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Werner Kern (chemist)
Werner Kern (February 9, 1906 in Tiengen, southern Black Forest – January 18, 1985) was a German chemist. Life Kern studied from 1924 to 1928 chemistry and physics in Freiburg and Heidelberg. The promotion took place in 1930 Hermann Staudinger, at which the habilitation on "The Poylacrylsäure, a model of the protein," followed. After a period in industrial research, he became in 1946 professor at the Johannes Gutenberg University of Mainz called in, where he retired 1974th Core was in 1971 with Victor Günter Schulz of the first winner of the Hermann Staudinger price of the Gesellschaft Deutscher Chemiker. Core is considered one of the most important pioneers in the field of preparative macromolecular chemistry . His work in the field of formaldehyde polymer laid the foundation for industrial polymers, such as Hostaform C from Hoechst. Even in an article in 1938 on cross-linking copolymerization of acrylic acid with divinyl he laid the foundation for the core technolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrylic Acid
Acrylic acid (IUPAC: propenoic acid) is an organic compound with the formula CH2=CHCOOH. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid or tart smell. It is miscible with water, alcohols, ethers, and chloroform. More than a million tons are produced annually. History The word "acrylic" was coined in 1843, for a chemical derivative of acrolein, an acrid-smelling oil derived from glycerol. Production Acrylic acid is produced by oxidation of propylene, which is a byproduct of the production of ethylene and gasoline: : 2 CH2=CHCH3 + 3 O2 → 2 CH2=CHCO2H + 2 H2O Historical methods Because acrylic acid and its esters have long been valued commercially, many other methods have been developed. Most have been abandoned for economic or environmental reasons. An early method was the hydrocarboxylation of acetylene (" Reppe chemistry"): : This method req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1985 Deaths
The year 1985 was designated as the International Youth Year by the United Nations. Events January * January 1 ** The Internet's Domain Name System is created. ** Greenland withdraws from the European Economic Community as a result of a new agreement on fishing rights. * January 7 – Japan Aerospace Exploration Agency launches ''Sakigake'', Japan's first interplanetary spacecraft and the first deep space probe to be launched by any country other than the United States space exploration programs, United States or the Soviet space program, Soviet Union. * January 15 – Tancredo Neves is Brazilian presidential election, 1985, elected president of Brazil by the National Congress of Brazil, Congress, ending the Military dictatorship in Brazil, 21-year military rule. * January 20 – Ronald Reagan is Second inauguration of Ronald Reagan, privately sworn in for a second term as Presidency of Ronald Reagan, President of the United States. * January 27 – The Eco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1906 Births
Events January–February * January 12 – Persian Constitutional Revolution: A nationalistic coalition of merchants, religious leaders and intellectuals in Persia forces the shah Mozaffar ad-Din Shah Qajar to grant a constitution, and establish a national assembly, the Majlis. * January 16– April 7 – The Algeciras Conference convenes, to resolve the First Moroccan Crisis between France and Germany. * January 22 – The strikes a reef off Vancouver Island, Canada, killing over 100 (officially 136) in the ensuing disaster. * January 31 – The Ecuador–Colombia earthquake (8.8 on the Moment magnitude scale), and associated tsunami, cause at least 500 deaths. * February 7 – is launched, sparking a naval race between Britain and Germany. * February 11 ** Pope Pius X publishes the encyclical '' Vehementer Nos'', denouncing the 1905 French law on the Separation of the Churches and the State. ** Two British members of a poll tax colle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diaper
A diaper /ˈdaɪpə(r)/ ( American and Canadian English) or a nappy ( Australian English, British English, and Hiberno-English) is a type of underwear that allows the wearer to urinate or defecate without using a toilet, by absorbing or containing waste products to prevent soiling of outer clothing or the external environment. When diapers become wet or soiled, they require changing, generally by a second person such as a parent or caregiver. Failure to change a diaper on a sufficiently regular basis can result in skin problems around the area covered by the diaper. Diapers are made of cloth or synthetic disposable materials. Cloth diapers are composed of layers of fabric such as cotton, hemp, bamboo, microfiber, or even plastic fibers such as PLA or PU, and can be washed and reused multiple times. Disposable diapers contain absorbent chemicals and are thrown away after use. Diapers are primarily worn by infants, toddlers who are not yet toilet trained, and by chi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superabsorbent Polymer
A superabsorbent polymer (SAP) (also called slush powder) is a water-absorbing hydrophilic homopolymers or copolymers that can absorb and retain extremely large amounts of a liquid relative to its own mass. Water-absorbing polymers, which are classified as hydrogels when mixed, absorb aqueous solutions through hydrogen bonding with water molecules. A SAP's ability to absorb water depends on the ionic concentration of the aqueous solution. In deionized and distilled water, a SAP may absorb 300 times its weight (from 30 to 60 times its own volume) and can become up to 99.9% liquid, and when put into a 0.9% saline solution the absorbency drops to approximately 50 times its weight. The presence of valence cations in the solution impedes the polymer's ability to bond with the water molecule. The SAP's total absorbency and swelling capacity are controlled by the type and degree of cross-linkers used to make the gel. Low-density cross-linked SAPs generally have a higher absorbent ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Divinyl
1,3-Butadiene () is the organic compound with the formula (CH2=CH)2. It is a colorless gas that is easily condensed to a liquid. It is important industrially as a precursor to synthetic rubber. The molecule can be viewed as the union of two vinyl groups. It is the simplest conjugated diene. Although butadiene breaks down quickly in the atmosphere, it is nevertheless found in ambient air in urban and suburban areas as a consequence of its constant emission from motor vehicles. The name butadiene can also refer to the isomer, 1,2-butadiene, which is a cumulated diene with structure H2C=C=CH−CH3. This allene has no industrial significance. History In 1863, the French chemist E. Caventou isolated butadiene from the pyrolysis of amyl alcohol. This hydrocarbon was identified as butadiene in 1886, after Henry Edward Armstrong isolated it from among the pyrolysis products of petroleum. In 1910, the Russian chemist Sergei Lebedev polymerized butadiene and obtained a material with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gesellschaft Deutscher Chemiker
The German Chemical Society (German: ', GDCh) is a learned society and professional association founded in 1949 to represent the interests of German chemists in local, national and international contexts. GDCh "brings together people working in chemistry and the molecular sciences and supports their striving for positive, sustainable scientific advance – for the good of humankind and the environment, and a future worth living for."Gesellschaft Deutscher Chemiker (GDCh)About us, Mission Statement and History/ref> History The earliest precursor of today's GDCh was the German Chemical Society (', DChG). Adolf von Baeyer was prominent among the German chemists who established DChG in 1867; and August Wilhelm von Hofmann was the first president. This society was modeled after the British Chemical Society, which was the precursor of the Royal Society of Chemistry. Like its British counterpart, DChG sought to foster the communication of new ideas and facts throughout Germany and acros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Black Forest
The Southern Black Forest (german: Südschwarzwald) is the highest part of the Black Forest, an area heavily transformed by ice age glaciation south of a line roughly from Freiburg im Breisgau to Donaueschingen. The term High Black Forest is not quite identical; that usually includes the highest part of the Central Black Forest, southeast of the Elz valley, as well. The Southern Black Forest Nature Park (''Naturpark Südschwarzwald'') also takes in this area, extending across the whole of the High Black Forest as well as several peripheral areas. Characteristics Unlike the almost parallel mountain ridges and plateaux of the Northern Black Forest and the deeply incised central region, the Southern Black Forest is dominated by a central area of highland, from which most of the large valley emanate. The highest summits of the central highlands are the Feldberg () and the Herzogenhorn (). Towering prominently over the Rhine Plain are the Belchen (), the Schauinsland () and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Staudinger Price
Hermann or Herrmann may refer to: * Hermann (name), list of people with this name * Arminius, chieftain of the Germanic Cherusci tribe in the 1st century, known as Hermann in the German language * Éditions Hermann, French publisher * Hermann, Missouri, a town on the Missouri River in the United States ** Hermann AVA, Missouri wine region * The German SC1000 bomb of World War II was nicknamed the "Hermann" by the British, in reference to Hermann Göring * Herrmann Hall, the former Hotel Del Monte, at the Naval Postgraduate School, Monterey, California * Memorial Hermann Healthcare System, a large health system in Southeast Texas * The Herrmann Brain Dominance Instrument (HBDI), a system to measure and describe thinking preferences in people * Hermann station (other), stations of the name * Hermann (crater), a small lunar impact crater in the western Oceanus Procellarum * Hermann Huppen, a Belgian comic book artist * Hermann 19, an American sailboat design built by Ted Herma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victor Günter Schulz
The name Victor or Viktor may refer to: * Victor (name), including a list of people with the given name, mononym, or surname Arts and entertainment Film * ''Victor'' (1951 film), a French drama film * ''Victor'' (1993 film), a French short film * ''Victor'' (2008 film), a 2008 TV film about Canadian swimmer Victor Davis * ''Victor'' (2009 film), a French comedy * ''Victor'', a 2017 film about Victor Torres by Brandon Dickerson * ''Viktor'' (film), a 2014 Franco/Russian film Music * ''Victor'' (album), a 1996 album by Alex Lifeson * "Victor", a song from the 1979 album ''Eat to the Beat'' by Blondie Businesses * Victor Talking Machine Company, early 20th century American recording company, forerunner of RCA Records * Victor Company of Japan, usually known as JVC, a Japanese electronics corporation originally a subsidiary of the Victor Talking Machine Company ** Victor Entertainment, or JVCKenwood Victor Entertainment, a Japanese record label ** Victor Interactive So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
