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Dithianon
Dithianon (CAS 3347-22-6), a non-chlorinated quinone contact fungicide from the 1960s, used preventively against apple and pear scab; EU-approved for fungicidal uses only, with moderate acute toxicity.
Dithiocarbamate
A dithiocarbamate is a monoanionic sulfur-containing ligand, R₂N–C(S)–S⁻, formed from a primary or secondary amine and carbon disulfide, used in metal coordination, fungicides, rubber vulcanization, and mineral flotation.
Dithioesters
Dithioesters are organosulfur compounds of formula R–C(=S)–S–R′, the sulfur analogs of carboxylate esters with both oxygens replaced by sulfur, best known as RAFT chain-transfer agents for living radical polymerization.
Dithiol (analytical reagent)
Dithiol (toluene-3,4-dithiol, C₇H₈S₂) is a colorimetric reagent described in 1936 by W. H. Mills and R. E. D. Clark that forms colored complexes with tin, molybdenum, and tungsten.
Dithionite
Dithionite is the sulfur oxoanion S₂O₄²⁻, a strong reducing agent whose sodium salt, sodium dithionite, is used at industrial scale in vat dyeing, pulp bleaching, and groundwater remediation.
Dithiopyr
Dithiopyr (Dimension) is a pyridine WSSA group 3 preemergence turf herbicide that inhibits microtubule assembly, controlling crabgrass and broadleaf weeds; registered in the US, not approved in the EU.
Dithiothreitol
Dithiothreitol (DTT), also called Cleland's reagent, is a dithiol reducing agent introduced by W. W. Cleland in 1964 to reduce disulfide bonds and keep thiol groups reduced.
Dithizone
Dithizone, or diphenylthiocarbazone, is an intensely dark-green chelating reagent that forms brightly colored, water-insoluble complexes with heavy metals, long used for extracting and measuring trace metals such as lead and mercury.
Dithyramb
A dithyramb (διθύραμβος) was a choral hymn to Dionysus in ancient Greece, first attested in the 7th century BC and performed by a singing, dancing chorus.
Ditlev E. Brodersen
Ditlev E. Brodersen is a Danish structural molecular biologist, professor of structural microbiology at Aarhus University since 2021, known for work on antibiotic binding to the bacterial ribosome.
Ditmar Awards
The Ditmar Awards, formally the Australian SF Awards, are fan-voted awards for Australian science fiction, fantasy, and horror, presented annually since 1969 and named for Melbourne fan Ditmar Jenssen.
Dito Telecommunity
Dito Telecommunity (DITO), formerly the Mislatel Consortium, is the third major telecommunications provider in the Philippines, launched in 2021 by a consortium led by Dennis Uy with China Telecom.
Dito!
Dito! (original title JinxO) is a 2024 word-association party game by Indonesian designer Martin Ang, published by Tabletoys Games and localized by Game Factory. For 3–7 players ages 10+, it won the Spiel des Jahres 2026, the first Southeast Asian winner. Distinct from Ditto (1998) and Dito (University Games, 2009).
DITRA
DITRA (deficiency of interleukin-36 receptor antagonist; OMIM 614204) is a rare autosomal recessive autoinflammatory disease caused by IL36RN mutations, causing recurrent generalized pustular psoriasis flares with fever; treated with spesolimab.
Ditsong National Museum of Natural History
Ditsong National Museum of Natural History (formerly Transvaal Museum), founded as the Staatsmuseum of the ZAR on 1 December 1892 in Pretoria; holds Cradle of Humankind hominid fossils including Mrs Ples, and is one of eight DITSONG museums.
Ditta Puchberger
Ditta Puchberger (Wilhelmina Mathilde Puchberger, 1911-1969) was an Austrian hurdler and sprinter for Wiener AF, a multi-year Austrian 80 m hurdles and 4x100 m relay champion who ran at the 1936 Berlin Olympics.
Dittaino Valles
Dittaino Valles, an IAU-approved valley system (vallis, valles) on Mars near 1.5°S, 67°W, about 138 km across; named in 1985 after the modern Dittaino river in Italy.
Ditto (Pokémon)
Ditto (Metamon, メタモン), #0132, a Normal-type Transform Pokémon from Generation I that copies opponents via Transform and Imposter, breeds with nearly all species, and hides in disguise in Pokémon GO.
Ditto (동감) (2000 film)
Ditto (동감, Donggam) is a 2000 South Korean romance-fantasy film directed by Kim Jung-kwon, starring Kim Ha-neul and Yoo Ji-tae, about students in 1979 and 2000 connected by ham radio; remade in Japan (2001) and Korea (2022).
Ditylenchus destructor
Ditylenchus destructor, the potato rot nematode (Thorne, 1945), is a migratory plant-parasitic nematode rotting potato tubers and over 100 other hosts; distinguished from D. dipsaci by six lateral lines and no anhydrobiotic J4 stage.
Ditylenchus dipsaci
Ditylenchus dipsaci, the stem and bulb nematode (stem nematode, bulb eelworm), is a plant-parasitic Anguinidae nematode infecting over 500 plant species via up to 30 host races; EPPO A2 quarantine pest causing complete crop failure without control.
Diu Crône
Diu Crône ("The Crown") is a Middle High German Arthurian romance of about 30,000 lines by Heinrich von dem Türlin, in which Gawain wins the Grail.
Diuca
Diuca is a monotypic genus of tanagers (Thraupidae) holding only the Common Diuca-Finch, Diuca diuca (Molina, 1782), of Argentina, Bolivia, Brazil, Chile, and Uruguay; its former second species, speculifera, was moved to Chionodacryon after molecular phylogenetic work.
Diuresis
Diuresis is increased urine excretion, from Greek diourein. Distinguished as water diuresis (urine osmolality 300), caused by glucose, mannitol, urea, or diuretic drugs, and induced therapeutically in heart failure and SIAD.
Diuretic
Diuretic: drug that increases renal sodium and water excretion. Classes include loop diuretics (furosemide, NKCC2), thiazides (chlorthalidone, NCC), and potassium-sparing agents; used for hypertension, heart failure, and edema since chlorothiazide's 1958 introduction.
Diuris
Diuris (donkey orchids, double tails) is a genus of about 102 accepted terrestrial orchid species in tribe Diurideae, native to southern and eastern Australia and the Lesser Sunda Islands, named for the two tail-like lateral sepals.
Diuris filifolia
Diuris filifolia (Cat's Face Orchid) is a rare tuberous orchid endemic to southwestern Western Australia, described by Lindley in 1840, with pale yellow brown-marked flowers, known from three disjunct swamp-edge populations and not seen for many years.
Diurnal enuresis
Diurnal enuresis, or daytime urinary incontinence (DUI), is involuntary daytime urine leakage in children aged 5 or older; over 65% of cases are functional, treated first with urotherapy, though trial evidence for interventions remains weak.
Diurnality
Diurnality: the animal activity pattern of being active by day and resting at night, contrasted with nocturnality, crepuscularity, and cathemerality. Mammals re-evolved it repeatedly after a nocturnal origin; the SCN clock is entrained alike in both, with differences downstream.
Diuron
Diuron is a phenylurea herbicide and algicide that blocks photosynthesis in weeds and algae, used on crops like sugarcane and cotton and as a paint preservative.