All articles starting with S
44,216 articles
Separation of Sister Chromatids
Separation of sister chromatids: anaphase event in which APC/C degrades securin, activating separase, which cleaves centromeric cohesin (RAD21) so replicated chromosomes segregate to daughter cells.
Separation of storage and compute
Separation of storage and compute: cloud data architecture, also called decoupling or disaggregation, where query engines and object storage scale independently. Pioneered by BigQuery (2012) and Snowflake (2014); core pattern of lakehouses.
Separation of variables
Separation of variables is a technique for solving partial differential equations by writing the solution as products of single-variable functions, breaking one PDE into ordinary differential equations.
Separation period (divorce)
A separation period in divorce law is a required interval of living apart or a waiting period that must pass before a divorce can be granted.
Separation principle
The separation principle is a control theory result stating that, for a linear system, the state feedback controller and the state observer can be designed independently while retaining stability or optimality.
Separation process
A separation process, also called separation of mixtures, is a chemical engineering unit operation that divides a mixture into distinct fractions using distillation, filtration, extraction, or crystallization.
Separatism
Separatism: advocacy by a territorially defined group for withdrawal from its state, from autonomy demands to secession. About half of civil wars since 1945 involved secessionism; settlements usually take the form of autonomy, as in Aceh.
Separatist movements of India
Separatist movements of India: Kashmiri, Sikh (Khalistan), and Northeast (Naga, Mizo, Assamese, Manipuri) campaigns for independence or autonomy since 1947, their causes, Pakistan's cross-border role, and the 2025 India-Pakistan war triggered by the Pahalgam attack.
Separative work unit
The separative work unit (SWU) is the standard measure of the effort required to separate isotopes of uranium during enrichment, with the dimension of mass, not energy.
Separatory funnel
A separatory funnel, also called a separating funnel, is pear-shaped laboratory glassware with a stopcock and stopper, used in liquid-liquid extraction to separate immiscible solvent layers of different densities.
Sepax Technology (苏州赛分科技股份有限公司) (赛分科技)
Sepax Technology (赛分科技) is a Suzhou-based biotechnology company making chromatography columns and media, founded by Dr. Huang Xueying and listed on the STAR Market in 2025.
SEPECAT Jaguar
The SEPECAT Jaguar is an Anglo-French twin-engine strike and trainer aircraft, first flown in 1968, that served with the Royal Air Force, the French Air Force, and India.
Sepehr-Jufair Oil Field
Sepehr-Jufair is a pair of onshore oil fields in Khuzestan Province, southwestern Iran, developed together under a 2018 contract and officially commissioned in March 2024 at 50,000 barrels per day.
Seperti Dendam, Rindu Harus Dibayar Tuntas
Seperti Dendam, Rindu Harus Dibayar Tuntas is a 2014 novel by Indonesian writer Eka Kurniawan, translated into English in 2017 as Vengeance is Mine, All Others Pay Cash.
Sepetaprost
Sepetaprost (ONO-9054, DE-126) is a dual FP/EP3 receptor agonist prodrug eye drop for glaucoma and ocular hypertension; phase 3 ANGEL-J1 showed IOP lowering non-inferior to latanoprost.
Sepetiba Bay FSRU
The Sepetiba Bay FSRU is a floating LNG import terminal at Itaguaí in Rio de Janeiro state, Brazil, owned by KARMOL, operated by Karpowership, and operating since 2022.
Seph Schlueter
Seph Schlueter (Joseph Schlueter) is an American contemporary Christian music singer and songwriter known for the 2023 viral single "Counting My Blessings" and for founding Damascus Worship.
Sepha
Sepha (เสภา) is a Thai poetic storytelling genre where a reciter chants narrative verse in klon meter, most famously through Sepha Khun Chang Khun Phaen.
Sephardi Hebrew
Sephardi Hebrew is the traditional liturgical pronunciation of Hebrew used by Sephardi Jews, the descendants of Iberian Jewry; it served as the model for Modern Israeli Hebrew's pronunciation.
Sephardi-Mizrahi Hebrew literature
Sephardi-Mizrahi Hebrew literature is the body of Hebrew writing by Jews of Sephardi and Mizrahi origin, long excluded from an Ashkenazi-defined canon and reexamined by scholarship since the late twentieth century.
Sephardic Jews
Sephardic Jews (Sfaradim, from Sefarad, Hebrew for Spain) descend from Iberian Jewry expelled in 1492 and 1497; they settled across the Ottoman Empire, North Africa, Amsterdam, and the Americas, preserved Ladino, and are often grouped with Mizrahi Jews.
Sephira Mons
Sephira Mons is a 275-km-diameter mons (mountain/volcanic feature) on Venus at 43S, 28E, IAU-approved in 2003 and named after a Spanish goddess of intelligence and creativity.
Sephiroth (Final Fantasy)
Sephiroth (セフィロス) is the main antagonist of the 1997 role-playing game Final Fantasy VII, a former war hero and first-class SOLDIER who sets out to destroy the planet.
Sephora
Sephora is a French prestige beauty retailer owned by LVMH since 1997. Founded in 1969 in Limoges, France, it sells cosmetics, skincare, and fragrance worldwide.
Sepia (cephalopod)
Sepia is a genus of cuttlefishes (family Sepiidae), best known through the common cuttlefish Sepia officinalis of the eastern Atlantic and Mediterranean, defined by a chambered cuttlebone for buoyancy and rapid chromatophore-based camouflage.
Sepia Leste Oil and Gas Field
Sepia Leste is a pre-salt oil and gas field in the Santos Basin, offshore Brazil, with an estimated 130 million barrels of oil equivalent recoverable.
Sepia Oil and Gas Field
Sepia (Sépia) is a giant pre-salt oil and gas field in the Santos Basin, about 200 km offshore Rio de Janeiro, Brazil, producing through the FPSO Carioca since 2021.
Sepia pharaonis
Sepia pharaonis (pharaoh cuttlefish; current combination Acanthosepion pharaonis) is a large Indo-Pacific cuttlefish fished from Japan to East Africa, a five-clade species complex, up to 42 cm and 5 kg, with a 4.79 Gb genome and 12 reflectin genes.
Sepiapterin
Sepiapterin (Sephience, PTC923) is an oral BH4-precursor drug for phenylketonuria, approved in the EU (June 2025) and US (July 2025); it lowers blood phenylalanine more than sapropterin in head-to-head trials.
Sepiapterin reductase
Sepiapterin reductase (SPR, EC 1.1.1.153, SDR38C1) is a homodimeric NADPH-dependent enzyme catalyzing the final step of tetrahydrobiopterin biosynthesis; deficiency causes dopa-responsive dystonia, and its substrate sepiapterin was approved for PKU in 2025.