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Edwin Vedejs
Edwin Vedejs () ( lv, Edvīns Vedējs; January 31, 1941 – December 2, 2017) was a Latvian-American professor of chemistry. In 1967, he joined the organic chemistry faculty at University of Wisconsin. He rose through the ranks during his 32 years at Wisconsin being named Helfaer Professor (1991–1996) and Robert M. Bock Professor (1997–1998). In 1999, he moved to the University of Michigan and served as the Moses Gomberg Collegiate Professor of Chemistry for the final 13 years of his tenure. He was elected a fellow of the American Chemical Society in 2011. After his retirement in 2011, the University of Michigan established the Edwin Vedejs Collegiate Professor of Chemistry Chair. Vedejs died on December 2, 2017, in Madison, Wisconsin. Early life and education Edwin "Ed" Vedejs was born in Riga, Latvia to Velta (nee Robežnieks) and Nikolajs Vedejs. Not long after his birth, the German occupation of Latvia during World War II occurred followed by the Soviet re-occupation of Lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riga, Latvia
Riga (; lv, Rīga , liv, Rīgõ) is the capital and largest city of Latvia and is home to 605,802 inhabitants which is a third of Latvia's population. The city lies on the Gulf of Riga at the mouth of the Daugava river where it meets the Baltic Sea. Riga's territory covers and lies above sea level, on a flat and sandy plain. Riga was founded in 1201 and is a former Hanseatic League member. Riga's historical centre is a UNESCO World Heritage Site, noted for its Art Nouveau/Jugendstil architecture and 19th century wooden architecture. Riga was the European Capital of Culture in 2014, along with Umeå in Sweden. Riga hosted the 2006 NATO Summit, the Eurovision Song Contest 2003, the 2006 IIHF Men's World Ice Hockey Championships, 2013 World Women's Curling Championship and the 2021 IIHF World Championship. It is home to the European Union's office of European Regulators for Electronic Communications (BEREC). In 2017, it was named the European Region of Gastronomy. In 2016 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Rapids Junior College
Grand Rapids Community College (GRCC) is a public community college in Grand Rapids, Michigan. History Grand Rapids Junior College was established on September 21, 1914, after University of Michigan faculty passed a resolution encouraging the establishment of junior colleges in Michigan. Grand Rapids Junior College was the first junior college in Michigan. The college operated out of Central High School, 421 Fountain St. NE, until 1924. The course offerings, based on University of Michigan offerings, were mathematics, history, rhetoric and composition, German, Latin, biology, and physics. All of them were focused on college transfer. The college's first graduating class numbered 49 students, who paid $60 per year for tuition. The following year, to encourage enrollment, tuition was reduced to $40 per year for Grand Rapids residents and $50 for nonresidents. In 1918 Grand Rapids Junior College received its initial accreditation from the North Central Association of Colleges and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latvian Academy Of Sciences
The Latvian Academy of Sciences ( lv, Latvijas Zinātņu akadēmija) is the official Academy of Sciences, science academy of Latvia and is an association of the country's foremost scientists. The academy was founded as the ''Latvian SSR Academy of Sciences'' ( lv, Latvijas PSR Zinātņu akadēmija). It is located in Riga. The current President of the academy is Ivars Kalviņš. Building The Academy of Sciences edifice was built after World War II, between 1951 and 1961, collecting the necessary financing from the newly established kolkhozes in Latvia and – as further expenses increased, collecting the finances as "voluntary donations" deducted from the salaries of the Latvian rural population. The building is decorated with several Hammer and Sickle, hammer and sickle symbols as well as Latvian folk ornaments and motifs. The spire was originally decorated with a wreath and a Red star, five pointed star, which was removed after Latvia regained independence in 1991. Being tall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scott E
Scott may refer to: Places Canada * Scott, Quebec, municipality in the Nouvelle-Beauce regional municipality in Quebec * Scott, Saskatchewan, a town in the Rural Municipality of Tramping Lake No. 380 * Rural Municipality of Scott No. 98, Saskatchewan United States * Scott, Arkansas * Scott, Georgia * Scott, Indiana * Scott, Louisiana * Scott, Missouri * Scott, New York * Scott, Ohio * Scott, Wisconsin (other) (several places) * Fort Scott, Kansas * Great Scott Township, St. Louis County, Minnesota * Scott Air Force Base, Illinois * Scott City, Kansas * Scott City, Missouri * Scott County (other) (various states) * Scott Mountain, a mountain in Oregon * Scott River, in California * Scott Township (other) (several places) Elsewhere * 876 Scott, minor planet orbiting the Sun * Scott (crater), a lunar impact crater near the south pole of the Moon *Scott Conservation Park, a protected area in South Australia People * Scott (surname), including a l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of The American Chemical Society
The ''Journal of the American Chemical Society'' is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society. The journal has absorbed two other publications in its history, the ''Journal of Analytical and Applied Chemistry'' (July 1893) and the ''American Chemical Journal'' (January 1914). It covers all fields of chemistry. Since 2021, the editor-in-chief is Erick M. Carreira (ETH Zurich). In 2014, the journal moved to a hybrid open access publishing model. Abstracting and indexing The journal is abstracted and indexed in Chemical Abstracts Service, Scopus, EBSCO databases, ProQuest databases, Index Medicus/MEDLINE/PubMed, and the Science Citation Index Expanded. According to the ''Journal Citation Reports'', the journal has a 2021 impact factor of 16.383. Editors-in-chief The following people are or have been editor-in-chief: * 1879–1880 – Hermann Endemann * 1880–1881 – Gideon E. Moore * 1881–1882 – Hermann Endemann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxaphosphetane
An oxaphosphetane is a molecule containing a four-membered ring with one phosphorus, one oxygen and two carbon atoms. In a 1,2-oxaphosphetane phosphorus is bonded directly to oxygen, whereas a 1,3-oxaphosphetane has the phosphorus and oxygen atoms at opposite corners. 1,2-Oxaphosphetanes are rarely isolated but are important intermediates in the Wittig reaction and related reactions such as the Seyferth–Gilbert homologation and the Horner–Wadsworth–Emmons reaction. Edwin Vedejs's NMR Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a ... studies first revealed the importance of oxaphosphetanes in the mechanism of the Wittig reaction in the 1970s. References Phosphorus heterocycles Oxygen heterocycles Four-membered rings {{heterocyclic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cytochalasin
Cytochalasins are fungal metabolites that have the ability to bind to actin filaments and block polymerization and the elongation of actin. As a result of the inhibition of actin polymerization, cytochalasins can change cellular morphology, inhibit cellular processes such as cell division, and even cause cells to undergo apoptosis. Cytochalasins have the ability to permeate cell membranes, prevent cellular translocation and cause cells to enucleate. Cytochalasins can also have an effect on other aspects of biological processes unrelated to actin polymerization. For example, cytochalasin A and cytochalasin B can also inhibit the transport of monosaccharides across the cell membrane, cytochalasin H has been found to regulate plant growth, cytochalasin D inhibits protein synthesis and cytochalasin E prevents angiogenesis. Binding to actin filaments Cytochalasins are known to bind to the barbed, fast growing plus ends of microfilaments, which then blocks both the assembly and disassem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mitomycin
The mitomycins are a family of aziridine-containing natural products isolated from ''Streptomyces caespitosus'' or ''Streptomyces lavendulae.'' They include mitomycin A, mitomycin B, and mitomycin C. When the name mitomycin occurs alone, it usually refers to mitomycin C, its international nonproprietary name. Mitomycin C is used as a medicine for treating various disorders associated with the growth and spread of cells. Biosynthesis In general, the biosynthesis of all mitomycins proceeds via combination of 3-amino-5-hydroxybenzoic acid (AHBA), D-glucosamine, and carbamoyl phosphate, to form the mitosane core, followed by specific tailoring steps. The key intermediate, AHBA, is a common precursor to other anticancer drugs, such as rifamycin and ansamycin. Specifically, the biosynthesis begins with the addition of phosphoenolpyruvate (PEP) to erythrose-4-phosphate (E4P) with a yet undiscovered enzyme, which is then ammoniated to give 4-amino-3-deoxy-D-arabino heptulosonic acid- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retronecine
Retronecine is a pyrrolizidine alkaloid found in a variety of plants in the genera ''Senecio'' and ''Crotalaria'', and the family Boraginaceae Boraginaceae, the borage or forget-me-not family, includes about 2,000 species of shrubs, trees and herbs in 146, to 156 genera with a worldwide distribution. The APG IV system from 2016 classifies the Boraginaceae as single family of the order .... It is the most common central core for other pyrrolizidine alkaloids. References Pyrrolizidine alkaloids {{alkaloid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Synthesis
Organic synthesis is a special branch of chemical synthesis and is concerned with the intentional construction of organic compounds. Organic molecules are often more complex than inorganic compounds, and their synthesis has developed into one of the most important branches of organic chemistry. There are several main areas of research within the general area of organic synthesis: ''total synthesis'', ''semisynthesis'', and ''methodology''. Total synthesis A total synthesis is the complete chemical synthesis of complex organic molecules from simple, commercially available petrochemical or natural precursors. Total synthesis may be accomplished either via a linear or convergent approach. In a ''linear'' synthesis—often adequate for simple structures—several steps are performed one after another until the molecule is complete; the chemical compounds made in each step are called synthetic intermediates. Most often, each step in a synthesis refers to a separate rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wittig Example
Wittig is a surname, and may refer to: * Burghardt Wittig (born 1947), German biochemist * Curt Wittig, American chemist * David Wittig (born 1955), American executive * Edward Wittig (1879–1941), Polish sculptor * Ferdinand Wittig (1851-1909), American politician * Georg Wittig (1897–1987), German chemist * Iris Wittig (1928-1978), German military pilot * Johnnie Wittig (1914–1999), former Major League pitcher * Martin C. Wittig (born 1964), German CEO * Michael Wittig (born 1976), American musician * Monique Wittig (1935–2003), French author and feminist theorist * Peter Wittig (born 1954), German diplomat * Rüdiger Wittig (born 1946), German professor of geobotany and ecology * Sigmar Wittig (born 1940), German Chair of the European Space Agency * Susan Wittig Albert (born 1940), American mystery writer See also * Wittich * Wittig River * 1,2-Wittig rearrangement * 2,3-Wittig rearrangement The ,3Wittig rearrangement is the transformation of an allylic ether into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:List Of Nobel Laureates In Chemistry
The Nobel Prize in Chemistry ( sv, Nobelpriset i kemi) is awarded annually by the Royal Swedish Academy of Sciences to scientists in the various fields of chemistry. It is one of the five Nobel Prizes established by the 1895 will and testament, will of Alfred Nobel, who died in 1896. These prizes are awarded for outstanding contributions in chemistry, Nobel Prize in Physics, physics, Nobel Prize in Literature, literature, Nobel Peace Prize, peace, and Nobel Prize in Physiology or Medicine, physiology or medicine. As dictated by Nobel's will, the award is administered by the Nobel Foundation and awarded by the Royal Swedish Academy of Sciences. The first Nobel Prize in Chemistry was awarded in 1901 to Jacobus Henricus van 't Hoff, of the Netherlands. Each recipient receives a medal, a diploma and a monetary award prize that has varied throughout the years. In 1901, van 't Hoff received 150,782 Swedish krona, SEK, which is equal to 7,731,004 SEK in December 2007. The award is pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
