All articles starting with S
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Small Refinery Exemption
A Small Refinery Exemption is a US EPA waiver under the Clean Air Act freeing a small refinery from Renewable Fuel Standard obligations for disproportionate economic hardship.
Small ribosomal subunit protein aS21
Small ribosomal subunit protein aS21 (archaeal S21) is an archaea-specific 30S ribosomal protein, a zinc finger with C(P)XCG motifs, occupying the eS21 position in eukaryotic ribosomes; identified in Pyrococcus abyssi cryo-EM structures.
Small ribosomal subunit protein mS27, saccharomycetes
Small ribosomal subunit protein mS27, saccharomycetes (IPR059185): the budding-yeast mitoribosomal small-subunit protein MRP13/mS44 (YGR084C), a 324-aa, nonessential 37S mt-SSU component; mammalian ortholog is MRPS27.
Small ribosomal subunit protein uS17, bacteria/chloroplast
Small ribosomal subunit protein uS17, bacteria/chloroplast is a protein family covering uS17 of the 30S ribosomal subunit, encoded in bacteria by rpsQ, and its chloroplast counterpart uS17c.
Small ribosomal subunit protein uS3m, fungi
Small ribosomal subunit protein uS3m, called Var1 in yeast, is the mitochondrially encoded small-subunit mitoribosomal protein of fungi and plants. It forms the mRNA entry channel with uS4 and uS5, has ~30% asparagine from AT-rich mtDNA, and is lost in the yeast CTG clade.
Small ribosomal subunit protein uS8
uS8 is a small ribosomal subunit protein found in bacteria, archaea, and eukaryotes; the 2014 nomenclature unifies bacterial S8, yeast S22, and human S15A under one name, with rRNA binding and bacterial autoregulation roles.
Small ribosomal subunit protein uS9, bacteria/plastid
uS9, formerly bacterial S9 (E. coli rpsI; yeast S16), is a universal small ribosomal subunit protein of bacteria, plastids, and mitochondria; its C-terminal tail contacts P-site tRNA at the decoding center, and plastid RPS9 mutations cause embryo lethality in maize and rice.
Small RNA sequencing
Small RNA sequencing (sRNA-seq, small RNA-seq) profiles short RNAs such as miRNAs (18-23 nt), piRNAs, and tRNA fragments by ligating 3' and 5' adapters, reverse transcribing, PCR amplifying, and size-selecting libraries; adapter ligation bias is its main challenge.
Small Roman Theater or Odeon at Sisak
Small Roman Theater or Odeon at Sisak: remains of a Roman odeon (small theater) found in 2020 under Sisak City Hall, Croatia, after a 6.4-magnitude earthquake; three rows of stone blocks, 20 m internal diameter, displayed under a glass floor.
Small Round Shaped Mound
Small Round Shaped Mound, Tandwa: a centrally protected ASI monument in Sravasti district, Uttar Pradesh, India, recorded by Alexander Cunningham 300 feet east-southeast of the great stupa and identified as the probable remains of a second stupa.
Small satellite
A small satellite, or SmallSat, is an artificial satellite commonly defined as having a wet mass below 500 kilograms, built at a fraction of conventional spacecraft cost.
Small seal script
Small seal script (小篆, also called Qin seal script) is the standardized Chinese script made the empire's official written standard under the Qin dynasty after 221 BC.
Small Soldiers
Small Soldiers is a 1998 American live-action science-fiction comedy directed by Joe Dante, in which military microchips bring toy action figures to life as warring factions.
Small Sports Car SC01 (小跑车SC01)
The Small Sports Car SC01 (小跑车SC01) is a lightweight two-seat electric sports car developed by Tianjin startup TGAT and built by JMEV, which launched it in China as the JMEV 01 in April 2025.
Small sword
The small sword, or smallsword, is a light thrusting civilian sword of the 17th and 18th centuries, descended from the rapier and worn as part of a gentleman's dress.
Small talk
Small talk, or phatic communion (Malinowski, 1923), is brief informal conversation serving social bonding rather than information exchange. It rests on universal turn-taking timing, functions in workplaces, sales, and trust-building, and shows no reliable link to life satisfaction.
Small Temple of Abu Simbel
The Small Temple of Abu Simbel, also called the Temple of Nefertari, is a rock-cut temple in Lower Nubia dedicated to Hathor and Queen Nefertari by Ramesses II.
Small Things Like These
Small Things Like These: Claire Keegan's 2021 Booker-nominated novella and Tim Mielants' 2024 film starring Cillian Murphy as coal merchant Bill Furlong, set in 1985 New Ross, Ireland, confronting Magdalene laundry abuses.
Small Town, Big Story
Small Town, Big Story is a six-part Sky comedy drama created, written and directed by Chris O'Dowd, starring Christina Hendricks and Paddy Considine, set in the fictional Irish village Drumbán, premiered 27 February 2025.
Small VCP/p97-interacting protein
Small VCP/p97-interacting protein (SVIP) is a 77-amino-acid, 9-kDa membrane adaptor that binds VCP/p97 via a VIM motif, inhibits ERAD, promotes autophagy and lysosomal stability, and is linked to FTD and cancer.
Small waterplane area twin hull
A small waterplane area twin hull (SWATH) is a twin-hull ship with two submerged hulls joined by struts to an upper platform, staying stable in rough seas.
Small Wonder (TV series)
Small Wonder: American sci-fi family sitcom in first-run syndication 1985-1989, 4 seasons, 96 episodes. Created by Howard Leeds; Ted Lawson's robot daughter V.I.C.I. (Vicki), played by Tiffany Brissette, a syndication hit despite poor reviews.
Small World (board game)
Small World, Days of Wonder 2009 board game by Philippe Keyaerts, a fantasy reworking of Vinci; 2-5 players, 14 races, 20 powers, decline-and-restart civilization cycling, conquest costing tokens per region.
Small-angle approximation
The small-angle approximation, or small-angle formula, replaces sin θ and tan θ with θ for small angles in radians, turning trigonometric equations into linear ones.
Small-angle neutron scattering
Small-angle neutron scattering (SANS) directs a collimated cold neutron beam through a sample and records small-angle scattering to characterize structure from roughly 1 nm to 1 µm.
Small-angle scattering
Small-angle scattering is a family of experimental techniques that uses X-rays or neutrons to determine the size, shape, and molecular weight of structures on the nanometer scale.
Small-angle X-ray scattering
Small-angle X-ray scattering (SAXS) is an experimental technique that records X-rays scattered at small angles to characterize the structure of materials on nanometer length scales.
Small-area analysis
Small-area analysis, also known as small-area variation, is an epidemiological method comparing health care utilization and spending across small geographic areas, founded by John Wennberg in Vermont in 1973.
Small-cell carcinoma
Small-cell carcinoma (oat cell cancer) is a fast-growing neuroendocrine cancer, usually of the lung, strongly linked to smoking, marked by TP53/RB1 loss, treated with platinum-etoposide chemoradiation, PD-L1 inhibitors, and tarlatamab.
Small-conductance mechanosensitive channel
MscS, the small-conductance mechanosensitive channel of E. coli, is a heptameric ~1 nS tension-gated bacterial emergency release valve protecting cells from hypoosmotic shock, founding member of the MscS-like superfamily.