All articles starting with O
9,097 articles
Octanitrocubane
Octanitrocubane is a powerful organic explosive with a nitro group on each carbon of a cubane cage, first synthesized in 2000 by Philip Eaton and Mao-Xi Zhang in Chicago.
Octanoate
Octanoate is the anion, salts, and esters of octanoic acid (caprylic acid), an eight-carbon saturated fatty acid occurring in milk, palm oil, and coconut oil, and used in IVIG purification.
Octanoyltransferase
Octanoyltransferase (LipB, EC 2.3.1.181; human LIPT2) transfers an octanoyl group from octanoyl-ACP to lipoyl domains, the first step of lipoic acid biosynthesis, via a Cys169 thioester intermediate.
Octans
Octans is a faint southern constellation, created by Nicolas Louis de Lacaille in the 1750s, that contains the south celestial pole and its dim pole star Sigma Octantis.
Octantis Cavi
Octantis Cavi: an IAU-approved 1991 cavus (hollows) feature on Mars, about 65-71 km across near 52.7S, 46W, named from Antoniadi's 1930 albedo map; unrelated to the star nu Octantis.
Octapharma
Octapharma is a Swiss pharmaceutical company headquartered in Lachen, Switzerland, that produces therapies from human plasma; founded by Wolfgang Marguerre in 1983, it reported record sales of €3.64 billion in 2025.
Octava real
The octava real (Italian ottava rima) is a stanza of eight hendecasyllabic lines rhymed ABABABCC, the standard meter of Renaissance epic in Italy, Spain, and Portugal.
Octave
Octave: musical interval with a 2:1 frequency ratio, 1,200 cents, basis of octave equivalence and 12-TET tuning; Pythagorean comma about 24 cents; subjective octave stretched about 20 cents.
Octave Bioscience Inc
Octave Bioscience Inc is a precision-neurology company founded in 2014 in Menlo Park, California, whose Octave MSDA Test measures 18 protein biomarkers to score multiple sclerosis disease activity.
Octave Gengou
Octave Gengou (1875–1957) was a Belgian bacteriologist who co-discovered the whooping-cough bacillus with Jules Bordet in 1906 and developed the first pertussis vaccine in 1912.
Octave Levenspiel
Octave Levenspiel is a chemical engineer and Oregon State University professor known as the founder of chemical reaction engineering and author of its standard 1962 textbook.
Octave One live
Octave One is a live techno act from Detroit formed around brothers Lenny and Lawrence Burden, known for performing exclusively on hardware and for the 2002 hit "Black Water".
OCTAVE trial (NCT01458574)
OCTAVE Sustain (NCT01458574), also called the OCTAVE maintenance trial, was Pfizer's phase 3 trial of tofacitinib maintenance therapy in 593 ulcerative colitis responders, showing 34.3–40.6% remission at 52 weeks versus 11.1% placebo.
OCTAVE trial (NCT01458951)
OCTAVE Induction 2 (NCT01458951), also called the CP-690,550 OCTAVE study, was Pfizer's phase 3 trial of tofacitinib 10 mg twice daily for 8 weeks in 541 patients with moderate-to-severe ulcerative colitis; remission 16.6% vs 3.6% placebo.
OCTAVE trial (NCT01465763)
OCTAVE Induction 1 (NCT01465763) was a phase 3, placebo-controlled trial testing oral tofacitinib 10 mg twice daily as 8-week induction therapy for moderate-to-severe ulcerative colitis.
OCTAVE trial (NCT01470612)
OCTAVE Open (NCT01470612), also called the OCTAVE long-term extension trial, was Pfizer's phase 3 open-label extension of tofacitinib in ulcerative colitis: 944 patients, up to 7.0 years, stable safety with elevated herpes zoster rates and efficacy maintained to 36 months.
Octavia E. Butler
Octavia E. Butler (1947–2006), American science fiction author of Kindred and the Parable novels; first SF writer to win a MacArthur Fellowship (1995), two-time Hugo and Nebula winner, archive at the Huntington Library.
Octavia Red
Octavia Red is an American pornographic film actress specializing in girl/girl scenes, with over 300 scenes for roughly 20 major studios and AVN and XMA awards in 2025 and 2026.
Octavia Spencer
Octavia Spencer, born 1970 in Montgomery, Alabama, is an American actress who won the Best Supporting Actress Oscar for The Help (2011) and earned further nominations for Hidden Figures and The Shape of Water.
Octavia St. Laurent
Octavia St. Laurent (1964–2009), also known as Heavenly Angel Octavia St. Laurent Manolo Blahnik, was an American transgender performer, model aspirant, and ballroom icon featured in Paris Is Burning and How Do I Look.
Octavia the Younger
Octavia the Younger (Octavia Minor), sister of Augustus and wife of Mark Antony, mediated between the triumvirs, was the first woman portrayed on Roman coins, and ancestress of Caligula, Claudius, and Nero.
Octavio Dotel
Octavio Dotel (1973-2025), Dominican MLB relief pitcher who played for a record 13 teams (1999-2013), won the 2011 World Series with St. Louis, and died in the 2025 Jet Set nightclub roof collapse in Santo Domingo.
Octávio Frias de Oliveira Bridge
The Octávio Frias de Oliveira Bridge, known locally as the Ponte Estaiada, is a cable-stayed bridge over the Pinheiros River in São Paulo, Brazil, opened in 2008.
Octavio Ocaña
Octavio Ocaña (Octavio Augusto Pérez Ocaña, 1998-2021), Mexican actor famous as Benito Rivers in Televisa's Vecinos from 2005; also Lola... Érase una vez, Hermanos y detectives; died of a gunshot after a police chase in Cuautitlán Izcalli, later ruled a homicide; one officer sentenced in 2023.
Octavio Paz
Octavio Paz (1914–1998), Mexican poet and essayist, 1990 Nobel laureate in Literature and first Mexican to win it. Author of El laberinto de la soledad, Piedra de sol, and Blanco; ambassador to India who resigned after the 1968 Tlatelolco massacre; founder of Plural and Vuelta.
Octavio Paz Prize
The Octavio Paz Prize (Premio Internacional Octavio Paz de Poesía y Ensayo) is an annual Mexican award for poetry or literary criticism, honoring the poet Octavio Paz.
Octaviolca
Octaviolca (Ottaviolca), Roman settlement in the Regio Cantabrorum named by Ptolemy and listed on the Itinerario de Barro between Legio VII Gemina and Portus Blendium; usually identified with Rebolledo-Camesa, Valdeolea, Cantabria.
Octavius Brooks Frothingham
Octavius Brooks Frothingham (1822–1895) was an American Unitarian minister, first president of the Free Religious Association, and leading spokesman for a religion of humanity rejecting traditional Christian doctrines.
OCTB (反黑)
OCTB (反黑) is a 2017 Hong Kong crime drama set in the 1990s before the handover, starring Jordan Chan as a former undercover detective rejoining the anti-triad unit.
Octet (computing)
An octet is a group of exactly eight bits, a unit of data used especially in network protocol specifications, where byte is avoided because some systems historically used bytes of other sizes.