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Alkanolamine
Alkanolamines, also called amino alcohols, are organic compounds with both an amino group and a hydroxyl group on an alkane backbone, used chiefly in gas purification and cosmetics.
Alkanolamine synthesis and reactions
Alkanolamine synthesis and reactions covers how amino alcohols such as the ethanolamines are prepared industrially, chiefly from ethylene oxide and ammonia, and how their amine and hydroxyl groups react.
Alkap
Alkap (আলকাপ), also known as panchras, is a Bengali folk song-drama mixing song, dance, dialogue, comedy, and social satire, performed overnight in Murshidabad and Malda villages.
Alkaptonuria
Alkaptonuria (AKU, alcaptonuria) is a rare autosomal recessive HGD-enzyme deficiency causing homogentisic acid buildup, dark urine, ochronosis, and spinal arthritis; nitisinone is the first disease-modifying treatment.
Alkem Laboratories
Alkem Laboratories is an Indian pharmaceutical company founded by Samprada Singh in 1973, ranking among India's largest makers of branded formulations like Pan and Clavam.
Alkene
An alkene, also called an olefin, is an unsaturated hydrocarbon containing one carbon–carbon double bond, with the general formula CnH2n and two fewer hydrogens than the corresponding alkane.
Alkene diazidation
Alkene diazidation is an organic reaction that adds two azide groups across an alkene's double bond, giving a vicinal diazide easily reduced to a 1,2-diamine.
Alkene difunctionalization
Alkene difunctionalization is the installation of two functional groups, identical or different, across a carbon–carbon double bond in a single operation, often via nickel, copper, or photoredox catalysis.
Alkenone paleothermometry
Alkenone paleothermometry is a method for reconstructing past sea surface temperature from alkenone compounds produced by haptophyte algae, introduced in 1986 and applied worldwide to Quaternary and older sediments.
Alkenylation
Alkenylation is a carbon–carbon bond-forming reaction that installs an alkenyl (vinyl) group onto a molecule, most commonly through the palladium-catalyzed Mizoroki–Heck reaction, recognized by the 2010 Nobel Prize.
Alkenylboronic acid
Alkenylboronic acids are organoboron compounds with a boronic acid group bonded directly to an alkene carbon, prized in Suzuki–Miyaura coupling because the alkene's geometry is preserved, enabling syntheses of retinoid drugs.
Alkeon Innovation
Alkeon Innovation is the venture and growth-investment platform of Alkeon Capital Management, a New York firm at 350 Madison Avenue that has raised about $2.1 billion since 2020.
Alkes L. Price
Alkes L. Price is a statistical geneticist, formerly Professor of Statistical Genetics at the Harvard T.H. Chan School of Public Health, known for the PCA correction of GWAS and LD Score regression.
Alkhobar power plant
The Alkhobar power plant is an oil-fired steam-turbine power and seawater desalination complex on Saudi Arabia's Gulf coast at Al-Khobar, Eastern Province, with a listed capacity of 818 MW.
Alkhurma haemorrhagic fever
Alkhurma haemorrhagic fever is a tick-borne viral disease caused by a flavivirus related to Kyasanur Forest disease virus, first identified in Jeddah, Saudi Arabia, in 1995, with no vaccine.
Alki David (Αλκιβιάδης Δαυίδ)
Alki David (Αλκιβιάδης Δαυίδ), born 1968 in Lagos, is a British-Greek heir to a Coca-Cola bottling fortune and founder of FilmOn, Hologram USA, and SwissX, known for network copyright suits, an SEC fraud settlement, and large California sexual-misconduct judgments.
Alkmaar
Alkmaar is a city and municipality in North Holland, Netherlands, known for its cheese market on the Waagplein and its resistance to the 1573 Spanish siege.
Alkonost Dorsa
Alkonost Dorsa, a 730-km-long dorsum (ridge belt) on Venus at 5.0S, 341.0E, quadrangle V-43; IAU-named in 1997 after the East Slavic wonder bird with a woman's face.
Alkoxide
An alkoxide (alkoxide ion, RO⁻) is the conjugate base of an alcohol, a strongly basic ion used in ether synthesis and, bonded to metals, in sol-gel chemistry.
Alkoxy radical
An alkoxy radical (RO·) is a high-energy, oxygen-centered radical in organic chemistry that drives hydrogen atom transfer, β-scission, and alkene addition, with roles in synthesis and atmospheric oxidation.
Alkoxy radical chemistry
Alkoxy radical chemistry studies oxygen-centered radicals (RO·) generated from alcohols, valued in organic synthesis for cleaving strong C–C bonds, functionalizing C–H bonds, and forming rings, with a role in atmospheric oxidation.
Alkoxylation
Alkoxylation is an industrial ring-opening reaction that adds ethylene oxide or propylene oxide to alcohol or amine starters, building ether chains for surfactants and polyurethane polyols.
Alkyd resin
An alkyd resin is an oil-modified polyester made from a polyol, a dibasic acid, and vegetable oil, first synthesized in the mid-1920s and now among the most widely used binders in paints and coatings.
Alkyl and mixed alkyl–aryl phosphines
Alkyl and mixed alkyl–aryl phosphines are phosphine ligands for transition-metal catalysis, stronger electron donors than arylphosphines because their steric bulk and electronics can be tuned independently.
Alkyl cross-coupling
Alkyl cross-coupling is a class of transition-metal-catalyzed reactions forming carbon–carbon bonds at sp3-hybridized carbons, covering alkyl Kumada, Negishi, Suzuki, and Hiyama variants, with nickel the most versatile metal.
Alkyl group
An alkyl group, also called an alkyl chain, is a univalent group derived from an alkane by removal of one hydrogen atom, named by replacing the alkane's -ane ending with -yl.
Alkyl mercury compounds
Alkyl mercury compounds (alkylmercurials), organic mercury compounds with mercury bonded to an alkyl group, chiefly methylmercury and ethylmercury; neurotoxic, thiol-binding, biomagnified in fish, historically used as seed fungicides.
Alkyl polyglycosides
Alkyl polyglycosides (APGs, alkyl polyglucosides) are green non-ionic surfactants made by acid-catalyzed condensation of sugars and fatty alcohols; used in detergents, cosmetics, and enhanced oil recovery, FDA GRAS for food-cleaning uses.
Alkylated diphenylamine antioxidants
Alkylated diphenylamine antioxidants are chain-breaking radical scavengers built on a diphenylamine core with alkyl groups, used in lubricating oils, rubbers, and plastics, and outperforming hindered phenols at high temperatures.
Alkylation
Alkylation is the transfer of an alkyl group from one chemical species to another, forming a new carbon–carbon or carbon–heteroatom bond, including Friedel–Crafts, enolate, Williamson, and refinery processes.