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Turán's theorem
Turán's theorem is a 1941 result of Pál Turán stating that the graph on n vertices with no complete subgraph on r+1 vertices and the most edges is the Turán graph.
Turandot
Turandot is Puccini's final opera, a three-act dramma lirico on Gozzi's fairy-tale princess, unfinished at his 1924 death and completed by Franco Alfano; premiered 25 April 1926 at La Scala under Toscanini, who stopped the music where Puccini's score ends.
Turanism
Turanism (turancılık) is a nationalist ideology seeking union of Ural-Altaic peoples, including Turks, Hungarians, Finns, and Mongols, under Turkic dominance; derived from Persian Turan, developed in 19th-century Hungarian and Finnish scholarship, with political waves in Hungary and Turkey.
Turanshah (last Ayyubid sultan of Egypt)
Turanshah (توران شاه بن الصالح أيوب) was the last Ayyubid sultan of Egypt, son and heir of al-Salih Ayyub, who reigned briefly during the Seventh Crusade of Louis IX; his death ended Ayyubid rule in Egypt.
Turban
Turban: a long strip of cloth wrapped around the head, also called dastar, pagri, or ʿamāma. Worn for over 4,000 years from Mesopotamia (2350 BC sculpture) across Asia and Africa; central to Sikh identity since Guru Gobind Singh's Khalsa, once universal Muslim male headgear, later banned in Turkey (1925) and Iran.
Turbellaria
Turbellaria, the traditional class of free-living flatworms (planarians, polyclads, rhabdocoels), is now known to be paraphyletic; Platyhelminthes splits into Catenulida and Rhabditophora with parasitic Neodermata nested within.
Turberas de Talamanca
Turberas de Talamanca: high-elevation tropical peatlands (2,400-3,200 m) in Costa Rica's Cordillera de Talamanca, Ramsar Site 1286 since 2003 (192,520 ha), Sphagnum peat, 67 plant species, threatened by fire and the Interamericana Sur road.
Turbidimetry
Turbidimetry is an optical analytical method that quantifies suspended particles by measuring the loss of light transmitted through a suspension, widely used in clinical protein assays and water quality control.
Turbidite
A turbidite is a layer of sediment deposited by a turbidity current, a gravity-driven underwater flow; turbidite beds are typically graded, with a coarse base and a finer cap.
Turbidity
Turbidity is a measure of the relative clarity of water, reported in nephelometric turbidity units (NTU) and caused by suspended particles like clay, silt, and algae that scatter light.
Turbidity current
A turbidity current is a rapid downslope flow of sediment-laden water, the main way sediment reaches the deep ocean, breaking seabed cables as it goes.
Turbidity meter
A turbidity meter, also called a turbidimeter or nephelometer, is an optical instrument that measures water cloudiness by shining light through a sample and measuring scattered light, reported in units such as NTU.
Turbinaria (coral)
Turbinaria (Oken, 1815) is a zooxanthellate genus of foliose stony corals in Dendrophylliidae, Scleractinia, with about 14 Indo-Pacific species such as T. peltata and T. reniformis, known for turbid-water tolerance and dense skeletons.
Turbine
A turbine is a machine in which a moving fluid, such as water, steam, or gas, impinges on blades on a rotor and spins it to produce mechanical work.
Turbine blade
A turbine blade is an airfoil-shaped component mounted on a rotating rotor that extracts energy from hot gas or steam and converts it into shaft power, surviving extreme temperatures through superalloys, internal cooling, and coatings.
Turbine blade cooling
Turbine blade cooling keeps gas turbine and jet engine blades below their material temperature limits using internal convective cooling, film cooling, and thermal barrier coatings.
Turbine disc
A turbine disc is the rotating component of a turbomachine that carries the blades, withstanding large centrifugal stresses and setting the limit on blade speed.
Turbine engine failure
A turbine engine failure is the loss of an aircraft gas turbine engine's thrust or power in flight or on the ground, from shutdown, power loss, or structural failure.
Turbine oil
Turbine oil is a lubricating oil formulated for the circulating oil systems of steam, gas, and combined cycle turbines, typically in ISO VG 32, 46, and 68 grades.
Turbine pump
A turbine pump, usually the deep-well vertical type, is a centrifugal pump whose impellers sit in diffuser bowls down the well while a surface motor drives them.
Turbine vane
A turbine vane is a stationary, airfoil-shaped blade fixed ahead of rotating turbine blades that turns and accelerates hot gas; in gas turbines, vanes are called nozzle guide vanes.
Turbinectomy
Turbinectomy is the surgical removal of part or all of the inferior turbinate, a head and neck surgery procedure done to relieve nasal obstruction from turbinate hypertrophy.
Turbinellidae
Turbinellidae is a family of marine predatory sea snails called chank, trumpet, and vase shells, including Syrinx aruanus, the largest living gastropod, with shells up to a meter.
Turbinia
Turbinia was an experimental steam launch launched on the River Tyne in 1894, the world's first turbine-powered ship, designed by Charles Parsons and displayed in Newcastle.
Turbinidae
Turbinidae (turban shells), family Rafinesque, 1815 of vetigastropod marine snails with solid turban-shaped shells and a calcareous operculum; redefined by molecular phylogenetics, now including Tegulidae, in superfamily Trochoidea.
Turbinoplasty
Turbinoplasty is a surgical procedure that reduces the nasal turbinates, most often the inferior turbinate, to relieve nasal airway obstruction; it is frequently combined with septoplasty.
Turbo (2013 film)
Turbo is a 2013 DreamWorks animated comedy directed by David Soren, about a garden snail voiced by Ryan Reynolds who gains super-speed and races in the Indianapolis 500.
Turbo (2024 film)
Turbo (ടർബോ) is a 2024 Malayalam action comedy thriller directed by Vysakh, written by Midhun Manuel Thomas, starring Mammootty as jeep driver Turbo Jose, with Raj B Shetty as villain; released May 23, 2024 by Mammootty Kampany.
Turbo (gastropod)
Turbo, or the turbo snail, is a genus of large marine snails in the turban shell family Turbinidae, named by Linnaeus in 1758 and fished for food and nacreous shells.
Turbo (group)
Turbo (터보) is a South Korean dance-pop group formed in 1995, first a duo of Kim Jung-nam and Kim Jong-kook, later a trio with Mikey, reuniting in 2015.