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Aswan Low Dam
The Aswan Low Dam, also called the Old Aswan Dam or Assuan Dam, is a masonry buttress dam on the Nile at Aswan, Egypt, built between 1899 and 1902.
Aswan Quarry Landscape
Aswan Quarry Landscape: ancient granite and silicified sandstone quarries at Aswan (أسوان), Egypt, worked from the Early Dynastic Period to Roman times, home of the 42 m, 1,168-ton Unfinished Obelisk and dolerite-pounder quarrying evidence.
Aswan scorpion invasion
Aswan scorpion invasion, November 2021 Egypt event: flash floods from rare thunderstorms washed Androctonus crassicauda and Leiurus quinquestriatus scorpions into Aswan, stinging 503 people, with three disputed deaths.
Aswang
Aswang (asuang) is the umbrella Philippine folklore term for shapeshifting, predatory beings: vampires, viscera suckers, weredogs, witches, and ghouls, documented since 16th-century Spanish accounts and strongly tied to Capiz province.
Aswaran
The Aswaran (اسواران) were the elite heavy cavalry of the Sasanian Iranian army, drawn from the warrior nobility and forming the backbone of its forces.
Aswath Damodaran
Aswath Damodaran is a professor of finance at New York University's Stern School of Business, known as the "Dean of Valuation" for his widely used valuation texts.
Aswathama (film)
Aswathama (అశ్వథామ) is a 2020 Telugu action thriller, Ramana Teja's directorial debut, written by and starring Naga Shourya as Gana, who hunts a serial predator after his sister is mysteriously impregnated; produced by Usha Mulpuri, Ira Creations, released 31 January 2020.
ASXL1
ASXL1 (Additional sex combs-like 1), human homolog of Drosophila Asx on 20q11; BAP1 partner in the PR-DUB deubiquitinase; frequently mutated in MDS, CMML, and AML, and in Bohring–Opitz syndrome.
ASY-EOS experiment
The ASY-EOS experiment is a nuclear-physics series at GSI in Darmstadt, Germany, that measures neutron flows in heavy-ion collisions to determine the nuclear equation of state's symmetry term.
Asya
Asya (Ася) is an 1858 novella by Ivan Turgenev, set in a small German town on the Rhine, where a young Russian narrator fails to propose to the illegitimate Asya in time.
Asya Rolls
Asya Rolls is an Israeli neuroimmunologist and full professor at Tel Aviv University since 2024, previously at the Technion, known for showing that reward-system activation strengthens immunity in mice.
Asylum (Kiss album)
Asylum (1985) is Kiss's 13th studio album on Mercury, the first with lead guitarist Bruce Kulick. Recorded at Electric Lady Studios, it peaked at US #20, went RIAA gold, and produced the hit single "Tears Are Falling."
Asylum and Immigration Tribunal
The Asylum and Immigration Tribunal was the UK's single-tier appeals body for Home Office asylum refusals under the 2004 Act; its functions transferred in 2010 to the First-tier Tribunal's Immigration and Asylum Chamber, now itself set for replacement by an Independent Immigration Appeals Authority.
Asylum claims based on sexual orientation and gender identity
Asylum claims based on sexual orientation and gender identity are refugee claims by people fearing persecution at home, resting on the 1951 Refugee Convention's particular social group ground.
Asylum in the United States
Asylum in the United States is protection for refugees already in or arriving at the country, under INA Section 208 since the 1980 Refugee Act; covers five persecution grounds, one-year filing deadline, affirmative and defensive processes, and 2025-2026 restrictions.
Asylum Records
Asylum Records, American label founded 1971 by David Geffen and Elliot Roberts; singer-songwriter home of Judee Sill, Jackson Browne, Eagles, Joni Mitchell; later a Warner hip-hop imprint, relaunched in the US in 2017.
Asylum seeker
Asylum seeker: a person who has applied for international protection and whose refugee claim, under the 1951 Refugee Convention and 1967 Protocol, is not yet finally decided; 9 million were pending worldwide at end-2025.
Asymchem
Asymchem is a Chinese pharmaceutical contract development and manufacturing organization founded in Tianjin in 1998 by Dr. Hao Hong, dual-listed in Shenzhen and Hong Kong and known for small-molecule manufacturing.
Asymmetric addition of alkynylzinc compounds to aldehydes
The asymmetric addition of alkynylzinc compounds to aldehydes is an enantioselective carbon–carbon bond-forming reaction, directed by chiral ligands, that produces chiral propargylic alcohols in one step.
Asymmetric aircraft
An asymmetric aircraft is one whose engine, crew pod, or fuselage sits off the centerline, best known in the German Blohm & Voss BV 141 reconnaissance plane, first flown in 1938.
Asymmetric aldol reaction
The asymmetric aldol reaction is a carbon–carbon bond-forming reaction between an enolate and an aldehyde or ketone, controlled to give one stereoisomer of the β-hydroxy carbonyl product.
Asymmetric alkynylation of aldehydes
Asymmetric alkynylation of aldehydes, the enantioselective Favorskii reaction, adds metal acetylides to aldehyde carbonyls to yield chiral propargylic alcohols, versatile intermediates made with zinc reagents and chiral ligands.
Asymmetric aziridination
Asymmetric aziridination is any chemical method for making aziridines, three-membered nitrogen-containing rings, with chirality controlled so one enantiomer predominates, giving versatile building blocks for chiral amines.
Asymmetric C–H activation
Asymmetric C–H activation is a class of reactions in which transition-metal catalysts convert carbon–hydrogen bonds into new carbon–carbon or carbon–heteroatom bonds, controlling which mirror-image product forms without prefunctionalization.
Asymmetric carbonyl allylation
Asymmetric carbonyl allylation is the enantioselective addition of allyl groups to aldehydes and ketones, first made enantioselective by Hoffmann in 1978 and catalytically by Yamamoto in 1991.
Asymmetric catalysis
Asymmetric catalysis, also called enantioselective catalysis, uses a small amount of chiral catalyst to make chiral products favoring one enantiomer, key to pharmaceutical and agrochemical synthesis.
Asymmetric counteranion-directed catalysis
Asymmetric counteranion-directed catalysis (ACDC) is an asymmetric ion-pairing strategy in which a chiral anion, rather than a covalent ligand, controls which enantiomer forms, emerging from Mayer and List's 2006 transfer hydrogenations with the bulky phosphate TRIP.
Asymmetric dark matter
Asymmetric dark matter is a class of dark matter models in which dark matter's abundance shares its origin with visible matter's, through an asymmetry between dark particles and dark antiparticles.
Asymmetric dearomatization
Asymmetric dearomatization is a chemical transformation in which an aromatic compound loses its aromaticity while new stereocenters form, popularized under the label CADA by Shu-Li You in 2012.
Asymmetric Diels–Alder reaction
The asymmetric Diels–Alder reaction is a [4+2] cycloaddition between a diene and a dienophile arranged to form one enantiomer, efficiently building chiral six-membered rings with up to four stereocenters.