All articles starting with O
9,097 articles
Oleg Tyurin
Oleg Tyurin (Олег Григорьевич Тюрин), Soviet rower, 1937-2010; won 1964 Tokyo Olympic gold in the double sculls with Boris Dubrovsky, plus World and European medals, all in that event.
Oleg V. Ozerov
Oleg V. Ozerov is an organometallic chemist at Texas A&M University known for pincer-ligand catalysis and carbon–fluorine bond activation, recognized by the 2012 ACS Award in Pure Chemistry.
Oleg V. Prezhdo
Oleg V. Prezhdo, also published as Oleg Prezhdo, is a Ukrainian-born theoretical chemist at USC known for surface-hopping methods and the PYXAID code for solar materials.
Oleg Vasilyev
Oleg Vasilyev (Олег Кимович Васильев), Soviet/Russian pair skater with Yelena Valova: 1984 Olympic champion, 1988 silver, three world titles; later coached 2006 Olympic champions Totmianina and Marinin.
Oleg Yurievich Gusikhin
Oleg Yurievich Gusikhin is a Ford Motor Company data scientist and operations researcher who works on supply chain analytics and was elected to the National Academy of Engineering in 2026.
Oleg Zaytsev
Oleg Zaytsev (Олег Зайцев), Soviet ice hockey defenseman (1939-1993), CSKA Moskva; two Olympic golds (1964, 1968), four world and European titles; distinct from powerlifter and hockey namesakes.
Oleg's campaign against Constantinople
Oleg's campaign against Constantinople (Поход Олега на Константинополь) was a 907 raid by Kievan Rus' under Prince Oleg on Byzantium, which, per the Primary Chronicle, paid tribute and made peace.
Oleg's capture of Kiev
Oleg's capture of Kiev (Захват Киева Олегом) was the 882 seizure of Kiev by Oleg of Novgorod, who killed its princes Askold and Dir by a ruse and made Kiev his capital.
Olegário Mariano
Olegário Mariano (1889–1958) was a Brazilian poet, politician, and diplomat elected to the Academia Brasileira de Letras and named Prince of Brazilian Poets in 1938.
Olegario Víctor Andrade
Olegario Víctor Andrade (1839–1882) was an Argentine Romantic poet and journalist, regarded as the national poet of Argentina, known for El nido de cóndores and Atlántida.
Oļegs Antropovs
Oļegs Antropovs (Oleg Petrovich Antropov, Олег Петрович Антропов), Latvian volleyball player and coach for the USSR; Olympic gold 1968 Mexico City, USSR champion 1969, later coached Russia and JT Thunders Hiroshima; died 2023.
Oleh Hornykiewicz
Oleh Hornykiewicz (1926–2020) was an Austrian pharmacologist who discovered dopamine deficiency in the brains of Parkinson's disease patients and initiated L-DOPA therapy, the foundation of dopamine replacement treatment, earning the Wolf Prize in 1979.
Oleh Hryhorov
Oleh Hryhorov is a Ukrainian official and career police officer, appointed Head of Sumy Oblast State Administration in April 2025 after leading National Police directorates in Luhansk and Zaporizhzhia.
Oleh Ivashchenko (Олег Іванович Іващенко) (Ukrainian general)
Oleh Ivashchenko, also Oleh Ivanovych Ivashchenko, is a Ukrainian Lieutenant General who has led the Defence Intelligence of Ukraine (HUR) since January 2026, after heading the Foreign Intelligence Service from 2024 to 2026.
Oleh Syniehubov
Oleh Syniehubov is a Ukrainian politician serving as Head of the Kharkiv Regional Military Administration, where he leads civil protection, evacuation of frontline residents, and reconstruction in one of Ukraine's regions most affected by Russian strikes.
Oleh Verniaiev
Oleh Verniaiev (Олег Верняєв), Ukrainian artistic gymnast born 1993 in Donetsk; 2016 Olympic parallel bars champion and all-around silver medalist behind Kohei Uchimura, 2014 world parallel bars champion, 2019 world all-around bronze, meldonium ban reduced by CAS in 2023, competed at three Olympics.
Oleic acid
Oleic acid, or cis-9-octadecenoic acid, is a monounsaturated 18-carbon fatty acid and the principal fatty acid of olive oil, making up 63–80% of its fats.
Olein
Olein is the liquid fraction obtained when palm oil or another vegetable oil is fractionated from its solid stearin, used in cooking oils and margarine.
Oleksa Dovbush
Oleksa Dovbush (Олекса Довбуш, 1700–1745) was a Ukrainian peasant from Pechenizhyn who led the opryshky, outlaw bands raiding nobles and merchants in the Carpathians until he was shot in 1745.
Oleksa Hirnyk
Oleksa Hirnyk (Олекса Гірник) was a Ukrainian dissident who immolated himself at Taras Shevchenko's grave in Kaniv in 1978, protesting Russification of Ukraine; he was named a Hero of Ukraine in 2007.
Oleksa Tykhy
Oleksa Tykhy (Олекса Тихий) was a Ukrainian teacher and dissident, a founding member of the Ukrainian Helsinki Group who died in a Soviet labor camp in 1984.
Oleksandr Bilash
Oleksandr Bilash (Олександр Білаш, 1931–2003) was a Ukrainian composer and poet best known for lyrical songs such as "Dva kol'ory" and "Iaseny," honored as Hero of Ukraine.
Oleksandr Ganzha
Oleksandr Ganzha, born in 1981, is a Ukrainian politician and police general who has served as head of the Dnipropetrovsk Oblast State Administration since January 2026.
Oleksandr Gvozdyk (Олександр Сергійович Гвоздик)
Oleksandr Gvozdyk (Олександр Сергійович Гвоздик), "The Nail", Ukrainian boxer born 1987 in Kharkiv; 2012 Olympic bronze medalist and WBC light heavyweight champion 2018-2019, dethroning Adonis Stevenson before losing to Artur Beterbiev.
Oleksandr Hanja
Oleksandr Hanja (Олександр Ганжа), born 1981 in Myrnohrad, is a Ukrainian police general and jurist who led the Dnipropetrovsk regional police from 2023 and has headed the oblast state administration since January 2026.
Oleksandr Hanža
Oleksandr Hanža (Олександр Ганжа) is a Ukrainian police general who has headed the Dnipropetrovsk Oblast Military Administration since January 2026, after leading the region's National Police from 2023.
Oleksandr Hrekov
Oleksandr Hrekov (Олександр Греків, also rendered Grekov; 1875 to 1959) was a Ukrainian general, Minister of Military Affairs of the Ukrainian People's Republic, and commander in the Chortkiv offensive of 1919.
Oleksandr Khyzhniak
Oleksandr Khyzhniak (Олександр Хижняк), Ukrainian boxer born 1995 in Poltava; Tokyo 2020 middleweight silver medalist, Paris 2024 80 kg Olympic gold medalist, 2017 world and European champion, professional since 2026.
Oleksandr Koval (Rivne Oblast politician)
Oleksandr Koval is a Ukrainian politician who serves as Head of the Rivne Oblast State Administration in northwestern Ukraine, working on defense along the Belarusian border, mobilization, and wartime energy resilience.
Oleksandr Kravchenko
Oleksandr Kravchenko (born 1983) is a Ukrainian economist and former Managing Partner of McKinsey & Company Ukraine who has served as Minister of Economy and Environment of Ukraine since 2026.