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Strain-promoted azide–alkyne cycloaddition
Strain-promoted azide–alkyne cycloaddition (SPAAC) is a copper-free click reaction between an organic azide and a strained cyclooctyne, used for labeling biomolecules on living cells and in antibody–drug conjugates.
Strain-promoted cycloaddition
Strain-promoted cycloaddition is a family of copper-free bioorthogonal reactions in which a strained alkyne, most often a cyclooctyne, reacts with an azide or diene, the release of ring strain driving the reaction.
Strain-release
Strain-release is a strategy in organic synthesis that uses the stored energy of strained rings, such as cyclopropanes and cyclobutanes, to drive carbon–carbon bond cleavage and ring opening.
Strain-release chemistry
Strain-release chemistry is a branch of organic synthesis in which the stored energy of strained small rings drives bond-forming reactions under mild conditions, widely used in drug discovery.
Strain-release functionalization
Strain-release functionalization is a strategy in organic synthesis where the stored strain energy of a small-ring compound, chiefly bicyclo[1.1.0]butane, drives new bond formation under mild conditions.
Strain-release functionalization of bicyclobutanes
Strain-release functionalization of bicyclobutanes is a set of synthetic methods in which bicyclo[1.1.0]butanes' strained central C–C bond is cleaved, yielding functionalized cyclobutanes, bridged bicyclics, and heterocycles under mild conditions.
Strained germanium channel transistor
A strained germanium channel transistor is a MOSFET with a compressively strained germanium channel, boosting hole mobility up to 4 to 25 times for high-performance CMOS.
Strained silicon
Strained silicon is silicon whose lattice is deliberately stretched, usually by growing it on silicon-germanium, raising carrier mobility; Intel commercialized it in its 90 nm process in 2003.
Strained yogurt
Strained yogurt, also called Greek yogurt, labneh, or yogurt cheese, is fermented milk drained of most whey. Regional forms include labneh, chakka, torba, and Icelandic skyr; protein roughly doubles and acid whey is a byproduct.
Straining to void
Straining to void (ICD-11 MF50.65, 腹圧排尿) is a voiding symptom: needing to strain or push to empty the bladder. It signals bladder outlet obstruction or detrusor underactivity and is one of three required symptoms of underactive bladder.
Strait
Strait: a narrow water passage connecting two larger bodies of water, also called a strait or narrows. Formed by tectonics, erosion, or sea-level rise; major straits like Hormuz and Malacca are critical oil and trade chokepoints under UNCLOS transit passage.
Strait of Belle Isle
Strait of Belle Isle: strait between northern Newfoundland and southern Labrador, the Gulf of St. Lawrence's north entrance; about 78 miles long, 9.2 miles wide, ice-free roughly May/June to late December.
Strait of Dover
Strait of Dover (Pas de Calais): 30-km-wide eastern end of the English Channel linking it to the North Sea. Macrotidal, 3–9 m range, first IMO traffic separation scheme (1967), Channel Tunnel, Europe's busiest ferry port.
Strait of Georgia
Strait of Georgia (Georgia Strait), a semi-enclosed sea between Vancouver Island and mainland British Columbia, part of the Salish Sea; named by Vancouver in 1792 for King George III, fed mainly by the Fraser River.
Strait of Gibraltar (مضيق جبل طارق)
Strait of Gibraltar (مضيق جبل طارق), sea passage between Spain and Morocco connecting Atlantic and Mediterranean. 58–60 km long, 14 km wide at Tarifa; two-layer exchange of ~0.8 Sv each; 110,000–120,000 vessels yearly; planned 38.5 km Spain–Morocco rail tunnel.
Strait of Gibraltar crossing
The Strait of Gibraltar crossing, also known as the Gibraltar bridge, is a proposed rail tunnel linking Spain and Morocco, planned at about 42 km long.
Strait of Hormuz (تنگه هرمز)
The Strait of Hormuz (تنگه هرمز) is a narrow waterway between Iran and Oman connecting the Persian Gulf to the Gulf of Oman, and the world's leading oil chokepoint.
Strait of Juan de Fuca
Strait of Juan de Fuca: sea passage between Vancouver Island and Washington's Olympic Peninsula, named 1787 by Barkley after the Greek pilot Juan de Fuca; main Pacific gateway to the Salish Sea with estuarine two-layer flow and about 8,300 deep-draft vessel transits yearly.
Strait of Magellan
The Strait of Magellan (Estrecho de Magallanes) is a 350-mile passage at South America's southern tip separating Patagonia from Tierra del Fuego, first transited by Magellan in 1520.
Strait of Malacca
Strait of Malacca, between Sumatra and the Malay Peninsula, links the Indian and Pacific Oceans and is the world's largest oil chokepoint, carrying 23.2 million b/d, about 29% of seaborne oil, in 1H25.
Strait of Messina
Strait of Messina, also Fiume di Messina, the 3-km-wide passage between Sicily and Calabria linking the Tyrrhenian and Ionian seas, known for 3 m/s tidal currents, Scylla and Charybdis, and the planned €13.5 billion suspension bridge.
Strait of Messina Bridge
The Strait of Messina Bridge is a planned suspension bridge linking Messina in Sicily with Calabria, designed to carry the world's longest suspension span at 3,300 meters.
Strait of Tartary
Strait of Tartary (Tatarskiy Proliv, Mamiya Strait): long strait separating Sakhalin from the Russian mainland, linking the Sea of Okhotsk and Sea of Japan; narrowest part Nevelskoy Strait, 7.5 km wide, 10 m deep, frozen in winter.
Straitjacket
Straitjacket (camisole, strait-waistcoat): a restraint garment with overlong sleeves crossed and buckled behind the back, invented in France around 1770 for psychiatric restraint, later an escapology staple and cultural symbol of insanity.
Straits dollar
The Straits dollar was the currency of the Straits Settlements, Malay States, and British Borneo, divided into 100 cents, from the late nineteenth century until 1939.
Straits of Florida
Straits of Florida: channels between Florida, Cuba, and the Bahamas linking the Gulf of Mexico to the Atlantic; the Florida Current, headwaters of the Gulf Stream, carries about 32 Sv northward through them.
Straits of Mackinac
The Straits of Mackinac are the open-water channel connecting Lake Michigan and Lake Huron, making them hydrologically one lake, the world's largest by surface area; site of the Mackinac Bridge, colonial Michilimackinac, and the disputed Enbridge Line 5 pipeline.
Straits of Tiran (مضيق تيران)
Straits of Tiran (مضيق تيران): narrow strait between Sinai and Tiran Island connecting the Gulf of Aqaba to the Red Sea; sole sea access to Eilat and Aqaba, closed by Egypt in 1967, international waterway under the 1979 Egypt-Israel treaty.
Straits Settlements
The Straits Settlements (1826–1946) was a British colony grouping Singapore, Penang, and Malacca; a fourth presidency of British India, a Crown Colony from 1 April 1867, dissolved in 1946.
Stramenopile
Stramenopiles, also called heterokonts, are a major eukaryote clade in SAR defined by tripartite mastigoneme hairs on the anterior flagellum, spanning diatoms, kelp, oomycetes, Blastocystis, and heterotrophic flagellates in Bigyra and Gyrista.