All articles starting with T
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Tropico (video game)
Tropico is a 2001 construction and management simulation by PopTop Software in which the player rules a Caribbean banana republic as El Presidente, launching a long-running series.
Tropico 5
Tropico 5 (Tropico 5) is a 2014 city-building and dictator simulation game by Haemimont Games and Kalypso Media, the fifth Tropico entry, spanning Colonial to Modern Times eras with dynasties, research, and series-first multiplayer.
Tropico 7
Tropico 7 (Tropico series, seventh main entry) is a strategy-management-government sim by Gaming Minds Studios and Kalypso Media, announced at Gamescom 2025, releasing January 28, 2027 on PC, Xbox Series X|S, and PS5 with a Political Matrix, terraforming, and reworked military system.
Tropicoqueta
Tropicoqueta is Karol G's fifth studio album, released 20 June 2025 on Bichota: a 20-track pan-Latin record fusing reggaeton with merengue, salsa, bachata, mariachi, cumbia, and Brazilian funk, with guests Thalía, Marco Antonio Solís, and Manu Chao.
Tropicpark
Tropicpark (Тропикпарк) is a contact exotarium in Yevpatoria, Crimea, at 43 Tokareva Street in a dragon-shaped pavilion, holding about 150 exotic species. A 2024 fire killed over 200 animals; the rebuilt five-floor exotarium reopened in 2026.
Tropics
The tropics: the Earth region between the Tropic of Cancer (~23°N) and Tropic of Capricorn (~23°S), where the sun passes overhead; also called the tropical zone, marked by ITCZ rainfall, trade winds, and Hadley circulation.
Tropidoceras
Tropidoceras, also called Tropidoceras Hyatt 1867, is an extinct Early Jurassic ammonite genus in the family Polymorphitidae, type species T. masseanum (d'Orbigny 1844), an index fossil of the Pliensbachian Masseanum Subchronozone.
Tropiduchidae
Tropiduchidae, tropiduchid planthoppers (Hemiptera: Fulgoromorpha), family Stål 1866 with 683 species in 198 genera, two subfamilies Tropiduchinae and Elicinae, tropical worldwide distribution, Eocene fossils, and the date palm pest Ommatissus lybicus.
Tropiduridae
Tropiduridae, tropidurid or neotropical ground lizards, is a family of iguanian lizards from South America, the West Indies, and Galapagos, split from Iguanidae sensu lato by Frost and Etheridge in 1989, with spiny-scaled, diurnal species 4-15 cm long.
Tropidurus
Tropidurus (Wied-Neuwied, 1824) is a genus of tropidurid lizards, also called lava lizards, from open cis-Andean South America; about 30 species in four species groups, known for heliothermy, paraphyletic taxonomy, and Caatinga endemism.
Tropiques
Tropiques was a literary and cultural review published in Fort-de-France, Martinique, from 1941 to 1945, founded by Aimé and Suzanne Césaire and blending surrealism, Negritude, and Marxism.
Tropisetron
Tropisetron (brand name Navoban) is a selective 5-HT3 receptor antagonist developed at Sandoz, a Novartis predecessor company, used to prevent and treat chemotherapy-induced and postoperative nausea and vomiting.
Tropism
Tropism: directional plant growth toward (positive) or away (negative) from stimuli such as light, gravity, water, or touch; phototropism and gravitropism are mediated by asymmetric auxin distribution and statolith sensing.
Tropoelastin
Tropoelastin, the soluble 60-72 kDa monomer precursor of elastin encoded by ELN, coacervates at physiological temperature and self-assembles into elastic fibers; it stretches up to eight times its resting length and underpins elastin-like polypeptide biomaterials.
Tropolone
Tropolone, also called Hydroxytropone, is a non-benzenoid aromatic organic compound, a seven-membered ring bearing adjacent hydroxyl and carbonyl groups. It is the parent of about 200 naturally occurring tropolones and a strong metal-chelating agent.
Tropomodulin
Tropomodulin (Tmod), also called tropomodulin 1–4, is a ~40 kDa actin-binding protein family that caps the pointed (slow-growing) ends of actin filaments; unlike barbed-end cappers, Tmods require tropomyosin for tight capping and stabilize filament lengths in muscle and red blood cells.
Tropomyosin
Tropomyosin (Tm), a two-chained alpha-helical coiled-coil actin-binding protein from TPM1-4 genes, forms head-to-tail cables on actin filaments, spans 4-7 actins, regulates muscle contraction via steric blocking and cytoskeletal dynamics.
Tropomyosin receptor kinase A
Tropomyosin receptor kinase A (TrkA, TRKA), encoded by NTRK1, is the receptor tyrosine kinase for nerve growth factor; discovered as a colon carcinoma oncogene, activated by dimerization and transmembrane rotation, and a drug target in NTRK fusion cancers.
Tropomyosin receptor kinase B
TrkB (NTRK2) is the receptor tyrosine kinase for BDNF and NT-4/5, driving neuronal survival, plasticity, and learning; dysregulated in gliomas and targeted by pan-TRK inhibitors and agonist antibodies.
Tropomyosin receptor kinase C
Tropomyosin receptor kinase C (TrkC, TRKC, NTRK3) is a receptor tyrosine kinase at 15q25.3, the specific receptor for neurotrophin-3, discovered in 1991; essential for proprioception and cardiogenesis, and an oncogenic driver when NTRK3 fusions occur in cancer.
Tropone
Tropone (cyclohepta-2,4,6-trien-1-one, C₇H₆O) is a non-benzenoid aromatic compound with a seven-membered ring bearing a ketone, the parent of the troponoids and a reactive synthon in synthesis.
Troponin
Troponin: cardiac regulatory protein complex (TnC, TnI, TnT) of striated muscle; its cardiac subunits cTnI and cTnT are the standard blood biomarkers for diagnosing myocardial infarction, now measured with high-sensitivity assays.
Troponin I
Troponin I (cTnI) is the inhibitory subunit of the troponin complex and a cardiac-specific biomarker for myocardial infarction; released 4-10 h after injury, measured by high-sensitivity immunoassays against the 99th percentile cutoff.
Troponin T
Troponin T (TnT), encoded by TNNT1, TNNT2, and TNNT3, is the tropomyosin-binding subunit of the troponin complex regulating striated muscle contraction; cardiac cTnT is a key heart-attack blood biomarker.
Tropos (methodology)
Tropos is an agent-oriented, requirements-driven software development methodology proposed by Castro, Kolp, and Mylopoulos in 2002, using actor, goal, and dependency concepts from i across all phases from early requirements analysis to implementation.
Troposphere
The troposphere is the lowest layer of Earth's atmosphere, holding about 75 to 80 percent of its mass and nearly all its water vapor, where almost all weather occurs.
Tropospheric ducting
Tropospheric ducting is radio propagation in which a lower-atmosphere layer traps radio waves and carries them far beyond the normal radio horizon, mostly at VHF and higher frequencies.
Tropospheric propagation
Tropospheric propagation is the transmission of radio waves through the troposphere, where temperature, pressure, and humidity bend, trap, or scatter signals, extending the radio horizon and enabling long-distance ducting.
Tropospheric scatter
Tropospheric scatter, or troposcatter, is an over-the-horizon radio communication method in which signals scatter off tropospheric irregularities, enabling links of roughly 100 to 1,000 miles.
Tropylium cation
The tropylium cation, also called the cycloheptatrienyl cation, is an aromatic C7H7+ carbocation with a planar seven-membered ring and delocalized positive charge, discovered as tropylium bromide in 1891.