All articles starting with S
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Si'um
Si'um, also spelled Siium, was a Gutian ruler named in some recensions of the Sumerian King List as penultimate king, with a reign of 7 years.
Si3 (சிங்கம் 3) (film)
Si3 (Singam 3, சிங்கம் 3), also titled S3, is Hari's 2017 Tamil action film, third in the Singam series, with Suriya as Durai Singam investigating a commissioner's murder in Andhra Pradesh, plus Anushka Shetty, Shruti Haasan, Harris Jayaraj's music, and mixed reviews.
Si5s
Si5s is a handwritten writing system for American Sign Language created by Robert Arnold starting in 2003 at Gallaudet and released in 2010; its open-source offshoot is ASLwrite.
Sia
Sia (Sia Kate Isobelle Furler, born 1975, Adelaide) is an Australian pop singer-songwriter behind "Chandelier" and "Cheap Thrills", the album 1000 Forms of Fear, the supergroup LSD, and hits written for Rihanna and Beyoncé; distinct from the Sia storage network and other SIA organizations.
Sia discography
Sia discography: studio albums by Australian singer Sia Kate Isobelle Furler from OnlySee (1997) to Reasonable Woman (2024), plus the LSD supergroup album, Music soundtrack, Everyday Is Christmas, and songs written for Rihanna, David Guetta, and others.
SIA Engineering Company
SIA Engineering Company is a Singapore-based provider of aircraft maintenance, repair, and overhaul services, majority owned by Singapore Airlines and serving more than 80 international airlines.
Sia Figiel
Sia Figiel (born 1967) was a Samoan novelist, poet, and performance artist whose debut novel where we once belonged (1996) won a Commonwealth Writers' Prize.
Sia Houchangnia
Sia Houchangnia is a partner at Seedcamp who co-leads the Investment Team, having joined the firm as an intern in 2014 and made partner within four years.
Sia Nemat-Nasser
Sia Nemat-Nasser, born Siavouche Nemat-Nasser in Tehran in 1936, was an Iranian-born American materials scientist and Distinguished Professor at UC San Diego who died in 2021.
Sia Tolno
Sia Tolno is a Guinean singer and songwriter born in 1975 in Guéckédou, who won the 2011 RFI Découvertes Award and recorded African Woman with Tony Allen.
Sia, the Dream of the Python
Sia, the Dream of the Python (Sia, le rêve du python) is a 2001 Burkinabé epic drama by Dani Kouyaté, adapted from Moussa Diagana's play on the Soninké Wagadu myth, about a virgin chosen for sacrifice to a Python god.
Siachen conflict
Siachen conflict: India-Pakistan military standoff since 1984 over the Siachen Glacier, where the Line of Control ends at NJ9842; Operation Meghdoot gave India the Saltoro heights, with a ceasefire since 2003.
Siachen Glacier
Siachen Glacier, eastern Karakoram glacier, second longest outside the polar regions; since India's 1984 Operation Meghdoot the world's highest battlefield, disputed by India and Pakistan, with ceasefire since 2003, heavy waste pollution, and accelerating negative mass balance.
Siad Barre
Mohamed Siad Barre, Somali military dictator who ruled 1969-1991 after a bloodless coup, adopted scientific socialism, allied with the USSR then the US, lost the Ogaden War, bombed Hargeisa, and fled Mogadishu in 1991.
SIAI-Marchetti S.211
The SIAI-Marchetti S.211, later Aermacchi S-211, is an Italian turbofan-powered military jet trainer first flown in 1981, serving with the air forces of Singapore, the Philippines, and Haiti.
SIAI-Marchetti SF.260
The SIAI-Marchetti SF.260, later the Leonardo SF-260, is an Italian three-seat, single-engine light aircraft designed by Stelio Frati that became a widely used military primary trainer, with 976 built from 1964 to 2017.
Siak Sri Indrapura Sultanate
The Siak Sri Indrapura Sultanate (Kesultanan Siak Sri Indrapura) was a Malay Islamic kingdom on the Siak River in Riau, Sumatra, founded by Raja Kecik in 1723.
Sialate O-acetylesterase
Sialate O-acetylesterase (SIAE, EC 3.1.1.53), also called sialate 9(4)-O-acetylesterase, is an SGNH-hydrolase that removes 4- and 9-O-acetyl groups from sialic acids; human SIAE (gene 11q24.2) is a secreted 62 kDa glycoprotein linked to autoimmunity.
Sialendoscopy
Sialendoscopy is a minimally invasive endoscopic technique that diagnoses and treats salivary duct disorders, chiefly stones and strictures, using micro-endoscopes inserted into the parotid and submandibular ducts.
Sialic acid
Sialic acid (sialic acids, Neu5Ac) is a family of over 50 nine-carbon acidic sugars terminating cell-surface glycoconjugates, acting in cell recognition, influenza receptor binding, and immune masking; humans lack Neu5Gc via a CMAH mutation.
Sialic acid metabolism
Sialic acid metabolism covers biosynthesis of Neu5Ac from UDP-GlcNAc via GNE, NANS, NANP and CMAS, Golgi sialylation by sialyltransferases, sialidase-mediated turnover, SLC17A5 salvage, NPL catabolism, and disorders such as sialuria, Salla disease, and GNE myopathy.
Sialic acid-binding Ig-like lectin
Siglecs (sialic acid-binding Ig-like lectins) are immunoglobulin-superfamily lectin receptors, mainly on immune cells, that bind sialylated glycans, deliver ITIM-mediated inhibitory signals, and serve as emerging immunotherapy targets.
Sialidase
Sialidase (neuraminidase), glycoside hydrolase removing terminal sialic acid from glycoconjugates; EC 3.2.1.18 hydrolytic, EC 4.2.2.15 anhydrosialidase; GH33/34/58/83/156 families; mammalian NEU1-NEU4; NEU1 defects cause sialidosis.
Sialidosis type 1
Sialidosis type 1, or cherry-red spot myoclonus syndrome (mucolipidosis I), is a rare autosomal recessive lysosomal storage disease caused by NEU1 mutations, causing myoclonus, ataxia, visual loss, and macular cherry-red spots from adolescence.
Sialidosis type 2
Sialidosis type 2 (sialidosis type II, dysmorphic sialidosis, mucolipidosis I): severe early-onset autosomal recessive lysosomal storage disease from NEU1 neuraminidase deficiency, with congenital, infantile, and juvenile forms, coarse facies, cherry-red spots, and no approved disease-modifying therapy.
Sialkot (district)
Sialkot District, Punjab, Pakistan: northeastern district of 4,499,394 people (2023 census) over 3,016 sq km, four tehsils, headquarters Sialkot city; Pakistan's export hub for sports goods and surgical instruments.
Sialkot (سیالکوٹ)
Sialkot (سیالکوٹ), Punjab, Pakistan: export-manufacturing city known for surgical instruments, sports goods, and leather; district population 4,499,394 (2023); home to Sialkot International Airport.
Sialoadenitis
Sialoadenitis (sialadenitis) is acute or chronic inflammation of a salivary gland from bacterial or viral infection, obstruction, radiation, or autoimmune disease; commonly parotid, treated with antibiotics, sialagogues, or sialendoscopy.
Sialography
Sialography is a radiographic technique in which iodinated contrast is injected retrograde into the parotid or submandibular duct to show stones, strictures, and ductal anatomy.
Sialolithiasis
Sialolithiasis (salivary duct stones, salivary calculi): calcified stones blocking salivary gland ducts, mostly submandibular (80%), ages 30-60, causing meal-related pain and swelling; treated by sialendoscopy, lithotripsy, or gland excision.