twelfth century and developed into a major commercial, intellectual, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron Filings
Iron filings are very small pieces of iron that look like a light Powder (substance), powder. As the name suggests, iron filings were traditionally obtained from metal working operations as the scrap material filed off larger iron and steel parts. They are very often used in science demonstrations to show the direction of a magnetic field. Since iron is a ferromagnetic material, a magnetic field induces each particle to become a tiny bar magnet. The south pole of each particle then attracts the north poles of its neighbors, and this process is repeated over a wide area creates chains of filings parallel to the direction of the magnetic field. Iron Filings are used in many places, including schools where they test the reaction of the filings to magnets. They are also used in some toys, most famously Wooly Willy, where they serve to mimic hair on a cartoon face. See also *Coherer (Iron filings tube) {{DEFAULTSORT:Iron Filings Iron [Baidu] |
Scientists From Freiburg Im Breisgau
A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales (circa 624-545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. In modern times, many scientists have advanced degrees in an area of science and pursue careers in various sectors of the economy such as academia, industry, government, and nonprofit environments.'''' History The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1906 Deaths
Nineteen or 19 may refer to: * 19 (number), the natural number following 18 and preceding 20 * one of the years 19 BC, AD 19, 1919, 2019 Films * ''19'' (film), a 2001 Japanese film * ''Nineteen'' (film), a 1987 science fiction film Music * 19 (band), a Japanese pop music duo Albums * ''19'' (Adele album), 2008 * ''19'', a 2003 album by Alsou * ''19'', a 2006 album by Evan Yo * ''19'', a 2018 album by MHD * ''19'', one half of the double album ''63/19'' by Kool A.D. * ''Number Nineteen'', a 1971 album by American jazz pianist Mal Waldron * ''XIX'' (EP), a 2019 EP by 1the9 Songs * "19" (song), a 1985 song by British musician Paul Hardcastle. * "Nineteen", a song by Bad4Good from the 1992 album '' Refugee'' * "Nineteen", a song by Karma to Burn from the 2001 album ''Almost Heathen''. * "Nineteen" (song), a 2007 song by American singer Billy Ray Cyrus. * "Nineteen", a song by Tegan and Sara from the 2007 album '' The Con''. * "XIX" (song), a 2014 song by Slipk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1842 Births
__NOTOC__ Year 184 ( CLXXXIV) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Eggius and Aelianus (or, less frequently, year 937 ''Ab urbe condita''). The denomination 184 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place China * The Yellow Turban Rebellion and Liang Province Rebellion break out in China. * The Disasters of the Partisan Prohibitions ends. * Zhang Jue leads the peasant revolt against Emperor Ling of Han of the Eastern Han Dynasty. Heading for the capital of Luoyang, his massive and undisciplined army (360,000 men), burns and destroys government offices and outposts. * June – Ling of Han places his brother-in-law, He Jin, in command of the imperial army and sends them to attack the Yellow Turban rebels. * Winter – Zha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Albert Weber
Carl Albert Weber (13 January 1856, Spandau – 11 September 1931, Bremen) was a German botanist. He specialized in studies of original bog vegetation, the botanical composition of peat and on the developmental history of peatlands. Biography He studied under Alexander Braun at the University of Berlin and with Julius von Sachs at Würzburg. After receiving his PhD in 1879, he worked as an assistant under Anton de Bary at the University of Strasbourg. From 1884 to 1894 he was a teacher at the agricultural institute in Hohenwestedt, followed by 30 years of research as a botanist at the ''Preußische Moor-Versuchsstation'' (Prussian Moor Research Station) in Bremen. In 1909 he obtained the title of professor. In retirement he remained active in peat bog research. Selected works * ''Ueber specifische Assimilationsenergie'', 1879 (dissertation) – On specific assimilation energy. * ''Leitfaden für den Unterricht in der Physik an Ackerbauschulen und landwirtschaftlichen Win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Germany
Northern Germany (german: link=no, Norddeutschland) is a linguistic, geographic, socio-cultural and historic region in the northern part of Germany which includes the coastal states of Schleswig-Holstein, Mecklenburg-Vorpommern and Lower Saxony and the three city-states Berlin, Hamburg and Bremen. It contrasts with Southern Germany, Western Germany and Eastern Germany. Language Northern Germany generally refers to the ''Sprachraum'' area north of the Uerdingen and Benrath line isoglosses, where Low German dialects are spoken. These comprise the Low Saxon dialects in the west (including the Westphalian language area up to the Rhineland), the East Low German region along the Baltic coast with Western Pomerania, the Altmark and northern Brandenburg, as well as the North Low German dialects. Although from the 19th century onwards, the use of Standard German was strongly promoted especially by the Prussian administration, Low German dialects are still present in rural areas, with an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific 3D structure that determines its activity. A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called peptides. The individual amino acid residues are bonded together by peptide bonds and adjacent amino acid residues. The sequence of amino acid residue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludwig Darmstaedter
Ludwig Darmstaedter (9 August 1846 – 18 October 1927) was a German chemist and historian of science. From 1865 he studied chemistry under Robert Bunsen and Emil Erlenmeyer at the University of Heidelberg, then furthered his education in Leipzig as a student of Hermann Kolbe. Afterwards, he relocated to Berlin, where he performed studies on alkali fusion of sulfonic acids in the laboratory of Karl Hermann Wichelhaus. From 1872, with Benno Jaffé, he was involved with industrial chemical research; e.g. glycerin extraction. Later on in his career, he conducted investigations on the composition and synthesis of lanolin.Darmstaedter, Ludwig in: Neue Deutsche Biographie 3 (1957), S. 516 f. ( Georg Lockemann) His interest in the historical deve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Edward Thorpe
Sir Thomas Edward Thorpe CB, FRS HFRSE LLD (8 December 1845 – 23 February 1925) was a British chemist. From 1894 to 1909 he was Chief Chemist to the British Government, as Director of the Government Laboratory. Early life and education Thorpe was born at Barnes Green in Harpurhey, Manchester, the son of George Thorpe, a cotton merchant at Trafford Bank, and his wife Mary Wilde. He was educated at Hulme Grammar School. Thorpe originally worked as a clerk, but in 1863 began working as an assistant to Henry Roscoe, a professor of chemistry at Owen's College, Manchester, where he gained a degree in Chemistry. Thorpe then undertook postgraduate studies at the University of Heidelberg, gaining his doctorate ( PhD). Academic career After a time working for August Kekulé in Bonn Thorpe returned to Britain in 1870 to accept a Chair at the Andersonian Institute (now the University of Strathclyde) in Glasgow. He later held posts at the Yorkshire College of Science (now the Univer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baeyer–Emmerling Indole Synthesis
The Baeyer–Emmerling indole synthesis is a method for synthesizing indole from a (substituted) ''ortho''-nitrocinnamic acid and iron powder in strongly basic solution. This reaction was discovered by Adolf von Baeyer and Adolph Emmerling in 1869. Reaction mechanism The reaction of iron powder with ''o''-nitrocinnamic acid reduces the nitro group to a nitroso. The nitrogen then condenses with a carbon on the alkene chain with loss of a molecule of water to form a ring. Decarboxylation gives indole. See also * Baeyer–Drewson indigo synthesis The Baeyer–Drewson indigo synthesis (1882) is an organic reaction in which indigo is prepared from 2-nitrobenzaldehyde and acetone The reaction was developed by von Baeyer in 1880 to produce the first synthetic indigo at laboratory ... References {{DEFAULTSORT:Baeyer-Emmerling Indole Synthesis Indole forming reactions Organic reactions Name reactions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potash
Potash () includes various mined and manufactured salts that contain potassium in water-soluble form.Potash USGS 2008 Minerals Yearbook The name derives from ''pot ash'', plant ashes or soaked in water in a pot, the primary means of manufacturing potash before the . The word '''' is derived from ''potash''. Potash is produced worldwide in amounts exceeding 90 million |
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