All articles starting with S

Successor Features

Successor features are a reinforcement learning representation introduced by André Barreto and DeepMind colleagues in 2016 that separates environment dynamics from rewards for transfer learning.

Succimer, also known as meso-2,3-dimercaptosuccinic acid (DMSA), is an orally active chelating agent that binds lead into water-soluble complexes excreted in urine, FDA-approved in 1991 for childhood lead poisoning.

Succinate dehydrogenase

Succinate dehydrogenase (SDH, complex II, succinate-CoQ reductase) is the only mitochondrial enzyme shared by the TCA cycle and electron transport chain, oxidizing succinate to fumarate; SDHx mutations cause hereditary paraganglioma and other tumors.

Succinate semialdehyde dehydrogenase

Succinate semialdehyde dehydrogenase (SSADH, ALDH5A1) is a mitochondrial NAD+-dependent enzyme oxidizing succinic semialdehyde to succinate in the GABA shunt; its deficiency causes SSADHD, a rare epileptic encephalopathy with GHB accumulation.

Succinic acid

Succinic acid, also known as butanedioic acid, is a four-carbon dicarboxylic acid first isolated from amber in 1546, an intermediate of the citric acid cycle.

Succinic anhydride

Succinic anhydride is the cyclic anhydride of succinic acid, a white crystalline solid with formula C₄H₄O₃ used as a resin hardener and in pharmaceuticals, esters, and food processing.

Succinic semialdehyde dehydrogenase deficiency

Succinic semialdehyde dehydrogenase deficiency (SSADHD, 4-hydroxybutyric aciduria, gamma-hydroxybutyric aciduria), ALDH5A1 autosomal recessive GABA metabolism disorder causing intellectual disability, hypotonia, ataxia, epilepsy; prevalence about 1/500,000.

Succinobucol

Succinobucol (AGI-1067), a monosuccinate ester of probucol developed by AtheroGenics, is an antioxidant anti-inflammatory drug candidate for atherosclerosis that reached Phase 3 (ARISE) without approval.

Succinonitrile

Succinonitrile, also called butanedinitrile, is a highly toxic, colorless waxy dinitrile solid melting at 57 °C that forms a plastic crystal used as a solid solvent in battery electrolytes.

Succinyl-CoA

Succinyl-CoA is a coenzyme A thioester of succinic acid and an intermediate of the citric acid cycle, formed from α-ketoglutarate and converted to succinate with GTP production.

Succinyl-CoA synthetase

Succinyl-CoA synthetase, also called succinyl-CoA ligase or succinate thiokinase, is an enzyme that converts succinyl-CoA to succinate while generating GTP or ATP, the citric acid cycle's only substrate-level phosphorylation step.

Succinyl-CoA:3-oxoacid CoA transferase deficiency

SCOT deficiency (SCOTD, OXCT1 deficiency, OMIM 245050) is a rare autosomal recessive ketone-utilization disorder causing potentially fatal ketoacidotic attacks from infancy, treated with glucose, bicarbonate, and a high-carbohydrate diet.

Succinylornithine transaminase

Succinylornithine transaminase (AstC, EC 2.6.1.81, also argM/cstC/ydjW) is a PLP-dependent bacterial aminotransferase, third enzyme of the arginine succinyltransferase pathway, converting N-succinylornithine and alpha-ketoglutarate to succinylglutamic semialdehyde and glutamate.

Succisa

Succisa (devil's-bit scabious genus) is a Caprifoliaceae genus of perennial herbs with hemispheric flower heads, native from Madeira and Cameroon to Siberia; type species Succisa pratensis hosts the marsh fritillary butterfly.

Succosa

Succosa (Subcosa), a Roman road station on the Via Aurelia below the hill town of Cosa in Etruria, near modern Ansedonia/Orbetello; attested only in the Tabula Peutingeriana and Ravennate geographer, distinct from Rome's Sucusa.

Succotash

Succotash (Narragansett msickquatash, "boiled whole kernels of corn") is a North American dish of corn and beans, usually lima beans, rooted in Indigenous Three Sisters agriculture and adapted into Southern and New England cooking.

Succubus

Succubus: a female demon of European folklore that has sexual intercourse with sleeping men, counterpart of the incubus; from Late Latin succuba, linked to Lilith and witch trials, later explained as sleep paralysis.

Succulent plant

Succulent plants, or succulents, are plants that store water in leaves, stems, or roots to survive drought; the trait occurs across many plant families, mostly with water-efficient CAM photosynthesis.

Suceava

Suceava, city and county seat in northeastern Romania, historic capital of Moldavia, later part of Austrian Bukovina (1775–1918), united with Romania in November 1918; county population about 648,000 (2026).

Sep 24, 2026

Sucesos de las Islas Filipinas

Sucesos de las Islas Filipinas is a history of the Spanish Philippines by Antonio de Morga, published in Mexico in 1609, covering the islands from first conquest to 1607.

Oct 3, 2026

Such a Long Journey

Such a Long Journey: 1998 drama film directed by Sturla Gunnarsson, screenplay by Sooni Taraporevala from Rohinton Mistry's Booker-shortlisted 1991 novel; Roshan Seth stars as Bombay bank clerk Gustad Noble in 1971, winning a Genie Award.

Such Brave Girls

Such Brave Girls is a British dark comedy sitcom created by Kat Sadler for BBC Three (2023), starring Sadler, her sister Lizzie Davidson, and Louise Brealey; it won the 2024 BAFTA for Best Scripted Comedy.

Oct 22, 2026

Such Is Life

Such Is Life is an Australian novel by Joseph Furphy, written under the pseudonym Tom Collins and published in 1903, widely regarded as a classic of Australian literature.

Sucha Soorma (ਸੂਚਾ ਸੂਰਮਾ)

Sucha Soorma (ਸੂਚਾ ਸੂਰਮਾ), also called Sucha Soorma 2024 film, is a Punjabi period drama directed by Amitoj Mann starring Babbu Maan as folk legend Sucha Singh; released 20 September 2024, grossing about ₹3.85 crore and streaming on KableOne.