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Sir John Eccles
Sir John Eccles (1903–1997) was an Australian neurophysiologist who shared the 1963 Nobel Prize for work on ionic mechanisms of excitation and inhibition in nerve cell membranes.
Sir John R. Vane
Sir John R. Vane (1927–2004) was a British pharmacologist who shared the 1982 Nobel Prize in Medicine for showing in 1971 how aspirin works and for prostaglandin discoveries.
Sir John Soane's Museum
Sir John Soane's Museum is the London house and museum of architect John Soane at Lincoln's Inn Fields, preserved by Act of Parliament as at his 1837 death.
Sir Kenneth Blaxter
Sir Kenneth Blaxter (1919–1991) was a British agricultural nutritionist, Director of the Rowett Research Institute from 1965 to 1982, whose metabolisable energy system became Britain's official feeding standard.
Sir Leo Hielscher Bridges
The Sir Leo Hielscher Bridges, originally the Gateway Bridge, are twin toll bridges carrying the Gateway Motorway across the Brisbane River in Brisbane, Australia, the first opened in 1986.
Sir Mix-a-Lot
Sir Mix-a-Lot (Anthony Ray, born 1963) is a Seattle rapper whose 1992 hit "Baby Got Back" topped the Hot 100 for five weeks and won the 1993 Grammy for Best Rap Solo Performance.
SIR model
The SIR model, or SIR epidemic model, is a compartmental model in mathematical epidemiology that divides a population into susceptible, infected, and recovered individuals to predict how disease spreads.
Sir Morris Sugden
Sir Morris Sugden, fully Sir Theodore Morris Sugden, was a British chemist who pioneered measurements of radicals and ions in flames, directed Shell's Thornton Research Centre, and led the Royal Society.
Sir Nevill F. Mott
Sir Nevill Francis Mott (1905–1996) was a British theoretical physicist, Cavendish Professor at Cambridge, who shared the 1977 Nobel Prize in Physics and gave his name to the Mott insulator.
Sir Norman Angell
Sir Norman Angell, born Ralph Norman Angell Lane, was a British journalist and Labour MP whose 1910 book The Great Illusion argued war had become economically futile.
Sir Orfeo
Sir Orfeo is a Middle English Breton lay, composed anonymously around 1300, that retells the Orpheus myth as a fairy story with a happy ending.
Sir Peter Mansfield
Sir Peter Mansfield (1933–2017) was a British physicist at the University of Nottingham who pioneered MRI, invented echo-planar imaging, and shared the 2003 Nobel Prize in Physiology or Medicine.
Sir Richard Wallace, 1st Baronet
Sir Richard Wallace, 1st Baronet (1818-1890), born Richard Jackson, was a British collector, likely illegitimate son of the 4th Marquess of Hertford, inheritor of the Hertford art collection, donor of the Wallace fountains of Paris, and namesake of the Wallace Collection.
Sir Robert Robinson
Sir Robert Robinson was a British organic chemist who won the 1947 Nobel Prize in Chemistry for his work on plant products, especially the alkaloids.
Sir Ronald Cohen
Sir Ronald Cohen, born in Egypt in 1945, is a British financier who built Apax Partners into one of Europe's largest private equity firms before pioneering social impact investment.
Sir Seewoosagur Ramgoolam Botanical Garden
Sir Seewoosagur Ramgoolam Botanical Garden, also called Pamplemousses Garden, is Mauritius's oldest botanical garden, begun in 1736 as a vegetable garden and shaped by Pierre Poivre; famous for giant Victoria amazonica water lilies and palms.
Sir Seewoosagur Ramgoolam International Airport
Sir Seewoosagur Ramgoolam International Airport, also known as Plaisance Airport, is the sole international airport of Mauritius, located at Plaine Magnien in the island's southeast.
Sir Spyro
Sir Spyro is a British grime DJ, producer, and radio host, known for his BBC Radio 1Xtra grime show and for producing Stormzy's 'Big For Your Boots'.
Sir Trill
Sir Trill is a South African amapiano vocalist, songwriter, and producer who rose to prominence in 2021 on hits such as 'Banyana', 'John Wick', and 'Yini Sdakwa'.
Sir William Ramsay
Sir William Ramsay (1852–1916) was a Scottish chemist who discovered five noble gases, helium, neon, argon, krypton, and xenon, and won the 1904 Nobel Prize in Chemistry.
Sir1, ORC-binding domain
Sir1 ORC interaction region (OIR), a 122-amino-acid domain (V490–D611) of yeast Sir1p that binds the Orc1 BAH domain, recruiting Sir1 to HMR/HML silencers to establish transcriptional silencing.
Sira
Sira, plural siyar, is a genre of lengthy Arabic heroic narrative recounting warrior-heroes' adventures in pseudo-historical settings; versions run thousands of pages, with Sīrat ʿAntar the best known.
Sira Abed Rego
Sira Abed Rego, born in Valencia in 1973, is a Spanish politician of Izquierda Unida who has served as Minister for Youth and Children since 2023.
Sira of Ibn Hawshab
The Sira of Ibn Hawshab (سيرة ابن حوشب) is the autobiographical account of the Ismaili missionary who led the da'wa in Yemen in the late ninth century.
Sirai (2025 film)
Sirai (சிறை), 2025 Tamil police procedural drama directed by debutant Suresh Rajakumari, starring Vikram Prabhu as a constable escorting prisoner Abdul Rauf (LK Akshay Kumar) from Vellore jail to Sivagangai court; released 25 December 2025, streams on Zee5.
Siraitia grosvenorii
Siraitia grosvenorii (monk fruit, luo han guo, 罗汉果), a Cucurbitaceae vine native to southern China, produces mogroside V, a cucurbitane triterpene glycoside about 300 times sweeter than sucrose, used as a zero-calorie sweetener and Chinese food-medicine.
Siraj al-Muluk
Siraj al-Muluk (سراج الملوك, "The Lamp of Kings") is an Arabic mirror-for-princes by the Andalusian scholar al-Turtushi, written in Fatimid Egypt for the vizier al-Ma'mun al-Bata'ihi and covering kingship in 64 chapters.
Siraj Aurangabadi
Siraj Aurangabadi (سراج اورنگ آبادی), born Sayyid Siraj-ud-din Hussaini, was an 18th-century Sufi poet of Aurangabad, regarded as Wali Deccani's successor in the Urdu ghazal.
Siraj Din Bulqini
Siraj Din Bulqini (البلقيني، سراج الدين) was a Shafi'i jurist and hadith scholar who served as chief judge of Mamluk Egypt and counted Ibn Hajar al-Asqalani among his students.
Siraj-ud-Daula
Siraj-ud-Daula (সিরাজউদ্দৌলা) was the Nawab of Bengal who lost the Battle of Plassey in June 1757 to the British through the betrayal of his general Mir Jafar.